1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
24 */
25
26#ifndef _SIGJMP_STRUCT_H
27#define	_SIGJMP_STRUCT_H
28
29#ifdef	__cplusplus
30extern "C" {
31#endif
32
33#include <sys/types.h>
34#include <sys/stack.h>
35#include <sys/sysmacros.h>
36#include <ucontext.h>
37#include <setjmp.h>
38
39#if defined(__sparc)
40
41/*
42 * The following structure MUST match the ABI size specifier _SIGJBLEN.
43 * This is 19 (longs).  The ABI value for _JBLEN is 12 (longs).
44 * A greg_t is a long.  A sigset_t is 4 ints and a stack_t is 3 longs.
45 *
46 * The layout of this structure must match the layout of the same
47 * structures defined in usr/src/lib/libbc/libc/sys/common/ucontext.h
48 * and usr/src/ucblib/libucb/sparc/sys/setjmp.c.  Other than that,
49 * the layout is private, not known to applications.
50 *
51 * We make the first 5 members match the implementations of
52 * setjmp()/longjmp(), so that an application could (stupidly)
53 * do sigsetjmp(env) followed by longjmp(env) (but not setjmp(env)
54 * followed by siglongjmp(env)).
55 */
56typedef struct {
57	int		sjs_flags;	/* JBUF[ 0]	*/
58	greg_t		sjs_sp;		/* JBUF[ 1]	*/
59	greg_t		sjs_pc;		/* JBUF[ 2]	*/
60	greg_t		sjs_fp;		/* JBUF[ 3]	*/
61	greg_t		sjs_i7;		/* JBUF[ 4]	*/
62	ucontext_t	*sjs_uclink;
63	ulong_t		sjs_pad[_JBLEN - 6];
64	sigset_t	sjs_sigmask;
65#if defined(_LP64)
66	greg_t		sjs_asi;
67	greg_t		sjs_fprs;
68#endif
69	stack_t		sjs_stack;
70} sigjmp_struct_t;
71
72#define	JB_SAVEMASK	0x1
73#define	JB_FRAMEPTR	0x2
74
75#endif	/* __sparc */
76
77#if defined(__amd64)
78/*
79 * The "sigjmp_buf" type is an array of long and thus can have 8-byte alignment
80 * on AMD64 systems.  The "ucontext_t" type has a stricter 16-byte alignment
81 * requirement, so we must round the pointer up when casting.
82 *
83 * This is not required on other architectures:
84 *  - SPARC does not store the ucontext_t in the sigjmp_buf
85 *  - i386 only requires 4-byte alignment for ucontext_t
86 */
87#define	SIGJMP2UCONTEXT(x)	\
88	((ucontext_t *)P2ROUNDUP((uintptr_t)(x),  sizeof (upad128_t)))
89#endif
90
91#ifdef	__cplusplus
92}
93#endif
94
95#endif /* _SIGJMP_STRUCT_H */
96