1 /* $NetBSD: mcontext.h,v 1.2 2003/01/17 23:10:28 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 * Layout of mcontext_t according to the System V Application Binary Interface, 44 * Intel386(tm) Architecture Processor Supplement, Fourth Edition. 45 */ 46 47 /* 48 * General register state 49 */ 50 #define _NGREG 19 51 typedef int __greg_t; 52 typedef __greg_t __gregset_t[_NGREG]; 53 54 #define _REG_GS 0 55 #define _REG_FS 1 56 #define _REG_ES 2 57 #define _REG_DS 3 58 #define _REG_EDI 4 59 #define _REG_ESI 5 60 #define _REG_EBP 6 61 #define _REG_ESP 7 62 #define _REG_EBX 8 63 #define _REG_EDX 9 64 #define _REG_ECX 10 65 #define _REG_EAX 11 66 #define _REG_TRAPNO 12 67 #define _REG_ERR 13 68 #define _REG_EIP 14 69 #define _REG_CS 15 70 #define _REG_EFL 16 71 #define _REG_UESP 17 72 #define _REG_SS 18 73 74 /* 75 * Floating point register state 76 */ 77 typedef struct { 78 union { 79 struct { 80 int __fp_state[27]; /* Environment and registers */ 81 int __fp_status; /* Software status word */ 82 } __fpchip_state; 83 struct { 84 char __fp_emul[246]; 85 char __fp_epad[2]; 86 } __fp_emul_space; 87 struct { 88 char __fp_xmm[512]; 89 } __fp_xmm_state; 90 int __fp_fpregs[128]; 91 } __fp_reg_set; 92 long __fp_wregs[33]; /* Weitek? */ 93 } __fpregset_t; 94 95 typedef struct { 96 __gregset_t __gregs; 97 __fpregset_t __fpregs; 98 } mcontext_t; 99 100 #define _UC_FXSAVE 0x20 /* FP state is in FXSAVE format in XMM space */ 101 102 #define _UC_MACHINE_PAD 5 /* Padding appended to ucontext_t */ 103 104 #define _UC_UCONTEXT_ALIGN (~0xf) 105 106 #ifdef _KERNEL 107 #define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_UESP]) 108 #endif 109 110 #endif /* !_I386_MCONTEXT_H_ */ 111