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28f540f4 | 1 | /* BSD `setjmp' entry point to `sigsetjmp (..., 1)'. i386 version. |
b168057a | 2 | Copyright (C) 1994-2015 Free Software Foundation, Inc. |
c57abfa7 | 3 | This file is part of the GNU C Library. |
28f540f4 | 4 | |
c57abfa7 | 5 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
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. | |
28f540f4 | 9 | |
c57abfa7 UD |
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 | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
28f540f4 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
28f540f4 RM |
18 | |
19 | /* This just does a tail-call to `__sigsetjmp (ARG, 1)'. | |
20 | We cannot do it in C because it must be a tail-call, so frame-unwinding | |
21 | in setjmp doesn't clobber the state restored by longjmp. */ | |
22 | ||
23 | #include <sysdep.h> | |
a7140723 | 24 | #include <jmpbuf-offsets.h> |
8422c9a5 | 25 | #include <stap-probe.h> |
28f540f4 | 26 | |
2366713d | 27 | #define PARMS 4 /* no space for saved regs */ |
827b7087 | 28 | #define JMPBUF PARMS |
2366713d | 29 | #define SIGMSK JMPBUF+4 |
827b7087 | 30 | |
2366713d | 31 | ENTRY (setjmp) |
376c348c UD |
32 | /* Note that we have to use a non-exported symbol in the next |
33 | jump since otherwise gas will emit it as a jump through the | |
34 | PLT which is what we cannot use here. */ | |
376c348c UD |
35 | |
36 | movl JMPBUF(%esp), %eax | |
376c348c | 37 | |
350635a5 | 38 | /* Save registers. */ |
376c348c UD |
39 | movl %ebx, (JB_BX*4)(%eax) |
40 | movl %esi, (JB_SI*4)(%eax) | |
41 | movl %edi, (JB_DI*4)(%eax) | |
42 | leal JMPBUF(%esp), %ecx /* Save SP as it will be after we return. */ | |
272b2898 UD |
43 | #ifdef PTR_MANGLE |
44 | PTR_MANGLE (%ecx) | |
45 | #endif | |
350635a5 | 46 | movl %ecx, (JB_SP*4)(%eax) |
2366713d | 47 | movl 0(%esp), %ecx /* Save PC we are returning to now. */ |
8422c9a5 | 48 | LIBC_PROBE (setjmp, 3, 4@%eax, -4@$1, 4@%ecx) |
827b7087 UD |
49 | #ifdef PTR_MANGLE |
50 | PTR_MANGLE (%ecx) | |
51 | #endif | |
350635a5 | 52 | movl %ecx, (JB_PC*4)(%eax) |
376c348c UD |
53 | movl %ebp, (JB_BP*4)(%eax) /* Save caller's frame pointer. */ |
54 | ||
55 | /* Call __sigjmp_save. */ | |
56 | pushl $1 | |
1ad9da69 | 57 | cfi_adjust_cfa_offset (4) |
376c348c | 58 | pushl 8(%esp) |
1ad9da69 | 59 | cfi_adjust_cfa_offset (4) |
2366713d | 60 | call __sigjmp_save |
376c348c | 61 | popl %ecx |
1ad9da69 | 62 | cfi_adjust_cfa_offset (-4) |
376c348c | 63 | popl %edx |
1ad9da69 | 64 | cfi_adjust_cfa_offset (-4) |
376c348c | 65 | ret |
2366713d | 66 | END (setjmp) |