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Rename: src/x86/Gis_signal_frame-x86.c -> src/x86/Gis_signal_frame.c

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(Logical change 1.241)
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homeip.net!davidm 2004-08-17 15:34:28 +00:00
parent 475062bfda
commit e1eb2d4656
1 changed files with 71 additions and 0 deletions
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src/x86/Gis_signal_frame.c
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/* libunwind - a platform-independent unwind library
Copyright (C) 2002-2003 Hewlett-Packard Co
Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
This file is part of libunwind.
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
#include "unwind_i.h"
PROTECTED int
unw_is_signal_frame (unw_cursor_t *cursor)
{
#ifdef __linux__
struct cursor *c = (struct cursor *) cursor;
unw_word_t w0, w1, 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. On Linux, this is:
__restore:
0x58 pop %eax
0xb8 0x77 0x00 0x00 0x00 movl 0x77,%eax
0xcd 0x80 int 0x80
without SA_SIGINFO, and
__restore_rt:
0xb8 0xad 0x00 0x00 0x00 movl 0x80,%eax
0xcd 0x80 int 0x80
0x90 nop
if SA_SIGINFO is specified.
*/
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)
return ret;
ret = ((w0 == 0x0077b858 && w1 == 0x80cd0000)
|| (w0 == 0x0000adb8 && w1 == 0x9080cd00));
Debug (16, "returning %d\n", ret);
return ret;
#else
printf ("%s: implement me\n", __FUNCTION__);
#endif
return -UNW_ENOINFO;
}