1/* $NetBSD: mcontext.h,v 1.19 2018/02/15 15:53:56 kamil 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#ifdef __x86_64__
36
37#include <machine/frame_regs.h>
38
39/*
40 * General register state
41 */
42#define GREG_OFFSETS(reg, REG, idx) _REG_##REG = idx,
43enum { _FRAME_GREG(GREG_OFFSETS) _NGREG = 26 };
44#undef GREG_OFFSETS
45
46typedef unsigned long __greg_t;
47typedef __greg_t __gregset_t[_NGREG];
48
49/* These names are for compatibility */
50#define _REG_URSP _REG_RSP
51#define _REG_RFL _REG_RFLAGS
52
53/*
54 * Floating point register state
55 * The format of __fpregset_t is that of the fxsave instruction
56 * which requires 16 byte alignment. However the mcontext version
57 * is never directly accessed.
58 */
59typedef char __fpregset_t[512] __aligned(8);
60
61typedef struct {
62 __gregset_t __gregs;
63 __greg_t _mc_tlsbase;
64 __fpregset_t __fpregs;
65} mcontext_t;
66
67#define _UC_UCONTEXT_ALIGN (~0xf)
68
69/* AMD64 ABI 128-bytes "red zone". */
70#define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_RSP] - 128)
71#define _UC_MACHINE_FP(uc) ((uc)->uc_mcontext.__gregs[_REG_RBP])
72#define _UC_MACHINE_PC(uc) ((uc)->uc_mcontext.__gregs[_REG_RIP])
73#define _UC_MACHINE_INTRV(uc) ((uc)->uc_mcontext.__gregs[_REG_RAX])
74
75#define _UC_MACHINE_SET_PC(uc, pc) _UC_MACHINE_PC(uc) = (pc)
76
77#define _UC_TLSBASE 0x00080000
78
79/*
80 * mcontext extensions to handle signal delivery.
81 */
82#define _UC_SETSTACK 0x00010000
83#define _UC_CLRSTACK 0x00020000
84
85#define __UCONTEXT_SIZE 784
86
87static __inline void *
88__lwp_getprivate_fast(void)
89{
90 void *__tmp;
91
92 __asm volatile("movq %%fs:0, %0" : "=r" (__tmp));
93
94 return __tmp;
95}
96
97#ifdef _KERNEL
98
99/*
100 * 32bit context definitions.
101 */
102
103#define _NGREG32 19
104typedef unsigned int __greg32_t;
105typedef __greg32_t __gregset32_t[_NGREG32];
106
107#define _REG32_GS 0
108#define _REG32_FS 1
109#define _REG32_ES 2
110#define _REG32_DS 3
111#define _REG32_EDI 4
112#define _REG32_ESI 5
113#define _REG32_EBP 6
114#define _REG32_ESP 7
115#define _REG32_EBX 8
116#define _REG32_EDX 9
117#define _REG32_ECX 10
118#define _REG32_EAX 11
119#define _REG32_TRAPNO 12
120#define _REG32_ERR 13
121#define _REG32_EIP 14
122#define _REG32_CS 15
123#define _REG32_EFL 16
124#define _REG32_UESP 17
125#define _REG32_SS 18
126
127#define _UC_MACHINE32_SP(uc) ((uc)->uc_mcontext.__gregs[_REG32_UESP])
128
129/*
130 * Floating point register state
131 */
132typedef struct {
133 union {
134 struct {
135 int __fp_state[27]; /* Environment and registers */
136 } __fpchip_state;
137 struct {
138 char __fp_xmm[512];
139 } __fp_xmm_state;
140 } __fp_reg_set;
141 int __fp_pad[33]; /* Historic padding */
142} __fpregset32_t;
143
144typedef struct {
145 __gregset32_t __gregs;
146 __fpregset32_t __fpregs;
147 uint32_t _mc_tlsbase;
148} mcontext32_t;
149
150#define _UC_FXSAVE 0x20 /* FP state is in FXSAVE format in XMM space */
151
152#define _UC_MACHINE32_PAD 4
153#define __UCONTEXT32_SIZE 776
154
155#endif /* _KERNEL */
156
157#else /* __x86_64__ */
158
159#include <i386/mcontext.h>
160
161#endif /* __x86_64__ */
162
163#endif /* !_AMD64_MCONTEXT_H_ */
164