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Annotation of 43BSDReno/lib/libc/i386/gen/setjmp.s, revision 1.1

1.1     ! root        1: /*-
        !             2:  * Copyright (c) 1990 The Regents of the University of California.
        !             3:  * 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 are permitted
        !             9:  * provided that: (1) source distributions retain this entire copyright
        !            10:  * notice and comment, and (2) distributions including binaries display
        !            11:  * the following acknowledgement:  ``This product includes software
        !            12:  * developed by the University of California, Berkeley and its contributors''
        !            13:  * in the documentation or other materials provided with the distribution
        !            14:  * and in all advertising materials mentioning features or use of this
        !            15:  * software. Neither the name of the University nor the names of its
        !            16:  * contributors may be used to endorse or promote products derived
        !            17:  * from this software without specific prior written permission.
        !            18:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            19:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            20:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            21:  */
        !            22: 
        !            23: #if defined(LIBC_SCCS) && !defined(lint)
        !            24:        .asciz "@(#)setjmp.s    5.1 (Berkeley) 4/23/90"
        !            25: #endif /* LIBC_SCCS and not lint */
        !            26: 
        !            27: /*
        !            28:  * C library -- _setjmp, _longjmp
        !            29:  *
        !            30:  *     longjmp(a,v)
        !            31:  * will generate a "return(v)" from the last call to
        !            32:  *     setjmp(a)
        !            33:  * by restoring registers from the stack.
        !            34:  * The previous signal state is restored.
        !            35:  */
        !            36: 
        !            37: #include "DEFS.h"
        !            38: 
        !            39: ENTRY(setjmp)
        !            40:        pushl   $0
        !            41:        call    _sigblock
        !            42:        popl    %edx
        !            43:        movl    4(%esp),%ecx 
        !            44:        movl    0(%esp),%edx
        !            45:        movl    %edx, 0(%ecx)
        !            46:        movl    %ebx, 4(%ecx)
        !            47:        movl    %esp, 8(%ecx)
        !            48:        movl    %ebp,12(%ecx)
        !            49:        movl    %esi,16(%ecx)
        !            50:        movl    %edi,20(%ecx)
        !            51:        movl    %eax,24(%ecx)
        !            52:        movl    $0,%eax
        !            53:        ret
        !            54: 
        !            55: ENTRY(longjmp)
        !            56:        movl    4(%esp),%edx
        !            57:        pushl   24(%edx)
        !            58:        call    _sigsetmask
        !            59:        popl    %eax
        !            60:        movl    4(%esp),%edx
        !            61:        movl    8(%esp),%eax
        !            62:        movl    0(%edx),%ecx
        !            63:        movl    4(%edx),%ebx
        !            64:        movl    8(%edx),%esp
        !            65:        movl    12(%edx),%ebp
        !            66:        movl    16(%edx),%esi
        !            67:        movl    20(%edx),%edi
        !            68:        cmpl    $0,%eax
        !            69:        jne     1f
        !            70:        movl    $1,%eax
        !            71: 1:     movl    %ecx,0(%esp)
        !            72:        ret

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