glibc/sysdeps/i386/backtrace.c
Greg McGary 41d998a683 Update.
2000-07-29  Greg McGary  <greg@mcgary.org>

	* Rules (test-bp-inputs, make-test-out): New variables.
	($(objpfx)%-bp.out): New rule.
	($(objpfx)%.out): Rewrite in terms of new variables.

	* libio/iovswscanf.c (vswscanf): Pass _IO_FILE_plus pointer to
	internal function that uses vtable.
	* libio/vsnprintf.c (_IO_vsnprintf): Likewise.
	* libio/vswprintf.c (_IO_vswprintf): Likewise.

	* malloc/malloc.c (mem2chunk): Define in terms of chunk_at_offset.
	(malloc_extend_top): Convert brk to chunk using chunk_at_offset.
	(chunk_align): Likewise.

	* time/asctime.c (ab_day_name, ab_month_name): Rewrite expression
	in a way that conforms to decl, and avoids spurious bounds violation.

	* sysdeps/arm/frame.h (struct layout): Make pointers __unbounded.
	* sysdeps/generic/frame.h: Likewise.
	* sysdeps/generic/backtrace.c (ADVANCE_STACK_FRAME): Wrap bounds
	around return value.
	(__backtrace): Qualify frame-pointer chain and return address
	pointers as __unbounded.  Wrap bounds around variable `current'.
	* sysdeps/generic/segfault.c (ADVANCE_STACK_FRAME): Wrap bounds
	around return value.
	(catch_segfault): Qualify frame-pointer chain and return address
	pointers as __unbounded.  Wrap bounds around variable `current'.
	* sysdeps/i386/backtrace.c (struct layout): Make pointers __unbounded.
	(ADVANCE_STACK_FRAME): Wrap bounds around return value.
	* sysdeps/powerpc/backtrace.c (struct layout): Make pointers __unbounded.
	(__backtrace): Qualify frame-pointer chain and return address
	pointers as __unbounded.  Wrap bounds around variable `current'.

	* sysdeps/i386/addmul_1.S: s2_limb is scalar so remove bounds check.
	* sysdeps/i386/mul_1.S: Likewise.
	* sysdeps/i386/submul_1.S: Likewise.
	* sysdeps/i386/i586/addmul_1.S: Likewise.
	* sysdeps/i386/i586/mul_1.S: Add bounds checks.
	* sysdeps/i386/i586/submul_1.S: Likewise.
2000-07-29 08:11:47 +00:00

73 lines
2.4 KiB
C

/* Return backtrace of current program state.
Copyright (C) 1998, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
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 <bp-checks.h>
/* This is a global variable set at program start time. It marks the
highest used stack address. */
extern void *__libc_stack_end;
/* This is the stack alyout we see with every stack frame.
+-----------------+ +-----------------+
%ebp -> | %ebp last frame--------> | %ebp last frame--->...
| | | |
| return address | | return address |
+-----------------+ +-----------------+
*/
struct layout
{
struct layout *__unbounded next;
void *__unbounded return_address;
};
int
__backtrace (array, size)
void **array;
int size;
{
/* We assume that all the code is generated with frame pointers set. */
register void *ebp __asm__ ("ebp");
register void *esp __asm__ ("esp");
struct layout *current;
int cnt = 0;
/* We skip the call to this function, it makes no sense to record it. */
current = BOUNDED_1 ((struct layout *) ebp);
while (cnt < size)
{
if ((void *) current < esp || (void *) current > __libc_stack_end)
/* This means the address is out of range. Note that for the
toplevel we see a frame pointer with value NULL which clearly is
out of range. */
break;
array[cnt++] = current->return_address;
current = current->next;
}
return cnt;
}
weak_alias (__backtrace, backtrace)