virtual const char* name() const { return "mach-o header and load commands"; }
virtual uint64_t size() const;
virtual uint64_t objectAddress() const { return _address; }
+ virtual bool lcBuildVersionDisabled() const;
+
virtual void copyRawContent(uint8_t buffer[]) const;
// overrides of HeaderAndLoadCommandsAbtract
uint8_t* copyDylibIDLoadCommand(uint8_t* p) const;
uint8_t* copyRoutinesLoadCommand(uint8_t* p) const;
uint8_t* copyUUIDLoadCommand(uint8_t* p) const;
- uint8_t* copyVersionLoadCommand(uint8_t* p) const;
+ uint8_t* copyVersionLoadCommand(uint8_t* p, const ld::Platform& platform, uint32_t minVersion, uint32_t sdkVersion) const;
+ uint8_t* copyBuildVersionLoadCommand(uint8_t* p, const ld::Platform& platform, uint32_t minVersion, uint32_t sdkVersion) const;
uint8_t* copySourceVersionLoadCommand(uint8_t* p) const;
uint8_t* copyThreadsLoadCommand(uint8_t* p) const;
uint8_t* copyEntryPointLoadCommand(uint8_t* p) const;
bool _hasDataInCodeLoadCommand;
bool _hasSourceVersionLoadCommand;
bool _hasOptimizationHints;
+ bool _simulatorSupportDylib;
+ ld::VersionSet _platforms;
uint32_t _dylibLoadCommmandsCount;
uint32_t _allowableClientLoadCommmandsCount;
uint32_t _dyldEnvironExrasCount;
mutable uint32_t _linkeditCmdOffset;
mutable uint32_t _symboltableCmdOffset;
std::vector< std::vector<const char*> > _linkerOptions;
+ std::unordered_set<uint64_t>& _toolsVersions;
static ld::Section _s_section;
static ld::Section _s_preload_section;
ld::Atom::definitionRegular, ld::Atom::combineNever,
ld::Atom::scopeTranslationUnit, ld::Atom::typeUnclassified,
ld::Atom::symbolTableNotIn, false, false, false,
- (opts.outputKind() == Options::kPreload) ? ld::Atom::Alignment(0) : ld::Atom::Alignment(12) ),
- _options(opts), _state(state), _writer(writer), _address(0), _uuidCmdInOutputBuffer(NULL), _linkeditCmdOffset(0), _symboltableCmdOffset(0)
+ (opts.outputKind() == Options::kPreload) ? ld::Atom::Alignment(0) : ld::Atom::Alignment(log2(opts.segmentAlignment())) ),
+ _options(opts), _state(state), _writer(writer), _address(0), _uuidCmdInOutputBuffer(NULL), _linkeditCmdOffset(0), _symboltableCmdOffset(0),
+ _toolsVersions(state.toolsVersions)
{
bzero(_uuid, 16);
_hasDyldInfoLoadCommand = opts.makeCompressedDyldInfo();
}
_hasRPathLoadCommands = (_options.rpaths().size() != 0);
_hasSubFrameworkLoadCommand = (_options.umbrellaName() != NULL);
- _hasVersionLoadCommand = _options.addVersionLoadCommand() ||
- (!state.objectFileFoundWithNoVersion && (_options.outputKind() == Options::kObjectFile)
- && ((_options.platform() != Options::kPlatformUnknown) || (state.derivedPlatformLoadCommand != 0)) );
+ _platforms = _options.platforms();
+ if ( _platforms.empty() && (!_state.derivedPlatforms.empty()) )
+ _platforms = _state.derivedPlatforms;
+ if (_platforms.contains(ld::kPlatform_macOS) &&
+ ((strcmp(_options.installPath(), "/usr/lib/system/libsystem_kernel.dylib") == 0)
+ || (strcmp(_options.installPath(), "/usr/lib/system/libsystem_platform.dylib") == 0)
+ || (strcmp(_options.installPath(), "/usr/lib/system/libsystem_pthread.dylib") == 0)
+ || (strcmp(_options.installPath(), "/usr/lib/system/libsystem_platform_debug.dylib") == 0)
+ || (strcmp(_options.installPath(), "/usr/lib/system/libsystem_pthread_debug.dylib") == 0)
+ || (strcmp(_options.installPath(), "/System/Library/PrivateFrameworks/SiriUI.framework/Versions/A/SiriUI") == 0))) {
+ _simulatorSupportDylib = true;
+ } else {
+ _simulatorSupportDylib = false;
+ }
+ _hasVersionLoadCommand = _options.addVersionLoadCommand();
+ // in ld -r mode, only if all input .o files have load command, then add one to output
+ if ( !_hasVersionLoadCommand && (_options.outputKind() == Options::kObjectFile) && !state.objectFileFoundWithNoVersion )
+ _hasVersionLoadCommand = true;
_hasFunctionStartsLoadCommand = _options.addFunctionStarts();
_hasDataInCodeLoadCommand = _options.addDataInCodeInfo();
_hasSourceVersionLoadCommand = _options.needsSourceVersionLoadCommand();
if ( _hasUUIDLoadCommand )
sz += sizeof(macho_uuid_command<P>);
- if ( _hasVersionLoadCommand )
- sz += sizeof(macho_version_min_command<P>);
-
+ if ( _hasVersionLoadCommand ) {
+ if (_simulatorSupportDylib) {
+#if 0
+//FIXME hack to workaround simulator issues without cctools changes
+ sz += sizeof(macho_version_min_command<P>);
+ sz += (_options.platforms().count() * alignedSize(sizeof(macho_build_version_command<P>) + sizeof(macho_build_tool_version<P>)*_toolsVersions.size()));
+#else
+ sz += sizeof(macho_version_min_command<P>);
+#endif
+ } else if (_options.platforms().minOS(ld::supportsLCBuildVersion) && !lcBuildVersionDisabled()) {
+ sz += (_options.platforms().count() * alignedSize(sizeof(macho_build_version_command<P>) + sizeof(macho_build_tool_version<P>)*_toolsVersions.size()));
+ } else {
+ sz += sizeof(macho_version_min_command<P>);
+ }
+ }
+
if ( _hasSourceVersionLoadCommand )
sz += sizeof(macho_source_version_command<P>);
if ( _hasUUIDLoadCommand )
++count;
-
- if ( _hasVersionLoadCommand )
- ++count;
+
+ if ( _hasVersionLoadCommand ) {
+ if (_simulatorSupportDylib) {
+#if 0
+ //FIXME hack to workaround simulator issues without cctools changes
+ ++count;
+ count += _options.platforms().count();
+#else
+ ++count;
+#endif
+ } else if (_options.platforms().minOS(ld::supportsLCBuildVersion) && !lcBuildVersionDisabled()) {
+ count += _options.platforms().count();
+ } else {
+ ++count;
+ }
+ }
if ( _hasSourceVersionLoadCommand )
++count;
bits |= MH_WEAK_DEFINES;
if ( _writer.usesWeakExternalSymbols || _state.hasWeakExternalSymbols )
bits |= MH_BINDS_TO_WEAK;
- if ( _options.prebind() )
- bits |= MH_PREBOUND;
- if ( _options.splitSeg() )
- bits |= MH_SPLIT_SEGS;
if ( (_options.outputKind() == Options::kDynamicLibrary)
&& _writer._noReExportedDylibs
&& _options.useSimplifiedDylibReExports() ) {
bits |= MH_NO_HEAP_EXECUTION;
if ( _options.markAppExtensionSafe() && (_options.outputKind() == Options::kDynamicLibrary) )
bits |= MH_APP_EXTENSION_SAFE;
+#if 0
+ //FIXME hack to workaround simulator issues without cctools changes
+ if (_simulatorSupportDylib)
+ bits |= MH_SIM_SUPPORT;
+#endif
}
if ( _options.hasExecutableStack() )
bits |= MH_ALLOW_STACK_EXECUTION;
template <>
uint32_t HeaderAndLoadCommandsAtom<x86_64>::cpuSubType() const
{
- if ( (_options.outputKind() == Options::kDynamicExecutable) && (_state.cpuSubType == CPU_SUBTYPE_X86_64_ALL) && (_options.macosxVersionMin() >= ld::mac10_5) )
+ if ( (_options.outputKind() == Options::kDynamicExecutable) && (_state.cpuSubType == CPU_SUBTYPE_X86_64_ALL) && _options.platforms().minOS(ld::mac10_5) )
return (_state.cpuSubType | 0x80000000);
else
return _state.cpuSubType;
template <>
uint32_t HeaderAndLoadCommandsAtom<arm64>::cpuSubType() const
{
- return CPU_SUBTYPE_ARM64_ALL;
+ return _state.cpuSubType;
}
if ( cmd->fileoff() == 0 )
cmd->set_fileoff(fsect->fileOffset);
cmd->set_vmsize(fsect->address + fsect->size - cmd->vmaddr());
- if ( (fsect->type() != ld::Section::typeZeroFill) && (fsect->type() != ld::Section::typeTentativeDefs) )
+ if ( !sectionTakesNoDiskSpace(fsect) )
cmd->set_filesize(fsect->fileOffset + fsect->size - cmd->fileoff());
++msect;
}
return S_DTRACE_DOF;
case ld::Section::typeUnwindInfo:
return S_REGULAR;
+ case ld::Section::typeThreadStarts:
+ return S_REGULAR;
case ld::Section::typeObjCClassRefs:
case ld::Section::typeObjC2CategoryList:
return S_REGULAR | S_ATTR_NO_DEAD_STRIP;
template <typename A>
-uint8_t* HeaderAndLoadCommandsAtom<A>::copyVersionLoadCommand(uint8_t* p) const
+uint8_t* HeaderAndLoadCommandsAtom<A>::copyVersionLoadCommand(uint8_t* p, const ld::Platform& platform, uint32_t minVersion, uint32_t sdkVersion) const
{
macho_version_min_command<P>* cmd = (macho_version_min_command<P>*)p;
- switch (_options.platform()) {
- case Options::kPlatformUnknown:
- assert(_state.derivedPlatformLoadCommand != 0 && "unknown platform");
- cmd->set_cmd(_state.derivedPlatformLoadCommand);
- cmd->set_cmdsize(sizeof(macho_version_min_command<P>));
- cmd->set_version(_state.minOSVersion);
- cmd->set_sdk(0);
- break;
- case Options::kPlatformOSX:
+ switch (platform) {
+ case ld::kPlatform_macOS:
cmd->set_cmd(LC_VERSION_MIN_MACOSX);
cmd->set_cmdsize(sizeof(macho_version_min_command<P>));
- cmd->set_version(_state.minOSVersion);
- cmd->set_sdk(_options.sdkVersion());
+ cmd->set_version(minVersion);
+ cmd->set_sdk(sdkVersion);
break;
- case Options::kPlatformiOS:
+ case ld::kPlatform_iOS:
+ case ld::kPlatform_iOSSimulator:
cmd->set_cmd(LC_VERSION_MIN_IPHONEOS);
cmd->set_cmdsize(sizeof(macho_version_min_command<P>));
- cmd->set_version(_state.minOSVersion);
- cmd->set_sdk(_options.sdkVersion());
+ cmd->set_version(minVersion);
+ cmd->set_sdk(sdkVersion);
break;
- case Options::kPlatformWatchOS:
+ case ld::kPlatform_watchOS:
+ case ld::kPlatform_watchOSSimulator:
cmd->set_cmd(LC_VERSION_MIN_WATCHOS);
cmd->set_cmdsize(sizeof(macho_version_min_command<P>));
- cmd->set_version(_state.minOSVersion);
- cmd->set_sdk(_options.sdkVersion());
+ cmd->set_version(minVersion);
+ cmd->set_sdk(sdkVersion);
break;
-#if SUPPORT_APPLE_TV
- case Options::kPlatform_tvOS:
+ case ld::kPlatform_tvOS:
+ case ld::kPlatform_tvOSSimulator:
cmd->set_cmd(LC_VERSION_MIN_TVOS);
cmd->set_cmdsize(sizeof(macho_version_min_command<P>));
- cmd->set_version(_state.minOSVersion);
- cmd->set_sdk(_options.sdkVersion());
+ cmd->set_version(minVersion);
+ cmd->set_sdk(sdkVersion);
+ break;
+ case ld::kPlatform_unknown:
+ assert(0 && "unknown platform");
+ break;
+ case ld::kPlatform_iOSMac:
+ assert(0 && "iOSMac uses LC_BUILD_VERSION");
+ break;
+ case ld::kPlatform_bridgeOS:
+ assert(0 && "bridgeOS uses LC_BUILD_VERSION");
break;
-#endif
}
return p + sizeof(macho_version_min_command<P>);
}
+
+
+template <typename A>
+ uint8_t* HeaderAndLoadCommandsAtom<A>::copyBuildVersionLoadCommand(uint8_t* p, const ld::Platform& platform, uint32_t minVersion, uint32_t sdkVersion) const
+{
+ macho_build_version_command<P>* cmd = (macho_build_version_command<P>*)p;
+
+ cmd->set_cmd(LC_BUILD_VERSION);
+ cmd->set_cmdsize(alignedSize(sizeof(macho_build_version_command<P>) + sizeof(macho_build_tool_version<P>)*_toolsVersions.size()));
+ cmd->set_platform(platform);
+ cmd->set_minos(minVersion);
+ cmd->set_sdk(sdkVersion);
+ cmd->set_ntools(_toolsVersions.size());
+ macho_build_tool_version<P>* tools = (macho_build_tool_version<P>*)(p + sizeof(macho_build_version_command<P>));
+ for (uint64_t tool : _toolsVersions) {
+ tools->set_tool((uint64_t)tool >> 32);
+ tools->set_version(tool & 0xFFFFFFFF);
+ ++tools;
+ }
+
+ return p + cmd->cmdsize();
+}
+
+
template <typename A>
uint8_t* HeaderAndLoadCommandsAtom<A>::copySourceVersionLoadCommand(uint8_t* p) const
{
{
uint32_t sz = alignedSize(sizeof(macho_dylib_command<P>) + strlen(dylib->installPath()) + 1);
macho_dylib_command<P>* cmd = (macho_dylib_command<P>*)p;
+ bool weakLink = dylib->forcedWeakLinked() || dylib->allSymbolsAreWeakImported();
+ bool upward = dylib->willBeUpwardDylib() && _options.useUpwardDylibs();
+ bool reExport = dylib->willBeReExported() && _options.useSimplifiedDylibReExports();
+ if ( weakLink && upward )
+ warning("cannot weak upward link. Dropping weak for %s", dylib->installPath());
+ if ( weakLink && reExport )
+ warning("cannot weak re-export a dylib. Dropping weak for %s", dylib->installPath());
if ( dylib->willBeLazyLoadedDylib() )
cmd->set_cmd(LC_LAZY_LOAD_DYLIB);
- else if ( dylib->forcedWeakLinked() || dylib->allSymbolsAreWeakImported() )
- cmd->set_cmd(LC_LOAD_WEAK_DYLIB);
- else if ( dylib->willBeReExported() && _options.useSimplifiedDylibReExports() )
+ else if ( reExport )
cmd->set_cmd(LC_REEXPORT_DYLIB);
- else if ( dylib->willBeUpwardDylib() && _options.useUpwardDylibs() )
+ else if ( upward )
cmd->set_cmd(LC_LOAD_UPWARD_DYLIB);
+ else if ( weakLink )
+ cmd->set_cmd(LC_LOAD_WEAK_DYLIB);
else
cmd->set_cmd(LC_LOAD_DYLIB);
cmd->set_cmdsize(sz);
return p + sizeof(macho_linkedit_data_command<P>);
}
+template <typename A>
+bool HeaderAndLoadCommandsAtom<A>::lcBuildVersionDisabled() const {
+ static std::once_flag envChecked;
+ static bool disabled = false;
+ std::call_once(envChecked, [&](){
+ if (getenv("LD_FORCE_LEGACY_VERSION_LOAD_CMDS") != nullptr ) {
+ disabled = true;
+ }
+ });
+ return disabled;
+}
template <typename A>
void HeaderAndLoadCommandsAtom<A>::copyRawContent(uint8_t buffer[]) const
mh->set_flags(this->flags());
// copy load commands
- uint8_t* p = &buffer[sizeof(macho_header<P>)];
+
__block uint8_t* p = &buffer[sizeof(macho_header<P>)];
if ( _options.outputKind() == Options::kObjectFile )
p = this->copySingleSegmentLoadCommand(p);
if ( _hasUUIDLoadCommand )
p = this->copyUUIDLoadCommand(p);
-
- if ( _hasVersionLoadCommand )
- p = this->copyVersionLoadCommand(p);
+
+ if ( _hasVersionLoadCommand ) {
+ if (_simulatorSupportDylib) {
+#if 0
+ //FIXME hack to workaround simulator issues without cctools changes
+ p = this->copyVersionLoadCommand(p, ld::kPlatform_macOS, 0, _options.sdkVersion());
+ _options.platforms().forEach(^(ld::Platform platform, uint32_t version, bool &stop) {
+ p = this->copyBuildVersionLoadCommand(p, platform, version, _options.sdkVersion());
+ });
+#else
+ _options.platforms().forEach(^(ld::Platform platform, uint32_t version, bool &stop) {
+ if (platform == ld::kPlatform_macOS) {
+ p = this->copyVersionLoadCommand(p, platform, version, _options.sdkVersion());
+ }
+ });
+#endif
+ } else if (_options.platforms().minOS(ld::supportsLCBuildVersion) && !lcBuildVersionDisabled()) {
+ _options.platforms().forEach(^(ld::Platform platform, uint32_t version, bool &stop) {
+ p = this->copyBuildVersionLoadCommand(p, platform, version, _options.sdkVersion());
+ });
+ } else {
+ assert(_platforms.count() == 1 && "LC_BUILD_VERSION required when there are multiple platforms");
+ _options.platforms().forEach(^(ld::Platform platform, uint32_t version, bool &stop) {
+ p = this->copyVersionLoadCommand(p, platform, version, _options.sdkVersion());
+ });
+ }
+ }
if ( _hasSourceVersionLoadCommand )
p = this->copySourceVersionLoadCommand(p);
projects / apple / ld64.git / blobdiff