Differential D2057 Diff 4204 sys/arm64/include/setjmp.h

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sys/arm64/include/setjmp.h

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				/*-
				* Copyright (c) 1998 John Birrell <jb@cimlogic.com.au>.
				* Copyright (c) 2014 The FreeBSD Foundation
				* All rights reserved.
				*
				* Portions of this software were developed by Andrew Turner
				* under sponsorship from the FreeBSD Foundation
				*
				* 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 author nor the names of any co-contributors
				* may be used to endorse or promote products derived from this software
				* without specific prior written permission.
				*
				* THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL 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.
				*
				* From: FreeBSD: src/sys/i386/include/setjmp.h,v 1.5 2000/10/06
				* $FreeBSD$
				*/

				#ifndef _MACHINE_SETJMP_H_
				#define _MACHINE_SETJMP_H_

				#include <sys/cdefs.h>

				/*
				* We need to store:
				* - A magic value to differentiate the buffers
				* - The stack pointer
				* - The link register
				* - 11 general purpose registers
				* - 8 floating point registers
				* - The signal mask (128 bits)
				* i.e. 24 64-bit words, this can be rounded up to 32 to give us some
				* space to expand into without affecting the ABI.
				* XXX: Is this enough space for expansion?
				*
				* The registers to save are: r19 to r29, and d8 to d15.
				*/
				#define _JBLEN 32
				#define _JB_SIGMASK 21

				/* This should only be needed in libc and may change */
				#ifdef __ASSEMBLER__
				#define _JB_MAGIC__SETJMP 0xfb5d25837d7ff700
				#define _JB_MAGIC_SETJMP 0xfb5d25837d7ff701
				#endif

				#ifndef __ASSEMBLER__
				/*
				* jmp_buf and sigjmp_buf are encapsulated in different structs to force
				* compile-time diagnostics for mismatches. The structs are the same
				* internally to avoid some run-time errors for mismatches.
				*/
				#if __BSD_VISIBLE \|\| __POSIX_VISIBLE \|\| __XSI_VISIBLE
				typedef struct _sigjmp_buf { long _sjb[_JBLEN + 1]; } sigjmp_buf[1];
				#endif

				typedef struct _jmp_buf { long _jb[_JBLEN + 1]; } jmp_buf[1];
				#endif /* __ASSEMBLER__ */

				#endif /* !_MACHINE_SETJMP_H_ */
				impUnsubmitted Not Done Inline Actions This file is also a candidate for the 'rewritten enough to get its own copyright' since it shares almost nothing from its ancestor files with the possible exception of the jmp_buf flavors at the end. imp: This file is also a candidate for the 'rewritten enough to get its own copyright' since it…