/* ** Copyright 2009, The Android Open Source Project ** ** Licensed under the Apache License, Version 2.0 (the "License"); ** you may not use this file except in compliance with the License. ** You may obtain a copy of the License at ** ** http://www.apache.org/licenses/LICENSE-2.0 ** ** Unless required by applicable law or agreed to in writing, software ** distributed under the License is distributed on an "AS IS" BASIS, ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. ** See the License for the specific language governing permissions and ** limitations under the License. */ #include #include #include #include #include "egldefs.h" namespace android { #undef API_ENTRY #undef CALL_GL_EXTENSION_API #undef GL_EXTENSION #undef GL_EXTENSION_NAME #undef GL_EXTENSION_ARRAY #undef GL_EXTENSION_LIST #undef GET_TLS // clang-format off #if defined(__arm__) #define GET_TLS(reg) "mrc p15, 0, " #reg ", c13, c0, 3 \n" #define API_ENTRY(_api) __attribute__((naked)) _api #define CALL_GL_EXTENSION_API(_api) \ asm volatile( \ GET_TLS(r12) \ "ldr r12, [r12, %[tls]] \n" \ "cmp r12, #0 \n" \ "addne r12, %[api] \n" \ "ldrne r12, [r12, %[ext]] \n" \ "cmpne r12, #0 \n" \ "bxne r12 \n" \ "bx lr \n" \ : \ : [tls] "J"(TLS_SLOT_OPENGL_API*4), \ [ext] "J"(__builtin_offsetof(gl_hooks_t, \ ext.extensions[0])), \ [api] "I"(_api*sizeof(void*)) \ : "r12" \ ); #elif defined(__aarch64__) #define API_ENTRY(_api) __attribute__((noinline)) _api #define CALL_GL_EXTENSION_API(_api) \ asm volatile( \ "mrs x16, tpidr_el0\n" \ "ldr x16, [x16, %[tls]]\n" \ "cbz x16, 1f\n" \ "ldr x16, [x16, %[api]]\n" \ "cbz x16, 1f\n" \ "br x16\n" \ "1:\n" \ : \ : [tls] "i" (TLS_SLOT_OPENGL_API * sizeof(void*)), \ [api] "i" (__builtin_offsetof(gl_hooks_t, \ ext.extensions[_api])) \ : "x16" \ ); #elif defined(__i386__) #define API_ENTRY(_api) __attribute__((naked)) _api #define CALL_GL_EXTENSION_API(_api) \ __asm__ volatile( \ "mov %%gs:0, %%eax\n" \ "mov %P[tls](%%eax), %%eax\n" \ "test %%eax, %%eax\n" \ "cmovne %P[api](%%eax), %%eax\n" \ "test %%eax, %%eax\n" \ "je 1f\n" \ "jmp *%%eax\n" \ "1: ret\n" \ : \ : [tls] "i" (TLS_SLOT_OPENGL_API*sizeof(void*)), \ [api] "i" (__builtin_offsetof(gl_hooks_t, \ ext.extensions[_api])) \ : "eax", "cc" \ ); #elif defined(__x86_64__) #define API_ENTRY(_api) __attribute__((naked)) _api #define CALL_GL_EXTENSION_API(_api) \ __asm__ volatile( \ "mov %%fs:0, %%rax\n" \ "mov %P[tls](%%rax), %%rax\n" \ "test %%rax, %%rax\n" \ "cmovne %P[api](%%rax), %%rax\n" \ "test %%rax, %%rax\n" \ "je 1f\n" \ "jmp *%%rax\n" \ "1: ret\n" \ : \ : [tls] "i" (TLS_SLOT_OPENGL_API*sizeof(void*)), \ [api] "i" (__builtin_offsetof(gl_hooks_t, \ ext.extensions[_api])) \ : "rax", "cc" \ ); #elif defined(__riscv) #define API_ENTRY(_api) __attribute__((noinline)) _api #define CALL_GL_EXTENSION_API(_api) \ asm volatile( \ "mv t0, tp\n" \ "li t1, %[tls]\n" \ "add t0, t0, t1\n" \ "ld t0, 0(t0)\n" \ "beqz t0, 1f\n" \ "li t1, %[api]\n" \ "add t0, t0, t1\n" \ "ld t0, 0(t0)\n" \ "jalr x0, t0\n" \ "1: ret\n" \ : \ : [tls] "i" (TLS_SLOT_OPENGL_API * sizeof(void*)), \ [api] "i" (__builtin_offsetof(gl_hooks_t, \ ext.extensions[_api])) \ : "t0", "t1" \ ); #endif #if defined(CALL_GL_EXTENSION_API) #define GL_EXTENSION_NAME(_n) __glExtFwd##_n #define GL_EXTENSION(_n) \ void API_ENTRY(GL_EXTENSION_NAME(_n))() { \ CALL_GL_EXTENSION_API(_n); \ } #else #define GL_EXTENSION_NAME(_n) NULL #define GL_EXTENSION(_n) #warning "eglGetProcAddress() partially supported" #endif #define GL_EXTENSION_LIST(name) \ name(0) name(1) name(2) name(3) name(4) name(5) name(6) name(7) \ name(8) name(9) name(10) name(11) name(12) name(13) name(14) name(15) \ name(16) name(17) name(18) name(19) name(20) name(21) name(22) name(23) \ name(24) name(25) name(26) name(27) name(28) name(29) name(30) name(31) \ name(32) name(33) name(34) name(35) name(36) name(37) name(38) name(39) \ name(40) name(41) name(42) name(43) name(44) name(45) name(46) name(47) \ name(48) name(49) name(50) name(51) name(52) name(53) name(54) name(55) \ name(56) name(57) name(58) name(59) name(60) name(61) name(62) name(63) \ name(64) name(65) name(66) name(67) name(68) name(69) name(70) name(71) \ name(72) name(73) name(74) name(75) name(76) name(77) name(78) name(79) \ name(80) name(81) name(82) name(83) name(84) name(85) name(86) name(87) \ name(88) name(89) name(90) name(91) name(92) name(93) name(94) name(95) \ name(96) name(97) name(98) name(99) \ name(100) name(101) name(102) name(103) name(104) name(105) name(106) name(107) \ name(108) name(109) name(110) name(111) name(112) name(113) name(114) name(115) \ name(116) name(117) name(118) name(119) name(120) name(121) name(122) name(123) \ name(124) name(125) name(126) name(127) name(128) name(129) name(130) name(131) \ name(132) name(133) name(134) name(135) name(136) name(137) name(138) name(139) \ name(140) name(141) name(142) name(143) name(144) name(145) name(146) name(147) \ name(148) name(149) name(150) name(151) name(152) name(153) name(154) name(155) \ name(156) name(157) name(158) name(159) name(160) name(161) name(162) name(163) \ name(164) name(165) name(166) name(167) name(168) name(169) name(170) name(171) \ name(172) name(173) name(174) name(175) name(176) name(177) name(178) name(179) \ name(180) name(181) name(182) name(183) name(184) name(185) name(186) name(187) \ name(188) name(189) name(190) name(191) name(192) name(193) name(194) name(195) \ name(196) name(197) name(198) name(199) \ name(200) name(201) name(202) name(203) name(204) name(205) name(206) name(207) \ name(208) name(209) name(210) name(211) name(212) name(213) name(214) name(215) \ name(216) name(217) name(218) name(219) name(220) name(221) name(222) name(223) \ name(224) name(225) name(226) name(227) name(228) name(229) name(230) name(231) \ name(232) name(233) name(234) name(235) name(236) name(237) name(238) name(239) \ name(240) name(241) name(242) name(243) name(244) name(245) name(246) name(247) \ name(248) name(249) name(250) name(251) name(252) name(253) name(254) name(255) GL_EXTENSION_LIST(GL_EXTENSION) #define GL_EXTENSION_ARRAY(_n) GL_EXTENSION_NAME(_n), // clang-format on extern const __eglMustCastToProperFunctionPointerType gExtensionForwarders[MAX_NUMBER_OF_GL_EXTENSIONS] = {GL_EXTENSION_LIST(GL_EXTENSION_ARRAY)}; #undef GET_TLS #undef GL_EXTENSION_LIST #undef GL_EXTENSION_ARRAY #undef GL_EXTENSION_NAME #undef GL_EXTENSION #undef API_ENTRY #undef CALL_GL_EXTENSION_API }; // namespace android