getProcAddress.cpp revision 24035338ed6329e4d85fb00cf99a91e2cdd55ba5 
1/*
2 ** Copyright 2009, 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 <stdlib.h>
19#include <errno.h>
20
21#include <cutils/log.h>
22
23#include "hooks.h"
24
25// ----------------------------------------------------------------------------
26namespace android {
27// ----------------------------------------------------------------------------
28
29#undef API_ENTRY
30#undef CALL_GL_API
31#undef GL_EXTENSION
32#undef GL_EXTENSION_NAME
33
34#if defined(__arm__)
35
36    #ifdef HAVE_ARM_TLS_REGISTER
37        #define GET_TLS(reg) \
38            "mrc p15, 0, " #reg ", c13, c0, 3 \n"
39    #else
40        #define GET_TLS(reg) \
41            "mov   " #reg ", #0xFFFF0FFF      \n"  \
42            "ldr   " #reg ", [" #reg ", #-15] \n"
43    #endif
44
45    #define API_ENTRY(_api) __attribute__((naked)) _api
46
47    #define CALL_GL_EXTENSION_API(_api)                         \
48         asm volatile(                                          \
49            GET_TLS(r12)                                        \
50            "ldr   r12, [r12, %[tls]] \n"                       \
51            "cmp   r12, #0            \n"                       \
52            "ldrne r12, [r12, %[api]] \n"                       \
53            "cmpne r12, #0            \n"                       \
54            "bxne  r12                \n"                       \
55            "bx    lr                 \n"                       \
56            :                                                   \
57            : [tls] "J"(TLS_SLOT_OPENGL_API*4),                 \
58              [api] "J"(__builtin_offsetof(gl_hooks_t,          \
59                                      ext.extensions[_api]))    \
60            :                                                   \
61            );
62
63    #define GL_EXTENSION_NAME(_n)  __glExtFwd##_n
64
65    #define GL_EXTENSION(_n)                         \
66        void API_ENTRY(GL_EXTENSION_NAME(_n))() {    \
67            CALL_GL_EXTENSION_API(_n);               \
68        }
69
70
71#else
72
73    #define GL_EXTENSION_NAME(_n) NULL
74
75    #define GL_EXTENSION(_n)
76
77    #warning "eglGetProcAddress() partially supported on this architecture"
78
79#endif
80
81GL_EXTENSION(0)
82GL_EXTENSION(1)
83GL_EXTENSION(2)
84GL_EXTENSION(3)
85GL_EXTENSION(4)
86GL_EXTENSION(5)
87GL_EXTENSION(6)
88GL_EXTENSION(7)
89GL_EXTENSION(8)
90GL_EXTENSION(9)
91GL_EXTENSION(10)
92GL_EXTENSION(11)
93GL_EXTENSION(12)
94GL_EXTENSION(13)
95GL_EXTENSION(14)
96GL_EXTENSION(15)
97
98GL_EXTENSION(16)
99GL_EXTENSION(17)
100GL_EXTENSION(18)
101GL_EXTENSION(19)
102GL_EXTENSION(20)
103GL_EXTENSION(21)
104GL_EXTENSION(22)
105GL_EXTENSION(23)
106GL_EXTENSION(24)
107GL_EXTENSION(25)
108GL_EXTENSION(26)
109GL_EXTENSION(27)
110GL_EXTENSION(28)
111GL_EXTENSION(29)
112GL_EXTENSION(30)
113GL_EXTENSION(31)
114
115GL_EXTENSION(32)
116GL_EXTENSION(33)
117GL_EXTENSION(34)
118GL_EXTENSION(35)
119GL_EXTENSION(36)
120GL_EXTENSION(37)
121GL_EXTENSION(38)
122GL_EXTENSION(39)
123GL_EXTENSION(40)
124GL_EXTENSION(41)
125GL_EXTENSION(42)
126GL_EXTENSION(43)
127GL_EXTENSION(44)
128GL_EXTENSION(45)
129GL_EXTENSION(46)
130GL_EXTENSION(47)
131
132GL_EXTENSION(48)
133GL_EXTENSION(49)
134GL_EXTENSION(50)
135GL_EXTENSION(51)
136GL_EXTENSION(52)
137GL_EXTENSION(53)
138GL_EXTENSION(54)
139GL_EXTENSION(55)
140GL_EXTENSION(56)
141GL_EXTENSION(57)
142GL_EXTENSION(58)
143GL_EXTENSION(59)
144GL_EXTENSION(60)
145GL_EXTENSION(61)
146GL_EXTENSION(62)
147GL_EXTENSION(63)
148
149extern const __eglMustCastToProperFunctionPointerType gExtensionForwarders[MAX_NUMBER_OF_GL_EXTENSIONS] = {
150     GL_EXTENSION_NAME(0),  GL_EXTENSION_NAME(1),  GL_EXTENSION_NAME(2),  GL_EXTENSION_NAME(3),
151     GL_EXTENSION_NAME(4),  GL_EXTENSION_NAME(5),  GL_EXTENSION_NAME(6),  GL_EXTENSION_NAME(7),
152     GL_EXTENSION_NAME(8),  GL_EXTENSION_NAME(9),  GL_EXTENSION_NAME(10), GL_EXTENSION_NAME(11),
153     GL_EXTENSION_NAME(12), GL_EXTENSION_NAME(13), GL_EXTENSION_NAME(14), GL_EXTENSION_NAME(15),
154     GL_EXTENSION_NAME(16), GL_EXTENSION_NAME(17), GL_EXTENSION_NAME(18), GL_EXTENSION_NAME(19),
155     GL_EXTENSION_NAME(20), GL_EXTENSION_NAME(21), GL_EXTENSION_NAME(22), GL_EXTENSION_NAME(23),
156     GL_EXTENSION_NAME(24), GL_EXTENSION_NAME(25), GL_EXTENSION_NAME(26), GL_EXTENSION_NAME(27),
157     GL_EXTENSION_NAME(28), GL_EXTENSION_NAME(29), GL_EXTENSION_NAME(30), GL_EXTENSION_NAME(31),
158     GL_EXTENSION_NAME(32), GL_EXTENSION_NAME(33), GL_EXTENSION_NAME(34), GL_EXTENSION_NAME(35),
159     GL_EXTENSION_NAME(36), GL_EXTENSION_NAME(37), GL_EXTENSION_NAME(38), GL_EXTENSION_NAME(39),
160     GL_EXTENSION_NAME(40), GL_EXTENSION_NAME(41), GL_EXTENSION_NAME(42), GL_EXTENSION_NAME(43),
161     GL_EXTENSION_NAME(44), GL_EXTENSION_NAME(45), GL_EXTENSION_NAME(46), GL_EXTENSION_NAME(47),
162     GL_EXTENSION_NAME(48), GL_EXTENSION_NAME(49), GL_EXTENSION_NAME(50), GL_EXTENSION_NAME(51),
163     GL_EXTENSION_NAME(52), GL_EXTENSION_NAME(53), GL_EXTENSION_NAME(54), GL_EXTENSION_NAME(55),
164     GL_EXTENSION_NAME(56), GL_EXTENSION_NAME(57), GL_EXTENSION_NAME(58), GL_EXTENSION_NAME(59),
165     GL_EXTENSION_NAME(60), GL_EXTENSION_NAME(61), GL_EXTENSION_NAME(62), GL_EXTENSION_NAME(63)
166 };
167
168#undef GL_EXTENSION_NAME
169#undef GL_EXTENSION
170#undef API_ENTRY
171#undef CALL_GL_API
172
173// ----------------------------------------------------------------------------
174}; // namespace android
175// ----------------------------------------------------------------------------
176
177