| | 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 | /* int _setjmp(jmp_buf env); */ |
| | 25 | /* |
| | 26 | * Copyright (c) 1998 Apple Computer, Inc. All rights reserved. |
| | 27 | * |
| | 28 | * File: sys/ppc/_setjmp.s |
| | 29 | * |
| | 30 | * Implements _setjmp() |
| | 31 | * |
| | 32 | * History: |
| | 33 | * 8 September 1998 Matt Watson (mwatson@apple.com) |
| | 34 | * Created. Derived from setjmp.s |
| | 35 | */ |
| | 36 | |
| | 37 | /* We use mode-independent "g" opcodes such as "stg", and/or |
| | 38 | * mode-independent macros such as MI_GET_ADDRESS. These expand |
| | 39 | * into word operations when targeting __ppc__, and into doubleword |
| | 40 | * operations when targeting __ppc64__. |
| | 41 | */ |
| | 42 | #include <architecture/ppc/mode_independent_asm.h> |
| | 43 | |
| | 44 | #define __APPLE_API_PRIVATE |
| | 45 | #include <machine/cpu_capabilities.h> |
| | 46 | #undef __APPLE_API_PRIVATE |
| | 47 | |
| | 48 | #include "_setjmp.h" |
| | 49 | |
| | 50 | #define VRSave 256 |
| | 51 | |
| | 52 | |
| | 53 | MI_ENTRY_POINT(__setjmp) |
| | 54 | lbz r7, _COMM_PAGE_ALTIVEC(0) ; get "AltiVec available" flag |
| | 55 | |
| | 56 | stg r1, JMP_r1(r3) |
| | 57 | stg r2, JMP_r2(r3) |
| | 58 | stg r13, JMP_r13(r3) |
| | 59 | stg r14, JMP_r14(r3) |
| | 60 | stg r15, JMP_r15(r3) |
| | 61 | stg r16, JMP_r16(r3) |
| | 62 | stg r17, JMP_r17(r3) |
| | 63 | stg r18, JMP_r18(r3) |
| | 64 | stg r19, JMP_r19(r3) |
| | 65 | mfcr r0 ; we only need to save cr2-cr4 |
| | 66 | stg r20, JMP_r20(r3) |
| | 67 | stg r21, JMP_r21(r3) |
| | 68 | stg r22, JMP_r22(r3) |
| | 69 | stg r23, JMP_r23(r3) |
| | 70 | stg r24, JMP_r24(r3) |
| | 71 | mflr r5 |
| | 72 | stg r25, JMP_r25(r3) |
| | 73 | stg r26, JMP_r26(r3) |
| | 74 | stg r27, JMP_r27(r3) |
| | 75 | stg r28, JMP_r28(r3) |
| | 76 | stg r29, JMP_r29(r3) |
| | 77 | stg r30, JMP_r30(r3) |
| | 78 | stg r31, JMP_r31(r3) |
| | 79 | stg r0, JMP_cr(r3) |
| | 80 | stg r5, JMP_lr(r3) |
| | 81 | |
| | 82 | addi r6,r3,JMP_fp_base_addr ; point to base of FPR save area |
| | 83 | stg r3,JMP_addr_at_setjmp(r3) ; remember original address of jmpbuf |
| | 84 | clrrgi r6,r6,4 ; mask off low 4 bits to qw align |
| | 85 | mffs f0 ; get FPSCR |
| | 86 | stfd f14,0*8(r6) |
| | 87 | stfd f15,1*8(r6) |
| | 88 | stfd f16,2*8(r6) |
| | 89 | stfd f17,3*8(r6) |
| | 90 | stfd f18,4*8(r6) |
| | 91 | stfd f19,5*8(r6) |
| | 92 | stfd f20,6*8(r6) |
| | 93 | stfd f21,7*8(r6) |
| | 94 | stfd f22,8*8(r6) |
| | 95 | stfd f23,9*8(r6) |
| | 96 | stfd f24,10*8(r6) |
| | 97 | stfd f25,11*8(r6) |
| | 98 | stfd f26,12*8(r6) |
| | 99 | stfd f27,13*8(r6) |
| | 100 | stfd f28,14*8(r6) |
| | 101 | stfd f29,15*8(r6) |
| | 102 | stfd f30,16*8(r6) |
| | 103 | stfd f31,17*8(r6) |
| | 104 | stfd f0,JMP_fpscr(r3) ; save fpscr in non-sliding region of jmpbuf |
| | 105 | |
| | 106 | cmpwi r7,0 ; is AltiVec available? (test _COMM_PAGE_ALTIVEC) |
| | 107 | addi r6,r3,JMP_vr_base_addr ; get base address of VR save area |
| | 108 | addi r8,r3,JMP_vrsave ; we'll need this address below |
| | 109 | li r3,0 ; set return value (always 0 on setjmp) |
| | 110 | beqlr-- ; exit if no Altivec |
| | 111 | |
| | 112 | mfspr r4,VRSave ; AltiVec available, so get VRSAVE mask |
| | 113 | andi. r0,r4,0xFFF ; we only care about v20-v31 |
| | 114 | stg r0,0(r8) ; save effective VRSAVE in JMP_vrsave |
| | 115 | beqlr++ ; if no live non-volatile VRs, we're done |
| | 116 | |
| | 117 | stvx v20,0,r6 |
| | 118 | li r4,16*1 |
| | 119 | stvx v21,r4,r6 |
| | 120 | li r4,16*2 |
| | 121 | stvx v22,r4,r6 |
| | 122 | li r4,16*3 |
| | 123 | stvx v23,r4,r6 |
| | 124 | li r4,16*4 |
| | 125 | stvx v24,r4,r6 |
| | 126 | li r4,16*5 |
| | 127 | stvx v25,r4,r6 |
| | 128 | li r4,16*6 |
| | 129 | stvx v26,r4,r6 |
| | 130 | li r4,16*7 |
| | 131 | stvx v27,r4,r6 |
| | 132 | li r4,16*8 |
| | 133 | stvx v28,r4,r6 |
| | 134 | li r4,16*9 |
| | 135 | stvx v29,r4,r6 |
| | 136 | li r4,16*10 |
| | 137 | stvx v30,r4,r6 |
| | 138 | li r4,16*11 |
| | 139 | stvx v31,r4,r6 |
| | 140 | |
| | 141 | blr |
| | 142 | |
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