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
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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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26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #if defined(LIBC_SCCS) && !defined(lint)
31 /* .asciz "@(#)setjmp.s 8.1 (Berkeley) 6/4/93" */
32 .asciz "$NetBSD: __setjmp14.S,v 1.9 2004/03/21 18:19:52 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),%r2 # 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 4(%ap),%r2 # construct sigcontext
56 movl (%sp)+,(%r2) # save onsigstack status of caller
60 calls $3,_C_LABEL(__sigprocmask14) # get signal mask
61 addl3 $8,4(%ap),%r2 # point to sp in signal context
62 clrl %r0 # assume no stack arguments
63 bbc $13,6(%fp),1f # handle callg
64 addl3 $1,(%ap),%r0 # get argument count +1 if calls
65 1: moval 24(%fp)[%r0],(%r2)+ # save sp of caller
66 movl 12(%fp),(%r2)+ # save frame pointer of caller
67 movl 8(%fp),(%r2)+ # save argument pointer of caller
68 movl 16(%fp),(%r2)+ # save pc of caller
69 movpsl (%r2) # save current psl
70 movw 4(%fp),(%r2) # save psw of caller
72 addl3 $SC_LEN,4(%ap),%r2 # point to past signal context
73 movq %r6,(%r2)+ # save r6/r7
74 movq %r8,(%r2)+ # save r8/r9
75 movq %r10,(%r2)+ # save r10/r11
82 movl 8(%ap),%r0 # return(v)
83 movl 4(%ap),%r1 # fetch buffer
84 tstl 12(%r1) # is fp non-null?
88 moval $SC_LEN(%r1),%r2 # get ptr to saved registers
89 movq (%r2)+,%r6 # restore r6/r7
90 movq (%r2)+,%r8 # restore r8/r9
91 movq (%r2)+,%r10 # restore r10/r11
94 cmpl 12(%r1),%fp # are we there yet?
98 blbc 6(%fp),1f # was %r0 saved?
101 bbc $1,6(%fp),2f # was %r1 saved?
105 ret # pop another frame
108 #endif /* !__ELF__ */
109 pushl %r1 # pointer to sigcontext
110 calls $1,_C_LABEL(__sigreturn14) # restore previous context
111 # we should never return
113 calls $0,_C_LABEL(longjmperror)