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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
*/
#ifndef _SIGJMP_STRUCT_H
#define _SIGJMP_STRUCT_H
#ifdef __cplusplus
extern "C" {
#endif
#include <sys/types.h>
#include <sys/stack.h>
#include <sys/sysmacros.h>
#include <ucontext.h>
#include <setjmp.h>
#if defined(__sparc)
/*
* The following structure MUST match the ABI size specifier _SIGJBLEN.
* This is 19 (longs). The ABI value for _JBLEN is 12 (longs).
* A greg_t is a long. A sigset_t is 4 ints and a stack_t is 3 longs.
*
* The layout of this structure must match the layout of the same
* structures defined in usr/src/lib/libbc/libc/sys/common/ucontext.h
* and usr/src/ucblib/libucb/sparc/sys/setjmp.c. Other than that,
* the layout is private, not known to applications.
*
* We make the first 5 members match the implementations of
* setjmp()/longjmp(), so that an application could (stupidly)
* do sigsetjmp(env) followed by longjmp(env) (but not setjmp(env)
* followed by siglongjmp(env)).
*/
typedef struct {
int sjs_flags; /* JBUF[ 0] */
greg_t sjs_sp; /* JBUF[ 1] */
greg_t sjs_pc; /* JBUF[ 2] */
greg_t sjs_fp; /* JBUF[ 3] */
greg_t sjs_i7; /* JBUF[ 4] */
ucontext_t *sjs_uclink;
ulong_t sjs_pad[_JBLEN - 6];
sigset_t sjs_sigmask;
#if defined(_LP64)
greg_t sjs_asi;
greg_t sjs_fprs;
#endif
stack_t sjs_stack;
} sigjmp_struct_t;
#define JB_SAVEMASK 0x1
#define JB_FRAMEPTR 0x2
#endif /* __sparc */
#if defined(__amd64)
/*
* The "sigjmp_buf" type is an array of long and thus can have 8-byte alignment
* on AMD64 systems. The "ucontext_t" type has a stricter 16-byte alignment
* requirement, so we must round the pointer up when casting.
*
* This is not required on other architectures:
* - SPARC does not store the ucontext_t in the sigjmp_buf
* - i386 only requires 4-byte alignment for ucontext_t
*/
#define SIGJMP2UCONTEXT(x) \
((ucontext_t *)P2ROUNDUP((uintptr_t)(x), sizeof (upad128_t)))
#endif
#ifdef __cplusplus
}
#endif
#endif /* _SIGJMP_STRUCT_H */
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