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 * $FreeBSD$ 27 */ 28 29 #include <stdio.h> 30 31 #define __G_TLS_OFFSETS_SIZE 8 32 unsigned long int __gl_tls_offsets[__G_TLS_OFFSETS_SIZE]; 33 34 void __gl_tls_init_offsets(); 35 36 #ifdef __GL_TLS_SINGLE_INSTRUCTION 37 #define THREAD_GETMEM(num) \ 38 ({ \ 39 void *__value; \ 40 __asm__ __volatile__ ( \ 41 "movl %%gs:(%1),%0" \ 42 : "=r" (__value) \ 43 : "r" (__gl_tls_offsets[num]) \ 44 ); \ 45 __value; \ 46 }) 47 48 #define THREAD_SETMEM(num, value) \ 49 do { \ 50 void *__value = (value); \ 51 __asm__ __volatile__ ( \ 52 "movl %0,%%gs:(%1)" \ 53 : \ 54 : "r" (__value), \ 55 "r" (__gl_tls_offsets[num]) \ 56 ); \ 57 } while (0) 58 #else 59 #define __GL_TLS_GET(num) \ 60 ({ \ 61 void *__dummy, *__value; \ 62 __asm__ __volatile__ ( \ 63 "movl %%gs:0,%2 \n\t" \ 64 "movl (%2,%1),%0 \n\t" \ 65 : "=r" (__value) \ 66 : "r" (__gl_tls_offsets[num]), \ 67 "r" (__dummy) \ 68 ); \ 69 __value; \ 70 }) 71 72 #define __GL_TLS_SET(num, value) \ 73 do { \ 74 void *__dummy, *__value = (value); \ 75 __asm__ __volatile__ ( \ 76 "movl %%gs:0,%2 \n\t" \ 77 "movl %0,(%2,%1) \n\t" \ 78 : \ 79 : "r" (__value), \ 80 "r" (__gl_tls_offsets[num]), \ 81 "r" (__dummy) \ 82 ); \ 83 } while (0) 84 #endif 85 86 void _init(void) 87 { 88 __gl_tls_init_offsets(); 89 90 __GL_TLS_SET(0, (void *) 0xff000000); 91 __GL_TLS_SET(1, (void *) 0xff000001); 92 __GL_TLS_SET(2, (void *) 0xff000002); 93 __GL_TLS_SET(3, (void *) 0xff000003); 94 __GL_TLS_SET(4, (void *) 0xff000004); 95 __GL_TLS_SET(5, (void *) 0xff000005); 96 __GL_TLS_SET(6, (void *) 0xff000006); 97 __GL_TLS_SET(7, (void *) 0xff000007); 98 } 99 100 void __gl_tls_test(void) 101 { 102 printf("__GL_TLS_GET(0) = %p\n", __GL_TLS_GET(0)); 103 printf("__GL_TLS_GET(1) = %p\n", __GL_TLS_GET(1)); 104 printf("__GL_TLS_GET(2) = %p\n", __GL_TLS_GET(2)); 105 printf("__GL_TLS_GET(3) = %p\n", __GL_TLS_GET(3)); 106 printf("__GL_TLS_GET(4) = %p\n", __GL_TLS_GET(4)); 107 printf("__GL_TLS_GET(5) = %p\n", __GL_TLS_GET(5)); 108 printf("__GL_TLS_GET(6) = %p\n", __GL_TLS_GET(6)); 109 printf("__GL_TLS_GET(7) = %p\n", __GL_TLS_GET(7)); 110 } 111