glibc/sysdeps/i386/elf/bsd-setjmp.S
Ulrich Drepper 376c348c91 Update.
* sysdeps/i386/elf/bsd-setjmp.S: Real implementation.
	* sysdeps/i386/elf/bsd-_setjmp.S: Removed.
	* sysdeps/i386/elf/setjmp.S (setjmp): Removed here.
	* sysdeps/i386/bsd-_setjmp.S: Real implementation.
	* sysdeps/i386/bsd-setjmp.S: Real implementation.
	* sysdeps/i386/bits/setjmp.h: Remove PUSH_SIGNAL_MASK definition.
	* sysdeps/i386/setjmp.S: Remove PIC support.  This is the non-ELF
	version.
	* stdio-common/tstscanf.c (main): Add two testcases for '*' modifier.
2001-01-16 23:37:51 +00:00

71 lines
2.4 KiB
ArmAsm

/* BSD `setjmp' entry point to `sigsetjmp (..., 1)'. i386 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.
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.
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. */
#include <sysdep.h>
#define _ASM
#define _SETJMP_H
#include <bits/setjmp.h>
#include "bp-sym.h"
#include "bp-asm.h"
#define PARMS LINKAGE /* no space for saved regs */
#define JMPBUF PARMS
#define SIGMSK JMPBUF+PTR_SIZE
ENTRY (BP_SYM (setjmp))
/* Note that we have to use a non-exported symbol in the next
jump since otherwise gas will emit it as a jump through the
PLT which is what we cannot use here. */
ENTER
movl JMPBUF(%esp), %eax
CHECK_BOUNDS_BOTH_WIDE (%eax, JMPBUF(%esp), $JB_SIZE)
/* Save registers. */
movl %ebx, (JB_BX*4)(%eax)
movl %esi, (JB_SI*4)(%eax)
movl %edi, (JB_DI*4)(%eax)
leal JMPBUF(%esp), %ecx /* Save SP as it will be after we return. */
movl %ecx, (JB_SP*4)(%eax)
movl PCOFF(%esp), %ecx /* Save PC we are returning to now. */
movl %ecx, (JB_PC*4)(%eax)
LEAVE /* pop frame pointer to prepare for tail-call. */
movl %ebp, (JB_BP*4)(%eax) /* Save caller's frame pointer. */
/* Call __sigjmp_save. */
pushl $1
pushl 8(%esp)
#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 here2
here2: popl %ecx
addl $_GLOBAL_OFFSET_TABLE_+[.-here2], %ecx
movl C_SYMBOL_NAME (BP_SYM (__sigjmp_save)@GOT)(%ecx), %ecx
call *%ecx
#else
call BP_SYM (__sigjmp_save)
#endif
popl %ecx
popl %edx
ret
END (BP_SYM (setjmp))