mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-16 11:30:51 +00:00
b6976af3cd
Summary: This supersedes http://reviews.llvm.org/D4010, hopefully properly dealing with the JIT case and also adds an actual test case. DwarfContext was basically already usable for the JIT (and back when we were overwriting ELF files it actually worked out of the box by accident), but in order to resolve relocations correctly it needs to know the load address of the section. Rather than trying to get this out of the ObjectFile or requiring the user to create a new ObjectFile just to get some debug info, this adds the capability to pass in that info directly. As part of this I separated out part of the LoadedObjectInfo struct from RuntimeDyld, since it is now required at a higher layer. Reviewers: lhames, echristo Reviewed By: echristo Subscribers: vtjnash, friss, rafael, llvm-commits Differential Revision: http://reviews.llvm.org/D6961 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237961 91177308-0d34-0410-b5e6-96231b3b80d8
507 lines
18 KiB
C++
507 lines
18 KiB
C++
//===- MachO.h - MachO object file implementation ---------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares the MachOObjectFile class, which implement the ObjectFile
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// interface for MachO files.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_OBJECT_MACHO_H
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#define LLVM_OBJECT_MACHO_H
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/Triple.h"
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#include "llvm/Object/ObjectFile.h"
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#include "llvm/Support/MachO.h"
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namespace llvm {
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namespace object {
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/// DiceRef - This is a value type class that represents a single
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/// data in code entry in the table in a Mach-O object file.
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class DiceRef {
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DataRefImpl DicePimpl;
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const ObjectFile *OwningObject;
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public:
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DiceRef() : OwningObject(nullptr) { }
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DiceRef(DataRefImpl DiceP, const ObjectFile *Owner);
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bool operator==(const DiceRef &Other) const;
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bool operator<(const DiceRef &Other) const;
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void moveNext();
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std::error_code getOffset(uint32_t &Result) const;
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std::error_code getLength(uint16_t &Result) const;
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std::error_code getKind(uint16_t &Result) const;
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DataRefImpl getRawDataRefImpl() const;
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const ObjectFile *getObjectFile() const;
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};
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typedef content_iterator<DiceRef> dice_iterator;
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/// ExportEntry encapsulates the current-state-of-the-walk used when doing a
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/// non-recursive walk of the trie data structure. This allows you to iterate
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/// across all exported symbols using:
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/// for (const llvm::object::ExportEntry &AnExport : Obj->exports()) {
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/// }
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class ExportEntry {
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public:
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ExportEntry(ArrayRef<uint8_t> Trie);
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StringRef name() const;
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uint64_t flags() const;
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uint64_t address() const;
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uint64_t other() const;
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StringRef otherName() const;
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uint32_t nodeOffset() const;
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bool operator==(const ExportEntry &) const;
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void moveNext();
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private:
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friend class MachOObjectFile;
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void moveToFirst();
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void moveToEnd();
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uint64_t readULEB128(const uint8_t *&p);
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void pushDownUntilBottom();
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void pushNode(uint64_t Offset);
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// Represents a node in the mach-o exports trie.
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struct NodeState {
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NodeState(const uint8_t *Ptr);
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const uint8_t *Start;
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const uint8_t *Current;
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uint64_t Flags;
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uint64_t Address;
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uint64_t Other;
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const char *ImportName;
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unsigned ChildCount;
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unsigned NextChildIndex;
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unsigned ParentStringLength;
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bool IsExportNode;
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};
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ArrayRef<uint8_t> Trie;
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SmallString<256> CumulativeString;
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SmallVector<NodeState, 16> Stack;
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bool Malformed;
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bool Done;
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};
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typedef content_iterator<ExportEntry> export_iterator;
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/// MachORebaseEntry encapsulates the current state in the decompression of
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/// rebasing opcodes. This allows you to iterate through the compressed table of
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/// rebasing using:
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/// for (const llvm::object::MachORebaseEntry &Entry : Obj->rebaseTable()) {
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/// }
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class MachORebaseEntry {
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public:
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MachORebaseEntry(ArrayRef<uint8_t> opcodes, bool is64Bit);
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uint32_t segmentIndex() const;
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uint64_t segmentOffset() const;
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StringRef typeName() const;
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bool operator==(const MachORebaseEntry &) const;
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void moveNext();
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private:
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friend class MachOObjectFile;
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void moveToFirst();
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void moveToEnd();
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uint64_t readULEB128();
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ArrayRef<uint8_t> Opcodes;
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const uint8_t *Ptr;
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uint64_t SegmentOffset;
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uint32_t SegmentIndex;
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uint64_t RemainingLoopCount;
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uint64_t AdvanceAmount;
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uint8_t RebaseType;
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uint8_t PointerSize;
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bool Malformed;
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bool Done;
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};
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typedef content_iterator<MachORebaseEntry> rebase_iterator;
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/// MachOBindEntry encapsulates the current state in the decompression of
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/// binding opcodes. This allows you to iterate through the compressed table of
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/// bindings using:
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/// for (const llvm::object::MachOBindEntry &Entry : Obj->bindTable()) {
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/// }
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class MachOBindEntry {
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public:
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enum class Kind { Regular, Lazy, Weak };
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MachOBindEntry(ArrayRef<uint8_t> Opcodes, bool is64Bit, MachOBindEntry::Kind);
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uint32_t segmentIndex() const;
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uint64_t segmentOffset() const;
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StringRef typeName() const;
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StringRef symbolName() const;
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uint32_t flags() const;
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int64_t addend() const;
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int ordinal() const;
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bool operator==(const MachOBindEntry &) const;
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void moveNext();
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private:
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friend class MachOObjectFile;
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void moveToFirst();
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void moveToEnd();
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uint64_t readULEB128();
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int64_t readSLEB128();
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ArrayRef<uint8_t> Opcodes;
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const uint8_t *Ptr;
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uint64_t SegmentOffset;
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uint32_t SegmentIndex;
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StringRef SymbolName;
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int Ordinal;
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uint32_t Flags;
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int64_t Addend;
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uint64_t RemainingLoopCount;
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uint64_t AdvanceAmount;
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uint8_t BindType;
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uint8_t PointerSize;
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Kind TableKind;
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bool Malformed;
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bool Done;
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};
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typedef content_iterator<MachOBindEntry> bind_iterator;
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class MachOObjectFile : public ObjectFile {
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public:
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struct LoadCommandInfo {
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const char *Ptr; // Where in memory the load command is.
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MachO::load_command C; // The command itself.
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};
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MachOObjectFile(MemoryBufferRef Object, bool IsLittleEndian, bool Is64Bits,
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std::error_code &EC);
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void moveSymbolNext(DataRefImpl &Symb) const override;
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std::error_code getSymbolName(DataRefImpl Symb,
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StringRef &Res) const override;
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// MachO specific.
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std::error_code getIndirectName(DataRefImpl Symb, StringRef &Res) const;
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unsigned getSectionType(SectionRef Sec) const;
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std::error_code getSymbolAddress(DataRefImpl Symb,
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uint64_t &Res) const override;
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std::error_code getSymbolAlignment(DataRefImpl Symb,
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uint32_t &Res) const override;
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std::error_code getSymbolSize(DataRefImpl Symb, uint64_t &Res) const override;
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std::error_code getSymbolType(DataRefImpl Symb,
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SymbolRef::Type &Res) const override;
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uint32_t getSymbolFlags(DataRefImpl Symb) const override;
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std::error_code getSymbolSection(DataRefImpl Symb,
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section_iterator &Res) const override;
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void moveSectionNext(DataRefImpl &Sec) const override;
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std::error_code getSectionName(DataRefImpl Sec,
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StringRef &Res) const override;
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uint64_t getSectionAddress(DataRefImpl Sec) const override;
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uint64_t getSectionSize(DataRefImpl Sec) const override;
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std::error_code getSectionContents(DataRefImpl Sec,
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StringRef &Res) const override;
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uint64_t getSectionAlignment(DataRefImpl Sec) const override;
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bool isSectionText(DataRefImpl Sec) const override;
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bool isSectionData(DataRefImpl Sec) const override;
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bool isSectionBSS(DataRefImpl Sec) const override;
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bool isSectionVirtual(DataRefImpl Sec) const override;
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bool sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb) const override;
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relocation_iterator section_rel_begin(DataRefImpl Sec) const override;
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relocation_iterator section_rel_end(DataRefImpl Sec) const override;
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void moveRelocationNext(DataRefImpl &Rel) const override;
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std::error_code getRelocationAddress(DataRefImpl Rel,
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uint64_t &Res) const override;
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std::error_code getRelocationOffset(DataRefImpl Rel,
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uint64_t &Res) const override;
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symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override;
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section_iterator getRelocationSection(DataRefImpl Rel) const override;
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std::error_code getRelocationType(DataRefImpl Rel,
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uint64_t &Res) const override;
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std::error_code
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getRelocationTypeName(DataRefImpl Rel,
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SmallVectorImpl<char> &Result) const override;
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std::error_code
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getRelocationValueString(DataRefImpl Rel,
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SmallVectorImpl<char> &Result) const override;
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std::error_code getRelocationHidden(DataRefImpl Rel,
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bool &Result) const override;
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// MachO specific.
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std::error_code getLibraryShortNameByIndex(unsigned Index, StringRef &) const;
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// TODO: Would be useful to have an iterator based version
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// of the load command interface too.
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basic_symbol_iterator symbol_begin_impl() const override;
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basic_symbol_iterator symbol_end_impl() const override;
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// MachO specific.
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basic_symbol_iterator getSymbolByIndex(unsigned Index) const;
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section_iterator section_begin() const override;
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section_iterator section_end() const override;
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uint8_t getBytesInAddress() const override;
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StringRef getFileFormatName() const override;
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unsigned getArch() const override;
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Triple getArch(const char **McpuDefault, Triple *ThumbTriple) const;
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relocation_iterator section_rel_begin(unsigned Index) const;
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relocation_iterator section_rel_end(unsigned Index) const;
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dice_iterator begin_dices() const;
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dice_iterator end_dices() const;
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/// For use iterating over all exported symbols.
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iterator_range<export_iterator> exports() const;
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/// For use examining a trie not in a MachOObjectFile.
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static iterator_range<export_iterator> exports(ArrayRef<uint8_t> Trie);
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/// For use iterating over all rebase table entries.
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iterator_range<rebase_iterator> rebaseTable() const;
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/// For use examining rebase opcodes not in a MachOObjectFile.
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static iterator_range<rebase_iterator> rebaseTable(ArrayRef<uint8_t> Opcodes,
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bool is64);
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/// For use iterating over all bind table entries.
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iterator_range<bind_iterator> bindTable() const;
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/// For use iterating over all lazy bind table entries.
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iterator_range<bind_iterator> lazyBindTable() const;
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/// For use iterating over all lazy bind table entries.
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iterator_range<bind_iterator> weakBindTable() const;
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/// For use examining bind opcodes not in a MachOObjectFile.
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static iterator_range<bind_iterator> bindTable(ArrayRef<uint8_t> Opcodes,
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bool is64,
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MachOBindEntry::Kind);
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// In a MachO file, sections have a segment name. This is used in the .o
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// files. They have a single segment, but this field specifies which segment
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// a section should be put in in the final object.
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StringRef getSectionFinalSegmentName(DataRefImpl Sec) const;
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// Names are stored as 16 bytes. These returns the raw 16 bytes without
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// interpreting them as a C string.
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ArrayRef<char> getSectionRawName(DataRefImpl Sec) const;
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ArrayRef<char> getSectionRawFinalSegmentName(DataRefImpl Sec) const;
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// MachO specific Info about relocations.
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bool isRelocationScattered(const MachO::any_relocation_info &RE) const;
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unsigned getPlainRelocationSymbolNum(
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const MachO::any_relocation_info &RE) const;
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bool getPlainRelocationExternal(const MachO::any_relocation_info &RE) const;
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bool getScatteredRelocationScattered(
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const MachO::any_relocation_info &RE) const;
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uint32_t getScatteredRelocationValue(
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const MachO::any_relocation_info &RE) const;
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uint32_t getScatteredRelocationType(
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const MachO::any_relocation_info &RE) const;
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unsigned getAnyRelocationAddress(const MachO::any_relocation_info &RE) const;
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unsigned getAnyRelocationPCRel(const MachO::any_relocation_info &RE) const;
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unsigned getAnyRelocationLength(const MachO::any_relocation_info &RE) const;
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unsigned getAnyRelocationType(const MachO::any_relocation_info &RE) const;
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SectionRef getAnyRelocationSection(const MachO::any_relocation_info &RE) const;
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// Walk load commands.
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LoadCommandInfo getFirstLoadCommandInfo() const;
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LoadCommandInfo getNextLoadCommandInfo(const LoadCommandInfo &L) const;
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// MachO specific structures.
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MachO::section getSection(DataRefImpl DRI) const;
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MachO::section_64 getSection64(DataRefImpl DRI) const;
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MachO::section getSection(const LoadCommandInfo &L, unsigned Index) const;
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MachO::section_64 getSection64(const LoadCommandInfo &L,unsigned Index) const;
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MachO::nlist getSymbolTableEntry(DataRefImpl DRI) const;
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MachO::nlist_64 getSymbol64TableEntry(DataRefImpl DRI) const;
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MachO::linkedit_data_command
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getLinkeditDataLoadCommand(const LoadCommandInfo &L) const;
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MachO::segment_command
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getSegmentLoadCommand(const LoadCommandInfo &L) const;
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MachO::segment_command_64
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getSegment64LoadCommand(const LoadCommandInfo &L) const;
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MachO::linker_option_command
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getLinkerOptionLoadCommand(const LoadCommandInfo &L) const;
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MachO::version_min_command
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getVersionMinLoadCommand(const LoadCommandInfo &L) const;
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MachO::dylib_command
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getDylibIDLoadCommand(const LoadCommandInfo &L) const;
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MachO::dyld_info_command
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getDyldInfoLoadCommand(const LoadCommandInfo &L) const;
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MachO::dylinker_command
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getDylinkerCommand(const LoadCommandInfo &L) const;
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MachO::uuid_command
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getUuidCommand(const LoadCommandInfo &L) const;
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MachO::rpath_command
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getRpathCommand(const LoadCommandInfo &L) const;
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MachO::source_version_command
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getSourceVersionCommand(const LoadCommandInfo &L) const;
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MachO::entry_point_command
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getEntryPointCommand(const LoadCommandInfo &L) const;
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MachO::encryption_info_command
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getEncryptionInfoCommand(const LoadCommandInfo &L) const;
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MachO::encryption_info_command_64
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getEncryptionInfoCommand64(const LoadCommandInfo &L) const;
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MachO::sub_framework_command
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getSubFrameworkCommand(const LoadCommandInfo &L) const;
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MachO::sub_umbrella_command
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getSubUmbrellaCommand(const LoadCommandInfo &L) const;
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MachO::sub_library_command
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getSubLibraryCommand(const LoadCommandInfo &L) const;
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MachO::sub_client_command
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getSubClientCommand(const LoadCommandInfo &L) const;
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MachO::routines_command
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getRoutinesCommand(const LoadCommandInfo &L) const;
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MachO::routines_command_64
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getRoutinesCommand64(const LoadCommandInfo &L) const;
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MachO::thread_command
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getThreadCommand(const LoadCommandInfo &L) const;
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MachO::any_relocation_info getRelocation(DataRefImpl Rel) const;
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MachO::data_in_code_entry getDice(DataRefImpl Rel) const;
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MachO::mach_header getHeader() const;
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MachO::mach_header_64 getHeader64() const;
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uint32_t
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getIndirectSymbolTableEntry(const MachO::dysymtab_command &DLC,
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unsigned Index) const;
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MachO::data_in_code_entry getDataInCodeTableEntry(uint32_t DataOffset,
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unsigned Index) const;
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MachO::symtab_command getSymtabLoadCommand() const;
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MachO::dysymtab_command getDysymtabLoadCommand() const;
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MachO::linkedit_data_command getDataInCodeLoadCommand() const;
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MachO::linkedit_data_command getLinkOptHintsLoadCommand() const;
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ArrayRef<uint8_t> getDyldInfoRebaseOpcodes() const;
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ArrayRef<uint8_t> getDyldInfoBindOpcodes() const;
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ArrayRef<uint8_t> getDyldInfoWeakBindOpcodes() const;
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ArrayRef<uint8_t> getDyldInfoLazyBindOpcodes() const;
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ArrayRef<uint8_t> getDyldInfoExportsTrie() const;
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ArrayRef<uint8_t> getUuid() const;
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StringRef getStringTableData() const;
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bool is64Bit() const;
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void ReadULEB128s(uint64_t Index, SmallVectorImpl<uint64_t> &Out) const;
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static StringRef guessLibraryShortName(StringRef Name, bool &isFramework,
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StringRef &Suffix);
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static Triple::ArchType getArch(uint32_t CPUType);
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static Triple getArch(uint32_t CPUType, uint32_t CPUSubType,
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const char **McpuDefault = nullptr);
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static Triple getThumbArch(uint32_t CPUType, uint32_t CPUSubType,
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const char **McpuDefault = nullptr);
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static Triple getArch(uint32_t CPUType, uint32_t CPUSubType,
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const char **McpuDefault, Triple *ThumbTriple);
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static bool isValidArch(StringRef ArchFlag);
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static Triple getHostArch();
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bool isRelocatableObject() const override;
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bool hasPageZeroSegment() const { return HasPageZeroSegment; }
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static bool classof(const Binary *v) {
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return v->isMachO();
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}
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private:
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typedef SmallVector<const char*, 1> SectionList;
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SectionList Sections;
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typedef SmallVector<const char*, 1> LibraryList;
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LibraryList Libraries;
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typedef SmallVector<StringRef, 1> LibraryShortName;
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mutable LibraryShortName LibrariesShortNames;
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const char *SymtabLoadCmd;
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const char *DysymtabLoadCmd;
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const char *DataInCodeLoadCmd;
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const char *LinkOptHintsLoadCmd;
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const char *DyldInfoLoadCmd;
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const char *UuidLoadCmd;
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bool HasPageZeroSegment;
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};
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/// DiceRef
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inline DiceRef::DiceRef(DataRefImpl DiceP, const ObjectFile *Owner)
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: DicePimpl(DiceP) , OwningObject(Owner) {}
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inline bool DiceRef::operator==(const DiceRef &Other) const {
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return DicePimpl == Other.DicePimpl;
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}
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inline bool DiceRef::operator<(const DiceRef &Other) const {
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return DicePimpl < Other.DicePimpl;
|
|
}
|
|
|
|
inline void DiceRef::moveNext() {
|
|
const MachO::data_in_code_entry *P =
|
|
reinterpret_cast<const MachO::data_in_code_entry *>(DicePimpl.p);
|
|
DicePimpl.p = reinterpret_cast<uintptr_t>(P + 1);
|
|
}
|
|
|
|
// Since a Mach-O data in code reference, a DiceRef, can only be created when
|
|
// the OwningObject ObjectFile is a MachOObjectFile a static_cast<> is used for
|
|
// the methods that get the values of the fields of the reference.
|
|
|
|
inline std::error_code DiceRef::getOffset(uint32_t &Result) const {
|
|
const MachOObjectFile *MachOOF =
|
|
static_cast<const MachOObjectFile *>(OwningObject);
|
|
MachO::data_in_code_entry Dice = MachOOF->getDice(DicePimpl);
|
|
Result = Dice.offset;
|
|
return object_error::success;
|
|
}
|
|
|
|
inline std::error_code DiceRef::getLength(uint16_t &Result) const {
|
|
const MachOObjectFile *MachOOF =
|
|
static_cast<const MachOObjectFile *>(OwningObject);
|
|
MachO::data_in_code_entry Dice = MachOOF->getDice(DicePimpl);
|
|
Result = Dice.length;
|
|
return object_error::success;
|
|
}
|
|
|
|
inline std::error_code DiceRef::getKind(uint16_t &Result) const {
|
|
const MachOObjectFile *MachOOF =
|
|
static_cast<const MachOObjectFile *>(OwningObject);
|
|
MachO::data_in_code_entry Dice = MachOOF->getDice(DicePimpl);
|
|
Result = Dice.kind;
|
|
return object_error::success;
|
|
}
|
|
|
|
inline DataRefImpl DiceRef::getRawDataRefImpl() const {
|
|
return DicePimpl;
|
|
}
|
|
|
|
inline const ObjectFile *DiceRef::getObjectFile() const {
|
|
return OwningObject;
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|