[Qemu-devel] [PATCH v2 1/2] Add GDB qAttached support

[Jan Kiszka <jan.kiszka@siemens.com>]

With this patch QEMU handles qAttached request from gdb. When QEMU
replies 1, GDB sends a "detach" command at the end of a debugging
session otherwise GDB sends "kill".

The default value for qAttached is 1 on system emulation and 0 on user
emulation.

Based on original version by Fabien Chouteau.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---

v2: Rebase over master

 gdbstub.c |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/gdbstub.c b/gdbstub.c
index 35ca7c2..4a6cc51 100644
--- a/gdbstub.c
+++ b/gdbstub.c
@@ -42,6 +42,12 @@
 #include "sysemu/kvm.h"
 #include "qemu/bitops.h"
 
+#ifdef CONFIG_USER_ONLY
+#define GDB_ATTACHED "0"
+#else
+#define GDB_ATTACHED "1"
+#endif
+
 static inline int target_memory_rw_debug(CPUState *cpu, target_ulong addr,
                                          uint8_t *buf, int len, bool is_write)
 {
@@ -2489,6 +2495,10 @@ static int gdb_handle_packet(GDBState *s, const char *line_buf)
             break;
         }
 #endif
+        if (strncmp(p, "Attached", 8) == 0) {
+            put_packet(s, GDB_ATTACHED);
+            break;
+        }
         /* Unrecognised 'q' command.  */
         goto unknown_command;
 
-- 
1.7.3.4