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/*
* Parts of this file are not covered by:
* ----------------------------------------------------------------------------
* "THE BEER-WARE LICENSE" (Revision 42):
* <phk@login.dknet.dk> wrote this file. As long as you retain this notice you
* can do whatever you want with this stuff. If we meet some day, and you think
* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
* ----------------------------------------------------------------------------
*
* $Id: inflate.h,v 1.2 1994/10/07 23:18:18 csgr Exp $
*
* This module handles execution of a.out files which have been run through
* "gzip -9".
*
* For now you need to use exactly this command to compress the binaries:
*
* gzip -9 -v < /bin/sh > /tmp/sh
*
* TODO:
* text-segments should be made R/O after being filled
* is the vm-stuff safe ?
* should handle the entire header of gzip'ed stuff.
* inflate isn't quite reentrant yet...
* error-handling is a mess...
* so is the rest...
* tidy up unnecessary includes
*/
#ifndef _SYS_INFLATE_H_
#define _SYS_INFLATE_H_
#ifdef KERNEL
#include <sys/param.h>
#include <sys/imgact.h>
#include <sys/imgact_aout.h>
/* needed to make inflate() work */
#define uch u_char
#define ush u_short
#define ulg u_long
#define WSIZE 0x8000
struct gzip {
struct image_params *ip;
struct exec a_out;
int error;
int where;
u_char *inbuf;
u_long offset;
u_long output;
u_long len;
int idx;
u_long virtual_offset, file_offset, file_end, bss_size;
unsigned gz_wp;
u_char *gz_slide;
};
/*
* Global variables used by inflate and friends.
* This structure is used in order to make inflate() reentrant.
*/
struct gz_global {
ulg gz_bb; /* bit buffer */
unsigned gz_bk; /* bits in bit buffer */
unsigned gz_hufts; /* track memory usage */
struct huft *gz_fixed_tl; /* must init to NULL !! */
struct huft *gz_fixed_td;
int gz_fixed_bl;
int gz_fixed_bd;
};
int inflate __P((struct gzip *, struct gz_global *));
int do_aout_hdr __P((struct gzip *));
#define slide (gz->gz_slide)
#define wp (gz->gz_wp)
#endif /* KERNEL */
#endif /* ! _SYS_INFLATE_H_ */
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