1 /* $NetBSD: mcontext.h,v 1.7 2008/04/28 20:23:24 martin 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 43 /* 44 * Layout of mcontext_t according to the System V Application Binary Interface, 45 * Intel386(tm) Architecture Processor Supplement, Fourth Edition. 46 */ 47 48 /* 49 * General register state 50 */ 51 #define _NGREG 19 52 typedef int __greg_t; 53 typedef __greg_t __gregset_t[_NGREG]; 54 55 #define _REG_GS 0 56 #define _REG_FS 1 57 #define _REG_ES 2 58 #define _REG_DS 3 59 #define _REG_EDI 4 60 #define _REG_ESI 5 61 #define _REG_EBP 6 62 #define _REG_ESP 7 63 #define _REG_EBX 8 64 #define _REG_EDX 9 65 #define _REG_ECX 10 66 #define _REG_EAX 11 67 #define _REG_TRAPNO 12 68 #define _REG_ERR 13 69 #define _REG_EIP 14 70 #define _REG_CS 15 71 #define _REG_EFL 16 72 #define _REG_UESP 17 73 #define _REG_SS 18 74 75 /* 76 * Floating point register state 77 */ 78 typedef struct { 79 union { 80 struct { 81 int __fp_state[27]; /* Environment and registers */ 82 int __fp_status; /* Software status word */ 83 } __fpchip_state; 84 struct { 85 char __fp_emul[246]; 86 char __fp_epad[2]; 87 } __fp_emul_space; 88 struct { 89 char __fp_xmm[512]; 90 } __fp_xmm_state; 91 int __fp_fpregs[128]; 92 } __fp_reg_set; 93 long __fp_wregs[33]; /* Weitek? */ 94 } __fpregset_t; 95 96 typedef struct { 97 __gregset_t __gregs; 98 __fpregset_t __fpregs; 99 } mcontext_t; 100 101 #define _UC_FXSAVE 0x20 /* FP state is in FXSAVE format in XMM space */ 102 103 #define _UC_MACHINE_PAD 5 /* Padding appended to ucontext_t */ 104 105 #define _UC_UCONTEXT_ALIGN (~0xf) 106 107 #ifdef _KERNEL_OPT 108 #include "opt_vm86.h" 109 #ifdef VM86 110 /*#include <machine/psl.h>*/ 111 #define PSL_VM 0x00020000 112 #define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_UESP] + \ 113 ((uc)->uc_mcontext.__gregs[_REG_EFL] & PSL_VM ? \ 114 ((uc)->uc_mcontext.__gregs[_REG_SS] << 4) : 0)) 115 #endif /* VM86 */ 116 #endif /* _KERNEL_OPT */ 117 118 #ifndef _UC_MACHINE_SP 119 #define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_UESP]) 120 #endif 121 #define _UC_MACHINE_PC(uc) ((uc)->uc_mcontext.__gregs[_REG_EIP]) 122 #define _UC_MACHINE_INTRV(uc) ((uc)->uc_mcontext.__gregs[_REG_EAX]) 123 124 #define _UC_MACHINE_SET_PC(uc, pc) _UC_MACHINE_PC(uc) = (pc) 125 126 #endif /* !_I386_MCONTEXT_H_ */ 127