| /* 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> |
| #include <rtld-global-offsets.h> |
| |
| .section .rodata.str1.4,"aMS",@progbits,1 |
| .align 2 |
| .LC0: |
| .string "longjmp causes uninitialized stack frame" |
| .text |
| |
| #define __longjmp ____longjmp_chk |
| |
| #ifdef PIC |
| # define LOAD_ARG \ |
| bcl 20,31,1f; \ |
| 1: mflr r3; \ |
| addis r3,r3,_GLOBAL_OFFSET_TABLE_-1b@ha; \ |
| addi r3,r3,_GLOBAL_OFFSET_TABLE_-1b@l; \ |
| lwz r3,.LC0@got(r3) |
| #else |
| # define LOAD_ARG \ |
| lis r3,.LC0@ha; \ |
| la r3,.LC0@l(r3) |
| #endif |
| |
| #define CHECK_SP(reg) \ |
| cmplw reg, r1; \ |
| bge+ .Lok; \ |
| mflr r0; \ |
| stwu r1,-32(r1); \ |
| cfi_remember_state; \ |
| cfi_adjust_cfa_offset (32); \ |
| stw r0,36(r1); \ |
| cfi_offset (lr, 4); \ |
| mr r31,r3; \ |
| mr r30,r4; \ |
| li r3,0; \ |
| addi r4,r1,8; \ |
| li r0,__NR_sigaltstack; \ |
| sc; \ |
| /* Without working sigaltstack we cannot perform the test. */ \ |
| bso .Lok2; \ |
| lwz r0,12(r1); \ |
| andi. r3,r0,1; \ |
| beq .Lfail; \ |
| lwz r0,16(r1); \ |
| lwz r3,8(r1); \ |
| add r3,r3,r0; \ |
| sub r3,r3,reg; \ |
| cmplw r3,r0; \ |
| bge+ .Lok2; \ |
| .Lfail: \ |
| LOAD_ARG; \ |
| bl HIDDEN_JUMPTARGET (__fortify_fail); \ |
| .Lok2: \ |
| mr r3,r31; \ |
| mr r4,r30; \ |
| cfi_restore_state; \ |
| .Lok: |
| |
| #include <__longjmp-common.S> |
