1 /* $NetBSD: compat_setjmp.S,v 1.3 2014/03/04 06:27:00 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
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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: compat_setjmp.S,v 1.3 2014/03/04 06:27:00 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 * and a struct sigcontext, see <signal.h>
58 lea -12(%sp),%sp /* space for sigstack args/rvals */
59 clrl (%sp) /* don't change it... */
60 movl %sp,4(%sp) /* ...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 8(%sp),%d1 /* old flags value */
66 andl #1,%d1 /* extract onstack flag */
68 movl 4(%sp),%a0 /* save area pointer */
69 movl %d1,(%a0)+ /* save old onstack value */
70 movl %d0,(%a0)+ /* save old signal mask */
71 lea 4(%sp),%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 */
83 movl 4(%sp),%a0 /* save area pointer */
84 tstl 8(%a0) /* ensure non-zero SP */
86 movl 8(%sp),%d0 /* grab return value */
87 jne ok /* non-zero ok */
88 moveq #1,%d0 /* else make non-zero */
90 moveml 28(%a0),#0x3CFC /* restore non-scratch regs */
91 movl %a0,-(%sp) /* let sigreturn */
92 trap #1 /* finish via compat_13_sigreturn13() */
95 jbsr PIC_PLT(_C_LABEL(longjmperror))