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1.1 ! root 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:
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