Annotation of prex-old/usr/arch/i386/setjmp.S, Revision 1.1
1.1 ! nbrk 1: /*-
! 2: * Copyright (c) 1990, 1993
! 3: * The Regents of the University of California. All rights reserved.
! 4: *
! 5: * This code is derived from software contributed to Berkeley by
! 6: * William Jolitz.
! 7: *
! 8: * Redistribution and use in source and binary forms, with or without
! 9: * modification, are permitted provided that the following conditions
! 10: * are met:
! 11: * 1. Redistributions of source code must retain the above copyright
! 12: * notice, this list of conditions and the following disclaimer.
! 13: * 2. Redistributions in binary form must reproduce the above copyright
! 14: * notice, this list of conditions and the following disclaimer in the
! 15: * documentation and/or other materials provided with the distribution.
! 16: * 3. Neither the name of the University nor the names of its contributors
! 17: * may be used to endorse or promote products derived from this software
! 18: * without specific prior written permission.
! 19: *
! 20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 30: * SUCH DAMAGE.
! 31: */
! 32:
! 33: /*
! 34: * C library -- _setjmp, _longjmp
! 35: *
! 36: * longjmp(a,v)
! 37: * will generate a "return(v)" from the last call to
! 38: * setjmp(a)
! 39: * by restoring registers from the stack.
! 40: * The previous signal state is restored.
! 41: */
! 42:
! 43: /* #include "DEFS.h" */
! 44: #include <machine/asm.h>
! 45:
! 46: ENTRY(setjmp)
! 47: pushl $0
! 48: call sigblock
! 49: popl %edx
! 50: movl 4(%esp),%ecx
! 51: movl 0(%esp),%edx
! 52: movl %edx, 0(%ecx)
! 53: movl %ebx, 4(%ecx)
! 54: movl %esp, 8(%ecx)
! 55: movl %ebp,12(%ecx)
! 56: movl %esi,16(%ecx)
! 57: movl %edi,20(%ecx)
! 58: movl %eax,24(%ecx)
! 59: movl $0,%eax
! 60: ret
! 61:
! 62: ENTRY(longjmp)
! 63: movl 4(%esp),%edx
! 64: pushl 24(%edx)
! 65: call sigsetmask
! 66: popl %eax
! 67: movl 4(%esp),%edx
! 68: movl 8(%esp),%eax
! 69: movl 0(%edx),%ecx
! 70: movl 4(%edx),%ebx
! 71: movl 8(%edx),%esp
! 72: movl 12(%edx),%ebp
! 73: movl 16(%edx),%esi
! 74: movl 20(%edx),%edi
! 75: cmpl $0,%eax
! 76: jne 1f
! 77: movl $1,%eax
! 78: 1: movl %ecx,0(%esp)
! 79: ret
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