1 /* $NetBSD: mcontext.h,v 1.18 2014/05/12 22:50:03 uebayasi Exp $ */ 2 3 /*- 4 * Copyright (c) 1999 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 * 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 _AMD64_MCONTEXT_H_ 33 #define _AMD64_MCONTEXT_H_ 34 35 #ifdef __x86_64__ 36 37 #include <machine/frame_regs.h> 38 39 /* 40 * General register state 41 */ 42 #define GREG_OFFSETS(reg, REG, idx) _REG_##REG = idx, 43 enum { _FRAME_GREG(GREG_OFFSETS) _NGREG = 26 }; 44 #undef GREG_OFFSETS 45 46 typedef unsigned long __greg_t; 47 typedef __greg_t __gregset_t[_NGREG]; 48 49 /* These names are for compatibility */ 50 #define _REG_URSP _REG_RSP 51 #define _REG_RFL _REG_RFLAGS 52 53 /* 54 * Floating point register state 55 * The format of __fpregset_t is that of the fxsave instruction 56 * which requires 16 byte alignment. However the mcontext version 57 * is never directly accessed. 58 */ 59 typedef char __fpregset_t[512] __aligned(8); 60 61 typedef struct { 62 __gregset_t __gregs; 63 __greg_t _mc_tlsbase; 64 __fpregset_t __fpregs; 65 } mcontext_t; 66 67 #define _UC_UCONTEXT_ALIGN (~0xf) 68 69 /* AMD64 ABI 128-bytes "red zone". */ 70 #define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_RSP] - 128) 71 #define _UC_MACHINE_PC(uc) ((uc)->uc_mcontext.__gregs[_REG_RIP]) 72 #define _UC_MACHINE_INTRV(uc) ((uc)->uc_mcontext.__gregs[_REG_RAX]) 73 74 #define _UC_MACHINE_SET_PC(uc, pc) _UC_MACHINE_PC(uc) = (pc) 75 76 #define _UC_TLSBASE 0x00080000 77 78 /* 79 * mcontext extensions to handle signal delivery. 80 */ 81 #define _UC_SETSTACK 0x00010000 82 #define _UC_CLRSTACK 0x00020000 83 84 #define __UCONTEXT_SIZE 784 85 86 static __inline void * 87 __lwp_getprivate_fast(void) 88 { 89 void *__tmp; 90 91 __asm volatile("movq %%fs:0, %0" : "=r" (__tmp)); 92 93 return __tmp; 94 } 95 96 #ifdef _KERNEL 97 98 /* 99 * 32bit context definitions. 100 */ 101 102 #define _NGREG32 19 103 typedef unsigned int __greg32_t; 104 typedef __greg32_t __gregset32_t[_NGREG32]; 105 106 #define _REG32_GS 0 107 #define _REG32_FS 1 108 #define _REG32_ES 2 109 #define _REG32_DS 3 110 #define _REG32_EDI 4 111 #define _REG32_ESI 5 112 #define _REG32_EBP 6 113 #define _REG32_ESP 7 114 #define _REG32_EBX 8 115 #define _REG32_EDX 9 116 #define _REG32_ECX 10 117 #define _REG32_EAX 11 118 #define _REG32_TRAPNO 12 119 #define _REG32_ERR 13 120 #define _REG32_EIP 14 121 #define _REG32_CS 15 122 #define _REG32_EFL 16 123 #define _REG32_UESP 17 124 #define _REG32_SS 18 125 126 #define _UC_MACHINE32_SP(uc) ((uc)->uc_mcontext.__gregs[_REG32_UESP]) 127 128 /* 129 * Floating point register state 130 */ 131 typedef struct { 132 union { 133 struct { 134 int __fp_state[27]; /* Environment and registers */ 135 } __fpchip_state; 136 struct { 137 char __fp_xmm[512]; 138 } __fp_xmm_state; 139 } __fp_reg_set; 140 int __fp_pad[33]; /* Historic padding */ 141 } __fpregset32_t; 142 143 typedef struct { 144 __gregset32_t __gregs; 145 __fpregset32_t __fpregs; 146 uint32_t _mc_tlsbase; 147 } mcontext32_t; 148 149 #define _UC_FXSAVE 0x20 /* FP state is in FXSAVE format in XMM space */ 150 151 #define _UC_MACHINE32_PAD 4 152 #define __UCONTEXT32_SIZE 776 153 154 #endif /* _KERNEL */ 155 156 #else /* __x86_64__ */ 157 158 #include <i386/mcontext.h> 159 160 #endif /* __x86_64__ */ 161 162 #endif /* !_AMD64_MCONTEXT_H_ */ 163