| /* Copyright (C) 2009-2014 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; \ |
| push { r7 }; \ |
| 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); \ |
| pop { r7 }; \ |
| cfi_adjust_cfa_offset (-4); \ |
| cfi_restore (r7); \ |
| CALL_FAIL \ |
| cfi_restore_state; \ |
| .Lok2: \ |
| mov r0, r5; \ |
| cfi_restore_state; \ |
| .Lok: |
| |
| #include <__longjmp.S> |
