| | 1 | /* |
| | 2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 6 | * The contents of this file constitute Original Code as defined in and |
| | 7 | * are subject to the Apple Public Source License Version 1.1 (the |
| | 8 | * "License"). You may not use this file except in compliance with the |
| | 9 | * License. Please obtain a copy of the License at |
| | 10 | * http://www.apple.com/publicsource and read it before using this file. |
| | 11 | * |
| | 12 | * This Original Code and all software distributed under the License are |
| | 13 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| | 14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 16 | * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the |
| | 17 | * License for the specific language governing rights and limitations |
| | 18 | * under the License. |
| | 19 | * |
| | 20 | * @APPLE_LICENSE_HEADER_END@ |
| | 21 | */ |
| | 22 | /* |
| | 23 | * @OSF_COPYRIGHT@ |
| | 24 | */ |
| | 25 | |
| | 26 | /* |
| | 27 | * C library -- _setjmp, _longjmp |
| | 28 | * |
| | 29 | * _longjmp(a,v) |
| | 30 | * will generate a "return(v)" from |
| | 31 | * the last call to |
| | 32 | * _setjmp(a) |
| | 33 | * by restoring registers from the stack, |
| | 34 | * The previous signal state is NOT restored. |
| | 35 | * |
| | 36 | * NOTE : MUST BE KEPT CONSISTENT WITH gdb/config/powerpc/tm-ppc-eabi.h |
| | 37 | * (which needs to know where to find the destination address) |
| | 38 | */ |
| | 39 | |
| | 40 | #include <ppc/asm.h> |
| | 41 | |
| | 42 | /* |
| | 43 | * setjmp : ARG0 (r3) contains the address of |
| | 44 | * the structure where we are to |
| | 45 | * store the context |
| | 46 | * Uses r0 as scratch register |
| | 47 | * |
| | 48 | * NOTE : MUST BE KEPT CONSISTENT WITH gdb/config/powerpc/tm-ppc-eabi.h |
| | 49 | * (which needs to know where to find the destination address) |
| | 50 | */ |
| | 51 | |
| | 52 | ENTRY(_setjmp,TAG_NO_FRAME_USED) |
| | 53 | /* first entry is used for r1 - stack ptr */ |
| | 54 | stw r13, 4(ARG0) /* GPR context. We avoid multiple-word */ |
| | 55 | stw r14, 8(ARG0) /* instructions as they're slower (?) */ |
| | 56 | stw r15, 12(ARG0) |
| | 57 | stw r16, 16(ARG0) |
| | 58 | stw r17, 20(ARG0) |
| | 59 | stw r18, 24(ARG0) |
| | 60 | stw r19, 28(ARG0) |
| | 61 | stw r20, 32(ARG0) |
| | 62 | stw r21, 36(ARG0) |
| | 63 | stw r22, 40(ARG0) |
| | 64 | stw r23, 44(ARG0) |
| | 65 | stw r24, 48(ARG0) |
| | 66 | stw r25, 52(ARG0) |
| | 67 | stw r26, 56(ARG0) |
| | 68 | stw r27, 60(ARG0) |
| | 69 | stw r28, 64(ARG0) |
| | 70 | stw r29, 68(ARG0) |
| | 71 | stw r30, 72(ARG0) |
| | 72 | stw r31, 76(ARG0) |
| | 73 | |
| | 74 | mfcr r0 |
| | 75 | stw r0, 80(ARG0) /* Condition register */ |
| | 76 | |
| | 77 | mflr r0 |
| | 78 | stw r0, 84(ARG0) /* Link register */ |
| | 79 | |
| | 80 | mfxer r0 |
| | 81 | stw r0, 88(ARG0) /* Fixed point exception register */ |
| | 82 | |
| | 83 | #if FLOATING_POINT_SUPPORT /* TODO NMGS probably not needed for kern */ |
| | 84 | mffs r0 |
| | 85 | stw r0, 92(ARG0) /* Floating point status register */ |
| | 86 | |
| | 87 | stfd f14, 96(ARG0) /* Floating point context - 8 byte aligned */ |
| | 88 | stfd f15, 104(ARG0) |
| | 89 | stfd f16, 112(ARG0) |
| | 90 | stfd f17, 120(ARG0) |
| | 91 | stfd f18, 138(ARG0) |
| | 92 | stfd f19, 146(ARG0) |
| | 93 | stfd f20, 144(ARG0) |
| | 94 | stfd f21, 152(ARG0) |
| | 95 | stfd f22, 160(ARG0) |
| | 96 | stfd f23, 178(ARG0) |
| | 97 | stfd f24, 186(ARG0) |
| | 98 | stfd f25, 184(ARG0) |
| | 99 | stfd f26, 192(ARG0) |
| | 100 | stfd f27, 200(ARG0) |
| | 101 | stfd f28, 218(ARG0) |
| | 102 | stfd f29, 226(ARG0) |
| | 103 | stfd f30, 224(ARG0) |
| | 104 | stfd f31, 232(ARG0) |
| | 105 | |
| | 106 | #endif |
| | 107 | |
| | 108 | stw r1, 0(ARG0) /* finally, save the stack pointer */ |
| | 109 | li ARG0, 0 /* setjmp must return zero */ |
| | 110 | blr |
| | 111 | |
| | 112 | /* |
| | 113 | * longjmp : ARG0 (r3) contains the address of |
| | 114 | * the structure from where we are to |
| | 115 | * restore the context. |
| | 116 | * ARG1 (r4) contains the non-zero |
| | 117 | * value that we must return to |
| | 118 | * that context. |
| | 119 | * Uses r0 as scratch register |
| | 120 | * |
| | 121 | * NOTE : MUST BE KEPT CONSISTENT WITH gdb/config/powerpc/tm-ppc-eabi.h |
| | 122 | * (which needs to know where to find the destination address) |
| | 123 | */ |
| | 124 | |
| | 125 | ENTRY(_longjmp, TAG_NO_FRAME_USED) /* TODO NMGS - need correct tag */ |
| | 126 | lwz r13, 4(ARG0) /* GPR context. We avoid multiple-word */ |
| | 127 | lwz r14, 8(ARG0) /* instructions as they're slower (?) */ |
| | 128 | lwz r15, 12(ARG0) |
| | 129 | lwz r16, 16(ARG0) |
| | 130 | lwz r17, 20(ARG0) |
| | 131 | lwz r18, 24(ARG0) |
| | 132 | lwz r19, 28(ARG0) |
| | 133 | lwz r20, 32(ARG0) |
| | 134 | lwz r21, 36(ARG0) |
| | 135 | lwz r22, 40(ARG0) |
| | 136 | lwz r23, 44(ARG0) |
| | 137 | lwz r24, 48(ARG0) |
| | 138 | lwz r25, 52(ARG0) |
| | 139 | lwz r26, 56(ARG0) |
| | 140 | lwz r27, 60(ARG0) |
| | 141 | lwz r28, 64(ARG0) |
| | 142 | lwz r29, 68(ARG0) |
| | 143 | lwz r30, 72(ARG0) |
| | 144 | lwz r31, 76(ARG0) |
| | 145 | |
| | 146 | lwz r0, 80(ARG0) /* Condition register */ |
| | 147 | mtcr r0 /* Use r5 as scratch register */ |
| | 148 | |
| | 149 | lwz r0, 84(ARG0) /* Link register */ |
| | 150 | mtlr r0 |
| | 151 | |
| | 152 | lwz r0, 88(ARG0) /* Fixed point exception register */ |
| | 153 | mtxer r0 |
| | 154 | |
| | 155 | #ifdef FLOATING_POINT_SUPPORT |
| | 156 | lwz r0, 92(ARG0) /* Floating point status register */ |
| | 157 | mtfs r0 |
| | 158 | |
| | 159 | lfd f14, 96(ARG0) /* Floating point context - 8 byte aligned */ |
| | 160 | lfd f15, 104(ARG0) |
| | 161 | lfd f16, 112(ARG0) |
| | 162 | lfd f17, 120(ARG0) |
| | 163 | lfd f18, 128(ARG0) |
| | 164 | lfd f19, 136(ARG0) |
| | 165 | lfd f20, 144(ARG0) |
| | 166 | lfd f21, 152(ARG0) |
| | 167 | lfd f22, 160(ARG0) |
| | 168 | lfd f23, 168(ARG0) |
| | 169 | lfd f24, 176(ARG0) |
| | 170 | lfd f25, 184(ARG0) |
| | 171 | lfd f26, 192(ARG0) |
| | 172 | lfd f27, 200(ARG0) |
| | 173 | lfd f28, 208(ARG0) |
| | 174 | lfd f29, 216(ARG0) |
| | 175 | lfd f30, 224(ARG0) |
| | 176 | lfd f31, 232(ARG0) |
| | 177 | |
| | 178 | #endif /* FLOATING_POINT_SUPPORT */ |
| | 179 | |
| | 180 | |
| | 181 | lwz r1, 0(ARG0) /* finally, restore the stack pointer */ |
| | 182 | |
| | 183 | mr. ARG0, ARG1 /* set the return value */ |
| | 184 | bnelr /* return if non-zero */ |
| | 185 | |
| | 186 | li ARG0, 1 |
| | 187 | blr /* never return 0, return 1 instead */ |
| | 188 | |
projects / apple / xnu.git / blame_incremental