[USER] Init libc with arguments and environment

MESS - execve - Clean up and move earlier

libc/thread.c

@@ -0,0 +1,21 @@
+#include "syscalls.h"
+
+struct pthread *__pt;
+
+struct pthread *__pthread_self()
+{
+  return __pt;
+}
+
+SYSCALL_DEF(set_thread_area)
+{
+  SYSCALL_INIT(void *, ptr);
+  __pt = ptr;
+  return 0;
+}
+
+SYSCALL_DEF(set_tid_address)
+{
+  SYSCALL_INIT();
+  return 0;
+}