130 lines
4.7 KiB
C
130 lines
4.7 KiB
C
/* $OpenBSD: setjmp.h,v 1.5 2005/12/13 00:35:22 millert Exp $ */
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/* $NetBSD: setjmp.h,v 1.11 1994/12/20 10:35:44 cgd Exp $ */
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/*-
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)setjmp.h 8.2 (Berkeley) 1/21/94
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*/
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#pragma once
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/**
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* @file setjmp.h
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* @brief Non-local jumps.
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*/
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#include <sys/cdefs.h>
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#if defined(__aarch64__)
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/**
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* The size in words of an arm64 jmp_buf. Room for callee-saved registers,
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* including floating point, stack pointer and program counter, various
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* internal implementation details, and leaving some free space.
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*
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* Coincidentally matches OpenBSD, though they also save/restore the
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* floating point status register too.
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*/
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#define _JBLEN 32
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#elif defined(__arm__)
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/** The size in words of an arm32 jmp_buf. Inherited from OpenBSD. */
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#define _JBLEN 64
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#elif defined(__i386__)
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/** The size in words of an x86 jmp_buf. Inherited from OpenBSD. */
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#define _JBLEN 10
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#elif defined(__riscv)
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/**
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* The size in words of a riscv64 jmp_buf. Room for callee-saved registers,
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* including floating point, stack pointer and program counter, various
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* internal implementation details, and leaving some free space.
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*
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* Coincidentally matches OpenBSD, though they also save/restore the
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* floating point status register too.
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*/
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#define _JBLEN 32
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#elif defined(__x86_64__)
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/** The size in words of an x86-64 jmp_buf. Inherited from OpenBSD. */
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#define _JBLEN 11
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#endif
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/** The type of the buffer used by sigsetjmp()/siglongjmp(). */
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typedef long sigjmp_buf[_JBLEN + 1];
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/** The type of the buffer used by setjmp()/longjmp(). */
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typedef long jmp_buf[_JBLEN];
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#undef _JBLEN
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__BEGIN_DECLS
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/**
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* Equivalent to sigsetjmp() with the second argument 0, so that the signal
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* mask is not saved.
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*/
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int _setjmp(jmp_buf __env) __returns_twice;
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/** Equivalent to siglongjmp(). */
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__noreturn void _longjmp(jmp_buf __env, int __value);
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/**
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* Equivalent to sigsetjmp() with the second argument 1, so that the signal
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* mask is saved.
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*/
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int setjmp(jmp_buf __env) __returns_twice;
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/** C11 says setjmp() must be a macro, but Android already had a function. */
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#define setjmp(__env) setjmp(__env)
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/** Equivalent to siglongjmp(). */
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__noreturn void longjmp(jmp_buf __env, int __value);
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/**
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* [sigsetjmp(3)](http://man7.org/linux/man-pages/man3/sigsetjmp.3.html)
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* sets the target of a future siglongjmp() call, saving or not saving the
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* current signal mask based on the second argument.
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*
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* Returns 0 when first called, and returns the value passed to siglongjmp()
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* when returning here as a result of a siglongjmp() call.
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*/
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int sigsetjmp(sigjmp_buf __env, int __save_signal_mask) __returns_twice;
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/**
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* [siglongjmp(3)](http://man7.org/linux/man-pages/man3/siglongjmp.3.html)
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* transfers control back to the site of the sigsetjmp() call that initialized
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* the given jump buffer, returning the given value.
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*
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* Does not return.
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*/
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__noreturn void siglongjmp(sigjmp_buf __env, int __value);
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__END_DECLS
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