-ulong simple_strtoul(const char *cp,char **endp,unsigned int base);
-int strict_strtoul(const char *cp, unsigned int base, unsigned long *res);
-unsigned long long simple_strtoull(const char *cp,char **endp,unsigned int base);
-long simple_strtol(const char *cp,char **endp,unsigned int base);
-void panic(const char *fmt, ...)
- __attribute__ ((format (__printf__, 1, 2), noreturn));
-int sprintf(char * buf, const char *fmt, ...)
- __attribute__ ((format (__printf__, 2, 3)));
-int vsprintf(char *buf, const char *fmt, va_list args);
-char *simple_itoa(ulong i);