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llvm-project/lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.cpp

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//===-- ObjectFilePECOFF.cpp ------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "ObjectFilePECOFF.h"
#include "llvm/Support/MachO.h"
#include "lldb/Core/ArchSpec.h"
#include "lldb/Core/DataBuffer.h"
#include "lldb/Host/FileSpec.h"
#include "lldb/Core/FileSpecList.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/PluginManager.h"
#include "lldb/Core/Section.h"
#include "lldb/Core/StreamFile.h"
#include "lldb/Core/StreamString.h"
#include "lldb/Core/Timer.h"
#include "lldb/Core/UUID.h"
#include "lldb/Symbol/ObjectFile.h"
static uint32_t COFFMachineToMachCPU(uint16_t machine);
#define IMAGE_FILE_MACHINE_UNKNOWN 0x0000
#define IMAGE_FILE_MACHINE_AM33 0x01d3 // Matsushita AM33
#define IMAGE_FILE_MACHINE_AMD64 0x8664 // x64
#define IMAGE_FILE_MACHINE_ARM 0x01c0 // ARM little endian
#define IMAGE_FILE_MACHINE_EBC 0x0ebc // EFI byte code
#define IMAGE_FILE_MACHINE_I386 0x014c // Intel 386 or later processors and compatible processors
#define IMAGE_FILE_MACHINE_IA64 0x0200 // Intel Itanium processor family
#define IMAGE_FILE_MACHINE_M32R 0x9041 // Mitsubishi M32R little endian
#define IMAGE_FILE_MACHINE_MIPS16 0x0266 // MIPS16
#define IMAGE_FILE_MACHINE_MIPSFPU 0x0366 // MIPS with FPU
#define IMAGE_FILE_MACHINE_MIPSFPU16 0x0466 // MIPS16 with FPU
#define IMAGE_FILE_MACHINE_POWERPC 0x01f0 // Power PC little endian
#define IMAGE_FILE_MACHINE_POWERPCFP 0x01f1 // Power PC with floating point support
#define IMAGE_FILE_MACHINE_R4000 0x0166 // MIPS little endian
#define IMAGE_FILE_MACHINE_SH3 0x01a2 // Hitachi SH3
#define IMAGE_FILE_MACHINE_SH3DSP 0x01a3 // Hitachi SH3 DSP
#define IMAGE_FILE_MACHINE_SH4 0x01a6 // Hitachi SH4
#define IMAGE_FILE_MACHINE_SH5 0x01a8 // Hitachi SH5
#define IMAGE_FILE_MACHINE_THUMB 0x01c2 // Thumb
#define IMAGE_FILE_MACHINE_WCEMIPSV2 0x0169 // MIPS little-endian WCE v2
#define IMAGE_DOS_SIGNATURE 0x5A4D // MZ
#define IMAGE_OS2_SIGNATURE 0x454E // NE
#define IMAGE_OS2_SIGNATURE_LE 0x454C // LE
#define IMAGE_NT_SIGNATURE 0x00004550 // PE00
#define OPT_HEADER_MAGIC_PE32 0x010b
#define OPT_HEADER_MAGIC_PE32_PLUS 0x020b
#define IMAGE_FILE_RELOCS_STRIPPED 0x0001
#define IMAGE_FILE_EXECUTABLE_IMAGE 0x0002
#define IMAGE_FILE_LINE_NUMS_STRIPPED 0x0004
#define IMAGE_FILE_LOCAL_SYMS_STRIPPED 0x0008
#define IMAGE_FILE_AGGRESSIVE_WS_TRIM 0x0010
#define IMAGE_FILE_LARGE_ADDRESS_AWARE 0x0020
//#define 0x0040 // Reserved
#define IMAGE_FILE_BYTES_REVERSED_LO 0x0080
#define IMAGE_FILE_32BIT_MACHINE 0x0100
#define IMAGE_FILE_DEBUG_STRIPPED 0x0200
#define IMAGE_FILE_REMOVABLE_RUN_FROM_SWAP 0x0400
#define IMAGE_FILE_NET_RUN_FROM_SWAP 0x0800
#define IMAGE_FILE_SYSTEM 0x1000
#define IMAGE_FILE_DLL 0x2000
#define IMAGE_FILE_UP_SYSTEM_ONLY 0x4000
#define IMAGE_FILE_BYTES_REVERSED_HI 0x8000
// Section Flags
// The section flags in the Characteristics field of the section header indicate
// characteristics of the section.
#define IMAGE_SCN_TYPE_NO_PAD 0x00000008 // The section should not be padded to the next boundary. This flag is obsolete and is replaced by IMAGE_SCN_ALIGN_1BYTES. This is valid only for object files.
#define IMAGE_SCN_CNT_CODE 0x00000020 // The section contains executable code.
#define IMAGE_SCN_CNT_INITIALIZED_DATA 0x00000040 // The section contains initialized data.
#define IMAGE_SCN_CNT_UNINITIALIZED_DATA 0x00000080 // The section contains uninitialized data.
#define IMAGE_SCN_LNK_OTHER 0x00000100 // Reserved for future use.
#define IMAGE_SCN_LNK_INFO 0x00000200 // The section contains comments or other information. The .drectve section has this type. This is valid for object files only.
#define IMAGE_SCN_LNK_REMOVE 0x00000800 // The section will not become part of the image. This is valid only for object files.
#define IMAGE_SCN_LNK_COMDAT 0x00001000 // The section contains COMDAT data. For more information, see section 5.5.6, “COMDAT Sections (Object Only).” This is valid only for object files.
#define IMAGE_SCN_GPREL 0x00008000 // The section contains data referenced through the global pointer (GP).
#define IMAGE_SCN_MEM_PURGEABLE 0x00020000
#define IMAGE_SCN_MEM_16BIT 0x00020000 // For ARM machine types, the section contains Thumb code. Reserved for future use with other machine types.
#define IMAGE_SCN_MEM_LOCKED 0x00040000
#define IMAGE_SCN_MEM_PRELOAD 0x00080000
#define IMAGE_SCN_ALIGN_1BYTES 0x00100000 // Align data on a 1-byte boundary. Valid only for object files.
#define IMAGE_SCN_ALIGN_2BYTES 0x00200000 // Align data on a 2-byte boundary. Valid only for object files.
#define IMAGE_SCN_ALIGN_4BYTES 0x00300000 // Align data on a 4-byte boundary. Valid only for object files.
#define IMAGE_SCN_ALIGN_8BYTES 0x00400000 // Align data on an 8-byte boundary. Valid only for object files.
#define IMAGE_SCN_ALIGN_16BYTES 0x00500000 // Align data on a 16-byte boundary. Valid only for object files.
#define IMAGE_SCN_ALIGN_32BYTES 0x00600000 // Align data on a 32-byte boundary. Valid only for object files.
#define IMAGE_SCN_ALIGN_64BYTES 0x00700000 // Align data on a 64-byte boundary. Valid only for object files.
#define IMAGE_SCN_ALIGN_128BYTES 0x00800000 // Align data on a 128-byte boundary. Valid only for object files.
#define IMAGE_SCN_ALIGN_256BYTES 0x00900000 // Align data on a 256-byte boundary. Valid only for object files.
#define IMAGE_SCN_ALIGN_512BYTES 0x00A00000 // Align data on a 512-byte boundary. Valid only for object files.
#define IMAGE_SCN_ALIGN_1024BYTES 0x00B00000 // Align data on a 1024-byte boundary. Valid only for object files.
#define IMAGE_SCN_ALIGN_2048BYTES 0x00C00000 // Align data on a 2048-byte boundary. Valid only for object files.
#define IMAGE_SCN_ALIGN_4096BYTES 0x00D00000 // Align data on a 4096-byte boundary. Valid only for object files.
#define IMAGE_SCN_ALIGN_8192BYTES 0x00E00000 // Align data on an 8192-byte boundary. Valid only for object files.
#define IMAGE_SCN_LNK_NRELOC_OVFL 0x01000000 // The section contains extended relocations.
#define IMAGE_SCN_MEM_DISCARDABLE 0x02000000 // The section can be discarded as needed.
#define IMAGE_SCN_MEM_NOT_CACHED 0x04000000 // The section cannot be cached.
#define IMAGE_SCN_MEM_NOT_PAGED 0x08000000 // The section is not pageable.
#define IMAGE_SCN_MEM_SHARED 0x10000000 // The section can be shared in memory.
#define IMAGE_SCN_MEM_EXECUTE 0x20000000 // The section can be executed as code.
#define IMAGE_SCN_MEM_READ 0x40000000 // The section can be read.
#define IMAGE_SCN_MEM_WRITE 0x80000000 // The section can be written to.
using namespace lldb;
using namespace lldb_private;
void
ObjectFilePECOFF::Initialize()
{
PluginManager::RegisterPlugin (GetPluginNameStatic(),
GetPluginDescriptionStatic(),
CreateInstance,
CreateMemoryInstance);
}
void
ObjectFilePECOFF::Terminate()
{
PluginManager::UnregisterPlugin (CreateInstance);
}
const char *
ObjectFilePECOFF::GetPluginNameStatic()
{
return "object-file.pe-coff";
}
const char *
ObjectFilePECOFF::GetPluginDescriptionStatic()
{
return "Portable Executable and Common Object File Format object file reader (32 and 64 bit)";
}
ObjectFile *
ObjectFilePECOFF::CreateInstance (const lldb::ModuleSP &module_sp, DataBufferSP& dataSP, const FileSpec* file, addr_t offset, addr_t length)
{
if (ObjectFilePECOFF::MagicBytesMatch(dataSP))
{
std::auto_ptr<ObjectFile> objfile_ap(new ObjectFilePECOFF (module_sp, dataSP, file, offset, length));
if (objfile_ap.get() && objfile_ap->ParseHeader())
return objfile_ap.release();
}
return NULL;
}
ObjectFile *
ObjectFilePECOFF::CreateMemoryInstance (const lldb::ModuleSP &module_sp,
lldb::DataBufferSP& data_sp,
const lldb::ProcessSP &process_sp,
lldb::addr_t header_addr)
{
return NULL;
}
bool
ObjectFilePECOFF::MagicBytesMatch (DataBufferSP& dataSP)
{
DataExtractor data(dataSP, eByteOrderLittle, 4);
uint32_t offset = 0;
uint16_t magic = data.GetU16 (&offset);
return magic == IMAGE_DOS_SIGNATURE;
}
ObjectFilePECOFF::ObjectFilePECOFF (const lldb::ModuleSP &module_sp,
DataBufferSP& dataSP,
const FileSpec* file,
addr_t offset,
addr_t length) :
ObjectFile (module_sp, file, offset, length, dataSP),
m_dos_header (),
m_coff_header (),
m_coff_header_opt (),
m_sect_headers ()
{
::memset (&m_dos_header, 0, sizeof(m_dos_header));
::memset (&m_coff_header, 0, sizeof(m_coff_header));
::memset (&m_coff_header_opt, 0, sizeof(m_coff_header_opt));
}
ObjectFilePECOFF::~ObjectFilePECOFF()
{
}
bool
ObjectFilePECOFF::ParseHeader ()
{
ModuleSP module_sp(GetModule());
if (module_sp)
{
lldb_private::Mutex::Locker locker(module_sp->GetMutex());
m_sect_headers.clear();
m_data.SetByteOrder (eByteOrderLittle);
uint32_t offset = 0;
if (ParseDOSHeader())
{
offset = m_dos_header.e_lfanew;
uint32_t pe_signature = m_data.GetU32 (&offset);
if (pe_signature != IMAGE_NT_SIGNATURE)
return false;
if (ParseCOFFHeader(&offset))
{
if (m_coff_header.hdrsize > 0)
ParseCOFFOptionalHeader(&offset);
ParseSectionHeaders (offset);
}
StreamFile s(stdout, false);// REMOVE THIS LINE!!!
Dump(&s);// REMOVE THIS LINE!!!
return true;
}
}
return false;
}
ByteOrder
ObjectFilePECOFF::GetByteOrder () const
{
return eByteOrderLittle;
}
bool
ObjectFilePECOFF::IsExecutable() const
{
return (m_coff_header.flags & IMAGE_FILE_DLL) == 0;
}
size_t
ObjectFilePECOFF::GetAddressByteSize () const
{
if (m_coff_header_opt.magic == OPT_HEADER_MAGIC_PE32_PLUS)
return 8;
else if (m_coff_header_opt.magic == OPT_HEADER_MAGIC_PE32)
return 4;
return 4;
}
//----------------------------------------------------------------------
// NeedsEndianSwap
//
// Return true if an endian swap needs to occur when extracting data
// from this file.
//----------------------------------------------------------------------
bool
ObjectFilePECOFF::NeedsEndianSwap() const
{
#if defined(__LITTLE_ENDIAN__)
return false;
#else
return true;
#endif
}
//----------------------------------------------------------------------
// ParseDOSHeader
//----------------------------------------------------------------------
bool
ObjectFilePECOFF::ParseDOSHeader ()
{
bool success = false;
uint32_t offset = 0;
success = m_data.ValidOffsetForDataOfSize(0, sizeof(m_dos_header));
if (success)
{
m_dos_header.e_magic = m_data.GetU16(&offset); // Magic number
success = m_dos_header.e_magic == IMAGE_DOS_SIGNATURE;
if (success)
{
m_dos_header.e_cblp = m_data.GetU16(&offset); // Bytes on last page of file
m_dos_header.e_cp = m_data.GetU16(&offset); // Pages in file
m_dos_header.e_crlc = m_data.GetU16(&offset); // Relocations
m_dos_header.e_cparhdr = m_data.GetU16(&offset); // Size of header in paragraphs
m_dos_header.e_minalloc = m_data.GetU16(&offset); // Minimum extra paragraphs needed
m_dos_header.e_maxalloc = m_data.GetU16(&offset); // Maximum extra paragraphs needed
m_dos_header.e_ss = m_data.GetU16(&offset); // Initial (relative) SS value
m_dos_header.e_sp = m_data.GetU16(&offset); // Initial SP value
m_dos_header.e_csum = m_data.GetU16(&offset); // Checksum
m_dos_header.e_ip = m_data.GetU16(&offset); // Initial IP value
m_dos_header.e_cs = m_data.GetU16(&offset); // Initial (relative) CS value
m_dos_header.e_lfarlc = m_data.GetU16(&offset); // File address of relocation table
m_dos_header.e_ovno = m_data.GetU16(&offset); // Overlay number
m_dos_header.e_res[0] = m_data.GetU16(&offset); // Reserved words
m_dos_header.e_res[1] = m_data.GetU16(&offset); // Reserved words
m_dos_header.e_res[2] = m_data.GetU16(&offset); // Reserved words
m_dos_header.e_res[3] = m_data.GetU16(&offset); // Reserved words
m_dos_header.e_oemid = m_data.GetU16(&offset); // OEM identifier (for e_oeminfo)
m_dos_header.e_oeminfo = m_data.GetU16(&offset); // OEM information; e_oemid specific
m_dos_header.e_res2[0] = m_data.GetU16(&offset); // Reserved words
m_dos_header.e_res2[1] = m_data.GetU16(&offset); // Reserved words
m_dos_header.e_res2[2] = m_data.GetU16(&offset); // Reserved words
m_dos_header.e_res2[3] = m_data.GetU16(&offset); // Reserved words
m_dos_header.e_res2[4] = m_data.GetU16(&offset); // Reserved words
m_dos_header.e_res2[5] = m_data.GetU16(&offset); // Reserved words
m_dos_header.e_res2[6] = m_data.GetU16(&offset); // Reserved words
m_dos_header.e_res2[7] = m_data.GetU16(&offset); // Reserved words
m_dos_header.e_res2[8] = m_data.GetU16(&offset); // Reserved words
m_dos_header.e_res2[9] = m_data.GetU16(&offset); // Reserved words
m_dos_header.e_lfanew = m_data.GetU32(&offset); // File address of new exe header
}
}
if (!success)
memset(&m_dos_header, 0, sizeof(m_dos_header));
return success;
}
//----------------------------------------------------------------------
// ParserCOFFHeader
//----------------------------------------------------------------------
bool
ObjectFilePECOFF::ParseCOFFHeader(uint32_t* offset_ptr)
{
bool success = m_data.ValidOffsetForDataOfSize (*offset_ptr, sizeof(m_coff_header));
if (success)
{
m_coff_header.machine = m_data.GetU16(offset_ptr);
m_coff_header.nsects = m_data.GetU16(offset_ptr);
m_coff_header.modtime = m_data.GetU32(offset_ptr);
m_coff_header.symoff = m_data.GetU32(offset_ptr);
m_coff_header.nsyms = m_data.GetU32(offset_ptr);
m_coff_header.hdrsize = m_data.GetU16(offset_ptr);
m_coff_header.flags = m_data.GetU16(offset_ptr);
}
if (!success)
memset(&m_coff_header, 0, sizeof(m_coff_header));
return success;
}
bool
ObjectFilePECOFF::ParseCOFFOptionalHeader(uint32_t* offset_ptr)
{
bool success = false;
const uint32_t end_offset = *offset_ptr + m_coff_header.hdrsize;
if (*offset_ptr < end_offset)
{
success = true;
m_coff_header_opt.magic = m_data.GetU16(offset_ptr);
m_coff_header_opt.major_linker_version = m_data.GetU8 (offset_ptr);
m_coff_header_opt.minor_linker_version = m_data.GetU8 (offset_ptr);
m_coff_header_opt.code_size = m_data.GetU32(offset_ptr);
m_coff_header_opt.data_size = m_data.GetU32(offset_ptr);
m_coff_header_opt.bss_size = m_data.GetU32(offset_ptr);
m_coff_header_opt.entry = m_data.GetU32(offset_ptr);
m_coff_header_opt.code_offset = m_data.GetU32(offset_ptr);
const uint32_t addr_byte_size = GetAddressByteSize ();
if (*offset_ptr < end_offset)
{
if (m_coff_header_opt.magic == OPT_HEADER_MAGIC_PE32)
{
// PE32 only
m_coff_header_opt.data_offset = m_data.GetU32(offset_ptr);
}
else
m_coff_header_opt.data_offset = 0;
if (*offset_ptr < end_offset)
{
m_coff_header_opt.image_base = m_data.GetMaxU64 (offset_ptr, addr_byte_size);
m_coff_header_opt.sect_alignment = m_data.GetU32(offset_ptr);
m_coff_header_opt.file_alignment = m_data.GetU32(offset_ptr);
m_coff_header_opt.major_os_system_version = m_data.GetU16(offset_ptr);
m_coff_header_opt.minor_os_system_version = m_data.GetU16(offset_ptr);
m_coff_header_opt.major_image_version = m_data.GetU16(offset_ptr);
m_coff_header_opt.minor_image_version = m_data.GetU16(offset_ptr);
m_coff_header_opt.major_subsystem_version = m_data.GetU16(offset_ptr);
m_coff_header_opt.minor_subsystem_version = m_data.GetU16(offset_ptr);
m_coff_header_opt.reserved1 = m_data.GetU32(offset_ptr);
m_coff_header_opt.image_size = m_data.GetU32(offset_ptr);
m_coff_header_opt.header_size = m_data.GetU32(offset_ptr);
m_coff_header_opt.checksum = m_data.GetU32(offset_ptr);
m_coff_header_opt.subsystem = m_data.GetU16(offset_ptr);
m_coff_header_opt.dll_flags = m_data.GetU16(offset_ptr);
m_coff_header_opt.stack_reserve_size = m_data.GetMaxU64 (offset_ptr, addr_byte_size);
m_coff_header_opt.stack_commit_size = m_data.GetMaxU64 (offset_ptr, addr_byte_size);
m_coff_header_opt.heap_reserve_size = m_data.GetMaxU64 (offset_ptr, addr_byte_size);
m_coff_header_opt.heap_commit_size = m_data.GetMaxU64 (offset_ptr, addr_byte_size);
m_coff_header_opt.loader_flags = m_data.GetU32(offset_ptr);
uint32_t num_data_dir_entries = m_data.GetU32(offset_ptr);
m_coff_header_opt.data_dirs.clear();
m_coff_header_opt.data_dirs.resize(num_data_dir_entries);
uint32_t i;
for (i=0; i<num_data_dir_entries; i++)
{
m_coff_header_opt.data_dirs[i].vmaddr = m_data.GetU32(offset_ptr);
m_coff_header_opt.data_dirs[i].vmsize = m_data.GetU32(offset_ptr);
}
}
}
}
// Make sure we are on track for section data which follows
*offset_ptr = end_offset;
return success;
}
//----------------------------------------------------------------------
// ParseSectionHeaders
//----------------------------------------------------------------------
bool
ObjectFilePECOFF::ParseSectionHeaders (uint32_t section_header_data_offset)
{
const uint32_t nsects = m_coff_header.nsects;
m_sect_headers.clear();
if (nsects > 0)
{
const uint32_t addr_byte_size = GetAddressByteSize ();
const size_t section_header_byte_size = nsects * sizeof(section_header_t);
DataBufferSP section_header_data_sp(m_file.ReadFileContents (section_header_data_offset, section_header_byte_size));
DataExtractor section_header_data (section_header_data_sp, GetByteOrder(), addr_byte_size);
uint32_t offset = 0;
if (section_header_data.ValidOffsetForDataOfSize (offset, section_header_byte_size))
{
m_sect_headers.resize(nsects);
for (uint32_t idx = 0; idx<nsects; ++idx)
{
const void *name_data = section_header_data.GetData(&offset, 8);
if (name_data)
{
memcpy(m_sect_headers[idx].name, name_data, 8);
m_sect_headers[idx].vmsize = section_header_data.GetU32(&offset);
m_sect_headers[idx].vmaddr = section_header_data.GetU32(&offset);
m_sect_headers[idx].size = section_header_data.GetU32(&offset);
m_sect_headers[idx].offset = section_header_data.GetU32(&offset);
m_sect_headers[idx].reloff = section_header_data.GetU32(&offset);
m_sect_headers[idx].lineoff = section_header_data.GetU32(&offset);
m_sect_headers[idx].nreloc = section_header_data.GetU16(&offset);
m_sect_headers[idx].nline = section_header_data.GetU16(&offset);
m_sect_headers[idx].flags = section_header_data.GetU32(&offset);
}
}
}
}
return m_sect_headers.empty() == false;
}
bool
ObjectFilePECOFF::GetSectionName(std::string& sect_name, const section_header_t& sect)
{
if (sect.name[0] == '/')
{
uint32_t stroff = strtoul(&sect.name[1], NULL, 10);
uint32_t string_file_offset = m_coff_header.symoff + (m_coff_header.nsyms * 18) + stroff;
const char *name = m_data.GetCStr (&string_file_offset);
if (name)
{
sect_name = name;
return true;
}
return false;
}
sect_name = sect.name;
return true;
}
//----------------------------------------------------------------------
// GetNListSymtab
//----------------------------------------------------------------------
Symtab *
ObjectFilePECOFF::GetSymtab()
{
ModuleSP module_sp(GetModule());
if (module_sp)
{
lldb_private::Mutex::Locker locker(module_sp->GetMutex());
if (m_symtab_ap.get() == NULL)
{
SectionList *sect_list = GetSectionList();
m_symtab_ap.reset(new Symtab(this));
Mutex::Locker symtab_locker (m_symtab_ap->GetMutex());
const uint32_t num_syms = m_coff_header.nsyms;
if (num_syms > 0 && m_coff_header.symoff > 0)
{
const uint32_t symbol_size = sizeof(section_header_t);
const uint32_t addr_byte_size = GetAddressByteSize ();
const size_t symbol_data_size = num_syms * symbol_size;
// Include the 4 bytes string table size at the end of the symbols
DataBufferSP symtab_data_sp(m_file.ReadFileContents (m_coff_header.symoff, symbol_data_size + 4));
DataExtractor symtab_data (symtab_data_sp, GetByteOrder(), addr_byte_size);
uint32_t offset = symbol_data_size;
const uint32_t strtab_size = symtab_data.GetU32 (&offset);
DataBufferSP strtab_data_sp(m_file.ReadFileContents (m_coff_header.symoff + symbol_data_size + 4, strtab_size));
DataExtractor strtab_data (strtab_data_sp, GetByteOrder(), addr_byte_size);
offset = 0;
std::string symbol_name;
Symbol *symbols = m_symtab_ap->Resize (num_syms);
for (uint32_t i=0; i<num_syms; ++i)
{
coff_symbol_t symbol;
const uint32_t symbol_offset = offset;
const char *symbol_name_cstr = NULL;
// If the first 4 bytes of the symbol string are zero, then we
// it is followed by a 4 byte string table offset. Else these
// 8 bytes contain the symbol name
if (symtab_data.GetU32 (&offset) == 0)
{
// Long string that doesn't fit into the symbol table name,
// so now we must read the 4 byte string table offset
uint32_t strtab_offset = symtab_data.GetU32 (&offset);
symbol_name_cstr = strtab_data.PeekCStr (strtab_offset);
symbol_name.assign (symbol_name_cstr);
}
else
{
// Short string that fits into the symbol table name which is 8 bytes
offset += sizeof(symbol.name) - 4; // Skip remaining
symbol_name_cstr = symtab_data.PeekCStr (symbol_offset);
if (symbol_name_cstr == NULL)
break;
symbol_name.assign (symbol_name_cstr, sizeof(symbol.name));
}
symbol.value = symtab_data.GetU32 (&offset);
symbol.sect = symtab_data.GetU16 (&offset);
symbol.type = symtab_data.GetU16 (&offset);
symbol.storage = symtab_data.GetU8 (&offset);
symbol.naux = symtab_data.GetU8 (&offset);
Address symbol_addr(sect_list->GetSectionAtIndex(symbol.sect-1), symbol.value);
symbols[i].GetMangled ().SetValue (ConstString(symbol_name.c_str()));
symbols[i].GetAddress() = symbol_addr;
if (symbol.naux > 0)
i += symbol.naux;
}
}
}
}
return m_symtab_ap.get();
}
SectionList *
ObjectFilePECOFF::GetSectionList()
{
ModuleSP module_sp(GetModule());
if (module_sp)
{
lldb_private::Mutex::Locker locker(module_sp->GetMutex());
if (m_sections_ap.get() == NULL)
{
m_sections_ap.reset(new SectionList());
const uint32_t nsects = m_sect_headers.size();
ModuleSP module_sp (GetModule());
for (uint32_t idx = 0; idx<nsects; ++idx)
{
std::string sect_name;
GetSectionName (sect_name, m_sect_headers[idx]);
ConstString const_sect_name (sect_name.c_str());
static ConstString g_code_sect_name (".code");
static ConstString g_CODE_sect_name ("CODE");
static ConstString g_data_sect_name (".data");
static ConstString g_DATA_sect_name ("DATA");
static ConstString g_bss_sect_name (".bss");
static ConstString g_BSS_sect_name ("BSS");
static ConstString g_debug_sect_name (".debug");
static ConstString g_reloc_sect_name (".reloc");
static ConstString g_stab_sect_name (".stab");
static ConstString g_stabstr_sect_name (".stabstr");
SectionType section_type = eSectionTypeOther;
if (m_sect_headers[idx].flags & IMAGE_SCN_CNT_CODE &&
((const_sect_name == g_code_sect_name) || (const_sect_name == g_CODE_sect_name)))
{
section_type = eSectionTypeCode;
}
else if (m_sect_headers[idx].flags & IMAGE_SCN_CNT_INITIALIZED_DATA &&
((const_sect_name == g_data_sect_name) || (const_sect_name == g_DATA_sect_name)))
{
section_type = eSectionTypeData;
}
else if (m_sect_headers[idx].flags & IMAGE_SCN_CNT_UNINITIALIZED_DATA &&
((const_sect_name == g_bss_sect_name) || (const_sect_name == g_BSS_sect_name)))
{
if (m_sect_headers[idx].size == 0)
section_type = eSectionTypeZeroFill;
else
section_type = eSectionTypeData;
}
else if (const_sect_name == g_debug_sect_name)
{
section_type = eSectionTypeDebug;
}
else if (const_sect_name == g_stabstr_sect_name)
{
section_type = eSectionTypeDataCString;
}
else if (const_sect_name == g_reloc_sect_name)
{
section_type = eSectionTypeOther;
}
else if (m_sect_headers[idx].flags & IMAGE_SCN_CNT_CODE)
{
section_type = eSectionTypeCode;
}
else if (m_sect_headers[idx].flags & IMAGE_SCN_CNT_INITIALIZED_DATA)
{
section_type = eSectionTypeData;
}
else if (m_sect_headers[idx].flags & IMAGE_SCN_CNT_UNINITIALIZED_DATA)
{
if (m_sect_headers[idx].size == 0)
section_type = eSectionTypeZeroFill;
else
section_type = eSectionTypeData;
}
// Use a segment ID of the segment index shifted left by 8 so they
// never conflict with any of the sections.
SectionSP section_sp (new Section (module_sp, // Module to which this section belongs
idx + 1, // Section ID is the 1 based segment index shifted right by 8 bits as not to collide with any of the 256 section IDs that are possible
const_sect_name, // Name of this section
section_type, // This section is a container of other sections.
m_sect_headers[idx].vmaddr, // File VM address == addresses as they are found in the object file
m_sect_headers[idx].vmsize, // VM size in bytes of this section
m_sect_headers[idx].offset, // Offset to the data for this section in the file
m_sect_headers[idx].size, // Size in bytes of this section as found in the the file
m_sect_headers[idx].flags)); // Flags for this section
//section_sp->SetIsEncrypted (segment_is_encrypted);
m_sections_ap->AddSection(section_sp);
}
m_sections_ap->Finalize(); // Now that we're done adding sections, finalize to build fast-lookup caches
}
}
return m_sections_ap.get();
}
bool
ObjectFilePECOFF::GetUUID (UUID* uuid)
{
return false;
}
uint32_t
ObjectFilePECOFF::GetDependentModules (FileSpecList& files)
{
return 0;
}
//----------------------------------------------------------------------
// Dump
//
// Dump the specifics of the runtime file container (such as any headers
// segments, sections, etc).
//----------------------------------------------------------------------
void
ObjectFilePECOFF::Dump(Stream *s)
{
ModuleSP module_sp(GetModule());
if (module_sp)
{
lldb_private::Mutex::Locker locker(module_sp->GetMutex());
s->Printf("%p: ", this);
s->Indent();
s->PutCString("ObjectFilePECOFF");
ArchSpec header_arch;
GetArchitecture (header_arch);
*s << ", file = '" << m_file << "', arch = " << header_arch.GetArchitectureName() << "\n";
if (m_sections_ap.get())
m_sections_ap->Dump(s, NULL, true, UINT32_MAX);
if (m_symtab_ap.get())
m_symtab_ap->Dump(s, NULL, eSortOrderNone);
if (m_dos_header.e_magic)
DumpDOSHeader (s, m_dos_header);
if (m_coff_header.machine)
{
DumpCOFFHeader (s, m_coff_header);
if (m_coff_header.hdrsize)
DumpOptCOFFHeader (s, m_coff_header_opt);
}
s->EOL();
DumpSectionHeaders(s);
s->EOL();
}
}
//----------------------------------------------------------------------
// DumpDOSHeader
//
// Dump the MS-DOS header to the specified output stream
//----------------------------------------------------------------------
void
ObjectFilePECOFF::DumpDOSHeader(Stream *s, const dos_header_t& header)
{
s->PutCString ("MSDOS Header\n");
s->Printf (" e_magic = 0x%4.4x\n", header.e_magic);
s->Printf (" e_cblp = 0x%4.4x\n", header.e_cblp);
s->Printf (" e_cp = 0x%4.4x\n", header.e_cp);
s->Printf (" e_crlc = 0x%4.4x\n", header.e_crlc);
s->Printf (" e_cparhdr = 0x%4.4x\n", header.e_cparhdr);
s->Printf (" e_minalloc = 0x%4.4x\n", header.e_minalloc);
s->Printf (" e_maxalloc = 0x%4.4x\n", header.e_maxalloc);
s->Printf (" e_ss = 0x%4.4x\n", header.e_ss);
s->Printf (" e_sp = 0x%4.4x\n", header.e_sp);
s->Printf (" e_csum = 0x%4.4x\n", header.e_csum);
s->Printf (" e_ip = 0x%4.4x\n", header.e_ip);
s->Printf (" e_cs = 0x%4.4x\n", header.e_cs);
s->Printf (" e_lfarlc = 0x%4.4x\n", header.e_lfarlc);
s->Printf (" e_ovno = 0x%4.4x\n", header.e_ovno);
s->Printf (" e_res[4] = { 0x%4.4x, 0x%4.4x, 0x%4.4x, 0x%4.4x }\n",
header.e_res[0],
header.e_res[1],
header.e_res[2],
header.e_res[3]);
s->Printf (" e_oemid = 0x%4.4x\n", header.e_oemid);
s->Printf (" e_oeminfo = 0x%4.4x\n", header.e_oeminfo);
s->Printf (" e_res2[10] = { 0x%4.4x, 0x%4.4x, 0x%4.4x, 0x%4.4x, 0x%4.4x, 0x%4.4x, 0x%4.4x, 0x%4.4x, 0x%4.4x, 0x%4.4x }\n",
header.e_res2[0],
header.e_res2[1],
header.e_res2[2],
header.e_res2[3],
header.e_res2[4],
header.e_res2[5],
header.e_res2[6],
header.e_res2[7],
header.e_res2[8],
header.e_res2[9]);
s->Printf (" e_lfanew = 0x%8.8x\n", header.e_lfanew);
}
//----------------------------------------------------------------------
// DumpCOFFHeader
//
// Dump the COFF header to the specified output stream
//----------------------------------------------------------------------
void
ObjectFilePECOFF::DumpCOFFHeader(Stream *s, const coff_header_t& header)
{
s->PutCString ("COFF Header\n");
s->Printf (" machine = 0x%4.4x\n", header.machine);
s->Printf (" nsects = 0x%4.4x\n", header.nsects);
s->Printf (" modtime = 0x%8.8x\n", header.modtime);
s->Printf (" symoff = 0x%8.8x\n", header.symoff);
s->Printf (" nsyms = 0x%8.8x\n", header.nsyms);
s->Printf (" hdrsize = 0x%4.4x\n", header.hdrsize);
}
//----------------------------------------------------------------------
// DumpOptCOFFHeader
//
// Dump the optional COFF header to the specified output stream
//----------------------------------------------------------------------
void
ObjectFilePECOFF::DumpOptCOFFHeader(Stream *s, const coff_opt_header_t& header)
{
s->PutCString ("Optional COFF Header\n");
s->Printf (" magic = 0x%4.4x\n", header.magic);
s->Printf (" major_linker_version = 0x%2.2x\n", header.major_linker_version);
s->Printf (" minor_linker_version = 0x%2.2x\n", header.minor_linker_version);
s->Printf (" code_size = 0x%8.8x\n", header.code_size);
s->Printf (" data_size = 0x%8.8x\n", header.data_size);
s->Printf (" bss_size = 0x%8.8x\n", header.bss_size);
s->Printf (" entry = 0x%8.8x\n", header.entry);
s->Printf (" code_offset = 0x%8.8x\n", header.code_offset);
s->Printf (" data_offset = 0x%8.8x\n", header.data_offset);
s->Printf (" image_base = 0x%16.16llx\n", header.image_base);
s->Printf (" sect_alignment = 0x%8.8x\n", header.sect_alignment);
s->Printf (" file_alignment = 0x%8.8x\n", header.file_alignment);
s->Printf (" major_os_system_version = 0x%4.4x\n", header.major_os_system_version);
s->Printf (" minor_os_system_version = 0x%4.4x\n", header.minor_os_system_version);
s->Printf (" major_image_version = 0x%4.4x\n", header.major_image_version);
s->Printf (" minor_image_version = 0x%4.4x\n", header.minor_image_version);
s->Printf (" major_subsystem_version = 0x%4.4x\n", header.major_subsystem_version);
s->Printf (" minor_subsystem_version = 0x%4.4x\n", header.minor_subsystem_version);
s->Printf (" reserved1 = 0x%8.8x\n", header.reserved1);
s->Printf (" image_size = 0x%8.8x\n", header.image_size);
s->Printf (" header_size = 0x%8.8x\n", header.header_size);
s->Printf (" checksum = 0x%8.8x\n", header.checksum);
s->Printf (" subsystem = 0x%4.4x\n", header.subsystem);
s->Printf (" dll_flags = 0x%4.4x\n", header.dll_flags);
s->Printf (" stack_reserve_size = 0x%16.16llx\n", header.stack_reserve_size);
s->Printf (" stack_commit_size = 0x%16.16llx\n", header.stack_commit_size);
s->Printf (" heap_reserve_size = 0x%16.16llx\n", header.heap_reserve_size);
s->Printf (" heap_commit_size = 0x%16.16llx\n", header.heap_commit_size);
s->Printf (" loader_flags = 0x%8.8x\n", header.loader_flags);
s->Printf (" num_data_dir_entries = 0x%8.8zx\n", header.data_dirs.size());
uint32_t i;
for (i=0; i<header.data_dirs.size(); i++)
{
s->Printf (" data_dirs[%2u] vmaddr = 0x%8.8x, vmsize = 0x%8.8x\n",
i,
header.data_dirs[i].vmaddr,
header.data_dirs[i].vmsize);
}
}
//----------------------------------------------------------------------
// DumpSectionHeader
//
// Dump a single ELF section header to the specified output stream
//----------------------------------------------------------------------
void
ObjectFilePECOFF::DumpSectionHeader(Stream *s, const section_header_t& sh)
{
std::string name;
GetSectionName(name, sh);
s->Printf ("%-16s 0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x 0x%4.4x 0x%4.4x 0x%8.8x\n",
name.c_str(),
sh.vmaddr,
sh.vmsize,
sh.offset,
sh.size,
sh.reloff,
sh.lineoff,
sh.nreloc,
sh.nline,
sh.flags);
}
//----------------------------------------------------------------------
// DumpSectionHeaders
//
// Dump all of the ELF section header to the specified output stream
//----------------------------------------------------------------------
void
ObjectFilePECOFF::DumpSectionHeaders(Stream *s)
{
s->PutCString ("Section Headers\n");
s->PutCString ("IDX name vm addr vm size file off file size reloc off line off nreloc nline flags\n");
s->PutCString ("==== ---------------- ---------- ---------- ---------- ---------- ---------- ---------- ------ ------ ----------\n");
uint32_t idx = 0;
SectionHeaderCollIter pos, end = m_sect_headers.end();
for (pos = m_sect_headers.begin(); pos != end; ++pos, ++idx)
{
s->Printf ("[%2u] ", idx);
ObjectFilePECOFF::DumpSectionHeader(s, *pos);
}
}
static bool
COFFMachineToMachCPU (uint16_t machine, ArchSpec &arch)
{
switch (machine)
{
case IMAGE_FILE_MACHINE_AMD64:
case IMAGE_FILE_MACHINE_IA64:
arch.SetArchitecture (eArchTypeMachO,
llvm::MachO::CPUTypeX86_64,
llvm::MachO::CPUSubType_X86_64_ALL);
return true;
case IMAGE_FILE_MACHINE_I386:
arch.SetArchitecture (eArchTypeMachO,
llvm::MachO::CPUTypeI386,
llvm::MachO::CPUSubType_I386_ALL);
return true;
case IMAGE_FILE_MACHINE_POWERPC:
case IMAGE_FILE_MACHINE_POWERPCFP:
arch.SetArchitecture (eArchTypeMachO,
llvm::MachO::CPUTypePowerPC,
llvm::MachO::CPUSubType_POWERPC_ALL);
return true;
case IMAGE_FILE_MACHINE_ARM:
case IMAGE_FILE_MACHINE_THUMB:
arch.SetArchitecture (eArchTypeMachO,
llvm::MachO::CPUTypeARM,
llvm::MachO::CPUSubType_ARM_V7);
return true;
}
return false;
}
bool
ObjectFilePECOFF::GetArchitecture (ArchSpec &arch)
{
// For index zero return our cpu type
return COFFMachineToMachCPU (m_coff_header.machine, arch);
}
ObjectFile::Type
ObjectFilePECOFF::CalculateType()
{
if (m_coff_header.machine != 0)
{
if ((m_coff_header.flags & IMAGE_FILE_DLL) == 0)
return eTypeExecutable;
else
return eTypeSharedLibrary;
}
return eTypeExecutable;
}
ObjectFile::Strata
ObjectFilePECOFF::CalculateStrata()
{
return eStrataUser;
}
//------------------------------------------------------------------
// PluginInterface protocol
//------------------------------------------------------------------
const char *
ObjectFilePECOFF::GetPluginName()
{
return "ObjectFilePECOFF";
}
const char *
ObjectFilePECOFF::GetShortPluginName()
{
return GetPluginNameStatic();
}
uint32_t
ObjectFilePECOFF::GetPluginVersion()
{
return 1;
}
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