diff options
Diffstat (limited to 'libc/sysdeps/linux/i386/setjmp.S')
| -rw-r--r-- | libc/sysdeps/linux/i386/setjmp.S | 79 |
1 files changed, 33 insertions, 46 deletions
diff --git a/libc/sysdeps/linux/i386/setjmp.S b/libc/sysdeps/linux/i386/setjmp.S index d38437b6b..debef7017 100644 --- a/libc/sysdeps/linux/i386/setjmp.S +++ b/libc/sysdeps/linux/i386/setjmp.S @@ -1,72 +1,59 @@ -/* setjmp for i386. - Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc. +/* setjmp for i386, ELF version. + Copyright (C) 1995, 1996, 1997, 2000, 2001 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. + Lesser General Public License for more details. - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ #define _ASM #define _SETJMP_H #include <bits/setjmp.h> + .globl __sigsetjmp; -.type __sigsetjmp,@function -.align 4; \ +.type __sigsetjmp,@function +.align 4; + __sigsetjmp: - movl 4(%esp), %eax /* User's jmp_buf in %eax. */ + movl 4 (%esp), %eax /* Save registers. */ - movl %ebx, (JB_BX*4)(%eax) - movl %esi, (JB_SI*4)(%eax) - movl %edi, (JB_DI*4)(%eax) - movl %ebp, (JB_BP*4)(%eax) - leal 4(%esp), %ecx /* Save SP as it will be after we return. */ - movl %ecx, (JB_SP*4)(%eax) - movl 0(%esp), %ecx /* Save PC we are returning to now. */ - movl %ecx, (JB_PC*4)(%eax) - - pushl 0x8(%esp) /* save mask */ - pushl 0x8(%esp) /* jump buf */ + movl %ebx, (0 *4)(%eax) + movl %esi, (1 *4)(%eax) + movl %edi, (2 *4)(%eax) + /* Save SP as it will be after we return. */ + leal 4(%esp), %ecx + movl %ecx, (4 *4)(%eax) + /* Save PC we are returning to now. */ + movl 0(%esp), %ecx + movl %ecx, (5 *4)(%eax) + /* Save caller's frame pointer. */ + movl %ebp, (3 *4)(%eax) /* Make a tail call to __sigjmp_save; it takes the same args. */ -#if defined(PIC) +#ifdef PIC /* We cannot use the PLT, because it requires that %ebx be set, but we can't save and restore our caller's value. Instead, we do an indirect jump through the GOT, using for the temporary register %ecx, which is call-clobbered. */ - call Lhere -Lhere: + call .Lhere +.Lhere: popl %ecx - addl $_GLOBAL_OFFSET_TABLE_+[.-Lhere], %ecx - movl (__sigjmp_save)(%ecx), %ecx - call *%ecx + addl $_GLOBAL_OFFSET_TABLE_+[.- .Lhere ], %ecx + movl __sigjmp_save @GOT (%ecx), %ecx + jmp *%ecx #else - call __sigjmp_save + jmp __sigjmp_save #endif - - add $8, %esp - ret .size __sigsetjmp,.-__sigsetjmp; - -.globl _setjmp; -.type _setjmp,@function -.align 4; \ -_setjmp: - pushl $0 /* Push zero argument. */ - pushl 0x8(%esp) /* Push jmp_buf. */ - call __sigsetjmp - add $8, %esp - ret -.size _setjmp,.-_setjmp; - |