1 /* $NetBSD: mcontext.h,v 1.6 2004/07/03 05:06:37 simonb Exp $ */ 2 3 /*- 4 * Copyright (c) 1999, 2002 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, and by Jason R. Thorpe of Wasabi Systems, Inc. 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 _MIPS_MCONTEXT_H_ 40 #define _MIPS_MCONTEXT_H_ 41 42 /* 43 * General register state 44 */ 45 #define _NGREG 37 /* R0-R31, MDLO, MDHI, CAUSE, PC, SR */ 46 47 #define _REG_R0 0 48 #define _REG_AT 1 49 #define _REG_V0 2 50 #define _REG_V1 3 51 #define _REG_A0 4 52 #define _REG_A1 5 53 #define _REG_A2 6 54 #define _REG_A3 7 55 #define _REG_T0 8 56 #define _REG_T1 9 57 #define _REG_T2 10 58 #define _REG_T3 11 59 #define _REG_T4 12 60 #define _REG_T5 13 61 #define _REG_T6 14 62 #define _REG_T7 15 63 #define _REG_S0 16 64 #define _REG_S1 17 65 #define _REG_S2 18 66 #define _REG_S3 19 67 #define _REG_S4 20 68 #define _REG_S5 21 69 #define _REG_S6 22 70 #define _REG_S7 23 71 #define _REG_T8 24 72 #define _REG_T9 25 73 #define _REG_K0 26 74 #define _REG_K1 27 75 #define _REG_GP 28 76 #define _REG_SP 29 77 #define _REG_S8 30 78 #define _REG_RA 31 79 80 /* XXX: The following conflict with <mips/regnum.h> */ 81 #define _REG_MDLO 32 82 #define _REG_MDHI 33 83 #define _REG_CAUSE 34 84 #define _REG_EPC 35 85 #define _REG_SR 36 86 87 #ifndef __ASSEMBLER__ 88 89 /* Make sure this is signed; we need pointers to be sign-extended. */ 90 #if defined(__mips_n32) 91 typedef long long __greg_t; 92 #else 93 typedef long __greg_t; 94 #endif /* __mips_n32 */ 95 96 typedef __greg_t __gregset_t[_NGREG]; 97 98 /* 99 * For the O32 ABI, there are 16 doubles, one at each even FP reg 100 * number. The FP registers themselves are 32-bits. 101 * 102 * For 64-bit ABIs (include N32), each FP register is a 64-bit double. 103 */ 104 typedef __greg_t __freg_t; 105 106 /* 107 * Floating point register state 108 */ 109 #if defined(__mips_n32) || defined(_LP64) 110 typedef struct { 111 union { 112 double __fp64_dregs[32]; 113 __freg_t __fp_regs[32]; 114 } __fp_r; 115 unsigned int __fp_csr; 116 unsigned int __fp_pad; 117 } __fpregset_t; 118 #else /* !(__mips_n32 || _LP64) */ 119 typedef struct { 120 union { 121 double __fp_dregs[16]; 122 float __fp_fregs[32]; 123 __freg_t __fp_regs[32]; 124 } __fp_r; 125 unsigned int __fp_csr; 126 unsigned int __fp_pad; 127 } __fpregset_t; 128 #endif /* !(__mips_n32 || _LP64) */ 129 130 typedef struct { 131 __gregset_t __gregs; 132 __fpregset_t __fpregs; 133 } mcontext_t; 134 135 #endif /* !__ASSEMBLER__ */ 136 137 #define _UC_MACHINE_PAD 16 /* Padding appended to ucontext_t */ 138 139 /* 140 * Offsets relative to ucontext_t; intended to be used by assembly stubs. 141 */ 142 #if !defined(_MIPS_BSD_API) || _MIPS_BSD_API == _MIPS_BSD_API_LP32 143 #define _OFFSETOF_UC_GREGS 40 144 #else 145 #define _OFFSETOF_UC_GREGS 56 146 #endif 147 148 #define _UC_SETSTACK 0x00010000 149 #define _UC_CLRSTACK 0x00020000 150 151 #define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_SP]) 152 #define _UC_MACHINE_PC(uc) ((uc)->uc_mcontext.__gregs[_REG_EPC]) 153 #define _UC_MACHINE_INTRV(uc) ((uc)->uc_mcontext.__gregs[_REG_V0]) 154 155 #define _UC_MACHINE_SET_PC(uc, pc) _UC_MACHINE_PC(uc) = (pc) 156 157 #endif /* _MIPS_MCONTEXT_H_ */ 158