diff options
author | Joseph Myers <joseph@codesourcery.com> | 2012-07-01 13:08:59 +0000 |
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committer | Joseph Myers <joseph@codesourcery.com> | 2012-07-01 13:08:59 +0000 |
commit | e84eabb3871c9b39e59323bf3f6b98c2ca9d1cd0 (patch) | |
tree | dff3f1b79454b518d15a7b9bbedeb57ff156bbe8 /ports/sysdeps/unix/sysv/linux/arm/____longjmp_chk.S | |
parent | 75f0d3040a2c2de8842bfa7a09e11da1a73e17d0 (diff) | |
parent | e64ac02c24b43659048622714afdc92fedf561fa (diff) |
Merge glibc-ports into ports/ directory.glibc-2.16-ports-merge
Diffstat (limited to 'ports/sysdeps/unix/sysv/linux/arm/____longjmp_chk.S')
-rw-r--r-- | ports/sysdeps/unix/sysv/linux/arm/____longjmp_chk.S | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/ports/sysdeps/unix/sysv/linux/arm/____longjmp_chk.S b/ports/sysdeps/unix/sysv/linux/arm/____longjmp_chk.S new file mode 100644 index 0000000000..8ec41521ca --- /dev/null +++ b/ports/sysdeps/unix/sysv/linux/arm/____longjmp_chk.S @@ -0,0 +1,90 @@ +/* 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, see + <http://www.gnu.org/licenses/>. */ + +#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> |