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Commit	Line	Data
	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_OSREFERENCE_HEADER_START@
	5	*
	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the
	10	* License may not be used to create, or enable the creation or
	11	* redistribution of, unlawful or unlicensed copies of an Apple operating
	12	* system, or to circumvent, violate, or enable the circumvention or
	13	* violation of, any terms of an Apple operating system software license
	14	* agreement.
	15	*
	16	* Please obtain a copy of the License at
	17	* http://www.opensource.apple.com/apsl/ and read it before using this
	18	* file.
	19	*
	20	* The Original Code and all software distributed under the License are
	21	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	22	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	23	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	24	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	25	* Please see the License for the specific language governing rights and
	26	* limitations under the License.
	27	*
	28	* @APPLE_LICENSE_OSREFERENCE_HEADER_END@
	29	*/
	30	/*
	31	* @OSF_COPYRIGHT@
	32	*/
	33	/*
	34	* Mach Operating System
	35	* Copyright (c) 1991,1990,1989 Carnegie Mellon University
	36	* All Rights Reserved.
	37	*
	38	* Permission to use, copy, modify and distribute this software and its
	39	* documentation is hereby granted, provided that both the copyright
	40	* notice and this permission notice appear in all copies of the
	41	* software, derivative works or modified versions, and any portions
	42	* thereof, and that both notices appear in supporting documentation.
	43	*
	44	* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
	45	* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
	46	* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
	47	*
	48	* Carnegie Mellon requests users of this software to return to
	49	*
	50	* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
	51	* School of Computer Science
	52	* Carnegie Mellon University
	53	* Pittsburgh PA 15213-3890
	54	*
	55	* any improvements or extensions that they make and grant Carnegie Mellon
	56	* the rights to redistribute these changes.
	57	*/
	58	/*
	59	*/
	60
	61	/*
	62	* C library -- _setjmp, _longjmp
	63	*
	64	* _longjmp(a,v)
	65	* will generate a "return(v)" from
	66	* the last call to
	67	* _setjmp(a)
	68	* by restoring registers from the stack,
	69	* The previous signal state is NOT restored.
	70	*
	71	*/
	72
	73	#include <mach/machine/asm.h>
	74
	75	.private_extern _setjmp
	76	.private_extern _longjmp
	77
	78	ENTRY(setjmp)
	79	movl 4(%esp),%ecx # fetch buffer
	80	movl %ebx,0(%ecx)
	81	movl %esi,4(%ecx)
	82	movl %edi,8(%ecx)
	83	movl %ebp,12(%ecx) # save frame pointer of caller
	84	popl %edx
	85	movl %esp,16(%ecx) # save stack pointer of caller
	86	movl %edx,20(%ecx) # save pc of caller
	87	xorl %eax,%eax
	88	jmp *%edx
	89
	90
	91	ENTRY(longjmp)
	92	movl 8(%esp),%eax # return(v)
	93	movl 4(%esp),%ecx # fetch buffer
	94	movl 0(%ecx),%ebx
	95	movl 4(%ecx),%esi
	96	movl 8(%ecx),%edi
	97	movl 12(%ecx),%ebp
	98	movl 16(%ecx),%esp
	99	orl %eax,%eax
	100	jnz 0f
	101	incl %eax
	102	0: jmp *20(%ecx) # done, return....