projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 04277e02 | 1 | /* Copyright (C) 2009-2019 Free Software Foundation, Inc. |
| ef889ffe JM |
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 | ||
| 22423683 | 14 | You should have received a copy of the GNU Lesser General Public |
| ab84e3ff | 15 | License along with the GNU C Library. If not, see |
| 5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
| ef889ffe | 17 | |
| 53df8bce | 18 | #include <sysdep.h> |
| ef889ffe JM |
19 | |
| 20 | .section .rodata.str1.1,"aMS",%progbits,1 | |
| 21 | .type longjmp_msg,%object | |
| 22 | longjmp_msg: | |
| 23 | .string "longjmp causes uninitialized stack frame" | |
| 24 | .size longjmp_msg, .-longjmp_msg | |
| 25 | .text | |
| 26 | ||
| 27 | #define __longjmp ____longjmp_chk | |
| 28 | ||
| 29 | #ifdef PIC | |
| 30 | # define CALL_FAIL \ | |
| 31 | ldr sl, .L_GOT; \ | |
| 01b32e73 | 32 | cfi_undefined (sl); \ |
| ef889ffe JM |
33 | .L_GOT_OFF: \ |
| 34 | add sl, pc, sl; \ | |
| 35 | ldr r0, .Lstr; \ | |
| 36 | add r0, sl, r0; \ | |
| 37 | B PLTJMP(HIDDEN_JUMPTARGET(__fortify_fail)); \ | |
| 38 | .L_GOT: \ | |
| 39 | .word _GLOBAL_OFFSET_TABLE_-(.L_GOT_OFF+8); \ | |
| 40 | .Lstr: \ | |
| 41 | .word longjmp_msg(GOTOFF); | |
| 42 | #else | |
| 43 | # define CALL_FAIL \ | |
| 44 | ldr r0, .Lstr; \ | |
| 45 | B HIDDEN_JUMPTARGET(__fortify_fail); \ | |
| 46 | .Lstr: \ | |
| 47 | .word longjmp_msg; | |
| 48 | #endif | |
| 49 | ||
| 50 | #define CHECK_SP(reg) \ | |
| 01b32e73 | 51 | cfi_remember_state; \ |
| 53df8bce | 52 | cmp sp, reg; \ |
| bf89c0e2 | 53 | bls .Lok; \ |
| 55668624 | 54 | push { r7 }; \ |
| 420d6ddd RT |
55 | cfi_adjust_cfa_offset (4); \ |
| 56 | cfi_rel_offset (r7, 0); \ | |
| 53df8bce | 57 | mov r5, r0; \ |
| 01b32e73 | 58 | cfi_undefined (r5); \ |
| 53df8bce JM |
59 | mov r7, #SYS_ify(sigaltstack); \ |
| 60 | mov r0, #0; \ | |
| 420d6ddd RT |
61 | sub sp, sp, #12; /* == sizeof (stack_t) */ \ |
| 62 | cfi_adjust_cfa_offset (12); \ | |
| 01b32e73 | 63 | cfi_remember_state; \ |
| 53df8bce JM |
64 | mov r1, sp; \ |
| 65 | swi #0; \ | |
| 66 | cmp r0, #0; \ | |
| 67 | bne .Lok2; \ | |
| 68 | ldr r1, [sp, #4]; \ | |
| 69 | tst r1, #1; \ | |
| 70 | beq .Lfail; \ | |
| 71 | ldr r2, [sp, #0]; \ | |
| 72 | ldr r3, [sp, #8]; \ | |
| 73 | add r2, r2, r3; \ | |
| 74 | sub r2, r2, reg; \ | |
| 75 | cmp r2, r3; \ | |
| 76 | bhi .Lok2; \ | |
| 77 | .Lfail: \ | |
| 420d6ddd RT |
78 | add sp, sp, #12; \ |
| 79 | cfi_adjust_cfa_offset (-12); \ | |
| 55668624 | 80 | pop { r7 }; \ |
| 420d6ddd RT |
81 | cfi_adjust_cfa_offset (-4); \ |
| 82 | cfi_restore (r7); \ | |
| ef889ffe | 83 | CALL_FAIL \ |
| 01b32e73 | 84 | cfi_restore_state; \ |
| 53df8bce JM |
85 | .Lok2: \ |
| 86 | mov r0, r5; \ | |
| 01b32e73 | 87 | cfi_restore_state; \ |
| ef889ffe JM |
88 | .Lok: |
| 89 | ||
| 90 | #include <__longjmp.S> |