xnu-1456.1.26.tar.gz

[apple/xnu.git] / bsd / ppc / setjmp.h

/*
 * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
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 * 
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
/* Copyright (c) 1998 Apple Computer, Inc.  All rights reserved.
 *
 *	File:	ppc/setjmp.h
 *
 *	Declaration of setjmp routines and data structures.
 */
#ifndef _BSD_PPC_SETJMP_H_
#define _BSD_PPC_SETJMP_H_

#include <sys/cdefs.h>

#define __need_struct_sigcontext
#if defined(KERNEL)
#define __need_struct_sigcontext32
#define __need_struct_sigcontext64
#endif /* KERNEL */
#include <ppc/_structs.h>

struct _jmp_buf {
#if __DARWIN_UNIX03
	_STRUCT_SIGCONTEXT	__sigcontext; /* kernel state preserved by set/longjmp */
	unsigned int __vmask __attribute__((aligned(8))); /* vector mask register */
	unsigned int __vreg[32 * 4] __attribute__((aligned(16)));
		/* 32 128-bit vector registers */
#else /* !__DARWIN_UNIX03 */
	_STRUCT_SIGCONTEXT	sigcontext; /* kernel state preserved by set/longjmp */
	unsigned int vmask __attribute__((aligned(8))); /* vector mask register */
	unsigned int vreg[32 * 4] __attribute__((aligned(16)));
		/* 32 128-bit vector registers */
#endif /* __DARWIN_UNIX03 */
};

/*
 *	_JBLEN is number of ints required to save the following:
 *	r1, r2, r13-r31, lr, cr, ctr, xer, sig  == 26 register_t sized
 *	fr14 -  fr31 = 18 doubles
 *	vmask, 32 vector registers = 129 ints
 *	2 ints to get all the elements aligned 
 *
 *	register_t is 2 ints for ppc64 threads
 */
#define _JBLEN64	(26*2 + 18*2 + 129 + 1)
#define _JBLEN32	(26 + 18*2 + 129 + 1)
#define _JBLEN_MAX	_JBLEN64

/*
 * Locally scoped sizes
 */
#if defined(__ppc64__)
#define _JBLEN _JBLEN64
#else
#define _JBLEN _JBLEN32
#endif

#if defined(KERNEL)
typedef _STRUCT_SIGCONTEXT32 jmp_buf32[1];
typedef struct __sigjmp_buf32 {
		int __storage[_JBLEN32 + 1] __attribute__((aligned(8)));
		} sigjmp_buf32[1];

typedef struct sigcontext64 jmp_buf64[1];
typedef struct __sigjmp_buf64 {
		int __storage[_JBLEN64 + 1] __attribute__((aligned(8)));
		} sigjmp_buf64[1];

/*
 * JMM - have to decide how the kernel will deal with this.
 * For now, hard-code the 32-bit types.
 */
typedef _STRUCT_SIGCONTEXT32 jmp_buf[1];
typedef struct __sigjmp_buf32 sigjmp_buf[1];

#else
typedef int jmp_buf[_JBLEN];
typedef int sigjmp_buf[_JBLEN + 1];
#endif

__BEGIN_DECLS
int	setjmp(jmp_buf);
void	longjmp(jmp_buf, int);

#ifndef _ANSI_SOURCE
int	_setjmp(jmp_buf);
void	_longjmp(jmp_buf, int);
int	sigsetjmp(sigjmp_buf, int);
void	siglongjmp(sigjmp_buf, int);
#endif /* _ANSI_SOURCE  */

#if !defined(_ANSI_SOURCE) && (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE))
void	longjmperror(void);
#endif /* neither ANSI nor POSIX */
__END_DECLS

#endif /* !_BSD_PPC_SETJMP_H_ */