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mcontext.h revision 1.9.6.1 
      1 /*	$NetBSD: mcontext.h,v 1.9.6.1 2008/06/02 13:21:49 mjf 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 _AMD64_MCONTEXT_H_
     33 #define _AMD64_MCONTEXT_H_
     34 
     35 #include <machine/frame_regs.h>
     36 
     37 /*
     38  * General register state
     39  */
     40 #define GREG_OFFSETS(reg, REG, idx) _REG_##REG = idx,
     41 enum { _FRAME_GREG(GREG_OFFSETS) _NGREG = 26 };
     42 #undef GREG_OFFSETS
     43 
     44 typedef	unsigned long	__greg_t;
     45 typedef	__greg_t	__gregset_t[_NGREG];
     46 
     47 /* These names are for compatibility */
     48 #define	_REG_URSP	_REG_RSP
     49 #define	_REG_RFL	_REG_RFLAGS
     50 
     51 /*
     52  * Floating point register state
     53  */
     54 typedef char __fpregset_t[512];
     55 
     56 /*
     57  * The padding below is to make __fpregs have a 16-byte aligned offset
     58  * within ucontext_t.
     59  */
     60 
     61 typedef struct {
     62 	__gregset_t	__gregs;
     63 	long 		__pad;
     64 	__fpregset_t	__fpregs;
     65 } mcontext_t;
     66 
     67 #define _UC_UCONTEXT_ALIGN	(~0xf)
     68 
     69 #define _UC_MACHINE_SP(uc)	((uc)->uc_mcontext.__gregs[_REG_RSP] - 128)
     70 #define _UC_MACHINE_PC(uc)	((uc)->uc_mcontext.__gregs[_REG_RIP])
     71 #define _UC_MACHINE_INTRV(uc)	((uc)->uc_mcontext.__gregs[_REG_RAX])
     72 
     73 #define	_UC_MACHINE_SET_PC(uc, pc)	_UC_MACHINE_PC(uc) = (pc)
     74 
     75 /*
     76  * mcontext extensions to handle signal delivery.
     77  */
     78 #define _UC_SETSTACK	0x00010000
     79 #define _UC_CLRSTACK	0x00020000
     80 
     81 
     82 #ifdef _KERNEL
     83 
     84 /*
     85  * 32bit context definitions.
     86  */
     87 
     88 #define _NGREG32	19
     89 typedef unsigned int	__greg32_t;
     90 typedef __greg32_t	__gregset32_t[_NGREG32];
     91 
     92 #define _REG32_GS	0
     93 #define _REG32_FS	1
     94 #define _REG32_ES	2
     95 #define _REG32_DS	3
     96 #define _REG32_EDI	4
     97 #define _REG32_ESI	5
     98 #define _REG32_EBP	6
     99 #define _REG32_ESP	7
    100 #define _REG32_EBX	8
    101 #define _REG32_EDX	9
    102 #define _REG32_ECX	10
    103 #define _REG32_EAX	11
    104 #define _REG32_TRAPNO	12
    105 #define _REG32_ERR	13
    106 #define _REG32_EIP	14
    107 #define _REG32_CS	15
    108 #define _REG32_EFL	16
    109 #define _REG32_UESP	17
    110 #define _REG32_SS	18
    111 
    112 #define _UC_MACHINE32_SP(uc)	((uc)->uc_mcontext.__gregs[_REG32_UESP])
    113 
    114 /*
    115  * Floating point register state
    116  */
    117 typedef struct fxsave64 __fpregset32_t;
    118 
    119 typedef struct {
    120 	__gregset32_t	__gregs;
    121 	__fpregset32_t	__fpregs;
    122 } mcontext32_t;
    123 
    124 #define _UC_MACHINE_PAD32	5
    125 
    126 struct trapframe;
    127 struct lwp;
    128 int check_mcontext(struct lwp *, const mcontext_t *, struct trapframe *);
    129 
    130 #endif /* _KERNEL */
    131 
    132 #endif	/* !_AMD64_MCONTEXT_H_ */
    133