ppc/sys/_setjmp.h

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_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. 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
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  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.
  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
  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.
  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!
  45  */
  46
  47  /* 32-bit-mode layout */
  48
  49 #if defined(__ppc__)
  50
  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
  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 */
  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
  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