17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate  * CDDL HEADER START
37c478bd9Sstevel@tonic-gate  *
47c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
53cd8a1a6SRoger A. Faulkner  * Common Development and Distribution License (the "License").
63cd8a1a6SRoger A. Faulkner  * You may not use this file except in compliance with the License.
77c478bd9Sstevel@tonic-gate  *
87c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
97c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
107c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
117c478bd9Sstevel@tonic-gate  * and limitations under the License.
127c478bd9Sstevel@tonic-gate  *
137c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
147c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
157c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
167c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
177c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
187c478bd9Sstevel@tonic-gate  *
197c478bd9Sstevel@tonic-gate  * CDDL HEADER END
207c478bd9Sstevel@tonic-gate  */
213cd8a1a6SRoger A. Faulkner 
227c478bd9Sstevel@tonic-gate /*
233cd8a1a6SRoger A. Faulkner  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
247c478bd9Sstevel@tonic-gate  */
267c478bd9Sstevel@tonic-gate #ifndef _SIGJMP_STRUCT_H
277c478bd9Sstevel@tonic-gate #define	_SIGJMP_STRUCT_H
297c478bd9Sstevel@tonic-gate #ifdef	__cplusplus
307c478bd9Sstevel@tonic-gate extern "C" {
317c478bd9Sstevel@tonic-gate #endif
337c478bd9Sstevel@tonic-gate #include <sys/types.h>
347c478bd9Sstevel@tonic-gate #include <sys/stack.h>
35*6a8fa7eaSVitaliy Gusev #include <sys/sysmacros.h>
367c478bd9Sstevel@tonic-gate #include <ucontext.h>
377c478bd9Sstevel@tonic-gate #include <setjmp.h>
397c478bd9Sstevel@tonic-gate #if defined(__sparc)
417c478bd9Sstevel@tonic-gate /*
427c478bd9Sstevel@tonic-gate  * The following structure MUST match the ABI size specifier _SIGJBLEN.
437c478bd9Sstevel@tonic-gate  * This is 19 (longs).  The ABI value for _JBLEN is 12 (longs).
447c478bd9Sstevel@tonic-gate  * A greg_t is a long.  A sigset_t is 4 ints and a stack_t is 3 longs.
457c478bd9Sstevel@tonic-gate  *
467c478bd9Sstevel@tonic-gate  * The layout of this structure must match the layout of the same
477c478bd9Sstevel@tonic-gate  * structures defined in usr/src/lib/libbc/libc/sys/common/ucontext.h
487c478bd9Sstevel@tonic-gate  * and usr/src/ucblib/libucb/sparc/sys/setjmp.c.  Other than that,
497c478bd9Sstevel@tonic-gate  * the layout is private, not known to applications.
507c478bd9Sstevel@tonic-gate  *
517c478bd9Sstevel@tonic-gate  * We make the first 5 members match the implementations of
527c478bd9Sstevel@tonic-gate  * setjmp()/longjmp(), so that an application could (stupidly)
537c478bd9Sstevel@tonic-gate  * do sigsetjmp(env) followed by longjmp(env) (but not setjmp(env)
547c478bd9Sstevel@tonic-gate  * followed by siglongjmp(env)).
557c478bd9Sstevel@tonic-gate  */
567c478bd9Sstevel@tonic-gate typedef struct {
577c478bd9Sstevel@tonic-gate 	int		sjs_flags;	/* JBUF[ 0]	*/
587c478bd9Sstevel@tonic-gate 	greg_t		sjs_sp;		/* JBUF[ 1]	*/
597c478bd9Sstevel@tonic-gate 	greg_t		sjs_pc;		/* JBUF[ 2]	*/
607c478bd9Sstevel@tonic-gate 	greg_t		sjs_fp;		/* JBUF[ 3]	*/
617c478bd9Sstevel@tonic-gate 	greg_t		sjs_i7;		/* JBUF[ 4]	*/
627c478bd9Sstevel@tonic-gate 	ucontext_t	*sjs_uclink;
637c478bd9Sstevel@tonic-gate 	ulong_t		sjs_pad[_JBLEN - 6];
647c478bd9Sstevel@tonic-gate 	sigset_t	sjs_sigmask;
657c478bd9Sstevel@tonic-gate #if defined(_LP64)
663cd8a1a6SRoger A. Faulkner 	greg_t		sjs_asi;
673cd8a1a6SRoger A. Faulkner 	greg_t		sjs_fprs;
687c478bd9Sstevel@tonic-gate #endif
697c478bd9Sstevel@tonic-gate 	stack_t		sjs_stack;
707c478bd9Sstevel@tonic-gate } sigjmp_struct_t;
727c478bd9Sstevel@tonic-gate #define	JB_SAVEMASK	0x1
737c478bd9Sstevel@tonic-gate #define	JB_FRAMEPTR	0x2
757c478bd9Sstevel@tonic-gate #endif	/* __sparc */
77*6a8fa7eaSVitaliy Gusev #if defined(__amd64)
78*6a8fa7eaSVitaliy Gusev /*
79*6a8fa7eaSVitaliy Gusev  * The "sigjmp_buf" type is an array of long and thus can have 8-byte alignment
80*6a8fa7eaSVitaliy Gusev  * on AMD64 systems.  The "ucontext_t" type has a stricter 16-byte alignment
81*6a8fa7eaSVitaliy Gusev  * requirement, so we must round the pointer up when casting.
82*6a8fa7eaSVitaliy Gusev  *
83*6a8fa7eaSVitaliy Gusev  * This is not required on other architectures:
84*6a8fa7eaSVitaliy Gusev  *  - SPARC does not store the ucontext_t in the sigjmp_buf
85*6a8fa7eaSVitaliy Gusev  *  - i386 only requires 4-byte alignment for ucontext_t
86*6a8fa7eaSVitaliy Gusev  */
87*6a8fa7eaSVitaliy Gusev #define	SIGJMP2UCONTEXT(x)	\
88*6a8fa7eaSVitaliy Gusev 	((ucontext_t *)P2ROUNDUP((uintptr_t)(x),  sizeof (upad128_t)))
89*6a8fa7eaSVitaliy Gusev #endif
90*6a8fa7eaSVitaliy Gusev 
917c478bd9Sstevel@tonic-gate #ifdef	__cplusplus
927c478bd9Sstevel@tonic-gate }
937c478bd9Sstevel@tonic-gate #endif
957c478bd9Sstevel@tonic-gate #endif /* _SIGJMP_STRUCT_H */