projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| b168057a | 1 | /* Copyright (C) 2009-2015 Free Software Foundation, Inc. |
| 0323b051 AS |
2 | This file is part of the GNU C Library. |
| 3 | ||
| 4 | The GNU C Library is free software; you can redistribute it and/or | |
| 5 | modify it under the terms of the GNU Lesser General Public | |
| 6 | License as published by the Free Software Foundation; either | |
| 7 | version 2.1 of the License, or (at your option) any later version. | |
| 8 | ||
| 9 | The GNU C Library is distributed in the hope that it will be useful, | |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 12 | Lesser General Public License for more details. | |
| 13 | ||
| 14 | You should have received a copy of the GNU Lesser General Public | |
| 59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
| 16 | <http://www.gnu.org/licenses/>. */ | |
| 0323b051 AS |
17 | |
| 18 | #include <sysdep.h> | |
| 19 | #include <rtld-global-offsets.h> | |
| 20 | ||
| 15efafdf AS |
21 | .section .rodata.str1.8,"aMS",@progbits,1 |
| 22 | .align 3 | |
| 0323b051 AS |
23 | .LC0: |
| 24 | .string "longjmp causes uninitialized stack frame" | |
| 25 | .section .toc,"aw" | |
| 26 | .LC1: | |
| 27 | .tc .LC0[TC],.LC0 | |
| 28 | .text | |
| 29 | ||
| 30 | #define __longjmp ____longjmp_chk | |
| 31 | ||
| 32 | #define CHECK_SP(reg) \ | |
| 33 | cmpld reg, r1; \ | |
| 34 | bge+ .Lok; \ | |
| 15efafdf | 35 | mflr r0; \ |
| 8b8a692c | 36 | std r0,FRAME_LR_SAVE(r1); \ |
| 15efafdf AS |
37 | mr r31,r3; \ |
| 38 | mr r30,r4; \ | |
| 8b8a692c | 39 | stdu r1,-FRAME_MIN_SIZE-32(r1); \ |
| 15efafdf | 40 | cfi_remember_state; \ |
| 8b8a692c UW |
41 | cfi_adjust_cfa_offset (FRAME_MIN_SIZE+32); \ |
| 42 | cfi_offset (lr, FRAME_LR_SAVE); \ | |
| 15efafdf | 43 | li r3,0; \ |
| 8b8a692c | 44 | addi r4,r1,FRAME_MIN_SIZE; \ |
| 15efafdf AS |
45 | li r0,__NR_sigaltstack; \ |
| 46 | sc; \ | |
| 47 | /* Without working sigaltstack we cannot perform the test. */ \ | |
| 48 | bso .Lok2; \ | |
| 8b8a692c | 49 | lwz r0,FRAME_MIN_SIZE+8(r1); \ |
| 15efafdf AS |
50 | andi. r4,r0,1; \ |
| 51 | beq .Lfail; \ | |
| 8b8a692c UW |
52 | ld r0,FRAME_MIN_SIZE+16(r1); \ |
| 53 | ld r4,FRAME_MIN_SIZE(r1); \ | |
| 15efafdf AS |
54 | add r4,r4,r0; \ |
| 55 | sub r3,r3,reg; \ | |
| 56 | cmpld r3,r0; \ | |
| 57 | bge+ .Lok2; \ | |
| 58 | .Lfail: \ | |
| 0323b051 AS |
59 | ld r3,.LC1@toc(2); \ |
| 60 | bl HIDDEN_JUMPTARGET (__fortify_fail); \ | |
| 15efafdf AS |
61 | nop; \ |
| 62 | .Lok2: \ | |
| 63 | mr r3,r31; \ | |
| 64 | mr r4,r30; \ | |
| 65 | cfi_restore_state; \ | |
| 0323b051 AS |
66 | .Lok: |
| 67 | ||
| 68 | #include <__longjmp-common.S> |