projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 2b778ceb | 1 | /* Copyright (C) 2009-2021 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 | 15 | License along with the GNU C Library; if not, see |
| 5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
| 0323b051 AS |
17 | |
| 18 | #include <sysdep.h> | |
| 19 | #include <rtld-global-offsets.h> | |
| 20 | ||
| 15efafdf AS |
21 | .section .rodata.str1.4,"aMS",@progbits,1 |
| 22 | .align 2 | |
| 0323b051 AS |
23 | .LC0: |
| 24 | .string "longjmp causes uninitialized stack frame" | |
| 25 | .text | |
| 26 | ||
| eb5ad6b9 | 27 | #define __longjmp_symbol ____longjmp_chk |
| 0323b051 | 28 | |
| 80a98966 | 29 | #ifdef PIC |
| 80a98966 | 30 | # define LOAD_ARG \ |
| 91d2a845 WS |
31 | SETUP_GOT_ACCESS(r3,got_label2); \ |
| 32 | addis r3,r3,_GLOBAL_OFFSET_TABLE_-got_label2@ha; \ | |
| 33 | addi r3,r3,_GLOBAL_OFFSET_TABLE_-got_label2@l; \ | |
| 80a98966 | 34 | lwz r3,.LC0@got(r3) |
| 80a98966 AS |
35 | #else |
| 36 | # define LOAD_ARG \ | |
| 37 | lis r3,.LC0@ha; \ | |
| 38 | la r3,.LC0@l(r3) | |
| 39 | #endif | |
| 40 | ||
| 0323b051 AS |
41 | #define CHECK_SP(reg) \ |
| 42 | cmplw reg, r1; \ | |
| 43 | bge+ .Lok; \ | |
| 15efafdf AS |
44 | mflr r0; \ |
| 45 | stwu r1,-32(r1); \ | |
| 46 | cfi_remember_state; \ | |
| 47 | cfi_adjust_cfa_offset (32); \ | |
| 48 | stw r0,36(r1); \ | |
| 49 | cfi_offset (lr, 4); \ | |
| 50 | mr r31,r3; \ | |
| 51 | mr r30,r4; \ | |
| 52 | li r3,0; \ | |
| 53 | addi r4,r1,8; \ | |
| 54 | li r0,__NR_sigaltstack; \ | |
| 55 | sc; \ | |
| 56 | /* Without working sigaltstack we cannot perform the test. */ \ | |
| 57 | bso .Lok2; \ | |
| 58 | lwz r0,12(r1); \ | |
| 59 | andi. r3,r0,1; \ | |
| 60 | beq .Lfail; \ | |
| 61 | lwz r0,16(r1); \ | |
| 62 | lwz r3,8(r1); \ | |
| 63 | add r3,r3,r0; \ | |
| 64 | sub r3,r3,reg; \ | |
| 65 | cmplw r3,r0; \ | |
| 66 | bge+ .Lok2; \ | |
| 67 | .Lfail: \ | |
| 80a98966 | 68 | LOAD_ARG; \ |
| 0323b051 | 69 | bl HIDDEN_JUMPTARGET (__fortify_fail); \ |
| 15efafdf AS |
70 | .Lok2: \ |
| 71 | mr r3,r31; \ | |
| 72 | mr r4,r30; \ | |
| 73 | cfi_restore_state; \ | |
| 0323b051 AS |
74 | .Lok: |
| 75 | ||
| 76 | #include <__longjmp-common.S> |