support::ulittle32_t Characteristics;
};
+struct coff_relocation {
+ support::ulittle32_t VirtualAddress;
+ support::ulittle32_t SymbolTableIndex;
+ support::ulittle16_t Type;
+};
+
class COFFObjectFile : public ObjectFile {
private:
const coff_file_header *Header;
const coff_symbol *toSymb(DataRefImpl Symb) const;
const coff_section *toSec(DataRefImpl Sec) const;
+ const coff_relocation *toRel(DataRefImpl Rel) const;
protected:
virtual error_code getSymbolNext(DataRefImpl Symb, SymbolRef &Res) const;
virtual error_code sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb,
bool &Result) const;
+ virtual error_code getRelocationNext(DataRefImpl Rel,
+ RelocationRef &Res) const;
+ virtual error_code getRelocationAddress(DataRefImpl Rel,
+ uint64_t &Res) const;
+ virtual error_code getRelocationSymbol(DataRefImpl Rel,
+ SymbolRef &Res) const;
+ virtual error_code getRelocationType(DataRefImpl Rel,
+ uint32_t &Res) const;
+ virtual error_code getRelocationAdditionalInfo(DataRefImpl Rel,
+ int64_t &Res) const;
public:
COFFObjectFile(MemoryBuffer *Object, error_code &ec);
virtual symbol_iterator begin_symbols() const;
virtual symbol_iterator end_symbols() const;
virtual section_iterator begin_sections() const;
virtual section_iterator end_sections() const;
+ virtual relocation_iterator begin_relocations() const;
+ virtual relocation_iterator end_relocations() const;
virtual uint8_t getBytesInAddress() const;
virtual StringRef getFileFormatName() const;
return std::memcmp(&a, &b, sizeof(DataRefImpl)) == 0;
}
-class RelocationRef {
- DataRefImpl RelocationPimpl;
- const ObjectFile *OwningObject;
-
-public:
- RelocationRef() : OwningObject(NULL) {
- std::memset(&RelocationPimpl, 0, sizeof(RelocationPimpl));
- }
-
- RelocationRef(DataRefImpl RelocationP, const ObjectFile *Owner);
-
- bool operator==(const RelocationRef &Other) const;
-
- error_code getNext(RelocationRef &Result);
-};
-
/// SymbolRef - This is a value type class that represents a single symbol in
/// the list of symbols in the object file.
class SymbolRef {
error_code isInternal(bool &Result) const;
};
+/// RelocationRef - This is a value type class that represents a single
+/// relocation in the list of relocations in the object file.
+class RelocationRef {
+ DataRefImpl RelocationPimpl;
+ const ObjectFile *OwningObject;
+
+public:
+ RelocationRef() : OwningObject(NULL) {
+ std::memset(&RelocationPimpl, 0, sizeof(RelocationPimpl));
+ }
+
+ RelocationRef(DataRefImpl RelocationP, const ObjectFile *Owner);
+
+ bool operator==(const RelocationRef &Other) const;
+
+ error_code getNext(RelocationRef &Result) const;
+
+ error_code getAddress(uint64_t &Result) const;
+ error_code getSymbol(SymbolRef &Result) const;
+ error_code getType(uint32_t &Result) const;
+ error_code getAdditionalInfo(int64_t &Result) const;
+};
+
/// SectionRef - This is a value type class that represents a single section in
/// the list of sections in the object file.
class SectionRef {
bool &Result) const = 0;
+ // Same as above for RelocationRef.
+ friend class RelocationRef;
+ virtual error_code getRelocationNext(DataRefImpl Rel,
+ RelocationRef &Res) const = 0;
+ virtual error_code getRelocationAddress(DataRefImpl Rel,
+ uint64_t &Res) const =0;
+ virtual error_code getRelocationSymbol(DataRefImpl Rel,
+ SymbolRef &Res) const = 0;
+ virtual error_code getRelocationType(DataRefImpl Rel,
+ uint32_t &Res) const = 0;
+ virtual error_code getRelocationAdditionalInfo(DataRefImpl Rel,
+ int64_t &Res) const = 0;
+
public:
template<class content_type>
class content_iterator {
typedef content_iterator<SymbolRef> symbol_iterator;
typedef content_iterator<SectionRef> section_iterator;
+ typedef content_iterator<RelocationRef> relocation_iterator;
virtual symbol_iterator begin_symbols() const = 0;
virtual symbol_iterator end_symbols() const = 0;
virtual section_iterator begin_sections() const = 0;
virtual section_iterator end_sections() const = 0;
+ virtual relocation_iterator begin_relocations() const = 0;
+ virtual relocation_iterator end_relocations() const = 0;
+
/// @brief The number of bytes used to represent an address in this object
/// file format.
virtual uint8_t getBytesInAddress() const = 0;
Result);
}
+
+/// RelocationRef
+inline RelocationRef::RelocationRef(DataRefImpl RelocationP,
+ const ObjectFile *Owner)
+ : RelocationPimpl(RelocationP)
+ , OwningObject(Owner) {}
+
+inline bool RelocationRef::operator==(const RelocationRef &Other) const {
+ return RelocationPimpl == Other.RelocationPimpl;
+}
+
+inline error_code RelocationRef::getNext(RelocationRef &Result) const {
+ return OwningObject->getRelocationNext(RelocationPimpl, Result);
+}
+
+inline error_code RelocationRef::getAddress(uint64_t &Result) const {
+ return OwningObject->getRelocationAddress(RelocationPimpl, Result);
+}
+
+inline error_code RelocationRef::getSymbol(SymbolRef &Result) const {
+ return OwningObject->getRelocationSymbol(RelocationPimpl, Result);
+}
+
+inline error_code RelocationRef::getType(uint32_t &Result) const {
+ return OwningObject->getRelocationType(RelocationPimpl, Result);
+}
+
+inline error_code RelocationRef::getAdditionalInfo(int64_t &Result) const {
+ return OwningObject->getRelocationAdditionalInfo(RelocationPimpl, Result);
+}
+
} // end namespace object
} // end namespace llvm
Header = reinterpret_cast<const coff_file_header *>(base() + HeaderStart);
if (!checkAddr(Data, ec, uintptr_t(Header), sizeof(coff_file_header)))
return;
-
+
SectionTable =
reinterpret_cast<const coff_section *>( base()
+ HeaderStart
ec = object_error::parse_failed;
return;
}
-
+
ec = object_error::success;
}
return object_error::success;
}
+const coff_relocation *COFFObjectFile::toRel(DataRefImpl Rel) const {
+ assert(Rel.d.b < Header->NumberOfSections && "Section index out of range!");
+ const coff_section *Sect;
+ getSection(Rel.d.b, Sect);
+ assert(Rel.d.a < Sect->NumberOfRelocations && "Relocation index out of range!");
+ return
+ reinterpret_cast<const coff_relocation*>(base() +
+ Sect->PointerToRelocations) +
+ Rel.d.a;
+}
+error_code COFFObjectFile::getRelocationNext(DataRefImpl Rel,
+ RelocationRef &Res) const {
+ const coff_section *Sect = NULL;
+ if (error_code ec = getSection(Rel.d.b, Sect))
+ return ec;
+ if (++Rel.d.a >= Sect->NumberOfRelocations) {
+ Rel.d.a = 0;
+ while (++Rel.d.b < Header->NumberOfSections) {
+ const coff_section *Sect;
+ getSection(Rel.d.b, Sect);
+ if (Sect->NumberOfRelocations > 0)
+ break;
+ }
+ }
+ Res = RelocationRef(Rel, this);
+ return object_error::success;
+}
+error_code COFFObjectFile::getRelocationAddress(DataRefImpl Rel,
+ uint64_t &Res) const {
+ const coff_section *Sect;
+ if (error_code ec = getSection(Rel.d.b, Sect))
+ return ec;
+ const coff_relocation* R = toRel(Rel);
+ Res = reinterpret_cast<uintptr_t>(base() +
+ Sect->PointerToRawData +
+ R->VirtualAddress);
+ return object_error::success;
+}
+error_code COFFObjectFile::getRelocationSymbol(DataRefImpl Rel,
+ SymbolRef &Res) const {
+ const coff_relocation* R = toRel(Rel);
+ DataRefImpl Symb;
+ Symb.p = reinterpret_cast<uintptr_t>(SymbolTable + R->SymbolTableIndex);
+ Res = SymbolRef(Symb, this);
+ return object_error::success;
+}
+error_code COFFObjectFile::getRelocationType(DataRefImpl Rel,
+ uint32_t &Res) const {
+ const coff_relocation* R = toRel(Rel);
+ Res = R->Type;
+ return object_error::success;
+}
+error_code COFFObjectFile::getRelocationAdditionalInfo(DataRefImpl Rel,
+ int64_t &Res) const {
+ Res = 0;
+ return object_error::success;
+}
+ObjectFile::relocation_iterator COFFObjectFile::begin_relocations() const {
+ DataRefImpl ret;
+ ret.d.a = 0;
+ ret.d.b = 1;
+ return relocation_iterator(RelocationRef(ret, this));
+}
+ObjectFile::relocation_iterator COFFObjectFile::end_relocations() const {
+ DataRefImpl ret;
+ ret.d.a = 0;
+ ret.d.b = Header->NumberOfSections;
+ return relocation_iterator(RelocationRef(ret, this));
+}
+
+
namespace llvm {
ObjectFile *ObjectFile::createCOFFObjectFile(MemoryBuffer *Object) {
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/ADT/Triple.h"
+#include "llvm/ADT/DenseMap.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Support/ELF.h"
#include "llvm/Support/Endian.h"
};
}
+namespace {
+template<support::endianness target_endianness, bool is64Bits, bool isRela>
+struct Elf_Rel_Base;
+
+template<support::endianness target_endianness>
+struct Elf_Rel_Base<target_endianness, false, false> {
+ LLVM_ELF_IMPORT_TYPES(target_endianness, false)
+ Elf_Addr r_offset; // Location (file byte offset, or program virtual addr)
+ Elf_Word r_info; // Symbol table index and type of relocation to apply
+};
+
+template<support::endianness target_endianness>
+struct Elf_Rel_Base<target_endianness, true, false> {
+ LLVM_ELF_IMPORT_TYPES(target_endianness, true)
+ Elf_Addr r_offset; // Location (file byte offset, or program virtual addr)
+ Elf_Xword r_info; // Symbol table index and type of relocation to apply
+};
+
+template<support::endianness target_endianness>
+struct Elf_Rel_Base<target_endianness, false, true> {
+ LLVM_ELF_IMPORT_TYPES(target_endianness, false)
+ Elf_Addr r_offset; // Location (file byte offset, or program virtual addr)
+ Elf_Word r_info; // Symbol table index and type of relocation to apply
+ Elf_Sword r_addend; // Compute value for relocatable field by adding this
+};
+
+template<support::endianness target_endianness>
+struct Elf_Rel_Base<target_endianness, true, true> {
+ LLVM_ELF_IMPORT_TYPES(target_endianness, true)
+ Elf_Addr r_offset; // Location (file byte offset, or program virtual addr)
+ Elf_Xword r_info; // Symbol table index and type of relocation to apply
+ Elf_Sxword r_addend; // Compute value for relocatable field by adding this.
+};
+
+template<support::endianness target_endianness, bool is64Bits, bool isRela>
+struct Elf_Rel_Impl;
+
+template<support::endianness target_endianness, bool isRela>
+struct Elf_Rel_Impl<target_endianness, true, isRela>
+ : Elf_Rel_Base<target_endianness, true, isRela> {
+ using Elf_Rel_Base<target_endianness, true, isRela>::r_info;
+ LLVM_ELF_IMPORT_TYPES(target_endianness, true)
+
+ // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE,
+ // and ELF64_R_INFO macros defined in the ELF specification:
+ uint64_t getSymbol() const { return (r_info >> 32); }
+ unsigned char getType() const {
+ return (unsigned char) (r_info & 0xffffffffL);
+ }
+ void setSymbol(uint64_t s) { setSymbolAndType(s, getType()); }
+ void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
+ void setSymbolAndType(uint64_t s, unsigned char t) {
+ r_info = (s << 32) + (t&0xffffffffL);
+ }
+};
+
+template<support::endianness target_endianness, bool isRela>
+struct Elf_Rel_Impl<target_endianness, false, isRela>
+ : Elf_Rel_Base<target_endianness, false, isRela> {
+ using Elf_Rel_Base<target_endianness, false, isRela>::r_info;
+ LLVM_ELF_IMPORT_TYPES(target_endianness, false)
+
+ // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
+ // and ELF32_R_INFO macros defined in the ELF specification:
+ uint32_t getSymbol() const { return (r_info >> 8); }
+ unsigned char getType() const { return (unsigned char) (r_info & 0x0ff); }
+ void setSymbol(uint32_t s) { setSymbolAndType(s, getType()); }
+ void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
+ void setSymbolAndType(uint32_t s, unsigned char t) {
+ r_info = (s << 8) + t;
+ }
+};
+
+}
+
namespace {
template<support::endianness target_endianness, bool is64Bits>
class ELFObjectFile : public ObjectFile {
typedef Elf_Shdr_Impl<target_endianness, is64Bits> Elf_Shdr;
typedef Elf_Sym_Impl<target_endianness, is64Bits> Elf_Sym;
+ typedef Elf_Rel_Impl<target_endianness, is64Bits, false> Elf_Rel;
+ typedef Elf_Rel_Impl<target_endianness, is64Bits, true> Elf_Rela;
struct Elf_Ehdr {
unsigned char e_ident[ELF::EI_NIDENT]; // ELF Identification bytes
unsigned char getDataEncoding() const { return e_ident[ELF::EI_DATA]; }
};
- typedef SmallVector<const Elf_Shdr*, 1> SymbolTableSections_t;
+ typedef SmallVector<const Elf_Shdr*, 1> Sections_t;
+ typedef DenseMap<unsigned, unsigned> IndexMap_t;
const Elf_Ehdr *Header;
const Elf_Shdr *SectionHeaderTable;
const Elf_Shdr *dot_shstrtab_sec; // Section header string table.
const Elf_Shdr *dot_strtab_sec; // Symbol header string table.
- SymbolTableSections_t SymbolTableSections;
+ Sections_t SymbolTableSections;
+ IndexMap_t SymbolTableSectionsIndexMap;
+ Sections_t RelocationTableSections;
void validateSymbol(DataRefImpl Symb) const;
+ bool isRelocationHasAddend(DataRefImpl Rel) const;
+ template<typename T>
+ const T *getEntry(DataRefImpl Entry, Sections_t Sections) const;
const Elf_Sym *getSymbol(DataRefImpl Symb) const;
const Elf_Shdr *getSection(DataRefImpl index) const;
const Elf_Shdr *getSection(uint16_t index) const;
+ const Elf_Rel *getRel(DataRefImpl Rel) const;
+ const Elf_Rela *getRela(DataRefImpl Rela) const;
const char *getString(uint16_t section, uint32_t offset) const;
const char *getString(const Elf_Shdr *section, uint32_t offset) const;
virtual error_code sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb,
bool &Result) const;
+ virtual error_code getRelocationNext(DataRefImpl Rel,
+ RelocationRef &Res) const;
+ virtual error_code getRelocationAddress(DataRefImpl Rel,
+ uint64_t &Res) const;
+ virtual error_code getRelocationSymbol(DataRefImpl Rel,
+ SymbolRef &Res) const;
+ virtual error_code getRelocationType(DataRefImpl Rel,
+ uint32_t &Res) const;
+ virtual error_code getRelocationAdditionalInfo(DataRefImpl Rel,
+ int64_t &Res) const;
+
public:
ELFObjectFile(MemoryBuffer *Object, error_code &ec);
virtual symbol_iterator begin_symbols() const;
virtual symbol_iterator end_symbols() const;
virtual section_iterator begin_sections() const;
virtual section_iterator end_sections() const;
+ virtual relocation_iterator begin_relocations() const;
+ virtual relocation_iterator end_relocations() const;
virtual uint8_t getBytesInAddress() const;
virtual StringRef getFileFormatName() const;
return ec;
Result = StringSwitch<char>(name)
.StartsWith(".debug", 'N')
- .StartsWith(".note", 'n');
+ .StartsWith(".note", 'n')
+ .Default('?');
return object_error::success;
}
return object_error::success;
}
+// Relocations
+template<support::endianness target_endianness, bool is64Bits>
+error_code ELFObjectFile<target_endianness, is64Bits>
+ ::getRelocationNext(DataRefImpl Rel,
+ RelocationRef &Result) const {
+ const Elf_Shdr *RelocationTableSection = RelocationTableSections[Rel.d.b];
+
+ // Check to see if we are at the end of this relocation table.
+ if (++Rel.d.a >= RelocationTableSection->getEntityCount()) {
+ // We are at the end. If there are other relocation tables, jump to them.
+ Rel.d.a = 0;
+ // Otherwise return the terminator.
+ if (++Rel.d.b >= SymbolTableSections.size()) {
+ Rel.d.a = std::numeric_limits<uint32_t>::max();
+ Rel.d.b = std::numeric_limits<uint32_t>::max();
+ }
+ }
+
+ Result = RelocationRef(Rel, this);
+ return object_error::success;
+}
+
+template<support::endianness target_endianness, bool is64Bits>
+error_code ELFObjectFile<target_endianness, is64Bits>
+ ::getRelocationSymbol(DataRefImpl Rel,
+ SymbolRef &Result) const {
+ uint32_t symbolIdx;
+ const Elf_Shdr *sec = RelocationTableSections[Rel.d.b];
+ switch (sec->sh_type) {
+ default :
+ report_fatal_error("Invalid section type in Rel!");
+ case ELF::SHT_REL : {
+ symbolIdx = getRel(Rel)->getSymbol();
+ break;
+ }
+ case ELF::SHT_RELA : {
+ symbolIdx = getRela(Rel)->getSymbol();
+ break;
+ }
+ }
+ DataRefImpl SymbolData;
+ IndexMap_t::const_iterator it = SymbolTableSectionsIndexMap.find(sec->sh_link);
+ if (it == SymbolTableSectionsIndexMap.end())
+ report_fatal_error("Relocation symbol table not found!");
+ SymbolData.d.a = symbolIdx;
+ SymbolData.d.b = it->second;
+ Result = SymbolRef(SymbolData, this);
+ return object_error::success;
+}
+
+template<support::endianness target_endianness, bool is64Bits>
+error_code ELFObjectFile<target_endianness, is64Bits>
+ ::getRelocationAddress(DataRefImpl Rel,
+ uint64_t &Result) const {
+ uint64_t offset;
+ const Elf_Shdr *sec = RelocationTableSections[Rel.d.b];
+ switch (sec->sh_type) {
+ default :
+ report_fatal_error("Invalid section type in Rel!");
+ case ELF::SHT_REL : {
+ offset = getRel(Rel)->r_offset;
+ break;
+ }
+ case ELF::SHT_RELA : {
+ offset = getRela(Rel)->r_offset;
+ break;
+ }
+ }
+
+ const Elf_Shdr *secAddr = getSection(sec->sh_info);
+ Result = offset + reinterpret_cast<uintptr_t>(base() + secAddr->sh_offset);
+ return object_error::success;
+}
+
+template<support::endianness target_endianness, bool is64Bits>
+error_code ELFObjectFile<target_endianness, is64Bits>
+ ::getRelocationType(DataRefImpl Rel,
+ uint32_t &Result) const {
+ const Elf_Shdr *sec = RelocationTableSections[Rel.d.b];
+ switch (sec->sh_type) {
+ default :
+ report_fatal_error("Invalid section type in Rel!");
+ case ELF::SHT_REL : {
+ Result = getRel(Rel)->getType();
+ break;
+ }
+ case ELF::SHT_RELA : {
+ Result = getRela(Rel)->getType();
+ break;
+ }
+ }
+ return object_error::success;
+}
+
+template<support::endianness target_endianness, bool is64Bits>
+error_code ELFObjectFile<target_endianness, is64Bits>
+ ::getRelocationAdditionalInfo(DataRefImpl Rel,
+ int64_t &Result) const {
+ const Elf_Shdr *sec = RelocationTableSections[Rel.d.b];
+ switch (sec->sh_type) {
+ default :
+ report_fatal_error("Invalid section type in Rel!");
+ case ELF::SHT_REL : {
+ Result = 0;
+ return object_error::success;
+ }
+ case ELF::SHT_RELA : {
+ Result = getRela(Rel)->r_addend;
+ return object_error::success;
+ }
+ }
+}
+
+
+
template<support::endianness target_endianness, bool is64Bits>
ELFObjectFile<target_endianness, is64Bits>::ELFObjectFile(MemoryBuffer *Object
, error_code &ec)
// To find the symbol tables we walk the section table to find SHT_STMTAB.
- for (const char *i = reinterpret_cast<const char *>(SectionHeaderTable),
- *e = i + Header->e_shnum * Header->e_shentsize;
- i != e; i += Header->e_shentsize) {
- const Elf_Shdr *sh = reinterpret_cast<const Elf_Shdr*>(i);
+ const Elf_Shdr* sh =
+ reinterpret_cast<const Elf_Shdr*>(SectionHeaderTable);
+ for (unsigned i = 0; i < Header->e_shnum; ++i) {
if (sh->sh_type == ELF::SHT_SYMTAB) {
+ SymbolTableSectionsIndexMap[i] = SymbolTableSections.size();
SymbolTableSections.push_back(sh);
}
+ if (sh->sh_type == ELF::SHT_REL || sh->sh_type == ELF::SHT_RELA) {
+ RelocationTableSections.push_back(sh);
+ }
+ ++sh;
}
// Get string table sections.
return section_iterator(SectionRef(ret, this));
}
+template<support::endianness target_endianness, bool is64Bits>
+ObjectFile::relocation_iterator ELFObjectFile<target_endianness, is64Bits>
+ ::begin_relocations() const {
+ DataRefImpl RelData;
+ memset(&RelData, 0, sizeof(RelData));
+ if (RelocationTableSections.size() == 0) {
+ RelData.d.a = std::numeric_limits<uint32_t>::max();
+ RelData.d.b = std::numeric_limits<uint32_t>::max();
+ } else {
+ RelData.d.a = 0;
+ RelData.d.b = 0;
+ }
+ return relocation_iterator(RelocationRef(RelData, this));
+}
+
+template<support::endianness target_endianness, bool is64Bits>
+ObjectFile::relocation_iterator ELFObjectFile<target_endianness, is64Bits>
+ ::end_relocations() const {
+ DataRefImpl RelData;
+ memset(&RelData, 0, sizeof(RelData));
+ RelData.d.a = std::numeric_limits<uint32_t>::max();
+ RelData.d.b = std::numeric_limits<uint32_t>::max();
+ return relocation_iterator(RelocationRef(RelData, this));
+}
+
template<support::endianness target_endianness, bool is64Bits>
uint8_t ELFObjectFile<target_endianness, is64Bits>::getBytesInAddress() const {
return is64Bits ? 8 : 4;
return "ELF32-i386";
case ELF::EM_X86_64:
return "ELF32-x86-64";
+ case ELF::EM_ARM:
+ return "ELF32-arm";
default:
return "ELF32-unknown";
}
return Triple::x86;
case ELF::EM_X86_64:
return Triple::x86_64;
+ case ELF::EM_ARM:
+ return Triple::arm;
default:
return Triple::UnknownArch;
}
}
template<support::endianness target_endianness, bool is64Bits>
-const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Sym *
-ELFObjectFile<target_endianness, is64Bits>::getSymbol(DataRefImpl Symb) const {
- const Elf_Shdr *sec = SymbolTableSections[Symb.d.b];
- return reinterpret_cast<const Elf_Sym *>(
+template<typename T>
+inline const T *
+ELFObjectFile<target_endianness, is64Bits>::getEntry(DataRefImpl Entry,
+ Sections_t Sections) const {
+ const Elf_Shdr *sec = Sections[Entry.d.b];
+ return reinterpret_cast<const T *>(
base()
+ sec->sh_offset
- + (Symb.d.a * sec->sh_entsize));
+ + (Entry.d.a * sec->sh_entsize));
+}
+
+template<support::endianness target_endianness, bool is64Bits>
+const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Sym *
+ELFObjectFile<target_endianness, is64Bits>::getSymbol(DataRefImpl Symb) const {
+ return getEntry<Elf_Sym>(Symb, SymbolTableSections);
+}
+
+template<support::endianness target_endianness, bool is64Bits>
+const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Rel *
+ELFObjectFile<target_endianness, is64Bits>::getRel(DataRefImpl Rel) const {
+ return getEntry<Elf_Rel>(Rel, RelocationTableSections);
+}
+
+template<support::endianness target_endianness, bool is64Bits>
+const typename ELFObjectFile<target_endianness, is64Bits>::Elf_Rela *
+ELFObjectFile<target_endianness, is64Bits>::getRela(DataRefImpl Rela) const {
+ return getEntry<Elf_Rela>(Rela, RelocationTableSections);
}
template<support::endianness target_endianness, bool is64Bits>
#include "llvm/Object/ObjectFile.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/MachO.h"
+#include "llvm/ADT/SmallVector.h"
#include <cctype>
#include <cstring>
class MachOObjectFile : public ObjectFile {
public:
- MachOObjectFile(MemoryBuffer *Object, MachOObject *MOO, error_code &ec)
- : ObjectFile(Binary::isMachO, Object, ec),
- MachOObj(MOO),
- RegisteredStringTable(std::numeric_limits<uint32_t>::max()) {}
+ MachOObjectFile(MemoryBuffer *Object, MachOObject *MOO, error_code &ec);
virtual symbol_iterator begin_symbols() const;
virtual symbol_iterator end_symbols() const;
virtual section_iterator begin_sections() const;
virtual section_iterator end_sections() const;
+ virtual relocation_iterator begin_relocations() const;
+ virtual relocation_iterator end_relocations() const;
virtual uint8_t getBytesInAddress() const;
virtual StringRef getFileFormatName() const;
virtual error_code sectionContainsSymbol(DataRefImpl DRI, DataRefImpl S,
bool &Result) const;
+ virtual error_code getRelocationNext(DataRefImpl Rel,
+ RelocationRef &Res) const;
+ virtual error_code getRelocationAddress(DataRefImpl Rel,
+ uint64_t &Res) const;
+ virtual error_code getRelocationSymbol(DataRefImpl Rel,
+ SymbolRef &Res) const;
+ virtual error_code getRelocationType(DataRefImpl Rel,
+ uint32_t &Res) const;
+ virtual error_code getRelocationAdditionalInfo(DataRefImpl Rel,
+ int64_t &Res) const;
private:
MachOObject *MachOObj;
mutable uint32_t RegisteredStringTable;
+ typedef SmallVector<DataRefImpl, 1> SectionList;
+ SectionList Sections;
+
void moveToNextSection(DataRefImpl &DRI) const;
void getSymbolTableEntry(DataRefImpl DRI,
void getSection(DataRefImpl DRI, InMemoryStruct<macho::Section> &Res) const;
void getSection64(DataRefImpl DRI,
InMemoryStruct<macho::Section64> &Res) const;
+ void getRelocation(DataRefImpl Rel,
+ InMemoryStruct<macho::RelocationEntry> &Res) const;
};
+MachOObjectFile::MachOObjectFile(MemoryBuffer *Object, MachOObject *MOO,
+ error_code &ec)
+ : ObjectFile(Binary::isMachO, Object, ec),
+ MachOObj(MOO),
+ RegisteredStringTable(std::numeric_limits<uint32_t>::max()) {
+ DataRefImpl DRI;
+ DRI.d.a = DRI.d.b = 0;
+ moveToNextSection(DRI);
+ uint32_t LoadCommandCount = MachOObj->getHeader().NumLoadCommands;
+ while (DRI.d.a < LoadCommandCount) {
+ Sections.push_back(DRI);
+ uint64_t Addr;
+ uint64_t Size;
+ StringRef Name;
+ getSectionAddress(DRI, Addr);
+ getSectionSize(DRI, Size);
+ getSectionName(DRI, Name);
+ InMemoryStruct<macho::Section> Sect;
+ getSection(DRI, Sect);
+ DRI.d.b++;
+ moveToNextSection(DRI);
+ }
+}
+
+
ObjectFile *ObjectFile::createMachOObjectFile(MemoryBuffer *Buffer) {
error_code ec;
std::string Err;
return section_iterator(SectionRef(DRI, this));
}
+/*===-- Relocations -------------------------------------------------------===*/
+
+void MachOObjectFile::
+getRelocation(DataRefImpl Rel,
+ InMemoryStruct<macho::RelocationEntry> &Res) const {
+ uint32_t relOffset;
+ if (MachOObj->is64Bit()) {
+ InMemoryStruct<macho::Section64> Sect;
+ getSection64(Sections[Rel.d.b], Sect);
+ relOffset = Sect->RelocationTableOffset;
+ } else {
+ InMemoryStruct<macho::Section> Sect;
+ getSection(Sections[Rel.d.b], Sect);
+ relOffset = Sect->RelocationTableOffset;
+ }
+ MachOObj->ReadRelocationEntry(relOffset, Rel.d.a, Res);
+}
+error_code MachOObjectFile::getRelocationNext(DataRefImpl Rel,
+ RelocationRef &Res) const {
+ ++Rel.d.a;
+ while (Rel.d.b < Sections.size()) {
+ unsigned relocationCount;
+ if (MachOObj->is64Bit()) {
+ InMemoryStruct<macho::Section64> Sect;
+ getSection64(Sections[Rel.d.b], Sect);
+ relocationCount = Sect->NumRelocationTableEntries;
+ } else {
+ InMemoryStruct<macho::Section> Sect;
+ getSection(Sections[Rel.d.b], Sect);
+ relocationCount = Sect->NumRelocationTableEntries;
+ }
+ if (Rel.d.a < relocationCount)
+ break;
+
+ Rel.d.a = 0;
+ ++Rel.d.b;
+ }
+ Res = RelocationRef(Rel, this);
+ return object_error::success;
+}
+error_code MachOObjectFile::getRelocationAddress(DataRefImpl Rel,
+ uint64_t &Res) const {
+ const uint8_t* sectAddress = base();
+ if (MachOObj->is64Bit()) {
+ InMemoryStruct<macho::Section64> Sect;
+ getSection64(Sections[Rel.d.b], Sect);
+ sectAddress += Sect->Offset;
+ } else {
+ InMemoryStruct<macho::Section> Sect;
+ getSection(Sections[Rel.d.b], Sect);
+ sectAddress += Sect->Offset;
+ }
+ InMemoryStruct<macho::RelocationEntry> RE;
+ getRelocation(Rel, RE);
+ Res = reinterpret_cast<uintptr_t>(sectAddress + RE->Word0);
+ return object_error::success;
+}
+error_code MachOObjectFile::getRelocationSymbol(DataRefImpl Rel,
+ SymbolRef &Res) const {
+ InMemoryStruct<macho::RelocationEntry> RE;
+ getRelocation(Rel, RE);
+ uint32_t SymbolIdx = RE->Word1 & 0xffffff;
+ bool isExtern = (RE->Word1 >> 27) & 1;
+
+ DataRefImpl Sym;
+ Sym.d.a = Sym.d.b = 0;
+ moveToNextSymbol(Sym);
+ uint32_t NumLoadCommands = MachOObj->getHeader().NumLoadCommands;
+ if (isExtern) {
+ for (unsigned i = 0; i < SymbolIdx; i++) {
+ Sym.d.b++;
+ moveToNextSymbol(Sym);
+ assert(Sym.d.a < NumLoadCommands &&
+ "Relocation symbol index out of range!");
+ }
+ }
+ Res = SymbolRef(Sym, this);
+ return object_error::success;
+}
+error_code MachOObjectFile::getRelocationType(DataRefImpl Rel,
+ uint32_t &Res) const {
+ InMemoryStruct<macho::RelocationEntry> RE;
+ getRelocation(Rel, RE);
+ Res = RE->Word1;
+ return object_error::success;
+}
+error_code MachOObjectFile::getRelocationAdditionalInfo(DataRefImpl Rel,
+ int64_t &Res) const {
+ InMemoryStruct<macho::RelocationEntry> RE;
+ getRelocation(Rel, RE);
+ bool isExtern = (RE->Word1 >> 27) & 1;
+ Res = 0;
+ if (!isExtern) {
+ const uint8_t* sectAddress = base();
+ if (MachOObj->is64Bit()) {
+ InMemoryStruct<macho::Section64> Sect;
+ getSection64(Sections[Rel.d.b], Sect);
+ sectAddress += Sect->Offset;
+ } else {
+ InMemoryStruct<macho::Section> Sect;
+ getSection(Sections[Rel.d.b], Sect);
+ sectAddress += Sect->Offset;
+ }
+ Res = reinterpret_cast<uintptr_t>(sectAddress);
+ }
+ return object_error::success;
+}
+ObjectFile::relocation_iterator MachOObjectFile::begin_relocations() const {
+ DataRefImpl ret;
+ ret.d.a = ret.d.b = 0;
+ return relocation_iterator(RelocationRef(ret, this));
+}
+ObjectFile::relocation_iterator MachOObjectFile::end_relocations() const {
+ DataRefImpl ret;
+ ret.d.a = 0;
+ ret.d.b = Sections.size();
+ return relocation_iterator(RelocationRef(ret, this));
+}
+
/*===-- Miscellaneous -----------------------------------------------------===*/
uint8_t MachOObjectFile::getBytesInAddress() const {
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