1/* $NetBSD: mcontext.h,v 1.18 2011/07/03 10:34:25 mrg 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#ifndef _MIPS_MCONTEXT_H_ 33#define _MIPS_MCONTEXT_H_ 34 35/* 36 * General register state 37 */ 38#define _NGREG 37 /* R0-R31, MDLO, MDHI, CAUSE, PC, SR */ 39 40#define _REG_R0 0 41#define _REG_AT 1 42#define _REG_V0 2 43#define _REG_V1 3 44#define _REG_A0 4 45#define _REG_A1 5 46#define _REG_A2 6 47#define _REG_A3 7 48#define _REG_T0 8 49#define _REG_T1 9 50#define _REG_T2 10 51#define _REG_T3 11 52#define _REG_T4 12 53#define _REG_T5 13 54#define _REG_T6 14 55#define _REG_T7 15 56#define _REG_S0 16 57#define _REG_S1 17 58#define _REG_S2 18 59#define _REG_S3 19 60#define _REG_S4 20 61#define _REG_S5 21 62#define _REG_S6 22 63#define _REG_S7 23 64#define _REG_T8 24 65#define _REG_T9 25 66#define _REG_K0 26 67#define _REG_K1 27 68#define _REG_GP 28 69#define _REG_SP 29 70#define _REG_S8 30 71#define _REG_RA 31 72 73/* XXX: The following conflict with <mips/regnum.h> */ 74#define _REG_MDLO 32 75#define _REG_MDHI 33 76#define _REG_CAUSE 34 77#define _REG_EPC 35 78#define _REG_SR 36 79 80#ifndef __ASSEMBLER__ 81 82/* Make sure this is signed; we need pointers to be sign-extended. */ 83#if defined(__mips_n32) 84typedef long long __greg_t; 85#else 86typedef long __greg_t; 87#endif /* __mips_n32 */ 88 89typedef __greg_t __gregset_t[_NGREG]; 90 91/* 92 * For the O32/O64 ABI, there are 16 doubles, one at each even FP reg 93 * number. The FP registers themselves are 32-bits. 94 * 95 * For 64-bit ABIs (include N32), each FP register is a 64-bit double. 96 */ 97typedef __greg_t __freg_t; 98 99/* 100 * Floating point register state 101 */ 102struct __fpregset_nabi { 103 union { 104 double __fp64_dregs[32]; 105 __freg_t __fp_regs[32]; 106 } __fp_r; 107 __greg_t __fp_csr; 108}; 109struct __fpregset_oabi { 110 union { 111 double __fp_dregs[16]; 112 float __fp_fregs[32]; 113 __int32_t __fp_regs[32]; 114 } __fp_r; 115 unsigned int __fp_csr; 116 unsigned int __fp_pad; 117}; 118 119#if __mips_n32 || __mips_n64 120typedef struct __fpregset_nabi __fpregset_t; 121#else 122typedef struct __fpregset_oabi __fpregset_t; 123#endif 124 125typedef struct { 126 __gregset_t __gregs; 127 __fpregset_t __fpregs; 128 __greg_t _mc_tlsbase; 129#if !__mips_n32 130 __greg_t __mc_unused; 131#endif 132} mcontext_t; 133 134#if defined(_KERNEL) && !defined(__mips_o32) 135typedef __int32_t __greg32_t; 136typedef __greg32_t __gregset32_t[_NGREG]; 137 138typedef struct { 139 __gregset32_t __gregs; 140 struct __fpregset_oabi __fpregs; 141 __greg32_t _mc_tlsbase; 142 __greg32_t __mc_unused; 143} mcontext_o32_t; 144 145typedef struct { 146 __gregset_t __gregs; 147 struct __fpregset_nabi __fpregs; 148 __greg_t _mc_tlsbase; 149} mcontext32_t; 150 151#endif /* _KERNEL && _LP64 */ 152 153#endif /* !__ASSEMBLER__ */ 154 155#define _UC_MACHINE_PAD 14 /* Padding appended to ucontext_t */ 156 157#define _UC_SETSTACK 0x00010000 158#define _UC_CLRSTACK 0x00020000 159#define _UC_TLSBASE 0x00040000 160 161#define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_SP]) 162#define _UC_MACHINE_PC(uc) ((uc)->uc_mcontext.__gregs[_REG_EPC]) 163#define _UC_MACHINE_INTRV(uc) ((uc)->uc_mcontext.__gregs[_REG_V0]) 164 165#define _UC_MACHINE_SET_PC(uc, pc) _UC_MACHINE_PC(uc) = (pc) 166 167#define _UC_MACHINE32_SP(uc) _UC_MACHINE_SP(uc) 168#define _UC_MACHINE32_PC(uc) _UC_MACHINE_PC(uc) 169#define _UC_MACHINE32_INTRV(uc) _UC_MACHINE_INTRV(uc) 170#define _UC_MACHINE32_PAD 14 /* Padding appended to ucontext32_t */ 171 172#define _UC_MACHINE32_SET_PC(uc, pc) _UC_MACHINE_PC((uc), (pc)) 173 174#define __UCONTEXT_SIZE_O32 (40 + 296 + 56) /* 392 */ 175#define __UCONTEXT_SIZE_N32 (40 + 568 + 56) /* 664 */ 176#define __UCONTEXT_SIZE_N64 (56 + 576 + 112) /* 774 */ 177 178#ifdef __mips_o32 179#define __UCONTEXT_SIZE __UCONTEXT_SIZE_O32 180#elif __mips_n32 181#define __UCONTEXT_SIZE __UCONTEXT_SIZE_N32 182#elif __mips_n64 183#define __UCONTEXT_SIZE __UCONTEXT_SIZE_N64 184#define __UCONTEXT32_SIZE __UCONTEXT_SIZE_N32 185#else 186#error O64 is not supported 187#endif 188 189#if defined(_LIBC_SOURCE) || defined(_RTLD_SOURCE) || defined(__LIBPTHREAD_SOURCE__) 190#define TLS_TP_OFFSET 0x7000 191#define TLS_DTV_OFFSET 0x8000 192 193#include <sys/tls.h> 194 195__CTASSERT(TLS_TP_OFFSET + sizeof(struct tls_tcb) < 0x8000); 196__CTASSERT(TLS_TP_OFFSET % sizeof(struct tls_tcb) == 0); 197 198static __inline struct tls_tcb * 199__lwp_gettcb_fast(void) 200{ 201 struct tls_tcb *__tcb; 202 203 /* 204 * Only emit a rdhwr $3, $29 so the kernel can quickly emulate it. 205 */ 206 __asm __volatile(".set push; .set mips32r2; " 207 "rdhwr $3,$29; .set pop;" 208#ifdef _LP64 209 "daddiu %[__tcb],$3,%1" 210#else 211 "addiu %[__tcb],$3,%1" 212#endif 213 : [__tcb]"=r"(__tcb) 214 : [__offset]"n"(-(TLS_TP_OFFSET + sizeof(*__tcb))) 215 : "v1"); 216 return __tcb; 217} 218 219void _lwp_setprivate(void *); 220 221static inline void 222__lwp_settcb(struct tls_tcb *__tcb) 223{ 224 __tcb += TLS_TP_OFFSET / sizeof(*__tcb) + 1; 225 _lwp_setprivate(__tcb); 226} 227#endif 228 229#endif /* _MIPS_MCONTEXT_H_ */ 230