1 /* $NetBSD: mcontext.h,v 1.10 2011/02/25 14:07:13 joerg 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 _I386_MCONTEXT_H_ 33 #define _I386_MCONTEXT_H_ 34 35 36 /* 37 * mcontext extensions to handle signal delivery. 38 */ 39 #define _UC_SETSTACK 0x00010000 40 #define _UC_CLRSTACK 0x00020000 41 #define _UC_VM 0x00040000 42 #define _UC_TLSBASE 0x00080000 43 44 /* 45 * Layout of mcontext_t according to the System V Application Binary Interface, 46 * Intel386(tm) Architecture Processor Supplement, Fourth Edition. 47 */ 48 49 /* 50 * General register state 51 */ 52 #define _NGREG 19 53 typedef int __greg_t; 54 typedef __greg_t __gregset_t[_NGREG]; 55 56 #define _REG_GS 0 57 #define _REG_FS 1 58 #define _REG_ES 2 59 #define _REG_DS 3 60 #define _REG_EDI 4 61 #define _REG_ESI 5 62 #define _REG_EBP 6 63 #define _REG_ESP 7 64 #define _REG_EBX 8 65 #define _REG_EDX 9 66 #define _REG_ECX 10 67 #define _REG_EAX 11 68 #define _REG_TRAPNO 12 69 #define _REG_ERR 13 70 #define _REG_EIP 14 71 #define _REG_CS 15 72 #define _REG_EFL 16 73 #define _REG_UESP 17 74 #define _REG_SS 18 75 76 /* 77 * Floating point register state 78 */ 79 typedef struct { 80 union { 81 struct { 82 int __fp_state[27]; /* Environment and registers */ 83 int __fp_status; /* Software status word */ 84 } __fpchip_state; 85 struct { 86 char __fp_emul[246]; 87 char __fp_epad[2]; 88 } __fp_emul_space; 89 struct { 90 char __fp_xmm[512]; 91 } __fp_xmm_state; 92 int __fp_fpregs[128]; 93 } __fp_reg_set; 94 long __fp_wregs[33]; /* Weitek? */ 95 } __fpregset_t; 96 97 typedef struct { 98 __gregset_t __gregs; 99 __fpregset_t __fpregs; 100 __greg_t _mc_tlsbase; 101 #ifdef __minix 102 int mc_magic; 103 int mc_flags; 104 #endif 105 } mcontext_t; 106 107 #define _UC_FXSAVE 0x20 /* FP state is in FXSAVE format in XMM space */ 108 109 #define _UC_MACHINE_PAD 4 /* Padding appended to ucontext_t */ 110 111 #define _UC_UCONTEXT_ALIGN (~0xf) 112 113 #ifdef _KERNEL_OPT 114 #include "opt_vm86.h" 115 #ifdef VM86 116 /*#include <machine/psl.h>*/ 117 #define PSL_VM 0x00020000 118 #define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_UESP] + \ 119 ((uc)->uc_mcontext.__gregs[_REG_EFL] & PSL_VM ? \ 120 ((uc)->uc_mcontext.__gregs[_REG_SS] << 4) : 0)) 121 #endif /* VM86 */ 122 #endif /* _KERNEL_OPT */ 123 124 #ifndef _UC_MACHINE_SP 125 #define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_UESP]) 126 #endif 127 #define _UC_MACHINE_PC(uc) ((uc)->uc_mcontext.__gregs[_REG_EIP]) 128 #define _UC_MACHINE_INTRV(uc) ((uc)->uc_mcontext.__gregs[_REG_EAX]) 129 130 #define _UC_MACHINE_SET_PC(uc, pc) _UC_MACHINE_PC(uc) = (pc) 131 132 #if defined(__minix) 133 #define _UC_MACHINE_STACK(uc) ((uc)->uc_mcontext.__gregs[_REG_ESP]) 134 #define _UC_MACHINE_SET_STACK(uc, esp) _UC_MACHINE_STACK(uc) = (esp) 135 136 #define _UC_MACHINE_EBP(uc) ((uc)->uc_mcontext.__gregs[_REG_EBP]) 137 #define _UC_MACHINE_SET_EBP(uc, ebp) _UC_MACHINE_EBP(uc) = (ebp) 138 139 #define _UC_MACHINE_ESI(uc) ((uc)->uc_mcontext.__gregs[_REG_ESI]) 140 #define _UC_MACHINE_SET_ESI(uc, esi) _UC_MACHINE_ESI(uc) = (esi) 141 142 int setmcontext(const mcontext_t *mcp); 143 int getmcontext(mcontext_t *mcp); 144 145 #define MCF_MAGIC 0xc0ffee 146 #define _MC_FPU_SAVED 0x001 147 148 #endif /* defined(__minix) */ 149 150 #define __UCONTEXT_SIZE 776 151 152 static __inline void * 153 __lwp_getprivate_fast(void) 154 { 155 void *__tmp; 156 157 __asm volatile("movl %%gs:0, %0" : "=r" (__tmp)); 158 159 return __tmp; 160 } 161 162 #endif /* !_I386_MCONTEXT_H_ */ 163