tools/obj2yaml/coff2yaml.cpp

   1 //===------ utils/obj2yaml.cpp - obj2yaml conversion tool -------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "obj2yaml.h"
  11 #include "llvm/Object/COFF.h"
  12 #include "llvm/Object/COFFYAML.h"
  13 #include "llvm/Support/ErrorHandling.h"
  14 #include "llvm/Support/YAMLTraits.h"
  15
  16 using namespace llvm;
  17
  18 namespace {
  19
  20 class COFFDumper {
  21   const object::COFFObjectFile &Obj;
  22   COFFYAML::Object YAMLObj;
  23   void dumpHeader(const object::coff_file_header *Header);
  24   void dumpSections(unsigned numSections);
  25   void dumpSymbols(unsigned numSymbols);
  26
  27 public:
  28   COFFDumper(const object::COFFObjectFile &Obj);
  29   COFFYAML::Object &getYAMLObj();
  30 };
  31
  32 }
  33
  34 static void check(error_code ec) {
  35   if (ec)
  36     report_fatal_error(ec.message());
  37 }
  38
  39 COFFDumper::COFFDumper(const object::COFFObjectFile &Obj) : Obj(Obj) {
  40   const object::coff_file_header *Header;
  41   check(Obj.getHeader(Header));
  42   dumpHeader(Header);
  43   dumpSections(Header->NumberOfSections);
  44   dumpSymbols(Header->NumberOfSymbols);
  45 }
  46
  47 void COFFDumper::dumpHeader(const object::coff_file_header *Header) {
  48   YAMLObj.Header.Machine = Header->Machine;
  49   YAMLObj.Header.Characteristics = Header->Characteristics;
  50 }
  51
  52 void COFFDumper::dumpSections(unsigned NumSections) {
  53   std::vector<COFFYAML::Section> &Sections = YAMLObj.Sections;
  54   error_code ec;
  55   for (object::section_iterator iter = Obj.begin_sections();
  56        iter != Obj.end_sections(); iter.increment(ec)) {
  57     check(ec);
  58     const object::coff_section *Sect = Obj.getCOFFSection(iter);
  59     COFFYAML::Section Sec;
  60     Sec.Name = Sect->Name; // FIXME: check the null termination!
  61     uint32_t Characteristics = Sect->Characteristics;
  62     Sec.Header.Characteristics = Characteristics;
  63     Sec.Alignment = 1 << (((Characteristics >> 20) & 0xf) - 1);
  64
  65     ArrayRef<uint8_t> sectionData;
  66     Obj.getSectionContents(Sect, sectionData);
  67     Sec.SectionData = COFFYAML::BinaryRef(sectionData);
  68
  69     std::vector<COFF::relocation> Relocations;
  70     for (object::relocation_iterator rIter = iter->begin_relocations();
  71                        rIter != iter->end_relocations(); rIter.increment(ec)) {
  72       const object::coff_relocation *reloc = Obj.getCOFFRelocation(rIter);
  73       COFF::relocation Rel;
  74       Rel.VirtualAddress = reloc->VirtualAddress;
  75       Rel.SymbolTableIndex = reloc->SymbolTableIndex;
  76       Rel.Type = reloc->Type;
  77       Relocations.push_back(Rel);
  78     }
  79     Sec.Relocations = Relocations;
  80     Sections.push_back(Sec);
  81   }
  82 }
  83
  84 void COFFDumper::dumpSymbols(unsigned NumSymbols) {
  85   error_code ec;
  86   std::vector<COFFYAML::Symbol> &Symbols = YAMLObj.Symbols;
  87   for (object::symbol_iterator iter = Obj.begin_symbols();
  88        iter != Obj.end_symbols(); iter.increment(ec)) {
  89     check(ec);
  90     const object::coff_symbol *Symbol = Obj.getCOFFSymbol(iter);
  91     COFFYAML::Symbol Sym;
  92     Obj.getSymbolName(Symbol, Sym.Name);
  93     Sym.SimpleType = COFF::SymbolBaseType(Symbol->getBaseType());
  94     Sym.ComplexType = COFF::SymbolComplexType(Symbol->getComplexType());
  95     Sym.Header.StorageClass = Symbol->StorageClass;
  96     Sym.Header.Value = Symbol->Value;
  97     Sym.Header.SectionNumber = Symbol->SectionNumber;
  98     Sym.Header.NumberOfAuxSymbols = Symbol->NumberOfAuxSymbols;
  99     Sym.AuxiliaryData = COFFYAML::BinaryRef(Obj.getSymbolAuxData(Symbol));
 100     Symbols.push_back(Sym);
 101   }
 102 }
 103
 104 COFFYAML::Object &COFFDumper::getYAMLObj() {
 105   return YAMLObj;
 106 }
 107
 108 error_code coff2yaml(raw_ostream &Out, MemoryBuffer *Buff) {
 109   error_code ec;
 110   object::COFFObjectFile Obj(Buff, ec);
 111   check(ec);
 112   COFFDumper Dumper(Obj);
 113
 114   yaml::Output Yout(Out);
 115   Yout << Dumper.getYAMLObj();
 116
 117   return object::object_error::success;
 118 }