2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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30 #if defined(LIBC_SCCS) && !defined(lint)
31 /* .asciz "@(#)setjmp.s 8.1 (Berkeley) 6/4/93" */
32 .asciz "$NetBSD: setjmp.S,v 1.7 2005/05/03 04:37:33 matt Exp $"
33 #endif /* LIBC_SCCS and not lint */
36 * C library -- setjmp, longjmp
39 * will generate a "return(v)" from
42 * by restoring registers from the stack,
43 * and a struct sigcontext, see <signal.h>
50 movl 4(%ap),%r6 # construct sigcontext
51 subl2 $12,%sp # space for current struct sigstack
52 pushl %sp # get current values
53 pushl $0 # no new values
54 calls $4,_C_LABEL(__sigaltstack14) # pop args plus signal stack value
55 movl (%sp)+,(%r6)+ # save onsigstack status of caller
60 calls $3,_C_LABEL(sigprocmask)# get signal mask
61 movl (%sp),(%r6)+ # save signal mask of caller
63 moval 4(%ap)[%r0],(%r6)+ # save sp of caller
64 movl 12(%fp),(%r6)+ # save frame pointer of caller
65 movl 8(%fp),(%r6)+ # save argument pointer of caller
66 movl 16(%fp),(%r6)+ # save pc of caller
67 movpsl (%r6) # save psl of caller
73 movl 8(%ap),%r0 # return(v)
74 movl 4(%ap),%r1 # fetch buffer
78 cmpl 12(%r1),%fp # are we there yet?
82 blbc 6(%fp),1f # was %r0 saved?
85 bbc $1,6(%fp),2f # was %r1 saved?
89 ret # pop another frame
92 pushl SC13_LEN+20(%r1) # here we fake a sigcontext
93 pushl SC13_LEN+16(%r1) # from a sigcontext13
94 pushl SC13_LEN+12(%r1)
95 pushl SC13_LEN+8(%r1) # first do save registers
98 pushl $0 # fill out the sigset
102 pushl SC13_PS(%r1) # now do everything else
108 pushl SC13_ONSTACK(%r1)
110 pushl %r0 # the return value
111 pushl %r1 # the sigcontext
112 calls $2,_C_LABEL(__longjmp14)
114 calls $0,_C_LABEL(longjmperror)