pe: pack() logic moved to PeFile

This commit is contained in:
László Molnár
2014-03-02 22:34:52 +01:00
parent 18e55061e1
commit 632b2ae1ba
8 changed files with 885 additions and 33 deletions
+68
View File
@@ -237,9 +237,76 @@ void PackArmPe::buildLoader(const Filter *ft)
addLoader("IDENTSTR,UPX1HEAD", NULL);
}
bool PackArmPe::handleForceOption()
{
return (ih.cpu != 0x1c0 && ih.cpu != 0x1c2)
|| (ih.opthdrsize != 0xe0)
|| ((ih.flags & EXECUTABLE) == 0)
|| (ih.entry == 0 /*&& !isdll*/)
|| (ih.ddirsentries != 16)
// || IDSIZE(PEDIR_EXCEPTION) // is this used on arm?
// || IDSIZE(PEDIR_COPYRIGHT)
;
}
void PackArmPe::callCompressWithFilters(Filter &ft, int filter_strategy, unsigned ih_codebase)
{
// limit stack size needed for runtime decompression
upx_compress_config_t cconf; cconf.reset();
cconf.conf_lzma.max_num_probs = 1846 + (768 << 4); // ushort: ~28 KiB stack
compressWithFilters(&ft, 2048, &cconf, filter_strategy,
ih_codebase, rvamin, 0, NULL, 0);
}
void PackArmPe::addNewRelocations(Reloc &rel, unsigned upxsection)
{
static const char* symbols_to_relocate[] = {
"ONAM", "BIMP", "BREL", "FIBE", "FIBS", "ENTR", "DST0", "SRC0"
};
for (unsigned s2r = 0; s2r < TABLESIZE(symbols_to_relocate); s2r++)
{
unsigned off = linker->getSymbolOffset(symbols_to_relocate[s2r]);
if (off != 0xdeaddead)
rel.add(off + upxsection, 3);
}
}
unsigned PackArmPe::getProcessImportParam(unsigned upxsection)
{
return linker->getSymbolOffset("IATT") + upxsection;
}
void PackArmPe::defineSymbols(unsigned ncsection, unsigned, unsigned,
unsigned ic, Reloc &, unsigned s1addr)
{
const unsigned onam = ncsection + soxrelocs + ih.imagebase;
linker->defineSymbol("start_of_dll_names", onam);
linker->defineSymbol("start_of_imports", ih.imagebase + rvamin + cimports);
linker->defineSymbol("start_of_relocs", crelocs + rvamin + ih.imagebase);
linker->defineSymbol("filter_buffer_end", ih.imagebase + ih.codebase + ih.codesize);
linker->defineSymbol("filter_buffer_start", ih.imagebase + ih.codebase);
linker->defineSymbol("original_entry", ih.entry + ih.imagebase);
linker->defineSymbol("uncompressed_length", ph.u_len);
linker->defineSymbol("start_of_uncompressed", ih.imagebase + rvamin);
linker->defineSymbol("compressed_length", ph.c_len);
linker->defineSymbol("start_of_compressed", ih.imagebase + s1addr + ic);
defineDecompressorSymbols();
}
void PackArmPe::setOhDataBase(const pe_section_t *osection)
{
oh.database = osection[2].vaddr;
}
void PackArmPe::setOhHeaderSize(const pe_section_t *osection)
{
oh.headersize = osection[1].rawdataptr;
}
void PackArmPe::pack(OutputFile *fo)
{
super::pack0(fo, 1U << 9, 0x10000, true);
#if 0
// FIXME: we need to think about better support for --exact
if (opt->exact)
throwCantPackExact();
@@ -695,6 +762,7 @@ void PackArmPe::pack(OutputFile *fo)
// finally check the compression ratio
if (!checkFinalCompressionRatio(fo))
throwNotCompressible();
#endif
}
/*
+10
View File
@@ -47,6 +47,16 @@ public:
virtual const int *getCompressionMethods(int method, int level) const;
virtual const int *getFilters() const;
virtual bool handleForceOption();
virtual void callCompressWithFilters(Filter &, int filter_strategy,
unsigned ih_codebase);
virtual void defineSymbols(unsigned ncsection, unsigned upxsection,
unsigned sizeof_oh, unsigned isize_isplit,
Reloc &rel, unsigned s1addr);
virtual void addNewRelocations(Reloc &, unsigned upxsection);
virtual unsigned getProcessImportParam(unsigned upxsection);
virtual void setOhDataBase(const pe_section_t *osection);
virtual void setOhHeaderSize(const pe_section_t *osection);
virtual void pack(OutputFile *fo);
virtual bool canPack();
+115 -3
View File
@@ -37,9 +37,6 @@
static const
#include "stub/i386-win32.pe.h"
#define FILLVAL 0
/*************************************************************************
//
**************************************************************************/
@@ -251,9 +248,123 @@ void PackW32Pe::buildLoader(const Filter *ft)
}
bool PackW32Pe::handleForceOption()
{
return (ih.cpu < 0x14c || ih.cpu > 0x150)
|| (ih.opthdrsize != 0xe0)
|| ((ih.flags & EXECUTABLE) == 0)
|| ((ih.flags & BITS_32_MACHINE) == 0) //NEW: 32 bit machine flag must be set - Stefan Widmann
|| (ih.coffmagic != 0x10B) //COFF magic is 0x10B in PE files, 0x20B in PE32+ files - Stefan Widmann
|| (ih.entry == 0 && !isdll)
|| (ih.ddirsentries != 16)
|| IDSIZE(PEDIR_EXCEPTION) // is this used on i386?
// || IDSIZE(PEDIR_COPYRIGHT)
;
}
void PackW32Pe::defineSymbols(unsigned ncsection, unsigned upxsection,
unsigned sizeof_oh, unsigned ic,
Reloc &, unsigned s1addr)
{
const unsigned myimport = ncsection + soresources - rvamin;
// patch loader
linker->defineSymbol("original_entry", ih.entry);
if (use_dep_hack)
{
// This works around a "protection" introduced in MSVCRT80, which
// works like this:
// When the compiler detects that it would link in some code from its
// C runtime library which references some data in a read only
// section then it compiles in a runtime check whether that data is
// still in a read only section by looking at the pe header of the
// file. If this check fails the runtime does "interesting" things
// like not running the floating point initialization code - the result
// is a R6002 runtime error.
// These supposed to be read only addresses are covered by the sections
// UPX0 & UPX1 in the compressed files, so we have to patch the PE header
// in the memory. And the page on which the PE header is stored is read
// only so we must make it rw, fix the flags (i.e. clear
// PEFL_WRITE of osection[x].flags), and make it ro again.
// rva of the most significant byte of member "flags" in section "UPX0"
const unsigned swri = pe_offset + sizeof_oh + sizeof(pe_section_t) - 1;
// make sure we only touch the minimum number of pages
const unsigned addr = 0u - rvamin + swri;
linker->defineSymbol("swri", addr & 0xfff); // page offset
// check whether osection[0].flags and osection[1].flags
// are on the same page
linker->defineSymbol("vp_size", ((addr & 0xfff) + 0x28 >= 0x1000) ?
0x2000 : 0x1000); // 2 pages or 1 page
linker->defineSymbol("vp_base", addr &~ 0xfff); // page mask
linker->defineSymbol("VirtualProtect", myimport +
ilinkerGetAddress("kernel32.dll", "VirtualProtect"));
}
linker->defineSymbol("reloc_delt", 0u - (unsigned) ih.imagebase - rvamin);
linker->defineSymbol("start_of_relocs", crelocs);
linker->defineSymbol("ExitProcess", myimport +
ilinkerGetAddress("kernel32.dll", "ExitProcess"));
linker->defineSymbol("GetProcAddress", myimport +
ilinkerGetAddress("kernel32.dll", "GetProcAddress"));
linker->defineSymbol("kernel32_ordinals", myimport);
linker->defineSymbol("LoadLibraryA", myimport +
ilinkerGetAddress("kernel32.dll", "LoadLibraryA"));
linker->defineSymbol("start_of_imports", myimport);
linker->defineSymbol("compressed_imports", cimports);
defineDecompressorSymbols();
linker->defineSymbol("filter_buffer_start", ih.codebase - rvamin);
// in case of overlapping decompression, this hack is needed,
// because windoze zeroes the word pointed by tlsindex before
// it starts programs
linker->defineSymbol("tls_value", (tlsindex + 4 > s1addr) ?
get_le32(obuf + tlsindex - s1addr - ic) : 0);
linker->defineSymbol("tls_address", tlsindex - rvamin);
linker->defineSymbol("icon_delta", icondir_count - 1);
linker->defineSymbol("icon_offset", ncsection + icondir_offset - rvamin);
const unsigned esi0 = s1addr + ic;
linker->defineSymbol("start_of_uncompressed", 0u - esi0 + rvamin);
linker->defineSymbol("start_of_compressed", esi0 + ih.imagebase);
if (use_tls_callbacks)
{
//esi is ih.imagebase + rvamin
linker->defineSymbol("tls_callbacks_ptr", tlscb_ptr);
linker->defineSymbol("tls_module_base", 0u - rvamin);
}
linker->defineSymbol(isdll ? "PEISDLL1" : "PEMAIN01", upxsection);
//linker->dumpSymbols();
}
void PackW32Pe::addNewRelocations(Reloc &rel, unsigned)
{
rel.add(linker->getSymbolOffset("PEMAIN01") + 2, 3);
if (use_tls_callbacks)
{
tls_handler_offset = linker->getSymbolOffset("PETLSC2");
//add relocation entry for TLS callback handler
rel.add(tls_handler_offset + 4, 3);
}
}
void PackW32Pe::setOhDataBase(const pe_section_t *osection)
{
oh.database = osection[2].vaddr;
}
void PackW32Pe::setOhHeaderSize(const pe_section_t *)
{
oh.headersize = rvamin; // FIXME
}
void PackW32Pe::pack(OutputFile *fo)
{
super::pack0(fo, 0x0c, 0x400000, false);
#if 0
// FIXME: we need to think about better support for --exact
if (opt->exact)
throwCantPackExact();
@@ -854,6 +965,7 @@ void PackW32Pe::pack(OutputFile *fo)
// finally check the compression ratio
if (!checkFinalCompressionRatio(fo))
throwNotCompressible();
#endif
}
/*
+7 -4
View File
@@ -47,6 +47,13 @@ public:
virtual const int *getCompressionMethods(int method, int level) const;
virtual const int *getFilters() const;
virtual bool handleForceOption();
virtual void defineSymbols(unsigned ncsection, unsigned upxsection,
unsigned sizeof_oh, unsigned isize_isplit,
Reloc &rel, unsigned s1addr);
virtual void addNewRelocations(Reloc &, unsigned upxsection);
virtual void setOhDataBase(const pe_section_t *osection);
virtual void setOhHeaderSize(const pe_section_t *osection);
virtual void pack(OutputFile *fo);
virtual bool canPack();
@@ -56,10 +63,6 @@ protected:
virtual void buildLoader(const Filter *ft);
virtual Linker* newLinker() const;
bool isrtm;
bool use_dep_hack;
bool use_clear_dirty_stack;
};
+101 -24
View File
@@ -42,16 +42,6 @@
static const
#include "stub/amd64-win64.pep.h"
#define IDSIZE(x) ih.ddirs[x].size
#define IDADDR(x) ih.ddirs[x].vaddr
#define ODSIZE(x) oh.ddirs[x].size
#define ODADDR(x) oh.ddirs[x].vaddr
#define isdll ((ih.flags & DLL_FLAG) != 0)
#define FILLVAL 0
/*************************************************************************
//
**************************************************************************/
@@ -153,20 +143,6 @@ Linker* PackW64Pep::newLinker() const
}
/*************************************************************************
// util
**************************************************************************/
int PackW64Pep::readFileHeader()
{
char buf[6];
fi->seek(0x200, SEEK_SET);
fi->readx(buf, 6);
isrtm = 0;
return super::readFileHeader();
}
/*************************************************************************
// pack
**************************************************************************/
@@ -267,9 +243,109 @@ void PackW64Pep::buildLoader(const Filter *ft)
addLoader("IDENTSTR,UPX1HEAD", NULL);
}
bool PackW64Pep::handleForceOption()
{
return (ih.cpu != 0x8664) //CPU magic of AMD64 is 0x8664
|| (ih.opthdrsize != 0xF0) //optional header size is 0xF0 in PE32+ files - Stefan Widmann
|| (ih.coffmagic != 0x20B) //COFF magic is 0x20B in PE+ files, 0x10B in "normal" 32 bit PE files - Stefan Widmann
|| ((ih.flags & EXECUTABLE) == 0)
|| ((ih.flags & BITS_32_MACHINE) == 1) //NEW: 32 bit machine flag may not be set - Stefan Widmann
|| (ih.entry == 0 && !isdll)
|| (ih.ddirsentries != 16)
;
}
void PackW64Pep::defineSymbols(unsigned ncsection, unsigned upxsection,
unsigned sizeof_oh, unsigned ic,
Reloc &, unsigned s1addr)
{
const unsigned myimport = ncsection + soresources - rvamin;
// patch loader
linker->defineSymbol("original_entry", ih.entry);
if (use_dep_hack)
{
// This works around a "protection" introduced in MSVCRT80, which
// works like this:
// When the compiler detects that it would link in some code from its
// C runtime library which references some data in a read only
// section then it compiles in a runtime check whether that data is
// still in a read only section by looking at the pe header of the
// file. If this check fails the runtime does "interesting" things
// like not running the floating point initialization code - the result
// is a R6002 runtime error.
// These supposed to be read only addresses are covered by the sections
// UPX0 & UPX1 in the compressed files, so we have to patch the PE header
// in the memory. And the page on which the PE header is stored is read
// only so we must make it rw, fix the flags (i.e. clear
// PEFL_WRITE of osection[x].flags), and make it ro again.
// rva of the most significant byte of member "flags" in section "UPX0"
const unsigned swri = pe_offset + sizeof_oh + sizeof(pe_section_t) - 1;
// make sure we only touch the minimum number of pages
const unsigned addr = 0u - rvamin + swri;
linker->defineSymbol("swri", addr & 0xfff); // page offset
// check whether osection[0].flags and osection[1].flags
// are on the same page
linker->defineSymbol("vp_size", ((addr & 0xfff) + 0x28 >= 0x1000) ?
0x2000 : 0x1000); // 2 pages or 1 page
linker->defineSymbol("vp_base", addr &~ 0xfff); // page mask
linker->defineSymbol("VirtualProtect", myimport +
ilinkerGetAddress("kernel32.dll", "VirtualProtect"));
}
linker->defineSymbol("start_of_relocs", crelocs);
if (!isdll)
linker->defineSymbol("ExitProcess", myimport +
ilinkerGetAddress("kernel32.dll", "ExitProcess"));
linker->defineSymbol("GetProcAddress", myimport +
ilinkerGetAddress("kernel32.dll", "GetProcAddress"));
linker->defineSymbol("kernel32_ordinals", myimport);
linker->defineSymbol("LoadLibraryA", myimport +
ilinkerGetAddress("kernel32.dll", "LoadLibraryA"));
linker->defineSymbol("start_of_imports", myimport);
linker->defineSymbol("compressed_imports", cimports);
if (M_IS_LZMA(ph.method))
{
linker->defineSymbol("lzma_c_len", ph.c_len - 2);
linker->defineSymbol("lzma_u_len", ph.u_len);
}
linker->defineSymbol("filter_buffer_start", ih.codebase - rvamin);
// in case of overlapping decompression, this hack is needed,
// because windoze zeroes the word pointed by tlsindex before
// it starts programs
linker->defineSymbol("tls_value", (tlsindex + 4 > s1addr) ?
get_le32(obuf + tlsindex - s1addr - ic) : 0);
linker->defineSymbol("tls_address", tlsindex - rvamin);
linker->defineSymbol("icon_delta", icondir_count - 1);
linker->defineSymbol("icon_offset", ncsection + icondir_offset - rvamin);
const unsigned esi0 = s1addr + ic;
linker->defineSymbol("start_of_uncompressed", 0u - esi0 + rvamin);
linker->defineSymbol("start_of_compressed", esi0);
if (use_tls_callbacks)
{
linker->defineSymbol("tls_callbacks_ptr", tlscb_ptr - ih.imagebase);
linker->defineSymbol("tls_module_base", 0u - rvamin);
}
linker->defineSymbol("START", upxsection);
}
void PackW64Pep::setOhHeaderSize(const pe_section_t *)
{
oh.headersize = rvamin; // FIXME
}
void PackW64Pep::pack(OutputFile *fo)
{
// FIXME: Relocation stripping disabled for now - Stefan Widmann
opt->win32_pe.strip_relocs = false;
super::pack0(fo, 0x0c, 0x0000000140000000ULL);
#if 0
// FIXME: we need to think about better support for --exact
if (opt->exact)
throwCantPackExact();
@@ -856,6 +932,7 @@ void PackW64Pep::pack(OutputFile *fo)
if (!checkFinalCompressionRatio(fo))
throwNotCompressible();
#endif
}
/*
+6 -2
View File
@@ -46,13 +46,17 @@ public:
virtual const int *getCompressionMethods(int method, int level) const;
virtual const int *getFilters() const;
virtual bool handleForceOption();
virtual void defineSymbols(unsigned ncsection, unsigned upxsection,
unsigned sizeof_oh, unsigned isize_isplit,
Reloc &rel, unsigned s1addr);
virtual void setOhDataBase(const pe_section_t *) {}
virtual void setOhHeaderSize(const pe_section_t *osection);
virtual void pack(OutputFile *fo);
virtual bool canPack();
protected:
virtual int readFileHeader();
virtual void buildLoader(const Filter *ft);
virtual Linker* newLinker() const;
+536
View File
@@ -463,6 +463,7 @@ void PeFile32::processRelocs() // pass1
info("Relocations: original size: %u bytes, preprocessed size: %u bytes",(unsigned) IDSIZE(PEDIR_RELOC),sorelocs);
}
// FIXME - this is too similar to PeFile32::processRelocs
void PeFile64::processRelocs() // pass1
{
big_relocs = 0;
@@ -1990,6 +1991,527 @@ unsigned PeFile::stripDebug(unsigned overlaystart)
// pack
**************************************************************************/
void PeFile::readSectionHeaders(unsigned objs, unsigned sizeof_ih)
{
isection = new pe_section_t[objs];
fi->seek(pe_offset+sizeof_ih,SEEK_SET);
fi->readx(isection,sizeof(pe_section_t)*objs);
rvamin = isection[0].vaddr;
infoHeader("[Processing %s, format %s, %d sections]", fn_basename(fi->getName()), getName(), objs);
}
void PeFile::checkHeaderValues(unsigned subsystem, unsigned mask,
unsigned ih_entry, unsigned ih_filealign)
{
if ((1u << subsystem) & mask)
{
char buf[100];
upx_snprintf(buf, sizeof(buf), "PE: subsystem %u is not supported",
subsystem);
throwCantPack(buf);
}
//check CLR Runtime Header directory entry
if (IDSIZE(PEDIR_COMRT))
throwCantPack(".NET files are not yet supported");
if (memcmp(isection[0].name,"UPX",3) == 0)
throwAlreadyPackedByUPX();
if (!opt->force && IDSIZE(15))
throwCantPack("file is possibly packed/protected (try --force)");
if (ih_entry && ih_entry < rvamin)
throwCantPack("run a virus scanner on this file!");
if (ih_filealign < 0x200)
throwCantPack("filealign < 0x200 is not yet supported");
}
unsigned PeFile::handleStripRelocs(upx_uint64_t ih_imagebase,
upx_uint64_t default_imagebase,
unsigned dllflags)
{
if (dllflags & IMAGE_DLL_CHARACTERISTICS_DYNAMIC_BASE)
opt->win32_pe.strip_relocs = false;
else if (isdll) //do never strip relocations from DLLs
opt->win32_pe.strip_relocs = false;
else if (opt->win32_pe.strip_relocs < 0)
opt->win32_pe.strip_relocs = (ih_imagebase >= default_imagebase);
if (opt->win32_pe.strip_relocs)
{
if (ih_imagebase < default_imagebase)
throwCantPack("--strip-relocs is not allowed with this imagebase");
else
return RELOCS_STRIPPED;
}
return 0;
}
unsigned PeFile::readSections(unsigned objs, unsigned usize,
unsigned ih_filealign, unsigned ih_datasize)
{
const unsigned xtrasize = UPX_MAX(ih_datasize, 65536u) + IDSIZE(PEDIR_IMPORT)
+ IDSIZE(PEDIR_BOUNDIM) + IDSIZE(PEDIR_IAT) + IDSIZE(PEDIR_DELAYIMP)
+ IDSIZE(PEDIR_RELOC);
ibuf.alloc(usize + xtrasize);
// BOUND IMPORT support. FIXME: is this ok?
fi->seek(0,SEEK_SET);
fi->readx(ibuf,isection[0].rawdataptr);
//Interval holes(ibuf);
unsigned ic,jc,overlaystart = 0;
ibuf.clear(0, usize);
for (ic = jc = 0; ic < objs; ic++)
{
if (isection[ic].rawdataptr && overlaystart < isection[ic].rawdataptr + isection[ic].size)
overlaystart = ALIGN_UP(isection[ic].rawdataptr + isection[ic].size,ih_filealign);
if (isection[ic].vsize == 0)
isection[ic].vsize = isection[ic].size;
if ((isection[ic].flags & PEFL_BSS) || isection[ic].rawdataptr == 0
|| (isection[ic].flags & PEFL_INFO))
{
//holes.add(isection[ic].vaddr,isection[ic].vsize);
continue;
}
if (isection[ic].vaddr + isection[ic].size > usize)
throwCantPack("section size problem");
if (!isrtm && ((isection[ic].flags & (PEFL_WRITE|PEFL_SHARED))
== (PEFL_WRITE|PEFL_SHARED)))
if (!opt->force)
throwCantPack("writable shared sections not supported (try --force)");
if (jc && isection[ic].rawdataptr - jc > ih_filealign)
throwCantPack("superfluous data between sections");
fi->seek(isection[ic].rawdataptr,SEEK_SET);
jc = isection[ic].size;
if (jc > isection[ic].vsize)
jc = isection[ic].vsize;
if (isection[ic].vsize == 0) // hack for some tricky programs - may this break other progs?
jc = isection[ic].vsize = isection[ic].size;
if (isection[ic].vaddr + jc > ibuf.getSize())
throwInternalError("buffer too small 1");
fi->readx(ibuf + isection[ic].vaddr,jc);
jc += isection[ic].rawdataptr;
}
return overlaystart;
}
void PeFile::callCompressWithFilters(Filter &ft, int filter_strategy, unsigned ih_codebase)
{
compressWithFilters(&ft, 2048, NULL_cconf, filter_strategy,
ih_codebase, rvamin, 0, NULL, 0);
}
void PeFile::callProcessRelocs(Reloc &rel, unsigned &ic)
{
// wince wants relocation data at the beginning of a section
PeFile::processRelocs(&rel);
ODADDR(PEDIR_RELOC) = soxrelocs ? ic : 0;
ODSIZE(PEDIR_RELOC) = soxrelocs;
ic += soxrelocs;
}
void PeFile::callProcessResources(Resource &res, unsigned &ic)
{
if (soresources)
processResources(&res,ic);
ODADDR(PEDIR_RESOURCE) = soresources ? ic : 0;
ODSIZE(PEDIR_RESOURCE) = soresources;
ic += soresources;
}
template <typename LEXX, typename ht>
void PeFile::pack0(OutputFile *fo, ht &ih, ht &oh,
unsigned subsystem_mask, upx_uint64_t default_imagebase,
bool last_section_rsrc_only)
{
// FIXME: we need to think about better support for --exact
if (opt->exact)
throwCantPackExact();
const unsigned objs = ih.objects;
readSectionHeaders(objs, sizeof(ih));
if (!opt->force && handleForceOption())
throwCantPack("unexpected value in PE header (try --force)");
checkHeaderValues(ih.subsystem, subsystem_mask, ih.entry, ih.filealign);
//remove certificate directory entry
if (IDSIZE(PEDIR_SEC))
IDSIZE(PEDIR_SEC) = IDADDR(PEDIR_SEC) = 0;
ih.flags |= handleStripRelocs(ih.imagebase, default_imagebase, ih.dllflags);
handleStub(fi,fo,pe_offset);
unsigned overlaystart = readSections(objs, ih.imagesize, ih.filealign, ih.datasize);
unsigned overlay = file_size - stripDebug(overlaystart);
if (overlay >= (unsigned) file_size)
overlay = 0;
checkOverlay(overlay);
Resource res;
Interval tlsiv(ibuf);
Interval loadconfiv(ibuf);
Export xport((char*)(unsigned char*)ibuf);
const unsigned dllstrings = processImports();
processTls(&tlsiv); // call before processRelocs!!
processLoadConf(&loadconfiv);
processResources(&res);
processExports(&xport);
processRelocs();
//OutputFile::dump("x1", ibuf, usize);
// some checks for broken linkers - disable filter if necessary
bool allow_filter = true;
if (/*FIXME ih.codebase == ih.database
||*/ ih.codebase + ih.codesize > ih.imagesize
|| (isection[virta2objnum(ih.codebase,isection,objs)].flags & PEFL_CODE) == 0)
allow_filter = false;
const unsigned oam1 = ih.objectalign - 1;
// FIXME: disabled: the uncompressor would not allocate enough memory
//objs = tryremove(IDADDR(PEDIR_RELOC),objs);
// FIXME: if the last object has a bss then this won't work
// newvsize = (isection[objs-1].vaddr + isection[objs-1].size + oam1) &~ oam1;
// temporary solution:
unsigned newvsize = (isection[objs-1].vaddr + isection[objs-1].vsize + oam1) &~ oam1;
//fprintf(stderr,"newvsize=%x objs=%d\n",newvsize,objs);
if (newvsize + soimport + sorelocs > ibuf.getSize())
throwInternalError("buffer too small 2");
memcpy(ibuf+newvsize,oimport,soimport);
memcpy(ibuf+newvsize+soimport,orelocs,sorelocs);
cimports = newvsize - rvamin; // rva of preprocessed imports
crelocs = cimports + soimport; // rva of preprocessed fixups
ph.u_len = newvsize + soimport + sorelocs;
// some extra data for uncompression support
unsigned s = 0;
upx_byte * const p1 = ibuf + ph.u_len;
memcpy(p1 + s,&ih,sizeof (ih));
s += sizeof (ih);
memcpy(p1 + s,isection,ih.objects * sizeof(*isection));
s += ih.objects * sizeof(*isection);
if (soimport)
{
set_le32(p1 + s,cimports);
set_le32(p1 + s + 4,dllstrings);
s += 8;
}
if (sorelocs)
{
set_le32(p1 + s,crelocs);
p1[s + 4] = (unsigned char) (big_relocs & 6);
s += 5;
}
if (soresources)
{
set_le16(p1 + s,icondir_count);
s += 2;
}
// end of extra data
set_le32(p1 + s,ptr_diff(p1,ibuf) - rvamin);
s += 4;
ph.u_len += s;
obuf.allocForCompression(ph.u_len);
// prepare packheader
ph.u_len -= rvamin;
// prepare filter
Filter ft(ph.level);
ft.buf_len = ih.codesize;
ft.addvalue = ih.codebase - rvamin;
// compress
int filter_strategy = allow_filter ? 0 : -3;
// disable filters for files with broken headers
if (ih.codebase + ih.codesize > ph.u_len)
{
ft.buf_len = 1;
filter_strategy = -3;
}
callCompressWithFilters(ft, filter_strategy, ih.codebase);
// info: see buildLoader()
newvsize = (ph.u_len + rvamin + ph.overlap_overhead + oam1) &~ oam1;
if (tlsindex && ((newvsize - ph.c_len - 1024 + oam1) &~ oam1) > tlsindex + 4)
tlsindex = 0;
int identsize = 0;
const unsigned codesize = getLoaderSection("IDENTSTR",&identsize);
assert(identsize > 0);
unsigned ic;
getLoaderSection("UPX1HEAD",(int*)&ic);
identsize += ic;
const unsigned oobjs = last_section_rsrc_only ? 4 : 3;
pe_section_t osection[oobjs];
// section 0 : bss
// 1 : [ident + header] + packed_data + unpacker + tls + loadconf
// 2 : not compressed data
// 3 : resource data -- wince 5 needs a new section for this
// the last section should start with the resource data, because lots of lame
// windoze codes assume that resources starts on the beginning of a section
// note: there should be no data in the last section which needs fixup
// identsplit - number of ident + (upx header) bytes to put into the PE header
int identsplit = pe_offset + sizeof(osection) + sizeof(oh);
if ((identsplit & 0x1ff) == 0)
identsplit = 0;
else if (((identsplit + identsize) ^ identsplit) < 0x200)
identsplit = identsize;
else
identsplit = ALIGN_GAP(identsplit, 0x200);
ic = identsize - identsplit;
const unsigned c_len = ((ph.c_len + ic) & 15) == 0 ? ph.c_len : ph.c_len + 16 - ((ph.c_len + ic) & 15);
obuf.clear(ph.c_len, c_len - ph.c_len);
const unsigned s1size = ALIGN_UP(ic + c_len + codesize, (unsigned) sizeof(LEXX)) + sotls + soloadconf;
const unsigned s1addr = (newvsize - (ic + c_len) + oam1) &~ oam1;
const unsigned ncsection = (s1addr + s1size + oam1) &~ oam1;
const unsigned upxsection = s1addr + ic + c_len;
Reloc rel(1024); // new relocations are put here
addNewRelocations(rel, upxsection);
// new PE header
memcpy(&oh,&ih,sizeof(oh));
oh.filealign = 0x200; // identsplit depends on this
memset(osection,0,sizeof(osection));
oh.entry = upxsection;
oh.objects = oobjs;
oh.chksum = 0;
// fill the data directory
ODADDR(PEDIR_DEBUG) = 0;
ODSIZE(PEDIR_DEBUG) = 0;
ODADDR(PEDIR_IAT) = 0;
ODSIZE(PEDIR_IAT) = 0;
ODADDR(PEDIR_BOUNDIM) = 0;
ODSIZE(PEDIR_BOUNDIM) = 0;
// tls & loadconf are put into section 1
ic = s1addr + s1size - sotls - soloadconf;
processTls(&rel,&tlsiv,ic);
ODADDR(PEDIR_TLS) = sotls ? ic : 0;
ODSIZE(PEDIR_TLS) = sotls ? (sizeof(LEXX) == 4 ? 0x18 : 0x28) : 0;
ic += sotls;
processLoadConf(&rel, &loadconfiv, ic);
ODADDR(PEDIR_LOADCONF) = soloadconf ? ic : 0;
ODSIZE(PEDIR_LOADCONF) = soloadconf;
ic += soloadconf;
const bool rel_at_sections_start = oobjs == 4;
ic = ncsection;
if (!last_section_rsrc_only)
callProcessResources(res, ic);
if (rel_at_sections_start)
callProcessRelocs(rel, ic);
PeFile::processImports(ic, getProcessImportParam(upxsection));
ODADDR(PEDIR_IMPORT) = ic;
ODSIZE(PEDIR_IMPORT) = soimpdlls;
ic += soimpdlls;
processExports(&xport,ic);
ODADDR(PEDIR_EXPORT) = soexport ? ic : 0;
ODSIZE(PEDIR_EXPORT) = soexport;
if (!isdll && opt->win32_pe.compress_exports)
{
ODADDR(PEDIR_EXPORT) = IDADDR(PEDIR_EXPORT);
ODSIZE(PEDIR_EXPORT) = IDSIZE(PEDIR_EXPORT);
}
ic += soexport;
if (!rel_at_sections_start)
callProcessRelocs(rel, ic);
// when the resource is put alone into section 3
const unsigned res_start = (ic + oam1) &~ oam1;;
if (last_section_rsrc_only)
callProcessResources(res, ic);
defineSymbols(ncsection, upxsection, sizeof(oh),
identsize - identsplit, rel, s1addr);
defineFilterSymbols(&ft);
relocateLoader();
const unsigned lsize = getLoaderSize();
MemBuffer loader(lsize);
memcpy(loader,getLoader(),lsize);
patchPackHeader(loader, lsize);
const unsigned ncsize = soxrelocs + soimpdlls + soexport
+ (!last_section_rsrc_only ? soresources : 0);
const unsigned fam1 = oh.filealign - 1;
// this one is tricky: it seems windoze touches 4 bytes after
// the end of the relocation data - so we have to increase
// the virtual size of this section
const unsigned ncsize_virt_increase = (ncsize & oam1) == 0 ? 8 : 0;
// fill the sections
strcpy(osection[0].name,"UPX0");
strcpy(osection[1].name,"UPX1");
// after some windoze debugging I found that the name of the sections
// DOES matter :( .rsrc is used by oleaut32.dll (TYPELIBS)
// and because of this lame dll, the resource stuff must be the
// first in the 3rd section - the author of this dll seems to be
// too idiot to use the data directories... M$ suxx 4 ever!
// ... even worse: exploder.exe in NiceTry also depends on this to
// locate version info
strcpy(osection[2].name, !last_section_rsrc_only && soresources ? ".rsrc" : "UPX2");
osection[0].vaddr = rvamin;
osection[1].vaddr = s1addr;
osection[2].vaddr = ncsection;
osection[0].size = 0;
osection[1].size = (s1size + fam1) &~ fam1;
osection[2].size = (ncsize + fam1) &~ fam1;
osection[0].vsize = osection[1].vaddr - osection[0].vaddr;
if (oobjs == 3)
{
osection[1].vsize = (osection[1].size + oam1) &~ oam1;
osection[2].vsize = (osection[2].size + ncsize_virt_increase + oam1) &~ oam1;
oh.imagesize = (osection[3].vaddr + osection[3].vsize + oam1) &~ oam1;
osection[0].rawdataptr = (pe_offset + sizeof(oh) + sizeof(osection) + fam1) &~ fam1;
osection[1].rawdataptr = osection[0].rawdataptr;
osection[2].rawdataptr = osection[1].rawdataptr + osection[1].size;
}
else
{
osection[1].vsize = osection[1].size;
osection[2].vsize = osection[2].size;
oh.imagesize = osection[2].vaddr + osection[2].vsize;
osection[0].rawdataptr = 0;
osection[1].rawdataptr = (pe_offset + sizeof(oh) + sizeof(osection) + fam1) &~ fam1;
}
osection[2].rawdataptr = osection[1].rawdataptr + osection[1].size;
osection[0].flags = (unsigned) (PEFL_BSS|PEFL_EXEC|PEFL_WRITE|PEFL_READ);
osection[1].flags = (unsigned) (PEFL_DATA|PEFL_EXEC|PEFL_WRITE|PEFL_READ);
osection[2].flags = (unsigned) (PEFL_DATA|PEFL_WRITE|PEFL_READ);
if (oobjs == 4)
{
strcpy(osection[3].name, ".rsrc");
osection[3].vaddr = res_start;
osection[3].size = (soresources + fam1) &~ fam1;
osection[3].vsize = osection[3].size;
osection[3].rawdataptr = osection[2].rawdataptr + osection[2].size;
osection[2].flags = (unsigned) (PEFL_DATA|PEFL_READ);
osection[3].flags = (unsigned) (PEFL_DATA|PEFL_READ);
if (soresources == 0)
{
oh.objects = 3;
memset(&osection[3], 0, sizeof(osection[3]));
}
}
oh.bsssize = osection[0].vsize;
oh.datasize = osection[2].vsize + (oobjs > 3 ? osection[3].vsize : 0);
setOhDataBase(osection);
oh.codesize = osection[1].vsize;
oh.codebase = osection[1].vaddr;
setOhHeaderSize(osection);
if (rvamin < osection[0].rawdataptr)
throwCantPack("object alignment too small");
if (opt->win32_pe.strip_relocs && !isdll)
oh.flags |= RELOCS_STRIPPED;
//for (ic = 0; ic < oh.filealign; ic += 4)
// set_le32(ibuf + ic,get_le32("UPX "));
ibuf.clear(0, oh.filealign);
info("Image size change: %u -> %u KiB",
ih.imagesize / 1024, oh.imagesize / 1024);
infoHeader("[Writing compressed file]");
// write loader + compressed file
fo->write(&oh,sizeof(oh));
fo->write(osection,sizeof(osection));
// some alignment
if (identsplit == identsize)
{
unsigned n = osection[oobjs == 3 ? 0 : 1].rawdataptr - fo->getBytesWritten() - identsize;
assert(n <= oh.filealign);
fo->write(ibuf, n);
}
fo->write(loader + codesize,identsize);
infoWriting("loader", fo->getBytesWritten());
fo->write(obuf,c_len);
infoWriting("compressed data", c_len);
fo->write(loader,codesize);
if (opt->debug.dump_stub_loader)
OutputFile::dump(opt->debug.dump_stub_loader, loader, codesize);
if ((ic = fo->getBytesWritten() & (sizeof(LEXX) - 1)) != 0)
fo->write(ibuf, sizeof(LEXX) - ic);
fo->write(otls,sotls);
fo->write(oloadconf, soloadconf);
if ((ic = fo->getBytesWritten() & fam1) != 0)
fo->write(ibuf,oh.filealign - ic);
if (!last_section_rsrc_only)
fo->write(oresources,soresources);
else
fo->write(oxrelocs,soxrelocs);
fo->write(oimpdlls,soimpdlls);
fo->write(oexport,soexport);
fo->write(oxrelocs,soxrelocs);
if (!last_section_rsrc_only)
fo->write(oxrelocs,soxrelocs);
if ((ic = fo->getBytesWritten() & fam1) != 0)
fo->write(ibuf,oh.filealign - ic);
if (last_section_rsrc_only)
{
fo->write(oresources,soresources);
if ((ic = fo->getBytesWritten() & fam1) != 0)
fo->write(ibuf,oh.filealign - ic);
}
#if 0
printf("%-13s: program hdr : %8ld bytes\n", getName(), (long) sizeof(oh));
printf("%-13s: sections : %8ld bytes\n", getName(), (long) sizeof(osection));
printf("%-13s: ident : %8ld bytes\n", getName(), (long) identsize);
printf("%-13s: compressed : %8ld bytes\n", getName(), (long) c_len);
printf("%-13s: decompressor : %8ld bytes\n", getName(), (long) codesize);
printf("%-13s: tls : %8ld bytes\n", getName(), (long) sotls);
printf("%-13s: resources : %8ld bytes\n", getName(), (long) soresources);
printf("%-13s: imports : %8ld bytes\n", getName(), (long) soimpdlls);
printf("%-13s: exports : %8ld bytes\n", getName(), (long) soexport);
printf("%-13s: relocs : %8ld bytes\n", getName(), (long) soxrelocs);
printf("%-13s: loadconf : %8ld bytes\n", getName(), (long) soloadconf);
#endif
// verify
verifyOverlappingDecompression();
// copy the overlay
copyOverlay(fo, overlay, &obuf);
// finally check the compression ratio
if (!checkFinalCompressionRatio(fo))
throwNotCompressible();
}
/*************************************************************************
// unpack
@@ -2454,6 +2976,14 @@ void PeFile32::readPeHeader()
isdll = ((ih.flags & DLL_FLAG) != 0);
}
void PeFile32::pack0(OutputFile *fo, unsigned subsystem_mask,
upx_uint64_t default_imagebase,
bool last_section_rsrc_only)
{
super::pack0<LE32>(fo, ih, oh, subsystem_mask,
default_imagebase, last_section_rsrc_only);
}
void PeFile32::unpack(OutputFile *fo)
{
bool set_oft = getFormat() == UPX_F_WINCE_ARM_PE;
@@ -2503,6 +3033,12 @@ void PeFile64::readPeHeader()
isdll = ((ih.flags & DLL_FLAG) != 0);
}
void PeFile64::pack0(OutputFile *fo, unsigned subsystem_mask,
upx_uint64_t default_imagebase)
{
super::pack0<LE64>(fo, ih, oh, subsystem_mask, default_imagebase, false);
}
void PeFile64::unpack(OutputFile *fo)
{
super::unpack<pe_header_t, LE64>(fo, ih, oh, 1ULL << 63, false);
+42
View File
@@ -43,11 +43,39 @@ protected:
class Resource;
class Export;
class ImportLinker;
struct pe_section_t;
PeFile(InputFile *f);
virtual ~PeFile();
virtual int getVersion() const { return 13; }
void readSectionHeaders(unsigned objs, unsigned sizeof_ih);
unsigned readSections(unsigned objs, unsigned usize,
unsigned ih_filealign, unsigned ih_datasize);
void checkHeaderValues(unsigned subsystem, unsigned mask,
unsigned ih_entry, unsigned ih_filealign);
unsigned handleStripRelocs(upx_uint64_t ih_imagebase,
upx_uint64_t default_imagebase,
unsigned dllflags);
virtual bool handleForceOption() = 0;
virtual void callCompressWithFilters(Filter &, int filter_strategy,
unsigned ih_codebase);
virtual void defineSymbols(unsigned ncsection, unsigned upxsection,
unsigned sizeof_oh, unsigned isize_isplit,
Reloc &rel, unsigned s1addr) = 0;
virtual void addNewRelocations(Reloc &, unsigned) {}
void callProcessRelocs(Reloc &rel, unsigned &ic);
void callProcessResources(Resource &res, unsigned &ic);
virtual unsigned getProcessImportParam(unsigned) { return 0; }
virtual void setOhDataBase(const pe_section_t *osection) = 0;
virtual void setOhHeaderSize(const pe_section_t *osection) = 0;
template <typename LEXX, typename ht>
void pack0(OutputFile *fo, ht &ih, ht &oh,
unsigned subsystem_mask, upx_uint64_t default_imagebase,
bool last_section_rsrc_only);
template <typename ht, typename LEXX, typename ord_mask_t>
void unpack(OutputFile *fo, const ht &ih, ht &oh,
ord_mask_t ord_mask, bool set_oft);
@@ -72,6 +100,7 @@ protected:
template <typename LEXX, typename ord_mask_t>
void rebuildImports(upx_byte *& extrainfo,
ord_mask_t ord_mask, bool set_oft);
virtual unsigned processImports() = 0;
virtual void processImports(unsigned, unsigned);
upx_byte *oimport;
unsigned soimport;
@@ -112,6 +141,9 @@ protected:
template <typename LEXX>
void processTls2(Reloc *rel,const Interval *iv,unsigned newaddr,
typename tls_traits<LEXX>::cb_value_t imagebase); // pass 2
virtual void processTls(Interval *iv) = 0;
virtual void processTls(Reloc *r, const Interval *iv, unsigned a) = 0;
void rebuildTls();
upx_byte *otls;
unsigned sotls;
@@ -161,6 +193,10 @@ protected:
pe_section_t *isection;
bool isdll;
bool isrtm;
bool use_dep_hack;
bool use_clear_dirty_stack;
static unsigned virta2objnum (unsigned, pe_section_t *, unsigned);
unsigned tryremove (unsigned, unsigned);
@@ -377,6 +413,8 @@ class PeFile32 : public PeFile
protected:
PeFile32(InputFile *f);
virtual ~PeFile32();
void pack0(OutputFile *fo, unsigned subsystem_mask,
upx_uint64_t default_imagebase, bool last_section_rsrc_only);
virtual void unpack(OutputFile *fo);
virtual int canUnpack();
@@ -435,6 +473,10 @@ class PeFile64 : public PeFile
protected:
PeFile64(InputFile *f);
virtual ~PeFile64();
void pack0(OutputFile *fo, unsigned subsystem_mask,
upx_uint64_t default_imagebase);
virtual void unpack(OutputFile *fo);
virtual int canUnpack();