1 /* $NetBSD: mcontext.h,v 1.6 2003/10/08 22:43:01 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Klaus Klein. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #ifndef _POWERPC_MCONTEXT_H_ 40 #define _POWERPC_MCONTEXT_H_ 41 42 /* 43 * Layout of mcontext_t based on the System V Application Binary Interface, 44 * Edition 4.1, PowerPC Processor ABI Supplement - September 1995, and 45 * extended for the AltiVec Register File. Note that due to the increased 46 * alignment requirements of the latter, the offset of mcontext_t within 47 * an ucontext_t is different from System V. 48 */ 49 50 #define _NGREG 39 /* GR0-31, CR, LR, SRR0, SRR1, CTR, XER, MQ */ 51 52 typedef long __greg_t; 53 typedef __greg_t __gregset_t[_NGREG]; 54 55 #define _REG_R0 0 56 #define _REG_R1 1 57 #define _REG_R2 2 58 #define _REG_R3 3 59 #define _REG_R4 4 60 #define _REG_R5 5 61 #define _REG_R6 6 62 #define _REG_R7 7 63 #define _REG_R8 8 64 #define _REG_R9 9 65 #define _REG_R10 10 66 #define _REG_R11 11 67 #define _REG_R12 12 68 #define _REG_R13 13 69 #define _REG_R14 14 70 #define _REG_R15 15 71 #define _REG_R16 16 72 #define _REG_R17 17 73 #define _REG_R18 18 74 #define _REG_R19 19 75 #define _REG_R20 20 76 #define _REG_R21 21 77 #define _REG_R22 22 78 #define _REG_R23 23 79 #define _REG_R24 24 80 #define _REG_R25 25 81 #define _REG_R26 26 82 #define _REG_R27 27 83 #define _REG_R28 28 84 #define _REG_R29 29 85 #define _REG_R30 30 86 #define _REG_R31 31 87 #define _REG_CR 32 /* Condition Register */ 88 #define _REG_LR 33 /* Link Register */ 89 #define _REG_PC 34 /* PC (copy of SRR0) */ 90 #define _REG_MSR 35 /* MSR (copy of SRR1) */ 91 #define _REG_CTR 36 /* Count Register */ 92 #define _REG_XER 37 /* Integet Exception Reigster */ 93 #define _REG_MQ 38 /* MQ Register (POWER only) */ 94 95 typedef struct { 96 double __fpu_regs[32]; /* FP0-31 */ 97 unsigned int __fpu_fpscr; /* FP Status and Control Register */ 98 unsigned int __fpu_valid; /* Set together with _UC_FPU */ 99 } __fpregset_t; 100 101 #define _NVR 32 /* Number of Vector registers */ 102 103 typedef struct { 104 union __vr { 105 unsigned char __vr8[16]; 106 unsigned short __vr16[8]; 107 unsigned int __vr32[4]; 108 } __vrs[_NVR] __attribute__((__aligned__(16))); 109 unsigned int __vscr; /* VSCR */ 110 unsigned int __vrsave; /* VRSAVE */ 111 } __vrf_t; 112 113 typedef struct { 114 __gregset_t __gregs; /* General Purpose Register set */ 115 __fpregset_t __fpregs; /* Floating Point Register set */ 116 __vrf_t __vrf; /* Vector Register File */ 117 } mcontext_t; 118 119 /* Machine-dependent uc_flags */ 120 #define _UC_POWERPC_VEC 0x00010000 /* Vector Register File valid */ 121 122 #define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_R1]) 123 #define _UC_MACHINE_PC(uc) ((uc)->uc_mcontext.__gregs[_REG_PC]) 124 #define _UC_MACHINE_INTRV(uc) ((uc)->uc_mcontext.__gregs[_REG_R3]) 125 126 #define _UC_MACHINE_SET_PC(uc, pc) _UC_MACHINE_PC(uc) = (pc) 127 128 #endif /* !_POWERPC_MCONTEXT_H_ */ 129