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 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 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