xref: /onnv-gate/usr/src/lib/libbc/libc/sys/common/sigsetjmp.c (revision 0:68f95e015346)
1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate  * CDDL HEADER START
3*0Sstevel@tonic-gate  *
4*0Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*0Sstevel@tonic-gate  * with the License.
8*0Sstevel@tonic-gate  *
9*0Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate  * and limitations under the License.
13*0Sstevel@tonic-gate  *
14*0Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate  *
20*0Sstevel@tonic-gate  * CDDL HEADER END
21*0Sstevel@tonic-gate  */
22*0Sstevel@tonic-gate /*	Copyright (c) 1988 AT&T */
23*0Sstevel@tonic-gate /*	All Rights Reserved   */
24*0Sstevel@tonic-gate 
25*0Sstevel@tonic-gate 
26*0Sstevel@tonic-gate /*
27*0Sstevel@tonic-gate  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
28*0Sstevel@tonic-gate  * Use is subject to license terms.
29*0Sstevel@tonic-gate  */
30*0Sstevel@tonic-gate 
31*0Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
32*0Sstevel@tonic-gate 
33*0Sstevel@tonic-gate 
34*0Sstevel@tonic-gate #include <sys/setjmp.h>
35*0Sstevel@tonic-gate #include "ucontext.h"
36*0Sstevel@tonic-gate 
37*0Sstevel@tonic-gate int _getsp();
38*0Sstevel@tonic-gate 
39*0Sstevel@tonic-gate int
sigsetjmp(env,savemask)40*0Sstevel@tonic-gate sigsetjmp(env, savemask)
41*0Sstevel@tonic-gate 	sigjmp_buf env;
42*0Sstevel@tonic-gate 	int savemask;
43*0Sstevel@tonic-gate {
44*0Sstevel@tonic-gate 	register o_setjmp_struct_t *bp = (o_setjmp_struct_t *)env;
45*0Sstevel@tonic-gate 	register int sp = _getsp();
46*0Sstevel@tonic-gate 	ucontext_t uc;
47*0Sstevel@tonic-gate 
48*0Sstevel@tonic-gate 	/*
49*0Sstevel@tonic-gate 	 * Get the current machine context.
50*0Sstevel@tonic-gate 	 */
51*0Sstevel@tonic-gate 	uc.uc_flags = UC_STACK | UC_SIGMASK;
52*0Sstevel@tonic-gate 	__getcontext(&uc);
53*0Sstevel@tonic-gate 
54*0Sstevel@tonic-gate 	/*
55*0Sstevel@tonic-gate 	 * Note that the pc and former sp (fp) from the stack are valid
56*0Sstevel@tonic-gate 	 * because the call to __getcontext must flush the user windows
57*0Sstevel@tonic-gate 	 * to the stack.
58*0Sstevel@tonic-gate 	 */
59*0Sstevel@tonic-gate 	bp->sjs_flags = 0;
60*0Sstevel@tonic-gate 	bp->sjs_sp    = *((int *)sp+14);
61*0Sstevel@tonic-gate 	bp->sjs_pc    = *((int *)sp+15) + 0x8;
62*0Sstevel@tonic-gate 	bp->sjs_stack = uc.uc_stack;
63*0Sstevel@tonic-gate 
64*0Sstevel@tonic-gate 	if (savemask) {
65*0Sstevel@tonic-gate 		/* save the mask */
66*0Sstevel@tonic-gate 		bp->sjs_flags |= JB_SAVEMASK;
67*0Sstevel@tonic-gate 		memcpy(bp->sjs_sigmask, &(uc.uc_sigmask), 3 * sizeof (int));
68*0Sstevel@tonic-gate 	} else {
69*0Sstevel@tonic-gate 		memset(bp->sjs_sigmask, 0, 3 * sizeof (int));
70*0Sstevel@tonic-gate 	}
71*0Sstevel@tonic-gate 
72*0Sstevel@tonic-gate 	return (0);
73*0Sstevel@tonic-gate }
74*0Sstevel@tonic-gate 
75*0Sstevel@tonic-gate 
76*0Sstevel@tonic-gate void
siglongjmp(env,val)77*0Sstevel@tonic-gate siglongjmp(env, val)
78*0Sstevel@tonic-gate 	sigjmp_buf env;
79*0Sstevel@tonic-gate 	int val;
80*0Sstevel@tonic-gate {
81*0Sstevel@tonic-gate 	o_setjmp_struct_t *bp = (o_setjmp_struct_t *)env;
82*0Sstevel@tonic-gate 	setjmp_struct_t sjmp, *sp;
83*0Sstevel@tonic-gate 
84*0Sstevel@tonic-gate 	sp = &sjmp;
85*0Sstevel@tonic-gate 	sp->sjs_flags = bp->sjs_flags;
86*0Sstevel@tonic-gate 	sp->sjs_sp = bp->sjs_sp;
87*0Sstevel@tonic-gate 	sp->sjs_pc = bp->sjs_pc;
88*0Sstevel@tonic-gate 	sp->sjs_fp = 0;
89*0Sstevel@tonic-gate 	sp->sjs_i7 = 0;
90*0Sstevel@tonic-gate 	sp->sjs_uclink = 0;
91*0Sstevel@tonic-gate 	sp->sjs_sigmask[0] = bp->sjs_sigmask[0];
92*0Sstevel@tonic-gate 	sp->sjs_sigmask[1] = bp->sjs_sigmask[1];
93*0Sstevel@tonic-gate 	sp->sjs_sigmask[2] = bp->sjs_sigmask[2];
94*0Sstevel@tonic-gate 	sp->sjs_sigmask[3] = 0;
95*0Sstevel@tonic-gate 	sp->sjs_stack = bp->sjs_stack;
96*0Sstevel@tonic-gate 
97*0Sstevel@tonic-gate 	_siglongjmp(sjmp, val);
98*0Sstevel@tonic-gate }
99*0Sstevel@tonic-gate 
100*0Sstevel@tonic-gate int
_setjmp(env)101*0Sstevel@tonic-gate _setjmp(env)
102*0Sstevel@tonic-gate 	jmp_buf env;
103*0Sstevel@tonic-gate {
104*0Sstevel@tonic-gate 	register o_setjmp_struct_t *bp = (o_setjmp_struct_t *)env;
105*0Sstevel@tonic-gate 	register int sp = _getsp();
106*0Sstevel@tonic-gate 	ucontext_t uc;
107*0Sstevel@tonic-gate 
108*0Sstevel@tonic-gate 	/*
109*0Sstevel@tonic-gate 	 * Get the current machine context.
110*0Sstevel@tonic-gate 	 */
111*0Sstevel@tonic-gate 	uc.uc_flags = UC_STACK;
112*0Sstevel@tonic-gate 	__getcontext(&uc);
113*0Sstevel@tonic-gate 
114*0Sstevel@tonic-gate 	/*
115*0Sstevel@tonic-gate 	 * Note that the pc and former sp (fp) from the stack are valid
116*0Sstevel@tonic-gate 	 * because the call to __getcontext must flush the user windows
117*0Sstevel@tonic-gate 	 * to the stack.
118*0Sstevel@tonic-gate 	 */
119*0Sstevel@tonic-gate 	bp->sjs_flags = 0;
120*0Sstevel@tonic-gate 	bp->sjs_sp    = *((int *)sp+14);
121*0Sstevel@tonic-gate 	bp->sjs_pc    = *((int *)sp+15) + 0x8;
122*0Sstevel@tonic-gate 	bp->sjs_sigmask[0] = 0;
123*0Sstevel@tonic-gate 	bp->sjs_sigmask[1] = 0;
124*0Sstevel@tonic-gate 	bp->sjs_sigmask[2] = 0;
125*0Sstevel@tonic-gate 	bp->sjs_stack = uc.uc_stack;
126*0Sstevel@tonic-gate 
127*0Sstevel@tonic-gate 	return (0);
128*0Sstevel@tonic-gate }
129*0Sstevel@tonic-gate 
130*0Sstevel@tonic-gate 
131*0Sstevel@tonic-gate void
_longjmp(env,val)132*0Sstevel@tonic-gate _longjmp(env, val)
133*0Sstevel@tonic-gate 	jmp_buf env;
134*0Sstevel@tonic-gate 	int val;
135*0Sstevel@tonic-gate {
136*0Sstevel@tonic-gate 	o_setjmp_struct_t *bp = (o_setjmp_struct_t *)env;
137*0Sstevel@tonic-gate 	setjmp_struct_t sjmp, *sp;
138*0Sstevel@tonic-gate 
139*0Sstevel@tonic-gate 	sp = &sjmp;
140*0Sstevel@tonic-gate 	sp->sjs_flags = bp->sjs_flags;
141*0Sstevel@tonic-gate 	sp->sjs_sp = bp->sjs_sp;
142*0Sstevel@tonic-gate 	sp->sjs_pc = bp->sjs_pc;
143*0Sstevel@tonic-gate 	sp->sjs_fp = 0;
144*0Sstevel@tonic-gate 	sp->sjs_i7 = 0;
145*0Sstevel@tonic-gate 	sp->sjs_uclink = 0;
146*0Sstevel@tonic-gate 	sp->sjs_sigmask[0] = bp->sjs_sigmask[0];
147*0Sstevel@tonic-gate 	sp->sjs_sigmask[1] = bp->sjs_sigmask[1];
148*0Sstevel@tonic-gate 	sp->sjs_sigmask[2] = bp->sjs_sigmask[2];
149*0Sstevel@tonic-gate 	sp->sjs_sigmask[3] = 0;
150*0Sstevel@tonic-gate 	sp->sjs_stack = bp->sjs_stack;
151*0Sstevel@tonic-gate 
152*0Sstevel@tonic-gate 	_siglongjmp(sjmp, val);
153*0Sstevel@tonic-gate }
154