4 Iobuf* getbuf(Xdata*, ulong);
5 Xdata* getxdata(char*);
8 void panic(int, char*, ...);
11 void refxfs(Xfs*, int);
12 void showdir(int, Dir*);
13 Xfile* xfile(int, int);
14 void setnames(Dir*, char*);
16 #define waserror() (++nerr_lab, setjmp(err_lab[nerr_lab-1]))
17 #define poperror() (--nerr_lab)