global cleanup to use the new syscall interface

src/process/execve.c

@@ -4,5 +4,5 @@
 int execve(const char *path, char *const argv[], char *const envp[])
 {
 	/* do we need to use environ if envp is null? */
-	return syscall3(__NR_execve, (long)path, (long)argv, (long)envp);
+	return syscall(SYS_execve, path, argv, envp);
 }