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gdbstub: Add Xfer:siginfo:read stub

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Add stub to handle Xfer:siginfo:read packet query that requests the
machine's siginfo data.

This is used when GDB user executes 'print $_siginfo' and when the
machine stops due to a signal, for instance, on SIGSEGV. The information
in siginfo allows GDB to determiner further details on the signal, like
the fault address/insn when the SIGSEGV is caught.

Signed-off-by: Gustavo Romero <gustavo.romero@linaro.org>
Message-Id: <20240309030901.1726211-5-gustavo.romero@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Gustavo Romero 2024-03-09 03:09:00 +00:00 • committed by Alex Bennée
parent f84e313e02
commit 9ae5801d35
3 changed files with 32 additions and 0 deletions
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8
gdbstub/gdbstub.c
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@ -1664,6 +1664,8 @@ static void handle_query_supported(GArray *params, void *user_ctx)
g_string_append(gdbserver_state.str_buf, ";qXfer:auxv:read+");
}
g_string_append(gdbserver_state.str_buf, ";QCatchSyscalls+");
g_string_append(gdbserver_state.str_buf, ";qXfer:siginfo:read+");
#endif
g_string_append(gdbserver_state.str_buf, ";qXfer:exec-file:read+");
#endif
@ -1818,6 +1820,12 @@ static const GdbCmdParseEntry gdb_gen_query_table[] = {
.cmd_startswith = 1,
.schema = "l,l0"
},
{
.handler = gdb_handle_query_xfer_siginfo,
.cmd = "Xfer:siginfo:read::",
.cmd_startswith = 1,
.schema = "l,l0"
},
#endif
{
.handler = gdb_handle_query_xfer_exec_file,