1 /* $NetBSD: mcontext.h,v 1.12 2020/10/04 10:34:18 rin 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 _M68K_MCONTEXT_H_
33 #define _M68K_MCONTEXT_H_
34
35 #ifdef _KERNEL
36 #include <m68k/cpuframe.h>
37 #endif
38
39 /*
40 * mcontext extensions to handle signal delivery.
41 */
42 #define _UC_SETSTACK 0x00010000
43 #define _UC_CLRSTACK 0x00020000
44
45 /*
46 * General register state
47 */
48 #define _NGREG 18
49 typedef int __greg_t;
50 typedef __greg_t __gregset_t[_NGREG];
51
52 #define _REG_D0 0
53 #define _REG_D1 1
54 #define _REG_D2 2
55 #define _REG_D3 3
56 #define _REG_D4 4
57 #define _REG_D5 5
58 #define _REG_D6 6
59 #define _REG_D7 7
60 #define _REG_A0 8
61 #define _REG_A1 9
62 #define _REG_A2 10
63 #define _REG_A3 11
64 #define _REG_A4 12
65 #define _REG_A5 13
66 #define _REG_A6 14
67 #define _REG_A7 15
68 #define _REG_PC 16
69 #define _REG_PS 17
70
71 typedef struct {
72 int __fp_pcr;
73 int __fp_psr;
74 int __fp_piaddr;
75 int __fp_fpregs[8*3];
76 } __fpregset_t;
77
78 typedef struct {
79 __gregset_t __gregs; /* General Register set */
80 __fpregset_t __fpregs; /* Floating Point Register set */
81 union {
82 long __mc_state[201]; /* Only need 308 bytes... */
83 #if defined(_KERNEL) || defined(__M68K_MCONTEXT_PRIVATE)
84 struct {
85 /* Rest of the frame. */
86 unsigned int __mcf_format;
87 unsigned int __mcf_vector;
88 union F_u __mcf_exframe;
89 /* Rest of the FPU frame. */
90 union FPF_u1 __mcf_fpf_u1;
91 union FPF_u2 __mcf_fpf_u2;
92 } __mc_frame;
93 #endif /* _KERNEL || __M68K_MCONTEXT_PRIVATE */
94 } __mc_pad;
95 __greg_t _mc_tlsbase;
96 } mcontext_t;
97
98 /* Note: no additional padding is to be performed in ucontext_t. */
99
100 /* Machine-specific uc_flags value */
101 #define _UC_M68K_UC_USER 0x40000000
102 #define _UC_TLSBASE 0x00080000
103
104 #define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_A7])
105 #define _UC_MACHINE_FP(uc) ((uc)->uc_mcontext.__gregs[_REG_A6])
106 #define _UC_MACHINE_PC(uc) ((uc)->uc_mcontext.__gregs[_REG_PC])
107 #define _UC_MACHINE_INTRV(uc) ((uc)->uc_mcontext.__gregs[_REG_D0])
108
109 #define _UC_MACHINE_SET_PC(uc, pc) _UC_MACHINE_PC(uc) = (pc)
110
111 #define __UCONTEXT_SIZE 1024
112
113 #if defined(_LIBC_SOURCE) || defined(_RTLD_SOURCE) || defined(__LIBPTHREAD_SOURCE__)
114 #define TLS_TP_OFFSET 0x7000
115 #define TLS_DTV_OFFSET 0x8000
116
117 #include <sys/tls.h>
118
119 __CTASSERT(TLS_TP_OFFSET + sizeof(struct tls_tcb) < 0x8000);
120 __CTASSERT(TLS_TP_OFFSET % sizeof(struct tls_tcb) == 0);
121
122 __BEGIN_DECLS
123
124 void *_lwp_getprivate(void);
125 void _lwp_setprivate(void *);
126
127 static __inline struct tls_tcb *
__lwp_gettcb_fast(void)128 __lwp_gettcb_fast(void)
129 {
130 unsigned int __tcb = (unsigned int)_lwp_getprivate();
131 return (struct tls_tcb *)(uintptr_t)
132 (__tcb - TLS_TP_OFFSET - sizeof(struct tls_tcb));
133 }
134
135 static inline void
__lwp_settcb(struct tls_tcb * __tcb)136 __lwp_settcb(struct tls_tcb *__tcb)
137 {
138 __tcb += TLS_TP_OFFSET / sizeof(*__tcb) + 1;
139 _lwp_setprivate(__tcb);
140 }
141 __END_DECLS
142 #endif
143
144 #endif /* !_M68K_MCONTEXT_H_ */
145