1 /*-
2 * Copyright (C) 2004 NVIDIA Corporation.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <stdio.h>
28
29 #define __G_TLS_OFFSETS_SIZE 8
30 unsigned long int __gl_tls_offsets[__G_TLS_OFFSETS_SIZE];
31
32 void __gl_tls_init_offsets();
33
34 #ifdef __GL_TLS_SINGLE_INSTRUCTION
35 #define THREAD_GETMEM(num) \
36 ({ \
37 void *__value; \
38 __asm__ __volatile__ ( \
39 "movl %%gs:(%1),%0" \
40 : "=r" (__value) \
41 : "r" (__gl_tls_offsets[num]) \
42 ); \
43 __value; \
44 })
45
46 #define THREAD_SETMEM(num, value) \
47 do { \
48 void *__value = (value); \
49 __asm__ __volatile__ ( \
50 "movl %0,%%gs:(%1)" \
51 : \
52 : "r" (__value), \
53 "r" (__gl_tls_offsets[num]) \
54 ); \
55 } while (0)
56 #else
57 #define __GL_TLS_GET(num) \
58 ({ \
59 void *__dummy, *__value; \
60 __asm__ __volatile__ ( \
61 "movl %%gs:0,%2 \n\t" \
62 "movl (%2,%1),%0 \n\t" \
63 : "=r" (__value) \
64 : "r" (__gl_tls_offsets[num]), \
65 "r" (__dummy) \
66 ); \
67 __value; \
68 })
69
70 #define __GL_TLS_SET(num, value) \
71 do { \
72 void *__dummy, *__value = (value); \
73 __asm__ __volatile__ ( \
74 "movl %%gs:0,%2 \n\t" \
75 "movl %0,(%2,%1) \n\t" \
76 : \
77 : "r" (__value), \
78 "r" (__gl_tls_offsets[num]), \
79 "r" (__dummy) \
80 ); \
81 } while (0)
82 #endif
83
_init(void)84 void _init(void)
85 {
86 __gl_tls_init_offsets();
87
88 __GL_TLS_SET(0, (void *) 0xff000000);
89 __GL_TLS_SET(1, (void *) 0xff000001);
90 __GL_TLS_SET(2, (void *) 0xff000002);
91 __GL_TLS_SET(3, (void *) 0xff000003);
92 __GL_TLS_SET(4, (void *) 0xff000004);
93 __GL_TLS_SET(5, (void *) 0xff000005);
94 __GL_TLS_SET(6, (void *) 0xff000006);
95 __GL_TLS_SET(7, (void *) 0xff000007);
96 }
97
__gl_tls_test(void)98 void __gl_tls_test(void)
99 {
100 printf("__GL_TLS_GET(0) = %p\n", __GL_TLS_GET(0));
101 printf("__GL_TLS_GET(1) = %p\n", __GL_TLS_GET(1));
102 printf("__GL_TLS_GET(2) = %p\n", __GL_TLS_GET(2));
103 printf("__GL_TLS_GET(3) = %p\n", __GL_TLS_GET(3));
104 printf("__GL_TLS_GET(4) = %p\n", __GL_TLS_GET(4));
105 printf("__GL_TLS_GET(5) = %p\n", __GL_TLS_GET(5));
106 printf("__GL_TLS_GET(6) = %p\n", __GL_TLS_GET(6));
107 printf("__GL_TLS_GET(7) = %p\n", __GL_TLS_GET(7));
108 }
109