mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-04-01 05:18:45 +00:00
5e8ae2d5bc
Continuous Integration (via runit and runitd) is now re-enabled on win7 and win10. The `make test` command, which runs the tests on all systems is now the fastest and most stable it's been since the project started. UBSAN is now enabled in MODE=dbg in addition to ASAN. Many instances of undefined behavior have been removed. Mostly things like passing a NULL argument to memcpy(), which works fine with Cosmopolitan Libc, but that doesn't prevents the compiler from being unhappy. There was an issue w/ GNU make where static analysis claims a sprintf() call can overflow. We also now have nicer looking crash reports on Windows since uname should now be supported and msys64 addr2line works reliably.
504 lines
19 KiB
C
504 lines
19 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
||
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
||
╞══════════════════════════════════════════════════════════════════════════════╡
|
||
│ Copyright 2020 Justine Alexandra Roberts Tunney │
|
||
│ │
|
||
│ Permission to use, copy, modify, and/or distribute this software for │
|
||
│ any purpose with or without fee is hereby granted, provided that the │
|
||
│ above copyright notice and this permission notice appear in all copies. │
|
||
│ │
|
||
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
|
||
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
|
||
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
|
||
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
|
||
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
|
||
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
|
||
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
|
||
│ PERFORMANCE OF THIS SOFTWARE. │
|
||
╚─────────────────────────────────────────────────────────────────────────────*/
|
||
#include "libc/bits/bits.h"
|
||
#include "libc/bits/safemacros.internal.h"
|
||
#include "libc/calls/calls.h"
|
||
#include "libc/calls/struct/stat.h"
|
||
#include "libc/fmt/conv.h"
|
||
#include "libc/log/check.h"
|
||
#include "libc/log/log.h"
|
||
#include "libc/mem/mem.h"
|
||
#include "libc/nexgen32e/crc32.h"
|
||
#include "libc/nt/struct/filetime.h"
|
||
#include "libc/runtime/gc.internal.h"
|
||
#include "libc/stdio/stdio.h"
|
||
#include "libc/str/str.h"
|
||
#include "libc/sysv/consts/map.h"
|
||
#include "libc/sysv/consts/o.h"
|
||
#include "libc/sysv/consts/prot.h"
|
||
#include "libc/x/x.h"
|
||
#include "libc/zip.h"
|
||
#include "tool/decode/lib/asmcodegen.h"
|
||
#include "tool/decode/lib/disassemblehex.h"
|
||
#include "tool/decode/lib/flagger.h"
|
||
#include "tool/decode/lib/idname.h"
|
||
#include "tool/decode/lib/ntfileflagnames.h"
|
||
#include "tool/decode/lib/titlegen.h"
|
||
#include "tool/decode/lib/zipnames.h"
|
||
|
||
/**
|
||
* @fileoverview Zip File Disassembler.
|
||
*/
|
||
|
||
nodiscard char *FormatDosDate(uint16_t dosdate) {
|
||
return xasprintf("%04u-%02u-%02u", ((dosdate >> 9) & 0b1111111) + 1980,
|
||
(dosdate >> 5) & 0b1111, dosdate & 0b11111);
|
||
}
|
||
|
||
nodiscard char *FormatDosTime(uint16_t dostime) {
|
||
return xasprintf("%02u:%02u:%02u", (dostime >> 11) & 0b11111,
|
||
(dostime >> 5) & 0b111111, (dostime << 1) & 0b111110);
|
||
}
|
||
|
||
void AdvancePosition(uint8_t *map, size_t *pos, size_t off) {
|
||
CHECK_GE(off, *pos);
|
||
if (off > *pos) {
|
||
printf("\n/\t<%s>\n", "LIMBO");
|
||
disassemblehex(&map[*pos], off - *pos, stdout);
|
||
printf("/\t</%s>\n", "LIMBO");
|
||
}
|
||
*pos = off;
|
||
}
|
||
|
||
void ShowGeneralFlag(uint16_t generalflag) {
|
||
puts("\
|
||
/ ┌─utf8\n\
|
||
/ │ ┌─strong encryption\n\
|
||
/ │ │┌─compressed patch data\n\
|
||
/ │ ││ ┌─crc and size go after file content\n\
|
||
/ │ ││ │┌─{normal,max,fast,superfast}\n\
|
||
/ │ ││ ││ ┌─encrypted\n\
|
||
/ rrrr│uuuu││r│├┐│");
|
||
show(".short", format(b1, "0b%016b", generalflag), "generalflag");
|
||
}
|
||
|
||
void ShowTimestamp(uint16_t time, uint16_t date) {
|
||
show(".short", format(b1, "%#04hx", time),
|
||
gc(xasprintf("%s (%s)", "lastmodifiedtime", gc(FormatDosTime(time)))));
|
||
show(".short", format(b1, "%#04hx", date),
|
||
gc(xasprintf("%s (%s)", "lastmodifieddate", gc(FormatDosDate(date)))));
|
||
}
|
||
|
||
void ShowCompressionMethod(uint16_t compressmethod) {
|
||
show(".short",
|
||
firstnonnull(findnamebyid(kZipCompressionNames, compressmethod),
|
||
format(b1, "%hu", compressmethod)),
|
||
"compressionmethod");
|
||
}
|
||
|
||
void ShowNtfs(uint8_t *ntfs, size_t n) {
|
||
struct timespec mtime, atime, ctime;
|
||
mtime = WindowsTimeToTimeSpec(READ64LE(ntfs + 8));
|
||
atime = WindowsTimeToTimeSpec(READ64LE(ntfs + 16));
|
||
ctime = WindowsTimeToTimeSpec(READ64LE(ntfs + 24));
|
||
show(".long", gc(xasprintf("%d", READ32LE(ntfs))), "ntfs reserved");
|
||
show(".short", gc(xasprintf("0x%04x", READ16LE(ntfs + 4))),
|
||
"ntfs attribute tag value #1");
|
||
show(".short", gc(xasprintf("%hu", READ16LE(ntfs + 6))),
|
||
"ntfs attribute tag size");
|
||
show(".quad", gc(xasprintf("%lu", READ64LE(ntfs + 8))),
|
||
gc(xasprintf("%s (%s)", "ntfs last modified time",
|
||
gc(xiso8601(&mtime)))));
|
||
show(".quad", gc(xasprintf("%lu", READ64LE(ntfs + 16))),
|
||
gc(xasprintf("%s (%s)", "ntfs last access time", gc(xiso8601(&atime)))));
|
||
show(".quad", gc(xasprintf("%lu", READ64LE(ntfs + 24))),
|
||
gc(xasprintf("%s (%s)", "ntfs creation time", gc(xiso8601(&ctime)))));
|
||
}
|
||
|
||
void ShowExtendedTimestamp(uint8_t *p, size_t n, bool islocal) {
|
||
int flag;
|
||
if (n) {
|
||
--n;
|
||
flag = *p++;
|
||
show(".byte", gc(xasprintf("0b%03hhb", flag)), "fields present in local");
|
||
if ((flag & 1) && n >= 4) {
|
||
show(".long", gc(xasprintf("%u", READ32LE(p))),
|
||
gc(xasprintf("%s (%s)", "last modified",
|
||
gc(xiso8601(&(struct timespec){READ32LE(p)})))));
|
||
p += 4;
|
||
n -= 4;
|
||
}
|
||
flag >>= 1;
|
||
if (islocal) {
|
||
if ((flag & 1) && n >= 4) {
|
||
show(".long", gc(xasprintf("%u", READ32LE(p))),
|
||
gc(xasprintf("%s (%s)", "access time",
|
||
gc(xiso8601(&(struct timespec){READ32LE(p)})))));
|
||
p += 4;
|
||
n -= 4;
|
||
}
|
||
flag >>= 1;
|
||
if ((flag & 1) && n >= 4) {
|
||
show(".long", gc(xasprintf("%u", READ32LE(p))),
|
||
gc(xasprintf("%s (%s)", "creation time",
|
||
gc(xiso8601(&(struct timespec){READ32LE(p)})))));
|
||
p += 4;
|
||
n -= 4;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
void ShowZip64(uint8_t *p, size_t n, bool islocal) {
|
||
if (n >= 8) {
|
||
show(".quad", gc(xasprintf("%lu", READ64LE(p))),
|
||
gc(xasprintf("uncompressed size (%,ld)", READ64LE(p))));
|
||
}
|
||
if (n >= 16) {
|
||
show(".quad", gc(xasprintf("%lu", READ64LE(p + 8))),
|
||
gc(xasprintf("compressed size (%,ld)", READ64LE(p + 8))));
|
||
}
|
||
if (n >= 24) {
|
||
show(".quad", gc(xasprintf("%lu", READ64LE(p + 16))),
|
||
gc(xasprintf("lfile hdr offset (%,ld)", READ64LE(p + 16))));
|
||
}
|
||
if (n >= 28) {
|
||
show(".long", gc(xasprintf("%u", READ32LE(p + 24))), "disk number");
|
||
}
|
||
}
|
||
|
||
void ShowInfoZipNewUnixExtra(uint8_t *p, size_t n, bool islocal) {
|
||
if (p[0] == 1 && p[1] == 4 && p[6] == 4) {
|
||
show(".byte", "1", "version");
|
||
show(".byte", "4", "uid length");
|
||
show(".long", gc(xasprintf("%u", READ32LE(p + 2))), "uid");
|
||
show(".byte", "4", "gid length");
|
||
show(".long", gc(xasprintf("%u", READ32LE(p + 7))), "gid");
|
||
} else {
|
||
disassemblehex(p, n, stdout);
|
||
}
|
||
}
|
||
|
||
void ShowExtra(uint8_t *extra, bool islocal) {
|
||
switch (ZIP_EXTRA_HEADERID(extra)) {
|
||
case kZipExtraNtfs:
|
||
ShowNtfs(ZIP_EXTRA_CONTENT(extra), ZIP_EXTRA_CONTENTSIZE(extra));
|
||
break;
|
||
case kZipExtraExtendedTimestamp:
|
||
ShowExtendedTimestamp(ZIP_EXTRA_CONTENT(extra),
|
||
ZIP_EXTRA_CONTENTSIZE(extra), islocal);
|
||
break;
|
||
case kZipExtraZip64:
|
||
ShowZip64(ZIP_EXTRA_CONTENT(extra), ZIP_EXTRA_CONTENTSIZE(extra),
|
||
islocal);
|
||
break;
|
||
case kZipExtraInfoZipNewUnixExtra:
|
||
ShowInfoZipNewUnixExtra(ZIP_EXTRA_CONTENT(extra),
|
||
ZIP_EXTRA_CONTENTSIZE(extra), islocal);
|
||
break;
|
||
default:
|
||
disassemblehex(ZIP_EXTRA_CONTENT(extra), ZIP_EXTRA_CONTENTSIZE(extra),
|
||
stdout);
|
||
break;
|
||
}
|
||
}
|
||
|
||
void ShowExternalAttributes(uint8_t *cf) {
|
||
uint32_t ea;
|
||
ea = ZIP_CFILE_EXTERNALATTRIBUTES(cf);
|
||
if (ZIP_CFILE_FILEATTRCOMPAT(cf) == kZipOsUnix) {
|
||
show(".short", RecreateFlags(kNtFileFlagNames, ea & 0xffff),
|
||
"dos file flags");
|
||
show(".short", format(b1, "%#o", ea >> 16), "st_mode");
|
||
} else {
|
||
show(".long", RecreateFlags(kNtFileFlagNames, ea), "externalattributes");
|
||
}
|
||
}
|
||
|
||
void ShowExtras(uint8_t *extras, uint16_t extrassize, bool islocal) {
|
||
int i;
|
||
bool first;
|
||
uint8_t *p, *pe;
|
||
if (extrassize) {
|
||
first = true;
|
||
for (p = extras, pe = extras + extrassize, i = 0; p < pe;
|
||
p += ZIP_EXTRA_SIZE(p), ++i) {
|
||
show(".short",
|
||
firstnonnull(findnamebyid(kZipExtraNames, ZIP_EXTRA_HEADERID(p)),
|
||
gc(xasprintf("0x%04hx", ZIP_EXTRA_HEADERID(p)))),
|
||
gc(xasprintf("%s[%d].%s", "extras", i, "headerid")));
|
||
show(".short", gc(xasprintf("%df-%df", (i + 2) * 10, (i + 1) * 10)),
|
||
gc(xasprintf("%s[%d].%s (%hd %s)", "extras", i, "contentsize",
|
||
ZIP_EXTRA_CONTENTSIZE(p), "bytes")));
|
||
if (first) {
|
||
first = false;
|
||
printf("%d:", (i + 1) * 10);
|
||
}
|
||
ShowExtra(p, islocal);
|
||
printf("%d:", (i + 2) * 10);
|
||
}
|
||
}
|
||
putchar('\n');
|
||
}
|
||
|
||
void ShowLocalFileHeader(uint8_t *lf, uint16_t idx) {
|
||
printf("\n/\t%s #%hu (%zu %s)\n", "local file", idx + 1,
|
||
ZIP_LFILE_HDRSIZE(lf), "bytes");
|
||
show(".ascii", format(b1, "%`'.*s", 4, lf), "magic");
|
||
show(".byte",
|
||
firstnonnull(findnamebyid(kZipEraNames, ZIP_LFILE_VERSIONNEED(lf)),
|
||
gc(xasprintf("%d", ZIP_LFILE_VERSIONNEED(lf)))),
|
||
"pkzip version need");
|
||
show(".byte",
|
||
firstnonnull(findnamebyid(kZipOsNames, ZIP_LFILE_OSNEED(lf)),
|
||
gc(xasprintf("%d", ZIP_LFILE_OSNEED(lf)))),
|
||
"os need");
|
||
ShowGeneralFlag(ZIP_LFILE_GENERALFLAG(lf));
|
||
ShowCompressionMethod(ZIP_LFILE_COMPRESSIONMETHOD(lf));
|
||
ShowTimestamp(ZIP_LFILE_LASTMODIFIEDTIME(lf), ZIP_LFILE_LASTMODIFIEDDATE(lf));
|
||
show(
|
||
".long",
|
||
format(b1, "%#x", ZIP_LFILE_CRC32(lf)), gc(xasprintf("%s (%#x)", "crc32z", GetZipLfileCompressedSize(lf) /* crc32_z(0, ZIP_LFILE_CONTENT(lf), GetZipLfileCompressedSize(lf)) */)));
|
||
if (ZIP_LFILE_COMPRESSEDSIZE(lf) == 0xFFFFFFFF) {
|
||
show(".long", "0xFFFFFFFF", "compressedsize (zip64)");
|
||
} else {
|
||
show(".long", "3f-2f",
|
||
format(b1, "%s (%u %s)", "compressedsize",
|
||
ZIP_LFILE_COMPRESSEDSIZE(lf), "bytes"));
|
||
}
|
||
show(".long",
|
||
ZIP_LFILE_UNCOMPRESSEDSIZE(lf) == 0xFFFFFFFF
|
||
? "0xFFFFFFFF"
|
||
: format(b1, "%u", ZIP_LFILE_UNCOMPRESSEDSIZE(lf)),
|
||
"uncompressedsize");
|
||
show(".short", "1f-0f",
|
||
format(b1, "%s (%hu %s)", "namesize", ZIP_LFILE_NAMESIZE(lf), "bytes"));
|
||
show(
|
||
".short", "2f-1f",
|
||
format(b1, "%s (%hu %s)", "extrasize", ZIP_LFILE_EXTRASIZE(lf), "bytes"));
|
||
printf("0:");
|
||
show(".ascii",
|
||
format(b1, "%`'s",
|
||
gc(strndup(ZIP_LFILE_NAME(lf), ZIP_LFILE_NAMESIZE(lf)))),
|
||
"name");
|
||
printf("1:");
|
||
ShowExtras(ZIP_LFILE_EXTRA(lf), ZIP_LFILE_EXTRASIZE(lf), true);
|
||
printf("2:");
|
||
/* disassemblehex(ZIP_LFILE_CONTENT(lf), ZIP_LFILE_COMPRESSEDSIZE(lf),
|
||
* stdout); */
|
||
printf("3:\n");
|
||
}
|
||
|
||
void ShowCentralFileHeader(uint8_t *cf) {
|
||
printf("\n/\t%s (%zu %s)\n", "central directory file header",
|
||
ZIP_CFILE_HDRSIZE(cf), "bytes");
|
||
show(".ascii", format(b1, "%`'.*s", 4, cf), "magic");
|
||
show(".byte", gc(xasprintf("%d", ZIP_CFILE_VERSIONMADE(cf))),
|
||
"zip version made");
|
||
show(".byte",
|
||
firstnonnull(findnamebyid(kZipOsNames, ZIP_CFILE_FILEATTRCOMPAT(cf)),
|
||
gc(xasprintf("%d", ZIP_CFILE_FILEATTRCOMPAT(cf)))),
|
||
"file attr compat");
|
||
show(".byte",
|
||
firstnonnull(findnamebyid(kZipEraNames, ZIP_CFILE_VERSIONNEED(cf)),
|
||
gc(xasprintf("%d", ZIP_CFILE_VERSIONNEED(cf)))),
|
||
"pkzip version need");
|
||
show(".byte",
|
||
firstnonnull(findnamebyid(kZipOsNames, ZIP_CFILE_OSNEED(cf)),
|
||
gc(xasprintf("%d", ZIP_CFILE_OSNEED(cf)))),
|
||
"os need");
|
||
ShowGeneralFlag(ZIP_CFILE_GENERALFLAG(cf));
|
||
ShowCompressionMethod(ZIP_CFILE_COMPRESSIONMETHOD(cf));
|
||
ShowTimestamp(ZIP_CFILE_LASTMODIFIEDTIME(cf), ZIP_CFILE_LASTMODIFIEDDATE(cf));
|
||
show(".long", format(b1, "%#x", ZIP_CFILE_CRC32(cf)), "crc32z");
|
||
if (ZIP_CFILE_COMPRESSEDSIZE(cf) == 0xFFFFFFFF) {
|
||
show(".long", "0xFFFFFFFF", "compressedsize (zip64)");
|
||
} else {
|
||
show(".long", format(b1, "%u", ZIP_CFILE_COMPRESSEDSIZE(cf)),
|
||
"compressedsize");
|
||
}
|
||
if (ZIP_CFILE_UNCOMPRESSEDSIZE(cf) == 0xFFFFFFFF) {
|
||
show(".long", "0xFFFFFFFF", "compressedsize (zip64)");
|
||
} else {
|
||
show(".long", format(b1, "%u", ZIP_CFILE_UNCOMPRESSEDSIZE(cf)),
|
||
"uncompressedsize");
|
||
}
|
||
show(".short", "1f-0f",
|
||
format(b1, "%s (%hu %s)", "namesize", ZIP_CFILE_NAMESIZE(cf), "bytes"));
|
||
show(
|
||
".short", "2f-1f",
|
||
format(b1, "%s (%hu %s)", "extrasize", ZIP_CFILE_EXTRASIZE(cf), "bytes"));
|
||
show(".short", "3f-2f",
|
||
format(b1, "%s (%hu %s)", "commentsize", ZIP_CFILE_COMMENTSIZE(cf),
|
||
"bytes"));
|
||
show(".short", format(b1, "%hu", ZIP_CFILE_DISK(cf)), "disk");
|
||
show(".short",
|
||
RecreateFlags(kZipIattrNames, ZIP_CFILE_INTERNALATTRIBUTES(cf) & 1),
|
||
"internalattributes");
|
||
ShowExternalAttributes(cf);
|
||
if (ZIP_CFILE_OFFSET(cf) == 0xFFFFFFFF) {
|
||
show(".long", "0xFFFFFFFF", "lfile hdr offset (zip64)");
|
||
} else {
|
||
show(".long", format(b1, "%u", ZIP_CFILE_OFFSET(cf)), "lfile hdr offset");
|
||
}
|
||
printf("0:");
|
||
show(".ascii",
|
||
format(b1, "%`'s",
|
||
gc(strndup(ZIP_CFILE_NAME(cf), ZIP_CFILE_NAMESIZE(cf)))),
|
||
"name");
|
||
printf("1:");
|
||
ShowExtras(ZIP_CFILE_EXTRA(cf), ZIP_CFILE_EXTRASIZE(cf), false);
|
||
printf("2:");
|
||
show(".ascii",
|
||
format(b1, "%`'.*s", ZIP_CFILE_COMMENTSIZE(cf), ZIP_CFILE_COMMENT(cf)),
|
||
"comment");
|
||
printf("3:\n");
|
||
}
|
||
|
||
void ShowCentralDirHeader32(uint8_t *cd) {
|
||
printf("\n/\t%s (%zu %s)\n", "end of central directory header",
|
||
ZIP_CDIR_HDRSIZE(cd), "bytes");
|
||
show(".ascii", format(b1, "%`'.*s", 4, cd), "magic");
|
||
show(".short", format(b1, "%hd", ZIP_CDIR_DISK(cd)), "disk");
|
||
show(".short", format(b1, "%hd", ZIP_CDIR_STARTINGDISK(cd)), "startingdisk");
|
||
show(".short", format(b1, "%hu", ZIP_CDIR_RECORDSONDISK(cd)),
|
||
"recordsondisk");
|
||
show(".short", format(b1, "%hu", ZIP_CDIR_RECORDS(cd)), "records");
|
||
show(".long", format(b1, "%u", ZIP_CDIR_SIZE(cd)), "size");
|
||
show(".long", format(b1, "%u", ZIP_CDIR_OFFSET(cd)), "cfile hdrs offset");
|
||
show(".short", "1f-0f",
|
||
format(b1, "%s (%hu %s)", "commentsize", ZIP_CDIR_COMMENTSIZE(cd),
|
||
"bytes"));
|
||
printf("0:");
|
||
disassemblehex(ZIP_CDIR_COMMENT(cd), ZIP_CDIR_COMMENTSIZE(cd), stdout);
|
||
printf("1:\n");
|
||
}
|
||
|
||
void ShowCentralDirHeader64(uint8_t *cd) {
|
||
printf("\n/\t%s (%zu %s)\n", "zip64 end of central directory header",
|
||
ZIP_CDIR64_HDRSIZE(cd), "bytes");
|
||
show(".ascii", format(b1, "%`'.*s", 4, cd), "magic");
|
||
show(".quad", format(b1, "%lu", ZIP_CDIR64_HDRSIZE(cd) - 12), "hdr size");
|
||
show(".short", format(b1, "%hd", ZIP_CDIR64_VERSIONMADE(cd)), "version made");
|
||
show(".short", format(b1, "%hd", ZIP_CDIR64_VERSIONNEED(cd)), "version need");
|
||
show(".long", format(b1, "%d", ZIP_CDIR64_DISK(cd)), "disk");
|
||
show(".long", format(b1, "%d", ZIP_CDIR64_STARTINGDISK(cd)), "startingdisk");
|
||
show(".quad", format(b1, "%lu", ZIP_CDIR64_RECORDSONDISK(cd)),
|
||
"recordsondisk");
|
||
show(".quad", format(b1, "%lu", ZIP_CDIR64_RECORDS(cd)), "records");
|
||
show(".quad", format(b1, "%lu", ZIP_CDIR64_SIZE(cd)), "cdir size");
|
||
show(".quad", format(b1, "%lu", ZIP_CDIR64_OFFSET(cd)), "cdir offset");
|
||
printf("0:");
|
||
disassemblehex(ZIP_CDIR64_COMMENT(cd), ZIP_CDIR64_COMMENTSIZE(cd), stdout);
|
||
printf("1:\n");
|
||
cd += ZIP_CDIR64_HDRSIZE(cd);
|
||
printf("\n/\t%s (%zu %s)\n", "zip64 end of central directory locator",
|
||
kZipCdir64LocatorSize, "bytes");
|
||
show(".ascii", format(b1, "%`'.*s", 4, cd), "magic");
|
||
show(".long", format(b1, "%d", READ32LE(cd + 4)), "startingdisk");
|
||
show(".quad", format(b1, "%lu", READ64LE(cd + 4 + 4)), "eocd64 offset");
|
||
show(".long", format(b1, "%d", READ32LE(cd + 4 + 4 + 8)), "totaldisks");
|
||
}
|
||
|
||
uint8_t *GetZipCdir32(const uint8_t *p, size_t n) {
|
||
size_t i;
|
||
if (n >= kZipCdirHdrMinSize) {
|
||
i = n - kZipCdirHdrMinSize;
|
||
do {
|
||
if (READ32LE(p + i) == kZipCdirHdrMagic && IsZipCdir32(p, n, i)) {
|
||
return (/*unconst*/ uint8_t *)(p + i);
|
||
}
|
||
} while (i--);
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
uint8_t *GetZipCdir64(const uint8_t *p, size_t n) {
|
||
uint64_t i, j;
|
||
if (n >= kZipCdir64LocatorSize) {
|
||
i = n - kZipCdir64LocatorSize;
|
||
do {
|
||
if (READ32LE(p + i) == kZipCdir64LocatorMagic &&
|
||
(j = ZIP_LOCATE64_OFFSET(p + i)) + kZipCdir64HdrMinSize <= n) {
|
||
return p + j;
|
||
}
|
||
} while (i--);
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
void DisassembleZip(const char *path, uint8_t *p, size_t n) {
|
||
size_t pos;
|
||
uint16_t i;
|
||
static int records;
|
||
uint8_t *eocd32, *eocd64, *cdir, *cf, *lf, *q;
|
||
if (endswith(path, ".com.dbg") && (q = memmem(p, n, "MZqFpD", 6))) {
|
||
n -= q - p;
|
||
p += q - p;
|
||
}
|
||
eocd32 = GetZipCdir32(p, n);
|
||
eocd64 = GetZipCdir64(p, n);
|
||
CHECK(eocd32 || eocd64);
|
||
pos = 0;
|
||
if (eocd64) {
|
||
records = ZIP_CDIR64_RECORDS(eocd64);
|
||
cdir = p + ZIP_CDIR64_OFFSET(eocd64);
|
||
} else {
|
||
records = ZIP_CDIR_RECORDS(eocd32);
|
||
cdir = p + ZIP_CDIR_OFFSET(eocd32);
|
||
}
|
||
for (i = 0, cf = cdir; i < records; ++i, cf += ZIP_CFILE_HDRSIZE(cf)) {
|
||
lf = p + GetZipCfileOffset(cf);
|
||
CHECK_EQ(kZipLfileHdrMagic, ZIP_LFILE_MAGIC(lf));
|
||
AdvancePosition(p, &pos, lf - p);
|
||
ShowLocalFileHeader(lf, i);
|
||
pos = (lf - p) + ZIP_LFILE_SIZE(lf);
|
||
}
|
||
for (i = 0, cf = cdir; i < records; ++i, cf += ZIP_CFILE_HDRSIZE(cf)) {
|
||
CHECK_EQ(kZipCfileHdrMagic, ZIP_CFILE_MAGIC(cf));
|
||
AdvancePosition(p, &pos, cf - p);
|
||
ShowCentralFileHeader(cf);
|
||
pos = (cf - p) + ZIP_CFILE_HDRSIZE(cf);
|
||
}
|
||
/* TODO(jart): This is absurd. */
|
||
if (eocd32 && eocd64) {
|
||
if (eocd32 < eocd64) {
|
||
ShowCentralDirHeader32(eocd32);
|
||
AdvancePosition(p, &pos, eocd32 - p);
|
||
ShowCentralDirHeader64(eocd64);
|
||
AdvancePosition(p, &pos, eocd64 - p);
|
||
} else {
|
||
/* pos = eocd64 - p + ZIP_CDIR_HDRSIZE(eocd64); */
|
||
/* AdvancePosition(p, &pos, n); */
|
||
ShowCentralDirHeader64(eocd64);
|
||
AdvancePosition(p, &pos, eocd64 - p);
|
||
/* pos = eocd32 - p + ZIP_CDIR_HDRSIZE(eocd32); */
|
||
/* AdvancePosition(p, &pos, n); */
|
||
ShowCentralDirHeader32(eocd32);
|
||
AdvancePosition(p, &pos, eocd32 - p);
|
||
}
|
||
} else if (eocd32) {
|
||
ShowCentralDirHeader32(eocd32);
|
||
AdvancePosition(p, &pos, eocd32 - p);
|
||
} else {
|
||
ShowCentralDirHeader64(eocd64);
|
||
AdvancePosition(p, &pos, eocd64 - p);
|
||
}
|
||
pos = n;
|
||
AdvancePosition(p, &pos, n);
|
||
}
|
||
|
||
int main(int argc, char *argv[]) {
|
||
int fd;
|
||
uint8_t *map;
|
||
struct stat st;
|
||
ShowCrashReports();
|
||
CHECK_EQ(2, argc);
|
||
CHECK_NE(-1, (fd = open(argv[1], O_RDONLY)));
|
||
CHECK_NE(-1, fstat(fd, &st));
|
||
CHECK_GE(st.st_size, kZipCdirHdrMinSize);
|
||
CHECK_NE(MAP_FAILED,
|
||
(map = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0)));
|
||
showtitle("αcτµαlly pδrταblε εxεcµταblε", "tool/decode/zip",
|
||
basename(argv[1]), NULL, &kModelineAsm);
|
||
DisassembleZip(argv[1], map, st.st_size);
|
||
CHECK_NE(-1, munmap(map, st.st_size));
|
||
CHECK_NE(-1, close(fd));
|
||
return 0;
|
||
}
|