[Qemu-devel] [PATCH] Fix qemu endless loop when raising a SIGSEGV/SIGBUS signal with gdbstub in user emulation

[Lionel Landwerlin]

Let's compile a very simple program :

#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>

int
main (int argc, char *argv[])
{
        int *i = NULL;

        sleep (1);

        *i = 42;

        return EXIT_SUCCESS;
}

Now run this program under qemu with gdbstub :

qemu -g 1234 ./test-segfault

Run gdb on the same program, connect it to qemu and start execution.
This program will raise a SIGSEGV signal and qemu will be locked in an
endless loop. Gdb will never be notify by qemu of SIGSEGV signal.

The following post provides a fix for that.

Regards,


-- 
Lione Landwerlin                                         

O p e n W i d e                    14, rue Gaillon 75002 Paris