1 /* $NetBSD: mcontext.h,v 1.6 2003/10/08 22:43:01 thorpej 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 * 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 _I386_MCONTEXT_H_ 40 #define _I386_MCONTEXT_H_ 41 42 43 /* 44 * mcontext extensions to handle signal delivery. 45 */ 46 #define _UC_SETSTACK 0x00010000 47 #define _UC_CLRSTACK 0x00020000 48 #define _UC_VM 0x00040000 49 50 /* 51 * Layout of mcontext_t according to the System V Application Binary Interface, 52 * Intel386(tm) Architecture Processor Supplement, Fourth Edition. 53 */ 54 55 /* 56 * General register state 57 */ 58 #define _NGREG 19 59 typedef int __greg_t; 60 typedef __greg_t __gregset_t[_NGREG]; 61 62 #define _REG_GS 0 63 #define _REG_FS 1 64 #define _REG_ES 2 65 #define _REG_DS 3 66 #define _REG_EDI 4 67 #define _REG_ESI 5 68 #define _REG_EBP 6 69 #define _REG_ESP 7 70 #define _REG_EBX 8 71 #define _REG_EDX 9 72 #define _REG_ECX 10 73 #define _REG_EAX 11 74 #define _REG_TRAPNO 12 75 #define _REG_ERR 13 76 #define _REG_EIP 14 77 #define _REG_CS 15 78 #define _REG_EFL 16 79 #define _REG_UESP 17 80 #define _REG_SS 18 81 82 /* 83 * Floating point register state 84 */ 85 typedef struct { 86 union { 87 struct { 88 int __fp_state[27]; /* Environment and registers */ 89 int __fp_status; /* Software status word */ 90 } __fpchip_state; 91 struct { 92 char __fp_emul[246]; 93 char __fp_epad[2]; 94 } __fp_emul_space; 95 struct { 96 char __fp_xmm[512]; 97 } __fp_xmm_state; 98 int __fp_fpregs[128]; 99 } __fp_reg_set; 100 long __fp_wregs[33]; /* Weitek? */ 101 } __fpregset_t; 102 103 typedef struct { 104 __gregset_t __gregs; 105 __fpregset_t __fpregs; 106 } mcontext_t; 107 108 #define _UC_FXSAVE 0x20 /* FP state is in FXSAVE format in XMM space */ 109 110 #define _UC_MACHINE_PAD 5 /* Padding appended to ucontext_t */ 111 112 #define _UC_UCONTEXT_ALIGN (~0xf) 113 114 #ifdef _KERNEL_OPT 115 #include "opt_vm86.h" 116 #ifdef VM86 117 /*#include <machine/psl.h>*/ 118 #define PSL_VM 0x00020000 119 #define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_UESP] + \ 120 ((uc)->uc_mcontext.__gregs[_REG_EFL] & PSL_VM ? \ 121 ((uc)->uc_mcontext.__gregs[_REG_SS] << 4) : 0)) 122 #endif /* VM86 */ 123 #endif /* _KERNEL_OPT */ 124 125 #ifndef _UC_MACHINE_SP 126 #define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_UESP]) 127 #endif 128 #define _UC_MACHINE_PC(uc) ((uc)->uc_mcontext.__gregs[_REG_EIP]) 129 #define _UC_MACHINE_INTRV(uc) ((uc)->uc_mcontext.__gregs[_REG_EAX]) 130 131 #define _UC_MACHINE_SET_PC(uc, pc) _UC_MACHINE_PC(uc) = (pc) 132 133 #endif /* !_I386_MCONTEXT_H_ */ 134