mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-10-31 08:16:47 +00:00
24973c1063
in a subclass named DyldELFObject. This class supports rebasing the object file it represents by re-mapping section addresses to the actual memory addresses the object was placed in. This is required for MC-JIT implementation on ELF with debugging support. Patch reviewed on llvm-commits. Developed together with Ashok Thirumurthi and Andrew Kaylor. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148653 91177308-0d34-0410-b5e6-96231b3b80d8
528 lines
18 KiB
C++
528 lines
18 KiB
C++
//===- ObjectFile.h - File format independent object file -------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file declares a file format independent ObjectFile class.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_OBJECT_OBJECT_FILE_H
|
|
#define LLVM_OBJECT_OBJECT_FILE_H
|
|
|
|
#include "llvm/Object/Binary.h"
|
|
#include "llvm/ADT/StringRef.h"
|
|
#include "llvm/Support/DataTypes.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
#include "llvm/Support/MemoryBuffer.h"
|
|
#include <cstring>
|
|
#include <vector>
|
|
|
|
namespace llvm {
|
|
namespace object {
|
|
|
|
class ObjectFile;
|
|
|
|
union DataRefImpl {
|
|
struct {
|
|
// ELF needs this for relocations. This entire union should probably be a
|
|
// char[max(8, sizeof(uintptr_t))] and require the impl to cast.
|
|
uint16_t a, b;
|
|
uint32_t c;
|
|
} w;
|
|
struct {
|
|
uint32_t a, b;
|
|
} d;
|
|
uintptr_t p;
|
|
};
|
|
|
|
template<class content_type>
|
|
class content_iterator {
|
|
content_type Current;
|
|
public:
|
|
content_iterator(content_type symb)
|
|
: Current(symb) {}
|
|
|
|
const content_type* operator->() const {
|
|
return &Current;
|
|
}
|
|
|
|
const content_type &operator*() const {
|
|
return Current;
|
|
}
|
|
|
|
bool operator==(const content_iterator &other) const {
|
|
return Current == other.Current;
|
|
}
|
|
|
|
bool operator!=(const content_iterator &other) const {
|
|
return !(*this == other);
|
|
}
|
|
|
|
content_iterator& increment(error_code &err) {
|
|
content_type next;
|
|
if (error_code ec = Current.getNext(next))
|
|
err = ec;
|
|
else
|
|
Current = next;
|
|
return *this;
|
|
}
|
|
};
|
|
|
|
static bool operator ==(const DataRefImpl &a, const DataRefImpl &b) {
|
|
// Check bitwise identical. This is the only legal way to compare a union w/o
|
|
// knowing which member is in use.
|
|
return std::memcmp(&a, &b, sizeof(DataRefImpl)) == 0;
|
|
}
|
|
|
|
static bool operator <(const DataRefImpl &a, const DataRefImpl &b) {
|
|
// Check bitwise identical. This is the only legal way to compare a union w/o
|
|
// knowing which member is in use.
|
|
return std::memcmp(&a, &b, sizeof(DataRefImpl)) < 0;
|
|
}
|
|
|
|
class SymbolRef;
|
|
|
|
/// 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 getOffset(uint64_t &Result) const;
|
|
error_code getSymbol(SymbolRef &Result) const;
|
|
error_code getType(uint64_t &Result) const;
|
|
|
|
/// @brief Indicates whether this relocation should hidden when listing
|
|
/// relocations, usually because it is the trailing part of a multipart
|
|
/// relocation that will be printed as part of the leading relocation.
|
|
error_code getHidden(bool &Result) const;
|
|
|
|
/// @brief Get a string that represents the type of this relocation.
|
|
///
|
|
/// This is for display purposes only.
|
|
error_code getTypeName(SmallVectorImpl<char> &Result) const;
|
|
error_code getAdditionalInfo(int64_t &Result) const;
|
|
|
|
/// @brief Get a string that represents the calculation of the value of this
|
|
/// relocation.
|
|
///
|
|
/// This is for display purposes only.
|
|
error_code getValueString(SmallVectorImpl<char> &Result) const;
|
|
};
|
|
typedef content_iterator<RelocationRef> relocation_iterator;
|
|
|
|
/// SectionRef - This is a value type class that represents a single section in
|
|
/// the list of sections in the object file.
|
|
class SectionRef {
|
|
friend class SymbolRef;
|
|
DataRefImpl SectionPimpl;
|
|
const ObjectFile *OwningObject;
|
|
|
|
public:
|
|
SectionRef() : OwningObject(NULL) {
|
|
std::memset(&SectionPimpl, 0, sizeof(SectionPimpl));
|
|
}
|
|
|
|
SectionRef(DataRefImpl SectionP, const ObjectFile *Owner);
|
|
|
|
bool operator==(const SectionRef &Other) const;
|
|
bool operator <(const SectionRef &Other) const;
|
|
|
|
error_code getNext(SectionRef &Result) const;
|
|
|
|
error_code getName(StringRef &Result) const;
|
|
error_code getAddress(uint64_t &Result) const;
|
|
error_code getSize(uint64_t &Result) const;
|
|
error_code getContents(StringRef &Result) const;
|
|
|
|
/// @brief Get the alignment of this section as the actual value (not log 2).
|
|
error_code getAlignment(uint64_t &Result) const;
|
|
|
|
// FIXME: Move to the normalization layer when it's created.
|
|
error_code isText(bool &Result) const;
|
|
error_code isData(bool &Result) const;
|
|
error_code isBSS(bool &Result) const;
|
|
|
|
error_code containsSymbol(SymbolRef S, bool &Result) const;
|
|
|
|
relocation_iterator begin_relocations() const;
|
|
relocation_iterator end_relocations() const;
|
|
};
|
|
typedef content_iterator<SectionRef> section_iterator;
|
|
|
|
/// SymbolRef - This is a value type class that represents a single symbol in
|
|
/// the list of symbols in the object file.
|
|
class SymbolRef {
|
|
friend class SectionRef;
|
|
DataRefImpl SymbolPimpl;
|
|
const ObjectFile *OwningObject;
|
|
|
|
public:
|
|
SymbolRef() : OwningObject(NULL) {
|
|
std::memset(&SymbolPimpl, 0, sizeof(SymbolPimpl));
|
|
}
|
|
|
|
enum Type {
|
|
ST_Data,
|
|
ST_Debug,
|
|
ST_External, // Defined in another object file
|
|
ST_File,
|
|
ST_Function,
|
|
ST_Other
|
|
};
|
|
|
|
SymbolRef(DataRefImpl SymbolP, const ObjectFile *Owner);
|
|
|
|
bool operator==(const SymbolRef &Other) const;
|
|
bool operator <(const SymbolRef &Other) const;
|
|
|
|
error_code getNext(SymbolRef &Result) const;
|
|
|
|
error_code getName(StringRef &Result) const;
|
|
error_code getAddress(uint64_t &Result) const;
|
|
error_code getFileOffset(uint64_t &Result) const;
|
|
error_code getSize(uint64_t &Result) const;
|
|
error_code getType(SymbolRef::Type &Result) const;
|
|
|
|
/// Returns the ascii char that should be displayed in a symbol table dump via
|
|
/// nm for this symbol.
|
|
error_code getNMTypeChar(char &Result) const;
|
|
|
|
/// Returns true for symbols that are internal to the object file format such
|
|
/// as section symbols.
|
|
error_code isInternal(bool &Result) const;
|
|
|
|
/// Returns true for symbols that can be used in another objects,
|
|
/// such as library functions
|
|
error_code isGlobal(bool &Result) const;
|
|
|
|
/// Returns true for weak symbols.
|
|
error_code isWeak(bool &Result) const;
|
|
|
|
/// @brief Return true for absolute symbols.
|
|
error_code isAbsolute(bool &Result) const;
|
|
|
|
/// @brief Get section this symbol is defined in reference to. Result is
|
|
/// end_sections() if it is undefined or is an absolute symbol.
|
|
error_code getSection(section_iterator &Result) const;
|
|
|
|
DataRefImpl getRawDataRefImpl() const;
|
|
};
|
|
typedef content_iterator<SymbolRef> symbol_iterator;
|
|
|
|
const uint64_t UnknownAddressOrSize = ~0ULL;
|
|
|
|
/// ObjectFile - This class is the base class for all object file types.
|
|
/// Concrete instances of this object are created by createObjectFile, which
|
|
/// figure out which type to create.
|
|
class ObjectFile : public Binary {
|
|
virtual void anchor();
|
|
ObjectFile(); // = delete
|
|
ObjectFile(const ObjectFile &other); // = delete
|
|
|
|
protected:
|
|
ObjectFile(unsigned int Type, MemoryBuffer *source, error_code &ec);
|
|
|
|
const uint8_t *base() const {
|
|
return reinterpret_cast<const uint8_t *>(Data->getBufferStart());
|
|
}
|
|
|
|
// These functions are for SymbolRef to call internally. The main goal of
|
|
// this is to allow SymbolRef::SymbolPimpl to point directly to the symbol
|
|
// entry in the memory mapped object file. SymbolPimpl cannot contain any
|
|
// virtual functions because then it could not point into the memory mapped
|
|
// file.
|
|
//
|
|
// Implementations assume that the DataRefImpl is valid and has not been
|
|
// modified externally. It's UB otherwise.
|
|
friend class SymbolRef;
|
|
virtual error_code getSymbolNext(DataRefImpl Symb, SymbolRef &Res) const = 0;
|
|
virtual error_code getSymbolName(DataRefImpl Symb, StringRef &Res) const = 0;
|
|
virtual error_code getSymbolAddress(DataRefImpl Symb, uint64_t &Res) const =0;
|
|
virtual error_code getSymbolFileOffset(DataRefImpl Symb, uint64_t &Res) const =0;
|
|
virtual error_code getSymbolSize(DataRefImpl Symb, uint64_t &Res) const = 0;
|
|
virtual error_code getSymbolType(DataRefImpl Symb,
|
|
SymbolRef::Type &Res) const = 0;
|
|
virtual error_code getSymbolNMTypeChar(DataRefImpl Symb, char &Res) const = 0;
|
|
virtual error_code isSymbolInternal(DataRefImpl Symb, bool &Res) const = 0;
|
|
virtual error_code isSymbolGlobal(DataRefImpl Symb, bool &Res) const = 0;
|
|
virtual error_code isSymbolWeak(DataRefImpl Symb, bool &Res) const = 0;
|
|
virtual error_code isSymbolAbsolute(DataRefImpl Symb, bool &Res) const = 0;
|
|
virtual error_code getSymbolSection(DataRefImpl Symb,
|
|
section_iterator &Res) const = 0;
|
|
|
|
// Same as above for SectionRef.
|
|
friend class SectionRef;
|
|
virtual error_code getSectionNext(DataRefImpl Sec, SectionRef &Res) const = 0;
|
|
virtual error_code getSectionName(DataRefImpl Sec, StringRef &Res) const = 0;
|
|
virtual error_code getSectionAddress(DataRefImpl Sec, uint64_t &Res) const =0;
|
|
virtual error_code getSectionSize(DataRefImpl Sec, uint64_t &Res) const = 0;
|
|
virtual error_code getSectionContents(DataRefImpl Sec, StringRef &Res)const=0;
|
|
virtual error_code getSectionAlignment(DataRefImpl Sec, uint64_t &Res)const=0;
|
|
virtual error_code isSectionText(DataRefImpl Sec, bool &Res) const = 0;
|
|
virtual error_code isSectionData(DataRefImpl Sec, bool &Res) const = 0;
|
|
virtual error_code isSectionBSS(DataRefImpl Sec, bool &Res) const = 0;
|
|
virtual error_code sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb,
|
|
bool &Result) const = 0;
|
|
virtual relocation_iterator getSectionRelBegin(DataRefImpl Sec) const = 0;
|
|
virtual relocation_iterator getSectionRelEnd(DataRefImpl Sec) 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 getRelocationOffset(DataRefImpl Rel,
|
|
uint64_t &Res) const =0;
|
|
virtual error_code getRelocationSymbol(DataRefImpl Rel,
|
|
SymbolRef &Res) const = 0;
|
|
virtual error_code getRelocationType(DataRefImpl Rel,
|
|
uint64_t &Res) const = 0;
|
|
virtual error_code getRelocationTypeName(DataRefImpl Rel,
|
|
SmallVectorImpl<char> &Result) const = 0;
|
|
virtual error_code getRelocationAdditionalInfo(DataRefImpl Rel,
|
|
int64_t &Res) const = 0;
|
|
virtual error_code getRelocationValueString(DataRefImpl Rel,
|
|
SmallVectorImpl<char> &Result) const = 0;
|
|
virtual error_code getRelocationHidden(DataRefImpl Rel, bool &Result) const {
|
|
Result = false;
|
|
return object_error::success;
|
|
}
|
|
|
|
public:
|
|
|
|
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;
|
|
|
|
/// @brief The number of bytes used to represent an address in this object
|
|
/// file format.
|
|
virtual uint8_t getBytesInAddress() const = 0;
|
|
|
|
virtual StringRef getFileFormatName() const = 0;
|
|
virtual /* Triple::ArchType */ unsigned getArch() const = 0;
|
|
|
|
/// @returns Pointer to ObjectFile subclass to handle this type of object.
|
|
/// @param ObjectPath The path to the object file. ObjectPath.isObject must
|
|
/// return true.
|
|
/// @brief Create ObjectFile from path.
|
|
static ObjectFile *createObjectFile(StringRef ObjectPath);
|
|
static ObjectFile *createObjectFile(MemoryBuffer *Object);
|
|
|
|
static inline bool classof(const Binary *v) {
|
|
return v->getType() >= isObject &&
|
|
v->getType() < lastObject;
|
|
}
|
|
static inline bool classof(const ObjectFile *v) { return true; }
|
|
|
|
public:
|
|
static ObjectFile *createCOFFObjectFile(MemoryBuffer *Object);
|
|
static ObjectFile *createELFObjectFile(MemoryBuffer *Object,
|
|
bool doDyld = false, std::vector<uint8_t*> *MemoryMap = 0);
|
|
static ObjectFile *createMachOObjectFile(MemoryBuffer *Object);
|
|
};
|
|
|
|
// Inline function definitions.
|
|
inline SymbolRef::SymbolRef(DataRefImpl SymbolP, const ObjectFile *Owner)
|
|
: SymbolPimpl(SymbolP)
|
|
, OwningObject(Owner) {}
|
|
|
|
inline bool SymbolRef::operator==(const SymbolRef &Other) const {
|
|
return SymbolPimpl == Other.SymbolPimpl;
|
|
}
|
|
|
|
inline bool SymbolRef::operator <(const SymbolRef &Other) const {
|
|
return SymbolPimpl < Other.SymbolPimpl;
|
|
}
|
|
|
|
inline error_code SymbolRef::getNext(SymbolRef &Result) const {
|
|
return OwningObject->getSymbolNext(SymbolPimpl, Result);
|
|
}
|
|
|
|
inline error_code SymbolRef::getName(StringRef &Result) const {
|
|
return OwningObject->getSymbolName(SymbolPimpl, Result);
|
|
}
|
|
|
|
inline error_code SymbolRef::getAddress(uint64_t &Result) const {
|
|
return OwningObject->getSymbolAddress(SymbolPimpl, Result);
|
|
}
|
|
|
|
inline error_code SymbolRef::getFileOffset(uint64_t &Result) const {
|
|
return OwningObject->getSymbolFileOffset(SymbolPimpl, Result);
|
|
}
|
|
|
|
inline error_code SymbolRef::getSize(uint64_t &Result) const {
|
|
return OwningObject->getSymbolSize(SymbolPimpl, Result);
|
|
}
|
|
|
|
inline error_code SymbolRef::getNMTypeChar(char &Result) const {
|
|
return OwningObject->getSymbolNMTypeChar(SymbolPimpl, Result);
|
|
}
|
|
|
|
inline error_code SymbolRef::isInternal(bool &Result) const {
|
|
return OwningObject->isSymbolInternal(SymbolPimpl, Result);
|
|
}
|
|
|
|
inline error_code SymbolRef::isGlobal(bool &Result) const {
|
|
return OwningObject->isSymbolGlobal(SymbolPimpl, Result);
|
|
}
|
|
|
|
inline error_code SymbolRef::isWeak(bool &Result) const {
|
|
return OwningObject->isSymbolWeak(SymbolPimpl, Result);
|
|
}
|
|
|
|
inline error_code SymbolRef::isAbsolute(bool &Result) const {
|
|
return OwningObject->isSymbolAbsolute(SymbolPimpl, Result);
|
|
}
|
|
|
|
inline error_code SymbolRef::getSection(section_iterator &Result) const {
|
|
return OwningObject->getSymbolSection(SymbolPimpl, Result);
|
|
}
|
|
|
|
inline error_code SymbolRef::getType(SymbolRef::Type &Result) const {
|
|
return OwningObject->getSymbolType(SymbolPimpl, Result);
|
|
}
|
|
|
|
inline DataRefImpl SymbolRef::getRawDataRefImpl() const {
|
|
return SymbolPimpl;
|
|
}
|
|
|
|
|
|
/// SectionRef
|
|
inline SectionRef::SectionRef(DataRefImpl SectionP,
|
|
const ObjectFile *Owner)
|
|
: SectionPimpl(SectionP)
|
|
, OwningObject(Owner) {}
|
|
|
|
inline bool SectionRef::operator==(const SectionRef &Other) const {
|
|
return SectionPimpl == Other.SectionPimpl;
|
|
}
|
|
|
|
inline bool SectionRef::operator <(const SectionRef &Other) const {
|
|
return SectionPimpl < Other.SectionPimpl;
|
|
}
|
|
|
|
inline error_code SectionRef::getNext(SectionRef &Result) const {
|
|
return OwningObject->getSectionNext(SectionPimpl, Result);
|
|
}
|
|
|
|
inline error_code SectionRef::getName(StringRef &Result) const {
|
|
return OwningObject->getSectionName(SectionPimpl, Result);
|
|
}
|
|
|
|
inline error_code SectionRef::getAddress(uint64_t &Result) const {
|
|
return OwningObject->getSectionAddress(SectionPimpl, Result);
|
|
}
|
|
|
|
inline error_code SectionRef::getSize(uint64_t &Result) const {
|
|
return OwningObject->getSectionSize(SectionPimpl, Result);
|
|
}
|
|
|
|
inline error_code SectionRef::getContents(StringRef &Result) const {
|
|
return OwningObject->getSectionContents(SectionPimpl, Result);
|
|
}
|
|
|
|
inline error_code SectionRef::getAlignment(uint64_t &Result) const {
|
|
return OwningObject->getSectionAlignment(SectionPimpl, Result);
|
|
}
|
|
|
|
inline error_code SectionRef::isText(bool &Result) const {
|
|
return OwningObject->isSectionText(SectionPimpl, Result);
|
|
}
|
|
|
|
inline error_code SectionRef::isData(bool &Result) const {
|
|
return OwningObject->isSectionData(SectionPimpl, Result);
|
|
}
|
|
|
|
inline error_code SectionRef::isBSS(bool &Result) const {
|
|
return OwningObject->isSectionBSS(SectionPimpl, Result);
|
|
}
|
|
|
|
inline error_code SectionRef::containsSymbol(SymbolRef S, bool &Result) const {
|
|
return OwningObject->sectionContainsSymbol(SectionPimpl, S.SymbolPimpl,
|
|
Result);
|
|
}
|
|
|
|
inline relocation_iterator SectionRef::begin_relocations() const {
|
|
return OwningObject->getSectionRelBegin(SectionPimpl);
|
|
}
|
|
|
|
inline relocation_iterator SectionRef::end_relocations() const {
|
|
return OwningObject->getSectionRelEnd(SectionPimpl);
|
|
}
|
|
|
|
|
|
/// 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::getOffset(uint64_t &Result) const {
|
|
return OwningObject->getRelocationOffset(RelocationPimpl, Result);
|
|
}
|
|
|
|
inline error_code RelocationRef::getSymbol(SymbolRef &Result) const {
|
|
return OwningObject->getRelocationSymbol(RelocationPimpl, Result);
|
|
}
|
|
|
|
inline error_code RelocationRef::getType(uint64_t &Result) const {
|
|
return OwningObject->getRelocationType(RelocationPimpl, Result);
|
|
}
|
|
|
|
inline error_code RelocationRef::getTypeName(SmallVectorImpl<char> &Result)
|
|
const {
|
|
return OwningObject->getRelocationTypeName(RelocationPimpl, Result);
|
|
}
|
|
|
|
inline error_code RelocationRef::getAdditionalInfo(int64_t &Result) const {
|
|
return OwningObject->getRelocationAdditionalInfo(RelocationPimpl, Result);
|
|
}
|
|
|
|
inline error_code RelocationRef::getValueString(SmallVectorImpl<char> &Result)
|
|
const {
|
|
return OwningObject->getRelocationValueString(RelocationPimpl, Result);
|
|
}
|
|
|
|
inline error_code RelocationRef::getHidden(bool &Result) const {
|
|
return OwningObject->getRelocationHidden(RelocationPimpl, Result);
|
|
}
|
|
|
|
} // end namespace object
|
|
} // end namespace llvm
|
|
|
|
#endif
|