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/*
** 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 <ctype.h>
#include <errno.h>
#include <log/log.h>
#include <stdlib.h>
#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
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