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Annotation of sys/lib/libkern/arch/i386/setjmp.S, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: setjmp.S,v 1.3 2003/06/02 23:28:08 millert Exp $      */
        !             2: /*     $NetBSD: setjmp.S,v 1.5 1994/10/26 06:39:14 cgd Exp $   */
        !             3:
        !             4: /*-
        !             5:  * Copyright (c) 1990 The Regents of the University of California.
        !             6:  * All rights reserved.
        !             7:  *
        !             8:  * This code is derived from software contributed to Berkeley by
        !             9:  * William Jolitz.
        !            10:  *
        !            11:  * Redistribution and use in source and binary forms, with or without
        !            12:  * modification, are permitted provided that the following conditions
        !            13:  * are met:
        !            14:  * 1. Redistributions of source code must retain the above copyright
        !            15:  *    notice, this list of conditions and the following disclaimer.
        !            16:  * 2. Redistributions in binary form must reproduce the above copyright
        !            17:  *    notice, this list of conditions and the following disclaimer in the
        !            18:  *    documentation and/or other materials provided with the distribution.
        !            19:  * 3. Neither the name of the University nor the names of its contributors
        !            20:  *    may be used to endorse or promote products derived from this software
        !            21:  *    without specific prior written permission.
        !            22:  *
        !            23:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            24:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            25:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            26:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            27:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            28:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            29:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            30:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            31:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            32:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            33:  * SUCH DAMAGE.
        !            34:  *
        !            35:  *     @(#)setjmp.s    5.1 (Berkeley) 4/23/90
        !            36:  */
        !            37:
        !            38: /*
        !            39:  * C library -- _setjmp, _longjmp
        !            40:  *
        !            41:  *     longjmp(a,v)
        !            42:  * will generate a "return(v)" from the last call to
        !            43:  *     setjmp(a)
        !            44:  * by restoring registers from the stack.
        !            45:  * The previous signal state is restored.
        !            46:  */
        !            47:
        !            48: #include "DEFS.h"
        !            49: #include "SYS.h"
        !            50:
        !            51: ENTRY(setjmp)
        !            52:        pushl   $0
        !            53:        call    PIC_PLT(_sigblock)
        !            54:        popl    %edx
        !            55:        movl    4(%esp),%ecx
        !            56:        movl    0(%esp),%edx
        !            57:        movl    %edx, 0(%ecx)
        !            58:        movl    %ebx, 4(%ecx)
        !            59:        movl    %esp, 8(%ecx)
        !            60:        movl    %ebp,12(%ecx)
        !            61:        movl    %esi,16(%ecx)
        !            62:        movl    %edi,20(%ecx)
        !            63:        movl    %eax,24(%ecx)
        !            64:        xorl    %eax,%eax
        !            65:        ret
        !            66:
        !            67: ENTRY(longjmp)
        !            68:        movl    4(%esp),%edx
        !            69:        pushl   24(%edx)
        !            70:        call    PIC_PLT(_sigsetmask)
        !            71:        popl    %eax
        !            72:        movl    4(%esp),%edx
        !            73:        movl    8(%esp),%eax
        !            74:        movl    0(%edx),%ecx
        !            75:        movl    4(%edx),%ebx
        !            76:        movl    8(%edx),%esp
        !            77:        movl    12(%edx),%ebp
        !            78:        movl    16(%edx),%esi
        !            79:        movl    20(%edx),%edi
        !            80:        testl   %eax,%eax
        !            81:        jnz     1f
        !            82:        incl    %eax
        !            83: 1:     movl    %ecx,0(%esp)
        !            84:        ret