From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Cc: peter.maydell@linaro.org, laurent@vivier.eu
Subject: [PATCH v2 22/30] linux-user/mips: Improve do_break
Date: Sat, 21 Aug 2021 20:55:29 -0700 [thread overview]
Message-ID: <20210822035537.283193-23-richard.henderson@linaro.org> (raw)
In-Reply-To: <20210822035537.283193-1-richard.henderson@linaro.org>
Rename to do_tr_or_bp, as per the kernel function.
Add a 'trap' argument, akin to the kernel's si_code, but clearer.
The return value is always 0, so change the return value to void.
Use force_sig and force_sig_fault.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
linux-user/mips/cpu_loop.c | 47 ++++++++++++++++++++++----------------
1 file changed, 27 insertions(+), 20 deletions(-)
diff --git a/linux-user/mips/cpu_loop.c b/linux-user/mips/cpu_loop.c
index 9d813ece4e..797b6bf659 100644
--- a/linux-user/mips/cpu_loop.c
+++ b/linux-user/mips/cpu_loop.c
@@ -21,6 +21,7 @@
#include "qemu-common.h"
#include "qemu.h"
#include "cpu_loop-common.h"
+#include "signal-common.h"
#include "elf.h"
#include "internal.h"
#include "fpu_helper.h"
@@ -38,29 +39,25 @@ enum {
BRK_DIVZERO = 7
};
-static int do_break(CPUMIPSState *env, target_siginfo_t *info,
- unsigned int code)
+static void do_tr_or_bp(CPUMIPSState *env, unsigned int code, bool trap)
{
- int ret = -1;
+ target_ulong pc = env->active_tc.PC;
switch (code) {
case BRK_OVERFLOW:
+ force_sig_fault(TARGET_SIGFPE, TARGET_FPE_INTOVF, pc);
+ break;
case BRK_DIVZERO:
- info->si_signo = TARGET_SIGFPE;
- info->si_errno = 0;
- info->si_code = (code == BRK_OVERFLOW) ? FPE_INTOVF : FPE_INTDIV;
- queue_signal(env, info->si_signo, QEMU_SI_FAULT, &*info);
- ret = 0;
+ force_sig_fault(TARGET_SIGFPE, TARGET_FPE_INTDIV, pc);
break;
default:
- info->si_signo = TARGET_SIGTRAP;
- info->si_errno = 0;
- queue_signal(env, info->si_signo, QEMU_SI_FAULT, &*info);
- ret = 0;
+ if (trap) {
+ force_sig(TARGET_SIGTRAP);
+ } else {
+ force_sig_fault(TARGET_SIGTRAP, TARGET_TRAP_BRKPT, pc);
+ }
break;
}
-
- return ret;
}
void cpu_loop(CPUMIPSState *env)
@@ -214,6 +211,13 @@ done_syscall:
abi_ulong trap_instr;
unsigned int code;
+ /*
+ * FIXME: It would be better to decode the trap number
+ * during translate, and store it in error_code while
+ * raising the exception. We should not be re-reading
+ * the opcode here.
+ */
+
if (env->hflags & MIPS_HFLAG_M16) {
if (env->insn_flags & ASE_MICROMIPS) {
/* microMIPS mode */
@@ -266,9 +270,7 @@ done_syscall:
}
}
- if (do_break(env, &info, code) != 0) {
- goto error;
- }
+ do_tr_or_bp(env, code, false);
}
break;
case EXCP_TRAP:
@@ -276,6 +278,13 @@ done_syscall:
abi_ulong trap_instr;
unsigned int code = 0;
+ /*
+ * FIXME: It would be better to decode the trap number
+ * during translate, and store it in error_code while
+ * raising the exception. We should not be re-reading
+ * the opcode here.
+ */
+
if (env->hflags & MIPS_HFLAG_M16) {
/* microMIPS mode */
abi_ulong instr[2];
@@ -302,9 +311,7 @@ done_syscall:
}
}
- if (do_break(env, &info, code) != 0) {
- goto error;
- }
+ do_tr_or_bp(env, code, true);
}
break;
case EXCP_ATOMIC:
--
2.25.1
next prev parent reply other threads:[~2021-08-22 4:12 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-22 3:55 [PATCH v2 00/30] linux-user: Clean up siginfo_t handling Richard Henderson
2021-08-22 3:55 ` [PATCH v2 01/30] linux-user/aarch64: Set siginfo_t addr field for SIGTRAP signals Richard Henderson
2021-08-22 3:55 ` [PATCH v2 02/30] linux-user/arm: " Richard Henderson
2021-08-22 3:55 ` [PATCH v2 03/30] linux-user/arm: Use force_sig() to deliver fpa11 emulation SIGFPE Richard Henderson
2021-08-22 3:55 ` [PATCH v2 04/30] linux-user: Zero out target_siginfo_t in force_sig() Richard Henderson
2021-08-24 16:32 ` Philippe Mathieu-Daudé
2021-08-22 3:55 ` [PATCH v2 05/30] linux-user: Provide new force_sig_fault() function Richard Henderson
2021-08-24 16:36 ` Philippe Mathieu-Daudé
2021-08-22 3:55 ` [PATCH v2 06/30] linux-user: Provide new force_sigsegv_for_addr() function Richard Henderson
2021-08-24 16:20 ` Peter Maydell
2021-08-22 3:55 ` [PATCH v2 07/30] linux-user/arm: Use force_sig_fault() Richard Henderson
2021-08-24 16:38 ` Philippe Mathieu-Daudé
2021-08-22 3:55 ` [PATCH v2 08/30] linux-user/aarch64: " Richard Henderson
2021-08-24 16:39 ` Philippe Mathieu-Daudé
2021-08-22 3:55 ` [PATCH v2 09/30] linux-user/alpha: Set TRAP_UNK for bugchk and unknown gentrap Richard Henderson
2021-08-24 16:22 ` Peter Maydell
2021-08-22 3:55 ` [PATCH v2 10/30] linux-user/alpha: Set FPE_FLTUNK for gentrap ROPRAND Richard Henderson
2021-08-24 16:22 ` Peter Maydell
2021-08-22 3:55 ` [PATCH v2 11/30] linux-user/alpha: Use force_sig_fault, force_sigsegv_code Richard Henderson
2021-08-24 16:24 ` Peter Maydell
2021-08-22 3:55 ` [PATCH v2 12/30] linux-user/cris: " Richard Henderson
2021-08-24 16:27 ` Peter Maydell
2021-08-22 3:55 ` [PATCH v2 13/30] linux-user/hexagon: Use force_sigsegv_code Richard Henderson
2021-08-24 16:29 ` Peter Maydell
2021-08-22 3:55 ` [PATCH v2 14/30] linux-user/hppa: Use force_sig_fault, force_sigsegv_for_addr Richard Henderson
2021-08-24 16:32 ` Peter Maydell
2021-08-22 3:55 ` [PATCH v2 15/30] linux-user/hppa: Use the proper si_code for PRIV_OPR, PRIV_REG, OVERFLOW Richard Henderson
2021-08-24 16:34 ` Peter Maydell
2021-08-22 3:55 ` [PATCH v2 16/30] linux-user/hppa: Set FPE_CONDTRAP for COND Richard Henderson
2021-08-24 16:37 ` Peter Maydell
2021-08-22 3:55 ` [PATCH v2 17/30] linux-user/i386: Split out maybe_handle_vm86_trap Richard Henderson
2021-08-24 16:38 ` Peter Maydell
2021-08-22 3:55 ` [PATCH v2 18/30] linux-user/i386: Use force_sig, force_sig_fault, force_sigsegv_for_addr Richard Henderson
2021-08-24 16:40 ` Peter Maydell
2021-08-22 3:55 ` [PATCH v2 19/30] linux-user/m68k: Use " Richard Henderson
2021-08-24 16:41 ` Peter Maydell
2021-08-22 3:55 ` [PATCH v2 20/30] linux-user/microblaze: " Richard Henderson
2021-08-24 16:42 ` Peter Maydell
2021-08-22 3:55 ` [PATCH v2 21/30] linux-user/microblaze: Fix SIGFPE si_codes Richard Henderson
2021-08-24 16:55 ` Peter Maydell
2021-08-22 3:55 ` Richard Henderson [this message]
2021-08-24 16:46 ` [PATCH v2 22/30] linux-user/mips: Improve do_break Philippe Mathieu-Daudé
2021-08-22 3:55 ` [PATCH v2 23/30] linux-user/mips: Use force_sig_fault, force_sigsegv_for_addr Richard Henderson
2021-08-24 17:04 ` Peter Maydell
2021-08-22 3:55 ` [PATCH v2 24/30] linux-user/openrisc: " Richard Henderson
2021-08-24 17:17 ` Peter Maydell
2021-09-19 17:49 ` Richard Henderson
2021-09-21 20:26 ` Stafford Horne
2021-08-22 3:55 ` [PATCH v2 25/30] linux-user/ppc: " Richard Henderson
2021-08-24 17:19 ` Peter Maydell
2021-08-22 3:55 ` [PATCH v2 26/30] linux-user/riscv: " Richard Henderson
2021-08-24 17:23 ` Peter Maydell
2021-08-22 3:55 ` [PATCH v2 27/30] linux-user/s390x: " Richard Henderson
2021-08-24 17:23 ` Peter Maydell
2021-08-22 3:55 ` [PATCH v2 28/30] linux-user/sh4: " Richard Henderson
2021-08-24 17:24 ` Peter Maydell
2021-08-22 3:55 ` [PATCH v2 29/30] linux-user/sparc: " Richard Henderson
2021-08-24 17:25 ` Peter Maydell
2021-08-22 3:55 ` [PATCH v2 30/30] linux-user/xtensa: " Richard Henderson
2021-08-24 17:26 ` Peter Maydell
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