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/* Return backtrace of current program state.
Copyright (C) 2008-2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by David S. Miller <davem@davemloft.net>
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, see <http://www.gnu.org/licenses/>. */
#include <execinfo.h>
#include <stddef.h>
#include <bp-checks.h>
#include <sysdep.h>
struct layout
{
unsigned long locals[8];
unsigned long ins[6];
unsigned long next;
void *__unbounded return_address;
};
int
__backtrace (void **array, int size)
{
struct layout *current;
unsigned long fp;
int count;
asm volatile ("flushw");
asm volatile ("mov %%fp, %0" : "=r"(fp));
current = (struct layout *__unbounded) (fp + STACK_BIAS);
current = BOUNDED_1 (current);
for (count = 0; count < size; count++)
{
array[count] = current->return_address;
if (!current->next)
break;
current = (struct layout *__unbounded) (current->next + STACK_BIAS);
current = BOUNDED_1 (current);
}
return count;
}
weak_alias (__backtrace, backtrace)
libc_hidden_def (__backtrace)
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