[apple/libc.git] / ppc / sys / _setjmp.h

/*
 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_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. 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
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 *	Copyright (c) 1998, Apple Computer Inc. All rights reserved.
 *
 *	File: _setjmp.h
 *
 *	Defines for register offsets in the save area.
 *
 */

/* NOTE: jmp_bufs are only 4-byte aligned.  This means we
 * need to pad before the VR and FPR save areas, so that they
 * can be naturally aligned in the buffer.  In case a jmp_buf
 * is bcopy'd to a different alignment between the setjmp
 * and longjmp, we need to save the jmp_buf address in the
 * jmp_buf at setjmp time, so we can realign before reloading.
 *
 * ALSO NOTE: the typedef for jmpbufs in <ppc/setjmp.h> is
 * 192 ints (0x300 bytes) long, due to incorrectly assuming
 * that we need to save all 32 VRs in a jmpbuf.  This is
 * fortuitous, because when it came time to add additional
 * fields and expand GPRs for 64-bit mode, there was plenty
 * of unused space!
 */
 
 /* 32-bit-mode layout */
 
#if defined(__ppc__)
 
#define JMP_r1	0x00
#define JMP_r2	0x04
#define JMP_r13	0x08
#define JMP_r14	0x0c
#define JMP_r15	0x10
#define JMP_r16	0x14
#define JMP_r17	0x18
#define JMP_r18	0x1c
#define JMP_r19	0x20
#define JMP_r20	0x24
#define JMP_r21	0x28
#define JMP_r22	0x2c
#define JMP_r23	0x30
#define JMP_r24	0x34
#define JMP_r25	0x38
#define JMP_r26	0x3c
#define JMP_r27	0x40
#define JMP_r28	0x44
#define JMP_r29	0x48
#define JMP_r30	0x4c
#define JMP_r31	0x50
#define JMP_lr  0x54
#define JMP_cr  0x58
#define JMP_SIGFLAG 0x5c
#define JMP_sig	0x60    /* reserve 8 bytes for sigmask */
#define JMP_fpscr  0x68 /* reserve 8 bytes for FPSCR too */
#define JMP_vrsave 0x70
#define JMP_addr_at_setjmp 0x74
/* 12 bytes padding here */
#define JMP_vr_base_addr 0x84
/* save room for 12 VRs (v20-v31), or 0xC0 bytes */
#define JMP_fp_base_addr 0x144
/* save room for 18 FPRs (f14-f31), or 0x90 bytes */
#define JMP_buf_end 0x1d4

 
 /* 64-bit-mode layout */

#elif defined(__ppc64__)

#define JMP_r1	0x00
#define JMP_r2	0x08
#define JMP_r13	0x10
#define JMP_r14	0x18
#define JMP_r15	0x20
#define JMP_r16	0x28
#define JMP_r17	0x30
#define JMP_r18	0x38
#define JMP_r19	0x40
#define JMP_r20	0x48
#define JMP_r21	0x50
#define JMP_r22	0x58
#define JMP_r23	0x60
#define JMP_r24	0x68
#define JMP_r25	0x70
#define JMP_r26	0x78
#define JMP_r27	0x80
#define JMP_r28	0x88
#define JMP_r29	0x90
#define JMP_r30	0x98
#define JMP_r31	0xa0
#define JMP_lr  0xa8
#define JMP_cr  0xb0
#define JMP_sig	0xb8
#define JMP_SIGFLAG 0xc0
#define JMP_fpscr  0xc8
#define JMP_vrsave 0xd0
#define JMP_addr_at_setjmp 0xd8
/* 12 bytes padding here */
#define JMP_vr_base_addr 0x0ec
/* save room for 12 VRs (v20-v31), or 0xC0 bytes */
#define JMP_fp_base_addr 0x1ac
/* save room for 18 FPRs (f14-f31), or 0x90 bytes */
#define JMP_buf_end 0x23c

#else
#error architecture not supported
#endif
Commit	Line	Data
e9ce8d39 A	1	/*
	2	* Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
734aad71 A	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. Please obtain a copy of the License at
	10	* http://www.opensource.apple.com/apsl/ and read it before using this
	11	* file.
	12	*
	13	* The Original Code and all software distributed under the License are
	14	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
e9ce8d39 A	15	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
e9ce8d39 A	16	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
734aad71 A	17	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	18	* Please see the License for the specific language governing rights and
	19	* limitations under the License.
e9ce8d39 A	20	*
	21	* @APPLE_LICENSE_HEADER_END@
	22	*/
	23	/*
	24	* Copyright (c) 1998, Apple Computer Inc. All rights reserved.
	25	*
	26	* File: _setjmp.h
	27	*
	28	* Defines for register offsets in the save area.
	29	*
	30	*/
	31
3b2a1fe8 A	32	/* NOTE: jmp_bufs are only 4-byte aligned. This means we
	33	* need to pad before the VR and FPR save areas, so that they
	34	* can be naturally aligned in the buffer. In case a jmp_buf
	35	* is bcopy'd to a different alignment between the setjmp
	36	* and longjmp, we need to save the jmp_buf address in the
	37	* jmp_buf at setjmp time, so we can realign before reloading.
59e0d9fe A	38	*
	39	* ALSO NOTE: the typedef for jmpbufs in <ppc/setjmp.h> is
	40	* 192 ints (0x300 bytes) long, due to incorrectly assuming
	41	* that we need to save all 32 VRs in a jmpbuf. This is
	42	* fortuitous, because when it came time to add additional
	43	* fields and expand GPRs for 64-bit mode, there was plenty
	44	* of unused space!
3b2a1fe8 A	45	*/
3b2a1fe8 A	46
59e0d9fe A	47	/* 32-bit-mode layout */
	48
	49	#if defined(__ppc__)
	50
e9ce8d39 A	51	#define JMP_r1 0x00
	52	#define JMP_r2 0x04
	53	#define JMP_r13 0x08
	54	#define JMP_r14 0x0c
	55	#define JMP_r15 0x10
	56	#define JMP_r16 0x14
	57	#define JMP_r17 0x18
	58	#define JMP_r18 0x1c
	59	#define JMP_r19 0x20
	60	#define JMP_r20 0x24
	61	#define JMP_r21 0x28
	62	#define JMP_r22 0x2c
	63	#define JMP_r23 0x30
	64	#define JMP_r24 0x34
	65	#define JMP_r25 0x38
	66	#define JMP_r26 0x3c
	67	#define JMP_r27 0x40
	68	#define JMP_r28 0x44
	69	#define JMP_r29 0x48
	70	#define JMP_r30 0x4c
	71	#define JMP_r31 0x50
	72	#define JMP_lr 0x54
	73	#define JMP_cr 0x58
59e0d9fe A	74	#define JMP_SIGFLAG 0x5c
	75	#define JMP_sig 0x60 /* reserve 8 bytes for sigmask */
	76	#define JMP_fpscr 0x68 /* reserve 8 bytes for FPSCR too */
3b2a1fe8 A	77	#define JMP_vrsave 0x70
	78	#define JMP_addr_at_setjmp 0x74
	79	/* 12 bytes padding here */
	80	#define JMP_vr_base_addr 0x84
	81	/* save room for 12 VRs (v20-v31), or 0xC0 bytes */
	82	#define JMP_fp_base_addr 0x144
	83	/* save room for 18 FPRs (f14-f31), or 0x90 bytes */
	84	#define JMP_buf_end 0x1d4
	85
59e0d9fe A	86
	87	/* 64-bit-mode layout */
	88
	89	#elif defined(__ppc64__)
	90
	91	#define JMP_r1 0x00
	92	#define JMP_r2 0x08
	93	#define JMP_r13 0x10
	94	#define JMP_r14 0x18
	95	#define JMP_r15 0x20
	96	#define JMP_r16 0x28
	97	#define JMP_r17 0x30
	98	#define JMP_r18 0x38
	99	#define JMP_r19 0x40
	100	#define JMP_r20 0x48
	101	#define JMP_r21 0x50
	102	#define JMP_r22 0x58
	103	#define JMP_r23 0x60
	104	#define JMP_r24 0x68
	105	#define JMP_r25 0x70
	106	#define JMP_r26 0x78
	107	#define JMP_r27 0x80
	108	#define JMP_r28 0x88
	109	#define JMP_r29 0x90
	110	#define JMP_r30 0x98
	111	#define JMP_r31 0xa0
	112	#define JMP_lr 0xa8
	113	#define JMP_cr 0xb0
	114	#define JMP_sig 0xb8
	115	#define JMP_SIGFLAG 0xc0
	116	#define JMP_fpscr 0xc8
	117	#define JMP_vrsave 0xd0
	118	#define JMP_addr_at_setjmp 0xd8
	119	/* 12 bytes padding here */
	120	#define JMP_vr_base_addr 0x0ec
	121	/* save room for 12 VRs (v20-v31), or 0xC0 bytes */
	122	#define JMP_fp_base_addr 0x1ac
	123	/* save room for 18 FPRs (f14-f31), or 0x90 bytes */
	124	#define JMP_buf_end 0x23c
	125
	126	#else
	127	#error architecture not supported
	128	#endif