* [PATCH v3 01/24] gdbstub/internals.h: clean up include guard
2023-02-21 22:52 [PATCH v3 00/24] gdbstub: re-organise to for better compilation behaviour Alex Bennée
@ 2023-02-21 22:52 ` Alex Bennée
2023-02-21 22:52 ` [PATCH v3 02/24] gdbstub: fix-up copyright and license files Alex Bennée
` (22 subsequent siblings)
23 siblings, 0 replies; 32+ messages in thread
From: Alex Bennée @ 2023-02-21 22:52 UTC (permalink / raw)
To: qemu-devel
Cc: Thomas Huth, qemu-arm, qemu-riscv, qemu-s390x, Yoshinori Sato,
nicolas.eder, Stafford Horne, Daniel Henrique Barboza,
Mahmoud Mandour, Taylor Simpson, mads, Marek Vasut,
Artyom Tarasenko, Alistair Francis, qemu-ppc, Yanan Wang,
Sunil Muthuswamy, Cédric Le Goater, Eduardo Habkost,
Bin Meng, Bastian Koppelmann, Palmer Dabbelt, Marcel Apfelbaum,
Laurent Vivier, Philippe Mathieu-Daudé, Michael Rolnik,
Aleksandar Rikalo, Paolo Bonzini, Alex Bennée,
Aurelien Jarno, Xiaojuan Yang, Richard Henderson, Peter Maydell,
Alexandre Iooss, Chris Wulff, Jiaxun Yang, David Gibson,
Edgar E. Iglesias, Greg Kurz, David Hildenbrand, Song Gao,
Ilya Leoshkevich, Max Filippov, Mark Cave-Ayland, Bin Meng
Use something more specific to avoid name clashes.
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
gdbstub/internals.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/gdbstub/internals.h b/gdbstub/internals.h
index eabb0341d1..b444f24ef5 100644
--- a/gdbstub/internals.h
+++ b/gdbstub/internals.h
@@ -6,12 +6,12 @@
* SPDX-License-Identifier: GPL-2.0-or-later
*/
-#ifndef _INTERNALS_H_
-#define _INTERNALS_H_
+#ifndef GDBSTUB_INTERNALS_H
+#define GDBSTUB_INTERNALS_H
bool gdb_supports_guest_debug(void);
int gdb_breakpoint_insert(CPUState *cs, int type, hwaddr addr, hwaddr len);
int gdb_breakpoint_remove(CPUState *cs, int type, hwaddr addr, hwaddr len);
void gdb_breakpoint_remove_all(CPUState *cs);
-#endif /* _INTERNALS_H_ */
+#endif /* GDBSTUB_INTERNALS_H */
--
2.39.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v3 02/24] gdbstub: fix-up copyright and license files
2023-02-21 22:52 [PATCH v3 00/24] gdbstub: re-organise to for better compilation behaviour Alex Bennée
2023-02-21 22:52 ` [PATCH v3 01/24] gdbstub/internals.h: clean up include guard Alex Bennée
@ 2023-02-21 22:52 ` Alex Bennée
2023-02-21 22:52 ` [PATCH v3 03/24] gdbstub: Make syscall_complete/[gs]et_reg target-agnostic typedefs Alex Bennée
` (21 subsequent siblings)
23 siblings, 0 replies; 32+ messages in thread
From: Alex Bennée @ 2023-02-21 22:52 UTC (permalink / raw)
To: qemu-devel
Cc: Thomas Huth, qemu-arm, qemu-riscv, qemu-s390x, Yoshinori Sato,
nicolas.eder, Stafford Horne, Daniel Henrique Barboza,
Mahmoud Mandour, Taylor Simpson, mads, Marek Vasut,
Artyom Tarasenko, Alistair Francis, qemu-ppc, Yanan Wang,
Sunil Muthuswamy, Cédric Le Goater, Eduardo Habkost,
Bin Meng, Bastian Koppelmann, Palmer Dabbelt, Marcel Apfelbaum,
Laurent Vivier, Philippe Mathieu-Daudé, Michael Rolnik,
Aleksandar Rikalo, Paolo Bonzini, Alex Bennée,
Aurelien Jarno, Xiaojuan Yang, Richard Henderson, Peter Maydell,
Alexandre Iooss, Chris Wulff, Jiaxun Yang, David Gibson,
Edgar E. Iglesias, Greg Kurz, David Hildenbrand, Song Gao,
Ilya Leoshkevich, Max Filippov, Mark Cave-Ayland
When I started splitting gdbstub apart I was a little too boilerplate
with my file headers. Fix up to carry over Fabrice's copyright and the
LGPL license header.
Fixes: ae7467b1ac (gdbstub: move breakpoint logic to accel ops)
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
gdbstub/softmmu.c | 3 ++-
gdbstub/user.c | 3 ++-
2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/gdbstub/softmmu.c b/gdbstub/softmmu.c
index f208c6cf15..183dfb40e4 100644
--- a/gdbstub/softmmu.c
+++ b/gdbstub/softmmu.c
@@ -4,9 +4,10 @@
* Debug integration depends on support from the individual
* accelerators so most of this involves calling the ops helpers.
*
+ * Copyright (c) 2003-2005 Fabrice Bellard
* Copyright (c) 2022 Linaro Ltd
*
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: LGPL-2.0+
*/
#include "qemu/osdep.h"
diff --git a/gdbstub/user.c b/gdbstub/user.c
index 033e5fdd71..a5f370bcf9 100644
--- a/gdbstub/user.c
+++ b/gdbstub/user.c
@@ -3,9 +3,10 @@
*
* We know for user-mode we are using TCG so we can call stuff directly.
*
+ * Copyright (c) 2003-2005 Fabrice Bellard
* Copyright (c) 2022 Linaro Ltd
*
- * SPDX-License-Identifier: GPL-2.0-or-later
+ * SPDX-License-Identifier: LGPL-2.0+
*/
#include "qemu/osdep.h"
--
2.39.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v3 03/24] gdbstub: Make syscall_complete/[gs]et_reg target-agnostic typedefs
2023-02-21 22:52 [PATCH v3 00/24] gdbstub: re-organise to for better compilation behaviour Alex Bennée
2023-02-21 22:52 ` [PATCH v3 01/24] gdbstub/internals.h: clean up include guard Alex Bennée
2023-02-21 22:52 ` [PATCH v3 02/24] gdbstub: fix-up copyright and license files Alex Bennée
@ 2023-02-21 22:52 ` Alex Bennée
2023-02-21 22:52 ` [PATCH v3 04/24] gdbstub: define separate user/system structures Alex Bennée
` (20 subsequent siblings)
23 siblings, 0 replies; 32+ messages in thread
From: Alex Bennée @ 2023-02-21 22:52 UTC (permalink / raw)
To: qemu-devel
Cc: Thomas Huth, qemu-arm, qemu-riscv, qemu-s390x, Yoshinori Sato,
nicolas.eder, Stafford Horne, Daniel Henrique Barboza,
Mahmoud Mandour, Taylor Simpson, mads, Marek Vasut,
Artyom Tarasenko, Alistair Francis, qemu-ppc, Yanan Wang,
Sunil Muthuswamy, Cédric Le Goater, Eduardo Habkost,
Bin Meng, Bastian Koppelmann, Palmer Dabbelt, Marcel Apfelbaum,
Laurent Vivier, Philippe Mathieu-Daudé, Michael Rolnik,
Aleksandar Rikalo, Paolo Bonzini, Alex Bennée,
Aurelien Jarno, Xiaojuan Yang, Richard Henderson, Peter Maydell,
Alexandre Iooss, Chris Wulff, Jiaxun Yang, David Gibson,
Edgar E. Iglesias, Greg Kurz, David Hildenbrand, Song Gao,
Ilya Leoshkevich, Max Filippov, Mark Cave-Ayland
From: Philippe Mathieu-Daudé <philmd@linaro.org>
Prototypes using gdb_syscall_complete_cb() or gdb_?et_reg_cb()
don't depend on "cpu.h", thus are not target-specific.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20221214143659.62133-1-philmd@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
include/exec/gdbstub.h | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/include/exec/gdbstub.h b/include/exec/gdbstub.h
index f667014888..1636fb3841 100644
--- a/include/exec/gdbstub.h
+++ b/include/exec/gdbstub.h
@@ -71,9 +71,6 @@ struct gdb_timeval {
uint64_t tv_usec; /* microsecond */
} QEMU_PACKED;
-#ifdef NEED_CPU_H
-#include "cpu.h"
-
typedef void (*gdb_syscall_complete_cb)(CPUState *cpu, uint64_t ret, int err);
/**
@@ -126,6 +123,7 @@ int gdb_handlesig(CPUState *, int);
void gdb_signalled(CPUArchState *, int);
void gdbserver_fork(CPUState *);
#endif
+
/* Get or set a register. Returns the size of the register. */
typedef int (*gdb_get_reg_cb)(CPUArchState *env, GByteArray *buf, int reg);
typedef int (*gdb_set_reg_cb)(CPUArchState *env, uint8_t *buf, int reg);
@@ -133,6 +131,9 @@ void gdb_register_coprocessor(CPUState *cpu,
gdb_get_reg_cb get_reg, gdb_set_reg_cb set_reg,
int num_regs, const char *xml, int g_pos);
+#ifdef NEED_CPU_H
+#include "cpu.h"
+
/*
* The GDB remote protocol transfers values in target byte order. As
* the gdbstub may be batching up several register values we always
--
2.39.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v3 04/24] gdbstub: define separate user/system structures
2023-02-21 22:52 [PATCH v3 00/24] gdbstub: re-organise to for better compilation behaviour Alex Bennée
` (2 preceding siblings ...)
2023-02-21 22:52 ` [PATCH v3 03/24] gdbstub: Make syscall_complete/[gs]et_reg target-agnostic typedefs Alex Bennée
@ 2023-02-21 22:52 ` Alex Bennée
2023-02-21 22:52 ` [PATCH v3 05/24] gdbstub: move GDBState to shared internals header Alex Bennée
` (19 subsequent siblings)
23 siblings, 0 replies; 32+ messages in thread
From: Alex Bennée @ 2023-02-21 22:52 UTC (permalink / raw)
To: qemu-devel
Cc: Thomas Huth, qemu-arm, qemu-riscv, qemu-s390x, Yoshinori Sato,
nicolas.eder, Stafford Horne, Daniel Henrique Barboza,
Mahmoud Mandour, Taylor Simpson, mads, Marek Vasut,
Artyom Tarasenko, Alistair Francis, qemu-ppc, Yanan Wang,
Sunil Muthuswamy, Cédric Le Goater, Eduardo Habkost,
Bin Meng, Bastian Koppelmann, Palmer Dabbelt, Marcel Apfelbaum,
Laurent Vivier, Philippe Mathieu-Daudé, Michael Rolnik,
Aleksandar Rikalo, Paolo Bonzini, Alex Bennée,
Aurelien Jarno, Xiaojuan Yang, Richard Henderson, Peter Maydell,
Alexandre Iooss, Chris Wulff, Jiaxun Yang, David Gibson,
Edgar E. Iglesias, Greg Kurz, David Hildenbrand, Song Gao,
Ilya Leoshkevich, Max Filippov, Mark Cave-Ayland
In preparation for moving user/softmmu specific bits from the main
gdbstub file we need to separate the connection details into a
user/softmmu state. As these will eventually be defined in their own
files we move them out of the common GDBState structure.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
v3
- split into gdbserver_[user|system]_state now to avoid later hoop
jumping
---
gdbstub/gdbstub.c | 94 ++++++++++++++++++++++++++---------------------
1 file changed, 53 insertions(+), 41 deletions(-)
diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c
index be88ca0d71..86564adeba 100644
--- a/gdbstub/gdbstub.c
+++ b/gdbstub/gdbstub.c
@@ -342,6 +342,22 @@ enum RSState {
RS_CHKSUM1,
RS_CHKSUM2,
};
+
+#ifdef CONFIG_USER_ONLY
+typedef struct {
+ int fd;
+ char *socket_path;
+ int running_state;
+} GDBUserState;
+static GDBUserState gdbserver_user_state;
+#else
+typedef struct {
+ CharBackend chr;
+ Chardev *mon_chr;
+} GDBSystemState;
+static GDBSystemState gdbserver_system_state;
+#endif
+
typedef struct GDBState {
bool init; /* have we been initialised? */
CPUState *c_cpu; /* current CPU for step/continue ops */
@@ -354,14 +370,6 @@ typedef struct GDBState {
int line_csum; /* checksum at the end of the packet */
GByteArray *last_packet;
int signal;
-#ifdef CONFIG_USER_ONLY
- int fd;
- char *socket_path;
- int running_state;
-#else
- CharBackend chr;
- Chardev *mon_chr;
-#endif
bool multiprocess;
GDBProcess *processes;
int process_num;
@@ -413,15 +421,17 @@ static int get_char(void)
int ret;
for(;;) {
- ret = recv(gdbserver_state.fd, &ch, 1, 0);
+ ret = recv(gdbserver_user_state.fd, &ch, 1, 0);
if (ret < 0) {
- if (errno == ECONNRESET)
- gdbserver_state.fd = -1;
- if (errno != EINTR)
+ if (errno == ECONNRESET) {
+ gdbserver_user_state.fd = -1;
+ }
+ if (errno != EINTR) {
return -1;
+ }
} else if (ret == 0) {
- close(gdbserver_state.fd);
- gdbserver_state.fd = -1;
+ close(gdbserver_user_state.fd);
+ gdbserver_user_state.fd = -1;
return -1;
} else {
break;
@@ -480,7 +490,7 @@ static inline void gdb_continue(void)
{
#ifdef CONFIG_USER_ONLY
- gdbserver_state.running_state = 1;
+ gdbserver_user_state.running_state = 1;
trace_gdbstub_op_continue();
#else
if (!runstate_needs_reset()) {
@@ -509,7 +519,7 @@ static int gdb_continue_partial(char *newstates)
cpu_single_step(cpu, gdbserver_state.sstep_flags);
}
}
- gdbserver_state.running_state = 1;
+ gdbserver_user_state.running_state = 1;
#else
int flag = 0;
@@ -561,7 +571,7 @@ static void put_buffer(const uint8_t *buf, int len)
int ret;
while (len > 0) {
- ret = send(gdbserver_state.fd, buf, len, 0);
+ ret = send(gdbserver_user_state.fd, buf, len, 0);
if (ret < 0) {
if (errno != EINTR)
return;
@@ -573,7 +583,7 @@ static void put_buffer(const uint8_t *buf, int len)
#else
/* XXX this blocks entire thread. Rewrite to use
* qemu_chr_fe_write and background I/O callbacks */
- qemu_chr_fe_write_all(&gdbserver_state.chr, buf, len);
+ qemu_chr_fe_write_all(&gdbserver_system_state.chr, buf, len);
#endif
}
@@ -2095,7 +2105,8 @@ static void handle_query_rcmd(GArray *params, void *user_ctx)
len = len / 2;
hextomem(gdbserver_state.mem_buf, get_param(params, 0)->data, len);
g_byte_array_append(gdbserver_state.mem_buf, &zero, 1);
- qemu_chr_be_write(gdbserver_state.mon_chr, gdbserver_state.mem_buf->data,
+ qemu_chr_be_write(gdbserver_system_state.mon_chr,
+ gdbserver_state.mem_buf->data,
gdbserver_state.mem_buf->len);
put_packet("OK");
}
@@ -3028,10 +3039,10 @@ void gdb_exit(int code)
return;
}
#ifdef CONFIG_USER_ONLY
- if (gdbserver_state.socket_path) {
- unlink(gdbserver_state.socket_path);
+ if (gdbserver_user_state.socket_path) {
+ unlink(gdbserver_user_state.socket_path);
}
- if (gdbserver_state.fd < 0) {
+ if (gdbserver_user_state.fd < 0) {
return;
}
#endif
@@ -3042,7 +3053,7 @@ void gdb_exit(int code)
put_packet(buf);
#ifndef CONFIG_USER_ONLY
- qemu_chr_fe_deinit(&gdbserver_state.chr, true);
+ qemu_chr_fe_deinit(&gdbserver_system_state.chr, true);
#endif
}
@@ -3078,7 +3089,7 @@ gdb_handlesig(CPUState *cpu, int sig)
char buf[256];
int n;
- if (!gdbserver_state.init || gdbserver_state.fd < 0) {
+ if (!gdbserver_state.init || gdbserver_user_state.fd < 0) {
return sig;
}
@@ -3096,15 +3107,15 @@ gdb_handlesig(CPUState *cpu, int sig)
}
/* put_packet() might have detected that the peer terminated the
connection. */
- if (gdbserver_state.fd < 0) {
+ if (gdbserver_user_state.fd < 0) {
return sig;
}
sig = 0;
gdbserver_state.state = RS_IDLE;
- gdbserver_state.running_state = 0;
- while (gdbserver_state.running_state == 0) {
- n = read(gdbserver_state.fd, buf, 256);
+ gdbserver_user_state.running_state = 0;
+ while (gdbserver_user_state.running_state == 0) {
+ n = read(gdbserver_user_state.fd, buf, 256);
if (n > 0) {
int i;
@@ -3115,9 +3126,9 @@ gdb_handlesig(CPUState *cpu, int sig)
/* XXX: Connection closed. Should probably wait for another
connection before continuing. */
if (n == 0) {
- close(gdbserver_state.fd);
+ close(gdbserver_user_state.fd);
}
- gdbserver_state.fd = -1;
+ gdbserver_user_state.fd = -1;
return sig;
}
}
@@ -3131,7 +3142,7 @@ void gdb_signalled(CPUArchState *env, int sig)
{
char buf[4];
- if (!gdbserver_state.init || gdbserver_state.fd < 0) {
+ if (!gdbserver_state.init || gdbserver_user_state.fd < 0) {
return;
}
@@ -3146,7 +3157,7 @@ static void gdb_accept_init(int fd)
gdbserver_state.processes[0].attached = true;
gdbserver_state.c_cpu = gdb_first_attached_cpu();
gdbserver_state.g_cpu = gdbserver_state.c_cpu;
- gdbserver_state.fd = fd;
+ gdbserver_user_state.fd = fd;
gdb_has_xml = false;
}
@@ -3278,7 +3289,7 @@ int gdbserver_start(const char *port_or_path)
if (port > 0 && gdb_accept_tcp(gdb_fd)) {
return 0;
} else if (gdb_accept_socket(gdb_fd)) {
- gdbserver_state.socket_path = g_strdup(port_or_path);
+ gdbserver_user_state.socket_path = g_strdup(port_or_path);
return 0;
}
@@ -3290,11 +3301,11 @@ int gdbserver_start(const char *port_or_path)
/* Disable gdb stub for child processes. */
void gdbserver_fork(CPUState *cpu)
{
- if (!gdbserver_state.init || gdbserver_state.fd < 0) {
+ if (!gdbserver_state.init || gdbserver_user_state.fd < 0) {
return;
}
- close(gdbserver_state.fd);
- gdbserver_state.fd = -1;
+ close(gdbserver_user_state.fd);
+ gdbserver_user_state.fd = -1;
cpu_breakpoint_remove_all(cpu, BP_GDB);
cpu_watchpoint_remove_all(cpu, BP_GDB);
}
@@ -3488,21 +3499,22 @@ int gdbserver_start(const char *device)
NULL, NULL, &error_abort);
monitor_init_hmp(mon_chr, false, &error_abort);
} else {
- qemu_chr_fe_deinit(&gdbserver_state.chr, true);
- mon_chr = gdbserver_state.mon_chr;
+ qemu_chr_fe_deinit(&gdbserver_system_state.chr, true);
+ mon_chr = gdbserver_system_state.mon_chr;
reset_gdbserver_state();
}
create_processes(&gdbserver_state);
if (chr) {
- qemu_chr_fe_init(&gdbserver_state.chr, chr, &error_abort);
- qemu_chr_fe_set_handlers(&gdbserver_state.chr, gdb_chr_can_receive,
+ qemu_chr_fe_init(&gdbserver_system_state.chr, chr, &error_abort);
+ qemu_chr_fe_set_handlers(&gdbserver_system_state.chr,
+ gdb_chr_can_receive,
gdb_chr_receive, gdb_chr_event,
NULL, &gdbserver_state, NULL, true);
}
gdbserver_state.state = chr ? RS_IDLE : RS_INACTIVE;
- gdbserver_state.mon_chr = mon_chr;
+ gdbserver_system_state.mon_chr = mon_chr;
gdbserver_state.current_syscall_cb = NULL;
return 0;
--
2.39.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v3 05/24] gdbstub: move GDBState to shared internals header
2023-02-21 22:52 [PATCH v3 00/24] gdbstub: re-organise to for better compilation behaviour Alex Bennée
` (3 preceding siblings ...)
2023-02-21 22:52 ` [PATCH v3 04/24] gdbstub: define separate user/system structures Alex Bennée
@ 2023-02-21 22:52 ` Alex Bennée
2023-02-21 22:52 ` [PATCH v3 06/24] includes: move tb_flush into its own header Alex Bennée
` (18 subsequent siblings)
23 siblings, 0 replies; 32+ messages in thread
From: Alex Bennée @ 2023-02-21 22:52 UTC (permalink / raw)
To: qemu-devel
Cc: Thomas Huth, qemu-arm, qemu-riscv, qemu-s390x, Yoshinori Sato,
nicolas.eder, Stafford Horne, Daniel Henrique Barboza,
Mahmoud Mandour, Taylor Simpson, mads, Marek Vasut,
Artyom Tarasenko, Alistair Francis, qemu-ppc, Yanan Wang,
Sunil Muthuswamy, Cédric Le Goater, Eduardo Habkost,
Bin Meng, Bastian Koppelmann, Palmer Dabbelt, Marcel Apfelbaum,
Laurent Vivier, Philippe Mathieu-Daudé, Michael Rolnik,
Aleksandar Rikalo, Paolo Bonzini, Alex Bennée,
Aurelien Jarno, Xiaojuan Yang, Richard Henderson, Peter Maydell,
Alexandre Iooss, Chris Wulff, Jiaxun Yang, David Gibson,
Edgar E. Iglesias, Greg Kurz, David Hildenbrand, Song Gao,
Ilya Leoshkevich, Max Filippov, Mark Cave-Ayland
We are about to split softmmu and user mode helpers into different
files. To facilitate this we will need to share access to the GDBState
between those files.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
v3
- as we split user/system state earlier we can remove the #define hack
---
gdbstub/internals.h | 50 +++++++++++++++++++++++++++++++++++++++++++++
gdbstub/gdbstub.c | 42 -------------------------------------
2 files changed, 50 insertions(+), 42 deletions(-)
diff --git a/gdbstub/internals.h b/gdbstub/internals.h
index b444f24ef5..de56328a2c 100644
--- a/gdbstub/internals.h
+++ b/gdbstub/internals.h
@@ -9,6 +9,56 @@
#ifndef GDBSTUB_INTERNALS_H
#define GDBSTUB_INTERNALS_H
+#define MAX_PACKET_LENGTH 4096
+
+/*
+ * Shared structures and definitions
+ */
+
+typedef struct GDBProcess {
+ uint32_t pid;
+ bool attached;
+
+ char target_xml[1024];
+} GDBProcess;
+
+enum RSState {
+ RS_INACTIVE,
+ RS_IDLE,
+ RS_GETLINE,
+ RS_GETLINE_ESC,
+ RS_GETLINE_RLE,
+ RS_CHKSUM1,
+ RS_CHKSUM2,
+};
+
+typedef struct GDBState {
+ bool init; /* have we been initialised? */
+ CPUState *c_cpu; /* current CPU for step/continue ops */
+ CPUState *g_cpu; /* current CPU for other ops */
+ CPUState *query_cpu; /* for q{f|s}ThreadInfo */
+ enum RSState state; /* parsing state */
+ char line_buf[MAX_PACKET_LENGTH];
+ int line_buf_index;
+ int line_sum; /* running checksum */
+ int line_csum; /* checksum at the end of the packet */
+ GByteArray *last_packet;
+ int signal;
+ bool multiprocess;
+ GDBProcess *processes;
+ int process_num;
+ char syscall_buf[256];
+ gdb_syscall_complete_cb current_syscall_cb;
+ GString *str_buf;
+ GByteArray *mem_buf;
+ int sstep_flags;
+ int supported_sstep_flags;
+} GDBState;
+
+/*
+ * Break/Watch point support - there is an implementation for softmmu
+ * and user mode.
+ */
bool gdb_supports_guest_debug(void);
int gdb_breakpoint_insert(CPUState *cs, int type, hwaddr addr, hwaddr len);
int gdb_breakpoint_remove(CPUState *cs, int type, hwaddr addr, hwaddr len);
diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c
index 86564adeba..f419425cb0 100644
--- a/gdbstub/gdbstub.c
+++ b/gdbstub/gdbstub.c
@@ -41,8 +41,6 @@
#include "hw/boards.h"
#endif
-#define MAX_PACKET_LENGTH 4096
-
#include "qemu/sockets.h"
#include "sysemu/hw_accel.h"
#include "sysemu/runstate.h"
@@ -326,23 +324,6 @@ typedef struct GDBRegisterState {
struct GDBRegisterState *next;
} GDBRegisterState;
-typedef struct GDBProcess {
- uint32_t pid;
- bool attached;
-
- char target_xml[1024];
-} GDBProcess;
-
-enum RSState {
- RS_INACTIVE,
- RS_IDLE,
- RS_GETLINE,
- RS_GETLINE_ESC,
- RS_GETLINE_RLE,
- RS_CHKSUM1,
- RS_CHKSUM2,
-};
-
#ifdef CONFIG_USER_ONLY
typedef struct {
int fd;
@@ -358,29 +339,6 @@ typedef struct {
static GDBSystemState gdbserver_system_state;
#endif
-typedef struct GDBState {
- bool init; /* have we been initialised? */
- CPUState *c_cpu; /* current CPU for step/continue ops */
- CPUState *g_cpu; /* current CPU for other ops */
- CPUState *query_cpu; /* for q{f|s}ThreadInfo */
- enum RSState state; /* parsing state */
- char line_buf[MAX_PACKET_LENGTH];
- int line_buf_index;
- int line_sum; /* running checksum */
- int line_csum; /* checksum at the end of the packet */
- GByteArray *last_packet;
- int signal;
- bool multiprocess;
- GDBProcess *processes;
- int process_num;
- char syscall_buf[256];
- gdb_syscall_complete_cb current_syscall_cb;
- GString *str_buf;
- GByteArray *mem_buf;
- int sstep_flags;
- int supported_sstep_flags;
-} GDBState;
-
static GDBState gdbserver_state;
static void init_gdbserver_state(void)
--
2.39.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v3 06/24] includes: move tb_flush into its own header
2023-02-21 22:52 [PATCH v3 00/24] gdbstub: re-organise to for better compilation behaviour Alex Bennée
` (4 preceding siblings ...)
2023-02-21 22:52 ` [PATCH v3 05/24] gdbstub: move GDBState to shared internals header Alex Bennée
@ 2023-02-21 22:52 ` Alex Bennée
2023-02-21 22:52 ` [PATCH v3 07/24] gdbstub: move fromhex/tohex routines to internals Alex Bennée
` (17 subsequent siblings)
23 siblings, 0 replies; 32+ messages in thread
From: Alex Bennée @ 2023-02-21 22:52 UTC (permalink / raw)
To: qemu-devel
Cc: Thomas Huth, qemu-arm, qemu-riscv, qemu-s390x, Yoshinori Sato,
nicolas.eder, Stafford Horne, Daniel Henrique Barboza,
Mahmoud Mandour, Taylor Simpson, mads, Marek Vasut,
Artyom Tarasenko, Alistair Francis, qemu-ppc, Yanan Wang,
Sunil Muthuswamy, Cédric Le Goater, Eduardo Habkost,
Bin Meng, Bastian Koppelmann, Palmer Dabbelt, Marcel Apfelbaum,
Laurent Vivier, Philippe Mathieu-Daudé, Michael Rolnik,
Aleksandar Rikalo, Paolo Bonzini, Alex Bennée,
Aurelien Jarno, Xiaojuan Yang, Richard Henderson, Peter Maydell,
Alexandre Iooss, Chris Wulff, Jiaxun Yang, David Gibson,
Edgar E. Iglesias, Greg Kurz, David Hildenbrand, Song Gao,
Ilya Leoshkevich, Max Filippov, Mark Cave-Ayland
This aids subsystems (like gdbstub) that want to trigger a flush
without pulling target specific headers.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
v2
- actually include the header and rename to tb-flush.h
- better kerneldoc style comment for the function
---
include/exec/exec-all.h | 1 -
include/exec/tb-flush.h | 26 ++++++++++++++++++++++++++
linux-user/user-internals.h | 1 +
accel/stubs/tcg-stub.c | 1 +
accel/tcg/tb-maint.c | 1 +
accel/tcg/translate-all.c | 1 +
cpu.c | 1 +
gdbstub/gdbstub.c | 1 +
hw/ppc/spapr_hcall.c | 1 +
plugins/core.c | 1 +
plugins/loader.c | 2 +-
target/alpha/sys_helper.c | 1 +
target/riscv/csr.c | 1 +
13 files changed, 37 insertions(+), 2 deletions(-)
create mode 100644 include/exec/tb-flush.h
diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h
index 0e36f4d063..539768dc50 100644
--- a/include/exec/exec-all.h
+++ b/include/exec/exec-all.h
@@ -687,7 +687,6 @@ void tb_invalidate_phys_addr(target_ulong addr);
#else
void tb_invalidate_phys_addr(AddressSpace *as, hwaddr addr, MemTxAttrs attrs);
#endif
-void tb_flush(CPUState *cpu);
void tb_phys_invalidate(TranslationBlock *tb, tb_page_addr_t page_addr);
void tb_invalidate_phys_range(tb_page_addr_t start, tb_page_addr_t end);
void tb_set_jmp_target(TranslationBlock *tb, int n, uintptr_t addr);
diff --git a/include/exec/tb-flush.h b/include/exec/tb-flush.h
new file mode 100644
index 0000000000..d92d06565b
--- /dev/null
+++ b/include/exec/tb-flush.h
@@ -0,0 +1,26 @@
+/*
+ * tb-flush prototype for use by the rest of the system.
+ *
+ * Copyright (c) 2022 Linaro Ltd
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+#ifndef _TB_FLUSH_H_
+#define _TB_FLUSH_H_
+
+/**
+ * tb_flush() - flush all translation blocks
+ * @cs: CPUState (must be valid, but treated as anonymous pointer)
+ *
+ * Used to flush all the translation blocks in the system. Sometimes
+ * it is simpler to flush everything than work out which individual
+ * translations are now invalid and ensure they are not called
+ * anymore.
+ *
+ * tb_flush() takes care of running the flush in an exclusive context
+ * if it is not already running in one. This means no guest code will
+ * run until this complete.
+ */
+void tb_flush(CPUState *cs);
+
+#endif /* _TB_FLUSH_H_ */
diff --git a/linux-user/user-internals.h b/linux-user/user-internals.h
index 3576da413f..9333db4f51 100644
--- a/linux-user/user-internals.h
+++ b/linux-user/user-internals.h
@@ -20,6 +20,7 @@
#include "exec/user/thunk.h"
#include "exec/exec-all.h"
+#include "exec/tb-flush.h"
#include "qemu/log.h"
extern char *exec_path;
diff --git a/accel/stubs/tcg-stub.c b/accel/stubs/tcg-stub.c
index c1b05767c0..e0d371c3a7 100644
--- a/accel/stubs/tcg-stub.c
+++ b/accel/stubs/tcg-stub.c
@@ -11,6 +11,7 @@
*/
#include "qemu/osdep.h"
+#include "exec/tb-flush.h"
#include "exec/exec-all.h"
void tb_flush(CPUState *cpu)
diff --git a/accel/tcg/tb-maint.c b/accel/tcg/tb-maint.c
index b3d6529ae2..97e06c453e 100644
--- a/accel/tcg/tb-maint.c
+++ b/accel/tcg/tb-maint.c
@@ -22,6 +22,7 @@
#include "exec/cputlb.h"
#include "exec/log.h"
#include "exec/exec-all.h"
+#include "exec/tb-flush.h"
#include "exec/translate-all.h"
#include "sysemu/tcg.h"
#include "tcg/tcg.h"
diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c
index 9e925c10f3..2e9d430098 100644
--- a/accel/tcg/translate-all.c
+++ b/accel/tcg/translate-all.c
@@ -47,6 +47,7 @@
#include "exec/cputlb.h"
#include "exec/translate-all.h"
#include "exec/translator.h"
+#include "exec/tb-flush.h"
#include "qemu/bitmap.h"
#include "qemu/qemu-print.h"
#include "qemu/timer.h"
diff --git a/cpu.c b/cpu.c
index 21cf809614..ef21a55a23 100644
--- a/cpu.c
+++ b/cpu.c
@@ -36,6 +36,7 @@
#include "sysemu/replay.h"
#include "exec/cpu-common.h"
#include "exec/exec-all.h"
+#include "exec/tb-flush.h"
#include "exec/translate-all.h"
#include "exec/log.h"
#include "hw/core/accel-cpu.h"
diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c
index f419425cb0..d8bf90361e 100644
--- a/gdbstub/gdbstub.c
+++ b/gdbstub/gdbstub.c
@@ -46,6 +46,7 @@
#include "sysemu/runstate.h"
#include "semihosting/semihost.h"
#include "exec/exec-all.h"
+#include "exec/tb-flush.h"
#include "exec/hwaddr.h"
#include "sysemu/replay.h"
diff --git a/hw/ppc/spapr_hcall.c b/hw/ppc/spapr_hcall.c
index 925ff523cc..ec4def62f8 100644
--- a/hw/ppc/spapr_hcall.c
+++ b/hw/ppc/spapr_hcall.c
@@ -8,6 +8,7 @@
#include "qemu/module.h"
#include "qemu/error-report.h"
#include "exec/exec-all.h"
+#include "exec/tb-flush.h"
#include "helper_regs.h"
#include "hw/ppc/ppc.h"
#include "hw/ppc/spapr.h"
diff --git a/plugins/core.c b/plugins/core.c
index e04ffa1ba4..04632886b9 100644
--- a/plugins/core.c
+++ b/plugins/core.c
@@ -24,6 +24,7 @@
#include "exec/cpu-common.h"
#include "exec/exec-all.h"
+#include "exec/tb-flush.h"
#include "exec/helper-proto.h"
#include "tcg/tcg.h"
#include "tcg/tcg-op.h"
diff --git a/plugins/loader.c b/plugins/loader.c
index 88c30bde2d..809f3f9b13 100644
--- a/plugins/loader.c
+++ b/plugins/loader.c
@@ -29,7 +29,7 @@
#include "qemu/plugin.h"
#include "qemu/memalign.h"
#include "hw/core/cpu.h"
-#include "exec/exec-all.h"
+#include "exec/tb-flush.h"
#ifndef CONFIG_USER_ONLY
#include "hw/boards.h"
#endif
diff --git a/target/alpha/sys_helper.c b/target/alpha/sys_helper.c
index 25f6cb8894..c83c92dd4c 100644
--- a/target/alpha/sys_helper.c
+++ b/target/alpha/sys_helper.c
@@ -20,6 +20,7 @@
#include "qemu/osdep.h"
#include "cpu.h"
#include "exec/exec-all.h"
+#include "exec/tb-flush.h"
#include "exec/helper-proto.h"
#include "sysemu/runstate.h"
#include "sysemu/sysemu.h"
diff --git a/target/riscv/csr.c b/target/riscv/csr.c
index fa17d7770c..750b683c55 100644
--- a/target/riscv/csr.c
+++ b/target/riscv/csr.c
@@ -25,6 +25,7 @@
#include "time_helper.h"
#include "qemu/main-loop.h"
#include "exec/exec-all.h"
+#include "exec/tb-flush.h"
#include "sysemu/cpu-timers.h"
#include "qemu/guest-random.h"
#include "qapi/error.h"
--
2.39.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v3 07/24] gdbstub: move fromhex/tohex routines to internals
2023-02-21 22:52 [PATCH v3 00/24] gdbstub: re-organise to for better compilation behaviour Alex Bennée
` (5 preceding siblings ...)
2023-02-21 22:52 ` [PATCH v3 06/24] includes: move tb_flush into its own header Alex Bennée
@ 2023-02-21 22:52 ` Alex Bennée
2023-02-21 22:52 ` [PATCH v3 08/24] gdbstub: make various helpers visible to the rest of the module Alex Bennée
` (16 subsequent siblings)
23 siblings, 0 replies; 32+ messages in thread
From: Alex Bennée @ 2023-02-21 22:52 UTC (permalink / raw)
To: qemu-devel
Cc: Thomas Huth, qemu-arm, qemu-riscv, qemu-s390x, Yoshinori Sato,
nicolas.eder, Stafford Horne, Daniel Henrique Barboza,
Mahmoud Mandour, Taylor Simpson, mads, Marek Vasut,
Artyom Tarasenko, Alistair Francis, qemu-ppc, Yanan Wang,
Sunil Muthuswamy, Cédric Le Goater, Eduardo Habkost,
Bin Meng, Bastian Koppelmann, Palmer Dabbelt, Marcel Apfelbaum,
Laurent Vivier, Philippe Mathieu-Daudé, Michael Rolnik,
Aleksandar Rikalo, Paolo Bonzini, Alex Bennée,
Aurelien Jarno, Xiaojuan Yang, Richard Henderson, Peter Maydell,
Alexandre Iooss, Chris Wulff, Jiaxun Yang, David Gibson,
Edgar E. Iglesias, Greg Kurz, David Hildenbrand, Song Gao,
Ilya Leoshkevich, Max Filippov, Mark Cave-Ayland
These will be needed from multiple places in the code. They are
declared as inline so move to the header and fix up to modern coding
style.
The only other place that messes with hex stuff at the moment is the
URI handling in utils but that would be more code churn so leave for
now.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
gdbstub/internals.h | 27 +++++++++++++++++++++++++++
gdbstub/gdbstub.c | 20 --------------------
2 files changed, 27 insertions(+), 20 deletions(-)
diff --git a/gdbstub/internals.h b/gdbstub/internals.h
index de56328a2c..6be05fac9f 100644
--- a/gdbstub/internals.h
+++ b/gdbstub/internals.h
@@ -55,6 +55,33 @@ typedef struct GDBState {
int supported_sstep_flags;
} GDBState;
+
+/*
+ * Inline utility function, convert from int to hex and back
+ */
+
+static inline int fromhex(int v)
+{
+ if (v >= '0' && v <= '9') {
+ return v - '0';
+ } else if (v >= 'A' && v <= 'F') {
+ return v - 'A' + 10;
+ } else if (v >= 'a' && v <= 'f') {
+ return v - 'a' + 10;
+ } else {
+ return 0;
+ }
+}
+
+static inline int tohex(int v)
+{
+ if (v < 10) {
+ return v + '0';
+ } else {
+ return v - 10 + 'a';
+ }
+}
+
/*
* Break/Watch point support - there is an implementation for softmmu
* and user mode.
diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c
index d8bf90361e..4407706aa3 100644
--- a/gdbstub/gdbstub.c
+++ b/gdbstub/gdbstub.c
@@ -546,26 +546,6 @@ static void put_buffer(const uint8_t *buf, int len)
#endif
}
-static inline int fromhex(int v)
-{
- if (v >= '0' && v <= '9')
- return v - '0';
- else if (v >= 'A' && v <= 'F')
- return v - 'A' + 10;
- else if (v >= 'a' && v <= 'f')
- return v - 'a' + 10;
- else
- return 0;
-}
-
-static inline int tohex(int v)
-{
- if (v < 10)
- return v + '0';
- else
- return v - 10 + 'a';
-}
-
/* writes 2*len+1 bytes in buf */
static void memtohex(GString *buf, const uint8_t *mem, int len)
{
--
2.39.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v3 08/24] gdbstub: make various helpers visible to the rest of the module
2023-02-21 22:52 [PATCH v3 00/24] gdbstub: re-organise to for better compilation behaviour Alex Bennée
` (6 preceding siblings ...)
2023-02-21 22:52 ` [PATCH v3 07/24] gdbstub: move fromhex/tohex routines to internals Alex Bennée
@ 2023-02-21 22:52 ` Alex Bennée
2023-02-21 22:52 ` [PATCH v3 09/24] gdbstub: move chunk of softmmu functionality to own file Alex Bennée
` (15 subsequent siblings)
23 siblings, 0 replies; 32+ messages in thread
From: Alex Bennée @ 2023-02-21 22:52 UTC (permalink / raw)
To: qemu-devel
Cc: Thomas Huth, qemu-arm, qemu-riscv, qemu-s390x, Yoshinori Sato,
nicolas.eder, Stafford Horne, Daniel Henrique Barboza,
Mahmoud Mandour, Taylor Simpson, mads, Marek Vasut,
Artyom Tarasenko, Alistair Francis, qemu-ppc, Yanan Wang,
Sunil Muthuswamy, Cédric Le Goater, Eduardo Habkost,
Bin Meng, Bastian Koppelmann, Palmer Dabbelt, Marcel Apfelbaum,
Laurent Vivier, Philippe Mathieu-Daudé, Michael Rolnik,
Aleksandar Rikalo, Paolo Bonzini, Alex Bennée,
Aurelien Jarno, Xiaojuan Yang, Richard Henderson, Peter Maydell,
Alexandre Iooss, Chris Wulff, Jiaxun Yang, David Gibson,
Edgar E. Iglesias, Greg Kurz, David Hildenbrand, Song Gao,
Ilya Leoshkevich, Max Filippov, Mark Cave-Ayland
We will be needing to use these helpers between the user and softmmu
files so declare them in the headers, add a system prefix and remove
static from the implementations.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
gdbstub/internals.h | 25 ++++
gdbstub/gdbstub.c | 271 ++++++++++++++++++++++----------------------
2 files changed, 161 insertions(+), 135 deletions(-)
diff --git a/gdbstub/internals.h b/gdbstub/internals.h
index 6be05fac9f..73e454edfe 100644
--- a/gdbstub/internals.h
+++ b/gdbstub/internals.h
@@ -82,6 +82,31 @@ static inline int tohex(int v)
}
}
+/*
+ * Connection helpers for both softmmu and user backends
+ */
+
+void gdb_put_strbuf(void);
+int gdb_put_packet(const char *buf);
+int gdb_put_packet_binary(const char *buf, int len, bool dump);
+void gdb_hextomem(GByteArray *mem, const char *buf, int len);
+void gdb_memtohex(GString *buf, const uint8_t *mem, int len);
+void gdb_memtox(GString *buf, const char *mem, int len);
+void gdb_read_byte(uint8_t ch);
+
+/* utility helpers */
+CPUState *gdb_first_attached_cpu(void);
+void gdb_append_thread_id(CPUState *cpu, GString *buf);
+int gdb_get_cpu_index(CPUState *cpu);
+
+void gdb_init_gdbserver_state(void);
+void gdb_create_default_process(GDBState *s);
+
+/*
+ * Helpers with separate softmmu and user implementations
+ */
+void gdb_put_buffer(const uint8_t *buf, int len);
+
/*
* Break/Watch point support - there is an implementation for softmmu
* and user mode.
diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c
index 4407706aa3..41414d89bc 100644
--- a/gdbstub/gdbstub.c
+++ b/gdbstub/gdbstub.c
@@ -85,12 +85,13 @@ static inline int target_memory_rw_debug(CPUState *cpu, target_ulong addr,
return cpu_memory_rw_debug(cpu, addr, buf, len, is_write);
}
-/* Return the GDB index for a given vCPU state.
+/*
+ * Return the GDB index for a given vCPU state.
*
* For user mode this is simply the thread id. In system mode GDB
* numbers CPUs from 1 as 0 is reserved as an "any cpu" index.
*/
-static inline int cpu_gdb_index(CPUState *cpu)
+int gdb_get_cpu_index(CPUState *cpu)
{
#if defined(CONFIG_USER_ONLY)
TaskState *ts = (TaskState *) cpu->opaque;
@@ -342,7 +343,7 @@ static GDBSystemState gdbserver_system_state;
static GDBState gdbserver_state;
-static void init_gdbserver_state(void)
+void gdb_init_gdbserver_state(void)
{
g_assert(!gdbserver_state.init);
memset(&gdbserver_state, 0, sizeof(GDBState));
@@ -524,7 +525,7 @@ static int gdb_continue_partial(char *newstates)
return res;
}
-static void put_buffer(const uint8_t *buf, int len)
+void gdb_put_buffer(const uint8_t *buf, int len)
{
#ifdef CONFIG_USER_ONLY
int ret;
@@ -547,7 +548,7 @@ static void put_buffer(const uint8_t *buf, int len)
}
/* writes 2*len+1 bytes in buf */
-static void memtohex(GString *buf, const uint8_t *mem, int len)
+void gdb_memtohex(GString *buf, const uint8_t *mem, int len)
{
int i, c;
for(i = 0; i < len; i++) {
@@ -558,7 +559,7 @@ static void memtohex(GString *buf, const uint8_t *mem, int len)
g_string_append_c(buf, '\0');
}
-static void hextomem(GByteArray *mem, const char *buf, int len)
+void gdb_hextomem(GByteArray *mem, const char *buf, int len)
{
int i;
@@ -603,7 +604,7 @@ static void hexdump(const char *buf, int len,
}
/* return -1 if error, 0 if OK */
-static int put_packet_binary(const char *buf, int len, bool dump)
+int gdb_put_packet_binary(const char *buf, int len, bool dump)
{
int csum, i;
uint8_t footer[3];
@@ -627,7 +628,7 @@ static int put_packet_binary(const char *buf, int len, bool dump)
footer[2] = tohex((csum) & 0xf);
g_byte_array_append(gdbserver_state.last_packet, footer, 3);
- put_buffer(gdbserver_state.last_packet->data,
+ gdb_put_buffer(gdbserver_state.last_packet->data,
gdbserver_state.last_packet->len);
#ifdef CONFIG_USER_ONLY
@@ -644,20 +645,20 @@ static int put_packet_binary(const char *buf, int len, bool dump)
}
/* return -1 if error, 0 if OK */
-static int put_packet(const char *buf)
+int gdb_put_packet(const char *buf)
{
trace_gdbstub_io_reply(buf);
- return put_packet_binary(buf, strlen(buf), false);
+ return gdb_put_packet_binary(buf, strlen(buf), false);
}
-static void put_strbuf(void)
+void gdb_put_strbuf(void)
{
- put_packet(gdbserver_state.str_buf->str);
+ gdb_put_packet(gdbserver_state.str_buf->str);
}
/* Encode data using the encoding for 'x' packets. */
-static void memtox(GString *buf, const char *mem, int len)
+void gdb_memtox(GString *buf, const char *mem, int len)
{
char c;
@@ -714,7 +715,7 @@ static CPUState *find_cpu(uint32_t thread_id)
CPUState *cpu;
CPU_FOREACH(cpu) {
- if (cpu_gdb_index(cpu) == thread_id) {
+ if (gdb_get_cpu_index(cpu) == thread_id) {
return cpu;
}
}
@@ -768,7 +769,7 @@ static CPUState *gdb_next_attached_cpu(CPUState *cpu)
}
/* Return the first attached cpu */
-static CPUState *gdb_first_attached_cpu(void)
+CPUState *gdb_first_attached_cpu(void)
{
CPUState *cpu = first_cpu;
GDBProcess *process = gdb_get_cpu_process(cpu);
@@ -982,13 +983,13 @@ static void gdb_set_cpu_pc(target_ulong pc)
cpu_set_pc(cpu, pc);
}
-static void gdb_append_thread_id(CPUState *cpu, GString *buf)
+void gdb_append_thread_id(CPUState *cpu, GString *buf)
{
if (gdbserver_state.multiprocess) {
g_string_append_printf(buf, "p%02x.%02x",
- gdb_get_cpu_pid(cpu), cpu_gdb_index(cpu));
+ gdb_get_cpu_pid(cpu), gdb_get_cpu_index(cpu));
} else {
- g_string_append_printf(buf, "%02x", cpu_gdb_index(cpu));
+ g_string_append_printf(buf, "%02x", gdb_get_cpu_index(cpu));
}
}
@@ -1359,7 +1360,7 @@ static void run_cmd_parser(const char *data, const GdbCmdParseEntry *cmd)
/* In case there was an error during the command parsing we must
* send a NULL packet to indicate the command is not supported */
if (process_string_cmd(NULL, data, cmd, 1)) {
- put_packet("");
+ gdb_put_packet("");
}
}
@@ -1370,7 +1371,7 @@ static void handle_detach(GArray *params, void *user_ctx)
if (gdbserver_state.multiprocess) {
if (!params->len) {
- put_packet("E22");
+ gdb_put_packet("E22");
return;
}
@@ -1394,7 +1395,7 @@ static void handle_detach(GArray *params, void *user_ctx)
gdb_syscall_mode = GDB_SYS_DISABLED;
gdb_continue();
}
- put_packet("OK");
+ gdb_put_packet("OK");
}
static void handle_thread_alive(GArray *params, void *user_ctx)
@@ -1402,23 +1403,23 @@ static void handle_thread_alive(GArray *params, void *user_ctx)
CPUState *cpu;
if (!params->len) {
- put_packet("E22");
+ gdb_put_packet("E22");
return;
}
if (get_param(params, 0)->thread_id.kind == GDB_READ_THREAD_ERR) {
- put_packet("E22");
+ gdb_put_packet("E22");
return;
}
cpu = gdb_get_cpu(get_param(params, 0)->thread_id.pid,
get_param(params, 0)->thread_id.tid);
if (!cpu) {
- put_packet("E22");
+ gdb_put_packet("E22");
return;
}
- put_packet("OK");
+ gdb_put_packet("OK");
}
static void handle_continue(GArray *params, void *user_ctx)
@@ -1455,24 +1456,24 @@ static void handle_set_thread(GArray *params, void *user_ctx)
CPUState *cpu;
if (params->len != 2) {
- put_packet("E22");
+ gdb_put_packet("E22");
return;
}
if (get_param(params, 1)->thread_id.kind == GDB_READ_THREAD_ERR) {
- put_packet("E22");
+ gdb_put_packet("E22");
return;
}
if (get_param(params, 1)->thread_id.kind != GDB_ONE_THREAD) {
- put_packet("OK");
+ gdb_put_packet("OK");
return;
}
cpu = gdb_get_cpu(get_param(params, 1)->thread_id.pid,
get_param(params, 1)->thread_id.tid);
if (!cpu) {
- put_packet("E22");
+ gdb_put_packet("E22");
return;
}
@@ -1483,14 +1484,14 @@ static void handle_set_thread(GArray *params, void *user_ctx)
switch (get_param(params, 0)->opcode) {
case 'c':
gdbserver_state.c_cpu = cpu;
- put_packet("OK");
+ gdb_put_packet("OK");
break;
case 'g':
gdbserver_state.g_cpu = cpu;
- put_packet("OK");
+ gdb_put_packet("OK");
break;
default:
- put_packet("E22");
+ gdb_put_packet("E22");
break;
}
}
@@ -1500,7 +1501,7 @@ static void handle_insert_bp(GArray *params, void *user_ctx)
int res;
if (params->len != 3) {
- put_packet("E22");
+ gdb_put_packet("E22");
return;
}
@@ -1509,14 +1510,14 @@ static void handle_insert_bp(GArray *params, void *user_ctx)
get_param(params, 1)->val_ull,
get_param(params, 2)->val_ull);
if (res >= 0) {
- put_packet("OK");
+ gdb_put_packet("OK");
return;
} else if (res == -ENOSYS) {
- put_packet("");
+ gdb_put_packet("");
return;
}
- put_packet("E22");
+ gdb_put_packet("E22");
}
static void handle_remove_bp(GArray *params, void *user_ctx)
@@ -1524,7 +1525,7 @@ static void handle_remove_bp(GArray *params, void *user_ctx)
int res;
if (params->len != 3) {
- put_packet("E22");
+ gdb_put_packet("E22");
return;
}
@@ -1533,14 +1534,14 @@ static void handle_remove_bp(GArray *params, void *user_ctx)
get_param(params, 1)->val_ull,
get_param(params, 2)->val_ull);
if (res >= 0) {
- put_packet("OK");
+ gdb_put_packet("OK");
return;
} else if (res == -ENOSYS) {
- put_packet("");
+ gdb_put_packet("");
return;
}
- put_packet("E22");
+ gdb_put_packet("E22");
}
/*
@@ -1559,20 +1560,20 @@ static void handle_set_reg(GArray *params, void *user_ctx)
int reg_size;
if (!gdb_has_xml) {
- put_packet("");
+ gdb_put_packet("");
return;
}
if (params->len != 2) {
- put_packet("E22");
+ gdb_put_packet("E22");
return;
}
reg_size = strlen(get_param(params, 1)->data) / 2;
- hextomem(gdbserver_state.mem_buf, get_param(params, 1)->data, reg_size);
+ gdb_hextomem(gdbserver_state.mem_buf, get_param(params, 1)->data, reg_size);
gdb_write_register(gdbserver_state.g_cpu, gdbserver_state.mem_buf->data,
get_param(params, 0)->val_ull);
- put_packet("OK");
+ gdb_put_packet("OK");
}
static void handle_get_reg(GArray *params, void *user_ctx)
@@ -1580,12 +1581,12 @@ static void handle_get_reg(GArray *params, void *user_ctx)
int reg_size;
if (!gdb_has_xml) {
- put_packet("");
+ gdb_put_packet("");
return;
}
if (!params->len) {
- put_packet("E14");
+ gdb_put_packet("E14");
return;
}
@@ -1593,53 +1594,53 @@ static void handle_get_reg(GArray *params, void *user_ctx)
gdbserver_state.mem_buf,
get_param(params, 0)->val_ull);
if (!reg_size) {
- put_packet("E14");
+ gdb_put_packet("E14");
return;
} else {
g_byte_array_set_size(gdbserver_state.mem_buf, reg_size);
}
- memtohex(gdbserver_state.str_buf, gdbserver_state.mem_buf->data, reg_size);
- put_strbuf();
+ gdb_memtohex(gdbserver_state.str_buf, gdbserver_state.mem_buf->data, reg_size);
+ gdb_put_strbuf();
}
static void handle_write_mem(GArray *params, void *user_ctx)
{
if (params->len != 3) {
- put_packet("E22");
+ gdb_put_packet("E22");
return;
}
- /* hextomem() reads 2*len bytes */
+ /* gdb_hextomem() reads 2*len bytes */
if (get_param(params, 1)->val_ull >
strlen(get_param(params, 2)->data) / 2) {
- put_packet("E22");
+ gdb_put_packet("E22");
return;
}
- hextomem(gdbserver_state.mem_buf, get_param(params, 2)->data,
+ gdb_hextomem(gdbserver_state.mem_buf, get_param(params, 2)->data,
get_param(params, 1)->val_ull);
if (target_memory_rw_debug(gdbserver_state.g_cpu,
get_param(params, 0)->val_ull,
gdbserver_state.mem_buf->data,
gdbserver_state.mem_buf->len, true)) {
- put_packet("E14");
+ gdb_put_packet("E14");
return;
}
- put_packet("OK");
+ gdb_put_packet("OK");
}
static void handle_read_mem(GArray *params, void *user_ctx)
{
if (params->len != 2) {
- put_packet("E22");
+ gdb_put_packet("E22");
return;
}
- /* memtohex() doubles the required space */
+ /* gdb_memtohex() doubles the required space */
if (get_param(params, 1)->val_ull > MAX_PACKET_LENGTH / 2) {
- put_packet("E22");
+ gdb_put_packet("E22");
return;
}
@@ -1650,13 +1651,13 @@ static void handle_read_mem(GArray *params, void *user_ctx)
get_param(params, 0)->val_ull,
gdbserver_state.mem_buf->data,
gdbserver_state.mem_buf->len, false)) {
- put_packet("E14");
+ gdb_put_packet("E14");
return;
}
- memtohex(gdbserver_state.str_buf, gdbserver_state.mem_buf->data,
+ gdb_memtohex(gdbserver_state.str_buf, gdbserver_state.mem_buf->data,
gdbserver_state.mem_buf->len);
- put_strbuf();
+ gdb_put_strbuf();
}
static void handle_write_all_regs(GArray *params, void *user_ctx)
@@ -1671,7 +1672,7 @@ static void handle_write_all_regs(GArray *params, void *user_ctx)
cpu_synchronize_state(gdbserver_state.g_cpu);
len = strlen(get_param(params, 0)->data) / 2;
- hextomem(gdbserver_state.mem_buf, get_param(params, 0)->data, len);
+ gdb_hextomem(gdbserver_state.mem_buf, get_param(params, 0)->data, len);
registers = gdbserver_state.mem_buf->data;
for (addr = 0; addr < gdbserver_state.g_cpu->gdb_num_g_regs && len > 0;
addr++) {
@@ -1679,7 +1680,7 @@ static void handle_write_all_regs(GArray *params, void *user_ctx)
len -= reg_size;
registers += reg_size;
}
- put_packet("OK");
+ gdb_put_packet("OK");
}
static void handle_read_all_regs(GArray *params, void *user_ctx)
@@ -1696,8 +1697,8 @@ static void handle_read_all_regs(GArray *params, void *user_ctx)
}
g_assert(len == gdbserver_state.mem_buf->len);
- memtohex(gdbserver_state.str_buf, gdbserver_state.mem_buf->data, len);
- put_strbuf();
+ gdb_memtohex(gdbserver_state.str_buf, gdbserver_state.mem_buf->data, len);
+ gdb_put_strbuf();
}
static void handle_file_io(GArray *params, void *user_ctx)
@@ -1748,7 +1749,7 @@ static void handle_file_io(GArray *params, void *user_ctx)
}
if (params->len >= 3 && get_param(params, 2)->opcode == (uint8_t)'C') {
- put_packet("T02");
+ gdb_put_packet("T02");
return;
}
@@ -1768,7 +1769,7 @@ static void handle_step(GArray *params, void *user_ctx)
static void handle_backward(GArray *params, void *user_ctx)
{
if (!stub_can_reverse()) {
- put_packet("E22");
+ gdb_put_packet("E22");
}
if (params->len == 1) {
switch (get_param(params, 0)->opcode) {
@@ -1776,26 +1777,26 @@ static void handle_backward(GArray *params, void *user_ctx)
if (replay_reverse_step()) {
gdb_continue();
} else {
- put_packet("E14");
+ gdb_put_packet("E14");
}
return;
case 'c':
if (replay_reverse_continue()) {
gdb_continue();
} else {
- put_packet("E14");
+ gdb_put_packet("E14");
}
return;
}
}
/* Default invalid command */
- put_packet("");
+ gdb_put_packet("");
}
static void handle_v_cont_query(GArray *params, void *user_ctx)
{
- put_packet("vCont;c;C;s;S");
+ gdb_put_packet("vCont;c;C;s;S");
}
static void handle_v_cont(GArray *params, void *user_ctx)
@@ -1808,9 +1809,9 @@ static void handle_v_cont(GArray *params, void *user_ctx)
res = gdb_handle_vcont(get_param(params, 0)->data);
if ((res == -EINVAL) || (res == -ERANGE)) {
- put_packet("E22");
+ gdb_put_packet("E22");
} else if (res) {
- put_packet("");
+ gdb_put_packet("");
}
}
@@ -1842,13 +1843,13 @@ static void handle_v_attach(GArray *params, void *user_ctx)
gdb_append_thread_id(cpu, gdbserver_state.str_buf);
g_string_append_c(gdbserver_state.str_buf, ';');
cleanup:
- put_strbuf();
+ gdb_put_strbuf();
}
static void handle_v_kill(GArray *params, void *user_ctx)
{
/* Kill the target */
- put_packet("OK");
+ gdb_put_packet("OK");
error_report("QEMU: Terminated via GDBstub");
gdb_exit(0);
exit(0);
@@ -1889,7 +1890,7 @@ static void handle_v_commands(GArray *params, void *user_ctx)
if (process_string_cmd(NULL, get_param(params, 0)->data,
gdb_v_commands_table,
ARRAY_SIZE(gdb_v_commands_table))) {
- put_packet("");
+ gdb_put_packet("");
}
}
@@ -1907,7 +1908,7 @@ static void handle_query_qemu_sstepbits(GArray *params, void *user_ctx)
SSTEP_NOTIMER);
}
- put_strbuf();
+ gdb_put_strbuf();
}
static void handle_set_qemu_sstep(GArray *params, void *user_ctx)
@@ -1921,19 +1922,19 @@ static void handle_set_qemu_sstep(GArray *params, void *user_ctx)
new_sstep_flags = get_param(params, 0)->val_ul;
if (new_sstep_flags & ~gdbserver_state.supported_sstep_flags) {
- put_packet("E22");
+ gdb_put_packet("E22");
return;
}
gdbserver_state.sstep_flags = new_sstep_flags;
- put_packet("OK");
+ gdb_put_packet("OK");
}
static void handle_query_qemu_sstep(GArray *params, void *user_ctx)
{
g_string_printf(gdbserver_state.str_buf, "0x%x",
gdbserver_state.sstep_flags);
- put_strbuf();
+ gdb_put_strbuf();
}
static void handle_query_curr_tid(GArray *params, void *user_ctx)
@@ -1950,19 +1951,19 @@ static void handle_query_curr_tid(GArray *params, void *user_ctx)
cpu = get_first_cpu_in_process(process);
g_string_assign(gdbserver_state.str_buf, "QC");
gdb_append_thread_id(cpu, gdbserver_state.str_buf);
- put_strbuf();
+ gdb_put_strbuf();
}
static void handle_query_threads(GArray *params, void *user_ctx)
{
if (!gdbserver_state.query_cpu) {
- put_packet("l");
+ gdb_put_packet("l");
return;
}
g_string_assign(gdbserver_state.str_buf, "m");
gdb_append_thread_id(gdbserver_state.query_cpu, gdbserver_state.str_buf);
- put_strbuf();
+ gdb_put_strbuf();
gdbserver_state.query_cpu = gdb_next_attached_cpu(gdbserver_state.query_cpu);
}
@@ -1979,7 +1980,7 @@ static void handle_query_thread_extra(GArray *params, void *user_ctx)
if (!params->len ||
get_param(params, 0)->thread_id.kind == GDB_READ_THREAD_ERR) {
- put_packet("E22");
+ gdb_put_packet("E22");
return;
}
@@ -2004,8 +2005,8 @@ static void handle_query_thread_extra(GArray *params, void *user_ctx)
cpu->halted ? "halted " : "running");
}
trace_gdbstub_op_extra_info(rs->str);
- memtohex(gdbserver_state.str_buf, (uint8_t *)rs->str, rs->len);
- put_strbuf();
+ gdb_memtohex(gdbserver_state.str_buf, (uint8_t *)rs->str, rs->len);
+ gdb_put_strbuf();
}
#ifdef CONFIG_USER_ONLY
@@ -2021,7 +2022,7 @@ static void handle_query_offsets(GArray *params, void *user_ctx)
ts->info->code_offset,
ts->info->data_offset,
ts->info->data_offset);
- put_strbuf();
+ gdb_put_strbuf();
}
#else
static void handle_query_rcmd(GArray *params, void *user_ctx)
@@ -2030,24 +2031,24 @@ static void handle_query_rcmd(GArray *params, void *user_ctx)
int len;
if (!params->len) {
- put_packet("E22");
+ gdb_put_packet("E22");
return;
}
len = strlen(get_param(params, 0)->data);
if (len % 2) {
- put_packet("E01");
+ gdb_put_packet("E01");
return;
}
g_assert(gdbserver_state.mem_buf->len == 0);
len = len / 2;
- hextomem(gdbserver_state.mem_buf, get_param(params, 0)->data, len);
+ gdb_hextomem(gdbserver_state.mem_buf, get_param(params, 0)->data, len);
g_byte_array_append(gdbserver_state.mem_buf, &zero, 1);
qemu_chr_be_write(gdbserver_system_state.mon_chr,
gdbserver_state.mem_buf->data,
gdbserver_state.mem_buf->len);
- put_packet("OK");
+ gdb_put_packet("OK");
}
#endif
@@ -2078,7 +2079,7 @@ static void handle_query_supported(GArray *params, void *user_ctx)
}
g_string_append(gdbserver_state.str_buf, ";vContSupported+;multiprocess+");
- put_strbuf();
+ gdb_put_strbuf();
}
static void handle_query_xfer_features(GArray *params, void *user_ctx)
@@ -2090,14 +2091,14 @@ static void handle_query_xfer_features(GArray *params, void *user_ctx)
const char *p;
if (params->len < 3) {
- put_packet("E22");
+ gdb_put_packet("E22");
return;
}
process = gdb_get_cpu_process(gdbserver_state.g_cpu);
cc = CPU_GET_CLASS(gdbserver_state.g_cpu);
if (!cc->gdb_core_xml_file) {
- put_packet("");
+ gdb_put_packet("");
return;
}
@@ -2105,7 +2106,7 @@ static void handle_query_xfer_features(GArray *params, void *user_ctx)
p = get_param(params, 0)->data;
xml = get_feature_xml(p, &p, process);
if (!xml) {
- put_packet("E00");
+ gdb_put_packet("E00");
return;
}
@@ -2113,7 +2114,7 @@ static void handle_query_xfer_features(GArray *params, void *user_ctx)
len = get_param(params, 2)->val_ul;
total_len = strlen(xml);
if (addr > total_len) {
- put_packet("E00");
+ gdb_put_packet("E00");
return;
}
@@ -2123,13 +2124,13 @@ static void handle_query_xfer_features(GArray *params, void *user_ctx)
if (len < total_len - addr) {
g_string_assign(gdbserver_state.str_buf, "m");
- memtox(gdbserver_state.str_buf, xml + addr, len);
+ gdb_memtox(gdbserver_state.str_buf, xml + addr, len);
} else {
g_string_assign(gdbserver_state.str_buf, "l");
- memtox(gdbserver_state.str_buf, xml + addr, total_len - addr);
+ gdb_memtox(gdbserver_state.str_buf, xml + addr, total_len - addr);
}
- put_packet_binary(gdbserver_state.str_buf->str,
+ gdb_put_packet_binary(gdbserver_state.str_buf->str,
gdbserver_state.str_buf->len, true);
}
@@ -2140,7 +2141,7 @@ static void handle_query_xfer_auxv(GArray *params, void *user_ctx)
unsigned long offset, len, saved_auxv, auxv_len;
if (params->len < 2) {
- put_packet("E22");
+ gdb_put_packet("E22");
return;
}
@@ -2151,7 +2152,7 @@ static void handle_query_xfer_auxv(GArray *params, void *user_ctx)
auxv_len = ts->info->auxv_len;
if (offset >= auxv_len) {
- put_packet("E00");
+ gdb_put_packet("E00");
return;
}
@@ -2169,20 +2170,20 @@ static void handle_query_xfer_auxv(GArray *params, void *user_ctx)
g_byte_array_set_size(gdbserver_state.mem_buf, len);
if (target_memory_rw_debug(gdbserver_state.g_cpu, saved_auxv + offset,
gdbserver_state.mem_buf->data, len, false)) {
- put_packet("E14");
+ gdb_put_packet("E14");
return;
}
- memtox(gdbserver_state.str_buf,
- (const char *)gdbserver_state.mem_buf->data, len);
- put_packet_binary(gdbserver_state.str_buf->str,
- gdbserver_state.str_buf->len, true);
+ gdb_memtox(gdbserver_state.str_buf,
+ (const char *)gdbserver_state.mem_buf->data, len);
+ gdb_put_packet_binary(gdbserver_state.str_buf->str,
+ gdbserver_state.str_buf->len, true);
}
#endif
static void handle_query_attached(GArray *params, void *user_ctx)
{
- put_packet(GDB_ATTACHED);
+ gdb_put_packet(GDB_ATTACHED);
}
static void handle_query_qemu_supported(GArray *params, void *user_ctx)
@@ -2191,7 +2192,7 @@ static void handle_query_qemu_supported(GArray *params, void *user_ctx)
#ifndef CONFIG_USER_ONLY
g_string_append(gdbserver_state.str_buf, ";PhyMemMode");
#endif
- put_strbuf();
+ gdb_put_strbuf();
}
#ifndef CONFIG_USER_ONLY
@@ -2199,13 +2200,13 @@ static void handle_query_qemu_phy_mem_mode(GArray *params,
void *user_ctx)
{
g_string_printf(gdbserver_state.str_buf, "%d", phy_memory_mode);
- put_strbuf();
+ gdb_put_strbuf();
}
static void handle_set_qemu_phy_mem_mode(GArray *params, void *user_ctx)
{
if (!params->len) {
- put_packet("E22");
+ gdb_put_packet("E22");
return;
}
@@ -2214,7 +2215,7 @@ static void handle_set_qemu_phy_mem_mode(GArray *params, void *user_ctx)
} else {
phy_memory_mode = 1;
}
- put_packet("OK");
+ gdb_put_packet("OK");
}
#endif
@@ -2347,7 +2348,7 @@ static void handle_gen_query(GArray *params, void *user_ctx)
if (process_string_cmd(NULL, get_param(params, 0)->data,
gdb_gen_query_table,
ARRAY_SIZE(gdb_gen_query_table))) {
- put_packet("");
+ gdb_put_packet("");
}
}
@@ -2366,7 +2367,7 @@ static void handle_gen_set(GArray *params, void *user_ctx)
if (process_string_cmd(NULL, get_param(params, 0)->data,
gdb_gen_set_table,
ARRAY_SIZE(gdb_gen_set_table))) {
- put_packet("");
+ gdb_put_packet("");
}
}
@@ -2375,7 +2376,7 @@ static void handle_target_halt(GArray *params, void *user_ctx)
g_string_printf(gdbserver_state.str_buf, "T%02xthread:", GDB_SIGNAL_TRAP);
gdb_append_thread_id(gdbserver_state.c_cpu, gdbserver_state.str_buf);
g_string_append_c(gdbserver_state.str_buf, ';');
- put_strbuf();
+ gdb_put_strbuf();
/*
* Remove all the breakpoints when this query is issued,
* because gdb is doing an initial connect and the state
@@ -2392,7 +2393,7 @@ static int gdb_handle_packet(const char *line_buf)
switch (line_buf[0]) {
case '!':
- put_packet("OK");
+ gdb_put_packet("OK");
break;
case '?':
{
@@ -2619,7 +2620,7 @@ static int gdb_handle_packet(const char *line_buf)
break;
default:
/* put empty packet */
- put_packet("");
+ gdb_put_packet("");
break;
}
@@ -2660,7 +2661,7 @@ static void gdb_vm_state_change(void *opaque, bool running, RunState state)
}
/* Is there a GDB syscall waiting to be sent? */
if (gdbserver_state.current_syscall_cb) {
- put_packet(gdbserver_state.syscall_buf);
+ gdb_put_packet(gdbserver_state.syscall_buf);
return;
}
@@ -2685,7 +2686,7 @@ static void gdb_vm_state_change(void *opaque, bool running, RunState state)
type = "";
break;
}
- trace_gdbstub_hit_watchpoint(type, cpu_gdb_index(cpu),
+ trace_gdbstub_hit_watchpoint(type, gdb_get_cpu_index(cpu),
(target_ulong)cpu->watchpoint_hit->vaddr);
g_string_printf(buf, "T%02xthread:%s;%swatch:" TARGET_FMT_lx ";",
GDB_SIGNAL_TRAP, tid->str, type,
@@ -2733,7 +2734,7 @@ static void gdb_vm_state_change(void *opaque, bool running, RunState state)
g_string_printf(buf, "T%02xthread:%s;", ret, tid->str);
send_packet:
- put_packet(buf->str);
+ gdb_put_packet(buf->str);
/* disable single step if it was enabled */
cpu_single_step(cpu, 0);
@@ -2794,7 +2795,7 @@ void gdb_do_syscallv(gdb_syscall_complete_cb cb, const char *fmt, va_list va)
}
*p = 0;
#ifdef CONFIG_USER_ONLY
- put_packet(gdbserver_state.syscall_buf);
+ gdb_put_packet(gdbserver_state.syscall_buf);
/* Return control to gdb for it to process the syscall request.
* Since the protocol requires that gdb hands control back to us
* using a "here are the results" F packet, we don't need to check
@@ -2822,7 +2823,7 @@ void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...)
va_end(va);
}
-static void gdb_read_byte(uint8_t ch)
+void gdb_read_byte(uint8_t ch)
{
uint8_t reply;
@@ -2832,7 +2833,7 @@ static void gdb_read_byte(uint8_t ch)
of a new command then abandon the previous response. */
if (ch == '-') {
trace_gdbstub_err_got_nack();
- put_buffer(gdbserver_state.last_packet->data,
+ gdb_put_buffer(gdbserver_state.last_packet->data,
gdbserver_state.last_packet->len);
} else if (ch == '+') {
trace_gdbstub_io_got_ack();
@@ -2954,12 +2955,12 @@ static void gdb_read_byte(uint8_t ch)
trace_gdbstub_err_checksum_incorrect(gdbserver_state.line_sum, gdbserver_state.line_csum);
/* send NAK reply */
reply = '-';
- put_buffer(&reply, 1);
+ gdb_put_buffer(&reply, 1);
gdbserver_state.state = RS_IDLE;
} else {
/* send ACK reply */
reply = '+';
- put_buffer(&reply, 1);
+ gdb_put_buffer(&reply, 1);
gdbserver_state.state = gdb_handle_packet(gdbserver_state.line_buf);
}
break;
@@ -2989,7 +2990,7 @@ void gdb_exit(int code)
trace_gdbstub_op_exiting((uint8_t)code);
snprintf(buf, sizeof(buf), "W%02x", (uint8_t)code);
- put_packet(buf);
+ gdb_put_packet(buf);
#ifndef CONFIG_USER_ONLY
qemu_chr_fe_deinit(&gdbserver_system_state.chr, true);
@@ -3001,7 +3002,7 @@ void gdb_exit(int code)
* part of a CPU cluster). Note that if this process contains no CPUs, it won't
* be attachable and thus will be invisible to the user.
*/
-static void create_default_process(GDBState *s)
+void gdb_create_default_process(GDBState *s)
{
GDBProcess *process;
int max_pid = 0;
@@ -3042,9 +3043,9 @@ gdb_handlesig(CPUState *cpu, int sig)
"T%02xthread:", target_signal_to_gdb(sig));
gdb_append_thread_id(cpu, gdbserver_state.str_buf);
g_string_append_c(gdbserver_state.str_buf, ';');
- put_strbuf();
+ gdb_put_strbuf();
}
- /* put_packet() might have detected that the peer terminated the
+ /* gdb_put_packet() might have detected that the peer terminated the
connection. */
if (gdbserver_user_state.fd < 0) {
return sig;
@@ -3086,13 +3087,13 @@ void gdb_signalled(CPUArchState *env, int sig)
}
snprintf(buf, sizeof(buf), "X%02x", target_signal_to_gdb(sig));
- put_packet(buf);
+ gdb_put_packet(buf);
}
static void gdb_accept_init(int fd)
{
- init_gdbserver_state();
- create_default_process(&gdbserver_state);
+ gdb_init_gdbserver_state();
+ gdb_create_default_process(&gdbserver_state);
gdbserver_state.processes[0].attached = true;
gdbserver_state.c_cpu = gdb_first_attached_cpu();
gdbserver_state.g_cpu = gdbserver_state.c_cpu;
@@ -3292,8 +3293,8 @@ static void gdb_chr_event(void *opaque, QEMUChrEvent event)
static int gdb_monitor_write(Chardev *chr, const uint8_t *buf, int len)
{
g_autoptr(GString) hex_buf = g_string_new("O");
- memtohex(hex_buf, buf, len);
- put_packet(hex_buf->str);
+ gdb_memtohex(hex_buf, buf, len);
+ gdb_put_packet(hex_buf->str);
return len;
}
@@ -3379,7 +3380,7 @@ static void create_processes(GDBState *s)
qsort(gdbserver_state.processes, gdbserver_state.process_num, sizeof(gdbserver_state.processes[0]), pid_order);
}
- create_default_process(s);
+ gdb_create_default_process(s);
}
int gdbserver_start(const char *device)
@@ -3429,7 +3430,7 @@ int gdbserver_start(const char *device)
}
if (!gdbserver_state.init) {
- init_gdbserver_state();
+ gdb_init_gdbserver_state();
qemu_add_vm_change_state_handler(gdb_vm_state_change, NULL);
--
2.39.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v3 09/24] gdbstub: move chunk of softmmu functionality to own file
2023-02-21 22:52 [PATCH v3 00/24] gdbstub: re-organise to for better compilation behaviour Alex Bennée
` (7 preceding siblings ...)
2023-02-21 22:52 ` [PATCH v3 08/24] gdbstub: make various helpers visible to the rest of the module Alex Bennée
@ 2023-02-21 22:52 ` Alex Bennée
2023-02-22 0:26 ` Richard Henderson
2023-02-21 22:52 ` [PATCH v3 10/24] gdbstub: move chunks of user code into own files Alex Bennée
` (14 subsequent siblings)
23 siblings, 1 reply; 32+ messages in thread
From: Alex Bennée @ 2023-02-21 22:52 UTC (permalink / raw)
To: qemu-devel
Cc: Thomas Huth, qemu-arm, qemu-riscv, qemu-s390x, Yoshinori Sato,
nicolas.eder, Stafford Horne, Daniel Henrique Barboza,
Mahmoud Mandour, Taylor Simpson, mads, Marek Vasut,
Artyom Tarasenko, Alistair Francis, qemu-ppc, Yanan Wang,
Sunil Muthuswamy, Cédric Le Goater, Eduardo Habkost,
Bin Meng, Bastian Koppelmann, Palmer Dabbelt, Marcel Apfelbaum,
Laurent Vivier, Philippe Mathieu-Daudé, Michael Rolnik,
Aleksandar Rikalo, Paolo Bonzini, Alex Bennée,
Aurelien Jarno, Xiaojuan Yang, Richard Henderson, Peter Maydell,
Alexandre Iooss, Chris Wulff, Jiaxun Yang, David Gibson,
Edgar E. Iglesias, Greg Kurz, David Hildenbrand, Song Gao,
Ilya Leoshkevich, Max Filippov, Mark Cave-Ayland, Fabiano Rosas
This is mostly code motion but a number of things needed to be done
for this minimal patch set:
- move shared structures to internals.h
- splitting some functions into user and softmmu versions
- fixing a few casting issues to keep softmmu common
More CONFIG_USER_ONLY stuff will be handled in a following patches.
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
v3
- rebase fixes
- move extern to internals.h
---
gdbstub/internals.h | 43 ++++-
gdbstub/gdbstub.c | 421 +------------------------------------------
gdbstub/softmmu.c | 415 ++++++++++++++++++++++++++++++++++++++++++
gdbstub/trace-events | 4 +-
4 files changed, 470 insertions(+), 413 deletions(-)
diff --git a/gdbstub/internals.h b/gdbstub/internals.h
index 73e454edfe..c889f52beb 100644
--- a/gdbstub/internals.h
+++ b/gdbstub/internals.h
@@ -15,6 +15,18 @@
* Shared structures and definitions
*/
+enum {
+ GDB_SIGNAL_0 = 0,
+ GDB_SIGNAL_INT = 2,
+ GDB_SIGNAL_QUIT = 3,
+ GDB_SIGNAL_TRAP = 5,
+ GDB_SIGNAL_ABRT = 6,
+ GDB_SIGNAL_ALRM = 14,
+ GDB_SIGNAL_IO = 23,
+ GDB_SIGNAL_XCPU = 24,
+ GDB_SIGNAL_UNKNOWN = 143
+};
+
typedef struct GDBProcess {
uint32_t pid;
bool attached;
@@ -55,6 +67,8 @@ typedef struct GDBState {
int supported_sstep_flags;
} GDBState;
+/* lives in main gdbstub.c */
+extern GDBState gdbserver_state;
/*
* Inline utility function, convert from int to hex and back
@@ -99,7 +113,6 @@ CPUState *gdb_first_attached_cpu(void);
void gdb_append_thread_id(CPUState *cpu, GString *buf);
int gdb_get_cpu_index(CPUState *cpu);
-void gdb_init_gdbserver_state(void);
void gdb_create_default_process(GDBState *s);
/*
@@ -107,6 +120,34 @@ void gdb_create_default_process(GDBState *s);
*/
void gdb_put_buffer(const uint8_t *buf, int len);
+/*
+ * Command handlers - either softmmu or user only
+ */
+void gdb_init_gdbserver_state(void);
+
+typedef enum GDBThreadIdKind {
+ GDB_ONE_THREAD = 0,
+ GDB_ALL_THREADS, /* One process, all threads */
+ GDB_ALL_PROCESSES,
+ GDB_READ_THREAD_ERR
+} GDBThreadIdKind;
+
+typedef union GdbCmdVariant {
+ const char *data;
+ uint8_t opcode;
+ unsigned long val_ul;
+ unsigned long long val_ull;
+ struct {
+ GDBThreadIdKind kind;
+ uint32_t pid;
+ uint32_t tid;
+ } thread_id;
+} GdbCmdVariant;
+
+#define get_param(p, i) (&g_array_index(p, GdbCmdVariant, i))
+
+void gdb_handle_query_rcmd(GArray *params, void *user_ctx); /* softmmu */
+
/*
* Break/Watch point support - there is an implementation for softmmu
* and user mode.
diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c
index 41414d89bc..817fe5e61a 100644
--- a/gdbstub/gdbstub.c
+++ b/gdbstub/gdbstub.c
@@ -24,8 +24,6 @@
*/
#include "qemu/osdep.h"
-#include "qapi/error.h"
-#include "qemu/error-report.h"
#include "qemu/ctype.h"
#include "qemu/cutils.h"
#include "qemu/module.h"
@@ -34,9 +32,6 @@
#ifdef CONFIG_USER_ONLY
#include "qemu.h"
#else
-#include "monitor/monitor.h"
-#include "chardev/char.h"
-#include "chardev/char-fe.h"
#include "hw/cpu/cluster.h"
#include "hw/boards.h"
#endif
@@ -88,30 +83,15 @@ static inline int target_memory_rw_debug(CPUState *cpu, target_ulong addr,
/*
* Return the GDB index for a given vCPU state.
*
- * For user mode this is simply the thread id. In system mode GDB
- * numbers CPUs from 1 as 0 is reserved as an "any cpu" index.
+ * For user mode this is simply the thread id.
*/
+#if defined(CONFIG_USER_ONLY)
int gdb_get_cpu_index(CPUState *cpu)
{
-#if defined(CONFIG_USER_ONLY)
TaskState *ts = (TaskState *) cpu->opaque;
return ts ? ts->ts_tid : -1;
-#else
- return cpu->cpu_index + 1;
-#endif
}
-
-enum {
- GDB_SIGNAL_0 = 0,
- GDB_SIGNAL_INT = 2,
- GDB_SIGNAL_QUIT = 3,
- GDB_SIGNAL_TRAP = 5,
- GDB_SIGNAL_ABRT = 6,
- GDB_SIGNAL_ALRM = 14,
- GDB_SIGNAL_IO = 23,
- GDB_SIGNAL_XCPU = 24,
- GDB_SIGNAL_UNKNOWN = 143
-};
+#endif
#ifdef CONFIG_USER_ONLY
@@ -333,15 +313,9 @@ typedef struct {
int running_state;
} GDBUserState;
static GDBUserState gdbserver_user_state;
-#else
-typedef struct {
- CharBackend chr;
- Chardev *mon_chr;
-} GDBSystemState;
-static GDBSystemState gdbserver_system_state;
#endif
-static GDBState gdbserver_state;
+GDBState gdbserver_state;
void gdb_init_gdbserver_state(void)
{
@@ -362,15 +336,6 @@ void gdb_init_gdbserver_state(void)
gdbserver_state.sstep_flags &= gdbserver_state.supported_sstep_flags;
}
-#ifndef CONFIG_USER_ONLY
-static void reset_gdbserver_state(void)
-{
- g_free(gdbserver_state.processes);
- gdbserver_state.processes = NULL;
- gdbserver_state.process_num = 0;
-}
-#endif
-
bool gdb_has_xml;
#ifdef CONFIG_USER_ONLY
@@ -446,7 +411,7 @@ static bool stub_can_reverse(void)
}
/* Resume execution. */
-static inline void gdb_continue(void)
+static void gdb_continue(void)
{
#ifdef CONFIG_USER_ONLY
@@ -525,9 +490,9 @@ static int gdb_continue_partial(char *newstates)
return res;
}
+#ifdef CONFIG_USER_ONLY
void gdb_put_buffer(const uint8_t *buf, int len)
{
-#ifdef CONFIG_USER_ONLY
int ret;
while (len > 0) {
@@ -540,12 +505,8 @@ void gdb_put_buffer(const uint8_t *buf, int len)
len -= ret;
}
}
-#else
- /* XXX this blocks entire thread. Rewrite to use
- * qemu_chr_fe_write and background I/O callbacks */
- qemu_chr_fe_write_all(&gdbserver_system_state.chr, buf, len);
-#endif
}
+#endif
/* writes 2*len+1 bytes in buf */
void gdb_memtohex(GString *buf, const uint8_t *mem, int len)
@@ -993,13 +954,6 @@ void gdb_append_thread_id(CPUState *cpu, GString *buf)
}
}
-typedef enum GDBThreadIdKind {
- GDB_ONE_THREAD = 0,
- GDB_ALL_THREADS, /* One process, all threads */
- GDB_ALL_PROCESSES,
- GDB_READ_THREAD_ERR
-} GDBThreadIdKind;
-
static GDBThreadIdKind read_thread_id(const char *buf, const char **end_buf,
uint32_t *pid, uint32_t *tid)
{
@@ -1180,20 +1134,6 @@ out:
return res;
}
-typedef union GdbCmdVariant {
- const char *data;
- uint8_t opcode;
- unsigned long val_ul;
- unsigned long long val_ull;
- struct {
- GDBThreadIdKind kind;
- uint32_t pid;
- uint32_t tid;
- } thread_id;
-} GdbCmdVariant;
-
-#define get_param(p, i) (&g_array_index(p, GdbCmdVariant, i))
-
static const char *cmd_next_param(const char *param, const char delimiter)
{
static const char all_delimiters[] = ",;:=";
@@ -2024,32 +1964,6 @@ static void handle_query_offsets(GArray *params, void *user_ctx)
ts->info->data_offset);
gdb_put_strbuf();
}
-#else
-static void handle_query_rcmd(GArray *params, void *user_ctx)
-{
- const guint8 zero = 0;
- int len;
-
- if (!params->len) {
- gdb_put_packet("E22");
- return;
- }
-
- len = strlen(get_param(params, 0)->data);
- if (len % 2) {
- gdb_put_packet("E01");
- return;
- }
-
- g_assert(gdbserver_state.mem_buf->len == 0);
- len = len / 2;
- gdb_hextomem(gdbserver_state.mem_buf, get_param(params, 0)->data, len);
- g_byte_array_append(gdbserver_state.mem_buf, &zero, 1);
- qemu_chr_be_write(gdbserver_system_state.mon_chr,
- gdbserver_state.mem_buf->data,
- gdbserver_state.mem_buf->len);
- gdb_put_packet("OK");
-}
#endif
static void handle_query_supported(GArray *params, void *user_ctx)
@@ -2263,7 +2177,7 @@ static const GdbCmdParseEntry gdb_gen_query_table[] = {
},
#else
{
- .handler = handle_query_rcmd,
+ .handler = gdb_handle_query_rcmd,
.cmd = "Rcmd,",
.cmd_startswith = 1,
.schema = "s0"
@@ -2647,100 +2561,6 @@ void gdb_set_stop_cpu(CPUState *cpu)
gdbserver_state.g_cpu = cpu;
}
-#ifndef CONFIG_USER_ONLY
-static void gdb_vm_state_change(void *opaque, bool running, RunState state)
-{
- CPUState *cpu = gdbserver_state.c_cpu;
- g_autoptr(GString) buf = g_string_new(NULL);
- g_autoptr(GString) tid = g_string_new(NULL);
- const char *type;
- int ret;
-
- if (running || gdbserver_state.state == RS_INACTIVE) {
- return;
- }
- /* Is there a GDB syscall waiting to be sent? */
- if (gdbserver_state.current_syscall_cb) {
- gdb_put_packet(gdbserver_state.syscall_buf);
- return;
- }
-
- if (cpu == NULL) {
- /* No process attached */
- return;
- }
-
- gdb_append_thread_id(cpu, tid);
-
- switch (state) {
- case RUN_STATE_DEBUG:
- if (cpu->watchpoint_hit) {
- switch (cpu->watchpoint_hit->flags & BP_MEM_ACCESS) {
- case BP_MEM_READ:
- type = "r";
- break;
- case BP_MEM_ACCESS:
- type = "a";
- break;
- default:
- type = "";
- break;
- }
- trace_gdbstub_hit_watchpoint(type, gdb_get_cpu_index(cpu),
- (target_ulong)cpu->watchpoint_hit->vaddr);
- g_string_printf(buf, "T%02xthread:%s;%swatch:" TARGET_FMT_lx ";",
- GDB_SIGNAL_TRAP, tid->str, type,
- (target_ulong)cpu->watchpoint_hit->vaddr);
- cpu->watchpoint_hit = NULL;
- goto send_packet;
- } else {
- trace_gdbstub_hit_break();
- }
- tb_flush(cpu);
- ret = GDB_SIGNAL_TRAP;
- break;
- case RUN_STATE_PAUSED:
- trace_gdbstub_hit_paused();
- ret = GDB_SIGNAL_INT;
- break;
- case RUN_STATE_SHUTDOWN:
- trace_gdbstub_hit_shutdown();
- ret = GDB_SIGNAL_QUIT;
- break;
- case RUN_STATE_IO_ERROR:
- trace_gdbstub_hit_io_error();
- ret = GDB_SIGNAL_IO;
- break;
- case RUN_STATE_WATCHDOG:
- trace_gdbstub_hit_watchdog();
- ret = GDB_SIGNAL_ALRM;
- break;
- case RUN_STATE_INTERNAL_ERROR:
- trace_gdbstub_hit_internal_error();
- ret = GDB_SIGNAL_ABRT;
- break;
- case RUN_STATE_SAVE_VM:
- case RUN_STATE_RESTORE_VM:
- return;
- case RUN_STATE_FINISH_MIGRATE:
- ret = GDB_SIGNAL_XCPU;
- break;
- default:
- trace_gdbstub_hit_unknown(state);
- ret = GDB_SIGNAL_UNKNOWN;
- break;
- }
- gdb_set_stop_cpu(cpu);
- g_string_printf(buf, "T%02xthread:%s;", ret, tid->str);
-
-send_packet:
- gdb_put_packet(buf->str);
-
- /* disable single step if it was enabled */
- cpu_single_step(cpu, 0);
-}
-#endif
-
/* Send a gdb syscall request.
This accepts limited printf-style format specifiers, specifically:
%x - target_ulong argument printed in hex.
@@ -2970,6 +2790,7 @@ void gdb_read_byte(uint8_t ch)
}
}
+#ifdef CONFIG_USER_ONLY
/* Tell the remote gdb that the process has exited. */
void gdb_exit(int code)
{
@@ -2978,24 +2799,19 @@ void gdb_exit(int code)
if (!gdbserver_state.init) {
return;
}
-#ifdef CONFIG_USER_ONLY
if (gdbserver_user_state.socket_path) {
unlink(gdbserver_user_state.socket_path);
}
if (gdbserver_user_state.fd < 0) {
return;
}
-#endif
trace_gdbstub_op_exiting((uint8_t)code);
snprintf(buf, sizeof(buf), "W%02x", (uint8_t)code);
gdb_put_packet(buf);
-
-#ifndef CONFIG_USER_ONLY
- qemu_chr_fe_deinit(&gdbserver_system_state.chr, true);
-#endif
}
+#endif
/*
* Create the process that will contain all the "orphan" CPUs (that are not
@@ -3249,221 +3065,4 @@ void gdbserver_fork(CPUState *cpu)
cpu_breakpoint_remove_all(cpu, BP_GDB);
cpu_watchpoint_remove_all(cpu, BP_GDB);
}
-#else
-static int gdb_chr_can_receive(void *opaque)
-{
- /* We can handle an arbitrarily large amount of data.
- Pick the maximum packet size, which is as good as anything. */
- return MAX_PACKET_LENGTH;
-}
-
-static void gdb_chr_receive(void *opaque, const uint8_t *buf, int size)
-{
- int i;
-
- for (i = 0; i < size; i++) {
- gdb_read_byte(buf[i]);
- }
-}
-
-static void gdb_chr_event(void *opaque, QEMUChrEvent event)
-{
- int i;
- GDBState *s = (GDBState *) opaque;
-
- switch (event) {
- case CHR_EVENT_OPENED:
- /* Start with first process attached, others detached */
- for (i = 0; i < s->process_num; i++) {
- s->processes[i].attached = !i;
- }
-
- s->c_cpu = gdb_first_attached_cpu();
- s->g_cpu = s->c_cpu;
-
- vm_stop(RUN_STATE_PAUSED);
- replay_gdb_attached();
- gdb_has_xml = false;
- break;
- default:
- break;
- }
-}
-
-static int gdb_monitor_write(Chardev *chr, const uint8_t *buf, int len)
-{
- g_autoptr(GString) hex_buf = g_string_new("O");
- gdb_memtohex(hex_buf, buf, len);
- gdb_put_packet(hex_buf->str);
- return len;
-}
-
-#ifndef _WIN32
-static void gdb_sigterm_handler(int signal)
-{
- if (runstate_is_running()) {
- vm_stop(RUN_STATE_PAUSED);
- }
-}
-#endif
-
-static void gdb_monitor_open(Chardev *chr, ChardevBackend *backend,
- bool *be_opened, Error **errp)
-{
- *be_opened = false;
-}
-
-static void char_gdb_class_init(ObjectClass *oc, void *data)
-{
- ChardevClass *cc = CHARDEV_CLASS(oc);
-
- cc->internal = true;
- cc->open = gdb_monitor_open;
- cc->chr_write = gdb_monitor_write;
-}
-
-#define TYPE_CHARDEV_GDB "chardev-gdb"
-
-static const TypeInfo char_gdb_type_info = {
- .name = TYPE_CHARDEV_GDB,
- .parent = TYPE_CHARDEV,
- .class_init = char_gdb_class_init,
-};
-
-static int find_cpu_clusters(Object *child, void *opaque)
-{
- if (object_dynamic_cast(child, TYPE_CPU_CLUSTER)) {
- GDBState *s = (GDBState *) opaque;
- CPUClusterState *cluster = CPU_CLUSTER(child);
- GDBProcess *process;
-
- s->processes = g_renew(GDBProcess, s->processes, ++s->process_num);
-
- process = &s->processes[s->process_num - 1];
-
- /*
- * GDB process IDs -1 and 0 are reserved. To avoid subtle errors at
- * runtime, we enforce here that the machine does not use a cluster ID
- * that would lead to PID 0.
- */
- assert(cluster->cluster_id != UINT32_MAX);
- process->pid = cluster->cluster_id + 1;
- process->attached = false;
- process->target_xml[0] = '\0';
-
- return 0;
- }
-
- return object_child_foreach(child, find_cpu_clusters, opaque);
-}
-
-static int pid_order(const void *a, const void *b)
-{
- GDBProcess *pa = (GDBProcess *) a;
- GDBProcess *pb = (GDBProcess *) b;
-
- if (pa->pid < pb->pid) {
- return -1;
- } else if (pa->pid > pb->pid) {
- return 1;
- } else {
- return 0;
- }
-}
-
-static void create_processes(GDBState *s)
-{
- object_child_foreach(object_get_root(), find_cpu_clusters, s);
-
- if (gdbserver_state.processes) {
- /* Sort by PID */
- qsort(gdbserver_state.processes, gdbserver_state.process_num, sizeof(gdbserver_state.processes[0]), pid_order);
- }
-
- gdb_create_default_process(s);
-}
-
-int gdbserver_start(const char *device)
-{
- trace_gdbstub_op_start(device);
-
- char gdbstub_device_name[128];
- Chardev *chr = NULL;
- Chardev *mon_chr;
-
- if (!first_cpu) {
- error_report("gdbstub: meaningless to attach gdb to a "
- "machine without any CPU.");
- return -1;
- }
-
- if (!gdb_supports_guest_debug()) {
- error_report("gdbstub: current accelerator doesn't support guest debugging");
- return -1;
- }
-
- if (!device)
- return -1;
- if (strcmp(device, "none") != 0) {
- if (strstart(device, "tcp:", NULL)) {
- /* enforce required TCP attributes */
- snprintf(gdbstub_device_name, sizeof(gdbstub_device_name),
- "%s,wait=off,nodelay=on,server=on", device);
- device = gdbstub_device_name;
- }
-#ifndef _WIN32
- else if (strcmp(device, "stdio") == 0) {
- struct sigaction act;
-
- memset(&act, 0, sizeof(act));
- act.sa_handler = gdb_sigterm_handler;
- sigaction(SIGINT, &act, NULL);
- }
-#endif
- /*
- * FIXME: it's a bit weird to allow using a mux chardev here
- * and implicitly setup a monitor. We may want to break this.
- */
- chr = qemu_chr_new_noreplay("gdb", device, true, NULL);
- if (!chr)
- return -1;
- }
-
- if (!gdbserver_state.init) {
- gdb_init_gdbserver_state();
-
- qemu_add_vm_change_state_handler(gdb_vm_state_change, NULL);
-
- /* Initialize a monitor terminal for gdb */
- mon_chr = qemu_chardev_new(NULL, TYPE_CHARDEV_GDB,
- NULL, NULL, &error_abort);
- monitor_init_hmp(mon_chr, false, &error_abort);
- } else {
- qemu_chr_fe_deinit(&gdbserver_system_state.chr, true);
- mon_chr = gdbserver_system_state.mon_chr;
- reset_gdbserver_state();
- }
-
- create_processes(&gdbserver_state);
-
- if (chr) {
- qemu_chr_fe_init(&gdbserver_system_state.chr, chr, &error_abort);
- qemu_chr_fe_set_handlers(&gdbserver_system_state.chr,
- gdb_chr_can_receive,
- gdb_chr_receive, gdb_chr_event,
- NULL, &gdbserver_state, NULL, true);
- }
- gdbserver_state.state = chr ? RS_IDLE : RS_INACTIVE;
- gdbserver_system_state.mon_chr = mon_chr;
- gdbserver_state.current_syscall_cb = NULL;
-
- return 0;
-}
-
-static void register_types(void)
-{
- type_register_static(&char_gdb_type_info);
-}
-
-type_init(register_types);
#endif
diff --git a/gdbstub/softmmu.c b/gdbstub/softmmu.c
index 183dfb40e4..0be5511ea7 100644
--- a/gdbstub/softmmu.c
+++ b/gdbstub/softmmu.c
@@ -11,11 +11,426 @@
*/
#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "qemu/error-report.h"
+#include "qemu/cutils.h"
#include "exec/gdbstub.h"
#include "exec/hwaddr.h"
+#include "exec/tb-flush.h"
#include "sysemu/cpus.h"
+#include "sysemu/runstate.h"
+#include "sysemu/replay.h"
+#include "hw/core/cpu.h"
+#include "hw/cpu/cluster.h"
+#include "hw/boards.h"
+#include "chardev/char.h"
+#include "chardev/char-fe.h"
+#include "monitor/monitor.h"
+#include "trace.h"
#include "internals.h"
+/* System emulation specific state */
+typedef struct {
+ CharBackend chr;
+ Chardev *mon_chr;
+} GDBSystemState;
+
+GDBSystemState gdbserver_system_state;
+
+static void reset_gdbserver_state(void)
+{
+ g_free(gdbserver_state.processes);
+ gdbserver_state.processes = NULL;
+ gdbserver_state.process_num = 0;
+}
+
+/*
+ * Return the GDB index for a given vCPU state.
+ *
+ * In system mode GDB numbers CPUs from 1 as 0 is reserved as an "any
+ * cpu" index.
+ */
+int gdb_get_cpu_index(CPUState *cpu)
+{
+ return cpu->cpu_index + 1;
+}
+
+/*
+ * GDB Connection management. For system emulation we do all of this
+ * via our existing Chardev infrastructure which allows us to support
+ * network and unix sockets.
+ */
+
+void gdb_put_buffer(const uint8_t *buf, int len)
+{
+ /* XXX this blocks entire thread. Rewrite to use
+ * qemu_chr_fe_write and background I/O callbacks */
+ qemu_chr_fe_write_all(&gdbserver_system_state.chr, buf, len);
+}
+
+static void gdb_chr_event(void *opaque, QEMUChrEvent event)
+{
+ int i;
+ GDBState *s = (GDBState *) opaque;
+
+ switch (event) {
+ case CHR_EVENT_OPENED:
+ /* Start with first process attached, others detached */
+ for (i = 0; i < s->process_num; i++) {
+ s->processes[i].attached = !i;
+ }
+
+ s->c_cpu = gdb_first_attached_cpu();
+ s->g_cpu = s->c_cpu;
+
+ vm_stop(RUN_STATE_PAUSED);
+ replay_gdb_attached();
+ gdb_has_xml = false;
+ break;
+ default:
+ break;
+ }
+}
+
+static void gdb_vm_state_change(void *opaque, bool running, RunState state)
+{
+ CPUState *cpu = gdbserver_state.c_cpu;
+ g_autoptr(GString) buf = g_string_new(NULL);
+ g_autoptr(GString) tid = g_string_new(NULL);
+ const char *type;
+ int ret;
+
+ if (running || gdbserver_state.state == RS_INACTIVE) {
+ return;
+ }
+ /* Is there a GDB syscall waiting to be sent? */
+ if (gdbserver_state.current_syscall_cb) {
+ gdb_put_packet(gdbserver_state.syscall_buf);
+ return;
+ }
+
+ if (cpu == NULL) {
+ /* No process attached */
+ return;
+ }
+
+ gdb_append_thread_id(cpu, tid);
+
+ switch (state) {
+ case RUN_STATE_DEBUG:
+ if (cpu->watchpoint_hit) {
+ switch (cpu->watchpoint_hit->flags & BP_MEM_ACCESS) {
+ case BP_MEM_READ:
+ type = "r";
+ break;
+ case BP_MEM_ACCESS:
+ type = "a";
+ break;
+ default:
+ type = "";
+ break;
+ }
+ trace_gdbstub_hit_watchpoint(type,
+ gdb_get_cpu_index(cpu),
+ cpu->watchpoint_hit->vaddr);
+ g_string_printf(buf, "T%02xthread:%s;%swatch:%" VADDR_PRIx ";",
+ GDB_SIGNAL_TRAP, tid->str, type,
+ cpu->watchpoint_hit->vaddr);
+ cpu->watchpoint_hit = NULL;
+ goto send_packet;
+ } else {
+ trace_gdbstub_hit_break();
+ }
+ tb_flush(cpu);
+ ret = GDB_SIGNAL_TRAP;
+ break;
+ case RUN_STATE_PAUSED:
+ trace_gdbstub_hit_paused();
+ ret = GDB_SIGNAL_INT;
+ break;
+ case RUN_STATE_SHUTDOWN:
+ trace_gdbstub_hit_shutdown();
+ ret = GDB_SIGNAL_QUIT;
+ break;
+ case RUN_STATE_IO_ERROR:
+ trace_gdbstub_hit_io_error();
+ ret = GDB_SIGNAL_IO;
+ break;
+ case RUN_STATE_WATCHDOG:
+ trace_gdbstub_hit_watchdog();
+ ret = GDB_SIGNAL_ALRM;
+ break;
+ case RUN_STATE_INTERNAL_ERROR:
+ trace_gdbstub_hit_internal_error();
+ ret = GDB_SIGNAL_ABRT;
+ break;
+ case RUN_STATE_SAVE_VM:
+ case RUN_STATE_RESTORE_VM:
+ return;
+ case RUN_STATE_FINISH_MIGRATE:
+ ret = GDB_SIGNAL_XCPU;
+ break;
+ default:
+ trace_gdbstub_hit_unknown(state);
+ ret = GDB_SIGNAL_UNKNOWN;
+ break;
+ }
+ gdb_set_stop_cpu(cpu);
+ g_string_printf(buf, "T%02xthread:%s;", ret, tid->str);
+
+send_packet:
+ gdb_put_packet(buf->str);
+
+ /* disable single step if it was enabled */
+ cpu_single_step(cpu, 0);
+}
+
+#ifndef _WIN32
+static void gdb_sigterm_handler(int signal)
+{
+ if (runstate_is_running()) {
+ vm_stop(RUN_STATE_PAUSED);
+ }
+}
+#endif
+
+static int gdb_monitor_write(Chardev *chr, const uint8_t *buf, int len)
+{
+ g_autoptr(GString) hex_buf = g_string_new("O");
+ gdb_memtohex(hex_buf, buf, len);
+ gdb_put_packet(hex_buf->str);
+ return len;
+}
+
+static void gdb_monitor_open(Chardev *chr, ChardevBackend *backend,
+ bool *be_opened, Error **errp)
+{
+ *be_opened = false;
+}
+
+static void char_gdb_class_init(ObjectClass *oc, void *data)
+{
+ ChardevClass *cc = CHARDEV_CLASS(oc);
+
+ cc->internal = true;
+ cc->open = gdb_monitor_open;
+ cc->chr_write = gdb_monitor_write;
+}
+
+#define TYPE_CHARDEV_GDB "chardev-gdb"
+
+static const TypeInfo char_gdb_type_info = {
+ .name = TYPE_CHARDEV_GDB,
+ .parent = TYPE_CHARDEV,
+ .class_init = char_gdb_class_init,
+};
+
+static int gdb_chr_can_receive(void *opaque)
+{
+ /* We can handle an arbitrarily large amount of data.
+ Pick the maximum packet size, which is as good as anything. */
+ return MAX_PACKET_LENGTH;
+}
+
+static void gdb_chr_receive(void *opaque, const uint8_t *buf, int size)
+{
+ int i;
+
+ for (i = 0; i < size; i++) {
+ gdb_read_byte(buf[i]);
+ }
+}
+
+static int find_cpu_clusters(Object *child, void *opaque)
+{
+ if (object_dynamic_cast(child, TYPE_CPU_CLUSTER)) {
+ GDBState *s = (GDBState *) opaque;
+ CPUClusterState *cluster = CPU_CLUSTER(child);
+ GDBProcess *process;
+
+ s->processes = g_renew(GDBProcess, s->processes, ++s->process_num);
+
+ process = &s->processes[s->process_num - 1];
+
+ /*
+ * GDB process IDs -1 and 0 are reserved. To avoid subtle errors at
+ * runtime, we enforce here that the machine does not use a cluster ID
+ * that would lead to PID 0.
+ */
+ assert(cluster->cluster_id != UINT32_MAX);
+ process->pid = cluster->cluster_id + 1;
+ process->attached = false;
+ process->target_xml[0] = '\0';
+
+ return 0;
+ }
+
+ return object_child_foreach(child, find_cpu_clusters, opaque);
+}
+
+static int pid_order(const void *a, const void *b)
+{
+ GDBProcess *pa = (GDBProcess *) a;
+ GDBProcess *pb = (GDBProcess *) b;
+
+ if (pa->pid < pb->pid) {
+ return -1;
+ } else if (pa->pid > pb->pid) {
+ return 1;
+ } else {
+ return 0;
+ }
+}
+
+static void create_processes(GDBState *s)
+{
+ object_child_foreach(object_get_root(), find_cpu_clusters, s);
+
+ if (gdbserver_state.processes) {
+ /* Sort by PID */
+ qsort(gdbserver_state.processes,
+ gdbserver_state.process_num,
+ sizeof(gdbserver_state.processes[0]),
+ pid_order);
+ }
+
+ gdb_create_default_process(s);
+}
+
+int gdbserver_start(const char *device)
+{
+ trace_gdbstub_op_start(device);
+
+ char gdbstub_device_name[128];
+ Chardev *chr = NULL;
+ Chardev *mon_chr;
+
+ if (!first_cpu) {
+ error_report("gdbstub: meaningless to attach gdb to a "
+ "machine without any CPU.");
+ return -1;
+ }
+
+ if (!gdb_supports_guest_debug()) {
+ error_report("gdbstub: current accelerator doesn't support guest debugging");
+ return -1;
+ }
+
+ if (!device)
+ return -1;
+ if (strcmp(device, "none") != 0) {
+ if (strstart(device, "tcp:", NULL)) {
+ /* enforce required TCP attributes */
+ snprintf(gdbstub_device_name, sizeof(gdbstub_device_name),
+ "%s,wait=off,nodelay=on,server=on", device);
+ device = gdbstub_device_name;
+ }
+#ifndef _WIN32
+ else if (strcmp(device, "stdio") == 0) {
+ struct sigaction act;
+
+ memset(&act, 0, sizeof(act));
+ act.sa_handler = gdb_sigterm_handler;
+ sigaction(SIGINT, &act, NULL);
+ }
+#endif
+ /*
+ * FIXME: it's a bit weird to allow using a mux chardev here
+ * and implicitly setup a monitor. We may want to break this.
+ */
+ chr = qemu_chr_new_noreplay("gdb", device, true, NULL);
+ if (!chr)
+ return -1;
+ }
+
+ if (!gdbserver_state.init) {
+ gdb_init_gdbserver_state();
+
+ qemu_add_vm_change_state_handler(gdb_vm_state_change, NULL);
+
+ /* Initialize a monitor terminal for gdb */
+ mon_chr = qemu_chardev_new(NULL, TYPE_CHARDEV_GDB,
+ NULL, NULL, &error_abort);
+ monitor_init_hmp(mon_chr, false, &error_abort);
+ } else {
+ qemu_chr_fe_deinit(&gdbserver_system_state.chr, true);
+ mon_chr = gdbserver_system_state.mon_chr;
+ reset_gdbserver_state();
+ }
+
+ create_processes(&gdbserver_state);
+
+ if (chr) {
+ qemu_chr_fe_init(&gdbserver_system_state.chr, chr, &error_abort);
+ qemu_chr_fe_set_handlers(&gdbserver_system_state.chr,
+ gdb_chr_can_receive,
+ gdb_chr_receive, gdb_chr_event,
+ NULL, &gdbserver_state, NULL, true);
+ }
+ gdbserver_state.state = chr ? RS_IDLE : RS_INACTIVE;
+ gdbserver_system_state.mon_chr = mon_chr;
+ gdbserver_state.current_syscall_cb = NULL;
+
+ return 0;
+}
+
+static void register_types(void)
+{
+ type_register_static(&char_gdb_type_info);
+}
+
+type_init(register_types);
+
+/* Tell the remote gdb that the process has exited. */
+void gdb_exit(int code)
+{
+ char buf[4];
+
+ if (!gdbserver_state.init) {
+ return;
+ }
+
+ trace_gdbstub_op_exiting((uint8_t)code);
+
+ snprintf(buf, sizeof(buf), "W%02x", (uint8_t)code);
+ gdb_put_packet(buf);
+
+ qemu_chr_fe_deinit(&gdbserver_system_state.chr, true);
+}
+
+/*
+ * Softmmu specific command helpers
+ */
+void gdb_handle_query_rcmd(GArray *params, void *user_ctx)
+{
+ const guint8 zero = 0;
+ int len;
+
+ if (!params->len) {
+ gdb_put_packet("E22");
+ return;
+ }
+
+ len = strlen(get_param(params, 0)->data);
+ if (len % 2) {
+ gdb_put_packet("E01");
+ return;
+ }
+
+ g_assert(gdbserver_state.mem_buf->len == 0);
+ len = len / 2;
+ gdb_hextomem(gdbserver_state.mem_buf, get_param(params, 0)->data, len);
+ g_byte_array_append(gdbserver_state.mem_buf, &zero, 1);
+ qemu_chr_be_write(gdbserver_system_state.mon_chr,
+ gdbserver_state.mem_buf->data,
+ gdbserver_state.mem_buf->len);
+ gdb_put_packet("OK");
+}
+
+/*
+ * Break/Watch point helpers
+ */
+
bool gdb_supports_guest_debug(void)
{
const AccelOpsClass *ops = cpus_get_accel();
diff --git a/gdbstub/trace-events b/gdbstub/trace-events
index 03f0c303bf..0c18a4d70a 100644
--- a/gdbstub/trace-events
+++ b/gdbstub/trace-events
@@ -7,7 +7,6 @@ gdbstub_op_continue(void) "Continuing all CPUs"
gdbstub_op_continue_cpu(int cpu_index) "Continuing CPU %d"
gdbstub_op_stepping(int cpu_index) "Stepping CPU %d"
gdbstub_op_extra_info(const char *info) "Thread extra info: %s"
-gdbstub_hit_watchpoint(const char *type, int cpu_gdb_index, uint64_t vaddr) "Watchpoint hit, type=\"%s\" cpu=%d, vaddr=0x%" PRIx64 ""
gdbstub_hit_internal_error(void) "RUN_STATE_INTERNAL_ERROR"
gdbstub_hit_break(void) "RUN_STATE_DEBUG"
gdbstub_hit_paused(void) "RUN_STATE_PAUSED"
@@ -27,3 +26,6 @@ gdbstub_err_invalid_repeat(uint8_t ch) "got invalid RLE count: 0x%02x"
gdbstub_err_invalid_rle(void) "got invalid RLE sequence"
gdbstub_err_checksum_invalid(uint8_t ch) "got invalid command checksum digit: 0x%02x"
gdbstub_err_checksum_incorrect(uint8_t expected, uint8_t got) "got command packet with incorrect checksum, expected=0x%02x, received=0x%02x"
+
+# softmmu.c
+gdbstub_hit_watchpoint(const char *type, int cpu_gdb_index, uint64_t vaddr) "Watchpoint hit, type=\"%s\" cpu=%d, vaddr=0x%" PRIx64 ""
--
2.39.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* Re: [PATCH v3 09/24] gdbstub: move chunk of softmmu functionality to own file
2023-02-21 22:52 ` [PATCH v3 09/24] gdbstub: move chunk of softmmu functionality to own file Alex Bennée
@ 2023-02-22 0:26 ` Richard Henderson
0 siblings, 0 replies; 32+ messages in thread
From: Richard Henderson @ 2023-02-22 0:26 UTC (permalink / raw)
To: Alex Bennée, qemu-devel
On 2/21/23 12:52, Alex Bennée wrote:
> This is mostly code motion but a number of things needed to be done
> for this minimal patch set:
>
> - move shared structures to internals.h
> - splitting some functions into user and softmmu versions
> - fixing a few casting issues to keep softmmu common
>
> More CONFIG_USER_ONLY stuff will be handled in a following patches.
>
> Reviewed-by: Fabiano Rosas<farosas@suse.de>
> Signed-off-by: Alex Bennée<alex.bennee@linaro.org>
>
> ---
> v3
> - rebase fixes
> - move extern to internals.h
> ---
> gdbstub/internals.h | 43 ++++-
> gdbstub/gdbstub.c | 421 +------------------------------------------
> gdbstub/softmmu.c | 415 ++++++++++++++++++++++++++++++++++++++++++
> gdbstub/trace-events | 4 +-
> 4 files changed, 470 insertions(+), 413 deletions(-)
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
r~
^ permalink raw reply [flat|nested] 32+ messages in thread
* [PATCH v3 10/24] gdbstub: move chunks of user code into own files
2023-02-21 22:52 [PATCH v3 00/24] gdbstub: re-organise to for better compilation behaviour Alex Bennée
` (8 preceding siblings ...)
2023-02-21 22:52 ` [PATCH v3 09/24] gdbstub: move chunk of softmmu functionality to own file Alex Bennée
@ 2023-02-21 22:52 ` Alex Bennée
2023-02-22 7:16 ` Richard Henderson
2023-02-21 22:52 ` [PATCH v3 11/24] gdbstub: rationalise signal mapping in softmmu Alex Bennée
` (13 subsequent siblings)
23 siblings, 1 reply; 32+ messages in thread
From: Alex Bennée @ 2023-02-21 22:52 UTC (permalink / raw)
To: qemu-devel
Cc: Thomas Huth, qemu-arm, qemu-riscv, qemu-s390x, Yoshinori Sato,
nicolas.eder, Stafford Horne, Daniel Henrique Barboza,
Mahmoud Mandour, Taylor Simpson, mads, Marek Vasut,
Artyom Tarasenko, Alistair Francis, qemu-ppc, Yanan Wang,
Sunil Muthuswamy, Cédric Le Goater, Eduardo Habkost,
Bin Meng, Bastian Koppelmann, Palmer Dabbelt, Marcel Apfelbaum,
Laurent Vivier, Philippe Mathieu-Daudé, Michael Rolnik,
Aleksandar Rikalo, Paolo Bonzini, Alex Bennée,
Aurelien Jarno, Xiaojuan Yang, Richard Henderson, Peter Maydell,
Alexandre Iooss, Chris Wulff, Jiaxun Yang, David Gibson,
Edgar E. Iglesias, Greg Kurz, David Hildenbrand, Song Gao,
Ilya Leoshkevich, Max Filippov, Mark Cave-Ayland, Fabiano Rosas
The process was pretty similar to the softmmu move except we take the
time to split stuff between user.c and user-target.c to avoid as much
target specific compilation as possible. We also start to make use of
our shiny new header scheme so the user-only helpers can be included
without the rest of the exec/gsbstub.h cruft.
As before we split some functions into user and softmmu versions
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
v2
- separate splitting of functions
- create user.h here
v3
- rebase cleanups
---
MAINTAINERS | 1 +
gdbstub/internals.h | 18 ++
include/exec/gdbstub.h | 21 --
include/gdbstub/user.h | 43 +++
gdbstub/gdbstub.c | 676 +----------------------------------------
gdbstub/softmmu.c | 89 ++++++
gdbstub/user-target.c | 281 +++++++++++++++++
gdbstub/user.c | 338 +++++++++++++++++++++
linux-user/main.c | 1 +
linux-user/signal.c | 2 +-
gdbstub/meson.build | 3 +
11 files changed, 779 insertions(+), 694 deletions(-)
create mode 100644 include/gdbstub/user.h
create mode 100644 gdbstub/user-target.c
diff --git a/MAINTAINERS b/MAINTAINERS
index fdc9621ecd..c3711169d7 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2729,6 +2729,7 @@ S: Maintained
F: docs/system/gdb.rst
F: gdbstub/*
F: include/exec/gdbstub.h
+F: include/gdbstub/*
F: gdb-xml/
F: tests/tcg/multiarch/gdbstub/
F: scripts/feature_to_c.sh
diff --git a/gdbstub/internals.h b/gdbstub/internals.h
index c889f52beb..a3dd629ee8 100644
--- a/gdbstub/internals.h
+++ b/gdbstub/internals.h
@@ -115,6 +115,22 @@ int gdb_get_cpu_index(CPUState *cpu);
void gdb_create_default_process(GDBState *s);
+/* signal mapping, common for softmmu, specialised for user-mode */
+int gdb_signal_to_target(int sig);
+int gdb_target_signal_to_gdb(int sig);
+
+int gdb_get_char(void); /* user only */
+
+/**
+ * gdb_continue() - handle continue in mode specific way.
+ */
+void gdb_continue(void);
+
+/**
+ * gdb_continue_partial() - handle partial continue in mode specific way.
+ */
+int gdb_continue_partial(char *newstates);
+
/*
* Helpers with separate softmmu and user implementations
*/
@@ -147,6 +163,8 @@ typedef union GdbCmdVariant {
#define get_param(p, i) (&g_array_index(p, GdbCmdVariant, i))
void gdb_handle_query_rcmd(GArray *params, void *user_ctx); /* softmmu */
+void gdb_handle_query_offsets(GArray *params, void *user_ctx); /* user */
+void gdb_handle_query_xfer_auxv(GArray *params, void *user_ctx); /*user */
/*
* Break/Watch point support - there is an implementation for softmmu
diff --git a/include/exec/gdbstub.h b/include/exec/gdbstub.h
index 1636fb3841..8fff5450ed 100644
--- a/include/exec/gdbstub.h
+++ b/include/exec/gdbstub.h
@@ -103,27 +103,6 @@ void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...);
void gdb_do_syscallv(gdb_syscall_complete_cb cb, const char *fmt, va_list va);
int use_gdb_syscalls(void);
-#ifdef CONFIG_USER_ONLY
-/**
- * gdb_handlesig: yield control to gdb
- * @cpu: CPU
- * @sig: if non-zero, the signal number which caused us to stop
- *
- * This function yields control to gdb, when a user-mode-only target
- * needs to stop execution. If @sig is non-zero, then we will send a
- * stop packet to tell gdb that we have stopped because of this signal.
- *
- * This function will block (handling protocol requests from gdb)
- * until gdb tells us to continue target execution. When it does
- * return, the return value is a signal to deliver to the target,
- * or 0 if no signal should be delivered, ie the signal that caused
- * us to stop should be ignored.
- */
-int gdb_handlesig(CPUState *, int);
-void gdb_signalled(CPUArchState *, int);
-void gdbserver_fork(CPUState *);
-#endif
-
/* Get or set a register. Returns the size of the register. */
typedef int (*gdb_get_reg_cb)(CPUArchState *env, GByteArray *buf, int reg);
typedef int (*gdb_set_reg_cb)(CPUArchState *env, uint8_t *buf, int reg);
diff --git a/include/gdbstub/user.h b/include/gdbstub/user.h
new file mode 100644
index 0000000000..d392e510c5
--- /dev/null
+++ b/include/gdbstub/user.h
@@ -0,0 +1,43 @@
+/*
+ * gdbstub user-mode only APIs
+ *
+ * Copyright (c) 2022 Linaro Ltd
+ *
+ * SPDX-License-Identifier: LGPL-2.0+
+ */
+
+#ifndef GDBSTUB_USER_H
+#define GDBSTUB_USER_H
+
+/**
+ * gdb_handlesig() - yield control to gdb
+ * @cpu: CPU
+ * @sig: if non-zero, the signal number which caused us to stop
+ *
+ * This function yields control to gdb, when a user-mode-only target
+ * needs to stop execution. If @sig is non-zero, then we will send a
+ * stop packet to tell gdb that we have stopped because of this signal.
+ *
+ * This function will block (handling protocol requests from gdb)
+ * until gdb tells us to continue target execution. When it does
+ * return, the return value is a signal to deliver to the target,
+ * or 0 if no signal should be delivered, ie the signal that caused
+ * us to stop should be ignored.
+ */
+int gdb_handlesig(CPUState *, int);
+
+/**
+ * gdb_signalled() - inform remote gdb of sig exit
+ * @as: current CPUArchState
+ * @sig: signal number
+ */
+void gdb_signalled(CPUArchState *as, int sig);
+
+/**
+ * gdbserver_fork() - disable gdb stub for child processes.
+ * @cs: CPU
+ */
+void gdbserver_fork(CPUState *cs);
+
+
+#endif /* GDBSTUB_USER_H */
diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c
index 817fe5e61a..4bf99783a6 100644
--- a/gdbstub/gdbstub.c
+++ b/gdbstub/gdbstub.c
@@ -30,13 +30,12 @@
#include "trace.h"
#include "exec/gdbstub.h"
#ifdef CONFIG_USER_ONLY
-#include "qemu.h"
+#include "gdbstub/user.h"
#else
#include "hw/cpu/cluster.h"
#include "hw/boards.h"
#endif
-#include "qemu/sockets.h"
#include "sysemu/hw_accel.h"
#include "sysemu/runstate.h"
#include "semihosting/semihost.h"
@@ -80,223 +79,6 @@ static inline int target_memory_rw_debug(CPUState *cpu, target_ulong addr,
return cpu_memory_rw_debug(cpu, addr, buf, len, is_write);
}
-/*
- * Return the GDB index for a given vCPU state.
- *
- * For user mode this is simply the thread id.
- */
-#if defined(CONFIG_USER_ONLY)
-int gdb_get_cpu_index(CPUState *cpu)
-{
- TaskState *ts = (TaskState *) cpu->opaque;
- return ts ? ts->ts_tid : -1;
-}
-#endif
-
-#ifdef CONFIG_USER_ONLY
-
-/* Map target signal numbers to GDB protocol signal numbers and vice
- * versa. For user emulation's currently supported systems, we can
- * assume most signals are defined.
- */
-
-static int gdb_signal_table[] = {
- 0,
- TARGET_SIGHUP,
- TARGET_SIGINT,
- TARGET_SIGQUIT,
- TARGET_SIGILL,
- TARGET_SIGTRAP,
- TARGET_SIGABRT,
- -1, /* SIGEMT */
- TARGET_SIGFPE,
- TARGET_SIGKILL,
- TARGET_SIGBUS,
- TARGET_SIGSEGV,
- TARGET_SIGSYS,
- TARGET_SIGPIPE,
- TARGET_SIGALRM,
- TARGET_SIGTERM,
- TARGET_SIGURG,
- TARGET_SIGSTOP,
- TARGET_SIGTSTP,
- TARGET_SIGCONT,
- TARGET_SIGCHLD,
- TARGET_SIGTTIN,
- TARGET_SIGTTOU,
- TARGET_SIGIO,
- TARGET_SIGXCPU,
- TARGET_SIGXFSZ,
- TARGET_SIGVTALRM,
- TARGET_SIGPROF,
- TARGET_SIGWINCH,
- -1, /* SIGLOST */
- TARGET_SIGUSR1,
- TARGET_SIGUSR2,
-#ifdef TARGET_SIGPWR
- TARGET_SIGPWR,
-#else
- -1,
-#endif
- -1, /* SIGPOLL */
- -1,
- -1,
- -1,
- -1,
- -1,
- -1,
- -1,
- -1,
- -1,
- -1,
- -1,
-#ifdef __SIGRTMIN
- __SIGRTMIN + 1,
- __SIGRTMIN + 2,
- __SIGRTMIN + 3,
- __SIGRTMIN + 4,
- __SIGRTMIN + 5,
- __SIGRTMIN + 6,
- __SIGRTMIN + 7,
- __SIGRTMIN + 8,
- __SIGRTMIN + 9,
- __SIGRTMIN + 10,
- __SIGRTMIN + 11,
- __SIGRTMIN + 12,
- __SIGRTMIN + 13,
- __SIGRTMIN + 14,
- __SIGRTMIN + 15,
- __SIGRTMIN + 16,
- __SIGRTMIN + 17,
- __SIGRTMIN + 18,
- __SIGRTMIN + 19,
- __SIGRTMIN + 20,
- __SIGRTMIN + 21,
- __SIGRTMIN + 22,
- __SIGRTMIN + 23,
- __SIGRTMIN + 24,
- __SIGRTMIN + 25,
- __SIGRTMIN + 26,
- __SIGRTMIN + 27,
- __SIGRTMIN + 28,
- __SIGRTMIN + 29,
- __SIGRTMIN + 30,
- __SIGRTMIN + 31,
- -1, /* SIGCANCEL */
- __SIGRTMIN,
- __SIGRTMIN + 32,
- __SIGRTMIN + 33,
- __SIGRTMIN + 34,
- __SIGRTMIN + 35,
- __SIGRTMIN + 36,
- __SIGRTMIN + 37,
- __SIGRTMIN + 38,
- __SIGRTMIN + 39,
- __SIGRTMIN + 40,
- __SIGRTMIN + 41,
- __SIGRTMIN + 42,
- __SIGRTMIN + 43,
- __SIGRTMIN + 44,
- __SIGRTMIN + 45,
- __SIGRTMIN + 46,
- __SIGRTMIN + 47,
- __SIGRTMIN + 48,
- __SIGRTMIN + 49,
- __SIGRTMIN + 50,
- __SIGRTMIN + 51,
- __SIGRTMIN + 52,
- __SIGRTMIN + 53,
- __SIGRTMIN + 54,
- __SIGRTMIN + 55,
- __SIGRTMIN + 56,
- __SIGRTMIN + 57,
- __SIGRTMIN + 58,
- __SIGRTMIN + 59,
- __SIGRTMIN + 60,
- __SIGRTMIN + 61,
- __SIGRTMIN + 62,
- __SIGRTMIN + 63,
- __SIGRTMIN + 64,
- __SIGRTMIN + 65,
- __SIGRTMIN + 66,
- __SIGRTMIN + 67,
- __SIGRTMIN + 68,
- __SIGRTMIN + 69,
- __SIGRTMIN + 70,
- __SIGRTMIN + 71,
- __SIGRTMIN + 72,
- __SIGRTMIN + 73,
- __SIGRTMIN + 74,
- __SIGRTMIN + 75,
- __SIGRTMIN + 76,
- __SIGRTMIN + 77,
- __SIGRTMIN + 78,
- __SIGRTMIN + 79,
- __SIGRTMIN + 80,
- __SIGRTMIN + 81,
- __SIGRTMIN + 82,
- __SIGRTMIN + 83,
- __SIGRTMIN + 84,
- __SIGRTMIN + 85,
- __SIGRTMIN + 86,
- __SIGRTMIN + 87,
- __SIGRTMIN + 88,
- __SIGRTMIN + 89,
- __SIGRTMIN + 90,
- __SIGRTMIN + 91,
- __SIGRTMIN + 92,
- __SIGRTMIN + 93,
- __SIGRTMIN + 94,
- __SIGRTMIN + 95,
- -1, /* SIGINFO */
- -1, /* UNKNOWN */
- -1, /* DEFAULT */
- -1,
- -1,
- -1,
- -1,
- -1,
- -1
-#endif
-};
-#else
-/* In system mode we only need SIGINT and SIGTRAP; other signals
- are not yet supported. */
-
-enum {
- TARGET_SIGINT = 2,
- TARGET_SIGTRAP = 5
-};
-
-static int gdb_signal_table[] = {
- -1,
- -1,
- TARGET_SIGINT,
- -1,
- -1,
- TARGET_SIGTRAP
-};
-#endif
-
-#ifdef CONFIG_USER_ONLY
-static int target_signal_to_gdb (int sig)
-{
- int i;
- for (i = 0; i < ARRAY_SIZE (gdb_signal_table); i++)
- if (gdb_signal_table[i] == sig)
- return i;
- return GDB_SIGNAL_UNKNOWN;
-}
-#endif
-
-static int gdb_signal_to_target (int sig)
-{
- if (sig < ARRAY_SIZE (gdb_signal_table))
- return gdb_signal_table[sig];
- else
- return -1;
-}
-
typedef struct GDBRegisterState {
int base_reg;
int num_regs;
@@ -306,15 +88,6 @@ typedef struct GDBRegisterState {
struct GDBRegisterState *next;
} GDBRegisterState;
-#ifdef CONFIG_USER_ONLY
-typedef struct {
- int fd;
- char *socket_path;
- int running_state;
-} GDBUserState;
-static GDBUserState gdbserver_user_state;
-#endif
-
GDBState gdbserver_state;
void gdb_init_gdbserver_state(void)
@@ -338,34 +111,6 @@ void gdb_init_gdbserver_state(void)
bool gdb_has_xml;
-#ifdef CONFIG_USER_ONLY
-
-static int get_char(void)
-{
- uint8_t ch;
- int ret;
-
- for(;;) {
- ret = recv(gdbserver_user_state.fd, &ch, 1, 0);
- if (ret < 0) {
- if (errno == ECONNRESET) {
- gdbserver_user_state.fd = -1;
- }
- if (errno != EINTR) {
- return -1;
- }
- } else if (ret == 0) {
- close(gdbserver_user_state.fd);
- gdbserver_user_state.fd = -1;
- return -1;
- } else {
- break;
- }
- }
- return ch;
-}
-#endif
-
/*
* Return true if there is a GDB currently connected to the stub
* and attached to a CPU
@@ -410,104 +155,6 @@ static bool stub_can_reverse(void)
#endif
}
-/* Resume execution. */
-static void gdb_continue(void)
-{
-
-#ifdef CONFIG_USER_ONLY
- gdbserver_user_state.running_state = 1;
- trace_gdbstub_op_continue();
-#else
- if (!runstate_needs_reset()) {
- trace_gdbstub_op_continue();
- vm_start();
- }
-#endif
-}
-
-/*
- * Resume execution, per CPU actions. For user-mode emulation it's
- * equivalent to gdb_continue.
- */
-static int gdb_continue_partial(char *newstates)
-{
- CPUState *cpu;
- int res = 0;
-#ifdef CONFIG_USER_ONLY
- /*
- * This is not exactly accurate, but it's an improvement compared to the
- * previous situation, where only one CPU would be single-stepped.
- */
- CPU_FOREACH(cpu) {
- if (newstates[cpu->cpu_index] == 's') {
- trace_gdbstub_op_stepping(cpu->cpu_index);
- cpu_single_step(cpu, gdbserver_state.sstep_flags);
- }
- }
- gdbserver_user_state.running_state = 1;
-#else
- int flag = 0;
-
- if (!runstate_needs_reset()) {
- bool step_requested = false;
- CPU_FOREACH(cpu) {
- if (newstates[cpu->cpu_index] == 's') {
- step_requested = true;
- break;
- }
- }
-
- if (vm_prepare_start(step_requested)) {
- return 0;
- }
-
- CPU_FOREACH(cpu) {
- switch (newstates[cpu->cpu_index]) {
- case 0:
- case 1:
- break; /* nothing to do here */
- case 's':
- trace_gdbstub_op_stepping(cpu->cpu_index);
- cpu_single_step(cpu, gdbserver_state.sstep_flags);
- cpu_resume(cpu);
- flag = 1;
- break;
- case 'c':
- trace_gdbstub_op_continue_cpu(cpu->cpu_index);
- cpu_resume(cpu);
- flag = 1;
- break;
- default:
- res = -1;
- break;
- }
- }
- }
- if (flag) {
- qemu_clock_enable(QEMU_CLOCK_VIRTUAL, true);
- }
-#endif
- return res;
-}
-
-#ifdef CONFIG_USER_ONLY
-void gdb_put_buffer(const uint8_t *buf, int len)
-{
- int ret;
-
- while (len > 0) {
- ret = send(gdbserver_user_state.fd, buf, len, 0);
- if (ret < 0) {
- if (errno != EINTR)
- return;
- } else {
- buf += ret;
- len -= ret;
- }
- }
-}
-#endif
-
/* writes 2*len+1 bytes in buf */
void gdb_memtohex(GString *buf, const uint8_t *mem, int len)
{
@@ -593,7 +240,7 @@ int gdb_put_packet_binary(const char *buf, int len, bool dump)
gdbserver_state.last_packet->len);
#ifdef CONFIG_USER_ONLY
- i = get_char();
+ i = gdb_get_char();
if (i < 0)
return -1;
if (i == '+')
@@ -1949,23 +1596,6 @@ static void handle_query_thread_extra(GArray *params, void *user_ctx)
gdb_put_strbuf();
}
-#ifdef CONFIG_USER_ONLY
-static void handle_query_offsets(GArray *params, void *user_ctx)
-{
- TaskState *ts;
-
- ts = gdbserver_state.c_cpu->opaque;
- g_string_printf(gdbserver_state.str_buf,
- "Text=" TARGET_ABI_FMT_lx
- ";Data=" TARGET_ABI_FMT_lx
- ";Bss=" TARGET_ABI_FMT_lx,
- ts->info->code_offset,
- ts->info->data_offset,
- ts->info->data_offset);
- gdb_put_strbuf();
-}
-#endif
-
static void handle_query_supported(GArray *params, void *user_ctx)
{
CPUClass *cc;
@@ -2048,53 +1678,6 @@ static void handle_query_xfer_features(GArray *params, void *user_ctx)
gdbserver_state.str_buf->len, true);
}
-#if defined(CONFIG_USER_ONLY) && defined(CONFIG_LINUX_USER)
-static void handle_query_xfer_auxv(GArray *params, void *user_ctx)
-{
- TaskState *ts;
- unsigned long offset, len, saved_auxv, auxv_len;
-
- if (params->len < 2) {
- gdb_put_packet("E22");
- return;
- }
-
- offset = get_param(params, 0)->val_ul;
- len = get_param(params, 1)->val_ul;
- ts = gdbserver_state.c_cpu->opaque;
- saved_auxv = ts->info->saved_auxv;
- auxv_len = ts->info->auxv_len;
-
- if (offset >= auxv_len) {
- gdb_put_packet("E00");
- return;
- }
-
- if (len > (MAX_PACKET_LENGTH - 5) / 2) {
- len = (MAX_PACKET_LENGTH - 5) / 2;
- }
-
- if (len < auxv_len - offset) {
- g_string_assign(gdbserver_state.str_buf, "m");
- } else {
- g_string_assign(gdbserver_state.str_buf, "l");
- len = auxv_len - offset;
- }
-
- g_byte_array_set_size(gdbserver_state.mem_buf, len);
- if (target_memory_rw_debug(gdbserver_state.g_cpu, saved_auxv + offset,
- gdbserver_state.mem_buf->data, len, false)) {
- gdb_put_packet("E14");
- return;
- }
-
- gdb_memtox(gdbserver_state.str_buf,
- (const char *)gdbserver_state.mem_buf->data, len);
- gdb_put_packet_binary(gdbserver_state.str_buf->str,
- gdbserver_state.str_buf->len, true);
-}
-#endif
-
static void handle_query_attached(GArray *params, void *user_ctx)
{
gdb_put_packet(GDB_ATTACHED);
@@ -2172,7 +1755,7 @@ static const GdbCmdParseEntry gdb_gen_query_table[] = {
},
#ifdef CONFIG_USER_ONLY
{
- .handler = handle_query_offsets,
+ .handler = gdb_handle_query_offsets,
.cmd = "Offsets",
},
#else
@@ -2202,7 +1785,7 @@ static const GdbCmdParseEntry gdb_gen_query_table[] = {
},
#if defined(CONFIG_USER_ONLY) && defined(CONFIG_LINUX_USER)
{
- .handler = handle_query_xfer_auxv,
+ .handler = gdb_handle_query_xfer_auxv,
.cmd = "Xfer:auxv:read::",
.cmd_startswith = 1,
.schema = "l,l0"
@@ -2790,29 +2373,6 @@ void gdb_read_byte(uint8_t ch)
}
}
-#ifdef CONFIG_USER_ONLY
-/* Tell the remote gdb that the process has exited. */
-void gdb_exit(int code)
-{
- char buf[4];
-
- if (!gdbserver_state.init) {
- return;
- }
- if (gdbserver_user_state.socket_path) {
- unlink(gdbserver_user_state.socket_path);
- }
- if (gdbserver_user_state.fd < 0) {
- return;
- }
-
- trace_gdbstub_op_exiting((uint8_t)code);
-
- snprintf(buf, sizeof(buf), "W%02x", (uint8_t)code);
- gdb_put_packet(buf);
-}
-#endif
-
/*
* Create the process that will contain all the "orphan" CPUs (that are not
* part of a CPU cluster). Note that if this process contains no CPUs, it won't
@@ -2838,231 +2398,3 @@ void gdb_create_default_process(GDBState *s)
process->target_xml[0] = '\0';
}
-#ifdef CONFIG_USER_ONLY
-int
-gdb_handlesig(CPUState *cpu, int sig)
-{
- char buf[256];
- int n;
-
- if (!gdbserver_state.init || gdbserver_user_state.fd < 0) {
- return sig;
- }
-
- /* disable single step if it was enabled */
- cpu_single_step(cpu, 0);
- tb_flush(cpu);
-
- if (sig != 0) {
- gdb_set_stop_cpu(cpu);
- g_string_printf(gdbserver_state.str_buf,
- "T%02xthread:", target_signal_to_gdb(sig));
- gdb_append_thread_id(cpu, gdbserver_state.str_buf);
- g_string_append_c(gdbserver_state.str_buf, ';');
- gdb_put_strbuf();
- }
- /* gdb_put_packet() might have detected that the peer terminated the
- connection. */
- if (gdbserver_user_state.fd < 0) {
- return sig;
- }
-
- sig = 0;
- gdbserver_state.state = RS_IDLE;
- gdbserver_user_state.running_state = 0;
- while (gdbserver_user_state.running_state == 0) {
- n = read(gdbserver_user_state.fd, buf, 256);
- if (n > 0) {
- int i;
-
- for (i = 0; i < n; i++) {
- gdb_read_byte(buf[i]);
- }
- } else {
- /* XXX: Connection closed. Should probably wait for another
- connection before continuing. */
- if (n == 0) {
- close(gdbserver_user_state.fd);
- }
- gdbserver_user_state.fd = -1;
- return sig;
- }
- }
- sig = gdbserver_state.signal;
- gdbserver_state.signal = 0;
- return sig;
-}
-
-/* Tell the remote gdb that the process has exited due to SIG. */
-void gdb_signalled(CPUArchState *env, int sig)
-{
- char buf[4];
-
- if (!gdbserver_state.init || gdbserver_user_state.fd < 0) {
- return;
- }
-
- snprintf(buf, sizeof(buf), "X%02x", target_signal_to_gdb(sig));
- gdb_put_packet(buf);
-}
-
-static void gdb_accept_init(int fd)
-{
- gdb_init_gdbserver_state();
- gdb_create_default_process(&gdbserver_state);
- gdbserver_state.processes[0].attached = true;
- gdbserver_state.c_cpu = gdb_first_attached_cpu();
- gdbserver_state.g_cpu = gdbserver_state.c_cpu;
- gdbserver_user_state.fd = fd;
- gdb_has_xml = false;
-}
-
-static bool gdb_accept_socket(int gdb_fd)
-{
- int fd;
-
- for(;;) {
- fd = accept(gdb_fd, NULL, NULL);
- if (fd < 0 && errno != EINTR) {
- perror("accept socket");
- return false;
- } else if (fd >= 0) {
- qemu_set_cloexec(fd);
- break;
- }
- }
-
- gdb_accept_init(fd);
- return true;
-}
-
-static int gdbserver_open_socket(const char *path)
-{
- struct sockaddr_un sockaddr = {};
- int fd, ret;
-
- fd = socket(AF_UNIX, SOCK_STREAM, 0);
- if (fd < 0) {
- perror("create socket");
- return -1;
- }
-
- sockaddr.sun_family = AF_UNIX;
- pstrcpy(sockaddr.sun_path, sizeof(sockaddr.sun_path) - 1, path);
- ret = bind(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr));
- if (ret < 0) {
- perror("bind socket");
- close(fd);
- return -1;
- }
- ret = listen(fd, 1);
- if (ret < 0) {
- perror("listen socket");
- close(fd);
- return -1;
- }
-
- return fd;
-}
-
-static bool gdb_accept_tcp(int gdb_fd)
-{
- struct sockaddr_in sockaddr = {};
- socklen_t len;
- int fd;
-
- for(;;) {
- len = sizeof(sockaddr);
- fd = accept(gdb_fd, (struct sockaddr *)&sockaddr, &len);
- if (fd < 0 && errno != EINTR) {
- perror("accept");
- return false;
- } else if (fd >= 0) {
- qemu_set_cloexec(fd);
- break;
- }
- }
-
- /* set short latency */
- if (socket_set_nodelay(fd)) {
- perror("setsockopt");
- close(fd);
- return false;
- }
-
- gdb_accept_init(fd);
- return true;
-}
-
-static int gdbserver_open_port(int port)
-{
- struct sockaddr_in sockaddr;
- int fd, ret;
-
- fd = socket(PF_INET, SOCK_STREAM, 0);
- if (fd < 0) {
- perror("socket");
- return -1;
- }
- qemu_set_cloexec(fd);
-
- socket_set_fast_reuse(fd);
-
- sockaddr.sin_family = AF_INET;
- sockaddr.sin_port = htons(port);
- sockaddr.sin_addr.s_addr = 0;
- ret = bind(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr));
- if (ret < 0) {
- perror("bind");
- close(fd);
- return -1;
- }
- ret = listen(fd, 1);
- if (ret < 0) {
- perror("listen");
- close(fd);
- return -1;
- }
-
- return fd;
-}
-
-int gdbserver_start(const char *port_or_path)
-{
- int port = g_ascii_strtoull(port_or_path, NULL, 10);
- int gdb_fd;
-
- if (port > 0) {
- gdb_fd = gdbserver_open_port(port);
- } else {
- gdb_fd = gdbserver_open_socket(port_or_path);
- }
-
- if (gdb_fd < 0) {
- return -1;
- }
-
- if (port > 0 && gdb_accept_tcp(gdb_fd)) {
- return 0;
- } else if (gdb_accept_socket(gdb_fd)) {
- gdbserver_user_state.socket_path = g_strdup(port_or_path);
- return 0;
- }
-
- /* gone wrong */
- close(gdb_fd);
- return -1;
-}
-
-/* Disable gdb stub for child processes. */
-void gdbserver_fork(CPUState *cpu)
-{
- if (!gdbserver_state.init || gdbserver_user_state.fd < 0) {
- return;
- }
- close(gdbserver_user_state.fd);
- gdbserver_user_state.fd = -1;
- cpu_breakpoint_remove_all(cpu, BP_GDB);
- cpu_watchpoint_remove_all(cpu, BP_GDB);
-}
-#endif
diff --git a/gdbstub/softmmu.c b/gdbstub/softmmu.c
index 0be5511ea7..864ecee38f 100644
--- a/gdbstub/softmmu.c
+++ b/gdbstub/softmmu.c
@@ -427,6 +427,95 @@ void gdb_handle_query_rcmd(GArray *params, void *user_ctx)
gdb_put_packet("OK");
}
+/*
+ * Execution state helpers
+ */
+
+void gdb_continue(void)
+{
+ if (!runstate_needs_reset()) {
+ trace_gdbstub_op_continue();
+ vm_start();
+ }
+}
+
+/*
+ * Resume execution, per CPU actions.
+ */
+int gdb_continue_partial(char *newstates)
+{
+ CPUState *cpu;
+ int res = 0;
+ int flag = 0;
+
+ if (!runstate_needs_reset()) {
+ bool step_requested = false;
+ CPU_FOREACH(cpu) {
+ if (newstates[cpu->cpu_index] == 's') {
+ step_requested = true;
+ break;
+ }
+ }
+
+ if (vm_prepare_start(step_requested)) {
+ return 0;
+ }
+
+ CPU_FOREACH(cpu) {
+ switch (newstates[cpu->cpu_index]) {
+ case 0:
+ case 1:
+ break; /* nothing to do here */
+ case 's':
+ trace_gdbstub_op_stepping(cpu->cpu_index);
+ cpu_single_step(cpu, gdbserver_state.sstep_flags);
+ cpu_resume(cpu);
+ flag = 1;
+ break;
+ case 'c':
+ trace_gdbstub_op_continue_cpu(cpu->cpu_index);
+ cpu_resume(cpu);
+ flag = 1;
+ break;
+ default:
+ res = -1;
+ break;
+ }
+ }
+ }
+ if (flag) {
+ qemu_clock_enable(QEMU_CLOCK_VIRTUAL, true);
+ }
+ return res;
+}
+
+/*
+ * Signal Handling - in system mode we only need SIGINT and SIGTRAP; other
+ * signals are not yet supported.
+ */
+
+enum {
+ TARGET_SIGINT = 2,
+ TARGET_SIGTRAP = 5
+};
+
+static int gdb_signal_table[] = {
+ -1,
+ -1,
+ TARGET_SIGINT,
+ -1,
+ -1,
+ TARGET_SIGTRAP
+};
+
+int gdb_signal_to_target (int sig)
+{
+ if (sig < ARRAY_SIZE (gdb_signal_table))
+ return gdb_signal_table[sig];
+ else
+ return -1;
+}
+
/*
* Break/Watch point helpers
*/
diff --git a/gdbstub/user-target.c b/gdbstub/user-target.c
new file mode 100644
index 0000000000..e1d9650c1e
--- /dev/null
+++ b/gdbstub/user-target.c
@@ -0,0 +1,281 @@
+/*
+ * Target specific user-mode handling
+ *
+ * Copyright (c) 2003-2005 Fabrice Bellard
+ * Copyright (c) 2022 Linaro Ltd
+ *
+ * SPDX-License-Identifier: LGPL-2.0+
+ */
+
+#include "qemu/osdep.h"
+#include "exec/gdbstub.h"
+#include "qemu.h"
+#include "internals.h"
+
+/*
+ * Map target signal numbers to GDB protocol signal numbers and vice
+ * versa. For user emulation's currently supported systems, we can
+ * assume most signals are defined.
+ */
+
+static int gdb_signal_table[] = {
+ 0,
+ TARGET_SIGHUP,
+ TARGET_SIGINT,
+ TARGET_SIGQUIT,
+ TARGET_SIGILL,
+ TARGET_SIGTRAP,
+ TARGET_SIGABRT,
+ -1, /* SIGEMT */
+ TARGET_SIGFPE,
+ TARGET_SIGKILL,
+ TARGET_SIGBUS,
+ TARGET_SIGSEGV,
+ TARGET_SIGSYS,
+ TARGET_SIGPIPE,
+ TARGET_SIGALRM,
+ TARGET_SIGTERM,
+ TARGET_SIGURG,
+ TARGET_SIGSTOP,
+ TARGET_SIGTSTP,
+ TARGET_SIGCONT,
+ TARGET_SIGCHLD,
+ TARGET_SIGTTIN,
+ TARGET_SIGTTOU,
+ TARGET_SIGIO,
+ TARGET_SIGXCPU,
+ TARGET_SIGXFSZ,
+ TARGET_SIGVTALRM,
+ TARGET_SIGPROF,
+ TARGET_SIGWINCH,
+ -1, /* SIGLOST */
+ TARGET_SIGUSR1,
+ TARGET_SIGUSR2,
+#ifdef TARGET_SIGPWR
+ TARGET_SIGPWR,
+#else
+ -1,
+#endif
+ -1, /* SIGPOLL */
+ -1,
+ -1,
+ -1,
+ -1,
+ -1,
+ -1,
+ -1,
+ -1,
+ -1,
+ -1,
+ -1,
+#ifdef __SIGRTMIN
+ __SIGRTMIN + 1,
+ __SIGRTMIN + 2,
+ __SIGRTMIN + 3,
+ __SIGRTMIN + 4,
+ __SIGRTMIN + 5,
+ __SIGRTMIN + 6,
+ __SIGRTMIN + 7,
+ __SIGRTMIN + 8,
+ __SIGRTMIN + 9,
+ __SIGRTMIN + 10,
+ __SIGRTMIN + 11,
+ __SIGRTMIN + 12,
+ __SIGRTMIN + 13,
+ __SIGRTMIN + 14,
+ __SIGRTMIN + 15,
+ __SIGRTMIN + 16,
+ __SIGRTMIN + 17,
+ __SIGRTMIN + 18,
+ __SIGRTMIN + 19,
+ __SIGRTMIN + 20,
+ __SIGRTMIN + 21,
+ __SIGRTMIN + 22,
+ __SIGRTMIN + 23,
+ __SIGRTMIN + 24,
+ __SIGRTMIN + 25,
+ __SIGRTMIN + 26,
+ __SIGRTMIN + 27,
+ __SIGRTMIN + 28,
+ __SIGRTMIN + 29,
+ __SIGRTMIN + 30,
+ __SIGRTMIN + 31,
+ -1, /* SIGCANCEL */
+ __SIGRTMIN,
+ __SIGRTMIN + 32,
+ __SIGRTMIN + 33,
+ __SIGRTMIN + 34,
+ __SIGRTMIN + 35,
+ __SIGRTMIN + 36,
+ __SIGRTMIN + 37,
+ __SIGRTMIN + 38,
+ __SIGRTMIN + 39,
+ __SIGRTMIN + 40,
+ __SIGRTMIN + 41,
+ __SIGRTMIN + 42,
+ __SIGRTMIN + 43,
+ __SIGRTMIN + 44,
+ __SIGRTMIN + 45,
+ __SIGRTMIN + 46,
+ __SIGRTMIN + 47,
+ __SIGRTMIN + 48,
+ __SIGRTMIN + 49,
+ __SIGRTMIN + 50,
+ __SIGRTMIN + 51,
+ __SIGRTMIN + 52,
+ __SIGRTMIN + 53,
+ __SIGRTMIN + 54,
+ __SIGRTMIN + 55,
+ __SIGRTMIN + 56,
+ __SIGRTMIN + 57,
+ __SIGRTMIN + 58,
+ __SIGRTMIN + 59,
+ __SIGRTMIN + 60,
+ __SIGRTMIN + 61,
+ __SIGRTMIN + 62,
+ __SIGRTMIN + 63,
+ __SIGRTMIN + 64,
+ __SIGRTMIN + 65,
+ __SIGRTMIN + 66,
+ __SIGRTMIN + 67,
+ __SIGRTMIN + 68,
+ __SIGRTMIN + 69,
+ __SIGRTMIN + 70,
+ __SIGRTMIN + 71,
+ __SIGRTMIN + 72,
+ __SIGRTMIN + 73,
+ __SIGRTMIN + 74,
+ __SIGRTMIN + 75,
+ __SIGRTMIN + 76,
+ __SIGRTMIN + 77,
+ __SIGRTMIN + 78,
+ __SIGRTMIN + 79,
+ __SIGRTMIN + 80,
+ __SIGRTMIN + 81,
+ __SIGRTMIN + 82,
+ __SIGRTMIN + 83,
+ __SIGRTMIN + 84,
+ __SIGRTMIN + 85,
+ __SIGRTMIN + 86,
+ __SIGRTMIN + 87,
+ __SIGRTMIN + 88,
+ __SIGRTMIN + 89,
+ __SIGRTMIN + 90,
+ __SIGRTMIN + 91,
+ __SIGRTMIN + 92,
+ __SIGRTMIN + 93,
+ __SIGRTMIN + 94,
+ __SIGRTMIN + 95,
+ -1, /* SIGINFO */
+ -1, /* UNKNOWN */
+ -1, /* DEFAULT */
+ -1,
+ -1,
+ -1,
+ -1,
+ -1,
+ -1
+#endif
+};
+
+int gdb_signal_to_target (int sig)
+{
+ if (sig < ARRAY_SIZE (gdb_signal_table))
+ return gdb_signal_table[sig];
+ else
+ return -1;
+}
+
+int gdb_target_signal_to_gdb(int sig)
+{
+ int i;
+ for (i = 0; i < ARRAY_SIZE (gdb_signal_table); i++)
+ if (gdb_signal_table[i] == sig)
+ return i;
+ return GDB_SIGNAL_UNKNOWN;
+}
+
+int gdb_get_cpu_index(CPUState *cpu)
+{
+ TaskState *ts = (TaskState *) cpu->opaque;
+ return ts ? ts->ts_tid : -1;
+}
+
+/*
+ * User-mode specific command helpers
+ */
+
+void gdb_handle_query_offsets(GArray *params, void *user_ctx)
+{
+ TaskState *ts;
+
+ ts = gdbserver_state.c_cpu->opaque;
+ g_string_printf(gdbserver_state.str_buf,
+ "Text=" TARGET_ABI_FMT_lx
+ ";Data=" TARGET_ABI_FMT_lx
+ ";Bss=" TARGET_ABI_FMT_lx,
+ ts->info->code_offset,
+ ts->info->data_offset,
+ ts->info->data_offset);
+ gdb_put_strbuf();
+}
+
+/* Partial user only duplicate of helper in gdbstub.c */
+static inline int target_memory_rw_debug(CPUState *cpu, target_ulong addr,
+ uint8_t *buf, int len, bool is_write)
+{
+ CPUClass *cc;
+ cc = CPU_GET_CLASS(cpu);
+ if (cc->memory_rw_debug) {
+ return cc->memory_rw_debug(cpu, addr, buf, len, is_write);
+ }
+ return cpu_memory_rw_debug(cpu, addr, buf, len, is_write);
+}
+
+
+#if defined(CONFIG_LINUX_USER)
+void gdb_handle_query_xfer_auxv(GArray *params, void *user_ctx)
+{
+ TaskState *ts;
+ unsigned long offset, len, saved_auxv, auxv_len;
+
+ if (params->len < 2) {
+ gdb_put_packet("E22");
+ return;
+ }
+
+ offset = get_param(params, 0)->val_ul;
+ len = get_param(params, 1)->val_ul;
+ ts = gdbserver_state.c_cpu->opaque;
+ saved_auxv = ts->info->saved_auxv;
+ auxv_len = ts->info->auxv_len;
+
+ if (offset >= auxv_len) {
+ gdb_put_packet("E00");
+ return;
+ }
+
+ if (len > (MAX_PACKET_LENGTH - 5) / 2) {
+ len = (MAX_PACKET_LENGTH - 5) / 2;
+ }
+
+ if (len < auxv_len - offset) {
+ g_string_assign(gdbserver_state.str_buf, "m");
+ } else {
+ g_string_assign(gdbserver_state.str_buf, "l");
+ len = auxv_len - offset;
+ }
+
+ g_byte_array_set_size(gdbserver_state.mem_buf, len);
+ if (target_memory_rw_debug(gdbserver_state.g_cpu, saved_auxv + offset,
+ gdbserver_state.mem_buf->data, len, false)) {
+ gdb_put_packet("E14");
+ return;
+ }
+
+ gdb_memtox(gdbserver_state.str_buf,
+ (const char *)gdbserver_state.mem_buf->data, len);
+ gdb_put_packet_binary(gdbserver_state.str_buf->str,
+ gdbserver_state.str_buf->len, true);
+}
+#endif
diff --git a/gdbstub/user.c b/gdbstub/user.c
index a5f370bcf9..1c9e070e57 100644
--- a/gdbstub/user.c
+++ b/gdbstub/user.c
@@ -10,11 +10,349 @@
*/
#include "qemu/osdep.h"
+#include "qemu/cutils.h"
+#include "qemu/sockets.h"
#include "exec/hwaddr.h"
+#include "exec/tb-flush.h"
#include "exec/gdbstub.h"
+#include "gdbstub/user.h"
#include "hw/core/cpu.h"
+#include "trace.h"
#include "internals.h"
+/* User-mode specific state */
+typedef struct {
+ int fd;
+ char *socket_path;
+ int running_state;
+} GDBUserState;
+
+static GDBUserState gdbserver_user_state;
+
+int gdb_get_char(void)
+{
+ uint8_t ch;
+ int ret;
+
+ for(;;) {
+ ret = recv(gdbserver_user_state.fd, &ch, 1, 0);
+ if (ret < 0) {
+ if (errno == ECONNRESET) {
+ gdbserver_user_state.fd = -1;
+ }
+ if (errno != EINTR) {
+ return -1;
+ }
+ } else if (ret == 0) {
+ close(gdbserver_user_state.fd);
+ gdbserver_user_state.fd = -1;
+ return -1;
+ } else {
+ break;
+ }
+ }
+ return ch;
+}
+
+void gdb_put_buffer(const uint8_t *buf, int len)
+{
+ int ret;
+
+ while (len > 0) {
+ ret = send(gdbserver_user_state.fd, buf, len, 0);
+ if (ret < 0) {
+ if (errno != EINTR)
+ return;
+ } else {
+ buf += ret;
+ len -= ret;
+ }
+ }
+}
+
+/* Tell the remote gdb that the process has exited. */
+void gdb_exit(int code)
+{
+ char buf[4];
+
+ if (!gdbserver_state.init) {
+ return;
+ }
+ if (gdbserver_user_state.socket_path) {
+ unlink(gdbserver_user_state.socket_path);
+ }
+ if (gdbserver_user_state.fd < 0) {
+ return;
+ }
+
+ trace_gdbstub_op_exiting((uint8_t)code);
+
+ snprintf(buf, sizeof(buf), "W%02x", (uint8_t)code);
+ gdb_put_packet(buf);
+}
+
+int gdb_handlesig(CPUState *cpu, int sig)
+{
+ char buf[256];
+ int n;
+
+ if (!gdbserver_state.init || gdbserver_user_state.fd < 0) {
+ return sig;
+ }
+
+ /* disable single step if it was enabled */
+ cpu_single_step(cpu, 0);
+ tb_flush(cpu);
+
+ if (sig != 0) {
+ gdb_set_stop_cpu(cpu);
+ g_string_printf(gdbserver_state.str_buf,
+ "T%02xthread:", gdb_target_signal_to_gdb(sig));
+ gdb_append_thread_id(cpu, gdbserver_state.str_buf);
+ g_string_append_c(gdbserver_state.str_buf, ';');
+ gdb_put_strbuf();
+ }
+ /* gdb_put_packet() might have detected that the peer terminated the
+ connection. */
+ if (gdbserver_user_state.fd < 0) {
+ return sig;
+ }
+
+ sig = 0;
+ gdbserver_state.state = RS_IDLE;
+ gdbserver_user_state.running_state = 0;
+ while (gdbserver_user_state.running_state == 0) {
+ n = read(gdbserver_user_state.fd, buf, 256);
+ if (n > 0) {
+ int i;
+
+ for (i = 0; i < n; i++) {
+ gdb_read_byte(buf[i]);
+ }
+ } else {
+ /* XXX: Connection closed. Should probably wait for another
+ connection before continuing. */
+ if (n == 0) {
+ close(gdbserver_user_state.fd);
+ }
+ gdbserver_user_state.fd = -1;
+ return sig;
+ }
+ }
+ sig = gdbserver_state.signal;
+ gdbserver_state.signal = 0;
+ return sig;
+}
+
+/* Tell the remote gdb that the process has exited due to SIG. */
+void gdb_signalled(CPUArchState *env, int sig)
+{
+ char buf[4];
+
+ if (!gdbserver_state.init || gdbserver_user_state.fd < 0) {
+ return;
+ }
+
+ snprintf(buf, sizeof(buf), "X%02x", gdb_target_signal_to_gdb(sig));
+ gdb_put_packet(buf);
+}
+
+static void gdb_accept_init(int fd)
+{
+ gdb_init_gdbserver_state();
+ gdb_create_default_process(&gdbserver_state);
+ gdbserver_state.processes[0].attached = true;
+ gdbserver_state.c_cpu = gdb_first_attached_cpu();
+ gdbserver_state.g_cpu = gdbserver_state.c_cpu;
+ gdbserver_user_state.fd = fd;
+ gdb_has_xml = false;
+}
+
+static bool gdb_accept_socket(int gdb_fd)
+{
+ int fd;
+
+ for(;;) {
+ fd = accept(gdb_fd, NULL, NULL);
+ if (fd < 0 && errno != EINTR) {
+ perror("accept socket");
+ return false;
+ } else if (fd >= 0) {
+ qemu_set_cloexec(fd);
+ break;
+ }
+ }
+
+ gdb_accept_init(fd);
+ return true;
+}
+
+static int gdbserver_open_socket(const char *path)
+{
+ struct sockaddr_un sockaddr = {};
+ int fd, ret;
+
+ fd = socket(AF_UNIX, SOCK_STREAM, 0);
+ if (fd < 0) {
+ perror("create socket");
+ return -1;
+ }
+
+ sockaddr.sun_family = AF_UNIX;
+ pstrcpy(sockaddr.sun_path, sizeof(sockaddr.sun_path) - 1, path);
+ ret = bind(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr));
+ if (ret < 0) {
+ perror("bind socket");
+ close(fd);
+ return -1;
+ }
+ ret = listen(fd, 1);
+ if (ret < 0) {
+ perror("listen socket");
+ close(fd);
+ return -1;
+ }
+
+ return fd;
+}
+
+static bool gdb_accept_tcp(int gdb_fd)
+{
+ struct sockaddr_in sockaddr = {};
+ socklen_t len;
+ int fd;
+
+ for(;;) {
+ len = sizeof(sockaddr);
+ fd = accept(gdb_fd, (struct sockaddr *)&sockaddr, &len);
+ if (fd < 0 && errno != EINTR) {
+ perror("accept");
+ return false;
+ } else if (fd >= 0) {
+ qemu_set_cloexec(fd);
+ break;
+ }
+ }
+
+ /* set short latency */
+ if (socket_set_nodelay(fd)) {
+ perror("setsockopt");
+ close(fd);
+ return false;
+ }
+
+ gdb_accept_init(fd);
+ return true;
+}
+
+static int gdbserver_open_port(int port)
+{
+ struct sockaddr_in sockaddr;
+ int fd, ret;
+
+ fd = socket(PF_INET, SOCK_STREAM, 0);
+ if (fd < 0) {
+ perror("socket");
+ return -1;
+ }
+ qemu_set_cloexec(fd);
+
+ socket_set_fast_reuse(fd);
+
+ sockaddr.sin_family = AF_INET;
+ sockaddr.sin_port = htons(port);
+ sockaddr.sin_addr.s_addr = 0;
+ ret = bind(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr));
+ if (ret < 0) {
+ perror("bind");
+ close(fd);
+ return -1;
+ }
+ ret = listen(fd, 1);
+ if (ret < 0) {
+ perror("listen");
+ close(fd);
+ return -1;
+ }
+
+ return fd;
+}
+
+int gdbserver_start(const char *port_or_path)
+{
+ int port = g_ascii_strtoull(port_or_path, NULL, 10);
+ int gdb_fd;
+
+ if (port > 0) {
+ gdb_fd = gdbserver_open_port(port);
+ } else {
+ gdb_fd = gdbserver_open_socket(port_or_path);
+ }
+
+ if (gdb_fd < 0) {
+ return -1;
+ }
+
+ if (port > 0 && gdb_accept_tcp(gdb_fd)) {
+ return 0;
+ } else if (gdb_accept_socket(gdb_fd)) {
+ gdbserver_user_state.socket_path = g_strdup(port_or_path);
+ return 0;
+ }
+
+ /* gone wrong */
+ close(gdb_fd);
+ return -1;
+}
+
+/* Disable gdb stub for child processes. */
+void gdbserver_fork(CPUState *cpu)
+{
+ if (!gdbserver_state.init || gdbserver_user_state.fd < 0) {
+ return;
+ }
+ close(gdbserver_user_state.fd);
+ gdbserver_user_state.fd = -1;
+ cpu_breakpoint_remove_all(cpu, BP_GDB);
+ /* no cpu_watchpoint_remove_all for user-mode */
+}
+
+/*
+ * Execution state helpers
+ */
+
+void gdb_continue(void)
+{
+ gdbserver_user_state.running_state = 1;
+ trace_gdbstub_op_continue();
+}
+
+/*
+ * Resume execution, for user-mode emulation it's equivalent to
+ * gdb_continue.
+ */
+int gdb_continue_partial(char *newstates)
+{
+ CPUState *cpu;
+ int res = 0;
+ /*
+ * This is not exactly accurate, but it's an improvement compared to the
+ * previous situation, where only one CPU would be single-stepped.
+ */
+ CPU_FOREACH(cpu) {
+ if (newstates[cpu->cpu_index] == 's') {
+ trace_gdbstub_op_stepping(cpu->cpu_index);
+ cpu_single_step(cpu, gdbserver_state.sstep_flags);
+ }
+ }
+ gdbserver_user_state.running_state = 1;
+ return res;
+}
+
+/*
+ * Break/Watch point helpers
+ */
+
bool gdb_supports_guest_debug(void)
{
/* user-mode == TCG == supported */
diff --git a/linux-user/main.c b/linux-user/main.c
index 4290651c3c..7771a034ac 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -40,6 +40,7 @@
#include "qemu/plugin.h"
#include "exec/exec-all.h"
#include "exec/gdbstub.h"
+#include "gdbstub/user.h"
#include "tcg/tcg.h"
#include "qemu/timer.h"
#include "qemu/envlist.h"
diff --git a/linux-user/signal.c b/linux-user/signal.c
index 098f3a787d..748a98f3e5 100644
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -18,7 +18,7 @@
*/
#include "qemu/osdep.h"
#include "qemu/bitops.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/user.h"
#include "hw/core/tcg-cpu-ops.h"
#include <sys/ucontext.h>
diff --git a/gdbstub/meson.build b/gdbstub/meson.build
index fc895a2c39..827f062af6 100644
--- a/gdbstub/meson.build
+++ b/gdbstub/meson.build
@@ -7,3 +7,6 @@
specific_ss.add(files('gdbstub.c'))
softmmu_ss.add(files('softmmu.c'))
user_ss.add(files('user.c'))
+
+# and BSD?
+specific_ss.add(when: 'CONFIG_LINUX_USER', if_true: files('user-target.c'))
--
2.39.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v3 11/24] gdbstub: rationalise signal mapping in softmmu
2023-02-21 22:52 [PATCH v3 00/24] gdbstub: re-organise to for better compilation behaviour Alex Bennée
` (9 preceding siblings ...)
2023-02-21 22:52 ` [PATCH v3 10/24] gdbstub: move chunks of user code into own files Alex Bennée
@ 2023-02-21 22:52 ` Alex Bennée
2023-02-22 0:32 ` Richard Henderson
2023-02-21 22:52 ` [PATCH v3 12/24] gdbstub: abstract target specific details from gdb_put_packet_binary Alex Bennée
` (12 subsequent siblings)
23 siblings, 1 reply; 32+ messages in thread
From: Alex Bennée @ 2023-02-21 22:52 UTC (permalink / raw)
To: qemu-devel
Cc: Thomas Huth, qemu-arm, qemu-riscv, qemu-s390x, Yoshinori Sato,
nicolas.eder, Stafford Horne, Daniel Henrique Barboza,
Mahmoud Mandour, Taylor Simpson, mads, Marek Vasut,
Artyom Tarasenko, Alistair Francis, qemu-ppc, Yanan Wang,
Sunil Muthuswamy, Cédric Le Goater, Eduardo Habkost,
Bin Meng, Bastian Koppelmann, Palmer Dabbelt, Marcel Apfelbaum,
Laurent Vivier, Philippe Mathieu-Daudé, Michael Rolnik,
Aleksandar Rikalo, Paolo Bonzini, Alex Bennée,
Aurelien Jarno, Xiaojuan Yang, Richard Henderson, Peter Maydell,
Alexandre Iooss, Chris Wulff, Jiaxun Yang, David Gibson,
Edgar E. Iglesias, Greg Kurz, David Hildenbrand, Song Gao,
Ilya Leoshkevich, Max Filippov, Mark Cave-Ayland
We don't really need a table for mapping two symbols.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Suggested-by: Richard Henderson <richard.henderson@linaro.org>
---
gdbstub/softmmu.c | 19 +++++++------------
1 file changed, 7 insertions(+), 12 deletions(-)
diff --git a/gdbstub/softmmu.c b/gdbstub/softmmu.c
index 864ecee38f..79674b8bea 100644
--- a/gdbstub/softmmu.c
+++ b/gdbstub/softmmu.c
@@ -499,21 +499,16 @@ enum {
TARGET_SIGTRAP = 5
};
-static int gdb_signal_table[] = {
- -1,
- -1,
- TARGET_SIGINT,
- -1,
- -1,
- TARGET_SIGTRAP
-};
-
int gdb_signal_to_target (int sig)
{
- if (sig < ARRAY_SIZE (gdb_signal_table))
- return gdb_signal_table[sig];
- else
+ switch (sig) {
+ case 2:
+ return TARGET_SIGINT;
+ case 5:
+ return TARGET_SIGTRAP;
+ default:
return -1;
+ }
}
/*
--
2.39.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v3 12/24] gdbstub: abstract target specific details from gdb_put_packet_binary
2023-02-21 22:52 [PATCH v3 00/24] gdbstub: re-organise to for better compilation behaviour Alex Bennée
` (10 preceding siblings ...)
2023-02-21 22:52 ` [PATCH v3 11/24] gdbstub: rationalise signal mapping in softmmu Alex Bennée
@ 2023-02-21 22:52 ` Alex Bennée
2023-02-21 22:52 ` [PATCH v3 13/24] gdbstub: specialise handle_query_attached Alex Bennée
` (11 subsequent siblings)
23 siblings, 0 replies; 32+ messages in thread
From: Alex Bennée @ 2023-02-21 22:52 UTC (permalink / raw)
To: qemu-devel
Cc: Thomas Huth, qemu-arm, qemu-riscv, qemu-s390x, Yoshinori Sato,
nicolas.eder, Stafford Horne, Daniel Henrique Barboza,
Mahmoud Mandour, Taylor Simpson, mads, Marek Vasut,
Artyom Tarasenko, Alistair Francis, qemu-ppc, Yanan Wang,
Sunil Muthuswamy, Cédric Le Goater, Eduardo Habkost,
Bin Meng, Bastian Koppelmann, Palmer Dabbelt, Marcel Apfelbaum,
Laurent Vivier, Philippe Mathieu-Daudé, Michael Rolnik,
Aleksandar Rikalo, Paolo Bonzini, Alex Bennée,
Aurelien Jarno, Xiaojuan Yang, Richard Henderson, Peter Maydell,
Alexandre Iooss, Chris Wulff, Jiaxun Yang, David Gibson,
Edgar E. Iglesias, Greg Kurz, David Hildenbrand, Song Gao,
Ilya Leoshkevich, Max Filippov, Mark Cave-Ayland
We unfortunately handle the checking of packet acknowledgement
differently for user and softmmu modes. Abstract the user mode stuff
behind gdb_got_immediate_ack with a stub for softmmu.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
gdbstub/internals.h | 15 +++++++++++++++
gdbstub/gdbstub.c | 10 ++--------
gdbstub/softmmu.c | 8 ++++++++
gdbstub/user.c | 19 +++++++++++++++++++
4 files changed, 44 insertions(+), 8 deletions(-)
diff --git a/gdbstub/internals.h b/gdbstub/internals.h
index a3dd629ee8..3912d0de38 100644
--- a/gdbstub/internals.h
+++ b/gdbstub/internals.h
@@ -108,6 +108,21 @@ void gdb_memtohex(GString *buf, const uint8_t *mem, int len);
void gdb_memtox(GString *buf, const char *mem, int len);
void gdb_read_byte(uint8_t ch);
+/*
+ * Packet acknowledgement - we handle this slightly differently
+ * between user and softmmu mode, mainly to deal with the differences
+ * between the flexible chardev and the direct fd approaches.
+ *
+ * We currently don't support a negotiated QStartNoAckMode
+ */
+
+/**
+ * gdb_got_immediate_ack() - check ok to continue
+ *
+ * Returns true to continue, false to re-transmit for user only, the
+ * softmmu stub always returns true.
+ */
+bool gdb_got_immediate_ack(void);
/* utility helpers */
CPUState *gdb_first_attached_cpu(void);
void gdb_append_thread_id(CPUState *cpu, GString *buf);
diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c
index 4bf99783a6..76c24b7cb6 100644
--- a/gdbstub/gdbstub.c
+++ b/gdbstub/gdbstub.c
@@ -239,15 +239,9 @@ int gdb_put_packet_binary(const char *buf, int len, bool dump)
gdb_put_buffer(gdbserver_state.last_packet->data,
gdbserver_state.last_packet->len);
-#ifdef CONFIG_USER_ONLY
- i = gdb_get_char();
- if (i < 0)
- return -1;
- if (i == '+')
+ if (gdb_got_immediate_ack()) {
break;
-#else
- break;
-#endif
+ }
}
return 0;
}
diff --git a/gdbstub/softmmu.c b/gdbstub/softmmu.c
index 79674b8bea..0232e62ea4 100644
--- a/gdbstub/softmmu.c
+++ b/gdbstub/softmmu.c
@@ -55,6 +55,14 @@ int gdb_get_cpu_index(CPUState *cpu)
return cpu->cpu_index + 1;
}
+/*
+ * We check the status of the last message in the chardev receive code
+ */
+bool gdb_got_immediate_ack(void)
+{
+ return true;
+}
+
/*
* GDB Connection management. For system emulation we do all of this
* via our existing Chardev infrastructure which allows us to support
diff --git a/gdbstub/user.c b/gdbstub/user.c
index 1c9e070e57..33a0701cea 100644
--- a/gdbstub/user.c
+++ b/gdbstub/user.c
@@ -54,6 +54,25 @@ int gdb_get_char(void)
return ch;
}
+bool gdb_got_immediate_ack(void)
+{
+ int i;
+
+ i = gdb_get_char();
+ if (i < 0) {
+ /* no response, continue anyway */
+ return true;
+ }
+
+ if (i == '+') {
+ /* received correctly, continue */
+ return true;
+ }
+
+ /* anything else, including '-' then try again */
+ return false;
+}
+
void gdb_put_buffer(const uint8_t *buf, int len)
{
int ret;
--
2.39.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v3 13/24] gdbstub: specialise handle_query_attached
2023-02-21 22:52 [PATCH v3 00/24] gdbstub: re-organise to for better compilation behaviour Alex Bennée
` (11 preceding siblings ...)
2023-02-21 22:52 ` [PATCH v3 12/24] gdbstub: abstract target specific details from gdb_put_packet_binary Alex Bennée
@ 2023-02-21 22:52 ` Alex Bennée
2023-02-21 22:52 ` [PATCH v3 14/24] gdbstub: specialise target_memory_rw_debug Alex Bennée
` (10 subsequent siblings)
23 siblings, 0 replies; 32+ messages in thread
From: Alex Bennée @ 2023-02-21 22:52 UTC (permalink / raw)
To: qemu-devel
Cc: Thomas Huth, qemu-arm, qemu-riscv, qemu-s390x, Yoshinori Sato,
nicolas.eder, Stafford Horne, Daniel Henrique Barboza,
Mahmoud Mandour, Taylor Simpson, mads, Marek Vasut,
Artyom Tarasenko, Alistair Francis, qemu-ppc, Yanan Wang,
Sunil Muthuswamy, Cédric Le Goater, Eduardo Habkost,
Bin Meng, Bastian Koppelmann, Palmer Dabbelt, Marcel Apfelbaum,
Laurent Vivier, Philippe Mathieu-Daudé, Michael Rolnik,
Aleksandar Rikalo, Paolo Bonzini, Alex Bennée,
Aurelien Jarno, Xiaojuan Yang, Richard Henderson, Peter Maydell,
Alexandre Iooss, Chris Wulff, Jiaxun Yang, David Gibson,
Edgar E. Iglesias, Greg Kurz, David Hildenbrand, Song Gao,
Ilya Leoshkevich, Max Filippov, Mark Cave-Ayland
In both user and softmmu cases we are just replying with a constant.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
v3
- remove allusions to possible linker optimisations
---
gdbstub/internals.h | 4 +++-
gdbstub/gdbstub.c | 15 ++-------------
gdbstub/softmmu.c | 5 +++++
gdbstub/user.c | 5 +++++
4 files changed, 15 insertions(+), 14 deletions(-)
diff --git a/gdbstub/internals.h b/gdbstub/internals.h
index 3912d0de38..3875c6877e 100644
--- a/gdbstub/internals.h
+++ b/gdbstub/internals.h
@@ -152,7 +152,7 @@ int gdb_continue_partial(char *newstates);
void gdb_put_buffer(const uint8_t *buf, int len);
/*
- * Command handlers - either softmmu or user only
+ * Command handlers - either specialised or softmmu or user only
*/
void gdb_init_gdbserver_state(void);
@@ -181,6 +181,8 @@ void gdb_handle_query_rcmd(GArray *params, void *user_ctx); /* softmmu */
void gdb_handle_query_offsets(GArray *params, void *user_ctx); /* user */
void gdb_handle_query_xfer_auxv(GArray *params, void *user_ctx); /*user */
+void gdb_handle_query_attached(GArray *params, void *user_ctx); /* both */
+
/*
* Break/Watch point support - there is an implementation for softmmu
* and user mode.
diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c
index 76c24b7cb6..0d90685c72 100644
--- a/gdbstub/gdbstub.c
+++ b/gdbstub/gdbstub.c
@@ -46,12 +46,6 @@
#include "internals.h"
-#ifdef CONFIG_USER_ONLY
-#define GDB_ATTACHED "0"
-#else
-#define GDB_ATTACHED "1"
-#endif
-
#ifndef CONFIG_USER_ONLY
static int phy_memory_mode;
#endif
@@ -1672,11 +1666,6 @@ static void handle_query_xfer_features(GArray *params, void *user_ctx)
gdbserver_state.str_buf->len, true);
}
-static void handle_query_attached(GArray *params, void *user_ctx)
-{
- gdb_put_packet(GDB_ATTACHED);
-}
-
static void handle_query_qemu_supported(GArray *params, void *user_ctx)
{
g_string_printf(gdbserver_state.str_buf, "sstepbits;sstep");
@@ -1786,12 +1775,12 @@ static const GdbCmdParseEntry gdb_gen_query_table[] = {
},
#endif
{
- .handler = handle_query_attached,
+ .handler = gdb_handle_query_attached,
.cmd = "Attached:",
.cmd_startswith = 1
},
{
- .handler = handle_query_attached,
+ .handler = gdb_handle_query_attached,
.cmd = "Attached",
},
{
diff --git a/gdbstub/softmmu.c b/gdbstub/softmmu.c
index 0232e62ea4..ade0cc366c 100644
--- a/gdbstub/softmmu.c
+++ b/gdbstub/softmmu.c
@@ -439,6 +439,11 @@ void gdb_handle_query_rcmd(GArray *params, void *user_ctx)
* Execution state helpers
*/
+void gdb_handle_query_attached(GArray *params, void *user_ctx)
+{
+ gdb_put_packet("1");
+}
+
void gdb_continue(void)
{
if (!runstate_needs_reset()) {
diff --git a/gdbstub/user.c b/gdbstub/user.c
index 33a0701cea..90dfe49f27 100644
--- a/gdbstub/user.c
+++ b/gdbstub/user.c
@@ -340,6 +340,11 @@ void gdbserver_fork(CPUState *cpu)
* Execution state helpers
*/
+void gdb_handle_query_attached(GArray *params, void *user_ctx)
+{
+ gdb_put_packet("0");
+}
+
void gdb_continue(void)
{
gdbserver_user_state.running_state = 1;
--
2.39.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v3 14/24] gdbstub: specialise target_memory_rw_debug
2023-02-21 22:52 [PATCH v3 00/24] gdbstub: re-organise to for better compilation behaviour Alex Bennée
` (12 preceding siblings ...)
2023-02-21 22:52 ` [PATCH v3 13/24] gdbstub: specialise handle_query_attached Alex Bennée
@ 2023-02-21 22:52 ` Alex Bennée
2023-02-21 22:52 ` [PATCH v3 15/24] gdbstub: introduce gdb_get_max_cpus Alex Bennée
` (9 subsequent siblings)
23 siblings, 0 replies; 32+ messages in thread
From: Alex Bennée @ 2023-02-21 22:52 UTC (permalink / raw)
To: qemu-devel
Cc: Thomas Huth, qemu-arm, qemu-riscv, qemu-s390x, Yoshinori Sato,
nicolas.eder, Stafford Horne, Daniel Henrique Barboza,
Mahmoud Mandour, Taylor Simpson, mads, Marek Vasut,
Artyom Tarasenko, Alistair Francis, qemu-ppc, Yanan Wang,
Sunil Muthuswamy, Cédric Le Goater, Eduardo Habkost,
Bin Meng, Bastian Koppelmann, Palmer Dabbelt, Marcel Apfelbaum,
Laurent Vivier, Philippe Mathieu-Daudé, Michael Rolnik,
Aleksandar Rikalo, Paolo Bonzini, Alex Bennée,
Aurelien Jarno, Xiaojuan Yang, Richard Henderson, Peter Maydell,
Alexandre Iooss, Chris Wulff, Jiaxun Yang, David Gibson,
Edgar E. Iglesias, Greg Kurz, David Hildenbrand, Song Gao,
Ilya Leoshkevich, Max Filippov, Mark Cave-Ayland
The two implementations are different enough to encourage having a
specialisation and we can move some of the softmmu only stuff out of
gdbstub.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
gdbstub/internals.h | 19 ++++++++++++
gdbstub/gdbstub.c | 73 +++++++--------------------------------------
gdbstub/softmmu.c | 51 +++++++++++++++++++++++++++++++
gdbstub/user.c | 15 ++++++++++
4 files changed, 96 insertions(+), 62 deletions(-)
diff --git a/gdbstub/internals.h b/gdbstub/internals.h
index 3875c6877e..9de995ce3a 100644
--- a/gdbstub/internals.h
+++ b/gdbstub/internals.h
@@ -183,6 +183,10 @@ void gdb_handle_query_xfer_auxv(GArray *params, void *user_ctx); /*user */
void gdb_handle_query_attached(GArray *params, void *user_ctx); /* both */
+/* softmmu only */
+void gdb_handle_query_qemu_phy_mem_mode(GArray *params, void *user_ctx);
+void gdb_handle_set_qemu_phy_mem_mode(GArray *params, void *user_ctx);
+
/*
* Break/Watch point support - there is an implementation for softmmu
* and user mode.
@@ -192,4 +196,19 @@ int gdb_breakpoint_insert(CPUState *cs, int type, hwaddr addr, hwaddr len);
int gdb_breakpoint_remove(CPUState *cs, int type, hwaddr addr, hwaddr len);
void gdb_breakpoint_remove_all(CPUState *cs);
+/**
+ * gdb_target_memory_rw_debug() - handle debug access to memory
+ * @cs: CPUState
+ * @addr: nominal address, could be an entire physical address
+ * @buf: data
+ * @len: length of access
+ * @is_write: is it a write operation
+ *
+ * This function is specialised depending on the mode we are running
+ * in. For softmmu guests we can switch the interpretation of the
+ * address to a physical address.
+ */
+int gdb_target_memory_rw_debug(CPUState *cs, hwaddr addr,
+ uint8_t *buf, int len, bool is_write);
+
#endif /* GDBSTUB_INTERNALS_H */
diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c
index 0d90685c72..91021859a1 100644
--- a/gdbstub/gdbstub.c
+++ b/gdbstub/gdbstub.c
@@ -46,33 +46,6 @@
#include "internals.h"
-#ifndef CONFIG_USER_ONLY
-static int phy_memory_mode;
-#endif
-
-static inline int target_memory_rw_debug(CPUState *cpu, target_ulong addr,
- uint8_t *buf, int len, bool is_write)
-{
- CPUClass *cc;
-
-#ifndef CONFIG_USER_ONLY
- if (phy_memory_mode) {
- if (is_write) {
- cpu_physical_memory_write(addr, buf, len);
- } else {
- cpu_physical_memory_read(addr, buf, len);
- }
- return 0;
- }
-#endif
-
- cc = CPU_GET_CLASS(cpu);
- if (cc->memory_rw_debug) {
- return cc->memory_rw_debug(cpu, addr, buf, len, is_write);
- }
- return cpu_memory_rw_debug(cpu, addr, buf, len, is_write);
-}
-
typedef struct GDBRegisterState {
int base_reg;
int num_regs;
@@ -1194,11 +1167,11 @@ static void handle_write_mem(GArray *params, void *user_ctx)
}
gdb_hextomem(gdbserver_state.mem_buf, get_param(params, 2)->data,
- get_param(params, 1)->val_ull);
- if (target_memory_rw_debug(gdbserver_state.g_cpu,
- get_param(params, 0)->val_ull,
- gdbserver_state.mem_buf->data,
- gdbserver_state.mem_buf->len, true)) {
+ get_param(params, 1)->val_ull);
+ if (gdb_target_memory_rw_debug(gdbserver_state.g_cpu,
+ get_param(params, 0)->val_ull,
+ gdbserver_state.mem_buf->data,
+ gdbserver_state.mem_buf->len, true)) {
gdb_put_packet("E14");
return;
}
@@ -1222,10 +1195,10 @@ static void handle_read_mem(GArray *params, void *user_ctx)
g_byte_array_set_size(gdbserver_state.mem_buf,
get_param(params, 1)->val_ull);
- if (target_memory_rw_debug(gdbserver_state.g_cpu,
- get_param(params, 0)->val_ull,
- gdbserver_state.mem_buf->data,
- gdbserver_state.mem_buf->len, false)) {
+ if (gdb_target_memory_rw_debug(gdbserver_state.g_cpu,
+ get_param(params, 0)->val_ull,
+ gdbserver_state.mem_buf->data,
+ gdbserver_state.mem_buf->len, false)) {
gdb_put_packet("E14");
return;
}
@@ -1675,30 +1648,6 @@ static void handle_query_qemu_supported(GArray *params, void *user_ctx)
gdb_put_strbuf();
}
-#ifndef CONFIG_USER_ONLY
-static void handle_query_qemu_phy_mem_mode(GArray *params,
- void *user_ctx)
-{
- g_string_printf(gdbserver_state.str_buf, "%d", phy_memory_mode);
- gdb_put_strbuf();
-}
-
-static void handle_set_qemu_phy_mem_mode(GArray *params, void *user_ctx)
-{
- if (!params->len) {
- gdb_put_packet("E22");
- return;
- }
-
- if (!get_param(params, 0)->val_ul) {
- phy_memory_mode = 0;
- } else {
- phy_memory_mode = 1;
- }
- gdb_put_packet("OK");
-}
-#endif
-
static const GdbCmdParseEntry gdb_gen_query_set_common_table[] = {
/* Order is important if has same prefix */
{
@@ -1789,7 +1738,7 @@ static const GdbCmdParseEntry gdb_gen_query_table[] = {
},
#ifndef CONFIG_USER_ONLY
{
- .handler = handle_query_qemu_phy_mem_mode,
+ .handler = gdb_handle_query_qemu_phy_mem_mode,
.cmd = "qemu.PhyMemMode",
},
#endif
@@ -1805,7 +1754,7 @@ static const GdbCmdParseEntry gdb_gen_set_table[] = {
},
#ifndef CONFIG_USER_ONLY
{
- .handler = handle_set_qemu_phy_mem_mode,
+ .handler = gdb_handle_set_qemu_phy_mem_mode,
.cmd = "qemu.PhyMemMode:",
.cmd_startswith = 1,
.schema = "l0"
diff --git a/gdbstub/softmmu.c b/gdbstub/softmmu.c
index ade0cc366c..d9b9ba0a32 100644
--- a/gdbstub/softmmu.c
+++ b/gdbstub/softmmu.c
@@ -406,9 +406,60 @@ void gdb_exit(int code)
qemu_chr_fe_deinit(&gdbserver_system_state.chr, true);
}
+/*
+ * Memory access
+ */
+static int phy_memory_mode;
+
+int gdb_target_memory_rw_debug(CPUState *cpu, hwaddr addr,
+ uint8_t *buf, int len, bool is_write)
+{
+ CPUClass *cc;
+
+ if (phy_memory_mode) {
+ if (is_write) {
+ cpu_physical_memory_write(addr, buf, len);
+ } else {
+ cpu_physical_memory_read(addr, buf, len);
+ }
+ return 0;
+ }
+
+ cc = CPU_GET_CLASS(cpu);
+ if (cc->memory_rw_debug) {
+ return cc->memory_rw_debug(cpu, addr, buf, len, is_write);
+ }
+
+ return cpu_memory_rw_debug(cpu, addr, buf, len, is_write);
+}
+
+
/*
* Softmmu specific command helpers
*/
+
+void gdb_handle_query_qemu_phy_mem_mode(GArray *params,
+ void *user_ctx)
+{
+ g_string_printf(gdbserver_state.str_buf, "%d", phy_memory_mode);
+ gdb_put_strbuf();
+}
+
+void gdb_handle_set_qemu_phy_mem_mode(GArray *params, void *user_ctx)
+{
+ if (!params->len) {
+ gdb_put_packet("E22");
+ return;
+ }
+
+ if (!get_param(params, 0)->val_ul) {
+ phy_memory_mode = 0;
+ } else {
+ phy_memory_mode = 1;
+ }
+ gdb_put_packet("OK");
+}
+
void gdb_handle_query_rcmd(GArray *params, void *user_ctx)
{
const guint8 zero = 0;
diff --git a/gdbstub/user.c b/gdbstub/user.c
index 90dfe49f27..b956c0e297 100644
--- a/gdbstub/user.c
+++ b/gdbstub/user.c
@@ -373,6 +373,21 @@ int gdb_continue_partial(char *newstates)
return res;
}
+/*
+ * Memory access helpers
+ */
+int gdb_target_memory_rw_debug(CPUState *cpu, hwaddr addr,
+ uint8_t *buf, int len, bool is_write)
+{
+ CPUClass *cc;
+
+ cc = CPU_GET_CLASS(cpu);
+ if (cc->memory_rw_debug) {
+ return cc->memory_rw_debug(cpu, addr, buf, len, is_write);
+ }
+ return cpu_memory_rw_debug(cpu, addr, buf, len, is_write);
+}
+
/*
* Break/Watch point helpers
*/
--
2.39.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v3 15/24] gdbstub: introduce gdb_get_max_cpus
2023-02-21 22:52 [PATCH v3 00/24] gdbstub: re-organise to for better compilation behaviour Alex Bennée
` (13 preceding siblings ...)
2023-02-21 22:52 ` [PATCH v3 14/24] gdbstub: specialise target_memory_rw_debug Alex Bennée
@ 2023-02-21 22:52 ` Alex Bennée
2023-02-21 22:52 ` [PATCH v3 16/24] gdbstub: specialise stub_can_reverse Alex Bennée
` (8 subsequent siblings)
23 siblings, 0 replies; 32+ messages in thread
From: Alex Bennée @ 2023-02-21 22:52 UTC (permalink / raw)
To: qemu-devel
Cc: Thomas Huth, qemu-arm, qemu-riscv, qemu-s390x, Yoshinori Sato,
nicolas.eder, Stafford Horne, Daniel Henrique Barboza,
Mahmoud Mandour, Taylor Simpson, mads, Marek Vasut,
Artyom Tarasenko, Alistair Francis, qemu-ppc, Yanan Wang,
Sunil Muthuswamy, Cédric Le Goater, Eduardo Habkost,
Bin Meng, Bastian Koppelmann, Palmer Dabbelt, Marcel Apfelbaum,
Laurent Vivier, Philippe Mathieu-Daudé, Michael Rolnik,
Aleksandar Rikalo, Paolo Bonzini, Alex Bennée,
Aurelien Jarno, Xiaojuan Yang, Richard Henderson, Peter Maydell,
Alexandre Iooss, Chris Wulff, Jiaxun Yang, David Gibson,
Edgar E. Iglesias, Greg Kurz, David Hildenbrand, Song Gao,
Ilya Leoshkevich, Max Filippov, Mark Cave-Ayland
This is needed for handling vcont packets as the way of calculating
max cpus vhanges between user and softmmu mode.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
v3
- rm out of date comment
---
gdbstub/internals.h | 1 +
gdbstub/gdbstub.c | 11 +----------
gdbstub/softmmu.c | 9 +++++++++
gdbstub/user.c | 17 +++++++++++++++++
4 files changed, 28 insertions(+), 10 deletions(-)
diff --git a/gdbstub/internals.h b/gdbstub/internals.h
index 9de995ce3a..90069a9415 100644
--- a/gdbstub/internals.h
+++ b/gdbstub/internals.h
@@ -127,6 +127,7 @@ bool gdb_got_immediate_ack(void);
CPUState *gdb_first_attached_cpu(void);
void gdb_append_thread_id(CPUState *cpu, GString *buf);
int gdb_get_cpu_index(CPUState *cpu);
+unsigned int gdb_get_max_cpus(void); /* both */
void gdb_create_default_process(GDBState *s);
diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c
index 91021859a1..f9950200b8 100644
--- a/gdbstub/gdbstub.c
+++ b/gdbstub/gdbstub.c
@@ -624,16 +624,7 @@ static int gdb_handle_vcont(const char *p)
GDBProcess *process;
CPUState *cpu;
GDBThreadIdKind kind;
-#ifdef CONFIG_USER_ONLY
- int max_cpus = 1; /* global variable max_cpus exists only in system mode */
-
- CPU_FOREACH(cpu) {
- max_cpus = max_cpus <= cpu->cpu_index ? cpu->cpu_index + 1 : max_cpus;
- }
-#else
- MachineState *ms = MACHINE(qdev_get_machine());
- unsigned int max_cpus = ms->smp.max_cpus;
-#endif
+ unsigned int max_cpus = gdb_get_max_cpus();
/* uninitialised CPUs stay 0 */
newstates = g_new0(char, max_cpus);
diff --git a/gdbstub/softmmu.c b/gdbstub/softmmu.c
index d9b9ba0a32..65aa2018a7 100644
--- a/gdbstub/softmmu.c
+++ b/gdbstub/softmmu.c
@@ -433,6 +433,15 @@ int gdb_target_memory_rw_debug(CPUState *cpu, hwaddr addr,
return cpu_memory_rw_debug(cpu, addr, buf, len, is_write);
}
+/*
+ * cpu helpers
+ */
+
+unsigned int gdb_get_max_cpus(void)
+{
+ MachineState *ms = MACHINE(qdev_get_machine());
+ return ms->smp.max_cpus;
+}
/*
* Softmmu specific command helpers
diff --git a/gdbstub/user.c b/gdbstub/user.c
index b956c0e297..15ff3ab08d 100644
--- a/gdbstub/user.c
+++ b/gdbstub/user.c
@@ -388,6 +388,23 @@ int gdb_target_memory_rw_debug(CPUState *cpu, hwaddr addr,
return cpu_memory_rw_debug(cpu, addr, buf, len, is_write);
}
+/*
+ * cpu helpers
+ */
+
+unsigned int gdb_get_max_cpus(void)
+{
+ CPUState *cpu;
+ unsigned int max_cpus = 1;
+
+ CPU_FOREACH(cpu) {
+ max_cpus = max_cpus <= cpu->cpu_index ? cpu->cpu_index + 1 : max_cpus;
+ }
+
+ return max_cpus;
+}
+
+
/*
* Break/Watch point helpers
*/
--
2.39.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v3 16/24] gdbstub: specialise stub_can_reverse
2023-02-21 22:52 [PATCH v3 00/24] gdbstub: re-organise to for better compilation behaviour Alex Bennée
` (14 preceding siblings ...)
2023-02-21 22:52 ` [PATCH v3 15/24] gdbstub: introduce gdb_get_max_cpus Alex Bennée
@ 2023-02-21 22:52 ` Alex Bennée
2023-02-21 22:52 ` [PATCH v3 17/24] gdbstub: fix address type of gdb_set_cpu_pc Alex Bennée
` (7 subsequent siblings)
23 siblings, 0 replies; 32+ messages in thread
From: Alex Bennée @ 2023-02-21 22:52 UTC (permalink / raw)
To: qemu-devel
Cc: Thomas Huth, qemu-arm, qemu-riscv, qemu-s390x, Yoshinori Sato,
nicolas.eder, Stafford Horne, Daniel Henrique Barboza,
Mahmoud Mandour, Taylor Simpson, mads, Marek Vasut,
Artyom Tarasenko, Alistair Francis, qemu-ppc, Yanan Wang,
Sunil Muthuswamy, Cédric Le Goater, Eduardo Habkost,
Bin Meng, Bastian Koppelmann, Palmer Dabbelt, Marcel Apfelbaum,
Laurent Vivier, Philippe Mathieu-Daudé, Michael Rolnik,
Aleksandar Rikalo, Paolo Bonzini, Alex Bennée,
Aurelien Jarno, Xiaojuan Yang, Richard Henderson, Peter Maydell,
Alexandre Iooss, Chris Wulff, Jiaxun Yang, David Gibson,
Edgar E. Iglesias, Greg Kurz, David Hildenbrand, Song Gao,
Ilya Leoshkevich, Max Filippov, Mark Cave-Ayland
Currently we only support replay for softmmu mode so it is a constant
false for user-mode.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
v3
- rename gdb_stub_can_revers -> gdb_can_reverse
---
gdbstub/internals.h | 1 +
gdbstub/gdbstub.c | 13 ++-----------
gdbstub/softmmu.c | 5 +++++
gdbstub/user.c | 5 +++++
4 files changed, 13 insertions(+), 11 deletions(-)
diff --git a/gdbstub/internals.h b/gdbstub/internals.h
index 90069a9415..5f2e24c4f3 100644
--- a/gdbstub/internals.h
+++ b/gdbstub/internals.h
@@ -128,6 +128,7 @@ CPUState *gdb_first_attached_cpu(void);
void gdb_append_thread_id(CPUState *cpu, GString *buf);
int gdb_get_cpu_index(CPUState *cpu);
unsigned int gdb_get_max_cpus(void); /* both */
+bool gdb_can_reverse(void); /* softmmu, stub for user */
void gdb_create_default_process(GDBState *s);
diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c
index f9950200b8..e107aa065c 100644
--- a/gdbstub/gdbstub.c
+++ b/gdbstub/gdbstub.c
@@ -113,15 +113,6 @@ int use_gdb_syscalls(void)
return gdb_syscall_mode == GDB_SYS_ENABLED;
}
-static bool stub_can_reverse(void)
-{
-#ifdef CONFIG_USER_ONLY
- return false;
-#else
- return replay_mode == REPLAY_MODE_PLAY;
-#endif
-}
-
/* writes 2*len+1 bytes in buf */
void gdb_memtohex(GString *buf, const uint8_t *mem, int len)
{
@@ -1307,7 +1298,7 @@ static void handle_step(GArray *params, void *user_ctx)
static void handle_backward(GArray *params, void *user_ctx)
{
- if (!stub_can_reverse()) {
+ if (!gdb_can_reverse()) {
gdb_put_packet("E22");
}
if (params->len == 1) {
@@ -1558,7 +1549,7 @@ static void handle_query_supported(GArray *params, void *user_ctx)
g_string_append(gdbserver_state.str_buf, ";qXfer:features:read+");
}
- if (stub_can_reverse()) {
+ if (gdb_can_reverse()) {
g_string_append(gdbserver_state.str_buf,
";ReverseStep+;ReverseContinue+");
}
diff --git a/gdbstub/softmmu.c b/gdbstub/softmmu.c
index 65aa2018a7..5363ff066d 100644
--- a/gdbstub/softmmu.c
+++ b/gdbstub/softmmu.c
@@ -443,6 +443,11 @@ unsigned int gdb_get_max_cpus(void)
return ms->smp.max_cpus;
}
+bool gdb_can_reverse(void)
+{
+ return replay_mode == REPLAY_MODE_PLAY;
+}
+
/*
* Softmmu specific command helpers
*/
diff --git a/gdbstub/user.c b/gdbstub/user.c
index 15ff3ab08d..a716ad05b2 100644
--- a/gdbstub/user.c
+++ b/gdbstub/user.c
@@ -404,6 +404,11 @@ unsigned int gdb_get_max_cpus(void)
return max_cpus;
}
+/* replay not supported for user-mode */
+bool gdb_can_reverse(void)
+{
+ return false;
+}
/*
* Break/Watch point helpers
--
2.39.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v3 17/24] gdbstub: fix address type of gdb_set_cpu_pc
2023-02-21 22:52 [PATCH v3 00/24] gdbstub: re-organise to for better compilation behaviour Alex Bennée
` (15 preceding siblings ...)
2023-02-21 22:52 ` [PATCH v3 16/24] gdbstub: specialise stub_can_reverse Alex Bennée
@ 2023-02-21 22:52 ` Alex Bennée
2023-02-21 22:52 ` [PATCH v3 18/24] gdbstub: don't use target_ulong while handling registers Alex Bennée
` (6 subsequent siblings)
23 siblings, 0 replies; 32+ messages in thread
From: Alex Bennée @ 2023-02-21 22:52 UTC (permalink / raw)
To: qemu-devel
Cc: Thomas Huth, qemu-arm, qemu-riscv, qemu-s390x, Yoshinori Sato,
nicolas.eder, Stafford Horne, Daniel Henrique Barboza,
Mahmoud Mandour, Taylor Simpson, mads, Marek Vasut,
Artyom Tarasenko, Alistair Francis, qemu-ppc, Yanan Wang,
Sunil Muthuswamy, Cédric Le Goater, Eduardo Habkost,
Bin Meng, Bastian Koppelmann, Palmer Dabbelt, Marcel Apfelbaum,
Laurent Vivier, Philippe Mathieu-Daudé, Michael Rolnik,
Aleksandar Rikalo, Paolo Bonzini, Alex Bennée,
Aurelien Jarno, Xiaojuan Yang, Richard Henderson, Peter Maydell,
Alexandre Iooss, Chris Wulff, Jiaxun Yang, David Gibson,
Edgar E. Iglesias, Greg Kurz, David Hildenbrand, Song Gao,
Ilya Leoshkevich, Max Filippov, Mark Cave-Ayland
The underlying call uses vaddr and the comms API uses unsigned long
long which will always fit. We don't need to deal in target_ulong
here.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
gdbstub/gdbstub.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c
index e107aa065c..4814e8fbf3 100644
--- a/gdbstub/gdbstub.c
+++ b/gdbstub/gdbstub.c
@@ -535,7 +535,7 @@ static void gdb_process_breakpoint_remove_all(GDBProcess *p)
}
-static void gdb_set_cpu_pc(target_ulong pc)
+static void gdb_set_cpu_pc(vaddr pc)
{
CPUState *cpu = gdbserver_state.c_cpu;
@@ -1289,7 +1289,7 @@ static void handle_file_io(GArray *params, void *user_ctx)
static void handle_step(GArray *params, void *user_ctx)
{
if (params->len) {
- gdb_set_cpu_pc((target_ulong)get_param(params, 0)->val_ull);
+ gdb_set_cpu_pc(get_param(params, 0)->val_ull);
}
cpu_single_step(gdbserver_state.c_cpu, gdbserver_state.sstep_flags);
--
2.39.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v3 18/24] gdbstub: don't use target_ulong while handling registers
2023-02-21 22:52 [PATCH v3 00/24] gdbstub: re-organise to for better compilation behaviour Alex Bennée
` (16 preceding siblings ...)
2023-02-21 22:52 ` [PATCH v3 17/24] gdbstub: fix address type of gdb_set_cpu_pc Alex Bennée
@ 2023-02-21 22:52 ` Alex Bennée
2023-02-22 0:51 ` Richard Henderson
2023-02-21 22:52 ` [PATCH v3 19/24] gdbstub: move register helpers into standalone include Alex Bennée
` (5 subsequent siblings)
23 siblings, 1 reply; 32+ messages in thread
From: Alex Bennée @ 2023-02-21 22:52 UTC (permalink / raw)
To: qemu-devel
Cc: Thomas Huth, qemu-arm, qemu-riscv, qemu-s390x, Yoshinori Sato,
nicolas.eder, Stafford Horne, Daniel Henrique Barboza,
Mahmoud Mandour, Taylor Simpson, mads, Marek Vasut,
Artyom Tarasenko, Alistair Francis, qemu-ppc, Yanan Wang,
Sunil Muthuswamy, Cédric Le Goater, Eduardo Habkost,
Bin Meng, Bastian Koppelmann, Palmer Dabbelt, Marcel Apfelbaum,
Laurent Vivier, Philippe Mathieu-Daudé, Michael Rolnik,
Aleksandar Rikalo, Paolo Bonzini, Alex Bennée,
Aurelien Jarno, Xiaojuan Yang, Richard Henderson, Peter Maydell,
Alexandre Iooss, Chris Wulff, Jiaxun Yang, David Gibson,
Edgar E. Iglesias, Greg Kurz, David Hildenbrand, Song Gao,
Ilya Leoshkevich, Max Filippov, Mark Cave-Ayland
This is a hangover from the original code. addr is misleading as it is
only really a register id. While len will never exceed
MAX_PACKET_LENGTH I've used size_t as that is what strlen returns.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
v3
- fix commit message
- use unsigned for regid
---
gdbstub/gdbstub.c | 17 ++++++++++-------
1 file changed, 10 insertions(+), 7 deletions(-)
diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c
index 4814e8fbf3..7ae3ff52b3 100644
--- a/gdbstub/gdbstub.c
+++ b/gdbstub/gdbstub.c
@@ -1192,7 +1192,8 @@ static void handle_read_mem(GArray *params, void *user_ctx)
static void handle_write_all_regs(GArray *params, void *user_ctx)
{
- target_ulong addr, len;
+ unsigned int reg_id;
+ size_t len;
uint8_t *registers;
int reg_size;
@@ -1204,9 +1205,10 @@ static void handle_write_all_regs(GArray *params, void *user_ctx)
len = strlen(get_param(params, 0)->data) / 2;
gdb_hextomem(gdbserver_state.mem_buf, get_param(params, 0)->data, len);
registers = gdbserver_state.mem_buf->data;
- for (addr = 0; addr < gdbserver_state.g_cpu->gdb_num_g_regs && len > 0;
- addr++) {
- reg_size = gdb_write_register(gdbserver_state.g_cpu, registers, addr);
+ for (reg_id = 0;
+ reg_id < gdbserver_state.g_cpu->gdb_num_g_regs && len > 0;
+ reg_id++) {
+ reg_size = gdb_write_register(gdbserver_state.g_cpu, registers, reg_id);
len -= reg_size;
registers += reg_size;
}
@@ -1215,15 +1217,16 @@ static void handle_write_all_regs(GArray *params, void *user_ctx)
static void handle_read_all_regs(GArray *params, void *user_ctx)
{
- target_ulong addr, len;
+ int reg_id;
+ size_t len;
cpu_synchronize_state(gdbserver_state.g_cpu);
g_byte_array_set_size(gdbserver_state.mem_buf, 0);
len = 0;
- for (addr = 0; addr < gdbserver_state.g_cpu->gdb_num_g_regs; addr++) {
+ for (reg_id = 0; reg_id < gdbserver_state.g_cpu->gdb_num_g_regs; reg_id++) {
len += gdb_read_register(gdbserver_state.g_cpu,
gdbserver_state.mem_buf,
- addr);
+ reg_id);
}
g_assert(len == gdbserver_state.mem_buf->len);
--
2.39.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* Re: [PATCH v3 18/24] gdbstub: don't use target_ulong while handling registers
2023-02-21 22:52 ` [PATCH v3 18/24] gdbstub: don't use target_ulong while handling registers Alex Bennée
@ 2023-02-22 0:51 ` Richard Henderson
0 siblings, 0 replies; 32+ messages in thread
From: Richard Henderson @ 2023-02-22 0:51 UTC (permalink / raw)
To: Alex Bennée, qemu-devel
On 2/21/23 12:52, Alex Bennée wrote:
> This is a hangover from the original code. addr is misleading as it is
> only really a register id. While len will never exceed
> MAX_PACKET_LENGTH I've used size_t as that is what strlen returns.
>
> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
> Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
>
> ---
> v3
> - fix commit message
> - use unsigned for regid
Don't use unsigned, which you did here:
> static void handle_write_all_regs(GArray *params, void *user_ctx)
> {
> - target_ulong addr, len;
> + unsigned int reg_id;
but not here
> static void handle_read_all_regs(GArray *params, void *user_ctx)
> {
> - target_ulong addr, len;
> + int reg_id;
because the comparison,
> + for (reg_id = 0; reg_id < gdbserver_state.g_cpu->gdb_num_g_regs; reg_id++) {
is against signed:
include/hw/core/cpu.h:377: int gdb_num_g_regs;
r~
^ permalink raw reply [flat|nested] 32+ messages in thread
* [PATCH v3 19/24] gdbstub: move register helpers into standalone include
2023-02-21 22:52 [PATCH v3 00/24] gdbstub: re-organise to for better compilation behaviour Alex Bennée
` (17 preceding siblings ...)
2023-02-21 22:52 ` [PATCH v3 18/24] gdbstub: don't use target_ulong while handling registers Alex Bennée
@ 2023-02-21 22:52 ` Alex Bennée
2023-02-21 22:52 ` [PATCH v3 20/24] gdbstub: move syscall handling to new file Alex Bennée
` (4 subsequent siblings)
23 siblings, 0 replies; 32+ messages in thread
From: Alex Bennée @ 2023-02-21 22:52 UTC (permalink / raw)
To: qemu-devel
Cc: Thomas Huth, qemu-arm, qemu-riscv, qemu-s390x, Yoshinori Sato,
nicolas.eder, Stafford Horne, Daniel Henrique Barboza,
Mahmoud Mandour, Taylor Simpson, mads, Marek Vasut,
Artyom Tarasenko, Alistair Francis, qemu-ppc, Yanan Wang,
Sunil Muthuswamy, Cédric Le Goater, Eduardo Habkost,
Bin Meng, Bastian Koppelmann, Palmer Dabbelt, Marcel Apfelbaum,
Laurent Vivier, Philippe Mathieu-Daudé, Michael Rolnik,
Aleksandar Rikalo, Paolo Bonzini, Alex Bennée,
Aurelien Jarno, Xiaojuan Yang, Richard Henderson, Peter Maydell,
Alexandre Iooss, Chris Wulff, Jiaxun Yang, David Gibson,
Edgar E. Iglesias, Greg Kurz, David Hildenbrand, Song Gao,
Ilya Leoshkevich, Max Filippov, Mark Cave-Ayland
These inline helpers are all used by target specific code so move them
out of the general header so we don't needlessly pollute the rest of
the API with target specific stuff.
Note we have to include cpu.h in semihosting as it was relying on a
side effect before.
Reviewed-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
v3
- update xtensa's import-core script as well
---
include/exec/gdbstub.h | 86 ---------------------
include/gdbstub/helpers.h | 103 +++++++++++++++++++++++++
semihosting/syscalls.c | 1 +
target/alpha/gdbstub.c | 2 +-
target/arm/gdbstub.c | 1 +
target/arm/gdbstub64.c | 2 +-
target/arm/helper-a64.c | 2 +-
target/arm/m_helper.c | 1 +
target/avr/gdbstub.c | 2 +-
target/cris/gdbstub.c | 2 +-
target/hexagon/gdbstub.c | 2 +-
target/hppa/gdbstub.c | 2 +-
target/i386/gdbstub.c | 2 +-
target/i386/whpx/whpx-all.c | 2 +-
target/loongarch/gdbstub.c | 1 +
target/m68k/gdbstub.c | 2 +-
target/m68k/helper.c | 1 +
target/m68k/m68k-semi.c | 1 +
target/microblaze/gdbstub.c | 2 +-
target/mips/gdbstub.c | 2 +-
target/mips/tcg/sysemu/mips-semi.c | 1 +
target/nios2/cpu.c | 2 +-
target/nios2/nios2-semi.c | 1 +
target/openrisc/gdbstub.c | 2 +-
target/openrisc/interrupt.c | 2 +-
target/openrisc/mmu.c | 2 +-
target/ppc/cpu_init.c | 2 +-
target/ppc/gdbstub.c | 1 +
target/riscv/gdbstub.c | 1 +
target/rx/gdbstub.c | 2 +-
target/s390x/gdbstub.c | 1 +
target/s390x/helper.c | 2 +-
target/sh4/gdbstub.c | 2 +-
target/sparc/gdbstub.c | 2 +-
target/tricore/gdbstub.c | 2 +-
target/xtensa/core-dc232b.c | 2 +-
target/xtensa/core-dc233c.c | 2 +-
target/xtensa/core-de212.c | 2 +-
target/xtensa/core-de233_fpu.c | 2 +-
target/xtensa/core-dsp3400.c | 2 +-
target/xtensa/core-fsf.c | 2 +-
target/xtensa/core-lx106.c | 2 +-
target/xtensa/core-sample_controller.c | 2 +-
target/xtensa/core-test_kc705_be.c | 2 +-
target/xtensa/core-test_mmuhifi_c3.c | 2 +-
target/xtensa/gdbstub.c | 2 +-
target/xtensa/helper.c | 2 +-
target/xtensa/import_core.sh | 2 +-
48 files changed, 149 insertions(+), 121 deletions(-)
create mode 100644 include/gdbstub/helpers.h
diff --git a/include/exec/gdbstub.h b/include/exec/gdbstub.h
index 8fff5450ed..bb8a3928dd 100644
--- a/include/exec/gdbstub.h
+++ b/include/exec/gdbstub.h
@@ -110,92 +110,6 @@ void gdb_register_coprocessor(CPUState *cpu,
gdb_get_reg_cb get_reg, gdb_set_reg_cb set_reg,
int num_regs, const char *xml, int g_pos);
-#ifdef NEED_CPU_H
-#include "cpu.h"
-
-/*
- * The GDB remote protocol transfers values in target byte order. As
- * the gdbstub may be batching up several register values we always
- * append to the array.
- */
-
-static inline int gdb_get_reg8(GByteArray *buf, uint8_t val)
-{
- g_byte_array_append(buf, &val, 1);
- return 1;
-}
-
-static inline int gdb_get_reg16(GByteArray *buf, uint16_t val)
-{
- uint16_t to_word = tswap16(val);
- g_byte_array_append(buf, (uint8_t *) &to_word, 2);
- return 2;
-}
-
-static inline int gdb_get_reg32(GByteArray *buf, uint32_t val)
-{
- uint32_t to_long = tswap32(val);
- g_byte_array_append(buf, (uint8_t *) &to_long, 4);
- return 4;
-}
-
-static inline int gdb_get_reg64(GByteArray *buf, uint64_t val)
-{
- uint64_t to_quad = tswap64(val);
- g_byte_array_append(buf, (uint8_t *) &to_quad, 8);
- return 8;
-}
-
-static inline int gdb_get_reg128(GByteArray *buf, uint64_t val_hi,
- uint64_t val_lo)
-{
- uint64_t to_quad;
-#if TARGET_BIG_ENDIAN
- to_quad = tswap64(val_hi);
- g_byte_array_append(buf, (uint8_t *) &to_quad, 8);
- to_quad = tswap64(val_lo);
- g_byte_array_append(buf, (uint8_t *) &to_quad, 8);
-#else
- to_quad = tswap64(val_lo);
- g_byte_array_append(buf, (uint8_t *) &to_quad, 8);
- to_quad = tswap64(val_hi);
- g_byte_array_append(buf, (uint8_t *) &to_quad, 8);
-#endif
- return 16;
-}
-
-static inline int gdb_get_zeroes(GByteArray *array, size_t len)
-{
- guint oldlen = array->len;
- g_byte_array_set_size(array, oldlen + len);
- memset(array->data + oldlen, 0, len);
-
- return len;
-}
-
-/**
- * gdb_get_reg_ptr: get pointer to start of last element
- * @len: length of element
- *
- * This is a helper function to extract the pointer to the last
- * element for additional processing. Some front-ends do additional
- * dynamic swapping of the elements based on CPU state.
- */
-static inline uint8_t * gdb_get_reg_ptr(GByteArray *buf, int len)
-{
- return buf->data + buf->len - len;
-}
-
-#if TARGET_LONG_BITS == 64
-#define gdb_get_regl(buf, val) gdb_get_reg64(buf, val)
-#define ldtul_p(addr) ldq_p(addr)
-#else
-#define gdb_get_regl(buf, val) gdb_get_reg32(buf, val)
-#define ldtul_p(addr) ldl_p(addr)
-#endif
-
-#endif /* NEED_CPU_H */
-
/**
* gdbserver_start: start the gdb server
* @port_or_device: connection spec for gdb
diff --git a/include/gdbstub/helpers.h b/include/gdbstub/helpers.h
new file mode 100644
index 0000000000..dfaef2b9dd
--- /dev/null
+++ b/include/gdbstub/helpers.h
@@ -0,0 +1,103 @@
+/*
+ * gdbstub helpers
+ *
+ * These are all used by the various frontends and have to be host
+ * aware to ensure things are store in target order.
+ *
+ * Copyright (c) 2022 Linaro Ltd
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef _GDBSTUB_HELPERS_H_
+#define _GDBSTUB_HELPERS_H_
+
+#ifdef NEED_CPU_H
+#include "cpu.h"
+
+/*
+ * The GDB remote protocol transfers values in target byte order. As
+ * the gdbstub may be batching up several register values we always
+ * append to the array.
+ */
+
+static inline int gdb_get_reg8(GByteArray *buf, uint8_t val)
+{
+ g_byte_array_append(buf, &val, 1);
+ return 1;
+}
+
+static inline int gdb_get_reg16(GByteArray *buf, uint16_t val)
+{
+ uint16_t to_word = tswap16(val);
+ g_byte_array_append(buf, (uint8_t *) &to_word, 2);
+ return 2;
+}
+
+static inline int gdb_get_reg32(GByteArray *buf, uint32_t val)
+{
+ uint32_t to_long = tswap32(val);
+ g_byte_array_append(buf, (uint8_t *) &to_long, 4);
+ return 4;
+}
+
+static inline int gdb_get_reg64(GByteArray *buf, uint64_t val)
+{
+ uint64_t to_quad = tswap64(val);
+ g_byte_array_append(buf, (uint8_t *) &to_quad, 8);
+ return 8;
+}
+
+static inline int gdb_get_reg128(GByteArray *buf, uint64_t val_hi,
+ uint64_t val_lo)
+{
+ uint64_t to_quad;
+#if TARGET_BIG_ENDIAN
+ to_quad = tswap64(val_hi);
+ g_byte_array_append(buf, (uint8_t *) &to_quad, 8);
+ to_quad = tswap64(val_lo);
+ g_byte_array_append(buf, (uint8_t *) &to_quad, 8);
+#else
+ to_quad = tswap64(val_lo);
+ g_byte_array_append(buf, (uint8_t *) &to_quad, 8);
+ to_quad = tswap64(val_hi);
+ g_byte_array_append(buf, (uint8_t *) &to_quad, 8);
+#endif
+ return 16;
+}
+
+static inline int gdb_get_zeroes(GByteArray *array, size_t len)
+{
+ guint oldlen = array->len;
+ g_byte_array_set_size(array, oldlen + len);
+ memset(array->data + oldlen, 0, len);
+
+ return len;
+}
+
+/**
+ * gdb_get_reg_ptr: get pointer to start of last element
+ * @len: length of element
+ *
+ * This is a helper function to extract the pointer to the last
+ * element for additional processing. Some front-ends do additional
+ * dynamic swapping of the elements based on CPU state.
+ */
+static inline uint8_t * gdb_get_reg_ptr(GByteArray *buf, int len)
+{
+ return buf->data + buf->len - len;
+}
+
+#if TARGET_LONG_BITS == 64
+#define gdb_get_regl(buf, val) gdb_get_reg64(buf, val)
+#define ldtul_p(addr) ldq_p(addr)
+#else
+#define gdb_get_regl(buf, val) gdb_get_reg32(buf, val)
+#define ldtul_p(addr) ldl_p(addr)
+#endif
+
+#else
+#error "gdbstub helpers should only be included by target specific code"
+#endif
+
+#endif /* _GDBSTUB_HELPERS_H_ */
diff --git a/semihosting/syscalls.c b/semihosting/syscalls.c
index e89992cf90..d69078899a 100644
--- a/semihosting/syscalls.c
+++ b/semihosting/syscalls.c
@@ -8,6 +8,7 @@
#include "qemu/osdep.h"
#include "exec/gdbstub.h"
+#include "cpu.h"
#include "semihosting/guestfd.h"
#include "semihosting/syscalls.h"
#include "semihosting/console.h"
diff --git a/target/alpha/gdbstub.c b/target/alpha/gdbstub.c
index 7db14f4431..0f8fa150f8 100644
--- a/target/alpha/gdbstub.c
+++ b/target/alpha/gdbstub.c
@@ -19,7 +19,7 @@
*/
#include "qemu/osdep.h"
#include "cpu.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
int alpha_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
{
diff --git a/target/arm/gdbstub.c b/target/arm/gdbstub.c
index 2f806512d0..05d6eb802a 100644
--- a/target/arm/gdbstub.c
+++ b/target/arm/gdbstub.c
@@ -20,6 +20,7 @@
#include "qemu/osdep.h"
#include "cpu.h"
#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#include "internals.h"
#include "cpregs.h"
diff --git a/target/arm/gdbstub64.c b/target/arm/gdbstub64.c
index 07a6746944..48d2888b6f 100644
--- a/target/arm/gdbstub64.c
+++ b/target/arm/gdbstub64.c
@@ -20,7 +20,7 @@
#include "qemu/log.h"
#include "cpu.h"
#include "internals.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
int aarch64_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
{
diff --git a/target/arm/helper-a64.c b/target/arm/helper-a64.c
index 0972a4bdd0..c3edf163be 100644
--- a/target/arm/helper-a64.c
+++ b/target/arm/helper-a64.c
@@ -20,7 +20,7 @@
#include "qemu/osdep.h"
#include "qemu/units.h"
#include "cpu.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#include "exec/helper-proto.h"
#include "qemu/host-utils.h"
#include "qemu/log.h"
diff --git a/target/arm/m_helper.c b/target/arm/m_helper.c
index f94e87e728..e05da83af5 100644
--- a/target/arm/m_helper.c
+++ b/target/arm/m_helper.c
@@ -9,6 +9,7 @@
#include "qemu/osdep.h"
#include "cpu.h"
#include "internals.h"
+#include "gdbstub/helpers.h"
#include "exec/helper-proto.h"
#include "qemu/main-loop.h"
#include "qemu/bitops.h"
diff --git a/target/avr/gdbstub.c b/target/avr/gdbstub.c
index 1c1b908c92..150344d8b9 100644
--- a/target/avr/gdbstub.c
+++ b/target/avr/gdbstub.c
@@ -19,7 +19,7 @@
*/
#include "qemu/osdep.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
int avr_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
{
diff --git a/target/cris/gdbstub.c b/target/cris/gdbstub.c
index 2418d575b1..25c0ca33a5 100644
--- a/target/cris/gdbstub.c
+++ b/target/cris/gdbstub.c
@@ -19,7 +19,7 @@
*/
#include "qemu/osdep.h"
#include "cpu.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
int crisv10_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
{
diff --git a/target/hexagon/gdbstub.c b/target/hexagon/gdbstub.c
index d152d01bfe..46083da620 100644
--- a/target/hexagon/gdbstub.c
+++ b/target/hexagon/gdbstub.c
@@ -16,7 +16,7 @@
*/
#include "qemu/osdep.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#include "cpu.h"
#include "internal.h"
diff --git a/target/hppa/gdbstub.c b/target/hppa/gdbstub.c
index 729c37b2ca..48a514384f 100644
--- a/target/hppa/gdbstub.c
+++ b/target/hppa/gdbstub.c
@@ -19,7 +19,7 @@
#include "qemu/osdep.h"
#include "cpu.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
int hppa_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
{
diff --git a/target/i386/gdbstub.c b/target/i386/gdbstub.c
index c3a2cf6f28..255faa70f6 100644
--- a/target/i386/gdbstub.c
+++ b/target/i386/gdbstub.c
@@ -19,7 +19,7 @@
*/
#include "qemu/osdep.h"
#include "cpu.h"
-#include "exec/gdbstub.h"
+#include "include/gdbstub/helpers.h"
#ifdef TARGET_X86_64
static const int gpr_map[16] = {
diff --git a/target/i386/whpx/whpx-all.c b/target/i386/whpx/whpx-all.c
index e738d83e81..430da38778 100644
--- a/target/i386/whpx/whpx-all.c
+++ b/target/i386/whpx/whpx-all.c
@@ -12,7 +12,7 @@
#include "cpu.h"
#include "exec/address-spaces.h"
#include "exec/ioport.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#include "qemu/accel.h"
#include "sysemu/whpx.h"
#include "sysemu/cpus.h"
diff --git a/target/loongarch/gdbstub.c b/target/loongarch/gdbstub.c
index a4d1e28e36..fa3e034d15 100644
--- a/target/loongarch/gdbstub.c
+++ b/target/loongarch/gdbstub.c
@@ -10,6 +10,7 @@
#include "cpu.h"
#include "internals.h"
#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
uint64_t read_fcc(CPULoongArchState *env)
{
diff --git a/target/m68k/gdbstub.c b/target/m68k/gdbstub.c
index eb2d030e14..1e5f033a12 100644
--- a/target/m68k/gdbstub.c
+++ b/target/m68k/gdbstub.c
@@ -19,7 +19,7 @@
*/
#include "qemu/osdep.h"
#include "cpu.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
int m68k_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
{
diff --git a/target/m68k/helper.c b/target/m68k/helper.c
index 4621cf2402..3b3a6ea8bd 100644
--- a/target/m68k/helper.c
+++ b/target/m68k/helper.c
@@ -23,6 +23,7 @@
#include "exec/exec-all.h"
#include "exec/gdbstub.h"
#include "exec/helper-proto.h"
+#include "gdbstub/helpers.h"
#include "fpu/softfloat.h"
#include "qemu/qemu-print.h"
diff --git a/target/m68k/m68k-semi.c b/target/m68k/m68k-semi.c
index 87b1314925..f753710d7d 100644
--- a/target/m68k/m68k-semi.c
+++ b/target/m68k/m68k-semi.c
@@ -21,6 +21,7 @@
#include "cpu.h"
#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#include "semihosting/syscalls.h"
#include "semihosting/softmmu-uaccess.h"
#include "hw/boards.h"
diff --git a/target/microblaze/gdbstub.c b/target/microblaze/gdbstub.c
index 2e6e070051..ad2e0b27cb 100644
--- a/target/microblaze/gdbstub.c
+++ b/target/microblaze/gdbstub.c
@@ -19,7 +19,7 @@
*/
#include "qemu/osdep.h"
#include "cpu.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
/*
* GDB expects SREGs in the following order:
diff --git a/target/mips/gdbstub.c b/target/mips/gdbstub.c
index f1c2a2cf6d..62d7b72407 100644
--- a/target/mips/gdbstub.c
+++ b/target/mips/gdbstub.c
@@ -20,7 +20,7 @@
#include "qemu/osdep.h"
#include "cpu.h"
#include "internal.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#include "fpu_helper.h"
int mips_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
diff --git a/target/mips/tcg/sysemu/mips-semi.c b/target/mips/tcg/sysemu/mips-semi.c
index 85f0567a7f..4e6e759057 100644
--- a/target/mips/tcg/sysemu/mips-semi.c
+++ b/target/mips/tcg/sysemu/mips-semi.c
@@ -21,6 +21,7 @@
#include "cpu.h"
#include "qemu/log.h"
#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#include "semihosting/softmmu-uaccess.h"
#include "semihosting/semihost.h"
#include "semihosting/console.h"
diff --git a/target/nios2/cpu.c b/target/nios2/cpu.c
index cff30823da..bc5cbf81c2 100644
--- a/target/nios2/cpu.c
+++ b/target/nios2/cpu.c
@@ -23,7 +23,7 @@
#include "qapi/error.h"
#include "cpu.h"
#include "exec/log.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#include "hw/qdev-properties.h"
static void nios2_cpu_set_pc(CPUState *cs, vaddr value)
diff --git a/target/nios2/nios2-semi.c b/target/nios2/nios2-semi.c
index f76e8588c5..113b3f22aa 100644
--- a/target/nios2/nios2-semi.c
+++ b/target/nios2/nios2-semi.c
@@ -24,6 +24,7 @@
#include "qemu/osdep.h"
#include "cpu.h"
#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#include "semihosting/syscalls.h"
#include "semihosting/softmmu-uaccess.h"
#include "qemu/log.h"
diff --git a/target/openrisc/gdbstub.c b/target/openrisc/gdbstub.c
index 095bf76c12..d1074a0581 100644
--- a/target/openrisc/gdbstub.c
+++ b/target/openrisc/gdbstub.c
@@ -19,7 +19,7 @@
*/
#include "qemu/osdep.h"
#include "cpu.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
int openrisc_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
{
diff --git a/target/openrisc/interrupt.c b/target/openrisc/interrupt.c
index c31c6f12c4..3887812810 100644
--- a/target/openrisc/interrupt.c
+++ b/target/openrisc/interrupt.c
@@ -21,7 +21,7 @@
#include "qemu/log.h"
#include "cpu.h"
#include "exec/exec-all.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#include "qemu/host-utils.h"
#ifndef CONFIG_USER_ONLY
#include "hw/loader.h"
diff --git a/target/openrisc/mmu.c b/target/openrisc/mmu.c
index 0b8afdbacf..603c26715e 100644
--- a/target/openrisc/mmu.c
+++ b/target/openrisc/mmu.c
@@ -22,7 +22,7 @@
#include "qemu/log.h"
#include "cpu.h"
#include "exec/exec-all.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#include "qemu/host-utils.h"
#include "hw/loader.h"
diff --git a/target/ppc/cpu_init.c b/target/ppc/cpu_init.c
index abee71d407..78c5c48b04 100644
--- a/target/ppc/cpu_init.c
+++ b/target/ppc/cpu_init.c
@@ -20,7 +20,7 @@
#include "qemu/osdep.h"
#include "disas/dis-asm.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#include "kvm_ppc.h"
#include "sysemu/cpus.h"
#include "sysemu/hw_accel.h"
diff --git a/target/ppc/gdbstub.c b/target/ppc/gdbstub.c
index 1a0b9ca82c..d2bc1d7c53 100644
--- a/target/ppc/gdbstub.c
+++ b/target/ppc/gdbstub.c
@@ -20,6 +20,7 @@
#include "qemu/osdep.h"
#include "cpu.h"
#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#include "internal.h"
static int ppc_gdb_register_len_apple(int n)
diff --git a/target/riscv/gdbstub.c b/target/riscv/gdbstub.c
index 6e7bbdbd5e..a542683901 100644
--- a/target/riscv/gdbstub.c
+++ b/target/riscv/gdbstub.c
@@ -18,6 +18,7 @@
#include "qemu/osdep.h"
#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#include "cpu.h"
struct TypeSize {
diff --git a/target/rx/gdbstub.c b/target/rx/gdbstub.c
index 7eb2059a84..d7e0e6689b 100644
--- a/target/rx/gdbstub.c
+++ b/target/rx/gdbstub.c
@@ -17,7 +17,7 @@
*/
#include "qemu/osdep.h"
#include "cpu.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
int rx_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
{
diff --git a/target/s390x/gdbstub.c b/target/s390x/gdbstub.c
index a5d69d0e0b..0cb69395b4 100644
--- a/target/s390x/gdbstub.c
+++ b/target/s390x/gdbstub.c
@@ -23,6 +23,7 @@
#include "s390x-internal.h"
#include "exec/exec-all.h"
#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#include "qemu/bitops.h"
#include "sysemu/hw_accel.h"
#include "sysemu/tcg.h"
diff --git a/target/s390x/helper.c b/target/s390x/helper.c
index 473c8e51b0..2b363aa959 100644
--- a/target/s390x/helper.c
+++ b/target/s390x/helper.c
@@ -21,7 +21,7 @@
#include "qemu/osdep.h"
#include "cpu.h"
#include "s390x-internal.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#include "qemu/timer.h"
#include "hw/s390x/ioinst.h"
#include "hw/s390x/pv.h"
diff --git a/target/sh4/gdbstub.c b/target/sh4/gdbstub.c
index 3488f68e32..d8e199fc06 100644
--- a/target/sh4/gdbstub.c
+++ b/target/sh4/gdbstub.c
@@ -19,7 +19,7 @@
*/
#include "qemu/osdep.h"
#include "cpu.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
/* Hint: Use "set architecture sh4" in GDB to see fpu registers */
/* FIXME: We should use XML for this. */
diff --git a/target/sparc/gdbstub.c b/target/sparc/gdbstub.c
index 5d1e808e8c..a1c8fdc4d5 100644
--- a/target/sparc/gdbstub.c
+++ b/target/sparc/gdbstub.c
@@ -19,7 +19,7 @@
*/
#include "qemu/osdep.h"
#include "cpu.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#ifdef TARGET_ABI32
#define gdb_get_rega(buf, val) gdb_get_reg32(buf, val)
diff --git a/target/tricore/gdbstub.c b/target/tricore/gdbstub.c
index 3a27a7e65d..e8f8e5e6ea 100644
--- a/target/tricore/gdbstub.c
+++ b/target/tricore/gdbstub.c
@@ -18,7 +18,7 @@
*/
#include "qemu/osdep.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#define LCX_REGNUM 32
diff --git a/target/xtensa/core-dc232b.c b/target/xtensa/core-dc232b.c
index c982d09c24..9aba2667e3 100644
--- a/target/xtensa/core-dc232b.c
+++ b/target/xtensa/core-dc232b.c
@@ -27,7 +27,7 @@
#include "qemu/osdep.h"
#include "cpu.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#include "qemu/host-utils.h"
#include "qemu/timer.h"
diff --git a/target/xtensa/core-dc233c.c b/target/xtensa/core-dc233c.c
index 595ab9a90f..9b0a625063 100644
--- a/target/xtensa/core-dc233c.c
+++ b/target/xtensa/core-dc233c.c
@@ -27,7 +27,7 @@
#include "qemu/osdep.h"
#include "cpu.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#include "qemu/host-utils.h"
#include "core-dc233c/core-isa.h"
diff --git a/target/xtensa/core-de212.c b/target/xtensa/core-de212.c
index 50c995ba79..b08fe22e65 100644
--- a/target/xtensa/core-de212.c
+++ b/target/xtensa/core-de212.c
@@ -27,7 +27,7 @@
#include "qemu/osdep.h"
#include "cpu.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#include "qemu/host-utils.h"
#include "core-de212/core-isa.h"
diff --git a/target/xtensa/core-de233_fpu.c b/target/xtensa/core-de233_fpu.c
index 41af8057fb..8845cdb592 100644
--- a/target/xtensa/core-de233_fpu.c
+++ b/target/xtensa/core-de233_fpu.c
@@ -27,7 +27,7 @@
#include "qemu/osdep.h"
#include "cpu.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#include "qemu/host-utils.h"
#include "core-de233_fpu/core-isa.h"
diff --git a/target/xtensa/core-dsp3400.c b/target/xtensa/core-dsp3400.c
index 81e425c568..c0f94b9e27 100644
--- a/target/xtensa/core-dsp3400.c
+++ b/target/xtensa/core-dsp3400.c
@@ -27,7 +27,7 @@
#include "qemu/osdep.h"
#include "cpu.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#include "qemu/host-utils.h"
#include "core-dsp3400/core-isa.h"
diff --git a/target/xtensa/core-fsf.c b/target/xtensa/core-fsf.c
index 3327c50b4f..310be8d61f 100644
--- a/target/xtensa/core-fsf.c
+++ b/target/xtensa/core-fsf.c
@@ -27,7 +27,7 @@
#include "qemu/osdep.h"
#include "cpu.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#include "qemu/host-utils.h"
#include "core-fsf/core-isa.h"
diff --git a/target/xtensa/core-lx106.c b/target/xtensa/core-lx106.c
index 7a771d09a6..7f71d088f3 100644
--- a/target/xtensa/core-lx106.c
+++ b/target/xtensa/core-lx106.c
@@ -27,7 +27,7 @@
#include "qemu/osdep.h"
#include "cpu.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#include "qemu/host-utils.h"
#include "core-lx106/core-isa.h"
diff --git a/target/xtensa/core-sample_controller.c b/target/xtensa/core-sample_controller.c
index fd5de5576b..8867001aac 100644
--- a/target/xtensa/core-sample_controller.c
+++ b/target/xtensa/core-sample_controller.c
@@ -27,7 +27,7 @@
#include "qemu/osdep.h"
#include "cpu.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#include "qemu/host-utils.h"
#include "core-sample_controller/core-isa.h"
diff --git a/target/xtensa/core-test_kc705_be.c b/target/xtensa/core-test_kc705_be.c
index 294c16f2f4..bd082f49aa 100644
--- a/target/xtensa/core-test_kc705_be.c
+++ b/target/xtensa/core-test_kc705_be.c
@@ -27,7 +27,7 @@
#include "qemu/osdep.h"
#include "cpu.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#include "qemu/host-utils.h"
#include "core-test_kc705_be/core-isa.h"
diff --git a/target/xtensa/core-test_mmuhifi_c3.c b/target/xtensa/core-test_mmuhifi_c3.c
index c0e5d32d1e..3090dd01ed 100644
--- a/target/xtensa/core-test_mmuhifi_c3.c
+++ b/target/xtensa/core-test_mmuhifi_c3.c
@@ -27,7 +27,7 @@
#include "qemu/osdep.h"
#include "cpu.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#include "qemu/host-utils.h"
#include "core-test_mmuhifi_c3/core-isa.h"
diff --git a/target/xtensa/gdbstub.c b/target/xtensa/gdbstub.c
index b6696063e5..4b3bfb7e59 100644
--- a/target/xtensa/gdbstub.c
+++ b/target/xtensa/gdbstub.c
@@ -19,7 +19,7 @@
*/
#include "qemu/osdep.h"
#include "cpu.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#include "qemu/log.h"
enum {
diff --git a/target/xtensa/helper.c b/target/xtensa/helper.c
index 2aa9777a8e..dbeb97a953 100644
--- a/target/xtensa/helper.c
+++ b/target/xtensa/helper.c
@@ -29,7 +29,7 @@
#include "qemu/log.h"
#include "cpu.h"
#include "exec/exec-all.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#include "exec/helper-proto.h"
#include "qemu/error-report.h"
#include "qemu/qemu-print.h"
diff --git a/target/xtensa/import_core.sh b/target/xtensa/import_core.sh
index b4c15556c2..17dfec8957 100755
--- a/target/xtensa/import_core.sh
+++ b/target/xtensa/import_core.sh
@@ -41,7 +41,7 @@ tar -xf "$OVERLAY" -O binutils/xtensa-modules.c | \
cat <<EOF > "${TARGET}.c"
#include "qemu/osdep.h"
#include "cpu.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/helpers.h"
#include "qemu/host-utils.h"
#include "core-$NAME/core-isa.h"
--
2.39.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v3 20/24] gdbstub: move syscall handling to new file
2023-02-21 22:52 [PATCH v3 00/24] gdbstub: re-organise to for better compilation behaviour Alex Bennée
` (18 preceding siblings ...)
2023-02-21 22:52 ` [PATCH v3 19/24] gdbstub: move register helpers into standalone include Alex Bennée
@ 2023-02-21 22:52 ` Alex Bennée
2023-02-21 22:52 ` [PATCH v3 21/24] gdbstub: only compile gdbstub twice for whole build Alex Bennée
` (3 subsequent siblings)
23 siblings, 0 replies; 32+ messages in thread
From: Alex Bennée @ 2023-02-21 22:52 UTC (permalink / raw)
To: qemu-devel
Cc: Thomas Huth, qemu-arm, qemu-riscv, qemu-s390x, Yoshinori Sato,
nicolas.eder, Stafford Horne, Daniel Henrique Barboza,
Mahmoud Mandour, Taylor Simpson, mads, Marek Vasut,
Artyom Tarasenko, Alistair Francis, qemu-ppc, Yanan Wang,
Sunil Muthuswamy, Cédric Le Goater, Eduardo Habkost,
Bin Meng, Bastian Koppelmann, Palmer Dabbelt, Marcel Apfelbaum,
Laurent Vivier, Philippe Mathieu-Daudé, Michael Rolnik,
Aleksandar Rikalo, Paolo Bonzini, Alex Bennée,
Aurelien Jarno, Xiaojuan Yang, Richard Henderson, Peter Maydell,
Alexandre Iooss, Chris Wulff, Jiaxun Yang, David Gibson,
Edgar E. Iglesias, Greg Kurz, David Hildenbrand, Song Gao,
Ilya Leoshkevich, Max Filippov, Mark Cave-Ayland
Our GDB syscall support is the last chunk of code that needs target
specific support so move it to a new file. We take the opportunity to
move the syscall state into its own singleton instance and add in a
few helpers for the main gdbstub to interact with the module.
I also moved the gdb_exit() declaration into syscalls.h as it feels
pretty related and most of the callers of it treat it as such.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
gdbstub/internals.h | 8 +-
include/exec/gdbstub.h | 102 -------------
include/gdbstub/syscalls.h | 124 ++++++++++++++++
gdbstub/gdbstub.c | 177 +---------------------
gdbstub/softmmu.c | 7 +-
gdbstub/syscalls.c | 227 +++++++++++++++++++++++++++++
gdbstub/user.c | 1 +
linux-user/exit.c | 2 +-
semihosting/arm-compat-semi.c | 1 +
semihosting/guestfd.c | 2 +-
semihosting/syscalls.c | 2 +-
softmmu/runstate.c | 2 +-
target/m68k/m68k-semi.c | 2 +-
target/mips/tcg/sysemu/mips-semi.c | 2 +-
target/nios2/nios2-semi.c | 2 +-
gdbstub/meson.build | 4 +
16 files changed, 377 insertions(+), 288 deletions(-)
create mode 100644 include/gdbstub/syscalls.h
create mode 100644 gdbstub/syscalls.c
diff --git a/gdbstub/internals.h b/gdbstub/internals.h
index 5f2e24c4f3..fe82facaeb 100644
--- a/gdbstub/internals.h
+++ b/gdbstub/internals.h
@@ -59,8 +59,6 @@ typedef struct GDBState {
bool multiprocess;
GDBProcess *processes;
int process_num;
- char syscall_buf[256];
- gdb_syscall_complete_cb current_syscall_cb;
GString *str_buf;
GByteArray *mem_buf;
int sstep_flags;
@@ -189,6 +187,12 @@ void gdb_handle_query_attached(GArray *params, void *user_ctx); /* both */
void gdb_handle_query_qemu_phy_mem_mode(GArray *params, void *user_ctx);
void gdb_handle_set_qemu_phy_mem_mode(GArray *params, void *user_ctx);
+/* sycall handling */
+void gdb_handle_file_io(GArray *params, void *user_ctx);
+bool gdb_handled_syscall(void);
+void gdb_disable_syscalls(void);
+void gdb_syscall_reset(void);
+
/*
* Break/Watch point support - there is an implementation for softmmu
* and user mode.
diff --git a/include/exec/gdbstub.h b/include/exec/gdbstub.h
index bb8a3928dd..7d743fe1e9 100644
--- a/include/exec/gdbstub.h
+++ b/include/exec/gdbstub.h
@@ -10,98 +10,6 @@
#define GDB_WATCHPOINT_READ 3
#define GDB_WATCHPOINT_ACCESS 4
-/* For gdb file i/o remote protocol open flags. */
-#define GDB_O_RDONLY 0
-#define GDB_O_WRONLY 1
-#define GDB_O_RDWR 2
-#define GDB_O_APPEND 8
-#define GDB_O_CREAT 0x200
-#define GDB_O_TRUNC 0x400
-#define GDB_O_EXCL 0x800
-
-/* For gdb file i/o remote protocol errno values */
-#define GDB_EPERM 1
-#define GDB_ENOENT 2
-#define GDB_EINTR 4
-#define GDB_EBADF 9
-#define GDB_EACCES 13
-#define GDB_EFAULT 14
-#define GDB_EBUSY 16
-#define GDB_EEXIST 17
-#define GDB_ENODEV 19
-#define GDB_ENOTDIR 20
-#define GDB_EISDIR 21
-#define GDB_EINVAL 22
-#define GDB_ENFILE 23
-#define GDB_EMFILE 24
-#define GDB_EFBIG 27
-#define GDB_ENOSPC 28
-#define GDB_ESPIPE 29
-#define GDB_EROFS 30
-#define GDB_ENAMETOOLONG 91
-#define GDB_EUNKNOWN 9999
-
-/* For gdb file i/o remote protocol lseek whence. */
-#define GDB_SEEK_SET 0
-#define GDB_SEEK_CUR 1
-#define GDB_SEEK_END 2
-
-/* For gdb file i/o stat/fstat. */
-typedef uint32_t gdb_mode_t;
-typedef uint32_t gdb_time_t;
-
-struct gdb_stat {
- uint32_t gdb_st_dev; /* device */
- uint32_t gdb_st_ino; /* inode */
- gdb_mode_t gdb_st_mode; /* protection */
- uint32_t gdb_st_nlink; /* number of hard links */
- uint32_t gdb_st_uid; /* user ID of owner */
- uint32_t gdb_st_gid; /* group ID of owner */
- uint32_t gdb_st_rdev; /* device type (if inode device) */
- uint64_t gdb_st_size; /* total size, in bytes */
- uint64_t gdb_st_blksize; /* blocksize for filesystem I/O */
- uint64_t gdb_st_blocks; /* number of blocks allocated */
- gdb_time_t gdb_st_atime; /* time of last access */
- gdb_time_t gdb_st_mtime; /* time of last modification */
- gdb_time_t gdb_st_ctime; /* time of last change */
-} QEMU_PACKED;
-
-struct gdb_timeval {
- gdb_time_t tv_sec; /* second */
- uint64_t tv_usec; /* microsecond */
-} QEMU_PACKED;
-
-typedef void (*gdb_syscall_complete_cb)(CPUState *cpu, uint64_t ret, int err);
-
-/**
- * gdb_do_syscall:
- * @cb: function to call when the system call has completed
- * @fmt: gdb syscall format string
- * ...: list of arguments to interpolate into @fmt
- *
- * Send a GDB syscall request. This function will return immediately;
- * the callback function will be called later when the remote system
- * call has completed.
- *
- * @fmt should be in the 'call-id,parameter,parameter...' format documented
- * for the F request packet in the GDB remote protocol. A limited set of
- * printf-style format specifiers is supported:
- * %x - target_ulong argument printed in hex
- * %lx - 64-bit argument printed in hex
- * %s - string pointer (target_ulong) and length (int) pair
- */
-void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...);
-/**
- * gdb_do_syscallv:
- * @cb: function to call when the system call has completed
- * @fmt: gdb syscall format string
- * @va: arguments to interpolate into @fmt
- *
- * As gdb_do_syscall, but taking a va_list rather than a variable
- * argument list.
- */
-void gdb_do_syscallv(gdb_syscall_complete_cb cb, const char *fmt, va_list va);
-int use_gdb_syscalls(void);
/* Get or set a register. Returns the size of the register. */
typedef int (*gdb_get_reg_cb)(CPUArchState *env, GByteArray *buf, int reg);
@@ -120,16 +28,6 @@ void gdb_register_coprocessor(CPUState *cpu,
*/
int gdbserver_start(const char *port_or_device);
-/**
- * gdb_exit: exit gdb session, reporting inferior status
- * @code: exit code reported
- *
- * This closes the session and sends a final packet to GDB reporting
- * the exit status of the program. It also cleans up any connections
- * detritus before returning.
- */
-void gdb_exit(int code);
-
void gdb_set_stop_cpu(CPUState *cpu);
/**
diff --git a/include/gdbstub/syscalls.h b/include/gdbstub/syscalls.h
new file mode 100644
index 0000000000..5851a2c706
--- /dev/null
+++ b/include/gdbstub/syscalls.h
@@ -0,0 +1,124 @@
+/*
+ * GDB Syscall support
+ *
+ * Copyright (c) 2023 Linaro Ltd
+ *
+ * SPDX-License-Identifier: LGPL-2.0+
+ */
+
+#ifndef _SYSCALLS_H_
+#define _SYSCALLS_H_
+
+/* For gdb file i/o remote protocol open flags. */
+#define GDB_O_RDONLY 0
+#define GDB_O_WRONLY 1
+#define GDB_O_RDWR 2
+#define GDB_O_APPEND 8
+#define GDB_O_CREAT 0x200
+#define GDB_O_TRUNC 0x400
+#define GDB_O_EXCL 0x800
+
+/* For gdb file i/o remote protocol errno values */
+#define GDB_EPERM 1
+#define GDB_ENOENT 2
+#define GDB_EINTR 4
+#define GDB_EBADF 9
+#define GDB_EACCES 13
+#define GDB_EFAULT 14
+#define GDB_EBUSY 16
+#define GDB_EEXIST 17
+#define GDB_ENODEV 19
+#define GDB_ENOTDIR 20
+#define GDB_EISDIR 21
+#define GDB_EINVAL 22
+#define GDB_ENFILE 23
+#define GDB_EMFILE 24
+#define GDB_EFBIG 27
+#define GDB_ENOSPC 28
+#define GDB_ESPIPE 29
+#define GDB_EROFS 30
+#define GDB_ENAMETOOLONG 91
+#define GDB_EUNKNOWN 9999
+
+/* For gdb file i/o remote protocol lseek whence. */
+#define GDB_SEEK_SET 0
+#define GDB_SEEK_CUR 1
+#define GDB_SEEK_END 2
+
+/* For gdb file i/o stat/fstat. */
+typedef uint32_t gdb_mode_t;
+typedef uint32_t gdb_time_t;
+
+struct gdb_stat {
+ uint32_t gdb_st_dev; /* device */
+ uint32_t gdb_st_ino; /* inode */
+ gdb_mode_t gdb_st_mode; /* protection */
+ uint32_t gdb_st_nlink; /* number of hard links */
+ uint32_t gdb_st_uid; /* user ID of owner */
+ uint32_t gdb_st_gid; /* group ID of owner */
+ uint32_t gdb_st_rdev; /* device type (if inode device) */
+ uint64_t gdb_st_size; /* total size, in bytes */
+ uint64_t gdb_st_blksize; /* blocksize for filesystem I/O */
+ uint64_t gdb_st_blocks; /* number of blocks allocated */
+ gdb_time_t gdb_st_atime; /* time of last access */
+ gdb_time_t gdb_st_mtime; /* time of last modification */
+ gdb_time_t gdb_st_ctime; /* time of last change */
+} QEMU_PACKED;
+
+struct gdb_timeval {
+ gdb_time_t tv_sec; /* second */
+ uint64_t tv_usec; /* microsecond */
+} QEMU_PACKED;
+
+typedef void (*gdb_syscall_complete_cb)(CPUState *cpu, uint64_t ret, int err);
+
+/**
+ * gdb_do_syscall:
+ * @cb: function to call when the system call has completed
+ * @fmt: gdb syscall format string
+ * ...: list of arguments to interpolate into @fmt
+ *
+ * Send a GDB syscall request. This function will return immediately;
+ * the callback function will be called later when the remote system
+ * call has completed.
+ *
+ * @fmt should be in the 'call-id,parameter,parameter...' format documented
+ * for the F request packet in the GDB remote protocol. A limited set of
+ * printf-style format specifiers is supported:
+ * %x - target_ulong argument printed in hex
+ * %lx - 64-bit argument printed in hex
+ * %s - string pointer (target_ulong) and length (int) pair
+ */
+void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...);
+
+/**
+ * gdb_do_syscallv:
+ * @cb: function to call when the system call has completed
+ * @fmt: gdb syscall format string
+ * @va: arguments to interpolate into @fmt
+ *
+ * As gdb_do_syscall, but taking a va_list rather than a variable
+ * argument list.
+ */
+void gdb_do_syscallv(gdb_syscall_complete_cb cb, const char *fmt, va_list va);
+
+/**
+ * use_gdb_syscalls() - report if GDB should be used for syscalls
+ *
+ * This is mostly driven by the semihosting mode the user configures
+ * but assuming GDB is allowed by that we report true if GDB is
+ * connected to the stub.
+ */
+int use_gdb_syscalls(void);
+
+/**
+ * gdb_exit: exit gdb session, reporting inferior status
+ * @code: exit code reported
+ *
+ * This closes the session and sends a final packet to GDB reporting
+ * the exit status of the program. It also cleans up any connections
+ * detritus before returning.
+ */
+void gdb_exit(int code);
+
+#endif /* _SYSCALLS_H_ */
diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c
index 7ae3ff52b3..a8b321710c 100644
--- a/gdbstub/gdbstub.c
+++ b/gdbstub/gdbstub.c
@@ -29,6 +29,7 @@
#include "qemu/module.h"
#include "trace.h"
#include "exec/gdbstub.h"
+#include "gdbstub/syscalls.h"
#ifdef CONFIG_USER_ONLY
#include "gdbstub/user.h"
#else
@@ -38,7 +39,6 @@
#include "sysemu/hw_accel.h"
#include "sysemu/runstate.h"
-#include "semihosting/semihost.h"
#include "exec/exec-all.h"
#include "exec/tb-flush.h"
#include "exec/hwaddr.h"
@@ -78,41 +78,6 @@ void gdb_init_gdbserver_state(void)
bool gdb_has_xml;
-/*
- * Return true if there is a GDB currently connected to the stub
- * and attached to a CPU
- */
-static bool gdb_attached(void)
-{
- return gdbserver_state.init && gdbserver_state.c_cpu;
-}
-
-static enum {
- GDB_SYS_UNKNOWN,
- GDB_SYS_ENABLED,
- GDB_SYS_DISABLED,
-} gdb_syscall_mode;
-
-/* Decide if either remote gdb syscalls or native file IO should be used. */
-int use_gdb_syscalls(void)
-{
- SemihostingTarget target = semihosting_get_target();
- if (target == SEMIHOSTING_TARGET_NATIVE) {
- /* -semihosting-config target=native */
- return false;
- } else if (target == SEMIHOSTING_TARGET_GDB) {
- /* -semihosting-config target=gdb */
- return true;
- }
-
- /* -semihosting-config target=auto */
- /* On the first call check if gdb is connected and remember. */
- if (gdb_syscall_mode == GDB_SYS_UNKNOWN) {
- gdb_syscall_mode = gdb_attached() ? GDB_SYS_ENABLED : GDB_SYS_DISABLED;
- }
- return gdb_syscall_mode == GDB_SYS_ENABLED;
-}
-
/* writes 2*len+1 bytes in buf */
void gdb_memtohex(GString *buf, const uint8_t *mem, int len)
{
@@ -922,7 +887,7 @@ static void handle_detach(GArray *params, void *user_ctx)
if (!gdbserver_state.c_cpu) {
/* No more process attached */
- gdb_syscall_mode = GDB_SYS_DISABLED;
+ gdb_disable_syscalls();
gdb_continue();
}
gdb_put_packet("OK");
@@ -1234,60 +1199,6 @@ static void handle_read_all_regs(GArray *params, void *user_ctx)
gdb_put_strbuf();
}
-static void handle_file_io(GArray *params, void *user_ctx)
-{
- if (params->len >= 1 && gdbserver_state.current_syscall_cb) {
- uint64_t ret;
- int err;
-
- ret = get_param(params, 0)->val_ull;
- if (params->len >= 2) {
- err = get_param(params, 1)->val_ull;
- } else {
- err = 0;
- }
-
- /* Convert GDB error numbers back to host error numbers. */
-#define E(X) case GDB_E##X: err = E##X; break
- switch (err) {
- case 0:
- break;
- E(PERM);
- E(NOENT);
- E(INTR);
- E(BADF);
- E(ACCES);
- E(FAULT);
- E(BUSY);
- E(EXIST);
- E(NODEV);
- E(NOTDIR);
- E(ISDIR);
- E(INVAL);
- E(NFILE);
- E(MFILE);
- E(FBIG);
- E(NOSPC);
- E(SPIPE);
- E(ROFS);
- E(NAMETOOLONG);
- default:
- err = EINVAL;
- break;
- }
-#undef E
-
- gdbserver_state.current_syscall_cb(gdbserver_state.c_cpu, ret, err);
- gdbserver_state.current_syscall_cb = NULL;
- }
-
- if (params->len >= 3 && get_param(params, 2)->opcode == (uint8_t)'C') {
- gdb_put_packet("T02");
- return;
- }
-
- gdb_continue();
-}
static void handle_step(GArray *params, void *user_ctx)
{
@@ -1893,7 +1804,7 @@ static int gdb_handle_packet(const char *line_buf)
case 'F':
{
static const GdbCmdParseEntry file_io_cmd_desc = {
- .handler = handle_file_io,
+ .handler = gdb_handle_file_io,
.cmd = "F",
.cmd_startswith = 1,
.schema = "L,L,o0"
@@ -2061,88 +1972,6 @@ void gdb_set_stop_cpu(CPUState *cpu)
gdbserver_state.g_cpu = cpu;
}
-/* Send a gdb syscall request.
- This accepts limited printf-style format specifiers, specifically:
- %x - target_ulong argument printed in hex.
- %lx - 64-bit argument printed in hex.
- %s - string pointer (target_ulong) and length (int) pair. */
-void gdb_do_syscallv(gdb_syscall_complete_cb cb, const char *fmt, va_list va)
-{
- char *p;
- char *p_end;
- target_ulong addr;
- uint64_t i64;
-
- if (!gdb_attached()) {
- return;
- }
-
- gdbserver_state.current_syscall_cb = cb;
-#ifndef CONFIG_USER_ONLY
- vm_stop(RUN_STATE_DEBUG);
-#endif
- p = &gdbserver_state.syscall_buf[0];
- p_end = &gdbserver_state.syscall_buf[sizeof(gdbserver_state.syscall_buf)];
- *(p++) = 'F';
- while (*fmt) {
- if (*fmt == '%') {
- fmt++;
- switch (*fmt++) {
- case 'x':
- addr = va_arg(va, target_ulong);
- p += snprintf(p, p_end - p, TARGET_FMT_lx, addr);
- break;
- case 'l':
- if (*(fmt++) != 'x')
- goto bad_format;
- i64 = va_arg(va, uint64_t);
- p += snprintf(p, p_end - p, "%" PRIx64, i64);
- break;
- case 's':
- addr = va_arg(va, target_ulong);
- p += snprintf(p, p_end - p, TARGET_FMT_lx "/%x",
- addr, va_arg(va, int));
- break;
- default:
- bad_format:
- error_report("gdbstub: Bad syscall format string '%s'",
- fmt - 1);
- break;
- }
- } else {
- *(p++) = *(fmt++);
- }
- }
- *p = 0;
-#ifdef CONFIG_USER_ONLY
- gdb_put_packet(gdbserver_state.syscall_buf);
- /* Return control to gdb for it to process the syscall request.
- * Since the protocol requires that gdb hands control back to us
- * using a "here are the results" F packet, we don't need to check
- * gdb_handlesig's return value (which is the signal to deliver if
- * execution was resumed via a continue packet).
- */
- gdb_handlesig(gdbserver_state.c_cpu, 0);
-#else
- /* In this case wait to send the syscall packet until notification that
- the CPU has stopped. This must be done because if the packet is sent
- now the reply from the syscall request could be received while the CPU
- is still in the running state, which can cause packets to be dropped
- and state transition 'T' packets to be sent while the syscall is still
- being processed. */
- qemu_cpu_kick(gdbserver_state.c_cpu);
-#endif
-}
-
-void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...)
-{
- va_list va;
-
- va_start(va, fmt);
- gdb_do_syscallv(cb, fmt, va);
- va_end(va);
-}
-
void gdb_read_byte(uint8_t ch)
{
uint8_t reply;
diff --git a/gdbstub/softmmu.c b/gdbstub/softmmu.c
index 5363ff066d..b7e3829ca0 100644
--- a/gdbstub/softmmu.c
+++ b/gdbstub/softmmu.c
@@ -15,6 +15,7 @@
#include "qemu/error-report.h"
#include "qemu/cutils.h"
#include "exec/gdbstub.h"
+#include "gdbstub/syscalls.h"
#include "exec/hwaddr.h"
#include "exec/tb-flush.h"
#include "sysemu/cpus.h"
@@ -111,9 +112,9 @@ static void gdb_vm_state_change(void *opaque, bool running, RunState state)
if (running || gdbserver_state.state == RS_INACTIVE) {
return;
}
+
/* Is there a GDB syscall waiting to be sent? */
- if (gdbserver_state.current_syscall_cb) {
- gdb_put_packet(gdbserver_state.syscall_buf);
+ if (gdb_handled_syscall()) {
return;
}
@@ -377,7 +378,7 @@ int gdbserver_start(const char *device)
}
gdbserver_state.state = chr ? RS_IDLE : RS_INACTIVE;
gdbserver_system_state.mon_chr = mon_chr;
- gdbserver_state.current_syscall_cb = NULL;
+ gdb_syscall_reset();
return 0;
}
diff --git a/gdbstub/syscalls.c b/gdbstub/syscalls.c
new file mode 100644
index 0000000000..1b63a1d197
--- /dev/null
+++ b/gdbstub/syscalls.c
@@ -0,0 +1,227 @@
+/*
+ * GDB Syscall Handling
+ *
+ * GDB can execute syscalls on the guests behalf, currently used by
+ * the various semihosting extensions. As this interfaces with a guest
+ * ABI we need to build it per-guest (although in reality its a 32 or
+ * 64 bit target_ulong that is the only difference).
+ *
+ * Copyright (c) 2003-2005 Fabrice Bellard
+ * Copyright (c) 2023 Linaro Ltd
+ *
+ * SPDX-License-Identifier: LGPL-2.0+
+ */
+
+#include "qemu/osdep.h"
+#include "cpu.h"
+#include "semihosting/semihost.h"
+#include "sysemu/runstate.h"
+#include "gdbstub/user.h"
+#include "gdbstub/syscalls.h"
+#include "trace.h"
+#include "internals.h"
+
+/* Syscall specific state */
+typedef struct {
+ char syscall_buf[256];
+ gdb_syscall_complete_cb current_syscall_cb;
+} GDBSyscallState;
+
+static GDBSyscallState gdbserver_syscall_state;
+
+/*
+ * Return true if there is a GDB currently connected to the stub
+ * and attached to a CPU
+ */
+static bool gdb_attached(void)
+{
+ return gdbserver_state.init && gdbserver_state.c_cpu;
+}
+
+static enum {
+ GDB_SYS_UNKNOWN,
+ GDB_SYS_ENABLED,
+ GDB_SYS_DISABLED,
+} gdb_syscall_mode;
+
+/* Decide if either remote gdb syscalls or native file IO should be used. */
+int use_gdb_syscalls(void)
+{
+ SemihostingTarget target = semihosting_get_target();
+ if (target == SEMIHOSTING_TARGET_NATIVE) {
+ /* -semihosting-config target=native */
+ return false;
+ } else if (target == SEMIHOSTING_TARGET_GDB) {
+ /* -semihosting-config target=gdb */
+ return true;
+ }
+
+ /* -semihosting-config target=auto */
+ /* On the first call check if gdb is connected and remember. */
+ if (gdb_syscall_mode == GDB_SYS_UNKNOWN) {
+ gdb_syscall_mode = gdb_attached() ? GDB_SYS_ENABLED : GDB_SYS_DISABLED;
+ }
+ return gdb_syscall_mode == GDB_SYS_ENABLED;
+}
+
+/* called when the stub detaches */
+void gdb_disable_syscalls(void)
+{
+ gdb_syscall_mode = GDB_SYS_DISABLED;
+}
+
+void gdb_syscall_reset(void)
+{
+ gdbserver_syscall_state.current_syscall_cb = NULL;
+}
+
+bool gdb_handled_syscall(void)
+{
+ if (gdbserver_syscall_state.current_syscall_cb) {
+ gdb_put_packet(gdbserver_syscall_state.syscall_buf);
+ return true;
+ }
+
+ return false;
+}
+
+/* Send a gdb syscall request.
+ This accepts limited printf-style format specifiers, specifically:
+ %x - target_ulong argument printed in hex.
+ %lx - 64-bit argument printed in hex.
+ %s - string pointer (target_ulong) and length (int) pair. */
+void gdb_do_syscallv(gdb_syscall_complete_cb cb, const char *fmt, va_list va)
+{
+ char *p;
+ char *p_end;
+ target_ulong addr;
+ uint64_t i64;
+
+ if (!gdb_attached()) {
+ return;
+ }
+
+ gdbserver_syscall_state.current_syscall_cb = cb;
+#ifndef CONFIG_USER_ONLY
+ vm_stop(RUN_STATE_DEBUG);
+#endif
+ p = &gdbserver_syscall_state.syscall_buf[0];
+ p_end = &gdbserver_syscall_state.syscall_buf[sizeof(gdbserver_syscall_state.syscall_buf)];
+ *(p++) = 'F';
+ while (*fmt) {
+ if (*fmt == '%') {
+ fmt++;
+ switch (*fmt++) {
+ case 'x':
+ addr = va_arg(va, target_ulong);
+ p += snprintf(p, p_end - p, TARGET_FMT_lx, addr);
+ break;
+ case 'l':
+ if (*(fmt++) != 'x')
+ goto bad_format;
+ i64 = va_arg(va, uint64_t);
+ p += snprintf(p, p_end - p, "%" PRIx64, i64);
+ break;
+ case 's':
+ addr = va_arg(va, target_ulong);
+ p += snprintf(p, p_end - p, TARGET_FMT_lx "/%x",
+ addr, va_arg(va, int));
+ break;
+ default:
+ bad_format:
+ error_report("gdbstub: Bad syscall format string '%s'",
+ fmt - 1);
+ break;
+ }
+ } else {
+ *(p++) = *(fmt++);
+ }
+ }
+ *p = 0;
+#ifdef CONFIG_USER_ONLY
+ gdb_put_packet(gdbserver_syscall_state.syscall_buf);
+ /* Return control to gdb for it to process the syscall request.
+ * Since the protocol requires that gdb hands control back to us
+ * using a "here are the results" F packet, we don't need to check
+ * gdb_handlesig's return value (which is the signal to deliver if
+ * execution was resumed via a continue packet).
+ */
+ gdb_handlesig(gdbserver_state.c_cpu, 0);
+#else
+ /* In this case wait to send the syscall packet until notification that
+ the CPU has stopped. This must be done because if the packet is sent
+ now the reply from the syscall request could be received while the CPU
+ is still in the running state, which can cause packets to be dropped
+ and state transition 'T' packets to be sent while the syscall is still
+ being processed. */
+ qemu_cpu_kick(gdbserver_state.c_cpu);
+#endif
+}
+
+void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...)
+{
+ va_list va;
+
+ va_start(va, fmt);
+ gdb_do_syscallv(cb, fmt, va);
+ va_end(va);
+}
+
+/*
+ * GDB Command Handlers
+ */
+
+void gdb_handle_file_io(GArray *params, void *user_ctx)
+{
+ if (params->len >= 1 && gdbserver_syscall_state.current_syscall_cb) {
+ uint64_t ret;
+ int err;
+
+ ret = get_param(params, 0)->val_ull;
+ if (params->len >= 2) {
+ err = get_param(params, 1)->val_ull;
+ } else {
+ err = 0;
+ }
+
+ /* Convert GDB error numbers back to host error numbers. */
+#define E(X) case GDB_E##X: err = E##X; break
+ switch (err) {
+ case 0:
+ break;
+ E(PERM);
+ E(NOENT);
+ E(INTR);
+ E(BADF);
+ E(ACCES);
+ E(FAULT);
+ E(BUSY);
+ E(EXIST);
+ E(NODEV);
+ E(NOTDIR);
+ E(ISDIR);
+ E(INVAL);
+ E(NFILE);
+ E(MFILE);
+ E(FBIG);
+ E(NOSPC);
+ E(SPIPE);
+ E(ROFS);
+ E(NAMETOOLONG);
+ default:
+ err = EINVAL;
+ break;
+ }
+#undef E
+
+ gdbserver_syscall_state.current_syscall_cb(gdbserver_state.c_cpu, ret, err);
+ gdbserver_syscall_state.current_syscall_cb = NULL;
+ }
+
+ if (params->len >= 3 && get_param(params, 2)->opcode == (uint8_t)'C') {
+ gdb_put_packet("T02");
+ return;
+ }
+
+ gdb_continue();
+}
diff --git a/gdbstub/user.c b/gdbstub/user.c
index a716ad05b2..cc7eeb9afb 100644
--- a/gdbstub/user.c
+++ b/gdbstub/user.c
@@ -15,6 +15,7 @@
#include "exec/hwaddr.h"
#include "exec/tb-flush.h"
#include "exec/gdbstub.h"
+#include "gdbstub/syscalls.h"
#include "gdbstub/user.h"
#include "hw/core/cpu.h"
#include "trace.h"
diff --git a/linux-user/exit.c b/linux-user/exit.c
index 607b6da9fc..fd49d76f45 100644
--- a/linux-user/exit.c
+++ b/linux-user/exit.c
@@ -18,7 +18,7 @@
*/
#include "qemu/osdep.h"
#include "accel/tcg/perf.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/syscalls.h"
#include "qemu.h"
#include "user-internals.h"
#ifdef CONFIG_GPROF
diff --git a/semihosting/arm-compat-semi.c b/semihosting/arm-compat-semi.c
index 62d8bae97f..564fe17f75 100644
--- a/semihosting/arm-compat-semi.c
+++ b/semihosting/arm-compat-semi.c
@@ -34,6 +34,7 @@
#include "qemu/osdep.h"
#include "qemu/timer.h"
#include "exec/gdbstub.h"
+#include "gdbstub/syscalls.h"
#include "semihosting/semihost.h"
#include "semihosting/console.h"
#include "semihosting/common-semi.h"
diff --git a/semihosting/guestfd.c b/semihosting/guestfd.c
index b05c52f26f..acb86b50dd 100644
--- a/semihosting/guestfd.c
+++ b/semihosting/guestfd.c
@@ -9,7 +9,7 @@
*/
#include "qemu/osdep.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/syscalls.h"
#include "semihosting/semihost.h"
#include "semihosting/guestfd.h"
#ifdef CONFIG_USER_ONLY
diff --git a/semihosting/syscalls.c b/semihosting/syscalls.c
index d69078899a..42080ffdda 100644
--- a/semihosting/syscalls.c
+++ b/semihosting/syscalls.c
@@ -7,8 +7,8 @@
*/
#include "qemu/osdep.h"
-#include "exec/gdbstub.h"
#include "cpu.h"
+#include "gdbstub/syscalls.h"
#include "semihosting/guestfd.h"
#include "semihosting/syscalls.h"
#include "semihosting/console.h"
diff --git a/softmmu/runstate.c b/softmmu/runstate.c
index f9ad88e6a7..6ee622841d 100644
--- a/softmmu/runstate.c
+++ b/softmmu/runstate.c
@@ -30,7 +30,7 @@
#include "crypto/cipher.h"
#include "crypto/init.h"
#include "exec/cpu-common.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/syscalls.h"
#include "hw/boards.h"
#include "migration/misc.h"
#include "migration/postcopy-ram.h"
diff --git a/target/m68k/m68k-semi.c b/target/m68k/m68k-semi.c
index f753710d7d..88ad9ba814 100644
--- a/target/m68k/m68k-semi.c
+++ b/target/m68k/m68k-semi.c
@@ -20,7 +20,7 @@
#include "qemu/osdep.h"
#include "cpu.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/syscalls.h"
#include "gdbstub/helpers.h"
#include "semihosting/syscalls.h"
#include "semihosting/softmmu-uaccess.h"
diff --git a/target/mips/tcg/sysemu/mips-semi.c b/target/mips/tcg/sysemu/mips-semi.c
index 4e6e759057..f3735df7b9 100644
--- a/target/mips/tcg/sysemu/mips-semi.c
+++ b/target/mips/tcg/sysemu/mips-semi.c
@@ -20,7 +20,7 @@
#include "qemu/osdep.h"
#include "cpu.h"
#include "qemu/log.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/syscalls.h"
#include "gdbstub/helpers.h"
#include "semihosting/softmmu-uaccess.h"
#include "semihosting/semihost.h"
diff --git a/target/nios2/nios2-semi.c b/target/nios2/nios2-semi.c
index 113b3f22aa..3738774976 100644
--- a/target/nios2/nios2-semi.c
+++ b/target/nios2/nios2-semi.c
@@ -23,7 +23,7 @@
#include "qemu/osdep.h"
#include "cpu.h"
-#include "exec/gdbstub.h"
+#include "gdbstub/syscalls.h"
#include "gdbstub/helpers.h"
#include "semihosting/syscalls.h"
#include "semihosting/softmmu-uaccess.h"
diff --git a/gdbstub/meson.build b/gdbstub/meson.build
index 827f062af6..56c40c25ef 100644
--- a/gdbstub/meson.build
+++ b/gdbstub/meson.build
@@ -5,6 +5,10 @@
#
specific_ss.add(files('gdbstub.c'))
+
+# These have to built to the target ABI
+specific_ss.add(files('syscalls.c'))
+
softmmu_ss.add(files('softmmu.c'))
user_ss.add(files('user.c'))
--
2.39.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v3 21/24] gdbstub: only compile gdbstub twice for whole build
2023-02-21 22:52 [PATCH v3 00/24] gdbstub: re-organise to for better compilation behaviour Alex Bennée
` (19 preceding siblings ...)
2023-02-21 22:52 ` [PATCH v3 20/24] gdbstub: move syscall handling to new file Alex Bennée
@ 2023-02-21 22:52 ` Alex Bennée
2023-02-22 7:18 ` Richard Henderson
2023-02-21 22:52 ` [PATCH v3 22/24] testing: probe gdb for supported architectures ahead of time Alex Bennée
` (2 subsequent siblings)
23 siblings, 1 reply; 32+ messages in thread
From: Alex Bennée @ 2023-02-21 22:52 UTC (permalink / raw)
To: qemu-devel
Cc: Thomas Huth, qemu-arm, qemu-riscv, qemu-s390x, Yoshinori Sato,
nicolas.eder, Stafford Horne, Daniel Henrique Barboza,
Mahmoud Mandour, Taylor Simpson, mads, Marek Vasut,
Artyom Tarasenko, Alistair Francis, qemu-ppc, Yanan Wang,
Sunil Muthuswamy, Cédric Le Goater, Eduardo Habkost,
Bin Meng, Bastian Koppelmann, Palmer Dabbelt, Marcel Apfelbaum,
Laurent Vivier, Philippe Mathieu-Daudé, Michael Rolnik,
Aleksandar Rikalo, Paolo Bonzini, Alex Bennée,
Aurelien Jarno, Xiaojuan Yang, Richard Henderson, Peter Maydell,
Alexandre Iooss, Chris Wulff, Jiaxun Yang, David Gibson,
Edgar E. Iglesias, Greg Kurz, David Hildenbrand, Song Gao,
Ilya Leoshkevich, Max Filippov, Mark Cave-Ayland
Now we have removed any target specific bits from the core gdbstub
code we only need to build it twice. We have to jump a few meson hoops
to manually define the CONFIG_USER_ONLY symbol but it seems to work.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
v3
- also include user and softmmu bits in the library
---
gdbstub/gdbstub.c | 3 +--
gdbstub/user-target.c | 2 +-
gdbstub/meson.build | 32 ++++++++++++++++++++++++++------
3 files changed, 28 insertions(+), 9 deletions(-)
diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c
index a8b321710c..791cb79bf6 100644
--- a/gdbstub/gdbstub.c
+++ b/gdbstub/gdbstub.c
@@ -39,7 +39,6 @@
#include "sysemu/hw_accel.h"
#include "sysemu/runstate.h"
-#include "exec/exec-all.h"
#include "exec/tb-flush.h"
#include "exec/hwaddr.h"
#include "sysemu/replay.h"
@@ -1611,7 +1610,7 @@ static const GdbCmdParseEntry gdb_gen_query_table[] = {
.cmd_startswith = 1,
.schema = "s:l,l0"
},
-#if defined(CONFIG_USER_ONLY) && defined(CONFIG_LINUX_USER)
+#if defined(CONFIG_USER_ONLY) && defined(CONFIG_LINUX)
{
.handler = gdb_handle_query_xfer_auxv,
.cmd = "Xfer:auxv:read::",
diff --git a/gdbstub/user-target.c b/gdbstub/user-target.c
index e1d9650c1e..a0c10d6e12 100644
--- a/gdbstub/user-target.c
+++ b/gdbstub/user-target.c
@@ -233,7 +233,7 @@ static inline int target_memory_rw_debug(CPUState *cpu, target_ulong addr,
}
-#if defined(CONFIG_LINUX_USER)
+#if defined(CONFIG_LINUX)
void gdb_handle_query_xfer_auxv(GArray *params, void *user_ctx)
{
TaskState *ts;
diff --git a/gdbstub/meson.build b/gdbstub/meson.build
index 56c40c25ef..6abf067afc 100644
--- a/gdbstub/meson.build
+++ b/gdbstub/meson.build
@@ -4,13 +4,33 @@
# types such as hwaddr.
#
-specific_ss.add(files('gdbstub.c'))
+# We need to build the core gdb code via a library to be able to tweak
+# cflags so:
+
+gdb_user_ss = ss.source_set()
+gdb_softmmu_ss = ss.source_set()
+
+# We build two versions of gdbstub, one for each mode
+gdb_user_ss.add(files('gdbstub.c', 'user.c'))
+gdb_softmmu_ss.add(files('gdbstub.c', 'softmmu.c'))
+
+gdb_user_ss = gdb_user_ss.apply(config_host, strict: false)
+gdb_softmmu_ss = gdb_softmmu_ss.apply(config_host, strict: false)
+
+libgdb_user = static_library('gdb_user', gdb_user_ss.sources(),
+ name_suffix: 'fa',
+ c_args: '-DCONFIG_USER_ONLY')
+
+libgdb_softmmu = static_library('gdb_softmmu', gdb_softmmu_ss.sources(),
+ name_suffix: 'fa')
+
+gdb_user = declare_dependency(link_whole: libgdb_user)
+user_ss.add(gdb_user)
+gdb_softmmu = declare_dependency(link_whole: libgdb_softmmu)
+softmmu_ss.add(gdb_softmmu)
# These have to built to the target ABI
specific_ss.add(files('syscalls.c'))
-softmmu_ss.add(files('softmmu.c'))
-user_ss.add(files('user.c'))
-
-# and BSD?
-specific_ss.add(when: 'CONFIG_LINUX_USER', if_true: files('user-target.c'))
+# The user-target is specialised by the guest
+specific_ss.add(when: 'CONFIG_USER_ONLY', if_true: files('user-target.c'))
--
2.39.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH v3 22/24] testing: probe gdb for supported architectures ahead of time
2023-02-21 22:52 [PATCH v3 00/24] gdbstub: re-organise to for better compilation behaviour Alex Bennée
` (20 preceding siblings ...)
2023-02-21 22:52 ` [PATCH v3 21/24] gdbstub: only compile gdbstub twice for whole build Alex Bennée
@ 2023-02-21 22:52 ` Alex Bennée
2023-02-22 1:10 ` Richard Henderson
2023-02-21 22:52 ` [PATCH v3 23/24] include: split target_long definition from cpu-defs Alex Bennée
2023-02-21 22:52 ` [PATCH v3 24/24] gdbstub: split out softmmu/user specifics for syscall handling Alex Bennée
23 siblings, 1 reply; 32+ messages in thread
From: Alex Bennée @ 2023-02-21 22:52 UTC (permalink / raw)
To: qemu-devel
Cc: Thomas Huth, qemu-arm, qemu-riscv, qemu-s390x, Yoshinori Sato,
nicolas.eder, Stafford Horne, Daniel Henrique Barboza,
Mahmoud Mandour, Taylor Simpson, mads, Marek Vasut,
Artyom Tarasenko, Alistair Francis, qemu-ppc, Yanan Wang,
Sunil Muthuswamy, Cédric Le Goater, Eduardo Habkost,
Bin Meng, Bastian Koppelmann, Palmer Dabbelt, Marcel Apfelbaum,
Laurent Vivier, Philippe Mathieu-Daudé, Michael Rolnik,
Aleksandar Rikalo, Paolo Bonzini, Alex Bennée,
Aurelien Jarno, Xiaojuan Yang, Richard Henderson, Peter Maydell,
Alexandre Iooss, Chris Wulff, Jiaxun Yang, David Gibson,
Edgar E. Iglesias, Greg Kurz, David Hildenbrand, Song Gao,
Ilya Leoshkevich, Max Filippov, Mark Cave-Ayland
Currently when we encounter a gdb that is old or not built with
multiarch in mind we fail rather messily. Try and improve the
situation by probing ahead of time and setting
HOST_GDB_SUPPORTS_ARCH=y in the relevant tcg configs. We can then skip
and give a more meaningful message if we don't run the test.
[AJB: we still miss some arches, for example gdb uses s390 which fails
when we look for s390x. Not sure what the best way to deal with that
is? Maybe define a gdb_arch as we probe each target?]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Cc: Richard Henderson <richard.henderson@linaro.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
---
configure | 8 +++++
scripts/probe-gdb-support.sh | 36 +++++++++++++++++++
tests/tcg/aarch64/Makefile.target | 2 +-
tests/tcg/multiarch/Makefile.target | 5 +++
.../multiarch/system/Makefile.softmmu-target | 6 +++-
tests/tcg/s390x/Makefile.target | 2 +-
6 files changed, 56 insertions(+), 3 deletions(-)
create mode 100755 scripts/probe-gdb-support.sh
diff --git a/configure b/configure
index cf6db3d551..366a1d8dd2 100755
--- a/configure
+++ b/configure
@@ -226,6 +226,7 @@ stack_protector=""
safe_stack=""
use_containers="yes"
gdb_bin=$(command -v "gdb-multiarch" || command -v "gdb")
+gdb_arches=""
if test -e "$source_path/.git"
then
@@ -2344,6 +2345,7 @@ if test -n "$gdb_bin"; then
gdb_version=$($gdb_bin --version | head -n 1)
if version_ge ${gdb_version##* } 9.1; then
echo "HAVE_GDB_BIN=$gdb_bin" >> $config_host_mak
+ gdb_arches=$("$source_path/scripts/probe-gdb-support.sh" $gdb_bin)
else
gdb_bin=""
fi
@@ -2467,6 +2469,12 @@ for target in $target_list; do
write_target_makefile "build-tcg-tests-$target" >> "$config_target_mak"
echo "BUILD_STATIC=$build_static" >> "$config_target_mak"
echo "QEMU=$PWD/$qemu" >> "$config_target_mak"
+
+ # will GDB work with these binaries?
+ if test "${gdb_arches#*$arch}" != "$gdb_arches"; then
+ echo "HOST_GDB_SUPPORTS_ARCH=y" >> "$config_target_mak"
+ fi
+
echo "run-tcg-tests-$target: $qemu\$(EXESUF)" >> Makefile.prereqs
tcg_tests_targets="$tcg_tests_targets $target"
fi
diff --git a/scripts/probe-gdb-support.sh b/scripts/probe-gdb-support.sh
new file mode 100755
index 0000000000..2b09a00a5b
--- /dev/null
+++ b/scripts/probe-gdb-support.sh
@@ -0,0 +1,36 @@
+#!/bin/sh
+
+# Probe gdb for supported architectures.
+#
+# This is required to support testing of the gdbstub as its hard to
+# handle errors gracefully during the test. Instead this script when
+# passed a GDB binary will probe its architecture support and return a
+# string of supported arches, stripped of guff.
+#
+# Copyright 2023 Linaro Ltd
+#
+# Author: Alex Bennée <alex.bennee@linaro.org>
+#
+# This work is licensed under the terms of the GNU GPL, version 2 or later.
+# See the COPYING file in the top-level directory.
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+if test -z "$1"; then
+ echo "Usage: $0 /path/to/gdb"
+ exit 1
+fi
+
+# Start gdb with a set-architecture and capture the set of valid
+# options.
+
+valid_args=$($1 -ex "set architecture" -ex "quit" 2>&1 >/dev/null)
+
+# Strip off the preamble
+raw_arches=$(echo "${valid_args}" | sed "s/.*Valid arguments are \(.*\)/\1/")
+
+# Split into lines, strip everything after :foo and return final
+# "clean" list of supported arches.
+final_arches=$(echo "${raw_arches}" | tr ', ' '\n' | sed "s/:.*//" | sort | uniq)
+
+echo "$final_arches"
diff --git a/tests/tcg/aarch64/Makefile.target b/tests/tcg/aarch64/Makefile.target
index db122ab4ff..9e91a20b0d 100644
--- a/tests/tcg/aarch64/Makefile.target
+++ b/tests/tcg/aarch64/Makefile.target
@@ -81,7 +81,7 @@ sha512-vector: sha512.c
TESTS += sha512-vector
-ifneq ($(HAVE_GDB_BIN),)
+ifeq ($(HOST_GDB_SUPPORTS_ARCH),y)
GDB_SCRIPT=$(SRC_PATH)/tests/guest-debug/run-test.py
run-gdbstub-sysregs: sysregs
diff --git a/tests/tcg/multiarch/Makefile.target b/tests/tcg/multiarch/Makefile.target
index ae8b3d7268..373db69648 100644
--- a/tests/tcg/multiarch/Makefile.target
+++ b/tests/tcg/multiarch/Makefile.target
@@ -64,6 +64,7 @@ run-test-mmap-%: test-mmap
$(call run-test, test-mmap-$*, $(QEMU) -p $* $<, $< ($* byte pages))
ifneq ($(HAVE_GDB_BIN),)
+ifeq ($(HOST_GDB_SUPPORTS_ARCH),y)
GDB_SCRIPT=$(SRC_PATH)/tests/guest-debug/run-test.py
run-gdbstub-sha1: sha1
@@ -87,6 +88,10 @@ run-gdbstub-thread-breakpoint: testthread
--bin $< --test $(MULTIARCH_SRC)/gdbstub/test-thread-breakpoint.py, \
hitting a breakpoint on non-main thread)
+else
+run-gdbstub-%:
+ $(call skip-test, "gdbstub test $*", "no guest arch support")
+endif
else
run-gdbstub-%:
$(call skip-test, "gdbstub test $*", "need working gdb")
diff --git a/tests/tcg/multiarch/system/Makefile.softmmu-target b/tests/tcg/multiarch/system/Makefile.softmmu-target
index 368b64d531..5f432c95f3 100644
--- a/tests/tcg/multiarch/system/Makefile.softmmu-target
+++ b/tests/tcg/multiarch/system/Makefile.softmmu-target
@@ -15,6 +15,7 @@ MULTIARCH_TEST_SRCS=$(wildcard $(MULTIARCH_SYSTEM_SRC)/*.c)
MULTIARCH_TESTS = $(patsubst $(MULTIARCH_SYSTEM_SRC)/%.c, %, $(MULTIARCH_TEST_SRCS))
ifneq ($(HAVE_GDB_BIN),)
+ifeq ($(HOST_GDB_SUPPORTS_ARCH),y)
GDB_SCRIPT=$(SRC_PATH)/tests/guest-debug/run-test.py
run-gdbstub-memory: memory
@@ -26,7 +27,10 @@ run-gdbstub-memory: memory
"-monitor none -display none -chardev file$(COMMA)path=$<.out$(COMMA)id=output $(QEMU_OPTS)" \
--bin $< --test $(MULTIARCH_SRC)/gdbstub/memory.py, \
softmmu gdbstub support)
-
+else
+run-gdbstub-%:
+ $(call skip-test, "gdbstub test $*", "no guest arch support")
+endif
else
run-gdbstub-%:
$(call skip-test, "gdbstub test $*", "need working gdb")
diff --git a/tests/tcg/s390x/Makefile.target b/tests/tcg/s390x/Makefile.target
index 72ad309b27..b7f576f983 100644
--- a/tests/tcg/s390x/Makefile.target
+++ b/tests/tcg/s390x/Makefile.target
@@ -51,7 +51,7 @@ $(Z15_TESTS): CFLAGS+=-march=z15 -O2
TESTS+=$(Z15_TESTS)
endif
-ifneq ($(HAVE_GDB_BIN),)
+ifeq ($(HOST_GDB_SUPPORTS_ARCH),y)
GDB_SCRIPT=$(SRC_PATH)/tests/guest-debug/run-test.py
run-gdbstub-signals-s390x: signals-s390x
--
2.39.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* Re: [PATCH v3 22/24] testing: probe gdb for supported architectures ahead of time
2023-02-21 22:52 ` [PATCH v3 22/24] testing: probe gdb for supported architectures ahead of time Alex Bennée
@ 2023-02-22 1:10 ` Richard Henderson
0 siblings, 0 replies; 32+ messages in thread
From: Richard Henderson @ 2023-02-22 1:10 UTC (permalink / raw)
To: Alex Bennée, qemu-devel
On 2/21/23 12:52, Alex Bennée wrote:
> Currently when we encounter a gdb that is old or not built with
> multiarch in mind we fail rather messily. Try and improve the
> situation by probing ahead of time and setting
> HOST_GDB_SUPPORTS_ARCH=y in the relevant tcg configs. We can then skip
> and give a more meaningful message if we don't run the test.
>
> [AJB: we still miss some arches, for example gdb uses s390 which fails
> when we look for s390x. Not sure what the best way to deal with that
> is? Maybe define a gdb_arch as we probe each target?]
I think we need to have a complete gdb -> qemu mapping.
Seems like this would be fairly easy in python...
r~
^ permalink raw reply [flat|nested] 32+ messages in thread
* [PATCH v3 23/24] include: split target_long definition from cpu-defs
2023-02-21 22:52 [PATCH v3 00/24] gdbstub: re-organise to for better compilation behaviour Alex Bennée
` (21 preceding siblings ...)
2023-02-21 22:52 ` [PATCH v3 22/24] testing: probe gdb for supported architectures ahead of time Alex Bennée
@ 2023-02-21 22:52 ` Alex Bennée
2023-02-22 1:17 ` Richard Henderson
2023-02-21 22:52 ` [PATCH v3 24/24] gdbstub: split out softmmu/user specifics for syscall handling Alex Bennée
23 siblings, 1 reply; 32+ messages in thread
From: Alex Bennée @ 2023-02-21 22:52 UTC (permalink / raw)
To: qemu-devel
Cc: Thomas Huth, qemu-arm, qemu-riscv, qemu-s390x, Yoshinori Sato,
nicolas.eder, Stafford Horne, Daniel Henrique Barboza,
Mahmoud Mandour, Taylor Simpson, mads, Marek Vasut,
Artyom Tarasenko, Alistair Francis, qemu-ppc, Yanan Wang,
Sunil Muthuswamy, Cédric Le Goater, Eduardo Habkost,
Bin Meng, Bastian Koppelmann, Palmer Dabbelt, Marcel Apfelbaum,
Laurent Vivier, Philippe Mathieu-Daudé, Michael Rolnik,
Aleksandar Rikalo, Paolo Bonzini, Alex Bennée,
Aurelien Jarno, Xiaojuan Yang, Richard Henderson, Peter Maydell,
Alexandre Iooss, Chris Wulff, Jiaxun Yang, David Gibson,
Edgar E. Iglesias, Greg Kurz, David Hildenbrand, Song Gao,
Ilya Leoshkevich, Max Filippov, Mark Cave-Ayland
While we will continue to include this via cpu-defs it is useful to be
able to define this separately for 32 and 64 bit versions of an
otherwise target independent compilation unit.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
include/exec/cpu-defs.h | 19 +----------------
include/exec/target_long.h | 42 ++++++++++++++++++++++++++++++++++++++
2 files changed, 43 insertions(+), 18 deletions(-)
create mode 100644 include/exec/target_long.h
diff --git a/include/exec/cpu-defs.h b/include/exec/cpu-defs.h
index 21309cf567..98605dfba2 100644
--- a/include/exec/cpu-defs.h
+++ b/include/exec/cpu-defs.h
@@ -58,24 +58,7 @@
# define TARGET_TB_PCREL 0
#endif
-#define TARGET_LONG_SIZE (TARGET_LONG_BITS / 8)
-
-/* target_ulong is the type of a virtual address */
-#if TARGET_LONG_SIZE == 4
-typedef int32_t target_long;
-typedef uint32_t target_ulong;
-#define TARGET_FMT_lx "%08x"
-#define TARGET_FMT_ld "%d"
-#define TARGET_FMT_lu "%u"
-#elif TARGET_LONG_SIZE == 8
-typedef int64_t target_long;
-typedef uint64_t target_ulong;
-#define TARGET_FMT_lx "%016" PRIx64
-#define TARGET_FMT_ld "%" PRId64
-#define TARGET_FMT_lu "%" PRIu64
-#else
-#error TARGET_LONG_SIZE undefined
-#endif
+#include "exec/target_long.h"
#if !defined(CONFIG_USER_ONLY) && defined(CONFIG_TCG)
diff --git a/include/exec/target_long.h b/include/exec/target_long.h
new file mode 100644
index 0000000000..93c9472971
--- /dev/null
+++ b/include/exec/target_long.h
@@ -0,0 +1,42 @@
+/*
+ * Target Long Definitions
+ *
+ * Copyright (c) 2003 Fabrice Bellard
+ * Copyright (c) 2023 Linaro Ltd
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef _TARGET_LONG_H_
+#define _TARGET_LONG_H_
+
+/*
+ * Usually this should only be included via cpu-defs.h however for
+ * certain cases where we want to build only two versions of a binary
+ * object we can include directly. However the build-system must
+ * ensure TARGET_LONG_BITS is defined directly.
+ */
+#ifndef TARGET_LONG_BITS
+#error TARGET_LONG_BITS not defined
+#endif
+
+#define TARGET_LONG_SIZE (TARGET_LONG_BITS / 8)
+
+/* target_ulong is the type of a virtual address */
+#if TARGET_LONG_SIZE == 4
+typedef int32_t target_long;
+typedef uint32_t target_ulong;
+#define TARGET_FMT_lx "%08x"
+#define TARGET_FMT_ld "%d"
+#define TARGET_FMT_lu "%u"
+#elif TARGET_LONG_SIZE == 8
+typedef int64_t target_long;
+typedef uint64_t target_ulong;
+#define TARGET_FMT_lx "%016" PRIx64
+#define TARGET_FMT_ld "%" PRId64
+#define TARGET_FMT_lu "%" PRIu64
+#else
+#error TARGET_LONG_SIZE undefined
+#endif
+
+#endif /* _TARGET_LONG_H_ */
--
2.39.1
^ permalink raw reply related [flat|nested] 32+ messages in thread* Re: [PATCH v3 23/24] include: split target_long definition from cpu-defs
2023-02-21 22:52 ` [PATCH v3 23/24] include: split target_long definition from cpu-defs Alex Bennée
@ 2023-02-22 1:17 ` Richard Henderson
0 siblings, 0 replies; 32+ messages in thread
From: Richard Henderson @ 2023-02-22 1:17 UTC (permalink / raw)
To: Alex Bennée, qemu-devel
On 2/21/23 12:52, Alex Bennée wrote:
> While we will continue to include this via cpu-defs it is useful to be
> able to define this separately for 32 and 64 bit versions of an
> otherwise target independent compilation unit.
>
> Signed-off-by: Alex Bennée<alex.bennee@linaro.org>
> ---
> include/exec/cpu-defs.h | 19 +----------------
> include/exec/target_long.h | 42 ++++++++++++++++++++++++++++++++++++++
> 2 files changed, 43 insertions(+), 18 deletions(-)
> create mode 100644 include/exec/target_long.h
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
r~
^ permalink raw reply [flat|nested] 32+ messages in thread
* [PATCH v3 24/24] gdbstub: split out softmmu/user specifics for syscall handling
2023-02-21 22:52 [PATCH v3 00/24] gdbstub: re-organise to for better compilation behaviour Alex Bennée
` (22 preceding siblings ...)
2023-02-21 22:52 ` [PATCH v3 23/24] include: split target_long definition from cpu-defs Alex Bennée
@ 2023-02-21 22:52 ` Alex Bennée
23 siblings, 0 replies; 32+ messages in thread
From: Alex Bennée @ 2023-02-21 22:52 UTC (permalink / raw)
To: qemu-devel
Cc: Thomas Huth, qemu-arm, qemu-riscv, qemu-s390x, Yoshinori Sato,
nicolas.eder, Stafford Horne, Daniel Henrique Barboza,
Mahmoud Mandour, Taylor Simpson, mads, Marek Vasut,
Artyom Tarasenko, Alistair Francis, qemu-ppc, Yanan Wang,
Sunil Muthuswamy, Cédric Le Goater, Eduardo Habkost,
Bin Meng, Bastian Koppelmann, Palmer Dabbelt, Marcel Apfelbaum,
Laurent Vivier, Philippe Mathieu-Daudé, Michael Rolnik,
Aleksandar Rikalo, Paolo Bonzini, Alex Bennée,
Aurelien Jarno, Xiaojuan Yang, Richard Henderson, Peter Maydell,
Alexandre Iooss, Chris Wulff, Jiaxun Yang, David Gibson,
Edgar E. Iglesias, Greg Kurz, David Hildenbrand, Song Gao,
Ilya Leoshkevich, Max Filippov, Mark Cave-Ayland
Most of the syscall code is config agnostic aside from the size of
target_ulong. In preparation for the next patch move the final bits of
specialisation into the appropriate user and softmmu helpers.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
gdbstub/internals.h | 5 +++++
gdbstub/softmmu.c | 24 ++++++++++++++++++++++++
gdbstub/syscalls.c | 32 +++++++++++---------------------
gdbstub/user.c | 24 ++++++++++++++++++++++++
4 files changed, 64 insertions(+), 21 deletions(-)
diff --git a/gdbstub/internals.h b/gdbstub/internals.h
index fe82facaeb..dce7c4f66f 100644
--- a/gdbstub/internals.h
+++ b/gdbstub/internals.h
@@ -193,6 +193,11 @@ bool gdb_handled_syscall(void);
void gdb_disable_syscalls(void);
void gdb_syscall_reset(void);
+/* user/softmmu specific signal handling */
+void gdb_pre_syscall_handling(void);
+bool gdb_send_syscall_now(void);
+void gdb_post_syscall_handling(void);
+
/*
* Break/Watch point support - there is an implementation for softmmu
* and user mode.
diff --git a/gdbstub/softmmu.c b/gdbstub/softmmu.c
index b7e3829ca0..8f3c8ef449 100644
--- a/gdbstub/softmmu.c
+++ b/gdbstub/softmmu.c
@@ -101,6 +101,30 @@ static void gdb_chr_event(void *opaque, QEMUChrEvent event)
}
}
+/*
+ * In softmmu mode we stop the VM and wait to send the syscall packet
+ * until notification that the CPU has stopped. This must be done
+ * because if the packet is sent now the reply from the syscall
+ * request could be received while the CPU is still in the running
+ * state, which can cause packets to be dropped and state transition
+ * 'T' packets to be sent while the syscall is still being processed.
+ */
+
+void gdb_pre_syscall_handling(void)
+{
+ vm_stop(RUN_STATE_DEBUG);
+}
+
+bool gdb_send_syscall_now(void)
+{
+ return false;
+}
+
+void gdb_post_syscall_handling(void)
+{
+ qemu_cpu_kick(gdbserver_state.c_cpu);
+}
+
static void gdb_vm_state_change(void *opaque, bool running, RunState state)
{
CPUState *cpu = gdbserver_state.c_cpu;
diff --git a/gdbstub/syscalls.c b/gdbstub/syscalls.c
index 1b63a1d197..24eee38136 100644
--- a/gdbstub/syscalls.c
+++ b/gdbstub/syscalls.c
@@ -102,9 +102,10 @@ void gdb_do_syscallv(gdb_syscall_complete_cb cb, const char *fmt, va_list va)
}
gdbserver_syscall_state.current_syscall_cb = cb;
-#ifndef CONFIG_USER_ONLY
- vm_stop(RUN_STATE_DEBUG);
-#endif
+
+ /* user/softmmu specific handling */
+ gdb_pre_syscall_handling();
+
p = &gdbserver_syscall_state.syscall_buf[0];
p_end = &gdbserver_syscall_state.syscall_buf[sizeof(gdbserver_syscall_state.syscall_buf)];
*(p++) = 'F';
@@ -138,24 +139,13 @@ void gdb_do_syscallv(gdb_syscall_complete_cb cb, const char *fmt, va_list va)
}
}
*p = 0;
-#ifdef CONFIG_USER_ONLY
- gdb_put_packet(gdbserver_syscall_state.syscall_buf);
- /* Return control to gdb for it to process the syscall request.
- * Since the protocol requires that gdb hands control back to us
- * using a "here are the results" F packet, we don't need to check
- * gdb_handlesig's return value (which is the signal to deliver if
- * execution was resumed via a continue packet).
- */
- gdb_handlesig(gdbserver_state.c_cpu, 0);
-#else
- /* In this case wait to send the syscall packet until notification that
- the CPU has stopped. This must be done because if the packet is sent
- now the reply from the syscall request could be received while the CPU
- is still in the running state, which can cause packets to be dropped
- and state transition 'T' packets to be sent while the syscall is still
- being processed. */
- qemu_cpu_kick(gdbserver_state.c_cpu);
-#endif
+
+ if (gdb_send_syscall_now()) { /* true only for *-user */
+ gdb_put_packet(gdbserver_syscall_state.syscall_buf);
+ }
+
+ /* user/softmmu specific handling */
+ gdb_post_syscall_handling();
}
void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...)
diff --git a/gdbstub/user.c b/gdbstub/user.c
index cc7eeb9afb..a5227e23cf 100644
--- a/gdbstub/user.c
+++ b/gdbstub/user.c
@@ -467,3 +467,27 @@ void gdb_breakpoint_remove_all(CPUState *cs)
{
cpu_breakpoint_remove_all(cs, BP_GDB);
}
+
+/*
+ * For user-mode syscall support we send the system call immediately
+ * and then return control to gdb for it to process the syscall request.
+ * Since the protocol requires that gdb hands control back to us
+ * using a "here are the results" F packet, we don't need to check
+ * gdb_handlesig's return value (which is the signal to deliver if
+ * execution was resumed via a continue packet).
+ */
+
+void gdb_pre_syscall_handling(void)
+{
+ return;
+}
+
+bool gdb_send_syscall_now(void)
+{
+ return true;
+}
+
+void gdb_post_syscall_handling(void)
+{
+ gdb_handlesig(gdbserver_state.c_cpu, 0);
+}
--
2.39.1
^ permalink raw reply related [flat|nested] 32+ messages in thread