Changeset 58618 in vbox

Timestamp:

Nov 9, 2015 2:25:58 PM (9 years ago)

Author:

vboxsync

Message:

bugref:8087: Additions/x11: support non-root X server: make the VBoxOGL.so replacement OpenGL library executable. Executing it returns 0 if the system it is running on supports VirtualBox OpenGL pass-through in its current configuration and 1 otherwise. The intended use is knowing at guest boot time whether or not to put the library in place.

File:

• trunk/src/VBox/Additions/common/crOpenGL/load.c (modified) (1 diff)

trunk/src/VBox/Additions/common/crOpenGL/load.c

@@ -1126 +1126 @@
 /* Sigh -- we can't do initialization at load time, since Windows forbids
  * the loading of other libraries from DLLMain. */
+
+/** @note On Linux we make our shared library executable as a quick way of
+ * testing whether a particular guest supports 3D in the current configuration.
+ * If 3D is not enabled, the constructor will exit with status 1.  If the
+ * library cannot be loaded at all (e.g. missing dependencies) executing it will
+ * also fail. */
+#ifdef RT_OS_LINUX
+# ifdef RT_ARCH_AMD64
+const char pszInterpreter[] __attribute__((section(".interp"))) = "/lib64/ld-linux-x86-64.so.2";
+# else
+const char pszInterpreter[] __attribute__((section(".interp"))) = "/lib/ld-linux.so.2";
+# endif
+
+extern void LibMain()
+{
+   if (!stubInit())
+       _exit(1);
+   _exit(0);
+}
+#endif
 
 #ifdef WINDOWS