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-rw-r--r--hooks.h57
1 files changed, 40 insertions, 17 deletions
diff --git a/hooks.h b/hooks.h
index c0da47e..e1c131e 100644
--- a/hooks.h
+++ b/hooks.h
@@ -13,14 +13,18 @@ static snd_pcm_sframes_t (*_snd_pcm_mmap_writei)(snd_pcm_t*, const void*, snd_pc
static snd_pcm_sframes_t (*_snd_pcm_mmap_writen)(snd_pcm_t*, void**, snd_pcm_uframes_t);
static int (*_clock_gettime)(clockid_t, struct timespec*);
static void* store_real_symbol_and_return_fake_symbol(const char*, void*);
-static void hook_function(void**, const char*, const bool);
+static void hook_function(void**, const char*, const bool, const char*[]);
-#define HOOK(x) hook_function((void**)&_##x, #x, false)
+#define HOOK(x) hook_function((void**)&_##x, #x, false, NULL)
+#define HOOK_FROM(x, ...) hook_function((void**)&_##x, #x, false, (const char*[]){ __VA_ARGS__, NULL })
+
+// Use HOOK_FROM with this list for any GL/GLX stuff
+#define GL_LIBS "libGL.so", "libGLESv1_CM.so", "libGLESv2.so", "libGLX.so"
void
glBlitFramebuffer(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter)
{
- HOOK(glBlitFramebuffer);
+ HOOK_FROM(glBlitFramebuffer, GL_LIBS);
const GLint a[] = { srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1 };
memcpy(LAST_FRAMEBUFFER_BLIT, a, sizeof(a));
_glBlitFramebuffer(srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, mask, filter);
@@ -29,7 +33,7 @@ glBlitFramebuffer(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX
EGLBoolean
eglSwapBuffers(EGLDisplay dpy, EGLSurface surface)
{
- HOOK(eglSwapBuffers);
+ HOOK_FROM(eglSwapBuffers, "libEGL.so");
swap_buffers();
return _eglSwapBuffers(dpy, surface);
}
@@ -37,14 +41,14 @@ eglSwapBuffers(EGLDisplay dpy, EGLSurface surface)
__eglMustCastToProperFunctionPointerType
eglGetProcAddress(const char *procname)
{
- HOOK(eglGetProcAddress);
+ HOOK_FROM(eglGetProcAddress, "libEGL.so");
return (_eglGetProcAddress ? store_real_symbol_and_return_fake_symbol(procname, _eglGetProcAddress(procname)) : NULL);
}
void
glXSwapBuffers(Display *dpy, GLXDrawable drawable)
{
- HOOK(glXSwapBuffers);
+ HOOK_FROM(glXSwapBuffers, GL_LIBS);
swap_buffers();
_glXSwapBuffers(dpy, drawable);
}
@@ -52,14 +56,14 @@ glXSwapBuffers(Display *dpy, GLXDrawable drawable)
__GLXextFuncPtr
glXGetProcAddressARB(const GLubyte *procname)
{
- HOOK(glXGetProcAddressARB);
+ HOOK_FROM(glXGetProcAddressARB, GL_LIBS);
return (_glXGetProcAddressARB ? store_real_symbol_and_return_fake_symbol((const char*)procname, _glXGetProcAddressARB(procname)) : NULL);
}
__GLXextFuncPtr
glXGetProcAddress(const GLubyte *procname)
{
- HOOK(glXGetProcAddress);
+ HOOK_FROM(glXGetProcAddress, GL_LIBS);
return (_glXGetProcAddress ? store_real_symbol_and_return_fake_symbol((const char*)procname, _glXGetProcAddress(procname)) : NULL);
}
@@ -136,21 +140,40 @@ store_real_symbol_and_return_fake_symbol(const char *symbol, void *ret)
return ret;
}
-#define HOOK_DLSYM(x) hook_function((void**)&_##x, #x, true)
+#define HOOK_DLSYM(x) hook_function((void**)&_##x, #x, true, NULL)
+
+static void*
+get_symbol(void *src, const char *name, const bool versioned)
+{
+ if (!src)
+ return NULL;
+
+ if (versioned) {
+ void *ptr = NULL;
+ const char *versions[] = { "GLIBC_2.0", "GLIBC_2.2.5" };
+ for (size_t i = 0; !ptr && i < ARRAY_SIZE(versions); ++i)
+ ptr = dlvsym(src, name, versions[i]);
+ return ptr;
+ }
+
+ HOOK_DLSYM(dlsym);
+ return _dlsym(src, name);
+}
static void
-hook_function(void **ptr, const char *name, const bool versioned)
+hook_function(void **ptr, const char *name, const bool versioned, const char *srcs[])
{
if (*ptr)
return;
- if (versioned) {
- const char *versions[] = { "GLIBC_2.0", "GLIBC_2.2.5" };
- for (size_t i = 0; !*ptr && i < ARRAY_SIZE(versions); ++i)
- *ptr = dlvsym(RTLD_NEXT, name, versions[i]);
- } else {
- HOOK_DLSYM(dlsym);
- *ptr = _dlsym(RTLD_NEXT, name);
+ *ptr = get_symbol(RTLD_NEXT, name, versioned);
+
+ for (size_t i = 0; !*ptr && srcs && srcs[i]; ++i) {
+ // If we know where the symbol comes from, but program e.g. used dlopen with RTLD_LOCAL
+ // Should be only needed with GL/GLES/EGL stuff as we don't link to those for reason.
+ void *so = dlopen(srcs[i], RTLD_LAZY | RTLD_NOLOAD);
+ WARNX("Trying dlopen: %s (%p) (RTLD_LAZY | RTLD_NOLOAD)", srcs[i], so);
+ *ptr = get_symbol(so, name, versioned);
}
if (!*ptr)