LibC/DynamicLoader: Add support for dynamically loaded TLS

Previously I failed to dlopen if any of the objects contained TLS
section

userspace/libraries/LibC/include/pthread.h

@@ -17,25 +17,41 @@ __BEGIN_DECLS
 
 #include <bits/types/pthread_types.h>
 
-struct _pthread_cleanup_t
+typedef struct _pthread_cleanup_t
 {
 	void (*routine)(void*);
 	void* arg;
 	struct _pthread_cleanup_t* next;
-};
+} _pthread_cleanup_t;
+
+typedef struct _dynamic_tls_entry_t
+{
+	void* master_addr;
+	size_t master_size;
+} _dynamic_tls_entry_t;
+
+typedef struct _dynamic_tls_t
+{
+	int lock;
+	size_t entry_count;
+	_dynamic_tls_entry_t* entries;
+} _dynamic_tls_t;
 
 struct uthread
 {
 	struct uthread* self;
 	void* master_tls_addr;
 	size_t master_tls_size;
-	struct _pthread_cleanup_t* cleanup_stack;
+	size_t master_tls_module_count;
+	_dynamic_tls_t* dynamic_tls;
+	_pthread_cleanup_t* cleanup_stack;
 	pthread_t id;
 	int errno_;
 	int cancel_type;
 	int cancel_state;
 	int canceled;
-	uintptr_t dtv[];
+	// FIXME: make this dynamic
+	uintptr_t dtv[1 + 128];
 };
 
 #define PTHREAD_CANCELED				(void*)1