extern	ulong	FPcontrol(ulong,ulong);
extern	ulong	FPstatus(ulong,ulong);
extern	void	FPsave(void*);
extern	void	FPrestore(void*);
extern	void	Sleep(Rendez*, int (*)(void*), void*);
extern	void	Wakeup(Rendez*);
extern	void	FPinit(void);
extern	void	addprog(Proc*);
extern	Block*	allocb(int);
extern	int	canlock(Lock*);
extern	int	canqlock(QLock*);
extern	void	cclose(Chan*);
extern	void	chandevinit(void);
extern	void	chanfree(Chan*);
extern	Chan*	cclone(Chan*, Chan*);
extern	void	closefgrp(Fgrp*);
extern	void	closepgrp(Pgrp*);
extern	int	cmount(Chan*, Chan*, int, char*);
extern	int	convD2M(Dir*, char*);
extern	int	convM2D(char*, Dir*);
extern	Chan*	createdir(Chan*);
extern	void	cunmount(Chan*, Chan*);
extern	int	decref(Ref*);
extern	Chan*	devattach(int, char*);
extern	Block*	devbread(Chan*, long, ulong);
extern	long	devbwrite(Chan*, Block*, ulong);
extern	Chan*	devclone(Chan*, Chan*);
extern	void	devdir(Chan*, Qid, char*, long, char*, long, Dir*);
extern	long	devdirread(Chan*, char*, long, Dirtab*, int, Devgen*);
extern	int	devgen(Chan*, Dirtab*, int, int, Dir*);
extern	int	devno(int, int);
extern	Chan*	devopen(Chan*, int, Dirtab*, int, Devgen*);
extern	void	devstat(Chan*, char*, Dirtab*, int, Devgen*);
extern	int	devwalk(Chan*, char*, Dirtab*, int, Devgen*);
extern	int	dirmodeconv(va_list*, Fconv*);
extern	void	disfault(void*, char*);
extern	void	disinit(void*);
extern	Chan*	domount(Chan*);
extern	Fgrp*	dupfgrp(Fgrp*);
extern	void	emuinit(void*);
extern	int	eqchan(Chan*, Chan*, int);
extern	int	eqqid(Qid, Qid);
extern	void	exhausted(char *);
extern	int	export(int, int, int);
extern	Chan*	fdtochan(Fgrp*, int, int, int, int);
extern	void	freeb(Block*);
extern	void	freeblist(Block*);
extern	ulong	getFPcontrol(void);
extern	ulong	getFPstatus(void);
extern	void	gkbdputc(Queue*, int);
extern	int	incref(Ref*);
extern	long	ipreadnew(Chan *, void *, long, ulong, int);
extern	long	ipwritenew(Chan *, void *, long, ulong, int);
extern	void	isdir(Chan*);
extern	int	kannounce(char*, char*);
extern	int	kdial(char*, char*, char*, int*);
extern	int	kproc(char*, void (*)(void*), void*);
extern	int	kfgrpclose(Fgrp*, int);
extern	void	libinit(char*);
extern	void	lock(Lock*);
extern	void	mountfree(Mount*);
extern	Chan*	namec(char*, int, int, ulong);
extern	void	nameok(char*);
extern	Chan*	newchan(void);
extern	Fgrp*	newfgrp(void);
extern	Mount*	newmount(Mhead*, Chan*, int, char*);
extern	Pgrp*	newpgrp(void);
extern	Proc*	newproc(void);
extern	char*	nextelem(char*, char*);
extern	void	nexterror(void);
extern	int	openmode(ulong);
extern	int	oscmd(char*, int*, int*);
extern	void	oserrstr(char*);
extern	long	osmillisec(void);
extern	int	osmillisleep(ulong);
extern	vlong	osusectime(void);
extern	Block*	padblock(Block*, int);
extern	void	panic(char*, ...);
extern	int	parsefields(char*, char**, int, char*);
extern	void	pexit(char*, int);
extern	void	pgrpcpy(Pgrp*, Pgrp*);
extern	void	ptclose(Pthash*);
extern	Path*	ptenter(Pthash*, Path*, char*);
extern	int	ptpath(Path*, char*, int);
extern	Block*	pullupblock(Block*, int);
extern	Block*	qbread(Queue*, int);
extern	long	qbwrite(Queue*, Block*);
extern	int	qcanread(Queue*);
extern	void	qclose(Queue*);
extern	int	qclosed(Queue*);
extern	int	qconsume(Queue*, void*, int);
extern	Block*	qcopy(Queue*, int, ulong);
extern	void	qdiscard(Queue*, int);
extern	void	qflush(Queue*);
extern	void	qfree(Queue*);
extern	int	qfull(Queue*);
extern	Block*	qget(Queue*);
extern	void	qhangup(Queue*, char*);
extern	int	qiwrite(Queue*, void*, int);
extern	int	qlen(Queue*);
extern	void	qlock(QLock*);
extern	void	qnoblock(Queue*, int);
extern	Queue*	qopen(int, int, void (*)(void*), void*);
extern	int	qpass(Queue*, Block*);
extern	int	qproduce(Queue*, void*, int);
extern	long	qread(Queue*, void*, int);
extern	void	qreopen(Queue*);
extern	void	qsetlimit(Queue*, int);
extern	int	qstate(Queue*);
extern	void	qunlock(QLock*);
extern	int	qwindow(Queue*);
extern	long	qwrite(Queue*, void*, int);
extern	int	readkbd(void);
extern	int	readnum(ulong, char*, ulong, ulong, int);
extern	int	readnum_vlong(ulong, char*, ulong, vlong, int);
extern	int	readstr(ulong, char*, ulong, char*);
extern	int	rendezvous(void*, ulong);
extern	void	rlock(RWlock*);
extern	void	runlock(RWlock*);
extern	void*	sbrk(int);
extern	void	seterror(char*, ...);
extern	void	setid(char*);
extern	char*	skipslash(char*);
extern	void	srvrtinit(void);
extern	void	swiproc(Proc*);
extern	int	unionread(Chan*, void*, long);
extern	void	unlock(Lock*);
extern	void	vmachine(void*);
extern	Chan*	walk(Chan*, char*, int);
extern	void	wlock(RWlock*);
extern	void	wunlock(RWlock*);
extern	void	cleanexit(int);
extern	void	oshostintr(Proc*);
extern	void	osenter(void);
extern	void	osleave(void);
extern	void	ospause(void);
extern  void    osyield(void);
extern	void	osspin(Rendez*);
extern	Rb*	osraninit(void);
extern	void	oswakeupproducer(Rendez*);
extern	Pool*	poolmk(char*, int, int, int);

/*  malloc */
extern	void*	malloc(size_t);
extern	void	free(void*);
extern	void*	realloc(void*, size_t);

/* Namespace Emulation */
extern	int	kbind(char*, char*, int);
extern	int	kclose(int);
extern	int	kcreate(char*, int, ulong);
extern	int	kdup(int, int);
extern	int	kfstat(int, char*);
extern	int	kfwstat(int, char*);
extern	int	kmount(int, char*, int, char*);
extern	int	kunmount(char*, char*);
extern	int	kopen(char*, int);
extern	long	kread(int, void*, long);
extern	int	kremove(char*);
extern	long	kseek(int, long, int);
extern	int	kstat(char*, char*);
extern	long	kwrite(int, void*, long);
extern	int	kwstat(char*, char*);
extern	int	kdirstat(char*, Dir*);
extern	int	kdirfstat(int, Dir*);
extern	int	kdirwstat(char*, Dir*);
extern	int	kdirfwstat(int, Dir*);
extern	long	kdirread(int, Dir*, long);
extern	int	klisten(char*, char*);
extern	void	devcreate(Chan*, char*, int, ulong);
extern	void	devremove(Chan*);
extern	void	devwstat(Chan*, char*);

extern	void	fsremove(Chan*);