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Annotation of 43BSDReno/lib/libc/i386/gen/setjmp.s, revision 1.1.1.1

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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