1 /* $NetBSD: _setjmp.S,v 1.10 2014/07/12 19:11:57 nakayama Exp $ */
4 * Copyright (c) 1999 The NetBSD Foundation, Inc.
7 * This code is derived from software contributed to The NetBSD Foundation
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
32 #include <machine/asm.h>
33 #include <machine/trap.h>
35 #if defined(LIBC_SCCS) && !defined(lint)
36 RCSID("$NetBSD: _setjmp.S,v 1.10 2014/07/12 19:11:57 nakayama Exp $")
37 #endif /* LIBC_SCCS and not lint */
40 * C library -- _setjmp, _longjmp
43 * will generate a "return(v?v:1)" from
46 * The previous signal state is NOT restored.
50 /* store important globals, sigsetjmp compatible */
56 st %sp, [%o0+0] /* store caller's stack pointer */
57 st %o7, [%o0+4] /* and the return pc */
66 * We restore the saved stack pointer to %fp, then issue
67 * a `restore' instruction which will reload the register
68 * window from the stack.
74 ld [%i0 + 4], %i7 /* restore return pc */
75 ld [%i0 + 0], %fp /* and stack pointer */
77 movrnz %i1, %i1, %i0 ! compute v ? v : 1
81 save %sp, -64, %sp ! set up a local stack frame
82 tst %i1 ! compute v ? v : 1
86 t ST_FLUSHWIN ! flush register windows out to the stack
95 * We restore the saved stack pointer to %fp, then issue
96 * a `restore' instruction which will reload the register
97 * window from the stack.
99 ld [%i0+4], %i7 /* restore return pc */
100 ld [%i0+0], %fp /* and stack pointer */
102 ret ! success, return %i1