void glinject_init_hooks() {
if(g_glinject_hooks_initialized)
return;
// part 1: get dlsym and dlvsym
eh_obj_t libdl;
if(eh_find_obj(&libdl, "*/libdl.so*")) {
fprintf(stderr, "[SSR-GLInject] Can't open libdl.so!\n");
exit(-181818181);
}
if(eh_find_sym(&libdl, "dlsym", (void **) &g_glinject_real_dlsym)) {
fprintf(stderr, "[SSR-GLInject] Can't get dlsym address!\n");
eh_destroy_obj(&libdl);
exit(-181818181);
}
if(eh_find_sym(&libdl, "dlvsym", (void **) &g_glinject_real_dlvsym)) {
fprintf(stderr, "[SSR-GLInject] Can't get dlvsym address!\n");
eh_destroy_obj(&libdl);
exit(-181818181);
}
eh_destroy_obj(&libdl);
// part 2: get everything else
g_glinject_real_glXCreateWindow = (GLXWindow (*)(Display*, GLXFBConfig, Window, const int*)) g_glinject_real_dlsym(RTLD_NEXT, "glXCreateWindow");
if(g_glinject_real_glXCreateWindow == NULL) {
fprintf(stderr, "[SSR-GLInject] Can't get glXCreateWindow address!\n");
exit(-181818181);
}
g_glinject_real_glXSwapBuffers = (void (*)(Display*, GLXDrawable)) g_glinject_real_dlsym(RTLD_NEXT, "glXSwapBuffers");
if(g_glinject_real_glXSwapBuffers == NULL) {
fprintf(stderr, "[SSR-GLInject] Can't get glXSwapBuffers address!\n");
exit(-181818181);
}
g_glinject_real_glXGetProcAddressARB = (GLXextFuncPtr (*)(const GLubyte*)) g_glinject_real_dlsym(RTLD_NEXT, "glXGetProcAddressARB");
if(g_glinject_real_glXGetProcAddressARB == NULL) {
fprintf(stderr, "[SSR-GLInject] Can't get glXGetProcAddressARB address!\n");
exit(-181818181);
}
g_glinject_real_XNextEvent = (int (*)(Display*, XEvent*)) g_glinject_real_dlsym(RTLD_NEXT, "XNextEvent");
if(g_glinject_real_XNextEvent == NULL) {
fprintf(stderr, "[SSR-GLInject] Can't get XNextEvent address!\n");
exit(-181818181);
}
g_glinject_hooks_initialized = 1;
}
extern "C" void* dlsym(void* handle, const char* symbol) {
glinject_init_hooks();
for(unsigned int i = 0; i < sizeof(hook_table) / sizeof(Hook); ++i) {
if(strcmp(hook_table[i].name, symbol) == 0) {
fprintf(stderr, "[SSR-GLInject] Hooked: dlsym(%s).\n", symbol);
return hook_table[i].address;
}
}
return g_glinject_real_dlsym(handle, symbol);
}
extern "C" void* dlsym(void* handle, const char* symbol) {
InitGLInject();
for(unsigned int i = 0; i < sizeof(hook_table) / sizeof(Hook); ++i) {
if(strcmp(hook_table[i].name, symbol) == 0) {
std::lock_guard<std::mutex> lock(g_glinject_mutex);
GLINJECT_PRINT("Hooked: dlsym(" << symbol << ").");
return hook_table[i].address;
}
}
return g_glinject_real_dlsym(handle, symbol);
}
void InitGLInject() {
std::lock_guard<std::mutex> lock(g_glinject_mutex);
if(g_glinject != NULL)
return;
// part 1: get dlsym and dlvsym
eh_obj_t libdl;
if(eh_find_obj(&libdl, "*/libdl.so*")) {
GLINJECT_PRINT("Error: Can't open libdl.so!");
exit(1);
}
if(eh_find_sym(&libdl, "dlsym", (void**) &g_glinject_real_dlsym)) {
GLINJECT_PRINT("Error: Can't get dlsym address!");
eh_destroy_obj(&libdl);
exit(1);
}
if(eh_find_sym(&libdl, "dlvsym", (void**) &g_glinject_real_dlvsym)) {
GLINJECT_PRINT("Error: Can't get dlvsym address!");
eh_destroy_obj(&libdl);
exit(1);
}
eh_destroy_obj(&libdl);
// part 2: get everything else
g_glinject_real_glXCreateWindow = (GLXWindow (*)(Display*, GLXFBConfig, Window, const int*)) g_glinject_real_dlsym(RTLD_NEXT, "glXCreateWindow");
if(g_glinject_real_glXCreateWindow == NULL) {
GLINJECT_PRINT("Error: Can't get glXCreateWindow address!");
exit(1);
}
g_glinject_real_glXDestroyWindow = (void (*)(Display*, GLXWindow)) g_glinject_real_dlsym(RTLD_NEXT, "glXDestroyWindow");
if(g_glinject_real_glXDestroyWindow == NULL) {
GLINJECT_PRINT("Error: Can't get glXDestroyWindow address!");
exit(1);
}
g_glinject_real_XDestroyWindow = (int (*)(Display*, Window)) g_glinject_real_dlsym(RTLD_NEXT, "XDestroyWindow");
if(g_glinject_real_XDestroyWindow == NULL) {
GLINJECT_PRINT("Error: Can't get XDestroyWindow address!");
exit(1);
}
g_glinject_real_glXSwapBuffers = (void (*)(Display*, GLXDrawable)) g_glinject_real_dlsym(RTLD_NEXT, "glXSwapBuffers");
if(g_glinject_real_glXSwapBuffers == NULL) {
GLINJECT_PRINT("Error: Can't get glXSwapBuffers address!");
exit(1);
}
g_glinject_real_glXGetProcAddressARB = (GLXextFuncPtr (*)(const GLubyte*)) g_glinject_real_dlsym(RTLD_NEXT, "glXGetProcAddressARB");
if(g_glinject_real_glXGetProcAddressARB == NULL) {
GLINJECT_PRINT("Error: Can't get glXGetProcAddressARB address!");
exit(1);
}
g_glinject_real_XNextEvent = (int (*)(Display*, XEvent*)) g_glinject_real_dlsym(RTLD_NEXT, "XNextEvent");
if(g_glinject_real_XNextEvent == NULL) {
GLINJECT_PRINT("Error: Can't get XNextEvent address!");
exit(1);
}
g_glinject = new GLInject();
atexit(FreeGLInject);
}
