1 /* $NetBSD: mcontext.h,v 1.12 2019/12/27 00:32:17 kamil Exp $ */
2
3 /*-
4 * Copyright (c) 2001 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 _SH3_MCONTEXT_H_
33 #define _SH3_MCONTEXT_H_
34
35 /*
36 * Layout of mcontext_t for the sh3 architecture.
37 */
38
39 #define _NGREG 22
40 typedef int __greg_t;
41 typedef __greg_t __gregset_t[_NGREG];
42
43 #define _REG_GBR 0
44 #define _REG_PC 1
45 #define _REG_SR 2
46 #define _REG_MACL 3
47 #define _REG_MACH 4
48 #define _REG_PR 5
49 #define _REG_R14 6
50 #define _REG_R13 7
51 #define _REG_R12 8
52 #define _REG_R11 9
53 #define _REG_R10 10
54 #define _REG_R9 11
55 #define _REG_R8 12
56 #define _REG_R7 13
57 #define _REG_R6 14
58 #define _REG_R5 15
59 #define _REG_R4 16
60 #define _REG_R3 17
61 #define _REG_R2 18
62 #define _REG_R1 19
63 #define _REG_R0 20
64 #define _REG_R15 21
65 /* Convenience synonym */
66 #define _REG_SP _REG_R15
67
68 /*
69 * FPU state description.
70 * XXX: kernel doesn't support FPU yet, so this is just a placeholder.
71 */
72 typedef struct {
73 int __fpr_fpscr;
74 int __fpr_fpul;
75 /* XXX: redefine as a union when we do support FPU */
76 int __fpr_regs[32]; /* SH3E has 16, SH4 has 32 */
77 } __fpregset_t;
78
79 typedef struct {
80 __gregset_t __gregs;
81 __fpregset_t __fpregs;
82 } mcontext_t;
83
84 #define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_SP])
85 #define _UC_MACHINE_FP(uc) ((uc)->uc_mcontext.__gregs[_REG_R14])
86 #define _UC_MACHINE_PC(uc) ((uc)->uc_mcontext.__gregs[_REG_PC])
87 #define _UC_MACHINE_INTRV(uc) ((uc)->uc_mcontext.__gregs[_REG_R0])
88
89 #define _UC_MACHINE_SET_PC(uc, pc) _UC_MACHINE_PC(uc) = (pc)
90
91 /*
92 * Machine dependent uc_flags
93 */
94 #define _UC_SETSTACK 0x10000
95 #define _UC_CLRSTACK 0x20000
96 #define _UC_TLSBASE 0x80000
97
98 #if defined(_RTLD_SOURCE) || defined(_LIBC_SOURCE) || \
99 defined(__LIBPTHREAD_SOURCE__)
100 #include <sys/tls.h>
101
102 __BEGIN_DECLS
103 static __inline void *
__lwp_getprivate_fast(void)104 __lwp_getprivate_fast(void)
105 {
106 register void *__gbr;
107
108 __asm volatile("stc gbr, %0" : "=r" (__gbr));
109
110 return __gbr;
111 }
112 __END_DECLS
113
114 #endif
115
116 #endif /* !_SH3_MCONTEXT_H_ */
117