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ClamAV is an open source (GPLv2) anti-virus toolkit.
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clamav/libclamav/upack.c

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/*
* Copyright (C) 2007-2008 Sourcefire, Inc.
*
* Authors: Michal 'GiM' Spadlinski
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
#if HAVE_CONFIG_H
#include "clamav-config.h"
#endif
#include <stdio.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include "cltypes.h"
#include "pe.h"
#include "rebuildpe.h"
#include "others.h"
#include "upack.h"
#include "mew.h"
#define EC32(x) le32_to_host(x) /* Convert little endian to host */
#define CE32(x) be32_to_host(x) /* Convert big endian to host */
int unupack399(char *, uint32_t, uint32_t, char *, uint32_t, char *, char *, uint32_t, char *);
enum { UPACK_399, UPACK_11_12, UPACK_0151477, UPACK_0297729 };
int unupack(int upack, char *dest, uint32_t dsize, char *buff, uint32_t vma, uint32_t ep, uint32_t base, uint32_t va, int file)
{
int j, searchval;
char *loc_esi, *loc_edi = NULL, *loc_ebx, *end_edi, *save_edi, *alvalue;
char *paddr, *pushed_esi, *save2;
uint32_t save1, save3, loc_ecx, count, shlsize, original_ep, ret, loc_ebx_u;
struct cli_exe_section section;
int upack_version = UPACK_399;
/* buff [168 bytes] doesn't have to be checked, since it was checked in pe.c */
if (upack)
{
uint32_t aljump, shroff, lngjmpoff;
/* dummy characteristics ;/ */
if (buff[5] == '\xff' && buff[6] == '\x36')
upack_version = UPACK_0297729;
loc_esi = dest + (cli_readint32(buff + 1) - vma);
if (!CLI_ISCONTAINED(dest, dsize, loc_esi, 12))
return -1;
original_ep = cli_readint32(loc_esi);
loc_esi += 4;
/*cli_readint32(loc_esi);*/
loc_esi += 4;
original_ep -= vma;
cli_dbgmsg("Upack: EP: %08x original: %08X || %08x\n", ep, original_ep, cli_readint32(loc_esi-8));
if (upack_version == UPACK_399)
{
/* jmp 1 */
loc_edi = dest + (cli_readint32(loc_esi) - vma);
if (!CLI_ISCONTAINED(dest, dsize, dest+ep+0xa, 2) || dest[ep+0xa] != '\xeb')
return -1;
loc_esi = dest + *(dest + ep + 0xb) + ep + 0xc;
/* use this as a temp var */
/* jmp 2 + 0xa */
alvalue = loc_esi+0x1a;
if (!CLI_ISCONTAINED(dest, dsize, alvalue, 2) || *alvalue != '\xeb')
return -1;
alvalue++;
alvalue += (*alvalue&0xff) + 1 + 0xa;
lngjmpoff = 8;
} else {
if (!CLI_ISCONTAINED(dest, dsize, dest+ep+7, 5) || dest[ep+7] != '\xe9')
return -1;
loc_esi = dest + cli_readint32(dest + ep + 8) + ep + 0xc;
alvalue = loc_esi + 0x25;
lngjmpoff = 10;
}
if (!CLI_ISCONTAINED(dest, dsize, alvalue, 2) || *alvalue != '\xb5')
return -1;
alvalue++;
count = *alvalue&0xff;
if (!CLI_ISCONTAINED(dest, dsize, alvalue, lngjmpoff+5) || *(alvalue+lngjmpoff) != '\xe9')
return -1;
/* use this as a temp to make a long jmp to head of unpacking proc */
shlsize = cli_readint32(alvalue + lngjmpoff+1);
/* upack_399 + upack_0151477 */
if (upack_version == UPACK_399)
shlsize = shlsize + (loc_esi - dest) + *(loc_esi+0x1b) + 0x1c + 0x018; /* read checked above */
else
/* there is no additional jump in upack_0297729 */
shlsize = shlsize + (loc_esi - dest) + 0x035;
/* do the jump, 43 - point to jecxz */
alvalue = dest+shlsize+43;
/* 0.39 */
aljump = 8;
shroff = 24;
if (!CLI_ISCONTAINED(dest, dsize, alvalue-1, 2) || *(alvalue-1) != '\xe3')
{
/* in upack_0297729 and upack_0151477 jecxz is at offset: 46 */
alvalue = dest+shlsize+46;
if (!CLI_ISCONTAINED(dest, dsize, alvalue-1, 2) || *(alvalue-1) != '\xe3')
return -1;
else {
if (upack_version != UPACK_0297729)
upack_version = UPACK_0151477;
aljump = 7;
shroff = 26;
}
}
/* do jecxz */
alvalue += (*alvalue&0xff) + 1;
/* is there a long jump ? */
if (!CLI_ISCONTAINED(dest, dsize, alvalue, aljump+5) || *(alvalue+aljump) != '\xe9')
return -1;
/* do jmp, 1+4 - size of jmp instruction, aljump - instruction offset, 27 offset to cmp al,xx*/
ret = cli_readint32(alvalue+aljump+1);
alvalue += ret + aljump+1+4 + 27;
if (upack_version == UPACK_0297729)
alvalue += 2;
/* shr ebp */
if (!CLI_ISCONTAINED(dest, dsize, dest+shlsize+shroff, 3) || *(dest+shlsize+shroff) != '\xc1' || *(dest+shlsize+shroff+1) != '\xed')
return -1;
shlsize = (*(dest + shlsize + shroff+2))&0xff;
count *= 0x100;
if (shlsize < 2 || shlsize > 8)
{
cli_dbgmsg ("Upack: context bits out of bounds\n");
return -1;
}
cli_dbgmsg("Upack: Context Bits parameter used with lzma: %02x, %02x\n", shlsize, count);
/* check if loc_esi + .. == 0xbe -> mov esi */
/* upack_0297729 has mov esi, .. + mov edi, .., in upack_0151477 and upack_399 EDI has been already set before */
if (upack_version == UPACK_0297729)
{
if (!CLI_ISCONTAINED(dest, dsize, loc_esi+6, 10) || *(loc_esi+6) != '\xbe' || *(loc_esi+11) != '\xbf')
return -1;
if ((uint32_t)cli_readint32(loc_esi + 7) < base || (uint32_t)cli_readint32(loc_esi+7) > vma)
return -1;
loc_edi = dest + (cli_readint32(loc_esi + 12) - vma);
loc_esi = dest + (cli_readint32(loc_esi + 7) - base);
} else {
if (!CLI_ISCONTAINED(dest, dsize, loc_esi+7, 5) || *(loc_esi+7) != '\xbe')
return -1;
loc_esi = dest + (cli_readint32(loc_esi + 8) - vma);
}
if (upack_version == UPACK_0297729)
{
/* 0x16*4=0x58, 6longs*4 = 24, 0x64-last loc_esi read location */
if (!CLI_ISCONTAINED(dest, dsize, loc_edi, (0x58 + 24 + 4*count)) || !CLI_ISCONTAINED(dest, dsize, loc_esi, (0x58 + 0x64 + 4)))
return -1;
/* XXX I don't know if this [0x16] is constant number, not enough samples provided */
for (j=0; j<0x16; j++, loc_esi+=4, loc_edi+=4)
cli_writeint32(loc_edi, cli_readint32(loc_esi));
} else {
/* 0x27*4=0x9c, 6longs*4 = 24, 0x34-last loc_esi read location */
if (!CLI_ISCONTAINED(dest, dsize, loc_edi, (0x9c + 24 + 4*count)) || !CLI_ISCONTAINED(dest, dsize, loc_esi, (0x9c + 0x34 + 4)))
return -1;
for (j=0; j<0x27; j++, loc_esi+=4, loc_edi+=4)
cli_writeint32(loc_edi, cli_readint32(loc_esi));
}
save3 = cli_readint32(loc_esi + 4);
paddr = dest + ((uint32_t)cli_readint32(loc_edi - 4)) - vma;
loc_ebx = loc_edi;
cli_writeint32(loc_edi, 0xffffffff);
loc_edi+=4;
cli_writeint32(loc_edi, 0);
loc_edi+=4;
for (j=0; j<4; j++, loc_edi+=4)
cli_writeint32(loc_edi, (1));
for (j=0; (unsigned int)j<count; j++, loc_edi+=4)
cli_writeint32(loc_edi, 0x400);
loc_edi = dest + cli_readint32(loc_esi + 0xc) - vma;
if (upack_version == UPACK_0297729)
loc_edi = dest+vma-base; /* XXX not enough samples provided to be sure of it! */
pushed_esi = loc_edi;
end_edi = dest + cli_readint32(loc_esi + 0x34) - vma;
if (upack_version == UPACK_0297729)
{
end_edi = dest + cli_readint32(loc_esi + 0x64) - vma;
save3 = cli_readint32(loc_esi + 0x40);
}
/* begin end */
cli_dbgmsg("Upack: data initialized, before upack lzma call!\n");
if ((ret = (uint32_t)unupack399(dest, dsize, 0, loc_ebx, 0, loc_edi, end_edi, shlsize, paddr)) == 0xffffffff)
return -1;
/* alternative begin */
} else {
int ep_jmp_offs, rep_stosd_count_offs, context_bits_offs;
loc_esi = dest + vma + ep;
/* yet another dummy characteristics ;/ */
if (buff[0] == '\xbe' && buff[5] == '\xad' && buff[6] == '\x8b' && buff[7] == '\xf8')
upack_version = UPACK_11_12;
if (upack_version == UPACK_11_12)
{
ep_jmp_offs = 0x1a4;
rep_stosd_count_offs = 0x1b;
context_bits_offs = 0x41;
alvalue = loc_esi + 0x184;
} else {
ep_jmp_offs = 0x217;
rep_stosd_count_offs = 0x3a;
context_bits_offs = 0x5f;
alvalue = loc_esi + 0x1c1;
}
if (!CLI_ISCONTAINED(dest, dsize, loc_esi, ep_jmp_offs+4))
return -1;
save1 = cli_readint32(loc_esi + ep_jmp_offs);
original_ep = (loc_esi - dest) + ep_jmp_offs + 4;
original_ep += (int32_t)save1;
cli_dbgmsg("Upack: EP: %08x original %08x\n", ep, original_ep);
/* this are really ugly hacks,
* rep_stosd_count_offs & context_bits_offs are < ep_jmp_offs,
* so checked in CLI_ISCONTAINED above */
count = (*(loc_esi + rep_stosd_count_offs))&0xff;
shlsize = (*(loc_esi + context_bits_offs))&0xff;
shlsize = 8 - shlsize;
if (shlsize < 2 || shlsize > 8)
{
cli_dbgmsg ("Upack: context bits out of bounds\n");
return -1;
}
count *= 0x100;
cli_dbgmsg("Upack: Context Bits parameter used with lzma: %02x, %02x\n", shlsize, count);
if (upack_version == UPACK_399)
{
loc_esi += 4;
loc_ecx = cli_readint32(loc_esi+2);
cli_writeint32(loc_esi+2,0);
if (!loc_ecx)
{
cli_dbgmsg("Upack: something's wrong, report back\n");
return -1;/* XXX XXX XXX XXX */
}
loc_esi -= (loc_ecx - 2);
if (!CLI_ISCONTAINED(dest, dsize, loc_esi, 12))
return -1;
cli_dbgmsg("Upack: %p %p %08x %08x\n", loc_esi, dest, cli_readint32(loc_esi), base);
loc_ebx_u = loc_esi - (dest + cli_readint32(loc_esi) - base);
cli_dbgmsg("Upack: EBX: %08x\n", loc_ebx_u);
loc_esi += 4;
save2 = loc_edi = dest + cli_readint32(loc_esi) - base;
cli_dbgmsg("Upack: DEST: %08x, %08x\n", cli_readint32(loc_esi), cli_readint32(loc_esi) - base);
loc_esi += 4;
/* 2vGiM: j is signed. Is that really what you want? Will it cause problems with the following checks?
* yes! this is wrong! how did you notice that?!
*/
j = cli_readint32(loc_esi);
if (j<0)
{
cli_dbgmsg("Upack: probably hand-crafted data, report back\n");
return -1;
}
loc_esi += 4;
cli_dbgmsg("Upack: ecx counter: %08x\n", j);
if (!CLI_ISCONTAINED(dest, dsize, loc_esi, (j*4)) || !CLI_ISCONTAINED(dest, dsize, loc_edi, ((j+count)*4)))
return -1;
for (;j--; loc_edi+=4, loc_esi+=4)
cli_writeint32(loc_edi, cli_readint32(loc_esi));
if (!CLI_ISCONTAINED(dest, dsize, save2, 8))
return -1;
loc_ecx = cli_readint32(save2);
save2 += 4;
loc_esi = save2;
/* I could probably do simple loc_esi+= (0xe<<2),
* but I'm not sure if there is always 0xe and is always ebx =0
*/
do {
loc_esi += loc_ebx_u;
loc_esi += 4;
} while (--loc_ecx);
if (!CLI_ISCONTAINED(dest, dsize, loc_esi, 4))
return -1;
save1 = cli_readint32(loc_esi); /* loc_eax = 0x400 */
loc_esi += 4;
for (j=0; j<count; j++, loc_edi+=4) /* checked above */
cli_writeint32(loc_edi, (save1));
if (!CLI_ISCONTAINED(dest, dsize, (loc_esi+0x10), 4))
return -1;
cli_writeint32(loc_esi+0x10, (uint32_t)cli_readint32(loc_esi+0x10)+loc_ebx_u);
loc_ebx = loc_esi+0x14;
loc_esi = save2;
/* loc_ebx_u gets saved */
/* checked above, (...save2, 8) */
save_edi = loc_edi = dest + ((uint32_t)cli_readint32(loc_esi) - base);
loc_esi +=4;
cli_dbgmsg("Upack: before_fixing\n");
/* fix values */
if (!CLI_ISCONTAINED(dest, dsize, loc_ebx-4, (12 + 4*4)) || !CLI_ISCONTAINED(dest, dsize, loc_esi+0x24, 4) || !CLI_ISCONTAINED(dest, dsize, loc_esi+0x40, 4))
return -1;
for (j=2; j<6; j++)
cli_writeint32(loc_ebx+(j<<2), cli_readint32(loc_ebx+(j<<2)));
paddr = dest + cli_readint32(loc_ebx - 4) - base;
save1 = loc_ecx;
pushed_esi = loc_edi;
end_edi = dest + cli_readint32(loc_esi+0x24) - base;
vma = cli_readint32(loc_ebx); cli_writeint32(loc_ebx, cli_readint32(loc_ebx + 4)); cli_writeint32((loc_ebx + 4), vma);
/* Upack 1.1/1.2 is something between 0.39 2-section and 0.39 3-section */
} else if (upack_version == UPACK_11_12) {
cli_dbgmsg("Upack v 1.1/1.2\n");
loc_esi = dest + 0x148; /* always constant? */
loc_edi = dest + cli_readint32(loc_esi) - base; /* read checked above */
loc_esi += 4;
save_edi = loc_edi;
/* movsd */
paddr = dest + ((uint32_t)cli_readint32(loc_esi)) - base;
loc_esi += 4;
loc_edi += 4;
loc_ebx = loc_edi;
if (!CLI_ISCONTAINED(dest, dsize, loc_edi, ((6+count)*4)))
return -1;
cli_writeint32(loc_edi, 0xffffffff);
loc_edi += 4;
cli_writeint32(loc_edi, 0);
loc_edi += 4;
for (j=0; j<4; j++, loc_edi+=4)
cli_writeint32(loc_edi, (1));
for (j=0; j<count; j++, loc_edi+=4)
cli_writeint32(loc_edi, 0x400);
loc_edi = dest + cli_readint32(loc_esi) - base; /* read checked above */
pushed_esi = loc_edi;
loc_esi += 4;
loc_ecx = 0;
loc_esi += 4;
end_edi = dest + cli_readint32(loc_esi-0x28) - base; /* read checked above */
loc_esi = save_edi;
}
cli_dbgmsg("Upack: data initialized, before upack lzma call!\n");
if ((ret = (uint32_t)unupack399(dest, dsize, loc_ecx, loc_ebx, loc_ecx, loc_edi, end_edi, shlsize, paddr)) == 0xffffffff)
return -1;
if (upack_version == UPACK_399)
save3 = cli_readint32(loc_esi + 0x40);
else if (upack_version == UPACK_11_12)
save3 = cli_readint32(dest + vma + ep + 0x174);
}
/* let's fix calls */
loc_ecx = 0;
if (!CLI_ISCONTAINED(dest, dsize, alvalue, 1)) {
cli_dbgmsg("Upack: alvalue out of bounds\n");
return -1;
}
searchval = *alvalue&0xff;
cli_dbgmsg("Upack: loops: %08x search value: %02x\n", save3, searchval);
while(save3) {
if (!CLI_ISCONTAINED(dest, dsize, pushed_esi + loc_ecx, 1))
{
cli_dbgmsg("Upack: callfixerr %p %08x = %p, %p\n", dest, dsize, dest+dsize, pushed_esi+loc_ecx);
return -1;
}
if (pushed_esi[loc_ecx] == '\xe8' || pushed_esi[loc_ecx] == '\xe9')
{
char *adr = (pushed_esi + loc_ecx + 1);
loc_ecx++;
if (!CLI_ISCONTAINED(dest, dsize, adr, 4))
{
cli_dbgmsg("Upack: callfixerr\n");
return -1;
}
if ((cli_readint32(adr)&0xff) != searchval)
continue;
cli_writeint32(adr, EC32(CE32((uint32_t)(cli_readint32(adr)&0xffffff00)))-loc_ecx-4);
loc_ecx += 4;
save3--;
} else
loc_ecx++;
}
section.raw = 0;
section.rva = va;
section.rsz = end_edi-loc_edi;
section.vsz = end_edi-loc_edi;
if (!cli_rebuildpe(dest + (upack?0:va), &section, 1, base, original_ep, 0, 0, file)) {
cli_dbgmsg("Upack: Rebuilding failed\n");
return 0;
}
return 1;
}
int unupack399(char *bs, uint32_t bl, uint32_t init_eax, char *init_ebx, uint32_t init_ecx, char *init_edi, char *end_edi, uint32_t shlsize, char *paddr)
{
struct lzmastate p;
uint32_t loc_eax, ret, loc_al, loc_ecx = init_ecx, loc_ebp, eax_copy = init_eax, temp, i, jakas_kopia;
uint32_t state[6], temp_ebp;
char *loc_edx, *loc_ebx = init_ebx, *loc_edi = init_edi, *loc_ebp8, *edi_copy;
p.p0 = paddr;
p.p1 = cli_readint32(init_ebx);
p.p2 = cli_readint32(init_ebx + 4);
cli_dbgmsg("\n\tp0: %p\n\tp1: %08x\n\tp2: %08x\n", p.p0, p.p1, p.p2);
for (i = 0; i<6; i++) {
state[i] = cli_readint32(loc_ebx + (i<<2));
cli_dbgmsg("state[%d] = %08x\n", i, state[i]);
}
do {
loc_eax = eax_copy;
loc_edx = loc_ebx + (loc_eax<<2) + 0x58;
if ((ret = lzma_upack_esi_00(&p, loc_edx, bs, bl)))
{
/* loc_483927 */
loc_al = loc_eax&0xff;
loc_al = ((loc_al + 0xf9) > 0xff)?(3+8):8;
loc_eax = (loc_eax&0xffffff00)|(loc_al&0xff);
loc_ebp = state[2];
loc_ecx = (loc_ecx&0xffffff00)|0x30;
loc_edx += loc_ecx;
/* *(uint32_t *)(loc_ebx + 14) = loc_ebp; ???? */
if (!(ret = lzma_upack_esi_00(&p, loc_edx, bs, bl))) {
/* loc_48397c */
loc_eax--;
/*
temp_ebp = loc_ebp; loc_ebp = cli_readint32(loc_ebx+0x0c); cli_writeint32(loc_ebx+0x0c, temp_ebp);
temp_ebp = loc_ebp; loc_ebp = cli_readint32(loc_ebx+0x10); cli_writeint32(loc_ebx+0x10, temp_ebp);
*/
temp_ebp = loc_ebp;
loc_ebp = state[4];
state[4] = state[3];
state[3] = temp_ebp;
eax_copy = loc_eax;
loc_edx = loc_ebx + 0xbc0;
state[5] = loc_ebp;
if (lzma_upack_esi_54(&p, loc_eax, &loc_ecx, &loc_edx, &temp, bs, bl) == 0xffffffff)
return -1;
loc_ecx = 3;
jakas_kopia = temp;
loc_eax = temp-1;
if (loc_eax >= loc_ecx)
loc_eax = loc_ecx;
loc_ecx = 0x40;
loc_eax <<= 6; /* ecx=0x40, mul cl */
loc_ebp8 = loc_ebx + ((loc_eax<<2) + 0x378);
if (lzma_upack_esi_50(&p, 1, loc_ecx, &loc_edx, loc_ebp8, &loc_eax, bs, bl) == 0xffffffff)
return -1;
loc_ebp = loc_eax;
if ((loc_eax&0xff) >= 4)
{
/* loc_4839af */
loc_ebp = 2 + (loc_eax&1);
loc_eax >>= 1;
loc_eax--;
temp_ebp = loc_eax; loc_eax = loc_ecx; loc_ecx = temp_ebp;
loc_ebp <<= (loc_ecx&0xff);
loc_edx = loc_ebx + (loc_ebp<<2) + 0x178;
if ((loc_ecx&0xff) > 5)
{
/* loc_4839c6 */
loc_ecx = (loc_ecx&0xffffff00)|(((loc_ecx&0xff)-4)&0xff);
loc_eax = 0;
do {
uint32_t temp_edx;
/* compare with lzma_upack_esi_00 */
/* do not put in one statment because of difference in signedness */
if (!CLI_ISCONTAINED(bs, bl, p.p0, 4))
return -1;
temp_edx = cli_readint32((char *)p.p0);
temp_edx = EC32(CE32(temp_edx));
p.p1 >>= 1;
temp_edx -= p.p2;
loc_eax <<= 1;
if (temp_edx >= p.p1)
{
temp_edx = p.p1;
loc_eax++;
p.p2 += temp_edx;
}
if(((p.p1)&0xff000000) == 0)
{
p.p2 <<= 8;
p.p1 <<= 8;
p.p0++;
}
} while (--loc_ecx);
/* loc_4839e8 */
loc_ecx = (loc_ecx&0xffffff00)|4;
loc_eax <<= 4;
loc_ebp += loc_eax;
loc_edx = loc_ebx + 0x18;
}
/* loc4839f1 */
loc_eax = 1;
loc_eax <<= (loc_ecx&0xff);
loc_ebp8 = loc_edx;
temp_ebp = loc_ecx; loc_ecx = loc_eax; loc_eax = temp_ebp;
if (lzma_upack_esi_50(&p, 1, loc_ecx, &loc_edx, loc_ebp8, &loc_eax, bs, bl) == 0xffffffff)
return -1;
/* cdq, loc_edx = (loc_eax&0x80000000)?0xffffffff:0; */
loc_ecx = temp_ebp;
temp_ebp = CLI_SRS((int32_t)loc_eax, 31); /* thx, desp */
/* loc_483a00 */
do {
temp_ebp += temp_ebp;
temp_ebp += (loc_eax&1);
loc_eax >>= 1;
} while (--loc_ecx);
loc_ebp += temp_ebp;
/* loc_483a06 */
}
/* loc_483a09 */
loc_ebp++;
loc_ecx = jakas_kopia;
} else {
/* loc_48393a */
loc_edx += loc_ecx;
if ((ret = lzma_upack_esi_00(&p, loc_edx, bs, bl))) {
/* loc_483954 */
loc_edx += 0x60;
if ((ret = lzma_upack_esi_00(&p, loc_edx, bs, bl))) {
/* loc_48395e */
loc_edx += loc_ecx;
ret = lzma_upack_esi_00(&p, loc_edx, bs, bl);
temp_ebp = loc_ebp;
loc_ebp = state[4];
state[4] = state[3];
state[3] = temp_ebp;
if (ret)
{
temp_ebp = loc_ebp; loc_ebp = state[5]; state[5] = temp_ebp;
}
} else {
temp_ebp = loc_ebp; loc_ebp = state[3]; state[3] = temp_ebp;
}
} else {
/* loc_483940 */
loc_edx += loc_ecx;
if ((ret = lzma_upack_esi_00(&p, loc_edx, bs, bl))) {
} else {
/* loc_483946 */
loc_eax |= 1;
eax_copy = loc_eax;
edi_copy = loc_edi;
edi_copy -= state[2];
loc_ecx = (loc_ecx&0xffffff00)|0x80;
if (!CLI_ISCONTAINED(bs, bl, edi_copy, 1) || !CLI_ISCONTAINED(bs, bl, loc_edi, 1))
return -1;
loc_al = (*(uint8_t *)edi_copy)&0xff;
/* loc_483922 */
/* ok jmp to 483a19 */
/* loc_483a19 */
*loc_edi++ = loc_al;
continue;
}
}
/* loc_48396a */
eax_copy = loc_eax;
loc_edx = loc_ebx + 0x778;
if (lzma_upack_esi_54(&p, loc_eax, &loc_ecx, &loc_edx, &temp, bs, bl) == 0xffffffff)
return -1;
loc_eax = loc_ecx;
loc_ecx = temp;
}
/* loc_483a0b */
if (!CLI_ISCONTAINED(bs, bl, loc_edi, loc_ecx) || !CLI_ISCONTAINED(bs, bl, loc_edi-loc_ebp, loc_ecx+1))
return -1;
state[2] = loc_ebp;
for (i=0; i<loc_ecx; i++, loc_edi++)
*loc_edi = *(loc_edi - loc_ebp);
loc_eax = (loc_eax&0xffffff00)|*(uint8_t *)(loc_edi - loc_ebp);
loc_ecx = 0x80;
} else {
/* loc_4838d8 */
do {
if ( (loc_al = (loc_eax&0xff)) + 0xfd > 0xff)
loc_al -= 3; /* 0x100 - 0xfd = 3 */
else
loc_al = 0;
loc_eax = (loc_eax&0xffffff00)|loc_al;
} while (loc_al >= 7);
/* loc_4838e2 */
eax_copy = loc_eax;
if (loc_edi > init_edi && loc_edi < bl+bs)
{
loc_ebp = (*(uint8_t *)(loc_edi - 1)) >> shlsize;
} else {
loc_ebp = 0;
}
loc_ebp *= (int)0x300; /* XXX */
loc_ebp8 = loc_ebx + ((loc_ebp<<2) + 0x1008);
/* XXX save edi */
edi_copy = loc_edi;
loc_eax = (loc_eax&0xffffff00)|1;
if (loc_ecx) {
uint8_t loc_cl = loc_ecx&0xff;
loc_edi -= state[2];
if (!CLI_ISCONTAINED(bs, bl, loc_edi, 1))
return -1;
do {
loc_eax = (loc_eax&0xffff00ff)|((*loc_edi & loc_cl)?0x200:0x100);
loc_edx = loc_ebp8 + (loc_eax<<2);
ret = lzma_upack_esi_00(&p, loc_edx, bs, bl);
loc_al = loc_eax&0xff;
loc_al += loc_al;
loc_al += ret;
loc_al &= 0xff;
loc_eax = (loc_eax&0xffffff00)|loc_al;
loc_cl >>= 1;
if (loc_cl) {
uint8_t loc_ah = (loc_eax>>8)&0xff;
loc_ah -= loc_al;
loc_ah &= 1;
if (!loc_ah)
{
loc_eax = (loc_eax&0xffff0000)|(loc_ah<<8)|loc_al;
/* loc_483918, loc_48391a */
if (lzma_upack_esi_50(&p, loc_eax, 0x100, &loc_edx, loc_ebp8, &loc_eax, bs, bl) == 0xffffffff)
return -1;
break;
}
} else
break;
} while(1);
} else {
/* loc_48391a */
loc_ecx = (loc_ecx&0xffff00ff)|0x100;
if (lzma_upack_esi_50(&p, loc_eax, loc_ecx, &loc_edx, loc_ebp8, &loc_eax, bs, bl) == 0xffffffff)
return -1;
}
/* loc_48391f */
loc_ecx = 0;
loc_edi = edi_copy;
}
/* loc_483a19 */
/* 2GiM: i think this one is not properly checked, 2aCaB: true */
if (!CLI_ISCONTAINED(bs, bl, loc_edi, 1))
return -1;
*loc_edi++ = (loc_eax&0xff);
} while (loc_edi < end_edi);
return 1;
}