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--- dyld/dyld-1340/libdyld/utils.cpp
+++ dyld/dyld-1122.1/libdyld/utils.cpp
@@ -26,51 +26,26 @@
#if !TARGET_OS_EXCLAVEKIT
#include <string.h>
-#include <unistd.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <mach-o/utils.h>
#include <mach-o/utils_priv.h>
#include <mach-o/dyld_priv.h>
-#include <TargetConditionals.h>
-
+
+#include "MachOFile.h"
#include "FileUtils.h"
#include "DyldDelegates.h"
-// mach_o
-#include "Architecture.h"
-#include "Error.h"
-#include "Fixup.h"
-#include "GradedArchitectures.h"
-#include "Header.h"
-#include "Image.h"
-#include "Symbol.h"
-#include "Universal.h"
-#include "Version32.h"
-
-
-using mach_o::Architecture;
-using mach_o::Error;
-using mach_o::Fixup;
-using mach_o::GradedArchitectures;
-using mach_o::Header;
-using mach_o::Image;
-using mach_o::LinkedDylibAttributes;
-using mach_o::Platform;
-using mach_o::Symbol;
-using mach_o::Universal;
-using mach_o::Version32;
-using mach_o::Version64;
-using mach_o::LinkedDylibAttributes;
-using mach_o::Fixup;
-using mach_o::Symbol;
-using mach_o::Platform;
-using mach_o::Architecture;
+using dyld3::MachOFile;
+using dyld3::FatFile;
+using dyld3::GradedArchs;
+using dyld3::Platform;
+
// used by unit tests
__attribute__((visibility("hidden")))
-int macho_best_slice_fd_internal(int fd, Platform platform, const GradedArchitectures& launchArchs, const GradedArchitectures& dylibArchs, bool isOSBinary,
+int macho_best_slice_fd_internal(int fd, Platform platform, const GradedArchs& launchArchs, const GradedArchs& dylibArchs, bool isOSBinary,
void (^bestSlice)(const struct mach_header* slice, uint64_t sliceOffset, size_t sliceSize));
@@ -80,24 +55,14 @@
bool macho_cpu_type_for_arch_name(const char* archName, cpu_type_t* type, cpu_subtype_t* subtype)
{
- Architecture arch = Architecture::byName(archName);
- if ( arch == Architecture::invalid )
- return false;
-
- *type = arch.cpuType();
- *subtype = arch.cpuSubtype();
-
- return true;
+ return MachOFile::cpuTypeFromArchName(archName, type, subtype);
}
const char* macho_arch_name_for_cpu_type(cpu_type_t type, cpu_subtype_t subtype)
{
- const char* result = Architecture(type, subtype).name();
+ const char* result = MachOFile::archName(type, subtype);
if ( strcmp(result, "unknown") == 0 )
return nullptr;
- // Strip any suffix that further specifies the exact arm64e type (.old, .kernel, etc).
- if ( std::string_view(result).starts_with("arm64e") )
- return "arm64e";
return result;
}
@@ -131,35 +96,28 @@
if ( ::fstat(fd, &statbuf) == -1 )
return errno;
- // when running as "root", calling open() on a file with no read-permissions actually succeeds, but we need it to fail
- if ( ((statbuf.st_mode & (S_IRUSR|S_IROTH)) == 0) && (geteuid() == 0) )
- return EACCES;
-
const void* mappedFile = ::mmap(nullptr, (size_t)statbuf.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
if ( mappedFile == MAP_FAILED )
return errno;
int result = 0;
- std::span<const uint8_t> content = {(uint8_t*)mappedFile, (size_t)statbuf.st_size};
- if ( const Universal* uni = Universal::isUniversal(content) ) {
- Error error = uni->valid(content.size());
- if ( error.hasError() )
- return EBADMACHO;
-
- uni->forEachSlice(^(Universal::Slice slice, bool &stop) {
- if ( callback ) {
- uint64_t fileOffset = slice.buffer.data() - content.data();
- callback((const mach_header*)slice.buffer.data(), fileOffset, slice.buffer.size(), &stop);
- }
+ Diagnostics diag;
+ if ( const FatFile* ff = FatFile::isFatFile(mappedFile) ) {
+ ff->forEachSlice(diag, statbuf.st_size, ^(uint32_t sliceCpuType, uint32_t sliceCpuSubType, const void* sliceStart, uint64_t sliceSize, bool& stop) {
+ size_t sliceOffset = (uint8_t*)sliceStart - (uint8_t*)mappedFile;
+ if ( callback )
+ callback((mach_header*)sliceStart, sliceOffset, (size_t)sliceSize, &stop);
});
- }
- else if ( const Header* hdr = Header::isMachO(content) ) {
+ if ( diag.hasError() )
+ result = EBADMACHO;
+ }
+ else if ( ((MachOFile*)mappedFile)->isMachO(diag, statbuf.st_size) ) {
bool stop;
if ( callback )
- callback((const mach_header*)hdr, 0, content.size(), &stop);
+ callback((mach_header*)mappedFile, 0, (size_t)statbuf.st_size, &stop);
}
else {
- // not a universal file nor a mach-o file
+ // not a fat file nor a mach-o file
result = EFTYPE;
}
@@ -180,18 +138,18 @@
return result;
}
-static bool launchableOnCurrentPlatform(const Header* hdr)
+static bool launchableOnCurrentPlatform(const MachOFile* mf)
{
#if TARGET_OS_OSX
// macOS is special and can launch macOS, catalyst, and iOS apps
- return ( hdr->builtForPlatform(Platform::macOS) || hdr->builtForPlatform(Platform::macCatalyst) || hdr->builtForPlatform(Platform::iOS) );
+ return ( mf->builtForPlatform(Platform::macOS) || mf->builtForPlatform(Platform::iOSMac) || mf->builtForPlatform(Platform::iOS) );
#else
- return hdr->builtForPlatform(Platform::current());
+ return mf->builtForPlatform(MachOFile::currentPlatform());
#endif
}
// use directly by unit tests
-int macho_best_slice_fd_internal(int fd, Platform platform, const GradedArchitectures& launchArchs, const GradedArchitectures& dylibArchs, bool isOSBinary,
+int macho_best_slice_fd_internal(int fd, Platform platform, const GradedArchs& launchArchs, const GradedArchs& dylibArchs, bool isOSBinary,
void (^ _Nullable bestSlice)(const struct mach_header* slice, uint64_t fileOffset, size_t sliceSize))
{
struct stat statbuf;
@@ -203,44 +161,52 @@
if ( mappedFile == MAP_FAILED )
return errno;
+ Diagnostics diag;
int result = 0;
- std::span<const uint8_t> content = {(uint8_t*)mappedFile, (size_t)statbuf.st_size};
- if ( const Universal* uni = Universal::isUniversal(content) ) {
- Error error = uni->valid(content.size());
- if ( error.hasError() )
+ if ( const FatFile* ff = FatFile::isFatFile(mappedFile) ) {
+ __block int bestGrade = 0;
+ __block uint64_t sliceOffset = 0;
+ __block uint64_t sliceLen = 0;
+ ff->forEachSlice(diag, statbuf.st_size, ^(uint32_t sliceCpuType, uint32_t sliceCpuSubType, const void* sliceStart, uint64_t sliceSize, bool& stop) {
+ if ( const MachOFile* mf = MachOFile::isMachO(sliceStart) ) {
+ if ( mf->filetype == MH_EXECUTE ) {
+ int sliceGrade = launchArchs.grade(mf->cputype, mf->cpusubtype, isOSBinary);
+ if ( (sliceGrade > bestGrade) && launchableOnCurrentPlatform(mf) ) {
+ sliceOffset = (char*)sliceStart - (char*)mappedFile;
+ sliceLen = sliceSize;
+ bestGrade = sliceGrade;
+ }
+ }
+ else {
+ int sliceGrade = dylibArchs.grade(mf->cputype, mf->cpusubtype, isOSBinary);
+ if ( (sliceGrade > bestGrade) && mf->loadableIntoProcess(platform, "") ) {
+ sliceOffset = (char*)sliceStart - (char*)mappedFile;
+ sliceLen = sliceSize;
+ bestGrade = sliceGrade;
+ }
+ }
+ }
+ });
+ if ( diag.hasError() )
return EBADMACHO;
-
- Universal::Slice launchSlice, dylibSlice;
- uni->bestSlice(launchArchs, isOSBinary, launchSlice);
- uni->bestSlice(dylibArchs, isOSBinary, dylibSlice);
- const Header* exe = Header::isMachO(launchSlice.buffer);
- const Header* dylib = Header::isMachO(dylibSlice.buffer);
- if ( exe && exe->isMainExecutable() ) {
- if ( bestSlice ) {
- uint64_t fileOffset = launchSlice.buffer.data() - content.data();
- bestSlice((const mach_header*)launchSlice.buffer.data(), fileOffset, launchSlice.buffer.size());
- }
- }
- else if ( dylib && !dylib->isMainExecutable() ) {
- if ( bestSlice ) {
- uint64_t fileOffset = dylibSlice.buffer.data() - content.data();
- bestSlice((const mach_header*)dylibSlice.buffer.data(), fileOffset, dylibSlice.buffer.size());
- }
+
+ if ( bestGrade != 0 ) {
+ if ( bestSlice )
+ bestSlice((MachOFile*)((char*)mappedFile + sliceOffset), (size_t)sliceOffset, (size_t)sliceLen);
}
else
result = EBADARCH;
}
- else if ( const Header* hdr = Header::isMachO(content) ) {
- if ( hdr->isMainExecutable()
- && (launchArchs.isCompatible(hdr->arch(), isOSBinary) != 0) && launchableOnCurrentPlatform(hdr) ) {
+ else if ( const MachOFile* mf = MachOFile::isMachO(mappedFile) ) {
+ if ( (mf->filetype == MH_EXECUTE) && (launchArchs.grade(mf->cputype, mf->cpusubtype, isOSBinary) != 0) && launchableOnCurrentPlatform(mf) ) {
// the "best" of a main executable must pass grading and be a launchable
if ( bestSlice )
- bestSlice((const mach_header*)hdr, 0, content.size());
- }
- else if ( (dylibArchs.isCompatible(hdr->arch(), isOSBinary) != 0) && hdr->loadableIntoProcess(platform, "") ) {
+ bestSlice(mf, 0, (size_t)statbuf.st_size);
+ }
+ else if ( (dylibArchs.grade(mf->cputype, mf->cpusubtype, isOSBinary) != 0) && mf->loadableIntoProcess(platform, "") ) {
// the "best" of a dylib/bundle must pass grading and match the platform of the current process
if ( bestSlice )
- bestSlice((const mach_header*)hdr, 0, content.size());
+ bestSlice(mf, 0, (size_t)statbuf.st_size);
}
else {
result = EBADARCH;
@@ -255,36 +221,19 @@
return result;
}
-#if __arm64e__
-static const void* stripPointer(const void* ptr)
-{
-#if __has_feature(ptrauth_calls)
- return __builtin_ptrauth_strip(ptr, ptrauth_key_asia);
-#else
- return ptr;
-#endif
-}
-#endif
int macho_best_slice_in_fd(int fd, void (^bestSlice)(const struct mach_header* slice, uint64_t sliceFileOffset, size_t sliceSize)__MACHO_NOESCAPE)
{
- bool keysOff = true;
-#if __arm64e__
- // Test if PAC is enabled
- const void* p = (const void*)&macho_best_slice;
- if ( stripPointer(p) != p )
- keysOff = false;
-#endif
- const Platform platform = Platform::current();
- const GradedArchitectures* launchArchs = &GradedArchitectures::currentLaunch();
- const GradedArchitectures& dylibArchs = GradedArchitectures::currentLoad(keysOff, false);
+ const Platform platform = MachOFile::currentPlatform();
+ const GradedArchs* launchArchs = &GradedArchs::forCurrentOS(false, false);
+ const GradedArchs* dylibArchs = &GradedArchs::forCurrentOS(false, false);
#if TARGET_OS_SIMULATOR
const char* simArchNames = getenv("SIMULATOR_ARCHS");
if ( simArchNames == nullptr )
simArchNames = "x86_64";
- launchArchs = &GradedArchitectures::currentLaunch(simArchNames);
+ launchArchs = &GradedArchs::launchCurrentOS(simArchNames);
#endif
- return macho_best_slice_fd_internal(fd, platform, *launchArchs, dylibArchs, false, bestSlice);
+ return macho_best_slice_fd_internal(fd, platform, *launchArchs, *dylibArchs, false, bestSlice);
}
@@ -294,308 +243,10 @@
///
const char* _Nullable macho_dylib_install_name(const struct mach_header* _Nonnull mh) DYLD_EXCLAVEKIT_UNAVAILABLE
{
- const Header* hdr = (const Header*)mh;
- if ( hdr->hasMachOMagic() )
- return hdr->installName();
+ if ( const MachOFile* mf = MachOFile::isMachO(mh) )
+ return mf->installName();
return nullptr;
}
-static void iterateDependencies(const Image& image, void (^_Nonnull callback)(const char* _Nonnull loadPath, const char* _Nonnull attributes, bool* _Nonnull stop) )
-{
- image.header()->forEachLinkedDylib(^(const char* loadPath, LinkedDylibAttributes kind, Version32 compatVersion, Version32 curVersion,
- bool synthesizedLink, bool& stop) {
- char attrBuf[64];
- kind.toString(attrBuf);
- callback(loadPath, attrBuf, &stop);
- });
-}
-
-int macho_for_each_dependent_dylib(const struct mach_header* _Nonnull mh, size_t mappedSize,
- void (^ _Nonnull callback)(const char* _Nonnull loadPath, const char* _Nonnull attributes, bool* _Nonnull stop))
-{
- if ( mappedSize == 0 ) {
- // Image loaded by dyld
- Image image(mh);
- iterateDependencies(image, callback);
- }
- else {
- // raw mach-o file/slice in memory
- Image image(mh, mappedSize, Image::MappingKind::wholeSliceMapped);
- if ( !image.header()->hasMachOMagic() )
- return EFTYPE;
- if ( Error err = image.validate() )
- return EBADMACHO;
- iterateDependencies(image, callback);
- }
- return 0;
-}
-
-static void iterateImportedSymbols(const Image& image, void (^_Nonnull callback)(const char* _Nonnull symbolName, const char* _Nonnull libraryPath, bool weakImport, bool* _Nonnull stop) )
-{
- if ( image.hasChainedFixups() ) {
- image.chainedFixups().forEachBindTarget(^(const Fixup::BindTarget& bindTarget, bool& stop) {
- callback(bindTarget.symbolName.c_str(), image.header()->libOrdinalName(bindTarget.libOrdinal).c_str(), bindTarget.weakImport, &stop);
- });
- }
- else {
- // old opcode based fixups
- if ( image.hasBindOpcodes() ) {
- image.bindOpcodes().forEachBindTarget(^(const Fixup::BindTarget& bindTarget, bool& stop) {
- callback(bindTarget.symbolName.c_str(), image.header()->libOrdinalName(bindTarget.libOrdinal).c_str(), bindTarget.weakImport, &stop);
- }, ^(const char* symbolName) {
- });
- }
- if ( image.hasLazyBindOpcodes() ) {
- image.lazyBindOpcodes().forEachBindTarget(^(const Fixup::BindTarget& bindTarget, bool& stop) {
- callback(bindTarget.symbolName.c_str(), image.header()->libOrdinalName(bindTarget.libOrdinal).c_str(), bindTarget.weakImport, &stop);
- }, ^(const char *symbolName) {
- });
- }
- }
-}
-
-int macho_for_each_imported_symbol(const struct mach_header* _Nonnull mh, size_t mappedSize,
- void (^ _Nonnull callback)(const char* _Nonnull symbolName, const char* _Nonnull libraryPath, bool weakImport, bool* _Nonnull stop))
-{
- if ( mappedSize == 0 ) {
- // Image loaded by dyld, but sanity check
- if ( !((Header*)mh)->hasMachOMagic() )
- return EFTYPE;
- Image image(mh);
- iterateImportedSymbols(image, callback);
- }
- else {
- // raw mach-o file/slice in memory
- Image image(mh, mappedSize, Image::MappingKind::wholeSliceMapped);
- if ( !image.header()->hasMachOMagic() )
- return EFTYPE;
- if ( Error err = image.validate() )
- return EBADMACHO;
- iterateImportedSymbols(image, callback);
- }
- return 0;
-}
-
-static const char* exportSymbolAttrString(const Symbol& symbol)
-{
- uint64_t other;
- if ( symbol.isWeakDef() )
- return "weak-def";
- else if ( symbol.isThreadLocal() )
- return "thread-local";
- else if ( symbol.isDynamicResolver(other) )
- return "dynamic-resolver";
- else if ( symbol.isAbsolute(other) )
- return "absolute";
- return "";
-}
-
-static void iterateExportedSymbols(const Image& image, void (^_Nonnull callback)(const char* _Nonnull symbolName, const char* _Nonnull attributes, bool* _Nonnull stop) )
-{
- if ( image.hasExportsTrie() ) {
- image.exportsTrie().forEachExportedSymbol(^(const Symbol& symbol, bool& stop) {
- callback(symbol.name().c_str(), exportSymbolAttrString(symbol), &stop);
- });
- }
- else if ( image.hasSymbolTable() ) {
- image.symbolTable().forEachExportedSymbol(^(const Symbol& symbol, uint32_t symbolIndex, bool& stop) {
- callback(symbol.name().c_str(), exportSymbolAttrString(symbol), &stop);
- });
- }
-}
-
-int macho_for_each_exported_symbol(const struct mach_header* _Nonnull mh, size_t mappedSize,
- void (^ _Nonnull callback)(const char* _Nonnull symbolName, const char* _Nonnull attributes, bool* _Nonnull stop))
-{
- if ( mappedSize == 0 ) {
- // Image loaded by dyld, but sanity check
- if ( !((Header*)mh)->hasMachOMagic() )
- return EFTYPE;
- Image image(mh);
- iterateExportedSymbols(image, callback);
- }
- else {
- // raw mach-o file/slice in memory
- Image image(mh, mappedSize, Image::MappingKind::wholeSliceMapped);
- if ( !image.header()->hasMachOMagic() )
- return EFTYPE;
- if ( Error err = image.validate() )
- return EBADMACHO;
- iterateExportedSymbols(image, callback);
- }
- return 0;
-}
-
-
-int macho_for_each_defined_rpath(const struct mach_header* _Nonnull mh, size_t mappedSize,
- void (^ _Nonnull callback)(const char* _Nonnull rpath, bool* _Nonnull stop))
-{
- if ( mappedSize == 0 ) {
- // Image loaded by dyld
- Image image(mh);
- image.header()->forEachRPath(^(const char* _Nonnull rpath, bool& stop) {
- callback(rpath, &stop);
- });
- }
- else {
- // raw mach-o file/slice in memory
- Image image(mh, mappedSize, Image::MappingKind::wholeSliceMapped);
- if ( !image.header()->hasMachOMagic() )
- return EFTYPE;
- if ( Error err = image.validate() )
- return EBADMACHO;
- image.header()->forEachRPath(^(const char* _Nonnull rpath, bool& stop) {
- callback(rpath, &stop);
- });
- }
- return 0;
-}
-
-bool macho_source_version(const struct mach_header* _Nonnull mh, uint64_t* _Nonnull version)
-{
- Header* header = (Header*)mh;
- if ( !header->hasMachOMagic() )
- return false;
-
- Version64 v;
- if ( !header->sourceVersion(v) )
- return false;
-
- *version = v.value();
- return true;
-}
-
-#if !TARGET_OS_SIMULATOR
-static bool hasFile(const char* path)
-{
- struct stat statBuf;
- if ( stat(path, &statBuf) == 0 )
- return true;
- char devPath[PATH_MAX];
- strlcpy(devPath, path, sizeof(devPath));
- strlcat(devPath, ".development", sizeof(devPath));
- return ( stat(devPath, &statBuf) == 0 );
-}
-#endif
-
-
-void macho_for_each_runnable_arch_name(void (^ _Nonnull callback)(const char* _Nonnull archName, bool* _Nonnull stop))
-{
- bool stop = false;
-#if TARGET_OS_SIMULATOR
- // FIXME: Should $SIMULATOR_ARCHS be used? Or is this API only about what the current simulator instance can run?
- // fallthrough to arch specific handling
-#elif TARGET_OS_OSX
- if ( hasFile("/System/Cryptexes/OS/System/Library/dyld/dyld_shared_cache_arm64e") ) {
- // Apple Silicon mac
- callback("arm64e", &stop);
- if ( stop )
- return;
- callback("arm64", &stop);
- if ( stop )
- return;
- if ( hasFile("/System/Cryptexes/OS/System/Library/dyld/dyld_shared_cache_x86_64") ) {
- // has Rosetta support
- callback("x86_64", &stop);
- }
- return;
- }
- else if ( hasFile("/System/Cryptexes/OS/System/Library/dyld/dyld_shared_cache_x86_64h") ) {
- // Intel mac
- callback("x86_64h", &stop);
- if ( stop )
- return;
- callback("x86_64", &stop);
- return;
- }
- else if ( hasFile("/System/Cryptexes/OS/System/Library/dyld/dyld_shared_cache_x86_64") ) {
- // Old Intel mac
- callback("x86_64", &stop);
- return;
- }
-#elif TARGET_OS_IOS
- if ( hasFile("/System/Cryptexes/OS/System/Library/Caches/com.apple.dyld/dyld_shared_cache_arm64e") ) {
- // iPhone or iPad
- callback("arm64e", &stop);
- if ( stop )
- return;
- callback("arm64", &stop);
- return;
- }
- else if ( hasFile("/System/Cryptexes/OS/System/Library/Caches/com.apple.dyld/dyld_shared_cache_arm64") ) {
- // old iPhone or ipad
- callback("arm64", &stop);
- return;
- }
-#elif TARGET_OS_WATCH
- // gather grading for architectures
- struct NameAndGrade { const char* name; int grade=0; };
- NameAndGrade gn[3] = { { "arm64e"}, { "arm64"}, { "arm64_32"} };
- if ( hasFile("/System/Library/Caches/com.apple.dyld/dyld_shared_cache_arm64e") ) {
- // M11 or later watch that supports 64-bit userland
- gn[0].grade = Architecture::arm64e.kernelGrade();
- gn[1].grade = Architecture::arm64.kernelGrade();
- }
- if ( hasFile("/System/Library/Caches/com.apple.dyld/dyld_shared_cache_arm64_32") ) {
- gn[2].grade = Architecture::arm64_32.kernelGrade();
- }
- // sort three entries by grade (unrolled bubble sort)
- if ( gn[0].grade < gn[1].grade )
- std::swap(gn[0], gn[1]);
- if ( gn[1].grade < gn[2].grade )
- std::swap(gn[1], gn[2]);
- if ( gn[0].grade < gn[1].grade )
- std::swap(gn[0], gn[1]);
- // return them in grading order
- int usableCount = 0;
- for ( int i=0; i < 3; ++i ) {
- // skip NameAndGrade elements with no grade value
- if ( gn[i].grade != 0 ) {
- ++usableCount;
- callback(gn[i].name, &stop);
- if ( stop )
- return;
- }
- }
- if ( usableCount > 0 )
- return;
- // otherwise fall into no-dyld-cache case below
-#else
- if ( hasFile("/System/Library/Caches/com.apple.dyld/dyld_shared_cache_arm64e") ) {
- // Apple TV or other device with arm64e support
- callback("arm64e", &stop);
- if ( stop )
- return;
- callback("arm64", &stop);
- return;
- }
- else if ( hasFile("/System/Library/Caches/com.apple.dyld/dyld_shared_cache_arm64") ) {
- callback("arm64", &stop);
- return;
- }
-#endif
- if ( stop )
- return;
-
- // no dyld cache, must be RAMDisk
-#if __arm64e__
- callback("arm64e", &stop);
- if ( stop )
- return;
- callback("arm64", &stop);
-#elif __arm64__
- #if __LP64__
- callback("arm64", &stop);
- #else
- callback("arm64_32", &stop);
- #endif
-#elif __x86_64__
- callback("x86_64", &stop);
-#endif
-}
-
-
-
-
#endif // !TARGET_OS_EXCLAVEKIT