1 /* $NetBSD: setjmp.S,v 1.11 2003/08/07 16:42:11 agc 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 1.11 2003/08/07 16:42:11 agc 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 * and a struct sigcontext, see <signal.h>
58 lea %sp@(-12),%sp /* space for sigstack args/rvals */
59 clrl %sp@ /* don't change it... */
60 movl %sp,%sp@(4) /* ...but return the current val */
61 jbsr PIC_PLT(_C_LABEL(__sigaltstack14))
62 /* note: flags returned in sp@(8) */
63 clrl %sp@ /* don't change mask, just return */
64 jbsr PIC_PLT(_C_LABEL(sigblock)) /* old value */
65 movl %sp@(8),%d1 /* old flags value */
66 andl #1,%d1 /* extract onstack flag */
68 movl %sp@(4),%a0 /* save area pointer */
69 movl %d1,%a0@+ /* save old onstack value */
70 movl %d0,%a0@+ /* save old signal mask */
71 lea %sp@(4),%a1 /* adjust saved SP since we won't rts */
72 movl %a1,%a0@+ /* save old SP */
73 movl %a6,%a0@+ /* save old FP */
74 clrl %a0@+ /* no AP */
75 movl %sp@,%a0@+ /* save old PC */
76 clrl %a0@+ /* clean PS */
77 moveml #0x3CFC,%a0@ /* save remaining non-scratch regs */
78 clrl %d0 /* return 0 */
82 movl %sp@(4),%a0 /* save area pointer */
83 tstl %a0@(8) /* ensure non-zero SP */
85 movl %sp@(8),%d0 /* grab return value */
86 jne ok /* non-zero ok */
87 moveq #1,%d0 /* else make non-zero */
89 moveml %a0@(28),#0x3CFC /* restore non-scratch regs */
90 movl %a0,%sp@- /* let sigreturn */
91 jbsr PIC_PLT(_C_LABEL(sigreturn)) /* finish for us */
94 jbsr PIC_PLT(_C_LABEL(longjmperror))