#include <stdio.h>#include <asm/unistd.h> static char *syscall_names[] = {};  #define nelem(x) (sizeof(x)/sizeof((x)[0])) char *strsyscall(int n) {	if (0 <= n && n < nelem(syscall_names) && syscall_names[n])		return syscall_names[n];	static char buf[40];	snprintf(buf, sizeof buf, "syscall%#x", n);	return buf;}