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59 lines
2.1 KiB
ArmAsm
59 lines
2.1 KiB
ArmAsm
/* BSD `setjmp' entry point to `sigsetjmp (..., 1)'. i386 version.
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Copyright (C) 1994,1995,1996,1997,2000,2001 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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/* This just does a tail-call to `__sigsetjmp (ARG, 1)'.
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We cannot do it in C because it must be a tail-call, so frame-unwinding
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in setjmp doesn't clobber the state restored by longjmp. */
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#include <sysdep.h>
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#define _ASM
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#define _SETJMP_H
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#include <bits/setjmp.h>
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#include "bp-sym.h"
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#include "bp-asm.h"
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ENTRY (BP_SYM (setjmp))
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/* Note that we have to use a non-exported symbol in the next
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jump since otherwise gas will emit it as a jump through the
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PLT which is what we cannot use here. */
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ENTER
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movl JMPBUF(%esp), %eax
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CHECK_BOUNDS_BOTH_WIDE (%eax, JMPBUF(%esp), $JB_SIZE)
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/* Save registers. */
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movl %ebx, (JB_BX*4)(%eax)
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movl %esi, (JB_SI*4)(%eax)
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movl %edi, (JB_DI*4)(%eax)
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leal JMPBUF(%esp), %ecx /* Save SP as it will be after we return. */
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movl %ecx, (JB_SP*4)(%eax)
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movl PCOFF(%esp), %ecx /* Save PC we are returning to now. */
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movl %ecx, (JB_PC*4)(%eax)
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LEAVE /* pop frame pointer to prepare for tail-call. */
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movl %ebp, (JB_BP*4)(%eax) /* Save caller's frame pointer. */
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/* Call __sigjmp_save. */
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pushl $1
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pushl 8(%esp)
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call BP_SYM (__sigjmp_save)
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popl %ecx
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popl %edx
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ret
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END (BP_SYM (setjmp))
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