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59 lines
1.9 KiB
ArmAsm
59 lines
1.9 KiB
ArmAsm
.file "setjmp.S"
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/*
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* Copyright (C) 1998, 1999, Jonathan S. Shapiro.
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*
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* This file is part of the EROS Operating System.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2,
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* or (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/* #include <eros/i486/asm.h> */
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/*
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* typedef struct {
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* unsigned long ebx, esi, edi;
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* unsigned long ebp;
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* unsigned long sp;
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* unsigned long pc;
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* } jmp_buf[1];
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*/
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/*
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* On entry, the stack to setjmp looks like:
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*
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* ptr to jmp_buf
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* return PC
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*/
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.globl _setjmp
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_setjmp:
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pushl %ebp
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movl %esp,%ebp
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movl 0x8(%ebp),%eax /* address of jmp_buf to eax */
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movl %ebx,(%eax) /* save %ebx */
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movl %esi,4(%eax) /* save %esi */
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movl %edi,8(%eax) /* save %edi */
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leal 8(%ebp),%edx /* calling proc's esp, not ours! */
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movl %edx,16(%eax)
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movl 4(%ebp), %edx /* save return PC */
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movl %edx,20(%eax)
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movl 0(%ebp),%edx /* calling proc's ebp, not ours! */
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movl %edx,12(%eax)
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xorl %eax,%eax /* return 0 the first time */
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leave
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ret
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