#include <assert.h>
#include "MachOFileAbstraction.hpp"
#include "DyldSharedCache.h"
#include "CacheBuilder.h"
#include "Diagnostics.h"
#include "IMPCaches.hpp"
CacheBuilder::CacheBuilder(const DyldSharedCache::CreateOptions& options, const dyld3::closure::FileSystem& fileSystem)
: _options(options)
, _fileSystem(fileSystem)
, _fullAllocatedBuffer(0)
, _diagnostics(options.loggingPrefix, options.verbose)
, _allocatedBufferSize(0)
{
}
CacheBuilder::~CacheBuilder() {
}
std::string CacheBuilder::errorMessage()
{
return _diagnostics.errorMessage();
}
void CacheBuilder::copyRawSegments()
{
const bool log = false;
const bool logCFConstants = false;
forEachDylibInfo(^(const DylibInfo& dylib, Diagnostics& dylibDiag) {
for (const SegmentMappingInfo& info : dylib.cacheLocation) {
if (log) fprintf(stderr, "copy %s segment %s (0x%08X bytes) from %p to %p (logical addr 0x%llX) for %s\n",
_options.archs->name(), info.segName, info.copySegmentSize, info.srcSegment, info.dstSegment, info.dstCacheUnslidAddress, dylib.input->mappedFile.runtimePath.c_str());
::memcpy(info.dstSegment, info.srcSegment, info.copySegmentSize);
}
});
const uint64_t numCoalescedSections = sizeof(CacheCoalescedText::SupportedSections) / sizeof(*CacheCoalescedText::SupportedSections);
dispatch_apply(numCoalescedSections, DISPATCH_APPLY_AUTO, ^(size_t index) {
const CacheCoalescedText::StringSection& cacheStringSection = _coalescedText.getSectionData(CacheCoalescedText::SupportedSections[index]);
if (log) fprintf(stderr, "copy %s __TEXT_COAL section %s (0x%08X bytes) to %p (logical addr 0x%llX)\n",
_options.archs->name(), CacheCoalescedText::SupportedSections[index],
cacheStringSection.bufferSize, cacheStringSection.bufferAddr, cacheStringSection.bufferVMAddr);
for (const auto& stringAndOffset : cacheStringSection.stringsToOffsets)
::memcpy(cacheStringSection.bufferAddr + stringAndOffset.second, stringAndOffset.first.data(), stringAndOffset.first.size() + 1);
});
if ( _coalescedText.cfStrings.bufferSize != 0 ) {
uint8_t* dstBuffer = _coalescedText.cfStrings.bufferAddr;
uint64_t dstBufferVMAddr = _coalescedText.cfStrings.bufferVMAddr;
forEachDylibInfo(^(const DylibInfo& dylib, Diagnostics& dylibDiag) {
const char* segmentName = "__OBJC_CONST";
const char* sectionName = "__cfstring";
const DylibTextCoalescer::DylibSectionOffsetToCacheSectionOffset& sectionData = dylib.textCoalescer.getSectionCoalescer(segmentName, sectionName);
if ( sectionData.empty() )
return;
uint64_t sectionContentSize = 0;
const void* sectionContent = dylib.input->mappedFile.mh->findSectionContent(segmentName, sectionName, sectionContentSize);
assert(sectionContent != nullptr);
assert(sectionContentSize != 0);
for (const auto& dylibOffsetAndCacheOffset : sectionData) {
uint64_t dylibOffset = dylibOffsetAndCacheOffset.first;
uint64_t cacheOffset = dylibOffsetAndCacheOffset.second;
if (logCFConstants) fprintf(stderr, "copy %s %s section %s (0x%08X bytes) to %p (logical addr 0x%llX)\n",
_options.archs->name(), segmentName, sectionName,
(uint32_t)DyldSharedCache::ConstantClasses::cfStringAtomSize, dstBuffer + cacheOffset, dstBufferVMAddr + cacheOffset);
::memcpy(dstBuffer + cacheOffset, (const uint8_t*)sectionContent + dylibOffset, (size_t)DyldSharedCache::ConstantClasses::cfStringAtomSize);
}
});
}
}
void CacheBuilder::adjustAllImagesForNewSegmentLocations(uint64_t cacheBaseAddress,
ASLR_Tracker& aslrTracker, LOH_Tracker* lohTracker,
const CacheBuilder::CacheCoalescedText* coalescedText)
{
__block bool badDylib = false;
forEachDylibInfo(^(const DylibInfo& dylib, Diagnostics& dylibDiag) {
if ( dylibDiag.hasError() )
return;
adjustDylibSegments(dylib, dylibDiag, cacheBaseAddress, aslrTracker,
lohTracker, coalescedText);
if ( dylibDiag.hasError() )
badDylib = true;
});
if ( badDylib && !_diagnostics.hasError() ) {
_diagnostics.error("One or more binaries has an error which prevented linking. See other errors.");
}
}
CacheBuilder::ASLR_Tracker::~ASLR_Tracker()
{
if ( _bitmap != nullptr )
::free(_bitmap);
#if BUILDING_APP_CACHE_UTIL
if ( _cacheLevels != nullptr )
::free(_cacheLevels);
#endif
}
void CacheBuilder::ASLR_Tracker::setDataRegion(const void* rwRegionStart, size_t rwRegionSize)
{
_pageCount = (unsigned)(rwRegionSize+_pageSize-1)/_pageSize;
_regionStart = (uint8_t*)rwRegionStart;
_regionEnd = (uint8_t*)rwRegionStart + rwRegionSize;
_bitmap = (bool*)calloc(_pageCount*(_pageSize/kMinimumFixupAlignment)*sizeof(bool), 1);
#if BUILDING_APP_CACHE_UTIL
size_t cacheLevelsSize = (_pageCount*(_pageSize/kMinimumFixupAlignment)*sizeof(uint8_t));
_cacheLevels = (uint8_t*)malloc(cacheLevelsSize);
memset(_cacheLevels, (int)~0U, cacheLevelsSize);
#endif
}
void CacheBuilder::ASLR_Tracker::add(void* loc, uint8_t level)
{
if (!_enabled)
return;
uint8_t* p = (uint8_t*)loc;
assert(p >= _regionStart);
assert(p < _regionEnd);
_bitmap[(p-_regionStart)/kMinimumFixupAlignment] = true;
#if BUILDING_APP_CACHE_UTIL
if ( level != (uint8_t)~0U ) {
_cacheLevels[(p-_regionStart)/kMinimumFixupAlignment] = level;
}
#endif
}
void CacheBuilder::ASLR_Tracker::remove(void* loc)
{
if (!_enabled)
return;
uint8_t* p = (uint8_t*)loc;
assert(p >= _regionStart);
assert(p < _regionEnd);
_bitmap[(p-_regionStart)/kMinimumFixupAlignment] = false;
}
bool CacheBuilder::ASLR_Tracker::has(void* loc, uint8_t* level) const
{
if (!_enabled)
return true;
uint8_t* p = (uint8_t*)loc;
assert(p >= _regionStart);
assert(p < _regionEnd);
if ( _bitmap[(p-_regionStart)/kMinimumFixupAlignment] ) {
#if BUILDING_APP_CACHE_UTIL
if ( level != nullptr ) {
uint8_t levelValue = _cacheLevels[(p-_regionStart)/kMinimumFixupAlignment];
if ( levelValue != (uint8_t)~0U )
*level = levelValue;
}
#endif
return true;
}
return false;
}
void CacheBuilder::ASLR_Tracker::setHigh8(void* p, uint8_t high8)
{
_high8Map[p] = high8;
}
void CacheBuilder::ASLR_Tracker::setAuthData(void* p, uint16_t diversity, bool hasAddrDiv, uint8_t key)
{
_authDataMap[p] = {diversity, hasAddrDiv, key};
}
void CacheBuilder::ASLR_Tracker::setRebaseTarget32(void*p, uint32_t targetVMAddr)
{
_rebaseTarget32[p] = targetVMAddr;
}
void CacheBuilder::ASLR_Tracker::setRebaseTarget64(void*p, uint64_t targetVMAddr)
{
_rebaseTarget64[p] = targetVMAddr;
}
bool CacheBuilder::ASLR_Tracker::hasHigh8(void* p, uint8_t* highByte) const
{
auto pos = _high8Map.find(p);
if ( pos == _high8Map.end() )
return false;
*highByte = pos->second;
return true;
}
bool CacheBuilder::ASLR_Tracker::hasAuthData(void* p, uint16_t* diversity, bool* hasAddrDiv, uint8_t* key) const
{
auto pos = _authDataMap.find(p);
if ( pos == _authDataMap.end() )
return false;
*diversity = pos->second.diversity;
*hasAddrDiv = pos->second.addrDiv;
*key = pos->second.key;
return true;
}
bool CacheBuilder::ASLR_Tracker::hasRebaseTarget32(void* p, uint32_t* vmAddr) const
{
auto pos = _rebaseTarget32.find(p);
if ( pos == _rebaseTarget32.end() )
return false;
*vmAddr = pos->second;
return true;
}
bool CacheBuilder::ASLR_Tracker::hasRebaseTarget64(void* p, uint64_t* vmAddr) const
{
auto pos = _rebaseTarget64.find(p);
if ( pos == _rebaseTarget64.end() )
return false;
*vmAddr = pos->second;
return true;
}
std::vector<void*> CacheBuilder::ASLR_Tracker::getRebaseTargets() const {
std::vector<void*> targets;
for (const auto& target : _rebaseTarget32)
targets.push_back(target.first);
for (const auto& target : _rebaseTarget64)
targets.push_back(target.first);
return targets;
}
bool CacheBuilder::DylibTextCoalescer::segmentWasCoalesced(std::string_view segmentName) const {
if (segmentName.size() > 16)
segmentName = segmentName.substr(0, 16);
if ( segmentName == "__OBJC_CONST" ) {
return !cfStrings.empty();
}
return false;
}
bool CacheBuilder::DylibTextCoalescer::sectionWasCoalesced(std::string_view segmentName,
std::string_view sectionName) const {
if (segmentName.size() > 16)
segmentName = segmentName.substr(0, 16);
if (sectionName.size() > 16)
sectionName = sectionName.substr(0, 16);
if ( segmentName == "__TEXT" ) {
std::map<std::string_view, const DylibSectionOffsetToCacheSectionOffset*> supportedSections = {
{ "__objc_classname", &objcClassNames },
{ "__objc_methname", &objcMethNames },
{ "__objc_methtype", &objcMethTypes }
};
auto it = supportedSections.find(sectionName);
if (it == supportedSections.end())
return false;
return !it->second->empty();
}
if ( segmentName == "__OBJC_CONST" ) {
if ( sectionName == "__cfstring" ) {
return !cfStrings.empty();
}
}
return false;
}
CacheBuilder::DylibTextCoalescer::DylibSectionOffsetToCacheSectionOffset&
CacheBuilder::DylibTextCoalescer::getSectionCoalescer(std::string_view segmentName, std::string_view sectionName) {
if (segmentName.size() > 16)
segmentName = segmentName.substr(0, 16);
if (sectionName.size() > 16)
sectionName = sectionName.substr(0, 16);
if ( segmentName == "__TEXT" ) {
std::map<std::string_view, DylibSectionOffsetToCacheSectionOffset*> supportedSections = {
{ "__objc_classname", &objcClassNames },
{ "__objc_methname", &objcMethNames },
{ "__objc_methtype", &objcMethTypes }
};
auto it = supportedSections.find(sectionName);
assert(it != supportedSections.end());
return *it->second;
}
if ( segmentName == "__OBJC_CONST" ) {
if ( sectionName == "__cfstring" ) {
return cfStrings;
}
}
assert(false);
}
const CacheBuilder::DylibTextCoalescer::DylibSectionOffsetToCacheSectionOffset&
CacheBuilder::DylibTextCoalescer::getSectionCoalescer(std::string_view segmentName, std::string_view sectionName) const {
if (segmentName.size() > 16)
segmentName = segmentName.substr(0, 16);
if (sectionName.size() > 16)
sectionName = sectionName.substr(0, 16);
if ( segmentName == "__TEXT" ) {
std::map<std::string_view, const DylibSectionOffsetToCacheSectionOffset*> supportedSections = {
{ "__objc_classname", &objcClassNames },
{ "__objc_methname", &objcMethNames },
{ "__objc_methtype", &objcMethTypes }
};
auto it = supportedSections.find(sectionName);
assert(it != supportedSections.end());
return *it->second;
}
if ( segmentName == "__OBJC_CONST" ) {
if ( sectionName == "__cfstring" ) {
return cfStrings;
}
}
assert(false);
}
const char* CacheBuilder::CacheCoalescedText::SupportedSections[] = {
"__objc_classname",
"__objc_methname",
"__objc_methtype",
};
void CacheBuilder::CacheCoalescedText::
parseCoalescableText(const dyld3::MachOAnalyzer* ma,
DylibTextCoalescer& textCoalescer,
const IMPCaches::SelectorMap& selectors,
IMPCaches::HoleMap& selectorsHoleMap) {
static const bool log = false;
uint32_t splitSegSize = 0;
const void* splitSegStart = ma->getSplitSeg(splitSegSize);
if (!splitSegStart)
return;
if ((*(const uint8_t*)splitSegStart) != DYLD_CACHE_ADJ_V2_FORMAT)
return;
__block std::vector<std::pair<std::string, dyld3::MachOAnalyzer::SectionInfo>> textSectionInfos;
ma->forEachSection(^(const dyld3::MachOAnalyzer::SectionInfo §Info, bool malformedSectionRange, bool &stop) {
if (strcmp(sectInfo.segInfo.segName, "__TEXT") != 0)
return;
assert(!malformedSectionRange);
textSectionInfos.push_back({ sectInfo.sectName, sectInfo });
});
const std::set<std::string_view> supportedSections(std::begin(SupportedSections), std::end(SupportedSections));
int64_t slide = ma->getSlide();
bool isSelectorsSection = false;
for (auto sectionInfoIt = textSectionInfos.rbegin(); sectionInfoIt != textSectionInfos.rend(); ++sectionInfoIt) {
const std::string& sectionName = sectionInfoIt->first;
const dyld3::MachOAnalyzer::SectionInfo& sectInfo = sectionInfoIt->second;
isSelectorsSection = (sectionName == "__objc_methname");
if (supportedSections.find(sectionName) == supportedSections.end())
break;
StringSection& cacheStringSection = getSectionData(sectionName);
DylibTextCoalescer::DylibSectionOffsetToCacheSectionOffset& sectionStringData = textCoalescer.getSectionCoalescer("__TEXT", sectionName);
const uint8_t* content = (uint8_t*)(sectInfo.sectAddr + slide);
const char* s = (char*)content;
const char* end = s + sectInfo.sectSize;
while ( s < end ) {
std::string_view str = s;
int cacheSectionOffset = 0;
auto it = cacheStringSection.stringsToOffsets.find(str);
if (it != cacheStringSection.stringsToOffsets.end()) {
cacheStringSection.savedSpace += str.size() + 1;
cacheSectionOffset = it->second;
} else if (isSelectorsSection) {
#if BUILDING_APP_CACHE_UTIL
cacheSectionOffset = cacheStringSection.bufferSize;
#else
const IMPCaches::SelectorMap::UnderlyingMap & map = selectors.map;
IMPCaches::SelectorMap::UnderlyingMap::const_iterator selectorsIterator = map.find(str);
if (selectorsIterator != map.end()) {
cacheSectionOffset = selectorsIterator->second->offset;
} else {
cacheSectionOffset = selectorsHoleMap.addStringOfSize((unsigned)str.size() + 1);
}
#endif
cacheStringSection.stringsToOffsets[str] = cacheSectionOffset;
uint32_t sizeAtLeast = cacheSectionOffset + (uint32_t)str.size() + 1;
if (cacheStringSection.bufferSize < sizeAtLeast) {
cacheStringSection.bufferSize = sizeAtLeast;
}
} else {
auto itAndInserted = cacheStringSection.stringsToOffsets.insert({ str, cacheStringSection.bufferSize });
cacheSectionOffset = itAndInserted.first->second;
assert(itAndInserted.second);
cacheStringSection.bufferSize += str.size() + 1;
if (log) {
printf("Selector: %s -> %s\n", ma->installName(), s);
}
}
uint32_t sourceSectionOffset = (uint32_t)((uint64_t)s - (uint64_t)content);
sectionStringData[sourceSectionOffset] = cacheSectionOffset;
s += str.size() + 1;
}
}
}
void CacheBuilder::CacheCoalescedText::parseCFConstants(const dyld3::MachOAnalyzer *ma,
DylibTextCoalescer &textCoalescer) {
static const bool log = false;
if ( ma != nullptr )
return;
if ( !ma->is64() )
return;
if ( !ma->hasChainedFixupsLoadCommand() )
return;
const uint16_t pointerFormat = ma->chainedPointerFormat();
if ( pointerFormat != DYLD_CHAINED_PTR_ARM64E )
return;
if ( !ma->isSplitSegV2() )
return;
__block std::vector<std::pair<std::string, dyld3::MachOAnalyzer::SectionInfo>> dataSectionInfos;
__block uint64_t cstringStartVMAddr = 0;
__block uint64_t cstringEndVMAddr = 0;
ma->forEachSection(^(const dyld3::MachOAnalyzer::SectionInfo §Info, bool malformedSectionRange, bool &stop) {
if ( malformedSectionRange )
return;
if ( strcmp(sectInfo.segInfo.segName, "__OBJC_CONST") == 0 ) {
dataSectionInfos.push_back({ sectInfo.sectName, sectInfo });
return;
}
if ( strcmp(sectInfo.segInfo.segName, "__TEXT") == 0 ) {
if ( strcmp(sectInfo.sectName, "__cstring") == 0 ) {
if ( ( (sectInfo.sectFlags & SECTION_TYPE) == S_CSTRING_LITERALS ) ) {
cstringStartVMAddr = sectInfo.sectAddr;
cstringEndVMAddr = cstringStartVMAddr + sectInfo.sectSize;
}
}
}
});
if ( dataSectionInfos.size() != 1 )
return;
if ( dataSectionInfos.front().first != "__cfstring" )
return;
if ( cstringStartVMAddr == 0 )
return;
const dyld3::MachOAnalyzer::SectionInfo& cfStringsSection = dataSectionInfos.back().second;
const uint64_t cstringDataOffset = 16;
const char* className = cfStrings.isaClassName;
if ( cfStringsSection.sectSize % (uint32_t)DyldSharedCache::ConstantClasses::cfStringAtomSize ) {
return;
}
uint64_t baseAddress = ma->preferredLoadAddress();
uint64_t startVMOffset = cfStringsSection.sectAddr - baseAddress;
uint64_t endVMOffset = startVMOffset + cfStringsSection.sectSize;
__block Diagnostics diag;
__block bool hasSymbols = false;
ma->forEachGlobalSymbol(diag, ^(const char *symbolName, uint64_t n_value, uint8_t n_type, uint8_t n_sect, uint16_t n_desc, bool &stop) {
uint64_t vmOffset = n_value - baseAddress;
if ( vmOffset < startVMOffset )
return;
if ( vmOffset >= endVMOffset )
return;
hasSymbols = true;
stop = true;
});
if ( diag.hasError() )
return;
if ( hasSymbols )
return;
ma->forEachLocalSymbol(diag, ^(const char *symbolName, uint64_t n_value, uint8_t n_type, uint8_t n_sect, uint16_t n_desc, bool &stop) {
uint64_t vmOffset = n_value - baseAddress;
if ( vmOffset < startVMOffset )
return;
if ( vmOffset >= endVMOffset )
return;
hasSymbols = true;
stop = true;
});
if ( diag.hasError() )
return;
if ( hasSymbols )
return;
ma->forEachExportedSymbol(diag, ^(const char *symbolName, uint64_t imageOffset, uint64_t flags, uint64_t other, const char *importName, bool &stop) {
if ( imageOffset < startVMOffset )
return;
if ( imageOffset >= endVMOffset )
return;
hasSymbols = true;
stop = true;
});
if ( diag.hasError() )
return;
if ( hasSymbols )
return;
__block std::vector<const char*> dependentPaths;
ma->forEachDependentDylib(^(const char *loadPath, bool isWeak, bool isReExport,
bool isUpward, uint32_t compatVersion, uint32_t curVersion, bool &stop) {
dependentPaths.push_back(loadPath);
});
__block std::vector<uint64_t> atomOffsets;
bool dylibExportsISA = strcmp(ma->installName(), cfStrings.isaInstallName) == 0;
if ( !dylibExportsISA ) {
__block std::vector<std::pair<const char*, int>> bindTargetSymbols;
ma->forEachChainedFixupTarget(diag, ^(int libraryOrdinal, const char* symbolName, uint64_t addend, bool weakImport, bool& stop) {
bindTargetSymbols.push_back({ symbolName, libraryOrdinal });
});
__block bool foundBadBind = false;
ma->withChainStarts(diag, ma->chainStartsOffset(), ^(const dyld_chained_starts_in_image* startsInfo) {
if ( foundBadBind )
return;
ma->forEachFixupInAllChains(diag, startsInfo, false, ^(dyld3::MachOLoaded::ChainedFixupPointerOnDisk* fixupLoc,
const dyld_chained_starts_in_segment* segInfo, bool& stopFixups) {
uint64_t vmOffset = (uint8_t*)fixupLoc - (uint8_t*)ma;
if ( vmOffset < startVMOffset )
return;
if ( vmOffset >= endVMOffset )
return;
uint32_t bindOrdinal;
int64_t ptrAddend;
if ( fixupLoc->isBind(pointerFormat, bindOrdinal, ptrAddend) ) {
if ( ptrAddend != 0 ) {
foundBadBind = true;
stopFixups = true;
return;
}
if ( bindOrdinal >= bindTargetSymbols.size() ) {
foundBadBind = true;
stopFixups = true;
return;
}
if ( strcmp(bindTargetSymbols[bindOrdinal].first, className) != 0 ) {
foundBadBind = true;
stopFixups = true;
return;
}
int libOrdinal = bindTargetSymbols[bindOrdinal].second;
if ( libOrdinal <= 0 ) {
foundBadBind = true;
stopFixups = true;
return;
}
int depIndex = libOrdinal - 1;
if ( depIndex >= dependentPaths.size() ) {
foundBadBind = true;
stopFixups = true;
return;
}
const char* depLoadPath = dependentPaths[depIndex];
if ( strcmp(cfStrings.isaInstallName, depLoadPath) != 0 ) {
foundBadBind = true;
stopFixups = true;
return;
}
atomOffsets.push_back(vmOffset);
}
});
});
if ( foundBadBind )
return;
if ( atomOffsets.empty() )
return;
}
if ( diag.hasError() )
return;
__block std::map<uint64_t, uint64_t> sectionRebases;
ma->withChainStarts(diag, ma->chainStartsOffset(), ^(const dyld_chained_starts_in_image* startsInfo) {
ma->forEachFixupInAllChains(diag, startsInfo, false, ^(dyld3::MachOLoaded::ChainedFixupPointerOnDisk* fixupLoc, const dyld_chained_starts_in_segment* segInfo, bool& stopFixups) {
uint64_t vmOffset = (uint8_t*)fixupLoc - (uint8_t*)ma;
if ( vmOffset < startVMOffset )
return;
if ( vmOffset >= endVMOffset )
return;
uint64_t rebaseTargetRuntimeOffset;
if ( fixupLoc->isRebase(pointerFormat, 0, rebaseTargetRuntimeOffset) ) {
if ( dylibExportsISA && (rebaseTargetRuntimeOffset == cfStrings.isaVMOffset) ) {
atomOffsets.push_back(vmOffset);
} else {
sectionRebases[vmOffset] = rebaseTargetRuntimeOffset;
}
}
});
});
if ( diag.hasError() )
return;
if ( sectionRebases.size() != atomOffsets.size() )
return;
std::sort(atomOffsets.begin(), atomOffsets.end());
for (uint64_t atomOffset : atomOffsets) {
auto it = sectionRebases.find(atomOffset + cstringDataOffset);
if ( it == sectionRebases.end() )
return;
}
CFSection& stringSection = this->cfStrings;
DylibTextCoalescer::DylibSectionOffsetToCacheSectionOffset& sectionData = textCoalescer.getSectionCoalescer("__OBJC_CONST", "__cfstring");
for (uint64_t atomOffset : atomOffsets) {
if ( log )
printf("%s: found __cfstring at: 0x%llx\n", ma->installName(), atomOffset);
uint32_t sourceSectionOffset = (uint32_t)(atomOffset - startVMOffset);
uint32_t cacheSectionOffset = stringSection.bufferSize;
sectionData[sourceSectionOffset] = cacheSectionOffset;
stringSection.bufferSize += (uint32_t)DyldSharedCache::ConstantClasses::cfStringAtomSize;
}
}
void CacheBuilder::CacheCoalescedText::clear() {
*this = CacheBuilder::CacheCoalescedText();
}
CacheBuilder::CacheCoalescedText::StringSection& CacheBuilder::CacheCoalescedText::getSectionData(std::string_view sectionName) {
if (sectionName.size() > 16)
sectionName = sectionName.substr(0, 16);
std::map<std::string_view, StringSection*> supportedSections = {
{ "__objc_classname", &objcClassNames },
{ "__objc_methname", &objcMethNames },
{ "__objc_methtype", &objcMethTypes }
};
auto it = supportedSections.find(sectionName);
assert(it != supportedSections.end());
return *it->second;
}
const CacheBuilder::CacheCoalescedText::StringSection& CacheBuilder::CacheCoalescedText::getSectionData(std::string_view sectionName) const {
if (sectionName.size() > 16)
sectionName = sectionName.substr(0, 16);
std::map<std::string_view, const StringSection*> supportedSections = {
{ "__objc_classname", &objcClassNames },
{ "__objc_methname", &objcMethNames },
{ "__objc_methtype", &objcMethTypes }
};
auto it = supportedSections.find(sectionName);
assert(it != supportedSections.end());
return *it->second;
}
uint64_t CacheBuilder::CacheCoalescedText::getSectionVMAddr(std::string_view segmentName,
std::string_view sectionName) const {
if (segmentName.size() > 16)
segmentName = segmentName.substr(0, 16);
if (sectionName.size() > 16)
sectionName = sectionName.substr(0, 16);
if ( segmentName == "__TEXT" ) {
return getSectionData(sectionName).bufferVMAddr;
}
if ( segmentName == "__OBJC_CONST" ) {
if ( sectionName == "__cfstring" ) {
return cfStrings.bufferVMAddr;
}
}
assert(false);
}
uint8_t* CacheBuilder::CacheCoalescedText::getSectionBufferAddr(std::string_view segmentName,
std::string_view sectionName) const {
if (segmentName.size() > 16)
segmentName = segmentName.substr(0, 16);
if (sectionName.size() > 16)
sectionName = sectionName.substr(0, 16);
if ( segmentName == "__TEXT" ) {
return getSectionData(sectionName).bufferAddr;
}
if ( segmentName == "__OBJC_CONST" ) {
if ( sectionName == "__cfstring" ) {
return cfStrings.bufferAddr;
}
}
assert(false);
}
uint64_t CacheBuilder::CacheCoalescedText::getSectionObjcTag(std::string_view segmentName,
std::string_view sectionName) const {
if (segmentName.size() > 16)
segmentName = segmentName.substr(0, 16);
if (sectionName.size() > 16)
sectionName = sectionName.substr(0, 16);
if ( segmentName == "__TEXT" ) {
return 0;
}
if ( segmentName == "__OBJC_CONST" ) {
if ( sectionName == "__cfstring" ) {
return 0;
}
}
assert(false);
}