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mcontext.h revision 1.6 
      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