Add GDB qAttached support
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>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
diff --git a/gdbstub.c b/gdbstub.c
index 6c0db4f..0e51280 100644
--- a/gdbstub.c
+++ b/gdbstub.c
@@ -41,6 +41,12 @@
#include "qemu/sockets.h"
#include "sysemu/kvm.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)
{
@@ -1195,6 +1201,10 @@
put_packet_binary(s, buf, len + 1);
break;
}
+ if (is_query_packet(p, "Attached", ':')) {
+ put_packet(s, GDB_ATTACHED);
+ break;
+ }
/* Unrecognised 'q' command. */
goto unknown_command;
