setjmp.h   [plain text]


/*
 * Copyright (c) 2000 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,
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 * Please see the License for the specific language governing rights and
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 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
/*
 * @OSF_COPYRIGHT@
 */

#ifndef	_PPC_SETJMP_H_
#define	_PPC_SETJMP_H_

/*
 * We save the following registers (marked as non-volatile in the ELF spec)
 *
 * r1      - stack pointer
 * r13     - small data area pointer
 * r14-r30 - local variables
 * r31     - local variable/environment pointer
 * 
 * cr      - condition register
 * lr      - link register (to know where to jump back to)
 * xer     - fixed point exception register
 *
 * fpscr   - floating point status and control
 * f14-f31 - local variables
 *
 * which comes to 57 words. We round up to 64 for good measure.
 */

typedef	struct jmp_buf {
	int	jmp_buf[64];
} jmp_buf_t;

#endif	/* _PPC_SETJMP_H_ */