1 /* 2 ** Copyright 2007, The Android Open Source Project 3 ** 4 ** Licensed under the Apache License, Version 2.0 (the "License"); 5 ** you may not use this file except in compliance with the License. 6 ** You may obtain a copy of the License at 7 ** 8 ** http://www.apache.org/licenses/LICENSE-2.0 9 ** 10 ** Unless required by applicable law or agreed to in writing, software 11 ** distributed under the License is distributed on an "AS IS" BASIS, 12 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 ** See the License for the specific language governing permissions and 14 ** limitations under the License. 15 */ 16 17 #include <ctype.h> 18 #include <string.h> 19 #include <errno.h> 20 21 #include <sys/ioctl.h> 22 23 #include <cutils/log.h> 24 #include <cutils/properties.h> 25 26 #include "../hooks.h" 27 #include "../egl_impl.h" 28 29 using namespace android; 30 31 // ---------------------------------------------------------------------------- 32 // Actual GL entry-points 33 // ---------------------------------------------------------------------------- 34 35 #undef API_ENTRY 36 #undef CALL_GL_API 37 #undef CALL_GL_API_RETURN 38 39 #if USE_SLOW_BINDING 40 41 #define API_ENTRY(_api) _api 42 43 #define CALL_GL_API(_api, ...) \ 44 gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; \ 45 if (_c) return _c->_api(__VA_ARGS__); 46 47 #elif defined(__arm__) 48 49 #define GET_TLS(reg) "mrc p15, 0, " #reg ", c13, c0, 3 \n" 50 51 #define API_ENTRY(_api) __attribute__((noinline)) _api 52 53 #define CALL_GL_API(_api, ...) \ 54 asm volatile( \ 55 GET_TLS(r12) \ 56 "ldr r12, [r12, %[tls]] \n" \ 57 "cmp r12, #0 \n" \ 58 "ldrne pc, [r12, %[api]] \n" \ 59 : \ 60 : [tls] "J"(TLS_SLOT_OPENGL_API*4), \ 61 [api] "J"(__builtin_offsetof(gl_hooks_t, gl._api)) \ 62 : "r12" \ 63 ); 64 65 #elif defined(__aarch64__) 66 67 #define API_ENTRY(_api) __attribute__((noinline)) _api 68 69 #define CALL_GL_API(_api, ...) \ 70 asm volatile( \ 71 "mrs x16, tpidr_el0\n" \ 72 "ldr x16, [x16, %[tls]]\n" \ 73 "cbz x16, 1f\n" \ 74 "ldr x16, [x16, %[api]]\n" \ 75 "br x16\n" \ 76 "1:\n" \ 77 : \ 78 : [tls] "i" (TLS_SLOT_OPENGL_API * sizeof(void*)), \ 79 [api] "i" (__builtin_offsetof(gl_hooks_t, gl._api)) \ 80 : "x16" \ 81 ); 82 83 #elif defined(__i386__) 84 85 #define API_ENTRY(_api) __attribute__((noinline)) _api 86 87 #define CALL_GL_API(_api, ...) \ 88 register void** fn; \ 89 __asm__ volatile( \ 90 "mov %%gs:0, %[fn]\n" \ 91 "mov %P[tls](%[fn]), %[fn]\n" \ 92 "test %[fn], %[fn]\n" \ 93 "je 1f\n" \ 94 "jmp *%P[api](%[fn])\n" \ 95 "1:\n" \ 96 : [fn] "=r" (fn) \ 97 : [tls] "i" (TLS_SLOT_OPENGL_API*sizeof(void*)), \ 98 [api] "i" (__builtin_offsetof(gl_hooks_t, gl._api)) \ 99 : "cc" \ 100 ); 101 102 #elif defined(__x86_64__) 103 104 #define API_ENTRY(_api) __attribute__((noinline)) _api 105 106 #define CALL_GL_API(_api, ...) \ 107 register void** fn; \ 108 __asm__ volatile( \ 109 "mov %%fs:0, %[fn]\n" \ 110 "mov %P[tls](%[fn]), %[fn]\n" \ 111 "test %[fn], %[fn]\n" \ 112 "je 1f\n" \ 113 "jmp *%P[api](%[fn])\n" \ 114 "1:\n" \ 115 : [fn] "=r" (fn) \ 116 : [tls] "i" (TLS_SLOT_OPENGL_API*sizeof(void*)), \ 117 [api] "i" (__builtin_offsetof(gl_hooks_t, gl._api)) \ 118 : "cc" \ 119 ); 120 121 #elif defined(__mips__) 122 123 #define API_ENTRY(_api) __attribute__((noinline)) _api 124 125 #define CALL_GL_API(_api, ...) \ 126 register unsigned int _t0 asm("t0"); \ 127 register unsigned int _fn asm("t1"); \ 128 register unsigned int _tls asm("v1"); \ 129 register unsigned int _v0 asm("v0"); \ 130 asm volatile( \ 131 ".set push\n\t" \ 132 ".set noreorder\n\t" \ 133 ".set mips32r2\n\t" \ 134 "rdhwr %[tls], $29\n\t" \ 135 "lw %[t0], %[OPENGL_API](%[tls])\n\t" \ 136 "beqz %[t0], 1f\n\t" \ 137 " move %[fn],$ra\n\t" \ 138 "lw %[fn], %[API](%[t0])\n\t" \ 139 "movz %[fn], $ra, %[fn]\n\t" \ 140 "1:\n\t" \ 141 "j %[fn]\n\t" \ 142 " move %[v0], $0\n\t" \ 143 ".set pop\n\t" \ 144 : [fn] "=c"(_fn), \ 145 [tls] "=&r"(_tls), \ 146 [t0] "=&r"(_t0), \ 147 [v0] "=&r"(_v0) \ 148 : [OPENGL_API] "I"(TLS_SLOT_OPENGL_API*4), \ 149 [API] "I"(__builtin_offsetof(gl_hooks_t, gl._api)) \ 150 : \ 151 ); 152 153 #endif 154 155 #define CALL_GL_API_RETURN(_api, ...) \ 156 CALL_GL_API(_api, __VA_ARGS__) \ 157 return 0; 158 159 160 161 extern "C" { 162 #pragma GCC diagnostic ignored "-Wunused-parameter" 163 #include "gl2_api.in" 164 #include "gl2ext_api.in" 165 #pragma GCC diagnostic warning "-Wunused-parameter" 166 } 167 168 #undef API_ENTRY 169 #undef CALL_GL_API 170 #undef CALL_GL_API_RETURN 171 172 /* 173 * glGetString() is special because we expose some extensions in the wrapper 174 */ 175 176 extern "C" const GLubyte * __glGetString(GLenum name); 177 178 const GLubyte * glGetString(GLenum name) 179 { 180 const GLubyte * ret = egl_get_string_for_current_context(name); 181 if (ret == NULL) { 182 gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; 183 ret = _c->glGetString(name); 184 } 185 return ret; 186 } 187
