ret = do_fork(SIGCHLD, 0, NULL, 0, NULL, NULL); 
ret = do_fork(SIGCHLD, UPT_SP(&current->thread.regs.regs), &current->thread.regs, 0, NULL, NULL); 
long sys_fork(void){	long ret;	current->thread.forking = 1;        ret = do_fork(SIGCHLD, 0, NULL, 0, NULL, NULL);	current->thread.forking = 0;	return(ret);}
4520	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4520/e0877f07e85a46e4fde32bd84f08551d360839fe/syscall_kern.c/clean/arch/um/kernel/syscall_kern.c