Loading...
--- dyld/dyld-750.5/dyld3/Loading.cpp
+++ dyld/dyld-832.7.3/dyld3/Loading.cpp
@@ -46,14 +46,17 @@
//#include <dispatch/dispatch.h>
#include <mach/vm_page_size.h>
+#include "ClosureFileSystemPhysical.h"
#include "MachOFile.h"
#include "MachOLoaded.h"
#include "MachOAnalyzer.h"
#include "Logging.h"
#include "Loading.h"
+#include "RootsChecker.h"
#include "Tracing.h"
#include "dyld2.h"
#include "dyld_cache_format.h"
+#include "libdyldEntryVector.h"
#include "objc-shared-cache.h"
@@ -103,11 +106,15 @@
Loader::Loader(const Array<LoadedImage>& existingImages, Array<LoadedImage>& newImagesStorage,
const void* cacheAddress, const Array<const dyld3::closure::ImageArray*>& imagesArrays,
const closure::ObjCSelectorOpt* selOpt, const Array<closure::Image::ObjCSelectorImage>& selImages,
- LogFunc logLoads, LogFunc logSegments, LogFunc logFixups, LogFunc logDofs)
+ const RootsChecker& rootsChecker, dyld3::Platform platform,
+ LogFunc logLoads, LogFunc logSegments, LogFunc logFixups, LogFunc logDof,
+ bool allowMissingLazies, dyld3::LaunchErrorInfo* launchErrorInfo)
: _existingImages(existingImages), _newImages(newImagesStorage),
_imagesArrays(imagesArrays), _dyldCacheAddress(cacheAddress), _dyldCacheSelectorOpt(nullptr),
_closureSelectorOpt(selOpt), _closureSelectorImages(selImages),
- _logLoads(logLoads), _logSegments(logSegments), _logFixups(logFixups), _logDofs(logDofs)
+ _rootsChecker(rootsChecker), _allowMissingLazies(allowMissingLazies), _platform(platform),
+ _logLoads(logLoads), _logSegments(logSegments), _logFixups(logFixups), _logDofs(logDof), _launchErrorInfo(launchErrorInfo)
+
{
#if BUILDING_DYLD
// This is only needed for dyld and the launch closure, not the dlopen closures
@@ -122,7 +129,7 @@
_newImages.push_back(li);
}
-LoadedImage* Loader::findImage(closure::ImageNum targetImageNum)
+LoadedImage* Loader::findImage(closure::ImageNum targetImageNum) const
{
#if BUILDING_DYLD
// The launch images are different in dyld vs libdyld. In dyld, the new images are
@@ -131,7 +138,7 @@
return info;
}
- for (uint64_t index = 0; index != _newImages.count(); ++index) {
+ for (uintptr_t index = 0; index != _newImages.count(); ++index) {
LoadedImage& info = _newImages[index];
if ( info.image()->representsImageNum(targetImageNum) ) {
// Try cache this entry for next time
@@ -180,11 +187,16 @@
void Loader::completeAllDependents(Diagnostics& diag, bool& someCacheImageOverridden)
{
- // accumulate all image overrides
- STACK_ALLOC_ARRAY(ImageOverride, overrides, _existingImages.maxCount() + _newImages.maxCount());
+ bool iOSonMac = (_platform == Platform::iOSMac);
+#if (TARGET_OS_OSX && TARGET_CPU_ARM64)
+ if ( _platform == Platform::iOS )
+ iOSonMac = true;
+#endif
+ // accumulate all image overrides (512 is placeholder for max unzippered twins in dyld cache)
+ STACK_ALLOC_ARRAY(ImageOverride, overrides, _existingImages.maxCount() + _newImages.maxCount() + 512);
for (const auto anArray : _imagesArrays) {
- // ignore prebuilt Image* in dyld cache
- if ( anArray->startImageNum() < dyld3::closure::kFirstLaunchClosureImageNum )
+ // ignore prebuilt Image* in dyld cache, except for MacCatalyst apps where unzipped twins can override each other
+ if ( (anArray->startImageNum() < dyld3::closure::kFirstLaunchClosureImageNum) && !iOSonMac )
continue;
anArray->forEachImage(^(const dyld3::closure::Image* image, bool& stop) {
ImageOverride overrideEntry;
@@ -207,7 +219,7 @@
uintptr_t index = 0;
while ( (index < _newImages.count()) && diag.noError() ) {
const closure::Image* image = _newImages[index].image();
- //fprintf(stderr, "completeAllDependents(): looking at dependents of %s\n", image->path());
+ //dyld::log("completeAllDependents(): looking at dependents of %s\n", image->path());
image->forEachDependentImage(^(uint32_t depIndex, closure::Image::LinkKind kind, closure::ImageNum depImageNum, bool& stop) {
// check if imageNum needs to be changed to an override
for (const ImageOverride& entry : overrides) {
@@ -221,7 +233,7 @@
// if not, look in imagesArrays
const closure::Image* depImage = closure::ImageArray::findImage(_imagesArrays, depImageNum);
if ( depImage != nullptr ) {
- //dyld::log(" load imageNum=0x%05X, image path=%s\n", depImageNum, depImage->path());
+ //dyld::log(" load imageNum=0x%05X, image path=%s\n", depImageNum, depImage->path());
if ( _newImages.freeCount() == 0 ) {
diag.error("too many initial images");
stop = true;
@@ -241,8 +253,11 @@
}
}
-void Loader::mapAndFixupAllImages(Diagnostics& diag, bool processDOFs, bool fromOFI)
-{
+void Loader::mapAndFixupAllImages(Diagnostics& diag, bool processDOFs, bool fromOFI, bool* closureOutOfDate, bool* recoverable)
+{
+ *closureOutOfDate = false;
+ *recoverable = true;
+
// scan array and map images not already loaded
for (LoadedImage& info : _newImages) {
if ( info.loadedAddress() != nullptr ) {
@@ -267,21 +282,21 @@
if ( info.image()->inDyldCache() ) {
if ( info.image()->overridableDylib() ) {
struct stat statBuf;
- if ( stat(info.image()->path(), &statBuf) == 0 ) {
- // verify file has not changed since closure was built
- uint64_t inode;
- uint64_t mtime;
- if ( info.image()->hasFileModTimeAndInode(inode, mtime) ) {
- if ( (statBuf.st_mtime != mtime) || (statBuf.st_ino != inode) ) {
+ if ( dyld3::stat(info.image()->path(), &statBuf) == 0 ) {
+ dyld3::closure::FileSystemPhysical fileSystem;
+ if ( _rootsChecker.onDiskFileIsRoot(info.image()->path(), (const DyldSharedCache*)_dyldCacheAddress, info.image(),
+ &fileSystem, statBuf.st_ino, statBuf.st_mtime) ) {
+ if ( ((const DyldSharedCache*)_dyldCacheAddress)->header.dylibsExpectedOnDisk ) {
diag.error("dylib file mtime/inode changed since closure was built for '%s'", info.image()->path());
+ } else {
+ diag.error("dylib file not expected on disk, must be a root '%s'", info.image()->path());
}
- }
- else {
- diag.error("dylib file not expected on disk, must be a root '%s'", info.image()->path());
+ *closureOutOfDate = true;
}
}
else if ( (_dyldCacheAddress != nullptr) && ((dyld_cache_header*)_dyldCacheAddress)->dylibsExpectedOnDisk ) {
diag.error("dylib file missing, was in dyld shared cache '%s'", info.image()->path());
+ *closureOutOfDate = true;
}
}
if ( diag.noError() ) {
@@ -297,28 +312,28 @@
}
}
else {
- mapImage(diag, info, fromOFI);
+ mapImage(diag, info, fromOFI, closureOutOfDate);
if ( diag.hasError() )
break; // out of for loop
}
}
- if ( diag.hasError() ) {
- // bummer, need to clean up by unmapping any images just mapped
- for (LoadedImage& info : _newImages) {
- if ( (info.state() == LoadedImage::State::mapped) && !info.image()->inDyldCache() && !info.leaveMapped() ) {
- _logSegments("dyld: unmapping %s\n", info.image()->path());
- unmapImage(info);
- }
- }
+ if ( diag.hasError() ) {
+ // need to clean up by unmapping any images just mapped
+ unmapAllImages();
return;
}
- // apply fixups
+ // apply fixups to all but main executable
+ LoadedImage* mainInfo = nullptr;
for (LoadedImage& info : _newImages) {
// images in shared cache do not need fixups applied
if ( info.image()->inDyldCache() )
continue;
+ if ( info.loadedAddress()->filetype == MH_EXECUTE ) {
+ mainInfo = &info;
+ continue;
+ }
// previously loaded images were previously fixed up
if ( info.state() < LoadedImage::State::fixedUp ) {
applyFixupsToImage(diag, info);
@@ -326,6 +341,26 @@
break;
info.setState(LoadedImage::State::fixedUp);
}
+ }
+ if ( diag.hasError() ) {
+ // need to clean up by unmapping any images just mapped
+ unmapAllImages();
+ return;
+ }
+
+ if ( mainInfo != nullptr ) {
+ // now apply fixups to main executable
+ // we do it in this order so that if there is a problem with the dylibs in the closure
+ // the main executable is left untouched so the closure can be rebuilt
+ applyFixupsToImage(diag, *mainInfo);
+ if ( diag.hasError() ) {
+ // need to clean up by unmapping any images just mapped
+ unmapAllImages();
+ // we have already started fixing up the main executable, so we cannot retry the launch again
+ *recoverable = false;
+ return;
+ }
+ mainInfo->setState(LoadedImage::State::fixedUp);
}
// find and register dtrace DOFs
@@ -344,6 +379,18 @@
}
}
+void Loader::unmapAllImages()
+{
+ for (LoadedImage& info : _newImages) {
+ if ( !info.image()->inDyldCache() && !info.leaveMapped() ) {
+ if ( (info.state() == LoadedImage::State::mapped) || (info.state() == LoadedImage::State::fixedUp) ) {
+ _logSegments("dyld: unmapping %s\n", info.image()->path());
+ unmapImage(info);
+ }
+ }
+ }
+}
+
bool Loader::sandboxBlocked(const char* path, const char* kind)
{
#if TARGET_OS_SIMULATOR || TARGET_OS_DRIVERKIT
@@ -370,7 +417,7 @@
return sandboxBlocked(path, "file-read-metadata");
}
-void Loader::mapImage(Diagnostics& diag, LoadedImage& info, bool fromOFI)
+void Loader::mapImage(Diagnostics& diag, LoadedImage& info, bool fromOFI, bool* closureOutOfDate)
{
dyld3::ScopedTimer timer(DBG_DYLD_TIMING_MAP_IMAGE, info.image()->path(), 0, 0);
@@ -382,11 +429,7 @@
bool isCodeSigned = image->hasCodeSignature(codeSignFileOffset, codeSignFileSize);
// open file
-#if BUILDING_DYLD
- int fd = dyld::my_open(info.image()->path(), O_RDONLY, 0);
-#else
- int fd = ::open(info.image()->path(), O_RDONLY, 0);
-#endif
+ int fd = dyld3::open(info.image()->path(), O_RDONLY, 0);
if ( fd == -1 ) {
int openErr = errno;
if ( (openErr == EPERM) && sandboxBlockedOpen(image->path()) )
@@ -399,7 +442,7 @@
// get file info
struct stat statBuf;
#if TARGET_OS_SIMULATOR
- if ( stat(image->path(), &statBuf) != 0 ) {
+ if ( dyld3::stat(image->path(), &statBuf) != 0 ) {
#else
if ( fstat(fd, &statBuf) != 0 ) {
#endif
@@ -418,6 +461,7 @@
if ( image->hasFileModTimeAndInode(inode, mtime) ) {
if ( (statBuf.st_mtime != mtime) || (statBuf.st_ino != inode) ) {
diag.error("file mtime/inode changed since closure was built for '%s'", image->path());
+ *closureOutOfDate = true;
close(fd);
return;
}
@@ -430,6 +474,23 @@
// file is now thin
sliceOffset = 0;
}
+ }
+ }
+
+ if ( isCodeSigned && (sliceOffset == 0) ) {
+ uint64_t expectedFileSize = round_page_kernel(codeSignFileOffset+codeSignFileSize);
+ uint64_t actualFileSize = round_page_kernel(statBuf.st_size);
+ if ( actualFileSize < expectedFileSize ) {
+ diag.error("File size too small for code signature");
+ *closureOutOfDate = true;
+ close(fd);
+ return;
+ }
+ if ( actualFileSize != expectedFileSize ) {
+ diag.error("File size doesn't match code signature");
+ *closureOutOfDate = true;
+ close(fd);
+ return;
}
}
@@ -447,6 +508,13 @@
if ( (errnoCopy == EPERM) || (errnoCopy == EBADEXEC) ) {
diag.error("code signature invalid (errno=%d) sliceOffset=0x%08llX, codeBlobOffset=0x%08X, codeBlobSize=0x%08X for '%s'",
errnoCopy, sliceOffset, codeSignFileOffset, codeSignFileSize, image->path());
+#if BUILDING_LIBDYLD
+ if ( errnoCopy == EBADEXEC ) {
+ // dlopen closures many be prebuilt in to the shared cache with a code signature, but the dylib is replaced
+ // with one without a code signature. In that case, lets build a new closure
+ *closureOutOfDate = true;
+ }
+#endif
}
else {
diag.error("fcntl(fd, F_ADDFILESIGS_RETURN) failed with errno=%d, sliceOffset=0x%08llX, codeBlobOffset=0x%08X, codeBlobSize=0x%08X for '%s'",
@@ -603,6 +671,7 @@
}
}
if ( diag.hasError() ) {
+ *closureOutOfDate = true;
::vm_deallocate(mach_task_self(), loadAddress, (vm_size_t)totalVMSize);
return;
}
@@ -610,7 +679,7 @@
#endif
-#if __IPHONE_OS_VERSION_MIN_REQUIRED && !TARGET_OS_SIMULATOR
+#if (__arm__ || __arm64__) && !TARGET_OS_SIMULATOR
// tell kernel about fairplay encrypted regions
uint32_t fpTextOffset;
uint32_t fpSize;
@@ -644,7 +713,7 @@
if ( dofs.empty() )
return;
- int fd = open("/dev/" DTRACEMNR_HELPER, O_RDWR);
+ int fd = ::open("/dev/" DTRACEMNR_HELPER, O_RDWR);
if ( fd < 0 ) {
_logDofs("can't open /dev/" DTRACEMNR_HELPER " to register dtrace DOF sections\n");
}
@@ -682,14 +751,18 @@
bool Loader::dtraceUserProbesEnabled()
{
+#if !TARGET_OS_SIMULATOR
uint8_t dofEnabled = *((uint8_t*)_COMM_PAGE_DTRACE_DOF_ENABLED);
return ( (dofEnabled & 1) );
+#else
+ return false;
+#endif
}
void Loader::vmAccountingSetSuspended(bool suspend, LogFunc logger)
{
-#if __arm__ || __arm64__
+#if TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR
// <rdar://problem/29099600> dyld should tell the kernel when it is doing fix-ups caused by roots
logger("vm.footprint_suspend=%d\n", suspend);
int newValue = suspend ? 1 : 0;
@@ -698,6 +771,21 @@
size_t oldlen = sizeof(oldValue);
sysctlbyname("vm.footprint_suspend", &oldValue, &oldlen, &newValue, newlen);
#endif
+}
+
+static const char* targetString(const MachOAnalyzerSet::FixupTarget& target)
+{
+ switch (target.kind ) {
+ case MachOAnalyzerSet::FixupTarget::Kind::rebase:
+ return "rebase";
+ case MachOAnalyzerSet::FixupTarget::Kind::bindAbsolute:
+ return "abolute";
+ case MachOAnalyzerSet::FixupTarget::Kind::bindToImage:
+ return target.foundSymbolName;
+ case MachOAnalyzerSet::FixupTarget::Kind::bindMissingSymbol:
+ return "missing";
+ }
+ return "";
}
void Loader::applyFixupsToImage(Diagnostics& diag, LoadedImage& info)
@@ -712,93 +800,186 @@
if ( overrideOfCache )
vmAccountingSetSuspended(true, _logFixups);
- image->forEachFixup(^(uint64_t imageOffsetToRebase, bool& stop) {
- // this is a rebase, add slide
- uintptr_t* fixUpLoc = (uintptr_t*)(imageLoadAddress + imageOffsetToRebase);
- *fixUpLoc += slide;
- _logFixups("dyld: fixup: %s:%p += %p\n", leafName, fixUpLoc, (void*)slide);
- },
- ^(uint64_t imageOffsetToBind, closure::Image::ResolvedSymbolTarget bindTarget, bool& stop) {
- // this is a bind, set to target
- uintptr_t* fixUpLoc = (uintptr_t*)(imageLoadAddress + imageOffsetToBind);
- uintptr_t value = resolveTarget(bindTarget);
- _logFixups("dyld: fixup: %s:%p = %p\n", leafName, fixUpLoc, (void*)value);
- *fixUpLoc = value;
- },
- ^(uint64_t imageOffsetToStartsInfo, const Array<closure::Image::ResolvedSymbolTarget>& targets, bool& stop) {
- // this is a chain of fixups, fix up all
- STACK_ALLOC_OVERFLOW_SAFE_ARRAY(const void*, targetAddrs, 128);
- targetAddrs.reserve(targets.count());
- for (uint32_t i=0; i < targets.count(); ++i)
- targetAddrs.push_back((void*)resolveTarget(targets[i]));
- ((dyld3::MachOAnalyzer*)(info.loadedAddress()))->withChainStarts(diag, imageOffsetToStartsInfo, ^(const dyld_chained_starts_in_image* starts) {
- info.loadedAddress()->fixupAllChainedFixups(diag, starts, slide, targetAddrs, ^(void* loc, void* newValue) {
- _logFixups("dyld: fixup: %s:%p = %p\n", leafName, loc, newValue);
+ if ( image->fixupsNotEncoded() ) {
+ WrappedMachO wmo((MachOAnalyzer*)info.loadedAddress(), this, (void*)info.image());
+ wmo.forEachFixup(diag,
+ ^(uint64_t fixupLocRuntimeOffset, PointerMetaData pmd, const FixupTarget& target, bool& stop) {
+ uintptr_t* fixUpLoc = (uintptr_t*)(imageLoadAddress + fixupLocRuntimeOffset);
+ uintptr_t value;
+ switch ( target.kind ) {
+ case MachOAnalyzerSet::FixupTarget::Kind::rebase:
+ case MachOAnalyzerSet::FixupTarget::Kind::bindToImage:
+ value = (uintptr_t)(target.foundInImage._mh) + target.offsetInImage;
+ break;
+ case MachOAnalyzerSet::FixupTarget::Kind::bindAbsolute:
+ value = (uintptr_t)target.offsetInImage;
+ break;
+ case MachOAnalyzerSet::FixupTarget::Kind::bindMissingSymbol:
+ if ( _launchErrorInfo ) {
+ _launchErrorInfo->kind = DYLD_EXIT_REASON_SYMBOL_MISSING;
+ _launchErrorInfo->clientOfDylibPath = info.image()->path();
+ _launchErrorInfo->targetDylibPath = target.foundInImage.path();
+ _launchErrorInfo->symbol = target.requestedSymbolName;
+ }
+ // we have no value to set, and forEachFixup() is about to finish
+ return;
+ }
+ #if __has_feature(ptrauth_calls)
+ if ( pmd.authenticated )
+ value = MachOLoaded::ChainedFixupPointerOnDisk::Arm64e::signPointer(value, fixUpLoc, pmd.usesAddrDiversity, pmd.diversity, pmd.key);
+ #endif
+ if ( pmd.high8 )
+ value |= ((uint64_t)pmd.high8 << 56);
+ _logFixups("dyld: fixup: %s:%p = %p (%s)\n", leafName, fixUpLoc, (void*)value, targetString(target));
+ *fixUpLoc = value;
+ },
+ ^(uint32_t cachedDylibIndex, uint32_t exportCacheOffset, const FixupTarget& target) {
+#if BUILDING_LIBDYLD && __x86_64__
+ // Full dlopen closures don't patch weak defs. Bail out early if we are libdyld to match this behaviour
+ return;
+#endif
+ ((const DyldSharedCache*)_dyldCacheAddress)->forEachPatchableUseOfExport(cachedDylibIndex, exportCacheOffset, ^(dyld_cache_patchable_location patchLoc) {
+ uintptr_t* loc = (uintptr_t*)(((uint8_t*)_dyldCacheAddress)+patchLoc.cacheOffset);
+ uintptr_t newImpl = (uintptr_t)(target.foundInImage._mh) + target.offsetInImage + DyldSharedCache::getAddend(patchLoc);
+ #if __has_feature(ptrauth_calls)
+ if ( patchLoc.authenticated )
+ newImpl = MachOLoaded::ChainedFixupPointerOnDisk::Arm64e::signPointer(newImpl, loc, patchLoc.usesAddressDiversity, patchLoc.discriminator, patchLoc.key);
+ #endif
+ // ignore duplicate patch entries
+ if ( *loc != newImpl ) {
+ _logFixups("dyld: cache patch: %p = 0x%0lX\n", loc, newImpl);
+ *loc = newImpl;
+ }
});
});
- },
- ^(uint64_t imageOffsetToFixup) {
- uintptr_t* fixUpLoc = (uintptr_t*)(imageLoadAddress + imageOffsetToFixup);
- _logFixups("dyld: fixup objc image info: %s Setting objc image info for precomputed objc\n", leafName);
-
- MachOAnalyzer::ObjCImageInfo *imageInfo = (MachOAnalyzer::ObjCImageInfo *)fixUpLoc;
- ((MachOAnalyzer::ObjCImageInfo *)imageInfo)->flags |= MachOAnalyzer::ObjCImageInfo::dyldPreoptimized;
- },
- ^(uint64_t imageOffsetToBind, closure::Image::ResolvedSymbolTarget bindTarget, bool& stop) {
- // this is a bind, set to target
- uintptr_t* fixUpLoc = (uintptr_t*)(imageLoadAddress + imageOffsetToBind);
- uintptr_t value = resolveTarget(bindTarget);
- _logFixups("dyld: fixup objc protocol: %s:%p = %p\n", leafName, fixUpLoc, (void*)value);
- *fixUpLoc = value;
- },
- ^(uint64_t imageOffsetToFixup, uint32_t selectorIndex, bool inSharedCache, bool &stop) {
- // fixupObjCSelRefs
- closure::Image::ResolvedSymbolTarget fixupTarget;
- if ( inSharedCache ) {
- const char* selectorString = _dyldCacheSelectorOpt->getEntryForIndex(selectorIndex);
- fixupTarget.sharedCache.kind = closure::Image::ResolvedSymbolTarget::kindSharedCache;
- fixupTarget.sharedCache.offset = (uint64_t)selectorString - (uint64_t)_dyldCacheAddress;
- } else {
- closure::ImageNum imageNum;
- uint64_t vmOffset;
- bool gotLocation = _closureSelectorOpt->getStringLocation(selectorIndex, _closureSelectorImages, imageNum, vmOffset);
- assert(gotLocation);
- fixupTarget.image.kind = closure::Image::ResolvedSymbolTarget::kindImage;
- fixupTarget.image.imageNum = imageNum;
- fixupTarget.image.offset = vmOffset;
- }
-
- uintptr_t* fixUpLoc = (uintptr_t*)(imageLoadAddress + imageOffsetToFixup);
- uintptr_t value = resolveTarget(fixupTarget);
- _logFixups("dyld: fixup objc selector: %s:%p(was '%s') = %p(now '%s')\n", leafName, fixUpLoc, (const char*)*fixUpLoc, (void*)value, (const char*)value);
- *fixUpLoc = value;
- }, ^(uint64_t imageOffsetToFixup, bool &stop) {
- // fixupObjCStableSwift
- // Class really is stable Swift, pretending to be pre-stable.
- // Fix its lie.
- uintptr_t* fixUpLoc = (uintptr_t*)(imageLoadAddress + imageOffsetToFixup);
- uintptr_t value = ((*fixUpLoc) | MachOAnalyzer::ObjCClassInfo::FAST_IS_SWIFT_STABLE) & ~MachOAnalyzer::ObjCClassInfo::FAST_IS_SWIFT_LEGACY;
- _logFixups("dyld: fixup objc stable Swift: %s:%p = %p\n", leafName, fixUpLoc, (void*)value);
- *fixUpLoc = value;
- }, ^(uint64_t imageOffsetToFixup, bool &stop) {
- // TODO: Implement this
- });
+#if BUILDING_LIBDYLD && TARGET_OS_OSX
+ // <rdar://problem/59265987> support old licenseware plugins on macOS using minimal closures
+ __block bool oldBinary = true;
+ info.loadedAddress()->forEachSupportedPlatform(^(Platform platform, uint32_t minOS, uint32_t sdk) {
+ if ( (platform == Platform::macOS) && (sdk >= 0x000A0F00) )
+ oldBinary = false;
+ });
+ if ( oldBinary ) {
+ // look for __DATA,__dyld section
+ info.loadedAddress()->forEachSection(^(const MachOAnalyzer::SectionInfo& sectInfo, bool malformedSectionRange, bool& stop) {
+ if ( (strcmp(sectInfo.sectName, "__dyld") == 0) && (strcmp(sectInfo.segInfo.segName, "__DATA") == 0) ) {
+ // dyld_func_lookup is second pointer in __dyld section
+ uintptr_t* dyldSection = (uintptr_t*)(sectInfo.sectAddr + (uintptr_t)info.loadedAddress());
+ _logFixups("dyld: __dyld section: %p = %p\n", &dyldSection[1], &dyld3::compatFuncLookup);
+ dyldSection[1] = (uintptr_t)&dyld3::compatFuncLookup;
+ }
+ });
+ }
+#endif
+ }
+ else {
+ if ( image->rebasesNotEncoded() ) {
+ // <rdar://problem/56172089> some apps have so many rebases the closure file is too big, instead we go back to rebase opcodes
+ ((MachOAnalyzer*)imageLoadAddress)->forEachRebase(diag, true, ^(uint64_t imageOffsetToRebase, bool& stop) {
+ // this is a rebase, add slide
+ uintptr_t* fixUpLoc = (uintptr_t*)(imageLoadAddress + imageOffsetToRebase);
+ *fixUpLoc += slide;
+ _logFixups("dyld: fixup: %s:%p += %p\n", leafName, fixUpLoc, (void*)slide);
+ });
+ }
+ image->forEachFixup(^(uint64_t imageOffsetToRebase, bool& stop) {
+ // this is a rebase, add slide
+ uintptr_t* fixUpLoc = (uintptr_t*)(imageLoadAddress + imageOffsetToRebase);
+ *fixUpLoc += slide;
+ _logFixups("dyld: fixup: %s:%p += %p\n", leafName, fixUpLoc, (void*)slide);
+ },
+ ^(uint64_t imageOffsetToBind, closure::Image::ResolvedSymbolTarget bindTarget, bool& stop) {
+ // this is a bind, set to target
+ uintptr_t* fixUpLoc = (uintptr_t*)(imageLoadAddress + imageOffsetToBind);
+ uintptr_t value = resolveTarget(bindTarget);
+ _logFixups("dyld: fixup: %s:%p = %p\n", leafName, fixUpLoc, (void*)value);
+ *fixUpLoc = value;
+ },
+ ^(uint64_t imageOffsetToStartsInfo, const Array<closure::Image::ResolvedSymbolTarget>& targets, bool& stop) {
+ // this is a chain of fixups, fix up all
+ STACK_ALLOC_OVERFLOW_SAFE_ARRAY(const void*, targetAddrs, 128);
+ targetAddrs.reserve(targets.count());
+ for (uint32_t i=0; i < targets.count(); ++i)
+ targetAddrs.push_back((void*)resolveTarget(targets[i]));
+ ((dyld3::MachOAnalyzer*)(info.loadedAddress()))->withChainStarts(diag, imageOffsetToStartsInfo, ^(const dyld_chained_starts_in_image* starts) {
+ info.loadedAddress()->fixupAllChainedFixups(diag, starts, slide, targetAddrs, ^(void* loc, void* newValue) {
+ _logFixups("dyld: fixup: %s:%p = %p\n", leafName, loc, newValue);
+ });
+ });
+ },
+ ^(uint64_t imageOffsetToFixup) {
+ uintptr_t* fixUpLoc = (uintptr_t*)(imageLoadAddress + imageOffsetToFixup);
+ _logFixups("dyld: fixup objc image info: %s Setting objc image info for precomputed objc\n", leafName);
+
+ MachOAnalyzer::ObjCImageInfo *imageInfo = (MachOAnalyzer::ObjCImageInfo *)fixUpLoc;
+ ((MachOAnalyzer::ObjCImageInfo *)imageInfo)->flags |= MachOAnalyzer::ObjCImageInfo::dyldPreoptimized;
+ },
+ ^(uint64_t imageOffsetToBind, closure::Image::ResolvedSymbolTarget bindTarget, bool& stop) {
+ // this is a bind, set to target
+ uintptr_t* fixUpLoc = (uintptr_t*)(imageLoadAddress + imageOffsetToBind);
+ uintptr_t value = resolveTarget(bindTarget);
+#if __has_feature(ptrauth_calls)
+ // Sign the ISA on arm64e.
+ // Unfortunately a hard coded value here is not ideal, but this is ABI so we aren't going to change it
+ // This matches the value in libobjc __objc_opt_ptrs: .quad x@AUTH(da, 27361, addr)
+ value = MachOLoaded::ChainedFixupPointerOnDisk::Arm64e::signPointer(value, fixUpLoc, true, 27361, 2);
+#endif
+ _logFixups("dyld: fixup objc protocol: %s:%p = %p\n", leafName, fixUpLoc, (void*)value);
+ *fixUpLoc = value;
+ },
+ ^(uint64_t imageOffsetToFixup, uint32_t selectorIndex, bool inSharedCache, bool &stop) {
+ // fixupObjCSelRefs
+ closure::Image::ResolvedSymbolTarget fixupTarget;
+ if ( inSharedCache ) {
+ const char* selectorString = _dyldCacheSelectorOpt->getEntryForIndex(selectorIndex);
+ fixupTarget.sharedCache.kind = closure::Image::ResolvedSymbolTarget::kindSharedCache;
+ fixupTarget.sharedCache.offset = (uint64_t)selectorString - (uint64_t)_dyldCacheAddress;
+ } else {
+ closure::ImageNum imageNum;
+ uint64_t vmOffset;
+ bool gotLocation = _closureSelectorOpt->getStringLocation(selectorIndex, _closureSelectorImages, imageNum, vmOffset);
+ assert(gotLocation);
+ fixupTarget.image.kind = closure::Image::ResolvedSymbolTarget::kindImage;
+ fixupTarget.image.imageNum = imageNum;
+ fixupTarget.image.offset = vmOffset;
+ }
+ uintptr_t* fixUpLoc = (uintptr_t*)(imageLoadAddress + imageOffsetToFixup);
+ uintptr_t value = resolveTarget(fixupTarget);
+ _logFixups("dyld: fixup objc selector: %s:%p(was '%s') = %p(now '%s')\n", leafName, fixUpLoc, (const char*)*fixUpLoc, (void*)value, (const char*)value);
+ *fixUpLoc = value;
+ }, ^(uint64_t imageOffsetToFixup, bool &stop) {
+ // fixupObjCStableSwift
+ // Class really is stable Swift, pretending to be pre-stable.
+ // Fix its lie.
+ uintptr_t* fixUpLoc = (uintptr_t*)(imageLoadAddress + imageOffsetToFixup);
+ uintptr_t value = ((*fixUpLoc) | MachOAnalyzer::ObjCClassInfo::FAST_IS_SWIFT_STABLE) & ~MachOAnalyzer::ObjCClassInfo::FAST_IS_SWIFT_LEGACY;
+ _logFixups("dyld: fixup objc stable Swift: %s:%p = %p\n", leafName, fixUpLoc, (void*)value);
+ *fixUpLoc = value;
+ }, ^(uint64_t imageOffsetToFixup, bool &stop) {
+ // fixupObjCMethodList
+ // Set the method list to have the uniqued bit set
+ uint32_t* fixUpLoc = (uint32_t*)(imageLoadAddress + imageOffsetToFixup);
+ uint32_t value = (*fixUpLoc) | MachOAnalyzer::ObjCMethodList::methodListIsUniqued;
+ _logFixups("dyld: fixup objc method list: %s:%p = 0x%08x\n", leafName, fixUpLoc, value);
+ *fixUpLoc = value;
+ });
#if __i386__
- __block bool segmentsMadeWritable = false;
- image->forEachTextReloc(^(uint32_t imageOffsetToRebase, bool& stop) {
- if ( !segmentsMadeWritable )
- setSegmentProtects(info, true);
- uintptr_t* fixUpLoc = (uintptr_t*)(imageLoadAddress + imageOffsetToRebase);
- *fixUpLoc += slide;
- _logFixups("dyld: fixup: %s:%p += %p\n", leafName, fixUpLoc, (void*)slide);
- },
- ^(uint32_t imageOffsetToBind, closure::Image::ResolvedSymbolTarget bindTarget, bool& stop) {
- // FIXME
- });
- if ( segmentsMadeWritable )
- setSegmentProtects(info, false);
-#endif
+ __block bool segmentsMadeWritable = false;
+ image->forEachTextReloc(^(uint32_t imageOffsetToRebase, bool& stop) {
+ if ( !segmentsMadeWritable )
+ setSegmentProtects(info, true);
+ uintptr_t* fixUpLoc = (uintptr_t*)(imageLoadAddress + imageOffsetToRebase);
+ *fixUpLoc += slide;
+ _logFixups("dyld: fixup: %s:%p += %p\n", leafName, fixUpLoc, (void*)slide);
+ },
+ ^(uint32_t imageOffsetToBind, closure::Image::ResolvedSymbolTarget bindTarget, bool& stop) {
+ // FIXME
+ });
+ if ( segmentsMadeWritable )
+ setSegmentProtects(info, false);
+#endif
+ }
// make any read-only data segments read-only
if ( image->hasReadOnlyData() && !image->inDyldCache() ) {
@@ -828,13 +1009,112 @@
}
#endif
+
+void Loader::forEachImage(void (^handler)(const LoadedImage& li, bool& stop)) const
+{
+ bool stop = false;
+ for (const LoadedImage& li : _existingImages) {
+ handler(li, stop);
+ if ( stop )
+ return;
+ }
+ for (const LoadedImage& li : _newImages) {
+ handler(li, stop);
+ if ( stop )
+ return;
+ }
+}
+
+void Loader::mas_forEachImage(void (^handler)(const WrappedMachO& wmo, bool hidden, bool& stop)) const
+{
+ forEachImage(^(const LoadedImage& li, bool& stop) {
+ WrappedMachO wmo((MachOAnalyzer*)li.loadedAddress(), this, (void*)li.image());
+ handler(wmo, li.hideFromFlatSearch(), stop);
+ });
+}
+
+
+bool Loader::wmo_missingSymbolResolver(const WrappedMachO* fromWmo, bool weakImport, bool lazyBind, const char* symbolName, const char* expectedInDylibPath, const char* clientPath, FixupTarget& target) const
+{
+ if ( weakImport ) {
+ target.offsetInImage = 0;
+ target.kind = FixupTarget::Kind::bindAbsolute;
+ return true;
+ }
+
+ if ( lazyBind && _allowMissingLazies ) {
+ __block bool result = false;
+ forEachImage(^(const LoadedImage& li, bool& stop) {
+ if ( li.loadedAddress()->isDylib() && (strcmp(li.loadedAddress()->installName(), "/usr/lib/system/libdyld.dylib") == 0) ) {
+ WrappedMachO libdyldWmo((MachOAnalyzer*)li.loadedAddress(), this, (void*)li.image());
+ Diagnostics diag;
+ if ( libdyldWmo.findSymbolIn(diag, "__dyld_missing_symbol_abort", 0, target) ) {
+ // <rdar://problem/44315944> closures should bind missing lazy-bind symbols to a missing symbol handler in libdyld in flat namespace
+ result = true;
+ }
+ stop = true;
+ }
+ });
+ return result;
+ }
+
+ // FIXME
+ return false;
+}
+
+
+void Loader::mas_mainExecutable(WrappedMachO& mainWmo) const
+{
+ forEachImage(^(const LoadedImage& li, bool& stop) {
+ if ( li.loadedAddress()->isMainExecutable() ) {
+ WrappedMachO wmo((MachOAnalyzer*)li.loadedAddress(), this, (void*)li.image());
+ mainWmo = wmo;
+ stop = true;
+ }
+ });
+}
+
+void* Loader::mas_dyldCache() const
+{
+ return (void*)_dyldCacheAddress;
+}
+
+
+bool Loader::wmo_dependent(const WrappedMachO* wmo, uint32_t depIndex, WrappedMachO& childWmo, bool& missingWeakDylib) const
+{
+ const closure::Image* image = (closure::Image*)(wmo->_other);
+ closure::ImageNum depImageNum = image->dependentImageNum(depIndex);
+ if ( depImageNum == closure::kMissingWeakLinkedImage ) {
+ missingWeakDylib = true;
+ return true;
+ }
+ else {
+ if ( LoadedImage* li = findImage(depImageNum) ) {
+ WrappedMachO foundWmo((MachOAnalyzer*)li->loadedAddress(), this, (void*)li->image());
+ missingWeakDylib = false;
+ childWmo = foundWmo;
+ return true;
+ }
+ }
+ return false;
+}
+
+
+const char* Loader::wmo_path(const WrappedMachO* wmo) const
+{
+ const closure::Image* image = (closure::Image*)(wmo->_other);
+ return image->path();
+}
+
+
+
#if BUILDING_DYLD
LoadedImage* Loader::LaunchImagesCache::findImage(closure::ImageNum imageNum,
Array<LoadedImage>& images) const {
if ( (imageNum < _firstImageNum) || (imageNum >= _lastImageNum) )
return nullptr;
- uint64_t cacheIndex = imageNum - _firstImageNum;
+ unsigned int cacheIndex = imageNum - _firstImageNum;
uint32_t imagesIndex = _imageIndices[cacheIndex];
if ( imagesIndex == 0 )
return nullptr;
@@ -843,16 +1123,17 @@
return &images[imagesIndex - 1];
}
-void Loader::LaunchImagesCache::tryAddImage(closure::ImageNum imageNum,
- uint64_t allImagesIndex) {
+void Loader::LaunchImagesCache::tryAddImage(closure::ImageNum imageNum, uint64_t allImagesIndex) const {
if ( (imageNum < _firstImageNum) || (imageNum >= _lastImageNum) )
return;
- uint64_t cacheIndex = imageNum - _firstImageNum;
+ unsigned int cacheIndex = imageNum - _firstImageNum;
// Note the index is offset by 1 so that 0's are not yet set
_imageIndices[cacheIndex] = (uint32_t)allImagesIndex + 1;
}
+ #endif
+
void forEachLineInFile(const char* buffer, size_t bufferLen, void (^lineHandler)(const char* line, bool& stop))
{
@@ -876,7 +1157,7 @@
void forEachLineInFile(const char* path, void (^lineHandler)(const char* line, bool& stop))
{
- int fd = dyld::my_open(path, O_RDONLY, 0);
+ int fd = dyld3::open(path, O_RDONLY, 0);
if ( fd != -1 ) {
struct stat statBuf;
if ( fstat(fd, &statBuf) == 0 ) {
@@ -890,14 +1171,13 @@
}
}
-#endif
#if (BUILDING_LIBDYLD || BUILDING_DYLD)
bool internalInstall()
{
#if TARGET_OS_SIMULATOR
return false;
-#elif __IPHONE_OS_VERSION_MIN_REQUIRED
+#elif TARGET_OS_IPHONE
uint32_t devFlags = *((uint32_t*)_COMM_PAGE_DEV_FIRM);
return ( (devFlags & 1) == 1 );
#else