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Add partial implementation for is_signal_frame for i386.

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Konstantin Belousov 2010-03-11 00:50:40 +02:00
parent 54f8b2fdbe
commit a6b23dcb0c
1 changed files with 44 additions and 2 deletions
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46
src/x86/Gis_signal_frame.c
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@ -28,7 +28,7 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
PROTECTED int
unw_is_signal_frame (unw_cursor_t *cursor)
{
#ifdef __linux__
#if defined __linux__
struct cursor *c = (struct cursor *) cursor;
unw_word_t w0, w1, ip;
unw_addr_space_t as;
@ -64,8 +64,50 @@ unw_is_signal_frame (unw_cursor_t *cursor)
|| (w0 == 0x0000adb8 && w1 == 0x9080cd00));
Debug (16, "returning %d\n", ret);
return ret;
#elif defined __FreeBSD__
struct cursor *c = (struct cursor *) cursor;
unw_word_t w0, w1, w2, w3, w4, w5, ip;
unw_addr_space_t as;
unw_accessors_t *a;
void *arg;
int ret;
as = c->dwarf.as;
a = unw_get_accessors (as);
arg = c->dwarf.as_arg;
/* Check if EIP points at sigreturn() sequence. It can be:
sigcode+4:
8d 44 24 20 lea 0x20(%esp),%eax
50 push %eax
f7 40 54 00 02 00 testl $0x20000,0x54(%eax)
75 03 jne sigcode+21
8e 68 14 mov 0x14(%eax),%gs
b8 a1 01 00 00 mov $0x1a1,%eax
50 push %eax
cd 80 int $0x80
freebsd4_sigcode+4:
XXX
osigcode:
XXX
*/
ip = c->dwarf.ip;
if ((ret = (*a->access_mem) (as, ip, &w0, 0, arg)) < 0 ||
(ret = (*a->access_mem) (as, ip + 4, &w1, 0, arg)) < 0 ||
(ret = (*a->access_mem) (as, ip + 8, &w2, 0, arg)) < 0 ||
(ret = (*a->access_mem) (as, ip + 16, &w3, 0, arg)) < 0 ||
(ret = (*a->access_mem) (as, ip + 20, &w4, 0, arg)) < 0 ||
(ret = (*a->access_mem) (as, ip + 24, &w5, 0, arg)) < 0)
return ret;
ret = (w0 == 0x2024448d && w1 == 0x5440f750 && w2 == 0x75000200 &&
w3 == 0x14688e03 && w4 == 0x0001a1b8 && w5 == 0x80cd5000);
if (ret != 0)
return (1);
Debug (16, "returning %d\n", ret);
return (0);
#else
printf ("%s: implement me\n", __FUNCTION__);
#error Port me
#endif
return -UNW_ENOINFO;
}