I belive imgact_gzip is finally reentrant. It is also a whole lot more
readable. inflate is now much more general, and is there if anybody feels like making a uncompressing filesystem or something like that (hint hint !)
This commit is contained in:
Poul-Henning Kamp
parent
3200ea201e
commit
6aafb7e048
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=3784
@ -1,20 +1,15 @@
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/*
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* Parts of this file are not covered by:
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* ----------------------------------------------------------------------------
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* "THE BEER-WARE LICENSE" (Revision 42):
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* <phk@login.dknet.dk> wrote this file. As long as you retain this notice you
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* <phk@login.dkuug.dk> wrote this file. As long as you retain this notice you
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* can do whatever you want with this stuff. If we meet some day, and you think
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* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
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* ----------------------------------------------------------------------------
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*
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* $Id: imgact_gzip.c,v 1.7 1994/10/07 22:26:51 csgr Exp $
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* $Id$
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*
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* This module handles execution of a.out files which have been run through
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* "gzip -9".
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*
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* For now you need to use exactly this command to compress the binaries:
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*
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* gzip -9 -v < /bin/sh > /tmp/sh
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* "gzip". This saves diskspace, but wastes cpu-cycles and VM.
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*
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* TODO:
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* text-segments should be made R/O after being filled
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@ -26,265 +21,351 @@
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* tidy up unnecesary includes
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*/
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#include <sys/param.h> /* some header file needs this first foo! */
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#include <sys/param.h>
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#include <sys/exec.h>
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#include <sys/imgact.h>
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#include <sys/imgact_aout.h>
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#include <sys/inflate.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/mman.h>
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#include <sys/resourcevar.h>
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#include <sys/sysent.h>
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#include <sys/systm.h>
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#include <sys/inflate.h>
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#include <vm/vm.h>
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#include <vm/vm_kern.h>
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struct imgact_gzip {
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struct image_params *ip;
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struct exec a_out;
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int error;
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int where;
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u_char *inbuf;
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u_long offset;
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u_long output;
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u_long len;
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int idx;
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u_long virtual_offset, file_offset, file_end, bss_size;
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};
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static int NextByte __P((void *vp));
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static int do_aout_hdr __P((struct imgact_gzip *));
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static int Flush __P((void *vp, u_char *, u_long siz));
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extern struct sysentvec aout_sysvec;
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int
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exec_gzip_imgact(iparams)
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struct image_params *iparams;
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{
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int error,error2=0;
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u_char *p = (u_char *) iparams->image_header;
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struct gzip *gz;
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struct gz_global gz_glbl;
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int error, error2 = 0;
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u_char *p = (u_char *) iparams->image_header;
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struct imgact_gzip igz;
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struct inflate infl;
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/* If these four are not OK, it isn't a gzip file */
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if (p[0] != 0x1f) return -1; /* 0 Simply magic */
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if (p[1] != 0x8b) return -1; /* 1 Simply magic */
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if (p[2] != 0x08) return -1; /* 2 Compression method */
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if (p[9] != 0x03) return -1; /* 9 OS compressed on */
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if (p[0] != 0x1f)
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return -1; /* 0 Simply magic */
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if (p[1] != 0x8b)
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return -1; /* 1 Simply magic */
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if (p[2] != 0x08)
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return -1; /* 2 Compression method */
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if (p[9] != 0x03)
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return -1; /* 9 OS compressed on */
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/* If this one contains anything but a comment or a filename
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* marker, we don't want to chew on it
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/*
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* If this one contains anything but a comment or a filename marker,
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* we don't want to chew on it
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*/
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if (p[3] & ~(0x18)) return ENOEXEC; /* 3 Flags */
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if (p[3] & ~(0x18))
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return ENOEXEC; /* 3 Flags */
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/* These are of no use to us */
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/* 4-7 Timestamp */
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/* 8 Extra flags */
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/* 4-7 Timestamp */
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/* 8 Extra flags */
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gz = malloc(sizeof *gz,M_GZIP,M_NOWAIT);
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if (!gz)
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return ENOMEM;
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bzero(gz,sizeof *gz); /* waste of time ? */
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bzero(&igz, sizeof igz);
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bzero(&infl, sizeof infl);
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infl.gz_private = (void *) &igz;
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infl.gz_input = NextByte;
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infl.gz_output = Flush;
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gz->gz_slide = malloc(WSIZE,M_TEMP,M_NOWAIT);
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if (!gz->gz_slide) {
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free(gz,M_GZIP);
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return ENOMEM;
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igz.ip = iparams;
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igz.idx = 10;
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if (p[3] & 0x08) { /* skip a filename */
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while (p[igz.idx++])
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if (igz.idx >= PAGE_SIZE)
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return ENOEXEC;
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}
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gz->ip = iparams;
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gz->error = ENOEXEC;
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gz->idx = 10;
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if (p[3] & 0x08) { /* skip a filename */
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while (p[gz->idx++])
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if (gz->idx >= PAGE_SIZE)
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goto done;
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if (p[3] & 0x10) { /* skip a comment */
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while (p[igz.idx++])
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if (igz.idx >= PAGE_SIZE)
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return ENOEXEC;
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}
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igz.len = igz.ip->attr->va_size;
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if (p[3] & 0x10) { /* skip a comment */
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while (p[gz->idx++])
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if (gz->idx >= PAGE_SIZE)
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goto done;
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error = inflate(&infl);
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if (igz.inbuf) {
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error2 =
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vm_deallocate(kernel_map, (vm_offset_t) igz.inbuf,
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PAGE_SIZE);
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}
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gz->len = gz->ip->attr->va_size;
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gz->error = 0;
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error = inflate(gz, &gz_glbl);
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if (gz->inbuf) {
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error2 =
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vm_deallocate(kernel_map, (vm_offset_t)gz->inbuf, PAGE_SIZE);
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if (igz.error || error || error2) {
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printf("Output=%lu ", igz.output);
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printf("Inflate_error=%d igz.error=%d error2=%d where=%d\n",
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error, igz.error, error2, igz.where);
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}
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if (gz->error || error || error2) {
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printf("Output=%lu ",gz->output);
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printf("Inflate_error=%d gz->error=%d error2=%d where=%d\n",
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error,gz->error,error2,gz->where);
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if (gz->error)
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goto done;
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if (error) {
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gz->error = ENOEXEC;
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goto done;
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}
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if (error2) {
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gz->error = error2;
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goto done;
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}
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}
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done:
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error = gz->error;
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free(gz->gz_slide,M_TEMP);
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free(gz,M_GZIP);
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return error;
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if (igz.error)
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return igz.error;
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if (error)
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return ENOEXEC;
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if (error2)
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return error2;
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return 0;
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}
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int
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do_aout_hdr(struct gzip *gz)
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static int
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do_aout_hdr(struct imgact_gzip * gz)
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{
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int error;
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struct vmspace *vmspace = gz->ip->proc->p_vmspace;
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u_long vmaddr;
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int error;
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struct vmspace *vmspace = gz->ip->proc->p_vmspace;
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u_long vmaddr;
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/*
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* Set file/virtual offset based on a.out variant.
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* We do two cases: host byte order and network byte order
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* (for NetBSD compatibility)
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*/
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switch ((int)(gz->a_out.a_magic & 0xffff)) {
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case ZMAGIC:
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gz->virtual_offset = 0;
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if (gz->a_out.a_text) {
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gz->file_offset = NBPG;
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} else {
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/* Bill's "screwball mode" */
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gz->file_offset = 0;
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}
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break;
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case QMAGIC:
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gz->virtual_offset = NBPG;
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gz->file_offset = 0;
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break;
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default:
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/* NetBSD compatibility */
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switch ((int)(ntohl(gz->a_out.a_magic) & 0xffff)) {
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/*
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* Set file/virtual offset based on a.out variant. We do two cases:
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* host byte order and network byte order (for NetBSD compatibility)
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*/
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switch ((int) (gz->a_out.a_magic & 0xffff)) {
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case ZMAGIC:
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gz->virtual_offset = 0;
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if (gz->a_out.a_text) {
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gz->file_offset = NBPG;
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} else {
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/* Bill's "screwball mode" */
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gz->file_offset = 0;
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}
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break;
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case QMAGIC:
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gz->virtual_offset = NBPG;
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gz->file_offset = 0;
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break;
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gz->virtual_offset = NBPG;
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gz->file_offset = 0;
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break;
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default:
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gz->where = __LINE__;
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return (-1);
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/* NetBSD compatibility */
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switch ((int) (ntohl(gz->a_out.a_magic) & 0xffff)) {
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case ZMAGIC:
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case QMAGIC:
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gz->virtual_offset = NBPG;
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gz->file_offset = 0;
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break;
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default:
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gz->where = __LINE__;
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return (-1);
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}
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}
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}
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gz->bss_size = roundup(gz->a_out.a_bss, NBPG);
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gz->bss_size = roundup(gz->a_out.a_bss, NBPG);
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/*
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* Check various fields in header for validity/bounds.
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*/
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if (/* entry point must lay with text region */
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gz->a_out.a_entry < gz->virtual_offset ||
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gz->a_out.a_entry >= gz->virtual_offset + gz->a_out.a_text ||
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/*
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* Check various fields in header for validity/bounds.
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*/
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if ( /* entry point must lay with text region */
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gz->a_out.a_entry < gz->virtual_offset ||
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gz->a_out.a_entry >= gz->virtual_offset + gz->a_out.a_text ||
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/* text and data size must each be page rounded */
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gz->a_out.a_text % NBPG ||
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gz->a_out.a_data % NBPG) {
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gz->where = __LINE__;
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return (-1);
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}
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/*
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* text/data/bss must not exceed limits
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*/
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if (/* text can't exceed maximum text size */
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gz->a_out.a_text > MAXTSIZ ||
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gz->a_out.a_text % NBPG ||
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gz->a_out.a_data % NBPG) {
|
||||
gz->where = __LINE__;
|
||||
return (-1);
|
||||
}
|
||||
/*
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||||
* text/data/bss must not exceed limits
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||||
*/
|
||||
if ( /* text can't exceed maximum text size */
|
||||
gz->a_out.a_text > MAXTSIZ ||
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||||
|
||||
/* data + bss can't exceed maximum data size */
|
||||
gz->a_out.a_data + gz->bss_size > MAXDSIZ ||
|
||||
gz->a_out.a_data + gz->bss_size > MAXDSIZ ||
|
||||
|
||||
/* data + bss can't exceed rlimit */
|
||||
gz->a_out.a_data + gz->bss_size >
|
||||
gz->a_out.a_data + gz->bss_size >
|
||||
gz->ip->proc->p_rlimit[RLIMIT_DATA].rlim_cur) {
|
||||
gz->where = __LINE__;
|
||||
return (ENOMEM);
|
||||
}
|
||||
gz->where = __LINE__;
|
||||
return (ENOMEM);
|
||||
}
|
||||
/* Find out how far we should go */
|
||||
gz->file_end = gz->file_offset + gz->a_out.a_text + gz->a_out.a_data;
|
||||
|
||||
/* Find out how far we should go */
|
||||
gz->file_end = gz->file_offset + gz->a_out.a_text + gz->a_out.a_data;
|
||||
/* copy in arguments and/or environment from old process */
|
||||
error = exec_extract_strings(gz->ip);
|
||||
if (error) {
|
||||
gz->where = __LINE__;
|
||||
return (error);
|
||||
}
|
||||
/*
|
||||
* Destroy old process VM and create a new one (with a new stack)
|
||||
*/
|
||||
exec_new_vmspace(gz->ip);
|
||||
|
||||
/* copy in arguments and/or environment from old process */
|
||||
error = exec_extract_strings(gz->ip);
|
||||
if (error) {
|
||||
gz->where = __LINE__;
|
||||
return (error);
|
||||
}
|
||||
vmaddr = gz->virtual_offset;
|
||||
|
||||
/*
|
||||
* Destroy old process VM and create a new one (with a new stack)
|
||||
*/
|
||||
exec_new_vmspace(gz->ip);
|
||||
error = vm_mmap(&vmspace->vm_map, /* map */
|
||||
&vmaddr,/* address */
|
||||
gz->a_out.a_text, /* size */
|
||||
VM_PROT_READ | VM_PROT_EXECUTE | VM_PROT_WRITE, /* protection */
|
||||
VM_PROT_READ | VM_PROT_EXECUTE | VM_PROT_WRITE,
|
||||
MAP_ANON | MAP_FIXED, /* flags */
|
||||
0, /* vnode */
|
||||
0); /* offset */
|
||||
|
||||
vmaddr = gz->virtual_offset;
|
||||
if (error) {
|
||||
gz->where = __LINE__;
|
||||
return (error);
|
||||
}
|
||||
vmaddr = gz->virtual_offset + gz->a_out.a_text;
|
||||
|
||||
error = vm_mmap(&vmspace->vm_map, /* map */
|
||||
&vmaddr, /* address */
|
||||
gz->a_out.a_text, /* size */
|
||||
VM_PROT_READ | VM_PROT_EXECUTE | VM_PROT_WRITE, /* protection */
|
||||
VM_PROT_READ | VM_PROT_EXECUTE | VM_PROT_WRITE,
|
||||
MAP_ANON | MAP_FIXED, /* flags */
|
||||
0, /* vnode */
|
||||
0); /* offset */
|
||||
/*
|
||||
* Map data read/write (if text is 0, assume text is in data area
|
||||
* [Bill's screwball mode])
|
||||
*/
|
||||
|
||||
if (error) {
|
||||
gz->where = __LINE__;
|
||||
return (error);
|
||||
}
|
||||
error = vm_mmap(&vmspace->vm_map,
|
||||
&vmaddr,
|
||||
gz->a_out.a_data,
|
||||
VM_PROT_READ | VM_PROT_WRITE | (gz->a_out.a_text ? 0 : VM_PROT_EXECUTE),
|
||||
VM_PROT_ALL, MAP_ANON | MAP_FIXED,
|
||||
0,
|
||||
0);
|
||||
|
||||
vmaddr = gz->virtual_offset + gz->a_out.a_text;
|
||||
if (error) {
|
||||
gz->where = __LINE__;
|
||||
return (error);
|
||||
}
|
||||
/*
|
||||
* Allocate demand-zeroed area for uninitialized data "bss" = 'block
|
||||
* started by symbol' - named after the IBM 7090 instruction of the
|
||||
* same name.
|
||||
*/
|
||||
vmaddr = gz->virtual_offset + gz->a_out.a_text + gz->a_out.a_data;
|
||||
error = vm_allocate(&vmspace->vm_map, &vmaddr, gz->bss_size, FALSE);
|
||||
if (error) {
|
||||
gz->where = __LINE__;
|
||||
return (error);
|
||||
}
|
||||
/* Fill in process VM information */
|
||||
vmspace->vm_tsize = gz->a_out.a_text >> PAGE_SHIFT;
|
||||
vmspace->vm_dsize = (gz->a_out.a_data + gz->bss_size) >> PAGE_SHIFT;
|
||||
vmspace->vm_taddr = (caddr_t) gz->virtual_offset;
|
||||
vmspace->vm_daddr = (caddr_t) gz->virtual_offset + gz->a_out.a_text;
|
||||
|
||||
/*
|
||||
* Map data read/write (if text is 0, assume text is in data area
|
||||
* [Bill's screwball mode])
|
||||
*/
|
||||
/* Fill in image_params */
|
||||
gz->ip->interpreted = 0;
|
||||
gz->ip->entry_addr = gz->a_out.a_entry;
|
||||
|
||||
error = vm_mmap(&vmspace->vm_map,
|
||||
&vmaddr,
|
||||
gz->a_out.a_data,
|
||||
VM_PROT_READ | VM_PROT_WRITE | (gz->a_out.a_text ? 0 : VM_PROT_EXECUTE),
|
||||
VM_PROT_ALL, MAP_ANON | MAP_FIXED,
|
||||
0,
|
||||
0);
|
||||
gz->ip->proc->p_sysent = &aout_sysvec;
|
||||
|
||||
if (error) {
|
||||
gz->where = __LINE__;
|
||||
return (error);
|
||||
}
|
||||
|
||||
/*
|
||||
* Allocate demand-zeroed area for uninitialized data
|
||||
* "bss" = 'block started by symbol' - named after the IBM 7090
|
||||
* instruction of the same name.
|
||||
*/
|
||||
vmaddr = gz->virtual_offset + gz->a_out.a_text + gz->a_out.a_data;
|
||||
error = vm_allocate(&vmspace->vm_map, &vmaddr, gz->bss_size, FALSE);
|
||||
if (error) {
|
||||
gz->where = __LINE__;
|
||||
return (error);
|
||||
}
|
||||
|
||||
/* Fill in process VM information */
|
||||
vmspace->vm_tsize = gz->a_out.a_text >> PAGE_SHIFT;
|
||||
vmspace->vm_dsize = (gz->a_out.a_data + gz->bss_size) >> PAGE_SHIFT;
|
||||
vmspace->vm_taddr = (caddr_t) gz->virtual_offset;
|
||||
vmspace->vm_daddr = (caddr_t) gz->virtual_offset + gz->a_out.a_text;
|
||||
|
||||
/* Fill in image_params */
|
||||
gz->ip->interpreted = 0;
|
||||
gz->ip->entry_addr = gz->a_out.a_entry;
|
||||
|
||||
gz->ip->proc->p_sysent = &aout_sysvec;
|
||||
|
||||
return 0;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
NextByte(void *vp)
|
||||
{
|
||||
int error;
|
||||
struct imgact_gzip *igz = (struct imgact_gzip *) vp;
|
||||
|
||||
if (igz->idx >= igz->len) {
|
||||
igz->where = __LINE__;
|
||||
return GZ_EOF;
|
||||
}
|
||||
if (igz->inbuf && igz->idx < (igz->offset + PAGE_SIZE)) {
|
||||
return igz->inbuf[(igz->idx++) - igz->offset];
|
||||
}
|
||||
if (igz->inbuf) {
|
||||
error = vm_deallocate(kernel_map,
|
||||
(vm_offset_t) igz->inbuf, PAGE_SIZE);
|
||||
if (error) {
|
||||
igz->where = __LINE__;
|
||||
igz->error = error;
|
||||
return GZ_EOF;
|
||||
}
|
||||
}
|
||||
igz->offset += PAGE_SIZE;
|
||||
|
||||
error = vm_mmap(kernel_map, /* map */
|
||||
(vm_offset_t *) & igz->inbuf, /* address */
|
||||
PAGE_SIZE, /* size */
|
||||
VM_PROT_READ, /* protection */
|
||||
VM_PROT_READ, /* max protection */
|
||||
0, /* flags */
|
||||
(caddr_t) igz->ip->vnodep, /* vnode */
|
||||
igz->offset); /* offset */
|
||||
if (error) {
|
||||
igz->where = __LINE__;
|
||||
igz->error = error;
|
||||
return GZ_EOF;
|
||||
}
|
||||
return igz->inbuf[(igz->idx++) - igz->offset];
|
||||
}
|
||||
|
||||
static int
|
||||
Flush(void *vp, u_char * ptr, u_long siz)
|
||||
{
|
||||
struct imgact_gzip *gz = (struct imgact_gzip *) vp;
|
||||
u_char *p = ptr, *q;
|
||||
int i;
|
||||
|
||||
/* First, find a a.out-header */
|
||||
if (gz->output < sizeof gz->a_out) {
|
||||
q = (u_char *) & gz->a_out;
|
||||
i = min(siz, sizeof gz->a_out - gz->output);
|
||||
bcopy(p, q + gz->output, i);
|
||||
gz->output += i;
|
||||
p += i;
|
||||
siz -= i;
|
||||
if (gz->output == sizeof gz->a_out) {
|
||||
i = do_aout_hdr(gz);
|
||||
if (i == -1) {
|
||||
gz->where = __LINE__;
|
||||
gz->error = ENOEXEC;
|
||||
return ENOEXEC;
|
||||
} else if (i) {
|
||||
gz->where = __LINE__;
|
||||
gz->error = i;
|
||||
return ENOEXEC;
|
||||
}
|
||||
if (gz->file_offset < sizeof gz->a_out) {
|
||||
q = (u_char *) gz->virtual_offset + gz->output - gz->file_offset;
|
||||
bcopy(&gz->a_out, q, sizeof gz->a_out - gz->file_offset);
|
||||
}
|
||||
}
|
||||
}
|
||||
/* Skip over zero-padded first PAGE if needed */
|
||||
if (gz->output < gz->file_offset && (gz->output + siz) > gz->file_offset) {
|
||||
i = min(siz, gz->file_offset - gz->output);
|
||||
gz->output += i;
|
||||
p += i;
|
||||
siz -= i;
|
||||
}
|
||||
if (gz->output >= gz->file_offset && gz->output < gz->file_end) {
|
||||
i = min(siz, gz->file_end - gz->output);
|
||||
q = (u_char *) gz->virtual_offset + gz->output - gz->file_offset;
|
||||
bcopy(p, q, i);
|
||||
gz->output += i;
|
||||
p += i;
|
||||
siz -= i;
|
||||
}
|
||||
gz->output += siz;
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Tell kern_execve.c about it, with a little help from the linker.
|
||||
* Since `const' objects end up in the text segment, TEXT_SET is the
|
||||
* correct directive to use.
|
||||
*/
|
||||
static const struct execsw gzip_execsw = { exec_gzip_imgact, "gzip" };
|
||||
TEXT_SET(execsw_set, gzip_execsw);
|
||||
|
||||
static const struct execsw gzip_execsw = {exec_gzip_imgact, "gzip"};
|
||||
TEXT_SET(execsw_set, gzip_execsw);
|
||||
|
||||
1474
sys/kern/inflate.c
1474
sys/kern/inflate.c
File diff suppressed because it is too large
Load Diff
@ -1,85 +1,53 @@
|
||||
/*
|
||||
* 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
|
||||
* <phk@login.dkuug.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 $
|
||||
* $Id$
|
||||
*
|
||||
* 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_
|
||||
#ifndef _SYS_INFLATE_H_
|
||||
#define _SYS_INFLATE_H_
|
||||
|
||||
#ifdef KERNEL
|
||||
|
||||
#include <sys/param.h>
|
||||
#include <sys/imgact.h>
|
||||
#include <sys/imgact_aout.h>
|
||||
#define GZ_EOF -1
|
||||
|
||||
|
||||
/* 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;
|
||||
};
|
||||
#define GZ_WSIZE 0x8000
|
||||
|
||||
/*
|
||||
* 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;
|
||||
struct inflate {
|
||||
/* Public part */
|
||||
|
||||
/* This pointer is passed along to the two functions below */
|
||||
void *gz_private;
|
||||
|
||||
/* Fetch next character to be uncompressed */
|
||||
int (*gz_input) (void *);
|
||||
|
||||
/* Dispose of uncompressed characters */
|
||||
int (*gz_output) (void *, u_char *, u_long);
|
||||
|
||||
/* Private part */
|
||||
u_long 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;
|
||||
u_char *gz_slide;
|
||||
unsigned gz_wp;
|
||||
};
|
||||
|
||||
int inflate __P((struct gzip *, struct gz_global *));
|
||||
int do_aout_hdr __P((struct gzip *));
|
||||
int inflate __P((struct inflate *));
|
||||
|
||||
#define slide (gz->gz_slide)
|
||||
#define wp (gz->gz_wp)
|
||||
#endif /* KERNEL */
|
||||
|
||||
#endif /* KERNEL */
|
||||
|
||||
#endif /* ! _SYS_INFLATE_H_ */
|
||||
#endif /* ! _SYS_INFLATE_H_ */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user