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04277e02 | 1 | /* Copyright (C) 2005-2019 Free Software Foundation, Inc. |
7756ba9d DH |
2 | |
3 | This file is part of the GNU C Library. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public License as | |
7 | published by the Free Software Foundation; either version 2.1 of the | |
8 | License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
7756ba9d DH |
18 | |
19 | #ifndef _TLS_H | |
20 | # define _TLS_H 1 | |
21 | ||
22 | # include <dl-sysdep.h> | |
23 | ||
24 | #ifndef __ASSEMBLER__ | |
25 | # include <stdbool.h> | |
26 | # include <stddef.h> | |
27 | # include <stdint.h> | |
aca1daef | 28 | # include <dl-dtv.h> |
7756ba9d DH |
29 | |
30 | #else /* __ASSEMBLER__ */ | |
31 | # include <tcb-offsets.h> | |
32 | #endif /* __ASSEMBLER__ */ | |
33 | ||
34 | #ifndef __ASSEMBLER__ | |
35 | ||
36 | /* Get system call information. */ | |
37 | # include <sysdep.h> | |
38 | ||
39 | /* The TP points to the start of the thread blocks. */ | |
40 | # define TLS_DTV_AT_TP 1 | |
498a2233 | 41 | # define TLS_TCB_AT_TP 0 |
7756ba9d DH |
42 | |
43 | /* Get the thread descriptor definition. */ | |
44 | # include <nptl/descr.h> | |
45 | ||
46 | typedef struct | |
47 | { | |
48 | dtv_t *dtv; | |
49 | void *private; | |
50 | } tcbhead_t; | |
51 | ||
b360ee62 DH |
52 | #define READ_THREAD_POINTER() \ |
53 | ({ register void *__microblaze_thread_area asm ("r21"); \ | |
54 | __microblaze_thread_area; }) | |
7756ba9d DH |
55 | |
56 | /* This is the size of the initial TCB. */ | |
57 | # define TLS_INIT_TCB_SIZE sizeof (tcbhead_t) | |
58 | ||
59 | /* Alignment requirements for the initial TCB. */ | |
60 | # define TLS_INIT_TCB_ALIGN __alignof__ (tcbhead_t) | |
61 | ||
62 | /* This is the size of the TCB. */ | |
63 | # define TLS_TCB_SIZE sizeof (tcbhead_t) | |
64 | ||
65 | /* This is the size we need before TCB. */ | |
66 | # define TLS_PRE_TCB_SIZE sizeof (struct pthread) | |
67 | ||
68 | /* Alignment requirements for the TCB. */ | |
69 | # define TLS_TCB_ALIGN __alignof__ (struct pthread) | |
70 | ||
71 | /* Install the dtv pointer. The pointer passed is to the element with | |
72 | index -1 which contain the length. */ | |
73 | # define INSTALL_DTV(tcbp, dtvp) \ | |
74 | (((tcbhead_t *) (tcbp))->dtv = (dtvp) + 1) | |
75 | ||
76 | /* Install new dtv for current thread. */ | |
77 | # define INSTALL_NEW_DTV(dtv) \ | |
78 | (THREAD_DTV() = (dtv)) | |
79 | ||
80 | /* Return dtv of given thread descriptor. */ | |
81 | # define GET_DTV(tcbp) \ | |
82 | (((tcbhead_t *) (tcbp))->dtv) | |
83 | ||
84 | /* Code to initially initialize the thread pointer. | |
85 | r21 is reserved for thread pointer. */ | |
774f9285 | 86 | # define TLS_INIT_TP(tcbp) \ |
caff764e | 87 | ({ __asm __volatile ("or r21,r0,%0" : : "r" ((void *)tcbp)); NULL; }) |
7756ba9d | 88 | |
9bca952a RM |
89 | # define TLS_DEFINE_INIT_TP(tp, pd) void *tp = (pd) + 1 |
90 | ||
7756ba9d DH |
91 | /* Return the address of the dtv for the current thread. */ |
92 | # define THREAD_DTV() \ | |
93 | (((tcbhead_t *) READ_THREAD_POINTER())->dtv) | |
94 | ||
95 | /* Return the thread descriptor for the current thread. */ | |
96 | # define THREAD_SELF \ | |
97 | (((struct pthread *) READ_THREAD_POINTER()) - 1) | |
98 | ||
99 | /* Magic for libthread_db to know how to do THREAD_SELF. */ | |
100 | # define DB_THREAD_SELF \ | |
101 | CONST_THREAD_AREA (32, sizeof (struct pthread)) | |
102 | ||
103 | /* Read member of the thread descriptor directly. */ | |
104 | # define THREAD_GETMEM(descr, member) (descr->member) | |
105 | ||
106 | /* Same as THREAD_GETMEM, but the member offset can be non-constant. */ | |
107 | # define THREAD_GETMEM_NC(descr, member, idx) \ | |
108 | (descr->member[idx]) | |
109 | ||
110 | /* Set member of the thread descriptor directly. */ | |
111 | # define THREAD_SETMEM(descr, member, value) \ | |
112 | (descr->member = (value)) | |
113 | ||
114 | /* Same as THREAD_SETMEM, but the member offset can be non-constant. */ | |
115 | # define THREAD_SETMEM_NC(descr, member, idx, value) \ | |
116 | (descr->member[idx] = (value)) | |
117 | ||
118 | /* Get and set the global scope generation counter in struct pthread. */ | |
a5df0318 | 119 | # define THREAD_GSCOPE_IN_TCB 1 |
7756ba9d DH |
120 | # define THREAD_GSCOPE_FLAG_UNUSED 0 |
121 | # define THREAD_GSCOPE_FLAG_USED 1 | |
122 | # define THREAD_GSCOPE_FLAG_WAIT 2 | |
123 | # define THREAD_GSCOPE_RESET_FLAG() \ | |
124 | do \ | |
125 | { int __res \ | |
126 | = atomic_exchange_rel (&THREAD_SELF->header.gscope_flag, \ | |
127 | THREAD_GSCOPE_FLAG_UNUSED); \ | |
128 | if (__res == THREAD_GSCOPE_FLAG_WAIT) \ | |
129 | lll_futex_wake (&THREAD_SELF->header.gscope_flag, 1, LLL_PRIVATE); \ | |
130 | } \ | |
131 | while (0) | |
132 | # define THREAD_GSCOPE_SET_FLAG() \ | |
133 | do \ | |
134 | { \ | |
135 | THREAD_SELF->header.gscope_flag = THREAD_GSCOPE_FLAG_USED; \ | |
136 | atomic_write_barrier (); \ | |
137 | } \ | |
138 | while (0) | |
139 | # define THREAD_GSCOPE_WAIT() \ | |
140 | GL (dl_wait_lookup_done) () | |
141 | ||
142 | #endif /* __ASSEMBLER__ */ | |
143 | ||
144 | #endif /* tls.h. */ |