1 /* $NetBSD: setjmp.S,v 1.10 2013/09/12 15:36:16 joerg Exp $ */
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This software was developed by the Computer Systems Engineering group
8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
9 * contributed to Berkeley.
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
35 * from: Header: setjmp.s,v 1.2 92/06/25 03:18:43 torek Exp
39 #include <machine/asm.h>
40 #include <machine/frame.h>
41 #if defined(LIBC_SCCS) && !defined(lint)
43 .asciz "@(#)setjmp.s 8.1 (Berkeley) 6/4/93"
45 RCSID("$NetBSD: setjmp.S,v 1.10 2013/09/12 15:36:16 joerg Exp $")
47 #endif /* LIBC_SCCS and not lint */
53 * will generate a "return(v)" from
56 * by restoring registers from the stack,
57 * and a struct sigcontext, see <signal.h>
67 save %sp, -CC64FSZ, %sp
69 /* save globals into locals */
79 PIC_PROLOGUE(%i1, %o4)
82 /* now get sigmask and onstack flag */
83 add %i0, 0x38, %o2 /* build sigcontext in [%o2]->sc.sc_mask */
84 mov 1, %o0 /* SIG_BLOCK */
85 /* sigprocmask(SIG_BLOCK, (sigset_t *)NULL, (sigset_t *)a) */
87 set _C_LABEL(__sigprocmask14), %o4
90 #elif __PIC__ - 0 >= 1
91 ldx [%i1 + _C_LABEL(__sigprocmask14)], %g2
94 call _C_LABEL(__sigprocmask14)
98 clr %o0 /* sigstack(NULL, &foo) */
100 set _C_LABEL(__sigaltstack14), %o4
103 #elif __PIC__ - 0 >= 1
104 ldx [%i1 + _C_LABEL(__sigaltstack14)], %g2
107 call _C_LABEL(__sigaltstack14)
109 add %i0, 8, %o1 /* (foo being part of the sigcontext we're overwriting) */
111 lduw [%i0 + 8 + 0x10], %o0 /* foo.ss_flags */
112 and %o0, 1, %o1 /* onstack = foo.ss_flags & SS_ONSTACK; */
113 st %o1, [%i0 + 0x00] /* sc.sc_onstack = current onstack; */
115 /* store essential state */
116 stx %fp, [%i0 + 0x08] /* sc.sc_sp = sp */
118 stx %o0, [%i0 + 0x10] /* sc.sc_pc = return_pc */
119 stx %g0, [%i0 + 0x20] /* sc.sc_tstate = (clean ccr) */
120 stx %l1, [%i0 + 0x28] /* sc.sc_g1 */
121 stx %l2, [%i0 + 0x30] /* sc.sc_o0, set in longjmp, use as %g2 */
122 /* 0x38: 4x32bit */ /* sc.sc_mask was already saved above */
124 /* save additional registers needed to fill a complete mcontext */
125 stx %l3, [%i0 + 0x48] /* adjust asserts in longjmp.c */
126 stx %l6, [%i0 + 0x50] /* if you change any of these */
127 stx %l7, [%i0 + 0x58] /* offsets! */