mirror of
git://sourceware.org/git/glibc.git
synced 2024-11-27 03:41:23 +08:00
c2a329735e
* sysdeps/powerpc/dl-machine.h (elf_machine_matches_host): Mark static inline, not extern inline. (elf_machine_dynamic): Likewise. (elf_machine_lazy_rel): Likewise. (elf_machine_plt_value): Likewise. * sysdeps/powerpc/backtrace.c: Include stddef.h to get NULL definition. Patches by Franz Sirl <Franz.Sirl-kernel@lauterbach.com>.
65 lines
2.1 KiB
C
65 lines
2.1 KiB
C
/* Return backtrace of current program state.
|
|
Copyright (C) 1998 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <execinfo.h>
|
|
#include <stddef.h>
|
|
|
|
/* This is the stack layout we see with every stack frame.
|
|
Note that every routine is required by the ABI to lay out the stack
|
|
like this.
|
|
|
|
+----------------+ +-----------------+
|
|
%r1 -> | %r1 last frame--------> | %r1 last frame--->... --> NULL
|
|
| | | |
|
|
| (unused) | | return address |
|
|
+----------------+ +-----------------+
|
|
*/
|
|
struct layout
|
|
{
|
|
struct layout *next;
|
|
void *return_address;
|
|
};
|
|
|
|
int
|
|
__backtrace (void **array, int size)
|
|
{
|
|
struct layout *current;
|
|
int count;
|
|
|
|
/* Force gcc to spill LR. */
|
|
asm volatile ("" : "=l"(current));
|
|
|
|
/* Get the address on top-of-stack. */
|
|
asm volatile ("lwz %0,0(1)" : "=r"(current));
|
|
|
|
for ( count = 0;
|
|
current != NULL && count < size;
|
|
current = current->next, count++)
|
|
array[count] = current->return_address;
|
|
|
|
/* It's possible the second-last stack frame can't return
|
|
(that is, it's __libc_start_main), in which case
|
|
the CRT startup code will have set its LR to 'NULL'. */
|
|
if (count > 0 && array[count-1] == NULL)
|
|
count--;
|
|
|
|
return count;
|
|
}
|
|
weak_alias (__backtrace, backtrace)
|