projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 376c348c UD |
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 | |
| 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. | |
| 376c348c UD |
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 | |
| 41bdb6e2 | 13 | Lesser General Public License for more details. |
| 376c348c | 14 | |
| 41bdb6e2 AJ |
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. */ | |
| 376c348c UD |
19 | |
| 20 | #include <sysdep.h> | |
| 21 | #define _ASM | |
| 22 | #define _SETJMP_H | |
| 23 | #include <bits/setjmp.h> | |
| 24 | #include "bp-sym.h" | |
| 25 | #include "bp-asm.h" | |
| 26 | ||
| 27 | #define PARMS LINKAGE /* no space for saved regs */ | |
| 28 | #define JMPBUF PARMS | |
| 29 | #define SIGMSK JMPBUF+PTR_SIZE | |
| 30 | ||
| 31 | ENTRY (BP_SYM (setjmp)) | |
| 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. */ | |
| 35 | ENTER | |
| 36 | ||
| 37 | movl JMPBUF(%esp), %eax | |
| 38 | CHECK_BOUNDS_BOTH_WIDE (%eax, JMPBUF(%esp), $JB_SIZE) | |
| 39 | ||
| 40 | /* Save registers. */ | |
| 41 | movl %ebx, (JB_BX*4)(%eax) | |
| 42 | movl %esi, (JB_SI*4)(%eax) | |
| 43 | movl %edi, (JB_DI*4)(%eax) | |
| 44 | leal JMPBUF(%esp), %ecx /* Save SP as it will be after we return. */ | |
| 45 | movl %ecx, (JB_SP*4)(%eax) | |
| 46 | movl PCOFF(%esp), %ecx /* Save PC we are returning to now. */ | |
| 47 | movl %ecx, (JB_PC*4)(%eax) | |
| 48 | LEAVE /* pop frame pointer to prepare for tail-call. */ | |
| 49 | movl %ebp, (JB_BP*4)(%eax) /* Save caller's frame pointer. */ | |
| 50 | ||
| 51 | /* Call __sigjmp_save. */ | |
| 52 | pushl $1 | |
| 53 | pushl 8(%esp) | |
| 54 | #ifdef PIC | |
| 55 | /* We cannot use the PLT, because it requires that %ebx be set, but | |
| 56 | we can't save and restore our caller's value. Instead, we do an | |
| 57 | indirect jump through the GOT, using for the temporary register | |
| 58 | %ecx, which is call-clobbered. */ | |
| 59 | call here2 | |
| 60 | here2: popl %ecx | |
| 61 | addl $_GLOBAL_OFFSET_TABLE_+[.-here2], %ecx | |
| 62 | movl C_SYMBOL_NAME (BP_SYM (__sigjmp_save)@GOT)(%ecx), %ecx | |
| 63 | call *%ecx | |
| 64 | #else | |
| 65 | call BP_SYM (__sigjmp_save) | |
| 66 | #endif | |
| 67 | popl %ecx | |
| 68 | popl %edx | |
| 69 | ret | |
| 70 | END (BP_SYM (setjmp)) |