WinCOFFObjectWriter.cpp revision 96f498bd9f140a98321c478f517877c4767b94fa
1b162290e39afd49d4c7d342333b331bc96232720Chris Lattner//===-- llvm/MC/WinCOFFObjectWriter.cpp -------------------------*- C++ -*-===// 2b162290e39afd49d4c7d342333b331bc96232720Chris Lattner// 3b162290e39afd49d4c7d342333b331bc96232720Chris Lattner// The LLVM Compiler Infrastructure 4b162290e39afd49d4c7d342333b331bc96232720Chris Lattner// 5b162290e39afd49d4c7d342333b331bc96232720Chris Lattner// This file is distributed under the University of Illinois Open Source 6b162290e39afd49d4c7d342333b331bc96232720Chris Lattner// License. See LICENSE.TXT for details. 7b162290e39afd49d4c7d342333b331bc96232720Chris Lattner// 8b162290e39afd49d4c7d342333b331bc96232720Chris Lattner//===----------------------------------------------------------------------===// 9b162290e39afd49d4c7d342333b331bc96232720Chris Lattner// 10b162290e39afd49d4c7d342333b331bc96232720Chris Lattner// This file contains an implementation of a Win32 COFF object file writer. 11b162290e39afd49d4c7d342333b331bc96232720Chris Lattner// 12b162290e39afd49d4c7d342333b331bc96232720Chris Lattner//===----------------------------------------------------------------------===// 13b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 14b162290e39afd49d4c7d342333b331bc96232720Chris Lattner#define DEBUG_TYPE "WinCOFFObjectWriter" 15801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 16df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola#include "llvm/MC/MCWinCOFFObjectWriter.h" 17801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer#include "llvm/ADT/DenseMap.h" 18df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola#include "llvm/ADT/OwningPtr.h" 19801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer#include "llvm/ADT/StringMap.h" 20801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer#include "llvm/ADT/StringRef.h" 21d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "llvm/MC/MCAsmLayout.h" 22d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "llvm/MC/MCAssembler.h" 23d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "llvm/MC/MCContext.h" 24d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "llvm/MC/MCExpr.h" 25d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "llvm/MC/MCObjectWriter.h" 26d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "llvm/MC/MCSection.h" 27d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "llvm/MC/MCSectionCOFF.h" 28d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "llvm/MC/MCSymbol.h" 29d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "llvm/MC/MCValue.h" 30801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer#include "llvm/Support/COFF.h" 31801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer#include "llvm/Support/Debug.h" 32801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer#include "llvm/Support/ErrorHandling.h" 331f6efa3996dd1929fbc129203ce5009b620e6969Michael J. Spencer#include "llvm/Support/TimeValue.h" 34801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer#include <cstdio> 35801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 36b162290e39afd49d4c7d342333b331bc96232720Chris Lattnerusing namespace llvm; 37b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 38b162290e39afd49d4c7d342333b331bc96232720Chris Lattnernamespace { 3996f498bd9f140a98321c478f517877c4767b94faDmitri Gribenkotypedef SmallString<COFF::NameSize> name; 40801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 41801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerenum AuxiliaryType { 42801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer ATFunctionDefinition, 43801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer ATbfAndefSymbol, 44801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer ATWeakExternal, 45801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer ATFile, 46801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer ATSectionDefinition 47801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer}; 48801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 49801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerstruct AuxSymbol { 50801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer AuxiliaryType AuxType; 51801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer COFF::Auxiliary Aux; 52801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer}; 53801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 54a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencerclass COFFSymbol; 55a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencerclass COFFSection; 56a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 57801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerclass COFFSymbol { 58801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerpublic: 59801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer COFF::symbol Data; 60801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 6196f498bd9f140a98321c478f517877c4767b94faDmitri Gribenko typedef SmallVector<AuxSymbol, 1> AuxiliarySymbols; 62801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 63801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer name Name; 649cf23a9ab466a900bc0f937bc930d398d6097766Michael J. Spencer int Index; 65801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer AuxiliarySymbols Aux; 66801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer COFFSymbol *Other; 67a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer COFFSection *Section; 68a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer int Relocations; 69801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 70801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer MCSymbolData const *MCData; 71801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 7296f498bd9f140a98321c478f517877c4767b94faDmitri Gribenko COFFSymbol(StringRef name); 73801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer size_t size() const; 74801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer void set_name_offset(uint32_t Offset); 75a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 76a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer bool should_keep() const; 77801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer}; 78801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 79801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer// This class contains staging data for a COFF relocation entry. 80801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerstruct COFFRelocation { 81801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer COFF::relocation Data; 82801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer COFFSymbol *Symb; 83801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 84801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer COFFRelocation() : Symb(NULL) {} 85801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer static size_t size() { return COFF::RelocationSize; } 86801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer}; 87801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 88801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencertypedef std::vector<COFFRelocation> relocations; 89801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 90801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerclass COFFSection { 91801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerpublic: 92801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer COFF::section Header; 93801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 94801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer std::string Name; 959cf23a9ab466a900bc0f937bc930d398d6097766Michael J. Spencer int Number; 96801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer MCSectionData const *MCData; 97a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer COFFSymbol *Symbol; 98801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer relocations Relocations; 99801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 10096f498bd9f140a98321c478f517877c4767b94faDmitri Gribenko COFFSection(StringRef name); 101801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer static size_t size(); 102801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer}; 103801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 104801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer// This class holds the COFF string table. 105801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerclass StringTable { 10696f498bd9f140a98321c478f517877c4767b94faDmitri Gribenko typedef StringMap<size_t> map; 107801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer map Map; 108801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 109801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer void update_length(); 110801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerpublic: 111801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer std::vector<char> Data; 112801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 113801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer StringTable(); 114801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer size_t size() const; 11596f498bd9f140a98321c478f517877c4767b94faDmitri Gribenko size_t insert(StringRef String); 116801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer}; 117801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 118801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerclass WinCOFFObjectWriter : public MCObjectWriter { 119801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerpublic: 120801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 121801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer typedef std::vector<COFFSymbol*> symbols; 122801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer typedef std::vector<COFFSection*> sections; 123b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 1244cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer typedef DenseMap<MCSymbol const *, COFFSymbol *> symbol_map; 1254cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer typedef DenseMap<MCSection const *, COFFSection *> section_map; 126b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 127df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola llvm::OwningPtr<MCWinCOFFObjectTargetWriter> TargetObjectWriter; 128df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola 129801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Root level file contents. 130801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer COFF::header Header; 131801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer sections Sections; 132801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer symbols Symbols; 133801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer StringTable Strings; 134b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 135801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Maps used during object file creation. 136801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer section_map SectionMap; 137801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer symbol_map SymbolMap; 138801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 139df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola WinCOFFObjectWriter(MCWinCOFFObjectTargetWriter *MOTW, raw_ostream &OS); 140808ecfce6a312625bee5c0f4f9831a0d0ed01b16Benjamin Kramer ~WinCOFFObjectWriter(); 141801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 1424cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer COFFSymbol *createSymbol(StringRef Name); 1434cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer COFFSymbol *GetOrCreateCOFFSymbol(const MCSymbol * Symbol); 1444cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer COFFSection *createSection(StringRef Name); 145801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 146801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer template <typename object_t, typename list_t> 14796f498bd9f140a98321c478f517877c4767b94faDmitri Gribenko object_t *createCOFFEntity(StringRef Name, list_t &List); 148801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 149801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer void DefineSection(MCSectionData const &SectionData); 150801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer void DefineSymbol(MCSymbolData const &SymbolData, MCAssembler &Assembler); 151801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 152a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer void MakeSymbolReal(COFFSymbol &S, size_t Index); 153a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer void MakeSectionReal(COFFSection &S, size_t Number); 154a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 155a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer bool ExportSection(COFFSection const *S); 156801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer bool ExportSymbol(MCSymbolData const &SymbolData, MCAssembler &Asm); 157801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 158a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer bool IsPhysicalSection(COFFSection *S); 159a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 160801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Entity writing methods. 161801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 162801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer void WriteFileHeader(const COFF::header &Header); 163801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer void WriteSymbol(const COFFSymbol *S); 164801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer void WriteAuxiliarySymbols(const COFFSymbol::AuxiliarySymbols &S); 165801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer void WriteSectionHeader(const COFF::section &S); 166801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer void WriteRelocation(const COFF::relocation &R); 167801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 168801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // MCObjectWriter interface implementation. 169801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 17085f2ecc697a8ca6c8cf08093054cbbb9d2060ccfRafael Espindola void ExecutePostLayoutBinding(MCAssembler &Asm, const MCAsmLayout &Layout); 171801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 172801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer void RecordRelocation(const MCAssembler &Asm, 173801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer const MCAsmLayout &Layout, 174801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer const MCFragment *Fragment, 175801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer const MCFixup &Fixup, 176801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer MCValue Target, 177801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer uint64_t &FixedValue); 178801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 1798f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola void WriteObject(MCAssembler &Asm, const MCAsmLayout &Layout); 180801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer}; 181801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 182801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 183801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerstatic inline void write_uint32_le(void *Data, uint32_t const &Value) { 184801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer uint8_t *Ptr = reinterpret_cast<uint8_t *>(Data); 185801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Ptr[0] = (Value & 0x000000FF) >> 0; 186801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Ptr[1] = (Value & 0x0000FF00) >> 8; 187801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Ptr[2] = (Value & 0x00FF0000) >> 16; 188801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Ptr[3] = (Value & 0xFF000000) >> 24; 189801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 190801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 191801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerstatic inline void write_uint16_le(void *Data, uint16_t const &Value) { 192801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer uint8_t *Ptr = reinterpret_cast<uint8_t *>(Data); 193801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Ptr[0] = (Value & 0x00FF) >> 0; 194801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Ptr[1] = (Value & 0xFF00) >> 8; 195801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 196801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 197801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerstatic inline void write_uint8_le(void *Data, uint8_t const &Value) { 198801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer uint8_t *Ptr = reinterpret_cast<uint8_t *>(Data); 199801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Ptr[0] = (Value & 0xFF) >> 0; 200801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 201801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 202801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer//------------------------------------------------------------------------------ 203801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer// Symbol class implementation 204801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 20596f498bd9f140a98321c478f517877c4767b94faDmitri GribenkoCOFFSymbol::COFFSymbol(StringRef name) 206a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer : Name(name.begin(), name.end()) 207a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer , Other(NULL) 208a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer , Section(NULL) 209a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer , Relocations(0) 210a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer , MCData(NULL) { 211801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer memset(&Data, 0, sizeof(Data)); 212801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 213b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 214801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencersize_t COFFSymbol::size() const { 215801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer return COFF::SymbolSize + (Data.NumberOfAuxSymbols * COFF::SymbolSize); 216b162290e39afd49d4c7d342333b331bc96232720Chris Lattner} 217b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 218801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer// In the case that the name does not fit within 8 bytes, the offset 219801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer// into the string table is stored in the last 4 bytes instead, leaving 220801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer// the first 4 bytes as 0. 221801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencervoid COFFSymbol::set_name_offset(uint32_t Offset) { 222801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer write_uint32_le(Data.Name + 0, 0); 223801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer write_uint32_le(Data.Name + 4, Offset); 224801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 225801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 226a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer/// logic to decide if the symbol should be reported in the symbol table 227a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencerbool COFFSymbol::should_keep() const { 228a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // no section means its external, keep it 229a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (Section == NULL) 230a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer return true; 231a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 232a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // if it has relocations pointing at it, keep it 233a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (Relocations > 0) { 234a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer assert(Section->Number != -1 && "Sections with relocations must be real!"); 235a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer return true; 236a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer } 237a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 238a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // if the section its in is being droped, drop it 239a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (Section->Number == -1) 240a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer return false; 241a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 242a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // if it is the section symbol, keep it 243a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (Section->Symbol == this) 244a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer return true; 245a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 246a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // if its temporary, drop it 247a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (MCData && MCData->getSymbol().isTemporary()) 248a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer return false; 249a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 250a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // otherwise, keep it 251a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer return true; 252a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer} 253a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 254801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer//------------------------------------------------------------------------------ 255801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer// Section class implementation 256801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 25796f498bd9f140a98321c478f517877c4767b94faDmitri GribenkoCOFFSection::COFFSection(StringRef name) 258a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer : Name(name) 259a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer , MCData(NULL) 260a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer , Symbol(NULL) { 261801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer memset(&Header, 0, sizeof(Header)); 262801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 263801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 264801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencersize_t COFFSection::size() { 265801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer return COFF::SectionSize; 266801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 267801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 268801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer//------------------------------------------------------------------------------ 269801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer// StringTable class implementation 270801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 271801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer/// Write the length of the string table into Data. 272801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer/// The length of the string table includes uint32 length header. 273801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencervoid StringTable::update_length() { 274801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer write_uint32_le(&Data.front(), Data.size()); 275801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 276801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 277801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. SpencerStringTable::StringTable() { 278801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // The string table data begins with the length of the entire string table 279801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // including the length header. Allocate space for this header. 280801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Data.resize(4); 2810d64632c9e8a2632b8804bcc3fbc3523588862a7Michael J. Spencer update_length(); 282801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 283801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 284801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencersize_t StringTable::size() const { 285801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer return Data.size(); 286801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 287801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 28894c22716d60ff5edf6a98a3c67e0faa001be1142Sylvestre Ledru/// Add String to the table iff it is not already there. 289801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer/// @returns the index into the string table where the string is now located. 29096f498bd9f140a98321c478f517877c4767b94faDmitri Gribenkosize_t StringTable::insert(StringRef String) { 291801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer map::iterator i = Map.find(String); 292801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 293801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer if (i != Map.end()) 294801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer return i->second; 295801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 296801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer size_t Offset = Data.size(); 297801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 298801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Insert string data into string table. 299801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Data.insert(Data.end(), String.begin(), String.end()); 300801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Data.push_back('\0'); 301801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 302801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Put a reference to it in the map. 303801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Map[String] = Offset; 304801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 305801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Update the internal length field. 306801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer update_length(); 307801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 308801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer return Offset; 309801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 310801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 311801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer//------------------------------------------------------------------------------ 312801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer// WinCOFFObjectWriter class implementation 313801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 314df09270ae897e7fa64a7c162de163c32ee181a03Rafael EspindolaWinCOFFObjectWriter::WinCOFFObjectWriter(MCWinCOFFObjectTargetWriter *MOTW, 315df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola raw_ostream &OS) 31682c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer : MCObjectWriter(OS, true) 317df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola , TargetObjectWriter(MOTW) { 318801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer memset(&Header, 0, sizeof(Header)); 319da0bfcdaf95d95a66e306ef6d45f638939272d34Michael J. Spencer 320df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola Header.Machine = TargetObjectWriter->getMachine(); 321801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 322801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 323808ecfce6a312625bee5c0f4f9831a0d0ed01b16Benjamin KramerWinCOFFObjectWriter::~WinCOFFObjectWriter() { 324808ecfce6a312625bee5c0f4f9831a0d0ed01b16Benjamin Kramer for (symbols::iterator I = Symbols.begin(), E = Symbols.end(); I != E; ++I) 325808ecfce6a312625bee5c0f4f9831a0d0ed01b16Benjamin Kramer delete *I; 326808ecfce6a312625bee5c0f4f9831a0d0ed01b16Benjamin Kramer for (sections::iterator I = Sections.begin(), E = Sections.end(); I != E; ++I) 327808ecfce6a312625bee5c0f4f9831a0d0ed01b16Benjamin Kramer delete *I; 328808ecfce6a312625bee5c0f4f9831a0d0ed01b16Benjamin Kramer} 329808ecfce6a312625bee5c0f4f9831a0d0ed01b16Benjamin Kramer 3304cee2890a66974af506f2125243114cc14bd5556Michael J. SpencerCOFFSymbol *WinCOFFObjectWriter::createSymbol(StringRef Name) { 331801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer return createCOFFEntity<COFFSymbol>(Name, Symbols); 332801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 333801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 3344cee2890a66974af506f2125243114cc14bd5556Michael J. SpencerCOFFSymbol *WinCOFFObjectWriter::GetOrCreateCOFFSymbol(const MCSymbol * Symbol){ 3354cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer symbol_map::iterator i = SymbolMap.find(Symbol); 3364cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer if (i != SymbolMap.end()) 3374cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer return i->second; 3384cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer COFFSymbol *RetSymbol 3394cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer = createCOFFEntity<COFFSymbol>(Symbol->getName(), Symbols); 3404cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer SymbolMap[Symbol] = RetSymbol; 3414cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer return RetSymbol; 3424cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer} 3434cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer 34496f498bd9f140a98321c478f517877c4767b94faDmitri GribenkoCOFFSection *WinCOFFObjectWriter::createSection(StringRef Name) { 345801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer return createCOFFEntity<COFFSection>(Name, Sections); 346801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 347801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 348801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer/// A template used to lookup or create a symbol/section, and initialize it if 349801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer/// needed. 350801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencertemplate <typename object_t, typename list_t> 35196f498bd9f140a98321c478f517877c4767b94faDmitri Gribenkoobject_t *WinCOFFObjectWriter::createCOFFEntity(StringRef Name, 352801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer list_t &List) { 353a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer object_t *Object = new object_t(Name); 354801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 355801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer List.push_back(Object); 356801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 357801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer return Object; 358801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 359801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 360801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer/// This function takes a section data object from the assembler 361801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer/// and creates the associated COFF section staging object. 362801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencervoid WinCOFFObjectWriter::DefineSection(MCSectionData const &SectionData) { 363d47f4a9c982d264e46a6a2fe0f357288768bb5b9Michael J. Spencer assert(SectionData.getSection().getVariant() == MCSection::SV_COFF 364d47f4a9c982d264e46a6a2fe0f357288768bb5b9Michael J. Spencer && "Got non COFF section in the COFF backend!"); 365801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // FIXME: Not sure how to verify this (at least in a debug build). 366801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer MCSectionCOFF const &Sec = 367801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer static_cast<MCSectionCOFF const &>(SectionData.getSection()); 368801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 369801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer COFFSection *coff_section = createSection(Sec.getSectionName()); 370801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer COFFSymbol *coff_symbol = createSymbol(Sec.getSectionName()); 371801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 372a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer coff_section->Symbol = coff_symbol; 373a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer coff_symbol->Section = coff_section; 374801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_symbol->Data.StorageClass = COFF::IMAGE_SYM_CLASS_STATIC; 375801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 376801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // In this case the auxiliary symbol is a Section Definition. 377801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_symbol->Aux.resize(1); 378801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer memset(&coff_symbol->Aux[0], 0, sizeof(coff_symbol->Aux[0])); 379801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_symbol->Aux[0].AuxType = ATSectionDefinition; 380801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_symbol->Aux[0].Aux.SectionDefinition.Selection = Sec.getSelection(); 381801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 382801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_section->Header.Characteristics = Sec.getCharacteristics(); 383801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 384801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer uint32_t &Characteristics = coff_section->Header.Characteristics; 385801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer switch (SectionData.getAlignment()) { 386801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 1: Characteristics |= COFF::IMAGE_SCN_ALIGN_1BYTES; break; 387801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 2: Characteristics |= COFF::IMAGE_SCN_ALIGN_2BYTES; break; 388801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 4: Characteristics |= COFF::IMAGE_SCN_ALIGN_4BYTES; break; 389801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 8: Characteristics |= COFF::IMAGE_SCN_ALIGN_8BYTES; break; 390801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 16: Characteristics |= COFF::IMAGE_SCN_ALIGN_16BYTES; break; 391801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 32: Characteristics |= COFF::IMAGE_SCN_ALIGN_32BYTES; break; 392801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 64: Characteristics |= COFF::IMAGE_SCN_ALIGN_64BYTES; break; 393801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 128: Characteristics |= COFF::IMAGE_SCN_ALIGN_128BYTES; break; 394801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 256: Characteristics |= COFF::IMAGE_SCN_ALIGN_256BYTES; break; 395801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 512: Characteristics |= COFF::IMAGE_SCN_ALIGN_512BYTES; break; 396801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 1024: Characteristics |= COFF::IMAGE_SCN_ALIGN_1024BYTES; break; 397801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 2048: Characteristics |= COFF::IMAGE_SCN_ALIGN_2048BYTES; break; 398801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 4096: Characteristics |= COFF::IMAGE_SCN_ALIGN_4096BYTES; break; 399801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 8192: Characteristics |= COFF::IMAGE_SCN_ALIGN_8192BYTES; break; 400801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer default: 401801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer llvm_unreachable("unsupported section alignment"); 402801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 403801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 404801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Bind internal COFF section to MC section. 405801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_section->MCData = &SectionData; 4064cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer SectionMap[&SectionData.getSection()] = coff_section; 407801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 408801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 409801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer/// This function takes a section data object from the assembler 410801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer/// and creates the associated COFF symbol staging object. 411801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencervoid WinCOFFObjectWriter::DefineSymbol(MCSymbolData const &SymbolData, 412a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer MCAssembler &Assembler) { 4134cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer COFFSymbol *coff_symbol = GetOrCreateCOFFSymbol(&SymbolData.getSymbol()); 414801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 415801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_symbol->Data.Type = (SymbolData.getFlags() & 0x0000FFFF) >> 0; 416801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_symbol->Data.StorageClass = (SymbolData.getFlags() & 0x00FF0000) >> 16; 417801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 4184cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer if (SymbolData.getFlags() & COFF::SF_WeakExternal) { 419801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_symbol->Data.StorageClass = COFF::IMAGE_SYM_CLASS_WEAK_EXTERNAL; 420801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 4214cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer if (SymbolData.getSymbol().isVariable()) { 4224cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer coff_symbol->Data.StorageClass = COFF::IMAGE_SYM_CLASS_WEAK_EXTERNAL; 4234cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer const MCExpr *Value = SymbolData.getSymbol().getVariableValue(); 424801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 4254cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer // FIXME: This assert message isn't very good. 4264cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer assert(Value->getKind() == MCExpr::SymbolRef && 4274cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer "Value must be a SymbolRef!"); 428801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 4294cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer const MCSymbolRefExpr *SymbolRef = 4304cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer static_cast<const MCSymbolRefExpr *>(Value); 4314cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer coff_symbol->Other = GetOrCreateCOFFSymbol(&SymbolRef->getSymbol()); 4324cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer } else { 4334cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer std::string WeakName = std::string(".weak.") 4344cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer + SymbolData.getSymbol().getName().str() 4354cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer + ".default"; 4364cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer COFFSymbol *WeakDefault = createSymbol(WeakName); 4374cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer WeakDefault->Data.SectionNumber = COFF::IMAGE_SYM_ABSOLUTE; 4384cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer WeakDefault->Data.StorageClass = COFF::IMAGE_SYM_CLASS_EXTERNAL; 4394cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer WeakDefault->Data.Type = 0; 4404cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer WeakDefault->Data.Value = 0; 4414cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer coff_symbol->Other = WeakDefault; 4424cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer } 443801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 444801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Setup the Weak External auxiliary symbol. 445801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_symbol->Aux.resize(1); 446801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer memset(&coff_symbol->Aux[0], 0, sizeof(coff_symbol->Aux[0])); 447801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_symbol->Aux[0].AuxType = ATWeakExternal; 448801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_symbol->Aux[0].Aux.WeakExternal.TagIndex = 0; 449801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_symbol->Aux[0].Aux.WeakExternal.Characteristics = 4504cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer COFF::IMAGE_WEAK_EXTERN_SEARCH_LIBRARY; 4514cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer } 4524cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer 4534cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer // If no storage class was specified in the streamer, define it here. 4544cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer if (coff_symbol->Data.StorageClass == 0) { 4554cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer bool external = SymbolData.isExternal() || (SymbolData.Fragment == NULL); 4564cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer 4574cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer coff_symbol->Data.StorageClass = 4584cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer external ? COFF::IMAGE_SYM_CLASS_EXTERNAL : COFF::IMAGE_SYM_CLASS_STATIC; 459801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 460801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 461a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (SymbolData.Fragment != NULL) 4624cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer coff_symbol->Section = 4634cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer SectionMap[&SymbolData.Fragment->getParent()->getSection()]; 464a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 465801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Bind internal COFF symbol to MC symbol. 466801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_symbol->MCData = &SymbolData; 4674cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer SymbolMap[&SymbolData.getSymbol()] = coff_symbol; 468801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 469801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 470a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer/// making a section real involves assigned it a number and putting 471a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer/// name into the string table if needed 472a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencervoid WinCOFFObjectWriter::MakeSectionReal(COFFSection &S, size_t Number) { 473a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (S.Name.size() > COFF::NameSize) { 474a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer size_t StringTableEntry = Strings.insert(S.Name.c_str()); 475a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 476a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // FIXME: Why is this number 999999? This number is never mentioned in the 477a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // spec. I'm assuming this is due to the printed value needing to fit into 478a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // the S.Header.Name field. In which case why not 9999999 (7 9's instead of 479a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // 6)? The spec does not state if this entry should be null terminated in 480a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // this case, and thus this seems to be the best way to do it. I think I 481a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // just solved my own FIXME... 482a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (StringTableEntry > 999999) 483a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer report_fatal_error("COFF string table is greater than 999999 bytes."); 484a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 485a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer std::sprintf(S.Header.Name, "/%d", unsigned(StringTableEntry)); 486a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer } else 487a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer std::memcpy(S.Header.Name, S.Name.c_str(), S.Name.size()); 488a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 489a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer S.Number = Number; 490a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer S.Symbol->Data.SectionNumber = S.Number; 491a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer S.Symbol->Aux[0].Aux.SectionDefinition.Number = S.Number; 492a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer} 493a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 494a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencervoid WinCOFFObjectWriter::MakeSymbolReal(COFFSymbol &S, size_t Index) { 495a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (S.Name.size() > COFF::NameSize) { 496a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer size_t StringTableEntry = Strings.insert(S.Name.c_str()); 497a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 498a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer S.set_name_offset(StringTableEntry); 499a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer } else 500a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer std::memcpy(S.Data.Name, S.Name.c_str(), S.Name.size()); 501a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer S.Index = Index; 502a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer} 503a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 504a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencerbool WinCOFFObjectWriter::ExportSection(COFFSection const *S) { 505a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer return !S->MCData->getFragmentList().empty(); 506801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 507801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 508801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerbool WinCOFFObjectWriter::ExportSymbol(MCSymbolData const &SymbolData, 509801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer MCAssembler &Asm) { 510801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // This doesn't seem to be right. Strings referred to from the .data section 511801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // need symbols so they can be linked to code in the .text section right? 512801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 513801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // return Asm.isSymbolLinkerVisible (&SymbolData); 514801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 515a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // For now, all non-variable symbols are exported, 516a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // the linker will sort the rest out for us. 5174cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer return SymbolData.isExternal() || !SymbolData.getSymbol().isVariable(); 518a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer} 519a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 520a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencerbool WinCOFFObjectWriter::IsPhysicalSection(COFFSection *S) { 521a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer return (S->Header.Characteristics 522a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA) == 0; 523801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 524801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 525801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer//------------------------------------------------------------------------------ 526801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer// entity writing methods 527801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 528801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencervoid WinCOFFObjectWriter::WriteFileHeader(const COFF::header &Header) { 529801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(Header.Machine); 530801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(Header.NumberOfSections); 531801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(Header.TimeDateStamp); 532801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(Header.PointerToSymbolTable); 533801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(Header.NumberOfSymbols); 534801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(Header.SizeOfOptionalHeader); 535801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(Header.Characteristics); 536801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 537801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 538801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencervoid WinCOFFObjectWriter::WriteSymbol(const COFFSymbol *S) { 539801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteBytes(StringRef(S->Data.Name, COFF::NameSize)); 540801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(S->Data.Value); 541801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(S->Data.SectionNumber); 542801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(S->Data.Type); 543801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Write8(S->Data.StorageClass); 544801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Write8(S->Data.NumberOfAuxSymbols); 545801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteAuxiliarySymbols(S->Aux); 546801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 547801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 548801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencervoid WinCOFFObjectWriter::WriteAuxiliarySymbols( 549801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer const COFFSymbol::AuxiliarySymbols &S) { 550801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for(COFFSymbol::AuxiliarySymbols::const_iterator i = S.begin(), e = S.end(); 551801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer i != e; ++i) { 552801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer switch(i->AuxType) { 553801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case ATFunctionDefinition: 554801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(i->Aux.FunctionDefinition.TagIndex); 555801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(i->Aux.FunctionDefinition.TotalSize); 556801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(i->Aux.FunctionDefinition.PointerToLinenumber); 557801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(i->Aux.FunctionDefinition.PointerToNextFunction); 558801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteZeros(sizeof(i->Aux.FunctionDefinition.unused)); 559801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer break; 560801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case ATbfAndefSymbol: 561801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteZeros(sizeof(i->Aux.bfAndefSymbol.unused1)); 562801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(i->Aux.bfAndefSymbol.Linenumber); 563801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteZeros(sizeof(i->Aux.bfAndefSymbol.unused2)); 564801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(i->Aux.bfAndefSymbol.PointerToNextFunction); 565801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteZeros(sizeof(i->Aux.bfAndefSymbol.unused3)); 566801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer break; 567801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case ATWeakExternal: 568801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(i->Aux.WeakExternal.TagIndex); 569801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(i->Aux.WeakExternal.Characteristics); 570801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteZeros(sizeof(i->Aux.WeakExternal.unused)); 571801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer break; 572801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case ATFile: 573801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteBytes(StringRef(reinterpret_cast<const char *>(i->Aux.File.FileName), 574801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer sizeof(i->Aux.File.FileName))); 575801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer break; 576801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case ATSectionDefinition: 577801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(i->Aux.SectionDefinition.Length); 578801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(i->Aux.SectionDefinition.NumberOfRelocations); 579801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(i->Aux.SectionDefinition.NumberOfLinenumbers); 580801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(i->Aux.SectionDefinition.CheckSum); 581801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(i->Aux.SectionDefinition.Number); 582801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Write8(i->Aux.SectionDefinition.Selection); 583801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteZeros(sizeof(i->Aux.SectionDefinition.unused)); 584801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer break; 585801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 586801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 587801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 588801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 589801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencervoid WinCOFFObjectWriter::WriteSectionHeader(const COFF::section &S) { 590801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteBytes(StringRef(S.Name, COFF::NameSize)); 591801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 592801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(S.VirtualSize); 593801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(S.VirtualAddress); 594801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(S.SizeOfRawData); 595801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(S.PointerToRawData); 596801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(S.PointerToRelocations); 597801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(S.PointerToLineNumbers); 598801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(S.NumberOfRelocations); 599801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(S.NumberOfLineNumbers); 600801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(S.Characteristics); 601801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 602801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 603801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencervoid WinCOFFObjectWriter::WriteRelocation(const COFF::relocation &R) { 604801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(R.VirtualAddress); 605801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(R.SymbolTableIndex); 606801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(R.Type); 607b162290e39afd49d4c7d342333b331bc96232720Chris Lattner} 608b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 609b162290e39afd49d4c7d342333b331bc96232720Chris Lattner//////////////////////////////////////////////////////////////////////////////// 610b162290e39afd49d4c7d342333b331bc96232720Chris Lattner// MCObjectWriter interface implementations 611b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 61285f2ecc697a8ca6c8cf08093054cbbb9d2060ccfRafael Espindolavoid WinCOFFObjectWriter::ExecutePostLayoutBinding(MCAssembler &Asm, 61385f2ecc697a8ca6c8cf08093054cbbb9d2060ccfRafael Espindola const MCAsmLayout &Layout) { 614801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // "Define" each section & symbol. This creates section & symbol 615a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // entries in the staging area. 616801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 617801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for (MCAssembler::const_iterator i = Asm.begin(), e = Asm.end(); i != e; i++) 618801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer DefineSection(*i); 619801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 620801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for (MCAssembler::const_symbol_iterator i = Asm.symbol_begin(), 621801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer e = Asm.symbol_end(); i != e; i++) { 622801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer if (ExportSymbol(*i, Asm)) 623801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer DefineSymbol(*i, Asm); 624801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 625b162290e39afd49d4c7d342333b331bc96232720Chris Lattner} 626b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 627b162290e39afd49d4c7d342333b331bc96232720Chris Lattnervoid WinCOFFObjectWriter::RecordRelocation(const MCAssembler &Asm, 628b162290e39afd49d4c7d342333b331bc96232720Chris Lattner const MCAsmLayout &Layout, 629b162290e39afd49d4c7d342333b331bc96232720Chris Lattner const MCFragment *Fragment, 630b162290e39afd49d4c7d342333b331bc96232720Chris Lattner const MCFixup &Fixup, 631b162290e39afd49d4c7d342333b331bc96232720Chris Lattner MCValue Target, 632b162290e39afd49d4c7d342333b331bc96232720Chris Lattner uint64_t &FixedValue) { 633801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer assert(Target.getSymA() != NULL && "Relocation must reference a symbol!"); 63482c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer 63582c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer const MCSymbol *A = &Target.getSymA()->getSymbol(); 63682c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer MCSymbolData &A_SD = Asm.getSymbolData(*A); 637801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 638801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer MCSectionData const *SectionData = Fragment->getParent(); 639801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 64082c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer // Mark this symbol as requiring an entry in the symbol table. 6414cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer assert(SectionMap.find(&SectionData->getSection()) != SectionMap.end() && 642801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer "Section must already have been defined in ExecutePostLayoutBinding!"); 6434cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer assert(SymbolMap.find(&A_SD.getSymbol()) != SymbolMap.end() && 644801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer "Symbol must already have been defined in ExecutePostLayoutBinding!"); 645801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 6464cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer COFFSection *coff_section = SectionMap[&SectionData->getSection()]; 6474cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer COFFSymbol *coff_symbol = SymbolMap[&A_SD.getSymbol()]; 6483660a847f1820d73847539f3959dc069396f8e44Rafael Espindola const MCSymbolRefExpr *SymA = Target.getSymA(); 6493660a847f1820d73847539f3959dc069396f8e44Rafael Espindola const MCSymbolRefExpr *SymB = Target.getSymB(); 6503660a847f1820d73847539f3959dc069396f8e44Rafael Espindola const bool CrossSection = SymB && 6513660a847f1820d73847539f3959dc069396f8e44Rafael Espindola &SymA->getSymbol().getSection() != &SymB->getSymbol().getSection(); 65282c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer 65382c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer if (Target.getSymB()) { 65482c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer const MCSymbol *B = &Target.getSymB()->getSymbol(); 65582c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer MCSymbolData &B_SD = Asm.getSymbolData(*B); 656801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 6571ac7fe0f4dae8a9266fa6ff31ea4939ec64a3e5eRafael Espindola // Offset of the symbol in the section 6581ac7fe0f4dae8a9266fa6ff31ea4939ec64a3e5eRafael Espindola int64_t a = Layout.getSymbolOffset(&B_SD); 65982c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer 6601ac7fe0f4dae8a9266fa6ff31ea4939ec64a3e5eRafael Espindola // Ofeset of the relocation in the section 6611ac7fe0f4dae8a9266fa6ff31ea4939ec64a3e5eRafael Espindola int64_t b = Layout.getFragmentOffset(Fragment) + Fixup.getOffset(); 6621ac7fe0f4dae8a9266fa6ff31ea4939ec64a3e5eRafael Espindola 6631ac7fe0f4dae8a9266fa6ff31ea4939ec64a3e5eRafael Espindola FixedValue = b - a; 66482c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer // In the case where we have SymbA and SymB, we just need to store the delta 66582c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer // between the two symbols. Update FixedValue to account for the delta, and 66682c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer // skip recording the relocation. 6673660a847f1820d73847539f3959dc069396f8e44Rafael Espindola if (!CrossSection) 6683660a847f1820d73847539f3959dc069396f8e44Rafael Espindola return; 66982c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer } else { 67082c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer FixedValue = Target.getConstant(); 67182c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer } 672801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 673801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer COFFRelocation Reloc; 674801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 675425f634917542d7f09c189e2eb130752c6a12d2cDaniel Dunbar Reloc.Data.SymbolTableIndex = 0; 676801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Reloc.Data.VirtualAddress = Layout.getFragmentOffset(Fragment); 677a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 678ea1104a4c376634ed8eb693f6c71e0ac51074949Michael J. Spencer // Turn relocations for temporary symbols into section relocations. 6793660a847f1820d73847539f3959dc069396f8e44Rafael Espindola if (coff_symbol->MCData->getSymbol().isTemporary() || CrossSection) { 680a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer Reloc.Symb = coff_symbol->Section->Symbol; 681eb6e77f8cccd14cdba995ff8231f2c9faea9bfccMichael J. Spencer FixedValue += Layout.getFragmentOffset(coff_symbol->MCData->Fragment) 682eb6e77f8cccd14cdba995ff8231f2c9faea9bfccMichael J. Spencer + coff_symbol->MCData->getOffset(); 683a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer } else 684a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer Reloc.Symb = coff_symbol; 685a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 686a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer ++Reloc.Symb->Relocations; 687801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 688801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Reloc.Data.VirtualAddress += Fixup.getOffset(); 689801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 6903660a847f1820d73847539f3959dc069396f8e44Rafael Espindola unsigned FixupKind = Fixup.getKind(); 6913660a847f1820d73847539f3959dc069396f8e44Rafael Espindola 6923660a847f1820d73847539f3959dc069396f8e44Rafael Espindola if (CrossSection) 6933660a847f1820d73847539f3959dc069396f8e44Rafael Espindola FixupKind = FK_PCRel_4; 6943660a847f1820d73847539f3959dc069396f8e44Rafael Espindola 695df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola Reloc.Data.Type = TargetObjectWriter->getRelocType(FixupKind); 696b156c5d3765637393eda28b04b7fc1e5c55675ebRafael Espindola 697b156c5d3765637393eda28b04b7fc1e5c55675ebRafael Espindola // FIXME: Can anyone explain what this does other than adjust for the size 698b156c5d3765637393eda28b04b7fc1e5c55675ebRafael Espindola // of the offset? 699b156c5d3765637393eda28b04b7fc1e5c55675ebRafael Espindola if (Reloc.Data.Type == COFF::IMAGE_REL_AMD64_REL32 || 700b156c5d3765637393eda28b04b7fc1e5c55675ebRafael Espindola Reloc.Data.Type == COFF::IMAGE_REL_I386_REL32) 70182c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer FixedValue += 4; 702801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 703801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_section->Relocations.push_back(Reloc); 704b162290e39afd49d4c7d342333b331bc96232720Chris Lattner} 705b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 7068f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindolavoid WinCOFFObjectWriter::WriteObject(MCAssembler &Asm, 707b162290e39afd49d4c7d342333b331bc96232720Chris Lattner const MCAsmLayout &Layout) { 708801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Assign symbol and section indexes and offsets. 709a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer Header.NumberOfSections = 0; 710a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 711a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer for (sections::iterator i = Sections.begin(), 712a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer e = Sections.end(); i != e; i++) { 71385f2ecc697a8ca6c8cf08093054cbbb9d2060ccfRafael Espindola if (Layout.getSectionAddressSize((*i)->MCData) > 0) { 714a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer MakeSectionReal(**i, ++Header.NumberOfSections); 715a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer } else { 716a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer (*i)->Number = -1; 717a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer } 718a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer } 719801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 720801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Header.NumberOfSymbols = 0; 721801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 722801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for (symbols::iterator i = Symbols.begin(), e = Symbols.end(); i != e; i++) { 723801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer COFFSymbol *coff_symbol = *i; 724801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer MCSymbolData const *SymbolData = coff_symbol->MCData; 725801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 726801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Update section number & offset for symbols that have them. 727801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer if ((SymbolData != NULL) && (SymbolData->Fragment != NULL)) { 728a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer assert(coff_symbol->Section != NULL); 729801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 730a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer coff_symbol->Data.SectionNumber = coff_symbol->Section->Number; 731237f8fe5df628065874b8590b364d04dfc2686fdMichael J. Spencer coff_symbol->Data.Value = Layout.getFragmentOffset(SymbolData->Fragment) 732237f8fe5df628065874b8590b364d04dfc2686fdMichael J. Spencer + SymbolData->Offset; 733801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 734801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 735a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (coff_symbol->should_keep()) { 736a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer MakeSymbolReal(*coff_symbol, Header.NumberOfSymbols++); 737a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 738a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // Update auxiliary symbol info. 739a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer coff_symbol->Data.NumberOfAuxSymbols = coff_symbol->Aux.size(); 740a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer Header.NumberOfSymbols += coff_symbol->Data.NumberOfAuxSymbols; 741a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer } else 742a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer coff_symbol->Index = -1; 743801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 744801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 745801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Fixup weak external references. 746801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for (symbols::iterator i = Symbols.begin(), e = Symbols.end(); i != e; i++) { 747a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer COFFSymbol *coff_symbol = *i; 748a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (coff_symbol->Other != NULL) { 749a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer assert(coff_symbol->Index != -1); 750a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer assert(coff_symbol->Aux.size() == 1 && 751801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer "Symbol must contain one aux symbol!"); 752a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer assert(coff_symbol->Aux[0].AuxType == ATWeakExternal && 753801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer "Symbol's aux symbol must be a Weak External!"); 754a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer coff_symbol->Aux[0].Aux.WeakExternal.TagIndex = coff_symbol->Other->Index; 755801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 756801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 757801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 758801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Assign file offsets to COFF object file structures. 759801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 760801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer unsigned offset = 0; 761801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 762801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer offset += COFF::HeaderSize; 763a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer offset += COFF::SectionSize * Header.NumberOfSections; 764801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 765801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for (MCAssembler::const_iterator i = Asm.begin(), 766801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer e = Asm.end(); 767801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer i != e; i++) { 7684cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer COFFSection *Sec = SectionMap[&i->getSection()]; 769801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 770a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (Sec->Number == -1) 771a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer continue; 772a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 77328ca86aa19fe2a5493573164ef0c2c54542ed9daMichael J. Spencer Sec->Header.SizeOfRawData = Layout.getSectionAddressSize(i); 774801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 775a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (IsPhysicalSection(Sec)) { 776801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Sec->Header.PointerToRawData = offset; 777801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 778801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer offset += Sec->Header.SizeOfRawData; 779801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 780801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 781801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer if (Sec->Relocations.size() > 0) { 782d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer bool RelocationsOverflow = Sec->Relocations.size() >= 0xffff; 783d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer 784d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer if (RelocationsOverflow) { 785d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer // Signal overflow by setting NumberOfSections to max value. Actual 786d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer // size is found in reloc #0. Microsoft tools understand this. 787d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer Sec->Header.NumberOfRelocations = 0xffff; 788d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer } else { 789d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer Sec->Header.NumberOfRelocations = Sec->Relocations.size(); 790d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer } 791801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Sec->Header.PointerToRelocations = offset; 792801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 793d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer if (RelocationsOverflow) { 794d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer // Reloc #0 will contain actual count, so make room for it. 795d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer offset += COFF::RelocationSize; 796d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer } 797d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer 798801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer offset += COFF::RelocationSize * Sec->Relocations.size(); 799801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 800801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for (relocations::iterator cr = Sec->Relocations.begin(), 801801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer er = Sec->Relocations.end(); 802a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer cr != er; ++cr) { 803a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer assert((*cr).Symb->Index != -1); 804801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer (*cr).Data.SymbolTableIndex = (*cr).Symb->Index; 805801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 806801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 807801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 808a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer assert(Sec->Symbol->Aux.size() == 1 809a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer && "Section's symbol must have one aux!"); 810a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer AuxSymbol &Aux = Sec->Symbol->Aux[0]; 811801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer assert(Aux.AuxType == ATSectionDefinition && 812801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer "Section's symbol's aux symbol must be a Section Definition!"); 813801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Aux.Aux.SectionDefinition.Length = Sec->Header.SizeOfRawData; 814801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Aux.Aux.SectionDefinition.NumberOfRelocations = 815801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Sec->Header.NumberOfRelocations; 816801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Aux.Aux.SectionDefinition.NumberOfLinenumbers = 817801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Sec->Header.NumberOfLineNumbers; 818801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 819801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 820801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Header.PointerToSymbolTable = offset; 821801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 822ab3de49c48bd3282421ce24323fb6b868a3da6ccMichael J. Spencer Header.TimeDateStamp = sys::TimeValue::now().toEpochTime(); 823ab3de49c48bd3282421ce24323fb6b868a3da6ccMichael J. Spencer 824801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Write it all to disk... 825801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteFileHeader(Header); 826801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 827801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer { 828801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer sections::iterator i, ie; 829801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer MCAssembler::const_iterator j, je; 830801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 831801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for (i = Sections.begin(), ie = Sections.end(); i != ie; i++) 832d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer if ((*i)->Number != -1) { 833d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer if ((*i)->Relocations.size() >= 0xffff) { 834d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer (*i)->Header.Characteristics |= COFF::IMAGE_SCN_LNK_NRELOC_OVFL; 835d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer } 836a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer WriteSectionHeader((*i)->Header); 837d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer } 838801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 839801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for (i = Sections.begin(), ie = Sections.end(), 840801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer j = Asm.begin(), je = Asm.end(); 841a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer (i != ie) && (j != je); ++i, ++j) { 842a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 843a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if ((*i)->Number == -1) 844a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer continue; 845a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 846801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer if ((*i)->Header.PointerToRawData != 0) { 847801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer assert(OS.tell() == (*i)->Header.PointerToRawData && 848801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer "Section::PointerToRawData is insane!"); 849801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 850f77d5b14af6b92403b93f7ed249f9023e99028ccJim Grosbach Asm.writeSectionData(j, Layout); 851801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 852801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 853801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer if ((*i)->Relocations.size() > 0) { 854801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer assert(OS.tell() == (*i)->Header.PointerToRelocations && 855801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer "Section::PointerToRelocations is insane!"); 856801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 857d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer if ((*i)->Relocations.size() >= 0xffff) { 858d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer // In case of overflow, write actual relocation count as first 859d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer // relocation. Including the synthetic reloc itself (+ 1). 860d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer COFF::relocation r; 861d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer r.VirtualAddress = (*i)->Relocations.size() + 1; 862d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer r.SymbolTableIndex = 0; 863d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer r.Type = 0; 864d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer WriteRelocation(r); 865d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer } 866d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer 867801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for (relocations::const_iterator k = (*i)->Relocations.begin(), 868801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer ke = (*i)->Relocations.end(); 869801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer k != ke; k++) { 870801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteRelocation(k->Data); 871801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 872801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } else 873801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer assert((*i)->Header.PointerToRelocations == 0 && 874801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer "Section::PointerToRelocations is insane!"); 875801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 876801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 877801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 878801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer assert(OS.tell() == Header.PointerToSymbolTable && 879801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer "Header::PointerToSymbolTable is insane!"); 880801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 881801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for (symbols::iterator i = Symbols.begin(), e = Symbols.end(); i != e; i++) 882a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if ((*i)->Index != -1) 883a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer WriteSymbol(*i); 884801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 885801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer OS.write((char const *)&Strings.Data.front(), Strings.Data.size()); 886b162290e39afd49d4c7d342333b331bc96232720Chris Lattner} 887b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 888df09270ae897e7fa64a7c162de163c32ee181a03Rafael EspindolaMCWinCOFFObjectTargetWriter::MCWinCOFFObjectTargetWriter(unsigned Machine_) : 889df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola Machine(Machine_) { 890df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola} 891df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola 892b162290e39afd49d4c7d342333b331bc96232720Chris Lattner//------------------------------------------------------------------------------ 893b162290e39afd49d4c7d342333b331bc96232720Chris Lattner// WinCOFFObjectWriter factory function 894b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 895b162290e39afd49d4c7d342333b331bc96232720Chris Lattnernamespace llvm { 896df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola MCObjectWriter *createWinCOFFObjectWriter(MCWinCOFFObjectTargetWriter *MOTW, 897df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola raw_ostream &OS) { 898df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola return new WinCOFFObjectWriter(MOTW, OS); 899b162290e39afd49d4c7d342333b331bc96232720Chris Lattner } 900933304ef0c3ec18c23d0b385c2117a6eae790430Michael J. Spencer} 901