#include <set>
#include <map>
#include <algorithm>
+#include <type_traits>
#include "dwarf2.h"
#include "debugline.h"
#include "Architectures.hpp"
+#include "Bitcode.hpp"
#include "ld.hpp"
#include "macho_relocatable_file.h"
File(const char* p, time_t mTime, const uint8_t* content, ld::File::Ordinal ord) :
ld::relocatable::File(p,mTime,ord), _fileContent(content),
_sectionsArray(NULL), _atomsArray(NULL),
- _sectionsArrayCount(0), _atomsArrayCount(0),
+ _sectionsArrayCount(0), _atomsArrayCount(0), _aliasAtomsArrayCount(0),
_debugInfoKind(ld::relocatable::File::kDebugInfoNone),
_dwarfTranslationUnitPath(NULL),
_dwarfDebugInfoSect(NULL), _dwarfDebugAbbrevSect(NULL),
_objConstraint(ld::File::objcConstraintNone),
_swiftVersion(0),
_cpuSubType(0),
- _canScatterAtoms(false) {}
+ _minOSVersion(0),
+ _platform(0),
+ _canScatterAtoms(false),
+ _srcKind(kSourceUnknown) {}
virtual ~File();
// overrides of ld::File
virtual bool forEachAtom(ld::File::AtomHandler&) const;
virtual bool justInTimeforEachAtom(const char* name, ld::File::AtomHandler&) const
{ return false; }
-
+ virtual uint32_t minOSVersion() const { return _minOSVersion; }
+ virtual uint32_t platformLoadCommand() const { return _platform; }
+
// overrides of ld::relocatable::File
virtual ObjcConstraint objCConstraint() const { return _objConstraint; }
virtual uint32_t cpuSubType() const { return _cpuSubType; }
virtual const char* translationUnitSource() const;
virtual LinkerOptionsList* linkerOptions() const { return &_linkerOptions; }
virtual uint8_t swiftVersion() const { return _swiftVersion; }
+ virtual ld::Bitcode* getBitcode() const { return _bitcode.get(); }
+ virtual SourceKind sourceKind() const { return _srcKind; }
+ virtual void setSourceKind(SourceKind src) { _srcKind = src; }
const uint8_t* fileContent() { return _fileContent; }
private:
ld::File::ObjcConstraint _objConstraint;
uint8_t _swiftVersion;
uint32_t _cpuSubType;
+ uint32_t _minOSVersion;
+ uint32_t _platform;
bool _canScatterAtoms;
std::vector<std::vector<const char*> > _linkerOptions;
+ std::unique_ptr<ld::Bitcode> _bitcode;
+ SourceKind _srcKind;
};
virtual ld::Atom::Alignment alignmentForAddress(pint_t addr);
virtual ld::Atom::ContentType contentType() { return ld::Atom::typeUnclassified; }
virtual bool dontDeadStrip() { return (this->_machOSection->flags() & S_ATTR_NO_DEAD_STRIP); }
+ virtual bool dontDeadStripIfReferencesLive() { return ( (this->_machOSection != NULL) && (this->_machOSection->flags() & S_ATTR_LIVE_SUPPORT) ); }
virtual Atom<A>* findAtomByAddress(pint_t addr) { return this->findContentAtomByAddress(addr, this->_beginAtoms, this->_endAtoms); }
virtual bool addFollowOnFixups() const { return ! _file.canScatterAtoms(); }
virtual uint32_t appendAtoms(class Parser<A>& parser, uint8_t* buffer,
static ld::Fixup::Kind fixupKind();
};
+template <typename A>
+class TLVPointerSection : public FixedSizeSection<A>
+{
+public:
+ TLVPointerSection(Parser<A>& parser, File<A>& f, const macho_section<typename A::P>* s)
+ : FixedSizeSection<A>(parser, f, s) {}
+protected:
+ typedef typename A::P::uint_t pint_t;
+ typedef typename A::P P;
+
+ virtual ld::Atom::ContentType contentType() { return ld::Atom::typeTLVPointer; }
+ virtual ld::Atom::Alignment alignmentForAddress(pint_t addr) { return ld::Atom::Alignment(log2(sizeof(pint_t))); }
+ virtual const char* unlabeledAtomName(Parser<A>&, pint_t) { return "tlv_lazy_ptr"; }
+ virtual pint_t elementSizeAtAddress(pint_t addr) { return sizeof(pint_t); }
+ virtual ld::Atom::Combine combine(Parser<A>&, pint_t);
+ virtual bool ignoreLabel(const char* label) const { return true; }
+ virtual unsigned long contentHash(const class Atom<A>* atom, const ld::IndirectBindingTable& ind) const;
+ virtual bool canCoalesceWith(const class Atom<A>* atom, const ld::Atom& rhs,
+ const ld::IndirectBindingTable& ind) const;
+
+private:
+ static const char* targetName(const class Atom<A>* atom, const ld::IndirectBindingTable& ind, bool* isStatic);
+};
+
template <typename A>
class CFStringSection : public FixedSizeSection<A>
parser.combineFromSymbol(sym), parser.scopeFromSymbol(sym),
parser.resolverFromSymbol(sym) ? ld::Atom::typeResolver : sct.contentType(),
parser.inclusionFromSymbol(sym),
- parser.dontDeadStripFromSymbol(sym) || sct.dontDeadStrip(),
+ (parser.dontDeadStripFromSymbol(sym) && !sct.dontDeadStripIfReferencesLive()) || sct.dontDeadStrip(),
parser.isThumbFromSymbol(sym), alias,
sct.alignmentForAddress(sym.n_value())),
_size(sz), _objAddress(sym.n_value()),
if ( _scope == ld::Atom::scopeGlobal &&
(sym.n_desc() & (N_WEAK_DEF|N_WEAK_REF)) == (N_WEAK_DEF|N_WEAK_REF) )
this->setAutoHide();
- this->verifyAlignment(*sct.machoSection());
+ this->verifyAlignment(*sct.machoSection());
+ if ( sct.dontDeadStripIfReferencesLive() )
+ this->setDontDeadStripIfReferencesLive();
}
private:
static bool validFile(const uint8_t* fileContent, bool subtypeMustMatch=false,
cpu_subtype_t subtype=0);
static const char* fileKind(const uint8_t* fileContent);
+ static Options::Platform findPlatform(const macho_header<typename A::P>* header);
static bool hasObjC2Categories(const uint8_t* fileContent);
static bool hasObjC1Categories(const uint8_t* fileContent);
+ static bool getNonLocalSymbols(const uint8_t* fileContnet, std::vector<const char*> &syms);
static ld::relocatable::File* parse(const uint8_t* fileContent, uint64_t fileLength,
const char* path, time_t modTime, ld::File::Ordinal ordinal,
const ParserOptions& opts) {
Parser p(fileContent, fileLength, path, modTime,
ordinal, opts.warnUnwindConversionProblems,
opts.keepDwarfUnwind, opts.forceDwarfConversion,
- opts.neverConvertDwarf, opts.verboseOptimizationHints);
+ opts.neverConvertDwarf, opts.verboseOptimizationHints,
+ opts.ignoreMismatchPlatform);
return p.parse(opts);
}
sectionTypeUTF16Strings, sectionTypeCFString, sectionTypeObjC2ClassRefs, typeObjC2CategoryList,
sectionTypeObjC1Classes, sectionTypeSymboled, sectionTypeObjC1ClassRefs,
sectionTypeTentativeDefinitions, sectionTypeAbsoluteSymbols, sectionTypeTLVDefs,
- sectionTypeCompactUnwind };
+ sectionTypeCompactUnwind, sectionTypeTLVPointers};
template <typename P>
struct MachOSectionAndSectionClass
Parser(const uint8_t* fileContent, uint64_t fileLength,
const char* path, time_t modTime, ld::File::Ordinal ordinal,
bool warnUnwindConversionProblems, bool keepDwarfUnwind,
- bool forceDwarfConversion, bool neverConvertDwarf, bool verboseOptimizationHints);
+ bool forceDwarfConversion, bool neverConvertDwarf,
+ bool verboseOptimizationHints, bool ignoreMismatchPlatform);
ld::relocatable::File* parse(const ParserOptions& opts);
- uint8_t loadCommandSizeMask();
- bool parseLoadCommands();
+ static uint8_t loadCommandSizeMask();
+ bool parseLoadCommands(Options::Platform platform, uint32_t minOSVersion, bool simulator, bool ignoreMismatchPlatform);
void makeSections();
void prescanSymbolTable();
void makeSortedSymbolsArray(uint32_t symArray[], const uint32_t sectionArray[]);
bool _neverConvertDwarf;
bool _verboseOptimizationHints;
bool _armUsesZeroCostExceptions;
+ bool _ignoreMismatchPlatform;
unsigned int _stubsSectionNum;
const macho_section<P>* _stubsMachOSection;
std::vector<const char*> _dtraceProviderInfo;
template <typename A>
Parser<A>::Parser(const uint8_t* fileContent, uint64_t fileLength, const char* path, time_t modTime,
ld::File::Ordinal ordinal, bool convertDUI, bool keepDwarfUnwind, bool forceDwarfConversion,
- bool neverConvertDwarf, bool verboseOptimizationHints)
+ bool neverConvertDwarf, bool verboseOptimizationHints, bool ignoreMismatchPlatform)
: _fileContent(fileContent), _fileLength(fileLength), _path(path), _modTime(modTime),
_ordinal(ordinal), _file(NULL),
_symbols(NULL), _symbolCount(0), _indirectSymbolCount(0), _strings(NULL), _stringsSize(0),
_keepDwarfUnwind(keepDwarfUnwind), _forceDwarfConversion(forceDwarfConversion),
_neverConvertDwarf(neverConvertDwarf),
_verboseOptimizationHints(verboseOptimizationHints),
+ _ignoreMismatchPlatform(ignoreMismatchPlatform),
_stubsSectionNum(0), _stubsMachOSection(NULL)
{
}
const char* Parser<x86_64>::fileKind(const uint8_t* fileContent)
{
const macho_header<P>* header = (const macho_header<P>*)fileContent;
- if ( header->magic() != MH_MAGIC )
+ if ( header->magic() != MH_MAGIC_64 )
return NULL;
if ( header->cputype() != CPU_TYPE_X86_64 )
return NULL;
const char* Parser<arm64>::fileKind(const uint8_t* fileContent)
{
const macho_header<P>* header = (const macho_header<P>*)fileContent;
- if ( header->magic() != MH_MAGIC )
+ if ( header->magic() != MH_MAGIC_64 )
return NULL;
if ( header->cputype() != CPU_TYPE_ARM64 )
return NULL;
return false;
}
+
+template <typename A>
+bool Parser<A>::getNonLocalSymbols(const uint8_t* fileContent, std::vector<const char*> &syms)
+{
+ const macho_header<P>* header = (const macho_header<P>*)fileContent;
+ const uint32_t cmd_count = header->ncmds();
+ const macho_load_command<P>* const cmds = (macho_load_command<P>*)((char*)header + sizeof(macho_header<P>));
+ const macho_load_command<P>* const cmdsEnd = (macho_load_command<P>*)((char*)header + sizeof(macho_header<P>) + header->sizeofcmds());
+ const macho_load_command<P>* cmd = cmds;
+ for (uint32_t i = 0; i < cmd_count; ++i) {
+ if ( cmd->cmd() == LC_SYMTAB ) {
+ const macho_symtab_command<P>* symtab = (macho_symtab_command<P>*)cmd;
+ uint32_t symbolCount = symtab->nsyms();
+ const macho_nlist<P>* symbols = (const macho_nlist<P>*)(fileContent + symtab->symoff());
+ const char* strings = (char*)fileContent + symtab->stroff();
+ for (uint32_t i = 0; i < symbolCount; ++i) {
+ // ignore stabs and count only ext symbols
+ if ( (symbols[i].n_type() & N_STAB) == 0 &&
+ (symbols[i].n_type() & N_EXT) != 0 ) {
+ const char* symName = &strings[symbols[i].n_strx()];
+ syms.push_back(symName);
+ }
+ }
+ return true;
+ }
+ cmd = (const macho_load_command<P>*)(((char*)cmd)+cmd->cmdsize());
+ if ( cmd > cmdsEnd )
+ throwf("malformed mach-o file, load command #%d is outside size of load commands", i);
+ }
+ return false;
+}
+
+
template <typename A>
int Parser<A>::pointerSorter(const void* l, const void* r)
{
// create file object
_file = new File<A>(_path, _modTime, _fileContent, _ordinal);
+ // set input source
+ _file->setSourceKind(opts.srcKind);
+
// respond to -t option
if ( opts.logAllFiles )
printf("%s\n", _path);
_armUsesZeroCostExceptions = opts.armUsesZeroCostExceptions;
// parse start of mach-o file
- if ( ! parseLoadCommands() )
+ if ( ! parseLoadCommands(opts.platform, opts.minOSVersion, opts.simulator, opts.ignoreMismatchPlatform) )
return _file;
// make array of
p += sizeof(Atom<A>);
}
assert(fixupOffset == _allFixups.size());
- _file->_fixups.reserve(fixupOffset);
+ _file->_fixups.resize(fixupOffset);
// copy each fixup for each atom
for(typename std::vector<FixupInAtom>::iterator it=_allFixups.begin(); it != _allFixups.end(); ++it) {
return _file;
}
+static void versionToString(uint32_t value, char buffer[32])
+{
+ if ( value & 0xFF )
+ sprintf(buffer, "%d.%d.%d", value >> 16, (value >> 8) & 0xFF, value & 0xFF);
+ else
+ sprintf(buffer, "%d.%d", value >> 16, (value >> 8) & 0xFF);
+}
template <> uint8_t Parser<x86>::loadCommandSizeMask() { return 0x03; }
template <> uint8_t Parser<x86_64>::loadCommandSizeMask() { return 0x07; }
template <> uint8_t Parser<arm64>::loadCommandSizeMask() { return 0x07; }
template <typename A>
-bool Parser<A>::parseLoadCommands()
+bool Parser<A>::parseLoadCommands(Options::Platform platform, uint32_t linkMinOSVersion, bool simulator, bool ignoreMismatchPlatform)
{
const macho_header<P>* header = (const macho_header<P>*)_fileContent;
// <rdar://problem/5394172> an empty .o file with zero load commands will crash linker
if ( cmd_count == 0 )
return false;
+ Options::Platform lcPlatform = Options::kPlatformUnknown;
const macho_load_command<P>* const cmds = (macho_load_command<P>*)((char*)header + sizeof(macho_header<P>));
const macho_load_command<P>* const cmdsEnd = (macho_load_command<P>*)((char*)header + sizeof(macho_header<P>) + header->sizeofcmds());
const macho_load_command<P>* cmd = cmds;
throw "LC_LINKER_OPTIMIZATION_HINTS table extends beyond end of file";
}
break;
+ case LC_VERSION_MIN_MACOSX:
+ case LC_VERSION_MIN_IPHONEOS:
+ case LC_VERSION_MIN_WATCHOS:
+ #if SUPPORT_APPLE_TV
+ case LC_VERSION_MIN_TVOS:
+ #endif
+ if ( ignoreMismatchPlatform )
+ break;
+ _file->_platform = cmd->cmd();
+ lcPlatform = Options::platformForLoadCommand(cmd->cmd());
+ _file->_minOSVersion = ((macho_version_min_command<P>*)cmd)->version();
+ break;
default:
if ( cmd->cmd() == macho_segment_command<P>::CMD ) {
if ( segment != NULL )
if ( cmd > cmdsEnd )
throwf("malformed mach-o file, load command #%d is outside size of load commands", i);
}
+ // arm/arm64 objects are default to ios platform if not set.
+ // rdar://problem/21746314
+ if (lcPlatform == Options::kPlatformUnknown &&
+ (std::is_same<A, arm>::value || std::is_same<A, arm64>::value))
+ lcPlatform = Options::kPlatformiOS;
+
+ // Check platform cross-linking.
+ if ( !ignoreMismatchPlatform ) {
+ if ( lcPlatform != platform ) {
+ switch (platform) {
+ case Options::kPlatformOSX:
+ case Options::kPlatformiOS:
+ if ( lcPlatform == Options::kPlatformUnknown )
+ break;
+ // fall through if the Platform is not Unknown
+ case Options::kPlatformWatchOS:
+ // WatchOS errors on cross-linking all the time.
+ throwf("building for %s%s, but linking in object file built for %s,",
+ Options::platformName(platform), (simulator ? " simulator" : ""),
+ Options::platformName(lcPlatform));
+ break;
+ #if SUPPORT_APPLE_TV
+ case Options::kPlatform_tvOS:
+ // tvOS is a warning temporarily. rdar://problem/21746965
+ if (platform == Options::kPlatform_tvOS)
+ warning("URGENT: building for %s%s, but linking in object file (%s) built for %s. "
+ "Note: This will be an error in the future.",
+ Options::platformName(platform), (simulator ? " simulator" : ""), path(),
+ Options::platformName(lcPlatform));
+ break;
+ #endif
+ case Options::kPlatformUnknown:
+ // skip if the target platform is unknown
+ break;
+ }
+ }
+ if ( linkMinOSVersion && (_file->_minOSVersion > linkMinOSVersion) ) {
+ char t1[32];
+ char t2[32];
+ versionToString(_file->_minOSVersion, t1);
+ versionToString(linkMinOSVersion, t2);
+ warning("object file (%s) was built for newer %s version (%s) than being linked (%s)",
+ _path, Options::platformName(lcPlatform), t1, t2);
+ }
+ }
+
// record range of sections
if ( segment == NULL )
return true;
}
+template <typename A>
+Options::Platform Parser<A>::findPlatform(const macho_header<P>* header)
+{
+ const uint32_t cmd_count = header->ncmds();
+ if ( cmd_count == 0 )
+ return Options::kPlatformUnknown;
+ const macho_load_command<P>* const cmds = (macho_load_command<P>*)((char*)header + sizeof(macho_header<P>));
+ const macho_load_command<P>* const cmdsEnd = (macho_load_command<P>*)((char*)header + sizeof(macho_header<P>) + header->sizeofcmds());
+ const macho_load_command<P>* cmd = cmds;
+ for (uint32_t i = 0; i < cmd_count; ++i) {
+ uint32_t size = cmd->cmdsize();
+ if ( (size & loadCommandSizeMask()) != 0 )
+ throwf("load command #%d has a unaligned size", i);
+ const uint8_t* endOfCmd = ((uint8_t*)cmd)+cmd->cmdsize();
+ if ( endOfCmd > (uint8_t*)cmdsEnd )
+ throwf("load command #%d extends beyond the end of the load commands", i);
+ switch (cmd->cmd()) {
+ case LC_VERSION_MIN_MACOSX:
+ return Options::kPlatformOSX;
+ case LC_VERSION_MIN_IPHONEOS:
+ return Options::kPlatformiOS;
+ }
+ cmd = (const macho_load_command<P>*)(((char*)cmd)+cmd->cmdsize());
+ if ( cmd > cmdsEnd )
+ throwf("malformed mach-o file, load command #%d is outside size of load commands", i);
+ }
+ return Options::kPlatformUnknown;
+}
+
template <typename A>
void Parser<A>::prescanSymbolTable()
// allocate raw storage for all section objects on stack
MachOSectionAndSectionClass<P>* machOSects = (MachOSectionAndSectionClass<P>*)machOSectsStorage;
unsigned int count = 0;
+ // local variable for bitcode parsing
+ const macho_section<P>* bitcodeSect = NULL;
+ const macho_section<P>* cmdlineSect = NULL;
+ const macho_section<P>* swiftCmdlineSect = NULL;
+ const macho_section<P>* bundleSect = NULL;
+ bool bitcodeAsm = false;
+
for (uint32_t i=0; i < _machOSectionsCount; ++i) {
const macho_section<P>* sect = &_sectionsStart[i];
if ( (sect->flags() & S_ATTR_DEBUG) != 0 ) {
}
}
}
+ if ( strcmp(sect->segname(), "__LLVM") == 0 ) {
+ if ( strncmp(sect->sectname(), "__bitcode", 9) == 0 ) {
+ bitcodeSect = sect;
+ } else if ( strncmp(sect->sectname(), "__cmdline", 9) == 0 ) {
+ cmdlineSect = sect;
+ } else if ( strncmp(sect->sectname(), "__swift_cmdline", 15) == 0 ) {
+ swiftCmdlineSect = sect;
+ } else if ( strncmp(sect->sectname(), "__bundle", 8) == 0 ) {
+ bundleSect = sect;
+ } else if ( strncmp(sect->sectname(), "__asm", 5) == 0 ) {
+ bitcodeAsm = true;
+ }
+ // If it is not single input for ld -r, don't count the section
+ // otherwise, fall through and add it to the sections.
+ if (_file->sourceKind() != ld::relocatable::File::kSourceSingle)
+ continue;
+ }
// ignore empty __OBJC sections
if ( (sect->size() == 0) && (strcmp(sect->segname(), "__OBJC") == 0) )
continue;
totalSectionsSize += sizeof(NonLazyPointerSection<A>);
machOSects[count++].type = sectionTypeNonLazy;
break;
+ case S_THREAD_LOCAL_VARIABLE_POINTERS:
+ totalSectionsSize += sizeof(TLVPointerSection<A>);
+ machOSects[count++].type = sectionTypeTLVPointers;
+ break;
case S_LITERAL_POINTERS:
if ( (strcmp(sect->segname(), "__OBJC") == 0) && (strcmp(sect->sectname(), "__cls_refs") == 0) ) {
totalSectionsSize += sizeof(Objc1ClassReferences<A>);
totalSectionsSize += sizeof(TLVDefsSection<A>);
machOSects[count++].type = sectionTypeTLVDefs;
break;
- case S_THREAD_LOCAL_VARIABLE_POINTERS:
default:
throwf("unknown section type %d", sect->flags() & SECTION_TYPE);
}
}
+
+ // Create bitcode
+ if ( bitcodeSect != NULL ) {
+ if ( cmdlineSect != NULL )
+ _file->_bitcode = std::unique_ptr<ld::Bitcode>(new ld::ClangBitcode(&_fileContent[bitcodeSect->offset()], bitcodeSect->size(),
+ &_fileContent[cmdlineSect->offset()], cmdlineSect->size()));
+ else if ( swiftCmdlineSect != NULL )
+ _file->_bitcode = std::unique_ptr<ld::Bitcode>(new ld::SwiftBitcode(&_fileContent[bitcodeSect->offset()], bitcodeSect->size(),
+ &_fileContent[swiftCmdlineSect->offset()], swiftCmdlineSect->size()));
+ else
+ throwf("Object file with bitcode missing cmdline options: %s", _file->path());
+ }
+ else if ( bundleSect != NULL )
+ _file->_bitcode = std::unique_ptr<ld::Bitcode>(new ld::BundleBitcode(&_fileContent[bundleSect->offset()], bundleSect->size()));
+ else if ( bitcodeAsm )
+ _file->_bitcode = std::unique_ptr<ld::Bitcode>(new ld::AsmBitcode(_fileContent, _fileLength));
// sort by address (mach-o object files don't aways have sections sorted)
::qsort(machOSects, count, sizeof(MachOSectionAndSectionClass<P>), MachOSectionAndSectionClass<P>::sorter);
*objects++ = new (space) NonLazyPointerSection<A>(*this, *_file, machOSects[i].sect);
space += sizeof(NonLazyPointerSection<A>);
break;
+ case sectionTypeTLVPointers:
+ *objects++ = new (space) TLVPointerSection<A>(*this, *_file, machOSects[i].sect);
+ space += sizeof(TLVPointerSection<A>);
+ break;
case sectionTypeCFI:
_EHFrameSection = new (space) CFISection<A>(*this, *_file, machOSects[i].sect);
*objects++ = _EHFrameSection;
p += sizeof(Atom<A>);
}
assert(liOffset == entries.size());
- _file->_lineInfos.reserve(liOffset);
+ _file->_lineInfos.resize(liOffset);
// copy each line info for each atom
for (typename std::vector<AtomAndLineInfo<A> >::iterator it = entries.begin(); it != entries.end(); ++it) {
return _dwarfTranslationUnitPath;
}
-
-
template <typename A>
bool File<A>::forEachAtom(ld::File::AtomHandler& handler) const
{
return ld::Section::typeTLVZeroFill;
case S_THREAD_LOCAL_VARIABLES:
return ld::Section::typeTLVDefs;
+ case S_THREAD_LOCAL_VARIABLE_POINTERS:
+ return ld::Section::typeTLVPointers;
case S_THREAD_LOCAL_INIT_FUNCTION_POINTERS:
return ld::Section::typeTLVInitializerPointers;
}
const pint_t* content = (pint_t*)(this->file().fileContent() + this->_machOSection->offset() + reloc->r_address());
pint_t personalityAddr = *content;
Section<arm64>* personalitySection = parser.sectionForAddress(personalityAddr);
+ (void)personalitySection;
assert((personalitySection->type() == ld::Section::typeCode) && "personality column in __compact_unwind section is not pointer to function");
// atoms may not be constructed yet, so scan symbol table for labels
const char* name = parser.scanSymbolTableForAddress(personalityAddr);
return ld::Atom::scopeLinkageUnit;
}
+
+
+template <typename A>
+ld::Atom::Combine TLVPointerSection<A>::combine(Parser<A>& parser, pint_t addr)
+{
+ return ld::Atom::combineByNameAndReferences;
+}
+
+
+template <typename A>
+const char* TLVPointerSection<A>::targetName(const class Atom<A>* atom, const ld::IndirectBindingTable& ind, bool* isStatic)
+{
+ assert(atom->combine() == ld::Atom::combineByNameAndReferences);
+ assert(atom->fixupCount() == 1);
+ *isStatic = false;
+ ld::Fixup::iterator fit = atom->fixupsBegin();
+ const char* name = NULL;
+ switch ( fit->binding ) {
+ case ld::Fixup::bindingByNameUnbound:
+ name = fit->u.name;
+ break;
+ case ld::Fixup::bindingByContentBound:
+ name = fit->u.target->name();
+ break;
+ case ld::Fixup::bindingsIndirectlyBound:
+ name = ind.indirectName(fit->u.bindingIndex);
+ break;
+ case ld::Fixup::bindingDirectlyBound:
+ name = fit->u.target->name();
+ *isStatic = (fit->u.target->scope() == ld::Atom::scopeTranslationUnit);
+ break;
+ default:
+ assert(0);
+ }
+ assert(name != NULL);
+ return name;
+}
+
+template <typename A>
+unsigned long TLVPointerSection<A>::contentHash(const class Atom<A>* atom, const ld::IndirectBindingTable& ind) const
+{
+ assert(atom->combine() == ld::Atom::combineByNameAndReferences);
+ unsigned long hash = 9508;
+ bool isStatic;
+ for (const char* s = this->targetName(atom, ind, &isStatic); *s != '\0'; ++s) {
+ hash = hash * 33 + *s;
+ }
+ return hash;
+}
+
+template <typename A>
+bool TLVPointerSection<A>::canCoalesceWith(const class Atom<A>* atom, const ld::Atom& rhs,
+ const ld::IndirectBindingTable& indirectBindingTable) const
+{
+ if ( rhs.section().type() != ld::Section::typeTLVPointers )
+ return false;
+ assert(this->type() == rhs.section().type());
+ const Atom<A>* rhsAtom = dynamic_cast<const Atom<A>*>(&rhs);
+ assert(rhsAtom != NULL);
+ bool thisIsStatic;
+ bool rhsIsStatic;
+ const char* thisName = this->targetName(atom, indirectBindingTable, &thisIsStatic);
+ const char* rhsName = this->targetName(rhsAtom, indirectBindingTable, &rhsIsStatic);
+ return !thisIsStatic && !rhsIsStatic && (strcmp(thisName, rhsName) == 0);
+}
+
+
template <typename A>
const uint8_t* CFStringSection<A>::targetContent(const class Atom<A>* atom, const ld::IndirectBindingTable& ind,
ContentType* ct, unsigned int* count)
case ARM64_RELOC_UNSIGNED:
if ( reloc->r_pcrel() )
throw "pcrel and ARM64_RELOC_UNSIGNED not supported";
- target.addend = contentValue;
+ if ( reloc->r_extern() )
+ target.addend = contentValue;
switch ( reloc->r_length() ) {
case 0:
case 1:
//
// used by linker to infer architecture when no -arch is on command line
//
-bool isObjectFile(const uint8_t* fileContent, cpu_type_t* result, cpu_subtype_t* subResult)
+bool isObjectFile(const uint8_t* fileContent, cpu_type_t* result, cpu_subtype_t* subResult, Options::Platform* platform)
{
if ( mach_o::relocatable::Parser<x86_64>::validFile(fileContent) ) {
*result = CPU_TYPE_X86_64;
const macho_header<Pointer64<LittleEndian> >* header = (const macho_header<Pointer64<LittleEndian> >*)fileContent;
*subResult = header->cpusubtype();
+ *platform = Parser<x86_64>::findPlatform(header);
return true;
}
if ( mach_o::relocatable::Parser<x86>::validFile(fileContent) ) {
+ const macho_header<Pointer32<LittleEndian> >* header = (const macho_header<Pointer32<LittleEndian> >*)fileContent;
*result = CPU_TYPE_I386;
*subResult = CPU_SUBTYPE_X86_ALL;
+ *platform = Parser<x86>::findPlatform(header);
return true;
}
if ( mach_o::relocatable::Parser<arm>::validFile(fileContent, false, 0) ) {
- *result = CPU_TYPE_ARM;
const macho_header<Pointer32<LittleEndian> >* header = (const macho_header<Pointer32<LittleEndian> >*)fileContent;
+ *result = CPU_TYPE_ARM;
*subResult = header->cpusubtype();
+ *platform = Parser<arm>::findPlatform(header);
return true;
}
if ( mach_o::relocatable::Parser<arm64>::validFile(fileContent, false, 0) ) {
+ const macho_header<Pointer64<LittleEndian> >* header = (const macho_header<Pointer64<LittleEndian> >*)fileContent;
*result = CPU_TYPE_ARM64;
*subResult = CPU_SUBTYPE_ARM64_ALL;
+ *platform = Parser<arm64>::findPlatform(header);
return true;
}
return false;
return false;
}
+//
+// Used by bitcode obfuscator to get a list of non local symbols from object file
+//
+bool getNonLocalSymbols(const uint8_t* fileContent, std::vector<const char*> &syms)
+{
+ if ( mach_o::relocatable::Parser<x86_64>::validFile(fileContent) ) {
+ return mach_o::relocatable::Parser<x86_64>::getNonLocalSymbols(fileContent, syms);
+ }
+ else if ( mach_o::relocatable::Parser<arm>::validFile(fileContent, false, 0) ) {
+ return mach_o::relocatable::Parser<arm>::getNonLocalSymbols(fileContent, syms);
+ }
+ else if ( mach_o::relocatable::Parser<x86>::validFile(fileContent, false, 0) ) {
+ return mach_o::relocatable::Parser<x86>::getNonLocalSymbols(fileContent, syms);
+ }
+ else if ( mach_o::relocatable::Parser<arm64>::validFile(fileContent, false, 0) ) {
+ return mach_o::relocatable::Parser<arm64>::getNonLocalSymbols(fileContent, syms);
+ }
+ return false;
+}
+
} // namespace relocatable
projects / apple / ld64.git / blobdiff