1 /* $NetBSD: _setjmp.S,v 1.9 2013/07/16 22:12:20 matt Exp $ */
4 * Copyright (c) 1990 The Regents of the University of California.
7 * This code is derived from software contributed to Berkeley by
8 * the Systems Programming Group of the University of Utah Computer
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
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.
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
36 #include <machine/asm.h>
38 #if defined(LIBC_SCCS) && !defined(lint)
40 RCSID("from: @(#)_setjmp.s 5.1 (Berkeley) 5/12/90")
42 RCSID("$NetBSD: _setjmp.S,v 1.9 2013/07/16 22:12:20 matt Exp $")
44 #endif /* LIBC_SCCS and not lint */
47 * C library -- _setjmp, _longjmp
50 * will generate a "return(v)" from
53 * by restoring registers from the stack,
54 * The previous signal state is NOT restored.
58 movl 4(%sp),%a0 /* save area pointer */
59 clrl (%a0)+ /* no old onstack */
60 clrl (%a0)+ /* no old sigmask */
61 movl %sp,(%a0)+ /* save old SP */
62 movl %a6,(%a0)+ /* save old FP */
63 clrl (%a0)+ /* no old AP */
64 movl (%sp),(%a0)+ /* save old PC */
65 clrl (%a0)+ /* clear PS */
66 moveml #0x3CFC,(%a0) /* save other non-scratch regs */
67 clrl %d0 /* return zero */
72 movl 4(%sp),%a0 /* save area pointer */
73 addql #8,%a0 /* skip onstack/sigmask */
74 tstl (%a0) /* ensure non-zero SP */
76 movl 8(%sp),%d0 /* grab return value */
77 jne ok /* non-zero ok */
78 moveq #1,%d0 /* else make non-zero */
80 movl (%a0)+,%sp /* restore SP */
81 movl (%a0)+,%a6 /* restore FP */
82 addql #4,%a0 /* skip AP */
83 movl (%a0)+,(%sp) /* restore PC */
84 moveml 4(%a0),#0x3CFC /* restore non-scratch regs */
88 jbsr PIC_PLT(_C_LABEL(longjmperror))