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35729bb1f8
to build out the symbol table as addresses are used, and implements
the mechanism for ELF to add stripped symbols from eh_frame.
Uses this mechanism to allow disassembly for addresses corresponding
to stripped symbols for ELF, and provide hooks to implement this for
PE COFF.
Also removes eSymbolContextTailCall in favor of an option for
ResolveSymbolContextForAddress for consistency with the documentation
for eSymbolContextEverything. Essentially, this is just an option for
interpreting the so_addr.
llvm-svn: 191307
337 lines
11 KiB
C++
337 lines
11 KiB
C++
//===-- ObjectFileELF.h --------------------------------------- -*- 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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#ifndef liblldb_ObjectFileELF_h_
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#define liblldb_ObjectFileELF_h_
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#include <stdint.h>
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#include <vector>
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#include "lldb/lldb-private.h"
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#include "lldb/Host/FileSpec.h"
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#include "lldb/Symbol/ObjectFile.h"
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#include "lldb/Core/UUID.h"
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#include "ELFHeader.h"
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//------------------------------------------------------------------------------
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/// @class ObjectFileELF
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/// @brief Generic ELF object file reader.
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///
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/// This class provides a generic ELF (32/64 bit) reader plugin implementing the
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/// ObjectFile protocol.
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class ObjectFileELF :
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public lldb_private::ObjectFile
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{
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public:
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//------------------------------------------------------------------
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// Static Functions
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//------------------------------------------------------------------
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static void
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Initialize();
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static void
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Terminate();
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static lldb_private::ConstString
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GetPluginNameStatic();
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static const char *
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GetPluginDescriptionStatic();
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static lldb_private::ObjectFile *
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CreateInstance(const lldb::ModuleSP &module_sp,
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lldb::DataBufferSP& data_sp,
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lldb::offset_t data_offset,
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const lldb_private::FileSpec* file,
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lldb::offset_t file_offset,
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lldb::offset_t length);
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static lldb_private::ObjectFile *
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CreateMemoryInstance (const lldb::ModuleSP &module_sp,
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lldb::DataBufferSP& data_sp,
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const lldb::ProcessSP &process_sp,
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lldb::addr_t header_addr);
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static size_t
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GetModuleSpecifications (const lldb_private::FileSpec& file,
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lldb::DataBufferSP& data_sp,
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lldb::offset_t data_offset,
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lldb::offset_t file_offset,
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lldb::offset_t length,
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lldb_private::ModuleSpecList &specs);
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static bool
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MagicBytesMatch (lldb::DataBufferSP& data_sp,
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lldb::addr_t offset,
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lldb::addr_t length);
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//------------------------------------------------------------------
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// PluginInterface protocol
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//------------------------------------------------------------------
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virtual lldb_private::ConstString
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GetPluginName();
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virtual uint32_t
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GetPluginVersion();
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//------------------------------------------------------------------
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// ObjectFile Protocol.
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//------------------------------------------------------------------
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virtual
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~ObjectFileELF();
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virtual bool
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ParseHeader();
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virtual lldb::ByteOrder
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GetByteOrder() const;
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virtual bool
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IsExecutable () const;
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virtual uint32_t
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GetAddressByteSize() const;
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virtual lldb_private::Symtab *
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GetSymtab();
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virtual lldb_private::Symbol *
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ResolveSymbolForAddress(const lldb_private::Address& so_addr, bool verify_unique);
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virtual bool
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IsStripped ();
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virtual void
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CreateSections (lldb_private::SectionList &unified_section_list);
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virtual void
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Dump(lldb_private::Stream *s);
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virtual bool
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GetArchitecture (lldb_private::ArchSpec &arch);
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virtual bool
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GetUUID(lldb_private::UUID* uuid);
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virtual lldb_private::FileSpecList
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GetDebugSymbolFilePaths();
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virtual uint32_t
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GetDependentModules(lldb_private::FileSpecList& files);
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virtual lldb_private::Address
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GetImageInfoAddress();
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virtual lldb_private::Address
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GetEntryPointAddress ();
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virtual ObjectFile::Type
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CalculateType();
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virtual ObjectFile::Strata
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CalculateStrata();
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// Returns number of program headers found in the ELF file.
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size_t
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GetProgramHeaderCount();
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// Returns the program header with the given index.
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const elf::ELFProgramHeader *
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GetProgramHeaderByIndex(lldb::user_id_t id);
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// Returns segment data for the given index.
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lldb_private::DataExtractor
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GetSegmentDataByIndex(lldb::user_id_t id);
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private:
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ObjectFileELF(const lldb::ModuleSP &module_sp,
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lldb::DataBufferSP& data_sp,
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lldb::offset_t data_offset,
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const lldb_private::FileSpec* file,
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lldb::offset_t offset,
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lldb::offset_t length);
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typedef std::vector<elf::ELFProgramHeader> ProgramHeaderColl;
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typedef ProgramHeaderColl::iterator ProgramHeaderCollIter;
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typedef ProgramHeaderColl::const_iterator ProgramHeaderCollConstIter;
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struct ELFSectionHeaderInfo : public elf::ELFSectionHeader
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{
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lldb_private::ConstString section_name;
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};
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typedef std::vector<ELFSectionHeaderInfo> SectionHeaderColl;
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typedef SectionHeaderColl::iterator SectionHeaderCollIter;
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typedef SectionHeaderColl::const_iterator SectionHeaderCollConstIter;
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typedef std::vector<elf::ELFDynamic> DynamicSymbolColl;
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typedef DynamicSymbolColl::iterator DynamicSymbolCollIter;
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typedef DynamicSymbolColl::const_iterator DynamicSymbolCollConstIter;
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/// Version of this reader common to all plugins based on this class.
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static const uint32_t m_plugin_version = 1;
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/// ELF file header.
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elf::ELFHeader m_header;
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/// ELF build ID.
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lldb_private::UUID m_uuid;
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/// ELF .gnu_debuglink file and crc data if available.
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std::string m_gnu_debuglink_file;
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uint32_t m_gnu_debuglink_crc;
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/// Collection of program headers.
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ProgramHeaderColl m_program_headers;
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/// Collection of section headers.
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SectionHeaderColl m_section_headers;
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/// Collection of symbols from the dynamic table.
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DynamicSymbolColl m_dynamic_symbols;
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/// List of file specifications corresponding to the modules (shared
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/// libraries) on which this object file depends.
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mutable std::unique_ptr<lldb_private::FileSpecList> m_filespec_ap;
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/// Cached value of the entry point for this module.
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lldb_private::Address m_entry_point_address;
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/// Returns a 1 based index of the given section header.
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size_t
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SectionIndex(const SectionHeaderCollIter &I);
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/// Returns a 1 based index of the given section header.
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size_t
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SectionIndex(const SectionHeaderCollConstIter &I) const;
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/// Parses all section headers present in this object file and populates
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/// m_program_headers. This method will compute the header list only once.
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/// Returns the number of headers parsed.
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size_t
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ParseProgramHeaders();
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/// Parses all section headers present in this object file and populates
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/// m_section_headers. This method will compute the header list only once.
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/// Returns the number of headers parsed.
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size_t
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ParseSectionHeaders();
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/// Parses the elf section headers and returns the uuid, debug link name, crc.
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static size_t
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GetSectionHeaderInfo(SectionHeaderColl §ion_headers,
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lldb_private::DataExtractor &data,
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const elf::ELFHeader &header,
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lldb_private::UUID &uuid,
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std::string &gnu_debuglink_file,
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uint32_t &gnu_debuglink_crc);
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/// Scans the dynamic section and locates all dependent modules (shared
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/// libraries) populating m_filespec_ap. This method will compute the
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/// dependent module list only once. Returns the number of dependent
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/// modules parsed.
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size_t
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ParseDependentModules();
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/// Parses the dynamic symbol table and populates m_dynamic_symbols. The
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/// vector retains the order as found in the object file. Returns the
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/// number of dynamic symbols parsed.
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size_t
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ParseDynamicSymbols();
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/// Populates m_symtab_ap will all non-dynamic linker symbols. This method
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/// will parse the symbols only once. Returns the number of symbols parsed.
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unsigned
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ParseSymbolTable(lldb_private::Symtab *symbol_table,
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lldb::user_id_t start_id,
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lldb_private::Section *symtab);
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/// Helper routine for ParseSymbolTable().
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unsigned
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ParseSymbols(lldb_private::Symtab *symbol_table,
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lldb::user_id_t start_id,
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lldb_private::SectionList *section_list,
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const size_t num_symbols,
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const lldb_private::DataExtractor &symtab_data,
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const lldb_private::DataExtractor &strtab_data);
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/// Scans the relocation entries and adds a set of artificial symbols to the
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/// given symbol table for each PLT slot. Returns the number of symbols
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/// added.
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unsigned
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ParseTrampolineSymbols(lldb_private::Symtab *symbol_table,
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lldb::user_id_t start_id,
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const ELFSectionHeaderInfo *rela_hdr,
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lldb::user_id_t section_id);
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/// Returns the section header with the given id or NULL.
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const ELFSectionHeaderInfo *
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GetSectionHeaderByIndex(lldb::user_id_t id);
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/// @name ELF header dump routines
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//@{
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static void
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DumpELFHeader(lldb_private::Stream *s, const elf::ELFHeader& header);
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static void
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DumpELFHeader_e_ident_EI_DATA(lldb_private::Stream *s,
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unsigned char ei_data);
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static void
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DumpELFHeader_e_type(lldb_private::Stream *s, elf::elf_half e_type);
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//@}
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/// @name ELF program header dump routines
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//@{
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void
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DumpELFProgramHeaders(lldb_private::Stream *s);
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static void
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DumpELFProgramHeader(lldb_private::Stream *s,
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const elf::ELFProgramHeader &ph);
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static void
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DumpELFProgramHeader_p_type(lldb_private::Stream *s, elf::elf_word p_type);
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static void
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DumpELFProgramHeader_p_flags(lldb_private::Stream *s,
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elf::elf_word p_flags);
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//@}
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/// @name ELF section header dump routines
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//@{
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void
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DumpELFSectionHeaders(lldb_private::Stream *s);
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static void
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DumpELFSectionHeader(lldb_private::Stream *s,
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const ELFSectionHeaderInfo& sh);
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static void
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DumpELFSectionHeader_sh_type(lldb_private::Stream *s,
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elf::elf_word sh_type);
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static void
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DumpELFSectionHeader_sh_flags(lldb_private::Stream *s,
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elf::elf_xword sh_flags);
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//@}
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/// ELF dependent module dump routine.
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void
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DumpDependentModules(lldb_private::Stream *s);
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const elf::ELFDynamic *
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FindDynamicSymbol(unsigned tag);
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unsigned
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PLTRelocationType();
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};
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#endif // #ifndef liblldb_ObjectFileELF_h_
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