1 /* Copyright © 2013, Intel Corporation
3 * Permission is hereby granted, free of charge, to any person obtaining a copy
4 * of this software and associated documentation files (the "Software"), to deal
5 * in the Software without restriction, including without limitation the rights
6 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
7 * copies of the Software, and to permit persons to whom the Software is
8 * furnished to do so, subject to the following conditions:
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
18 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
32 open_libgl_handle (void)
39 path = getenv ("GLAZE_LIBGL");
41 fprintf (stderr, "GLAZE_LIBGL unset. Please set to path of real libGL.so under glaze.\n");
45 libgl_handle = dlopen (path, RTLD_LAZY | RTLD_GLOBAL);
46 if (libgl_handle == NULL) {
47 fprintf (stderr, "Error: Failed to dlopen %s\n", path);
53 open_wrapper_handle (void)
60 path = getenv ("GLAZE_WRAPPER");
62 fprintf (stderr, "GLAZE_WRAPPER unset. Please set to path of real libGL.so under glaze.\n");
66 wrapper_handle = dlopen (path, RTLD_LAZY);
67 if (wrapper_handle == NULL) {
68 fprintf (stderr, "Error: Failed to dlopen %s\n", path);
74 glaze_init (void) __attribute__((constructor));
80 open_wrapper_handle ();
84 resolve (const char *name)
88 /* The wrapper gets first choice on all symbols. */
89 symbol = dlsym (wrapper_handle, name);
93 return dlsym (libgl_handle, name);
96 #define GLAZE_API(name) \
97 void * name() __attribute__((ifunc(#name "_resolver"))); \
99 name ## _resolver (void) { return resolve (#name); }
101 #include "specs/gl.def"
102 #include "specs/glx.def"