| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame^] | 1 | /* BSD `setjmp' entry point to `sigsetjmp (..., 1)'. i386 version. |
| 2 | Copyright (C) 1995, 1996, 1997, 2000, 2001 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, write to the Free |
| 17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 18 | 02111-1307 USA. */ |
| 19 | |
| 20 | #define _ASM |
| 21 | #define _SETJMP_H |
| 22 | #include <bits/setjmp.h> |
| 23 | |
| 24 | .global setjmp |
| 25 | .type setjmp,%function |
| 26 | setjmp: |
| 27 | movl 4 (%esp), %eax |
| 28 | /* Save registers. */ |
| 29 | movl %ebx, (0 *4)(%eax) |
| 30 | movl %esi, (1 *4)(%eax) |
| 31 | movl %edi, (2 *4)(%eax) |
| 32 | /* Save SP as it will be after we return. */ |
| 33 | leal 4 (%esp), %ecx |
| 34 | movl %ecx, (4 *4)(%eax) |
| 35 | /* Save PC we are returning to now. */ |
| 36 | movl 0 (%esp), %ecx |
| 37 | movl %ecx, (5 *4)(%eax) |
| 38 | /* Save caller's frame pointer. */ |
| 39 | movl %ebp, (3 *4)(%eax) |
| 40 | |
| 41 | /* Call __sigjmp_save. */ |
| 42 | pushl $1 |
| 43 | pushl 8(%esp) |
| 44 | #ifdef __PIC__ |
| 45 | /* We cannot use the PLT, because it requires that %ebx be set, but |
| 46 | we can't save and restore our caller's value. Instead, we do an |
| 47 | indirect jump through the GOT, using for the temporary register |
| 48 | %ecx, which is call-clobbered. */ |
| 49 | call here2 |
| 50 | here2: popl %ecx |
| 51 | addl $_GLOBAL_OFFSET_TABLE_+[.-here2], %ecx |
| 52 | movl __sigjmp_save @GOT (%ecx), %ecx |
| 53 | call *%ecx |
| 54 | #else |
| 55 | call __sigjmp_save |
| 56 | #endif |
| 57 | popl %ecx |
| 58 | popl %edx |
| 59 | ret |
| 60 | .size setjmp,.-setjmp |