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gdbstub: Allow specifying a reason in stop packets

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The upcoming syscall catchpoint support needs to send stop packets with
an associated reason to GDB. Add an extra parameter to gdb_handlesig()
for that, and rename it to gdb_handlesig_reason(). Provide a
compatibility wrapper with an old name.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20240202152506.279476-3-iii@linux.ibm.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20240207163812.3231697-12-alex.bennee@linaro.org>
This commit is contained in:
Ilya Leoshkevich 2024-02-07 16:38:09 +00:00 • committed by Alex Bennée
parent 4aad096587
commit 8b7fcb8ed1
2 changed files with 18 additions and 3 deletions
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5
gdbstub/user.c
View file

@ -121,7 +121,7 @@ void gdb_qemu_exit(int code)
exit(code); exit(code);
} }
int gdb_handlesig(CPUState *cpu, int sig) int gdb_handlesig_reason(CPUState *cpu, int sig, const char *reason)
{ {
char buf[256]; char buf[256];
int n; int n;
@ -141,6 +141,9 @@ int gdb_handlesig(CPUState *cpu, int sig)
"T%02xthread:", gdb_target_signal_to_gdb(sig)); "T%02xthread:", gdb_target_signal_to_gdb(sig));
gdb_append_thread_id(cpu, gdbserver_state.str_buf); gdb_append_thread_id(cpu, gdbserver_state.str_buf);
g_string_append_c(gdbserver_state.str_buf, ';'); g_string_append_c(gdbserver_state.str_buf, ';');
if (reason) {
g_string_append(gdbserver_state.str_buf, reason);
}
gdb_put_strbuf(); gdb_put_strbuf();
gdbserver_state.allow_stop_reply = false; gdbserver_state.allow_stop_reply = false;
} }

16
include/gdbstub/user.h
View file

@ -10,9 +10,10 @@
#define GDBSTUB_USER_H #define GDBSTUB_USER_H
/** /**
* gdb_handlesig() - yield control to gdb * gdb_handlesig_reason() - yield control to gdb
* @cpu: CPU * @cpu: CPU
* @sig: if non-zero, the signal number which caused us to stop * @sig: if non-zero, the signal number which caused us to stop
* @reason: stop reason for stop reply packet or NULL
* *
* This function yields control to gdb, when a user-mode-only target * 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 * needs to stop execution. If @sig is non-zero, then we will send a
@ -24,7 +25,18 @@
* or 0 if no signal should be delivered, ie the signal that caused * or 0 if no signal should be delivered, ie the signal that caused
* us to stop should be ignored. * us to stop should be ignored.
*/ */
int gdb_handlesig(CPUState *, int); int gdb_handlesig_reason(CPUState *, int, const char *);
/**
* gdb_handlesig() - yield control to gdb
* @cpu CPU
* @sig: if non-zero, the signal number which caused us to stop
* @see gdb_handlesig_reason()
*/
static inline int gdb_handlesig(CPUState *cpu, int sig)
{
return gdb_handlesig_reason(cpu, sig, NULL);
}
/** /**
* gdb_signalled() - inform remote gdb of sig exit * gdb_signalled() - inform remote gdb of sig exit