blob: 9d8e4645832ffdfb36f2b8a404b819602ce0f2a9 [file] [log] [blame]
/* Copyright (C) 2009 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 Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sysdep.h>
.section .rodata.str1.1,"aMS",%progbits,1
.type longjmp_msg,%object
longjmp_msg:
.string "longjmp causes uninitialized stack frame"
.size longjmp_msg, .-longjmp_msg
.text
#define __longjmp ____longjmp_chk
#ifdef PIC
# define CALL_FAIL \
ldr sl, .L_GOT; \
cfi_undefined (sl); \
.L_GOT_OFF: \
add sl, pc, sl; \
ldr r0, .Lstr; \
add r0, sl, r0; \
B PLTJMP(HIDDEN_JUMPTARGET(__fortify_fail)); \
.L_GOT: \
.word _GLOBAL_OFFSET_TABLE_-(.L_GOT_OFF+8); \
.Lstr: \
.word longjmp_msg(GOTOFF);
#else
# define CALL_FAIL \
ldr r0, .Lstr; \
B HIDDEN_JUMPTARGET(__fortify_fail); \
.Lstr: \
.word longjmp_msg;
#endif
#define CHECK_SP(reg) \
cfi_remember_state; \
cmp sp, reg; \
bls .Lok; \
str r7, [sp, #-4]!; \
cfi_adjust_cfa_offset (4); \
cfi_rel_offset (r7, 0); \
mov r5, r0; \
cfi_undefined (r5); \
mov r7, #SYS_ify(sigaltstack); \
mov r0, #0; \
sub sp, sp, #12; /* == sizeof (stack_t) */ \
cfi_adjust_cfa_offset (12); \
cfi_remember_state; \
mov r1, sp; \
swi #0; \
cmp r0, #0; \
bne .Lok2; \
ldr r1, [sp, #4]; \
tst r1, #1; \
beq .Lfail; \
ldr r2, [sp, #0]; \
ldr r3, [sp, #8]; \
add r2, r2, r3; \
sub r2, r2, reg; \
cmp r2, r3; \
bhi .Lok2; \
.Lfail: \
add sp, sp, #12; \
cfi_adjust_cfa_offset (-12); \
ldr r7, [sp], #4; \
cfi_adjust_cfa_offset (-4); \
cfi_restore (r7); \
CALL_FAIL \
cfi_restore_state; \
.Lok2: \
mov r0, r5; \
cfi_restore_state; \
.Lok:
#include <__longjmp.S>