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exepacker.cpp
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exepacker.cpp
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// Written by Fabian "ryg" Giesen.
// I hereby place this code in the public domain.
#include "_types.hpp"
#include "_startconsole.hpp"
#include "exepacker.hpp"
#include "rangecoder.hpp"
#include "debuginfo.hpp"
#include "dis.hpp"
#include <stdio.h>
namespace rekkrunchy
{
#define NODEPACK2 0
/****************************************************************************/
extern "C" sU8 depacker[], depacker2[];
extern "C" sU32 depackerSize, depacker2Size;
/****************************************************************************/
struct PEHeader
{
sChar Magic[ 4 ];
sU16 CPU;
sU16 Sections;
sU8 _[ 12 ];
sU16 OptHeaderSize;
sU16 Flags;
sU8 __[ 4 ];
sU32 CodeSize;
sU32 DataSize;
sU32 BSSSize;
sU32 Entry;
sU32 CodeStart;
sU32 DataStart;
sU32 ImageStart;
sU32 ObjectAlign;
sU32 FileAlign;
sU8 ___[ 16 ];
sU32 ImageSize;
sU32 HeaderSize;
sU32 CheckSum;
sU16 SubSystem;
sU16 DllFlags;
sU8 ____[ 20 ];
sU32 DataDirs;
};
struct PESection
{
sChar Name[ 8 ];
sU32 VirtSize;
sU32 VirtAddr;
sU32 Size;
sU32 DataPtr;
sU8 _[ 12 ];
sU32 Flags;
};
struct RSRCDirEntry
{
sU32 NameID;
sU32 Offset;
};
struct RSRCDirectory
{
sU32 Flags;
sU8 _[ 8 ];
sU16 NameEntries;
sU16 IDEntries;
};
struct RSRCDataEntry
{
sU32 RVA;
sU32 Size;
sU32 Codepage;
sU32 Reserved;
};
/****************************************************************************/
KKBlobList::KKBlobList()
{
Blobs.Init();
}
KKBlobList::~KKBlobList()
{
Blobs.Exit();
}
void KKBlobList::AddBlob( void *data, sU32 size )
{
KKBlob *blob;
blob = Blobs.Add();
blob->Data = data;
blob->Size = size;
}
/****************************************************************************/
CodeFragment::CodeFragment()
{
Code = 0;
OriginalCode = 0;
CodeSize = 0;
}
CodeFragment::~CodeFragment()
{
delete[] OriginalCode;
OriginalCode = 0;
}
void CodeFragment::Init( sPtr code, sInt codeSize )
{
if ( OriginalCode )
delete[] OriginalCode;
OriginalCode = new sU8[ codeSize ];
Code = (sU8 *)code;
CodeSize = codeSize;
sCopyMem( OriginalCode, Code, CodeSize );
}
sBool CodeFragment::Patch( sChar *pattern, sU8 *patch, sInt size )
{
sInt i, pos, len;
len = sGetStringLen( pattern );
pos = -1;
for ( i = 0; i < CodeSize - len + 1; i++ )
{
if ( !sCmpMem( OriginalCode + i, pattern, len ) )
{
if ( pos == -1 )
pos = i;
else // not unique!
return sFALSE;
}
}
if ( pos != -1 )
{
sCopyMem( Code + pos, patch, size );
return sTRUE;
}
else
return sFALSE;
}
sBool CodeFragment::PatchDWord( sChar *pattern, sU32 patch )
{
return Patch( pattern, (sU8 *)&patch, sizeof( sU32 ) );
}
sBool CodeFragment::PatchJump( sChar *pattern, sU32 offset, sU32 base )
{
sInt i;
sU32 *pt;
sBool match;
match = sFALSE;
for ( i = 0; i < CodeSize - 3; i++ )
{
if ( !sCmpMem( OriginalCode + i, pattern, 4 ) )
{
if ( match )
return sFALSE;
match = sTRUE;
pt = (sU32 *)( Code + i );
*pt = offset - 4 - i - base;
}
}
return match;
}
sBool CodeFragment::PatchOffsets( sU32 base )
{
sInt i;
sU32 *pt;
for ( i = 0; i < CodeSize - 3; i++ )
{
pt = (sU32 *)( Code + i );
if ( OriginalCode[ i + 2 ] == 'P' && OriginalCode[ i + 3 ] == 'R' )
*pt = ( OriginalCode[ i + 0 ] + OriginalCode[ i + 1 ] * 256 ) + base;
}
return sTRUE;
}
/****************************************************************************/
sU32 EXEPacker::Align( sU32 size, sU32 align )
{
return size + ( align - 1 ) & -(sInt)align;
}
sPtr EXEPacker::AppendImage( sPtr data, sU32 size )
{
sCopyMem( OutImage + OutSize, data, size );
OutSize += size;
sVERIFY( OutSize < OutLimit );
return OutImage + OutSize - size;
}
sPtr EXEPacker::Padding( sU32 size )
{
sSetMem( OutImage + OutSize, 0, size );
OutSize += size;
sVERIFY( OutSize < OutLimit );
return OutImage + OutSize - size;
}
void EXEPacker::AlignmentPadding( sU32 align )
{
Padding( Align( OutSize, align ) - OutSize );
}
sU32 EXEPacker::SourceOffset( sU32 RVA )
{
sInt i;
sS64 relOffs;
for ( i = 0; i < PH->Sections; i++ )
{
relOffs = RVA - Section[ i ].VirtAddr;
if ( RVA >= Section[ i ].VirtAddr && relOffs < sMax( Section[ i ].VirtSize, Section[ i ].Size ) )
return Section[ i ].DataPtr + relOffs;
}
sVERIFYFALSE;
}
sU32 EXEPacker::SourceOffset2( sU32 RVA )
{
sInt i;
// sS64 relOffs;
for ( i = 0; i < PH->Sections; i++ )
{
int size = Section[ i ].VirtSize;
if ( size == 0 )
size = Section[ i ].Size;
if ( RVA >= Section[ i ].VirtAddr && RVA < Section[ i ].VirtAddr + size )
{
int delta = (int)( Section[ i ].VirtAddr - Section[ i ].DataPtr );
return RVA - delta;
}
/*
relOffs = RVA - Section[ i ].VirtAddr;
if ( RVA >= Section[ i ].VirtAddr && relOffs < sMax( Section[ i ].VirtSize, Section[ i ].Size ) )
return Section[ i ].DataPtr + relOffs;
*/
}
sVERIFYFALSE;
}
void EXEPacker::ResizeImports()
{
sU8 *ni;
if ( ImportSize + 512 >= ImportMax )
{
sVERIFY( ImportSize < ImportMax );
ni = new sU8[ ImportMax *= 2 ];
sCopyMem( ni, Imports, ImportSize );
delete[] Imports;
Imports = ni;
}
}
sBool EXEPacker::ProcessImports()
{
sU32 i, j;
sU32 *src, *imp, *iat;
sU8 *str;
ImportSize = 0;
ImportMax = 1024;
Imports = new sU8[ ImportMax ];
Imports[ ImportSize++ ] = 0; // depacker skips first byte
if ( DataDir[ 3 ] )
{
src = (sU32 *)( Source + SourceOffset( DataDir[ 2 ] ) );
for ( i = 0; src[ i * 5 + 4 ]; i++ )
{
ResizeImports();
// copy iat offset
*(sU32 *)( Imports + ImportSize ) = src[ i * 5 + 4 ] + PH->ImageStart; ImportSize += 4;
// copy dll name
str = Source + SourceOffset( src[ i * 5 + 3 ] );
while ( *str )
{
Imports[ ImportSize++ ] = *str;
*str++ = 0;
}
Imports[ ImportSize++ ] = 0;
// dll imports
iat = (sU32 *)( Source + SourceOffset( src[ i * 5 + 4 ] ) );
if ( src[ i * 5 + 0 ] )
imp = (sU32 *)( Source + SourceOffset( src[ i * 5 + 0 ] ) );
else
imp = iat;
for ( j = 0; imp[ j ]; j++ )
{
ResizeImports();
if ( imp[ j ] & 0x80000000 )
{
if ( ( imp[ j ] & 0x7fffffff ) > 0xffff )
{
sSPrintF( Error, 512, "invalid import ordinal" );
return sFALSE;
}
Imports[ ImportSize++ ] = 0xff;
Imports[ ImportSize++ ] = imp[ j ] & 0xff;
Imports[ ImportSize++ ] = ( imp[ j ] >> 8 ) & 0xff;
Imports[ ImportSize++ ] = 0;
}
else
{
str = Source + SourceOffset( imp[ j ] );
*str++ = 0; // overwrite hint with zero
*str++ = 0;
while ( *str )
{
if ( *str >= 128 )
{
sSPrintF( Error, 512, "non-ascii character in imported name" );
return sFALSE;
}
Imports[ ImportSize++ ] = *str;
*str++ = 0;
}
Imports[ ImportSize++ ] = 0;
}
imp[ j ] = iat[ j ] = 0;
}
Imports[ ImportSize++ ] = 0;
}
}
*(sU32 *)( Imports + ImportSize ) = 0; ImportSize += 4;
return sTRUE;
}
void EXEPacker::CleanupUnImage()
{
sU32 i, *pt;
// clear debug info
if ( DataDir[ 13 ] )
{
for ( i = 0; i < DataDir[ 13 ]; i += 28 )
{
pt = (sU32 *)( UnImageVA + DataDir[ 12 ] + i );
sSetMem( UnImageVA + pt[ 5 ], 0, pt[ 4 ] );
}
}
// zero out all data referred to in the data directory, except resources
for ( i = 0; i < PH->DataDirs; i++ )
{
if ( i != 2 && DataDir[ i * 2 + 1 ] )
sSetMem( UnImageVA + DataDir[ i * 2 + 0 ], 0, DataDir[ i * 2 + 1 ] );
}
}
sBool EXEPacker::ProcessResources()
{
if ( ResourcesPresent )
{
// this should *always* be 0
sU32 offs = ProcessResourcesR( Source + SourceOffset( DataDir[ 4 ] ), 0, 0, sTRUE );
return offs == 0;
}
else
return sTRUE;
}
sU32 EXEPacker::ProcessResourcesR( sU8 *start, sU32 offs, sInt level, sBool compress )
{
RSRCDirectory *dir;
RSRCDataEntry *data;
RSRCDirEntry *entry, *targetEntry;
sU16 *str;
sU32 destOffs, dataOffs, size;
sInt i;
sBool compFlag;
// this function is called only for resource directories.
dir = (RSRCDirectory *)( start + offs );
// first, copy this resource directory into the output buffer
destOffs = Resources.Count;
size = sizeof( RSRCDirectory ) + ( dir->IDEntries + dir->NameEntries ) * sizeof( RSRCDirEntry );
Resources.AtLeast( destOffs + size );
sCopyMem( &Resources[ destOffs ], dir, size );
Resources.Count += size;
// clear resource directory in unpacked image
sSetMem( UnImageVA + DataDir[ 4 ] + offs, 0, size );
// then process each child node in turn
entry = (RSRCDirEntry *)( start + offs + sizeof( RSRCDirectory ) );
for ( i = 0; i < dir->NameEntries + dir->IDEntries; i++, entry++ )
{
// decide whether to compress child nodes or not
compFlag = compress;
if ( level == 0 ) // type level
{
// compress everything but icons and manifests
if ( entry->NameID == 3 || entry->NameID == 14 || entry->NameID == 24 )
{
if ( entry->NameID == 24 ) // utter warning for manifests
{
sSPrintF( InfoPtr, 512, "Manifest present and stored uncompressed." );
InfoPtr += sGetStringLen( InfoPtr ) + 1;
}
compFlag = sFALSE;
}
}
// process names
if ( entry->NameID & 0x80000000 ) // is name
{
// copy string
dataOffs = ResourceStrings.Count;
str = (sU16 *)( start + ( entry->NameID & 0x7fffffff ) );
size = ( *str + 1 ) * 2;
ResourceStrings.AtLeast( dataOffs + size );
ResourceStrings.Count += size;
sCopyMem( &ResourceStrings[ dataOffs ], str, size );
// clear string in unpacked image
sSetMem( UnImageVA + DataDir[ 4 ] + ( entry->NameID & 0x7fffffff ), 0, size );
// patch new offset into resource structure
// (relative to strings, we adjust all this in a second pass)
targetEntry = (RSRCDirEntry *)&Resources[ destOffs + sizeof( RSRCDirectory ) ];
targetEntry[ i ].NameID = dataOffs | 0x80000000;
}
if ( entry->Offset & 0x80000000 ) // subdirectory
{
dataOffs = ProcessResourcesR( start, entry->Offset & 0x7fffffff, level + 1, compFlag );
// patch new offset into copied resource structure
targetEntry = (RSRCDirEntry *)&Resources[ destOffs + sizeof( RSRCDirectory ) ];
targetEntry[ i ].Offset = dataOffs | 0x80000000;
}
else // child is a leaf
{
// copy the data entry, then get a pointer to it
dataOffs = Resources.Count;
Resources.AtLeast( dataOffs + sizeof( RSRCDataEntry ) );
sCopyMem( &Resources[ dataOffs ], start + entry->Offset, sizeof( RSRCDataEntry ) );
Resources.Count += sizeof( RSRCDataEntry );
data = (RSRCDataEntry *)&Resources[ dataOffs ];
// adjust entry position
targetEntry = (RSRCDirEntry *)&Resources[ destOffs + sizeof( RSRCDirectory ) ];
targetEntry[ i ].Offset = dataOffs;
if ( compress ) // this will be compressed, so leave it where it is
{
// but all relative addresses will change, so make the address
// absolute, then we can fix it later
data->RVA += PH->ImageStart;
data->Reserved = 1; // we use that field for our own sinister purposes here
}
else // this won't be compressed, move it to the unpacked data range
{
dataOffs = ResourceData.Count;
// copy actual data
ResourceData.AtLeast( dataOffs + ( ( data->Size + 3 ) & ~3 ) );
ResourceData.Count += ( data->Size + 3 ) & ~3;
sCopyMem( &ResourceData[ dataOffs ], Source + SourceOffset( data->RVA ), data->Size );
// clear data in unpacked image
sSetMem( UnImageVA + data->RVA, 0, data->Size );
// update structures
data->RVA = dataOffs; // relative to beginning of resource data here
data->Reserved = 0;
}
}
}
return destOffs;
}
void EXEPacker::FinishResources( sU32 *dataDir )
{
sU32 size, stringpos, datarva;
sU8 *resdata;
if ( ResourcesPresent )
{
// calc size
size = ( Resources.Count + 3 ) & ~3;
stringpos = size;
size += ( ResourceStrings.Count + 3 ) & ~3;
size += ( ResourceData.Count + 3 ) & ~3;
// append data in turn and update data directory
AlignmentPadding( 4 );
dataDir[ 4 ] = OutSize;
dataDir[ 5 ] = size;
resdata = (sU8 *)AppendImage( &Resources[ 0 ], Resources.Count );
AlignmentPadding( 4 );
AppendImage( &ResourceStrings[ 0 ], ResourceStrings.Count );
AlignmentPadding( 4 );
datarva = OutSize;
AppendImage( &ResourceData[ 0 ], ResourceData.Count );
AlignmentPadding( 4 );
// then adjust addresses
AdjustResourcesR( resdata, 0, stringpos, datarva );
}
}
void EXEPacker::AdjustResourcesR( sU8 *start, sU32 offs, sU32 stringrel, sU32 datarel )
{
RSRCDirectory *dir;
RSRCDirEntry *entry;
RSRCDataEntry *data;
sInt i;
// iterate through the entries...
dir = (RSRCDirectory *)( start + offs );
entry = (RSRCDirEntry *)( start + offs + sizeof( RSRCDirectory ) );
for ( i = 0; i < dir->NameEntries + dir->IDEntries; i++, entry++ )
{
if ( entry->NameID & 0x80000000 ) // it's a name, adjust to point to strings
entry->NameID += stringrel;
if ( entry->Offset & 0x80000000 ) // it's a subdirectory, recurse
AdjustResourcesR( start, entry->Offset & 0x7fffffff, stringrel, datarel );
else // leaf
{
data = (RSRCDataEntry *)( start + entry->Offset );
if ( data->Reserved )
{
data->RVA -= OPH->ImageStart; // make address RVA again
data->Reserved = 0;
}
else
data->RVA += datarel;
}
}
}
/****************************************************************************/
// The VC8 runtime library startup code is slightly modified; instead of
// calling GetModuleHandle(0) like it used to be, it now hardcodes the
// ImageBase address. Which means we have a lot of fun work to do to
// support VC8 programs properly. Great.
sU32 EXEPacker::GetVC8RuntimePatchOffset()
{
// default patch address: image base of the old process. "it's safe".
sU32 patchOffs = PH->ImageStart;
// try to find out whether the program seems to be using the VC8 runtime.
// this is kinda involved. (OF COURSE... argh!)
// entry point:
// call ___security_init_cookie
// jmp ___tmainCRTStartup
const sU8 *entry = Source + SourceOffset( PH->Entry );
if ( entry[ 0 ] == 0xe8 && entry[ 5 ] == 0xe9 )
{
sU32 startOffs = PH->Entry + 10 + *( (sU32 *)( entry + 6 ) );
const sU8 *st = Source + SourceOffset( startOffs );
// startup code (first few bytes)
// push 58h
// push offset __sehtable$___tmainCRTStartup
// call __SEH_prolog4
// xor ebx,ebx
// mov dword ptr [ebp-1ch],ebx
// mov dword ptr [ebp-4],ebx
// lea eax,[ebp-68h]
// push eax
if ( st[ 0 ] == 0x6a && st[ 1 ] == 0x58 && st[ 2 ] == 0x68 && st[ 7 ] == 0xe8
&& st[ 12 ] == 0x33 && st[ 13 ] == 0xdb
&& st[ 14 ] == 0x89 && st[ 15 ] == 0x5d && st[ 16 ] == 0xe4
&& st[ 17 ] == 0x89 && st[ 18 ] == 0x5d && st[ 19 ] == 0xfc
&& st[ 20 ] == 0x8d && st[ 21 ] == 0x45 && st[ 22 ] == 0x98
&& st[ 23 ] == 0x50 )
{
// okay, this is starting to look likely.
// ...0x129:
// movzx eax, word ptr [ebp-38h]
// jmp short 132h
// push 0ah
// pop eax
// push eax
// push esi
// push 0
// push offset ___ImageBase
// call _WinMain@16
if ( st[ 0x129 ] == 0x0f && st[ 0x12a ] == 0xb7 && st[ 0x12b ] == 0x45 && st[ 0x12c ] == 0xc8
&& st[ 0x12d ] == 0xeb && st[ 0x12e ] == 0x03
&& st[ 0x12f ] == 0x6a && st[ 0x130 ] == 0x0a
&& st[ 0x131 ] == 0x58 && st[ 0x132 ] == 0x50 && st[ 0x133 ] == 0x56
&& st[ 0x134 ] == 0x6a && st[ 0x135 ] == 0x00
&& st[ 0x136 ] == 0x68
&& st[ 0x13b ] == 0xe8 )
{
sSPrintF( InfoPtr, 512, "VC8 startup code detected and patched." );
InfoPtr += sGetStringLen( InfoPtr ) + 1;
patchOffs = PH->ImageStart + startOffs + 0x137;
}
}
}
return patchOffs;
}
/****************************************************************************/
sU8 *EXEPacker::Pack( sU8 *source, sU32 srcSize, sInt &outSize, DebugInfo *info, PackerCallback cb, KKBlobList *blobs )
{
PESection *outSection;
sU32 *outDir, imageEnd, dataStart, dataSize, *p, iltOffs, depSize, skip;
sU32 depack2Base;
sU8 *buffer;
sInt i, j, inSize, ptrTableO;
DisFilter filter;
CodeFragment depack2;
ReorderBuffer reorder;
double* srcPackData = new double[ srcSize ];
memset( srcPackData, 0, srcSize * sizeof( double ) );
Error[ 0 ] = Warnings[ 0 ] = Info[ 0 ] = 0;
ActualSize = 0;
Source = source;
WarningsPtr = Warnings;
InfoPtr = Info;
Resources.Init();
ResourceStrings.Init();
ResourceData.Init();
// verify the file is actually a packable executable
if ( sCmpMem( source, "MZ", 2 ) )
{
sSPrintF( Error, sizeof( Error ), "file is not executable" );
return 0;
}
PH = (PEHeader *)( source + *(sU32 *)( source + 0x3c ) );
if ( sCmpMem( PH->Magic, "PE\x00\x00", 4 ) )
{
sSPrintF( Error, sizeof( Error ), "file is not a portable executable" );
return 0;
}
// setup some useful pointers
DataDir = (sU32 *)&PH[ 1 ];
Section = (PESection *)( DataDir + PH->DataDirs * 2 );
// perform additional checks to reject files with features we don't support
if ( DataDir[ 1 ] || PH->DataDirs >= 10 && DataDir[ 19 ] )
{
sSPrintF( Error, sizeof( Error ), "files with exports or tls data are not supported" );
return 0;
}
// allocate output image
inSize = PH->HeaderSize;
for ( i = 0; i < PH->Sections; i++ )
inSize += Align( Section[ i ].Size, PH->FileAlign );
if ( blobs )
{
for ( i = 0; i < blobs->Blobs.Count; i++ )
{
inSize = ( inSize + 15 ) & ~15;
inSize += blobs->Blobs[ i ].Size;
}
}
OutLimit = inSize + ( inSize / 8 ) + 4096 + 512;
OutImage = new sU8[ OutLimit + 512 ];
OutSize = 0;
// rebase debug info
if ( info )
info->Rebase( PH->ImageStart );
// check for resources
ResourcesPresent = DataDir[ 5 ] != 0;
// build the image: headers
AppendImage( "MZ", 2 ); // dos stub
//AppendImage("conspiracy", 10); // dos stub
//AppendImage("conspiracyconspiracyconspiracyconspiracyconspiracyconspiracy", 58); // vanity header
//AppendImage("__ ___ ___ 6| _|| ||_ -|4|___||_|_||___|k[Conspiracy]", 58); // vanity header
/*
AppendImage( "--.,---.,---.6"
"| | |`---.4"
"`---'` '`---'k"
"[Conspiracy]", 58 ); // vanity header
*/
unsigned char vanity[ 58 ] = { 0xDE, 0xDB, 0xDB, 0xDC, 0x20, 0xDB, 0xDD, 0xDE,
0xDB, 0x20, 0xDC, 0xDB, 0xDB, 0xDD, 0x20, 0xDB,
0xDD, 0x20, 0xDB, 0xDD, 0xDE, 0xDB, 0xDD, 0xDB,
0xDD, 0xDE, 0xDB, 0xDC, 0x20, 0x20, 0xDE, 0xDB,
0x20, 0xDC, 0xDC, 0x20, 0xDB, 0xDD, 0xDB, 0xDB,
0x20, 0x20, 0x20, 0xDB, 0xDB, 0x20, 0x20, 0xDF,
0xDB, 0xDB, 0xDF, 0xDE, 0xDB, 0x20, 0xDB, 0xDD,
0xDE, 0xDB };
AppendImage( vanity
/*"▐██▄ █▌▐█ ▄██▌ █▌ █▌▐█▌█▌▐█▄ ▐█ ▄▄ █▌██ ██ ▀██▀▐█ █▌▐█"*/, 58 ); // vanity header
int pos = 0x40;
AppendImage( &pos, 4 );
OPH = (PEHeader *)AppendImage( PH, sizeof( PEHeader ) );
OPH->FileAlign = 512; // more is a waste of space
//OPH->DataStart = 12; // position of pe header
OPH->DataDirs = ResourcesPresent ? 16 : 5;
OPH->Sections = 1;
OPH->OptHeaderSize = sizeof( PEHeader ) - 24 + OPH->DataDirs * 8;
if ( OPH->CheckSum != 0 )
{
OPH->CheckSum = 0;
sSPrintF( InfoPtr, 512, "Checksum present, clearing." );
InfoPtr += sGetStringLen( InfoPtr ) + 1;
}
outDir = (sU32 *)AppendImage( DataDir, OPH->DataDirs * 8 );
outSection = (PESection *)AppendImage( Section, sizeof( PESection ) );
OPH->HeaderSize = Section[ 0 ].VirtAddr;
imageEnd = Section[ PH->Sections - 1 ].VirtAddr + Section[ PH->Sections - 1 ].VirtSize;
// account for blobs
if ( blobs )
{
for ( i = 0; i < blobs->Blobs.Count; i++ )
{
imageEnd = ( imageEnd + 15 ) & ~15;
imageEnd += blobs->Blobs[ i ].Size;
}
ptrTableO = -1;
for ( i = 0; i < PH->Sections; i++ )
{
buffer = Source + SourceOffset( Section[ i ].VirtAddr );
for ( j = 0; j < (sInt)( Section[ i ].Size - 8 ); j++ )
{
if ( !sCmpMem( buffer + j, "PTRTABLE", 8 ) )
{
if ( ptrTableO != -1 )
{
sSPrintF( Error, sizeof( Error ), "multiple candidate PTRTABLEs in file" );
delete[] OutImage;
return 0;
}
else
ptrTableO = j + Section[ i ].VirtAddr;
}
}
}
if ( ptrTableO == -1 )
{
sSPrintF( Error, sizeof( Error ), "blobs specified but no PTRTABLE present" );
delete[] OutImage;
return 0;
}
}
dataSize = Align( imageEnd - Section[ 0 ].VirtAddr, PH->FileAlign );
// process import records
if ( !ProcessImports() )
{
delete[] OutImage;
return 0;
}
dataSize += 4 + ImportSize; // 4=import size tag
// build source image for code preprocess
sU8 *sourceImg = new sU8[ dataSize ];
sSetMem( sourceImg, 0, dataSize );
sU32 codeSize = PH->CodeSize;
for ( sInt i = 0; i < PH->Sections; i++ )
{
if ( Section[ i ].Size )
sCopyMem( sourceImg + Section[ i ].VirtAddr - Section[ 0 ].VirtAddr, Source + Section[ i ].DataPtr, sMin( Section[ i ].Size, Section[ i ].VirtSize ) );
}
// broken purebasic executable fix
if ( PH->Sections >= 2
&& !sCmpMem( Section[ 0 ].Name, ".code\0", 6 )
&& !sCmpMem( Section[ 1 ].Name, ".text\0", 6 ) )
{
sSPrintF( WarningsPtr, 512, "This looks like a broken PureBasic executable - adjusting CodeSize." );
WarningsPtr += sGetStringLen( WarningsPtr ) + 1;
codeSize = codeSize - Section[ 0 ].Size + ( Section[ 1 ].VirtAddr - Section[ 0 ].VirtAddr );
}
// filter code section and clear original code section
sU8 *codePtr = sourceImg + PH->CodeStart - Section[ 0 ].VirtAddr;
while ( codeSize && !codePtr[ codeSize - 1 ] )
codeSize--;
filter.Filter( codePtr, codeSize, PH->ImageStart + PH->CodeStart, info );
dataSize += depacker2Size + filter.Output.Size;
int oldAddr = PH->ImageStart + PH->CodeStart;
int newAddr = PH->ImageStart + Section[ 0 ].VirtAddr - filter.Output.Size;
// test unfilter (and build reorder buffer)
buffer = new sU8[ codeSize + 16 ];
DisUnFilter( filter.Output.Data, buffer, oldAddr, newAddr, reorder );
if ( sCmpMem( buffer, codePtr, codeSize ) )
{
delete[] buffer;
delete[] sourceImg;
delete[] OutImage;
sSPrintF( Error, 512, "(internal) unfilter failed" );
return 0;
}
delete[] buffer;
delete[] sourceImg;
// build the (uncompressed) image (data chunk only)
UnImage = new sU8[ dataSize + 8 ];
sSetMem( UnImage, 0, dataSize + 8 );
sS32* UnImageSource = new sS32[ dataSize ];
for ( sU32 x = 0; x < dataSize; x++ )
UnImageSource[ x ] = -2;
UnImage += 8;
#if !NODEPACK2
sCopyMem( UnImage, depacker2, depacker2Size );
depack2.Init( UnImage, depacker2Size );
#endif
*( (sU32 *)( UnImage + depacker2Size ) ) = ImportSize;
sCopyMem( UnImage + depacker2Size + 4, Imports, ImportSize );
ImportSize += 4;
delete[] Imports;
for ( sU32 x = 0; x < depacker2Size + ImportSize; x++ )
UnImageSource[ x ] = -1;
#if !NODEPACK2
for ( int x = 0; x < filter.Output.Size; x++ )
UnImageSource[ depacker2Size + ImportSize + x ] = ( (int*)filter.SourceDataOutput.Data )[ x ] < 0 ? -1 : ( (int*)filter.SourceDataOutput.Data )[ x ] + PH->CodeStart - Section[ 0 ].VirtAddr + Section[ 0 ].DataPtr;
sCopyMem( UnImage + depacker2Size + ImportSize, filter.Output.Data, filter.Output.Size );
#endif
UnImageVA = UnImage + depacker2Size + ImportSize + filter.Output.Size - Section[ 0 ].VirtAddr;
for ( i = 0; i < PH->Sections; i++ )
if ( Section[ i ].DataPtr )
{
sCopyMem( UnImageVA + Section[ i ].VirtAddr, source + Section[ i ].DataPtr, Section[ i ].Size );
for ( sU32 x = 0; x < Section[ i ].Size; x++ )
UnImageSource[ depacker2Size + ImportSize + filter.Output.Size - Section[ 0 ].VirtAddr + Section[ i ].VirtAddr + x ] = Section[ i ].DataPtr + x;
}
// process resources
ProcessResources();
// check for load configuration directory
if ( PH->DataDirs >= 11 && OPH->DataDirs >= 11 && outDir[ 21 ] )
{
sSetMem( UnImageVA + outDir[ 20 ], 0, outDir[ 21 ] );
outDir[ 20 ] = 0;
outDir[ 21 ] = 0;
sSPrintF( WarningsPtr, 512, "Load Configuration Directory cleared." );
WarningsPtr += sGetStringLen( WarningsPtr ) + 1;
}
// clean up
CleanupUnImage();
#if !NODEPACK2
sSetMem( UnImageVA + PH->CodeStart, 0, codeSize );
for ( sU32 x = 0; x < codeSize; x++ )
UnImageSource[ depacker2Size + ImportSize + filter.Output.Size - Section[ 0 ].VirtAddr + PH->CodeStart + x ] = -3;
#endif
// copy blobs (and write blob ptrs to ptrtable)
if ( blobs )
{
j = Section[ PH->Sections - 1 ].VirtAddr + Section[ PH->Sections - 1 ].VirtSize;
for ( i = 0; i < blobs->Blobs.Count; i++ )
{
j = ( j + 15 ) & ~15;
( (sU32 *)( UnImageVA + ptrTableO ) )[ i ] = j + PH->ImageStart;
sCopyMem( UnImageVA + j, blobs->Blobs[ i ].Data, blobs->Blobs[ i ].Size );
j += blobs->Blobs[ i ].Size;
}
}
// set up (stage2) depacker params
#if !NODEPACK2
depack2Base = PH->ImageStart + Section[ 0 ].VirtAddr - depacker2Size - ImportSize - filter.Output.Size;
depack2.PatchOffsets( depack2Base );
depack2.Patch( "DEPACKTABLE", filter.Table, sizeof( filter.Table ) );
depack2.PatchDWord( "DCOD", PH->ImageStart + PH->CodeStart );
depack2.PatchDWord( "KERN", depack2Base + depacker2Size - 23 - 52 + 5 );
depack2.PatchDWord( "MSGB", depack2Base + depacker2Size - 12 - 52 + 5 );
depack2.PatchDWord( "EDLL", depack2Base + depacker2Size - 32 );
depack2.PatchDWord( "ERRR", depack2Base + depacker2Size - 32 - 20 + 5 );
depack2.PatchJump( "ETRY", PH->ImageStart + PH->Entry, depack2Base );
#endif
skip = 0; // trailing zero size
while ( skip < dataSize && !UnImage[ dataSize - skip - 1 ] )
skip++;
// set symbol source offsets and reset symbol packed size
if ( info && info->Symbols.Array )
{
sU32 base = SourceOffset( info->Symbols[ 0 ].VA - PH->ImageStart * 2 );
for ( sS32 i = 0; i < info->Symbols.Count; i++ )
{
info->Symbols[ i ].sourcePos = info->ImageRvaToVa( info->Symbols[ i ].VA - PH->ImageStart * 2 );
info->Symbols[ i ].PackedSize = 0;
if ( !info->Symbols[ i ].sourcePos )
{
info->Symbols[ i ].Size = 0;
continue;
if ( i == 402 )
int z = 0;
if ( info->Symbols[ i ].FileNum >= 0 )
{
info->Symbols[ i ].sourcePos = SourceOffset2( info->Symbols[ i ].VA - PH->ImageStart * 2 ) /*- base*/; // compute offset relative to first symbol
info->Symbols[ i ].PackedSize = 0.0;
}
else
{
if ( i > 0 )
{
info->Symbols[ i ].sourcePos = SourceOffset2( info->Symbols[ i - 1 ].VA - PH->ImageStart * 2 ) /*- base*/ + info->Symbols[ i - 1 ].Size; // compute offset relative to first symbol
info->Symbols[ i ].PackedSize = 0.0;
}
}
}
}