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typedef struct Data	Data;
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typedef struct Page	Page;
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typedef struct Proc	Proc;
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typedef struct Seg	Seg;
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enum {
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	Psegment = 0,
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	Pfd,
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	Pfpregs,
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	Pkregs,
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	Pnoteid,
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	Pns,
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	Pproc,
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	Pregs,
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	Pstatus,
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	Npfile,
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	Pagesize = 1024,	/* need not relate to kernel */
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};
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struct Data {
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	ulong len;
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	char data[1];
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};
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struct Seg {
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	char*	name;
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	uvlong	offset;
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	uvlong	 len;
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	Page**	pg;
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	int	npg;
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};
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struct Page {
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	Page*	link;
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	ulong	len;
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	char*	data;
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	/* when page is written, these hold the ptr to it */
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	int	written;
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	int	type;
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	ulong	pid;
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	uvlong	offset;
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};
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struct Proc {
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	Proc *link;
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	long	pid;
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	Data*	d[Npfile];
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	Seg**	seg;	/* memory segments */
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	int	nseg;
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	Seg*	text;	/* text file */
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};
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extern char *pfile[Npfile];
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Proc*	snap(long pid, int usetext);
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void*	emalloc(ulong);
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void*	erealloc(void*, ulong);
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char*	estrdup(char*);
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void	writesnap(Biobuf*, Proc*);
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Page*	datapage(char *p, long len);
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Proc*	readsnap(Biobuf *b);
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Page*	findpage(Proc *plist, long pid, int type, uvlong off);
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int	debug;