1 /* $NetBSD: mcontext.h,v 1.15 2019/12/27 00:32:17 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 _I386_MCONTEXT_H_
33 #define _I386_MCONTEXT_H_
34
35
36 /*
37 * mcontext extensions to handle signal delivery.
38 */
39 #define _UC_SETSTACK 0x00010000
40 #define _UC_CLRSTACK 0x00020000
41 #define _UC_VM 0x00040000
42 #define _UC_TLSBASE 0x00080000
43
44 /*
45 * Layout of mcontext_t according to the System V Application Binary Interface,
46 * Intel386(tm) Architecture Processor Supplement, Fourth Edition.
47 */
48
49 /*
50 * General register state
51 */
52 #define _NGREG 19
53 typedef int __greg_t;
54 typedef __greg_t __gregset_t[_NGREG];
55
56 #define _REG_GS 0
57 #define _REG_FS 1
58 #define _REG_ES 2
59 #define _REG_DS 3
60 #define _REG_EDI 4
61 #define _REG_ESI 5
62 #define _REG_EBP 6
63 #define _REG_ESP 7
64 #define _REG_EBX 8
65 #define _REG_EDX 9
66 #define _REG_ECX 10
67 #define _REG_EAX 11
68 #define _REG_TRAPNO 12
69 #define _REG_ERR 13
70 #define _REG_EIP 14
71 #define _REG_CS 15
72 #define _REG_EFL 16
73 #define _REG_UESP 17
74 #define _REG_SS 18
75
76 /*
77 * Floating point register state
78 */
79 typedef struct {
80 union {
81 struct {
82 int __fp_state[27]; /* Environment and registers */
83 } __fpchip_state; /* x87 regs in fsave format */
84 struct {
85 char __fp_xmm[512];
86 } __fp_xmm_state; /* x87 and xmm regs in fxsave format */
87 int __fp_fpregs[128];
88 } __fp_reg_set;
89 int __fp_pad[33]; /* Historic padding */
90 } __fpregset_t;
91 __CTASSERT(sizeof (__fpregset_t) == 512 + 33 * 4);
92
93 typedef struct {
94 __gregset_t __gregs;
95 __fpregset_t __fpregs;
96 __greg_t _mc_tlsbase;
97 } mcontext_t;
98
99 #define _UC_FXSAVE 0x20 /* FP state is in FXSAVE format in XMM space */
100
101 #define _UC_MACHINE_PAD 4 /* Padding appended to ucontext_t */
102
103 #define _UC_UCONTEXT_ALIGN (~0xf)
104
105 #ifndef _UC_MACHINE_SP
106 #define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_UESP])
107 #endif
108 #define _UC_MACHINE_FP(uc) ((uc)->uc_mcontext.__gregs[_REG_EBP])
109 #define _UC_MACHINE_PC(uc) ((uc)->uc_mcontext.__gregs[_REG_EIP])
110 #define _UC_MACHINE_INTRV(uc) ((uc)->uc_mcontext.__gregs[_REG_EAX])
111
112 #define _UC_MACHINE_SET_PC(uc, pc) _UC_MACHINE_PC(uc) = (pc)
113
114 #define __UCONTEXT_SIZE 776
115
116 #if defined(_RTLD_SOURCE) || defined(_LIBC_SOURCE) || \
117 defined(__LIBPTHREAD_SOURCE__)
118 #include <sys/tls.h>
119
120 __BEGIN_DECLS
121 static __inline void *
__lwp_getprivate_fast(void)122 __lwp_getprivate_fast(void)
123 {
124 void *__tmp;
125
126 __asm volatile("movl %%gs:0, %0" : "=r" (__tmp));
127
128 return __tmp;
129 }
130 __END_DECLS
131
132 #endif
133
134 #endif /* !_I386_MCONTEXT_H_ */
135