mcontext.h revision 1.2 
1/* $NetBSD: mcontext.h,v 1.2 2018/02/15 15:53:56 kamil Exp $ */
2
3/*-
4 * Copyright (c) 2014 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Matt Thomas of 3am Software Foundry.
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#ifndef _AARCH64_MCONTEXT_H_
32#define _AARCH64_MCONTEXT_H_
33
34#ifdef __aarch64__
35
36/*
37 * Layout of mcontext_t based on the System V Application Binary Interface,
38 * Edition 4.1, PowerPC Processor ABI Supplement - September 1995, and
39 * extended for the AltiVec Register File.  Note that due to the increased
40 * alignment requirements of the latter, the offset of mcontext_t within
41 * an ucontext_t is different from System V.
42 */
43
44#define	_NGREG	35		/* GR0-30, SP, PC, APSR, TPIDR */
45
46typedef	__int64_t	__greg_t;
47typedef	__greg_t	__gregset_t[_NGREG];
48
49#define	_REG_X0		0
50#define	_REG_X1		1
51#define	_REG_X2		2
52#define	_REG_X3		3
53#define	_REG_X4		4
54#define	_REG_X5		5
55#define	_REG_X6		6
56#define	_REG_X7		7
57#define	_REG_X8		8
58#define	_REG_X9		9
59#define	_REG_X10	10
60#define	_REG_X11	11
61#define	_REG_X12	12
62#define	_REG_X13	13
63#define	_REG_X14	14
64#define	_REG_X15	15
65#define	_REG_X16	16
66#define	_REG_X17	17
67#define	_REG_X18	18
68#define	_REG_X19	19
69#define	_REG_X20	20
70#define	_REG_X21	21
71#define	_REG_X22	22
72#define	_REG_X23	23
73#define	_REG_X24	24
74#define	_REG_X25	25
75#define	_REG_X26	26
76#define	_REG_X27	27
77#define	_REG_X28	28
78#define	_REG_X29	29
79#define	_REG_X30	30
80#define	_REG_SP		31
81#define	_REG_PC		32
82#define	_REG_SPSR	33
83#define	_REG_TPIDR	34
84
85#define	_NFREG	32			/* Number of SIMD registers */
86
87typedef struct {
88	union __freg {
89		__uint8_t	__b8[16];
90		__uint16_t	__h16[8];
91		__uint32_t	__s32[4];
92		__uint64_t	__d64[2];
93		__uint128_t	__q128[1];
94	} 	__qregs[_NFREG] __aligned(16);
95	__uint32_t	__fpcr;		/* FPCR */
96	__uint32_t	__fpsr;		/* FPSR */
97} __fregset_t;
98
99typedef struct {
100	__gregset_t	__gregs;	/* General Purpose Register set */
101	__fregset_t	__fregs;	/* FPU/SIMD Register File */
102	__greg_t	__spare[8];	/* future proof */
103} mcontext_t;
104
105/* Machine-dependent uc_flags */
106#define	_UC_TLSBASE	0x00080000	/* see <sys/ucontext.h> */
107
108#define _UC_MACHINE_SP(uc)	((uc)->uc_mcontext.__gregs[_REG_SP])
109#define _UC_MACHINE_FP(uc)	((uc)->uc_mcontext.__gregs[_REG_X29])
110#define _UC_MACHINE_PC(uc)	((uc)->uc_mcontext.__gregs[_REG_PC])
111#define _UC_MACHINE_INTRV(uc)	((uc)->uc_mcontext.__gregs[_REG_X0])
112
113#define	_UC_MACHINE_SET_PC(uc, pc)	_UC_MACHINE_PC(uc) = (pc)
114
115#if defined(_RTLD_SOURCE) || defined(_LIBC_SOURCE) || defined(__LIBPTHREAD_SOURCE__)
116#include <sys/tls.h>
117
118static __inline void *
119__lwp_getprivate_fast(void)
120{
121	void *__tpidr;
122	__asm __volatile("mrs\t%0, tpidr_el0" : "=r"(__tpidr));
123	return __tpidr;
124}
125
126static __inline void *
127__lwp_gettcb_fast(void)
128{
129	void *__tpidr;
130	__asm __volatile("mrs\t%0, tpidr_el0" : "=r"(__tpidr));
131	return __tpidr;
132}
133
134static __inline void
135__lwp_settcb(void *__tcb)
136{
137	__asm __volatile("msr\ttpidr_el0, %0" :: "r"(__tcb));
138}
139#endif /* _RTLD_SOURCE || _LIBC_SOURCE || __LIBPTHREAD_SOURCE__ */
140
141#elif defined(__arm__)
142
143#include <arm/mcontext.h>
144
145#endif /* __aarch64__/__arm__ */
146
147#endif /* !_AARCH64_MCONTEXT_H_ */
148