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kgdb: continue and warn on signal passing from gdb 

On some architectures for the segv trap, gdb wants to pass the signal
back on continue.  For kgdb this is not the default behavior, because
it can cause the kernel to crash if you arbitrarily pass back a
exception outside of kgdb.

Instead of causing instability, pass a message back to gdb about the
supported kgdb signal passing and execute a standard kgdb continue
operation.

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
This commit is contained in:
Jason Wessel 2009-04-27 13:20:21 -05:00
parent 8097551d9a
commit d625e9c0d7
1 changed files with 4 additions and 2 deletions
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6
kernel/kgdb.c
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@ -1210,8 +1210,10 @@ static int gdb_cmd_exception_pass(struct kgdb_state *ks)
return 1;
} else {
error_packet(remcom_out_buffer, -EINVAL);
return 0;
kgdb_msg_write("KGDB only knows signal 9 (pass)"
" and 15 (pass and disconnect)\n"
"Executing a continue without signal passing\n", 0);
remcom_in_buffer[0] = 'c';
}
/* Indicate fall through */