e7b3b8b467
If we switch from x18 to gp for shadow call stack, we're going to need another slot in jmp_buf. We'll need this even for hardware shadow call stacks too. While I'm here, and because this is likely my last chance, let's just round this up to 32 for safety. musl and glibc only have the minimum needed (which I think means they'll need an ABI break to support SCS unless they just use a callee-saved general purpose register), but since we can't do ABI breaks after we ship, let's play it safe. Bug: https://github.com/google/android-riscv64/issues/72 Test: treehugger Change-Id: I60661fb7a308c900bfd08c9361f51919b798c005
111 lines
3.8 KiB
C
111 lines
3.8 KiB
C
/* $OpenBSD: setjmp.h,v 1.5 2005/12/13 00:35:22 millert Exp $ */
|
|
/* $NetBSD: setjmp.h,v 1.11 1994/12/20 10:35:44 cgd Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1990, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
* (c) UNIX System Laboratories, Inc.
|
|
* All or some portions of this file are derived from material licensed
|
|
* to the University of California by American Telephone and Telegraph
|
|
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
|
|
* the permission of UNIX System Laboratories, Inc.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)setjmp.h 8.2 (Berkeley) 1/21/94
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
/**
|
|
* @file setjmp.h
|
|
* @brief Non-local jumps.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
|
|
#if defined(__aarch64__)
|
|
#define _JBLEN 32
|
|
#elif defined(__arm__)
|
|
#define _JBLEN 64
|
|
#elif defined(__i386__)
|
|
#define _JBLEN 10
|
|
#elif defined(__riscv)
|
|
#define _JBLEN 32
|
|
#elif defined(__x86_64__)
|
|
#define _JBLEN 11
|
|
#endif
|
|
|
|
/** The type of the buffer used by sigsetjmp()/siglongjmp(). */
|
|
typedef long sigjmp_buf[_JBLEN + 1];
|
|
|
|
/** The type of the buffer used by setjmp()/longjmp(). */
|
|
typedef long jmp_buf[_JBLEN];
|
|
|
|
#undef _JBLEN
|
|
|
|
__BEGIN_DECLS
|
|
|
|
/**
|
|
* Equivalent to sigsetjmp() with the second argument 0, so that the signal
|
|
* mask is not saved.
|
|
*/
|
|
int _setjmp(jmp_buf __env) __returns_twice;
|
|
|
|
/** Equivalent to siglongjmp(). */
|
|
__noreturn void _longjmp(jmp_buf __env, int __value);
|
|
|
|
/**
|
|
* Equivalent to sigsetjmp() with the second argument 1, so that the signal
|
|
* mask is saved.
|
|
*/
|
|
int setjmp(jmp_buf __env) __returns_twice;
|
|
|
|
/** C11 says setjmp() must be a macro, but Android already had a function. */
|
|
#define setjmp(__env) setjmp(__env)
|
|
|
|
/** Equivalent to siglongjmp(). */
|
|
__noreturn void longjmp(jmp_buf __env, int __value);
|
|
|
|
/**
|
|
* [sigsetjmp(3)](http://man7.org/linux/man-pages/man3/sigsetjmp.3.html)
|
|
* sets the target of a future siglongjmp() call, saving or not saving the
|
|
* current signal mask based on the second argument.
|
|
*
|
|
* Returns 0 when first called, and returns the value passed to siglongjmp()
|
|
* when returning here as a result of a siglongjmp() call.
|
|
*/
|
|
int sigsetjmp(sigjmp_buf __env, int __save_signal_mask) __returns_twice;
|
|
|
|
/**
|
|
* [siglongjmp(3)](http://man7.org/linux/man-pages/man3/siglongjmp.3.html)
|
|
* transfers control back to the site of the sigsetjmp() call that initialized
|
|
* the given jump buffer, returning the given value.
|
|
*
|
|
* Does not return.
|
|
*/
|
|
__noreturn void siglongjmp(sigjmp_buf __env, int __value);
|
|
|
|
__END_DECLS
|