mcontext.h revision 1.3
1 /* $NetBSD: mcontext.h,v 1.3 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 _SPARC_MCONTEXT_H_ 40 #define _SPARC_MCONTEXT_H_ 41 42 /* 43 * Layout of mcontext_t according the System V Application Binary Interface, 44 * Edition 4.1, SPARC Processor ABI Supplement and updated for SPARC v9. 45 */ 46 47 #ifdef __arch64__ 48 #define _NGREG 21 /* %ccr, pc, npc, %g1-7, %o0-7, %asi, %fprs */ 49 #else 50 #define _NGREG 19 /* %psr, pc, npc, %g1-7, %o0-7 */ 51 #endif 52 typedef long int __greg_t; 53 typedef __greg_t __gregset_t[_NGREG]; 54 55 /* Offsets into gregset_t, for convenience. */ 56 #ifdef __arch64__ 57 #define _REG_CCR 0 58 #else 59 #define _REG_PSR 0 60 #endif 61 #define _REG_PC 1 62 #define _REG_nPC 2 63 #define _REG_Y 3 64 #define _REG_G1 4 65 #define _REG_G2 5 66 #define _REG_G3 6 67 #define _REG_G4 7 68 #define _REG_G5 8 69 #define _REG_G6 9 70 #define _REG_G7 10 71 #define _REG_O0 11 72 #define _REG_O1 12 73 #define _REG_O2 13 74 #define _REG_O3 14 75 #define _REG_O4 15 76 #define _REG_O5 16 77 #define _REG_O6 17 78 #define _REG_O7 18 79 #ifdef __arch64__ 80 #define _REG_ASI 19 81 #define _REG_FPRS 20 82 #endif 83 84 85 #define _SPARC_MAXREGWINDOW 31 86 87 /* Layout of a register window. */ 88 typedef struct { 89 __greg_t __rw_local[8]; /* %l0-7 */ 90 __greg_t __rw_in[8]; /* %i0-7 */ 91 } __rwindow_t; 92 93 /* Description of available register windows. */ 94 typedef struct { 95 int __wbcnt; 96 __greg_t * __spbuf[_SPARC_MAXREGWINDOW]; 97 __rwindow_t __wbuf[_SPARC_MAXREGWINDOW]; 98 } __gwindows_t; 99 100 /* FPU address queue */ 101 struct __fpq { 102 unsigned int * __fpq_addr; /* address */ 103 unsigned int __fpq_instr; /* instruction */ 104 }; 105 106 struct __fq { 107 union { 108 double __whole; 109 struct __fpq __fpq; 110 } _FQu; 111 }; 112 113 /* FPU state description */ 114 typedef struct { 115 union { 116 unsigned int __fpu_regs[32]; 117 #ifdef __arch64__ 118 double __fpu_dregs[32]; 119 long double __fpu_qregs[16]; 120 #else 121 double __fpu_dregs[16]; 122 #endif 123 } __fpu_fr; /* FPR contents */ 124 struct __fq * __fpu_q; /* pointer to FPU insn queue */ 125 unsigned long __fpu_fsr; /* %fsr */ 126 unsigned char __fpu_qcnt; /* # entries in __fpu_q */ 127 unsigned char __fpu_q_entrysize; /* size of a __fpu_q entry */ 128 unsigned char __fpu_en; /* this context valid? */ 129 } __fpregset_t; 130 131 /* `Extra Register State'(?) */ 132 typedef struct { 133 unsigned int __xrs_id; /* See below */ 134 char * __xrs_ptr; /* points into filler area */ 135 } __xrs_t; 136 137 #define _XRS_ID 0x78727300 /* 'xrs\0' */ 138 139 #ifdef __arch64__ 140 /* Ancillary State Registers, 16-31 are available to user programs */ 141 typedef long __asrset_t[16]; /* %asr16-31 */ 142 #endif 143 144 typedef struct { 145 __gregset_t __gregs; /* GPR state */ 146 __gwindows_t * __gwins; /* may point to register windows */ 147 __fpregset_t __fpregs; /* FPU state, if any */ 148 __xrs_t __xrs; /* may indicate extra reg state */ 149 #ifdef __arch64__ 150 __asrset_t __asrs; /* ASR state */ 151 #endif 152 #ifdef __arch64__ 153 long int __filler[4]; 154 #else 155 long int __filler[19]; 156 #endif 157 } mcontext_t; 158 159 #ifdef __arch64__ 160 #define _UC_MACHINE_PAD 4 /* Padding appended to ucontext_t */ 161 #define _UC_MACHINE_SP(uc) (((uc)->uc_mcontext.__gregs[_REG_O6])+0x7ff) 162 #else 163 #define _UC_MACHINE_PAD 23 /* Padding appended to ucontext_t */ 164 #define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_O6]) 165 #endif 166 #define _UC_MACHINE_PC(uc) ((uc)->uc_mcontext.__gregs[_REG_PC]) 167 #define _UC_MACHINE_INTRV(uc) ((uc)->uc_mcontext.__gregs[_REG_O0]) 168 169 #define _UC_MACHINE_SET_PC(uc, pc) \ 170 do { \ 171 (uc)->uc_mcontext.__gregs[_REG_PC] = (pc); \ 172 (uc)->uc_mcontext.__gregs[_REG_nPC] = (pc) + 4; \ 173 } while (/*CONSTCOND*/0) 174 175 #endif /* !_SPARC_MCONTEXT_H_ */ 176
Indexes created Mon Sep 22 13:09:51 GMT 2025