WinCOFFObjectWriter.cpp revision c63dce3c59ac24b2656e06f7017cd4dce4bf733c
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" 2180646283796b20c6a1b7d8eb69ce6f0478d54383Nico Rieck#include "llvm/ADT/Twine.h" 22d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "llvm/MC/MCAsmLayout.h" 23d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "llvm/MC/MCAssembler.h" 24d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "llvm/MC/MCContext.h" 25d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "llvm/MC/MCExpr.h" 26d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "llvm/MC/MCObjectWriter.h" 27d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "llvm/MC/MCSection.h" 28d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "llvm/MC/MCSectionCOFF.h" 29d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "llvm/MC/MCSymbol.h" 30d04a8d4b33ff316ca4cf961e06c9e312eff8e64fChandler Carruth#include "llvm/MC/MCValue.h" 31801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer#include "llvm/Support/COFF.h" 32801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer#include "llvm/Support/Debug.h" 33801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer#include "llvm/Support/ErrorHandling.h" 341f6efa3996dd1929fbc129203ce5009b620e6969Michael J. Spencer#include "llvm/Support/TimeValue.h" 35801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer#include <cstdio> 36801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 37b162290e39afd49d4c7d342333b331bc96232720Chris Lattnerusing namespace llvm; 38b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 39b162290e39afd49d4c7d342333b331bc96232720Chris Lattnernamespace { 4096f498bd9f140a98321c478f517877c4767b94faDmitri Gribenkotypedef SmallString<COFF::NameSize> name; 41801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 42801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerenum AuxiliaryType { 43801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer ATFunctionDefinition, 44801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer ATbfAndefSymbol, 45801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer ATWeakExternal, 46801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer ATFile, 47801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer ATSectionDefinition 48801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer}; 49801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 50801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerstruct AuxSymbol { 51801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer AuxiliaryType AuxType; 52801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer COFF::Auxiliary Aux; 53801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer}; 54801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 55a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencerclass COFFSymbol; 56a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencerclass COFFSection; 57a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 58801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerclass COFFSymbol { 59801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerpublic: 60801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer COFF::symbol Data; 61801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 6296f498bd9f140a98321c478f517877c4767b94faDmitri Gribenko typedef SmallVector<AuxSymbol, 1> AuxiliarySymbols; 63801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 64801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer name Name; 659cf23a9ab466a900bc0f937bc930d398d6097766Michael J. Spencer int Index; 66801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer AuxiliarySymbols Aux; 67801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer COFFSymbol *Other; 68a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer COFFSection *Section; 69a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer int Relocations; 70801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 71801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer MCSymbolData const *MCData; 72801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 7396f498bd9f140a98321c478f517877c4767b94faDmitri Gribenko COFFSymbol(StringRef name); 74801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer size_t size() const; 75801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer void set_name_offset(uint32_t Offset); 76a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 77a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer bool should_keep() const; 78801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer}; 79801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 80801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer// This class contains staging data for a COFF relocation entry. 81801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerstruct COFFRelocation { 82801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer COFF::relocation Data; 83801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer COFFSymbol *Symb; 84801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 85801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer COFFRelocation() : Symb(NULL) {} 86801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer static size_t size() { return COFF::RelocationSize; } 87801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer}; 88801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 89801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencertypedef std::vector<COFFRelocation> relocations; 90801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 91801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerclass COFFSection { 92801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerpublic: 93801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer COFF::section Header; 94801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 95801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer std::string Name; 969cf23a9ab466a900bc0f937bc930d398d6097766Michael J. Spencer int Number; 97801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer MCSectionData const *MCData; 98a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer COFFSymbol *Symbol; 99801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer relocations Relocations; 100801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 10196f498bd9f140a98321c478f517877c4767b94faDmitri Gribenko COFFSection(StringRef name); 102801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer static size_t size(); 103801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer}; 104801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 105801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer// This class holds the COFF string table. 106801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerclass StringTable { 10796f498bd9f140a98321c478f517877c4767b94faDmitri Gribenko typedef StringMap<size_t> map; 108801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer map Map; 109801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 110801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer void update_length(); 111801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerpublic: 112801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer std::vector<char> Data; 113801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 114801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer StringTable(); 115801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer size_t size() const; 11696f498bd9f140a98321c478f517877c4767b94faDmitri Gribenko size_t insert(StringRef String); 117801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer}; 118801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 119801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerclass WinCOFFObjectWriter : public MCObjectWriter { 120801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerpublic: 121801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 122801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer typedef std::vector<COFFSymbol*> symbols; 123801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer typedef std::vector<COFFSection*> sections; 124b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 1254cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer typedef DenseMap<MCSymbol const *, COFFSymbol *> symbol_map; 1264cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer typedef DenseMap<MCSection const *, COFFSection *> section_map; 127b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 128df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola llvm::OwningPtr<MCWinCOFFObjectTargetWriter> TargetObjectWriter; 129df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola 130801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Root level file contents. 131801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer COFF::header Header; 132801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer sections Sections; 133801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer symbols Symbols; 134801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer StringTable Strings; 135b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 136801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Maps used during object file creation. 137801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer section_map SectionMap; 138801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer symbol_map SymbolMap; 139801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 140df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola WinCOFFObjectWriter(MCWinCOFFObjectTargetWriter *MOTW, raw_ostream &OS); 141808ecfce6a312625bee5c0f4f9831a0d0ed01b16Benjamin Kramer ~WinCOFFObjectWriter(); 142801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 1434cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer COFFSymbol *createSymbol(StringRef Name); 1444cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer COFFSymbol *GetOrCreateCOFFSymbol(const MCSymbol * Symbol); 1454cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer COFFSection *createSection(StringRef Name); 146801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 147801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer template <typename object_t, typename list_t> 14896f498bd9f140a98321c478f517877c4767b94faDmitri Gribenko object_t *createCOFFEntity(StringRef Name, list_t &List); 149801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 150801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer void DefineSection(MCSectionData const &SectionData); 1514974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne void DefineSymbol(MCSymbolData const &SymbolData, 1520933134a304b47d3767aad202df9f0e09743da6dMichael J. Spencer MCAssembler &Assembler); 153801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 154a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer void MakeSymbolReal(COFFSymbol &S, size_t Index); 155a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer void MakeSectionReal(COFFSection &S, size_t Number); 156a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 157a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer bool ExportSection(COFFSection const *S); 158801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer bool ExportSymbol(MCSymbolData const &SymbolData, MCAssembler &Asm); 159801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 160a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer bool IsPhysicalSection(COFFSection *S); 161a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 162801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Entity writing methods. 163801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 164801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer void WriteFileHeader(const COFF::header &Header); 165801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer void WriteSymbol(const COFFSymbol *S); 166801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer void WriteAuxiliarySymbols(const COFFSymbol::AuxiliarySymbols &S); 167801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer void WriteSectionHeader(const COFF::section &S); 168801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer void WriteRelocation(const COFF::relocation &R); 169801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 170801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // MCObjectWriter interface implementation. 171801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 17285f2ecc697a8ca6c8cf08093054cbbb9d2060ccfRafael Espindola void ExecutePostLayoutBinding(MCAssembler &Asm, const MCAsmLayout &Layout); 173801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 174801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer void RecordRelocation(const MCAssembler &Asm, 175801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer const MCAsmLayout &Layout, 176801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer const MCFragment *Fragment, 177801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer const MCFixup &Fixup, 178801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer MCValue Target, 179801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer uint64_t &FixedValue); 180801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 1818f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola void WriteObject(MCAssembler &Asm, const MCAsmLayout &Layout); 182801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer}; 183801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 184801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 185801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerstatic inline void write_uint32_le(void *Data, uint32_t const &Value) { 186801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer uint8_t *Ptr = reinterpret_cast<uint8_t *>(Data); 187801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Ptr[0] = (Value & 0x000000FF) >> 0; 188801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Ptr[1] = (Value & 0x0000FF00) >> 8; 189801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Ptr[2] = (Value & 0x00FF0000) >> 16; 190801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Ptr[3] = (Value & 0xFF000000) >> 24; 191801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 192801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 193801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerstatic inline void write_uint16_le(void *Data, uint16_t const &Value) { 194801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer uint8_t *Ptr = reinterpret_cast<uint8_t *>(Data); 195801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Ptr[0] = (Value & 0x00FF) >> 0; 196801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Ptr[1] = (Value & 0xFF00) >> 8; 197801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 198801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 199801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerstatic inline void write_uint8_le(void *Data, uint8_t const &Value) { 200801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer uint8_t *Ptr = reinterpret_cast<uint8_t *>(Data); 201801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Ptr[0] = (Value & 0xFF) >> 0; 202801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 203801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 204801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer//------------------------------------------------------------------------------ 205801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer// Symbol class implementation 206801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 20796f498bd9f140a98321c478f517877c4767b94faDmitri GribenkoCOFFSymbol::COFFSymbol(StringRef name) 208a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer : Name(name.begin(), name.end()) 209a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer , Other(NULL) 210a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer , Section(NULL) 211a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer , Relocations(0) 212a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer , MCData(NULL) { 213801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer memset(&Data, 0, sizeof(Data)); 214801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 215b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 216801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencersize_t COFFSymbol::size() const { 217801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer return COFF::SymbolSize + (Data.NumberOfAuxSymbols * COFF::SymbolSize); 218b162290e39afd49d4c7d342333b331bc96232720Chris Lattner} 219b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 220801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer// In the case that the name does not fit within 8 bytes, the offset 221801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer// into the string table is stored in the last 4 bytes instead, leaving 222801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer// the first 4 bytes as 0. 223801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencervoid COFFSymbol::set_name_offset(uint32_t Offset) { 224801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer write_uint32_le(Data.Name + 0, 0); 225801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer write_uint32_le(Data.Name + 4, Offset); 226801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 227801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 228a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer/// logic to decide if the symbol should be reported in the symbol table 229a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencerbool COFFSymbol::should_keep() const { 230a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // no section means its external, keep it 231a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (Section == NULL) 232a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer return true; 233a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 234a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // if it has relocations pointing at it, keep it 235a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (Relocations > 0) { 236a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer assert(Section->Number != -1 && "Sections with relocations must be real!"); 237a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer return true; 238a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer } 239a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 240a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // if the section its in is being droped, drop it 241a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (Section->Number == -1) 242a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer return false; 243a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 244a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // if it is the section symbol, keep it 245a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (Section->Symbol == this) 246a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer return true; 247a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 248a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // if its temporary, drop it 249a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (MCData && MCData->getSymbol().isTemporary()) 250a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer return false; 251a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 252a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // otherwise, keep it 253a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer return true; 254a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer} 255a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 256801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer//------------------------------------------------------------------------------ 257801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer// Section class implementation 258801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 25996f498bd9f140a98321c478f517877c4767b94faDmitri GribenkoCOFFSection::COFFSection(StringRef name) 260a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer : Name(name) 261a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer , MCData(NULL) 262a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer , Symbol(NULL) { 263801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer memset(&Header, 0, sizeof(Header)); 264801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 265801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 266801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencersize_t COFFSection::size() { 267801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer return COFF::SectionSize; 268801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 269801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 270801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer//------------------------------------------------------------------------------ 271801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer// StringTable class implementation 272801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 273801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer/// Write the length of the string table into Data. 274801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer/// The length of the string table includes uint32 length header. 275801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencervoid StringTable::update_length() { 276801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer write_uint32_le(&Data.front(), Data.size()); 277801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 278801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 279801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. SpencerStringTable::StringTable() { 280801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // The string table data begins with the length of the entire string table 281801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // including the length header. Allocate space for this header. 282801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Data.resize(4); 2830d64632c9e8a2632b8804bcc3fbc3523588862a7Michael J. Spencer update_length(); 284801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 285801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 286801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencersize_t StringTable::size() const { 287801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer return Data.size(); 288801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 289801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 29094c22716d60ff5edf6a98a3c67e0faa001be1142Sylvestre Ledru/// Add String to the table iff it is not already there. 291801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer/// @returns the index into the string table where the string is now located. 29296f498bd9f140a98321c478f517877c4767b94faDmitri Gribenkosize_t StringTable::insert(StringRef String) { 293801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer map::iterator i = Map.find(String); 294801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 295801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer if (i != Map.end()) 296801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer return i->second; 297801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 298801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer size_t Offset = Data.size(); 299801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 300801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Insert string data into string table. 301801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Data.insert(Data.end(), String.begin(), String.end()); 302801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Data.push_back('\0'); 303801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 304801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Put a reference to it in the map. 305801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Map[String] = Offset; 306801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 307801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Update the internal length field. 308801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer update_length(); 309801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 310801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer return Offset; 311801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 312801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 313801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer//------------------------------------------------------------------------------ 314801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer// WinCOFFObjectWriter class implementation 315801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 316df09270ae897e7fa64a7c162de163c32ee181a03Rafael EspindolaWinCOFFObjectWriter::WinCOFFObjectWriter(MCWinCOFFObjectTargetWriter *MOTW, 317df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola raw_ostream &OS) 31882c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer : MCObjectWriter(OS, true) 319df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola , TargetObjectWriter(MOTW) { 320801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer memset(&Header, 0, sizeof(Header)); 321da0bfcdaf95d95a66e306ef6d45f638939272d34Michael J. Spencer 322df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola Header.Machine = TargetObjectWriter->getMachine(); 323801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 324801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 325808ecfce6a312625bee5c0f4f9831a0d0ed01b16Benjamin KramerWinCOFFObjectWriter::~WinCOFFObjectWriter() { 326808ecfce6a312625bee5c0f4f9831a0d0ed01b16Benjamin Kramer for (symbols::iterator I = Symbols.begin(), E = Symbols.end(); I != E; ++I) 327808ecfce6a312625bee5c0f4f9831a0d0ed01b16Benjamin Kramer delete *I; 328808ecfce6a312625bee5c0f4f9831a0d0ed01b16Benjamin Kramer for (sections::iterator I = Sections.begin(), E = Sections.end(); I != E; ++I) 329808ecfce6a312625bee5c0f4f9831a0d0ed01b16Benjamin Kramer delete *I; 330808ecfce6a312625bee5c0f4f9831a0d0ed01b16Benjamin Kramer} 331808ecfce6a312625bee5c0f4f9831a0d0ed01b16Benjamin Kramer 3324cee2890a66974af506f2125243114cc14bd5556Michael J. SpencerCOFFSymbol *WinCOFFObjectWriter::createSymbol(StringRef Name) { 333801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer return createCOFFEntity<COFFSymbol>(Name, Symbols); 334801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 335801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 3364cee2890a66974af506f2125243114cc14bd5556Michael J. SpencerCOFFSymbol *WinCOFFObjectWriter::GetOrCreateCOFFSymbol(const MCSymbol * Symbol){ 3374cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer symbol_map::iterator i = SymbolMap.find(Symbol); 3384cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer if (i != SymbolMap.end()) 3394cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer return i->second; 3404cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer COFFSymbol *RetSymbol 3414cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer = createCOFFEntity<COFFSymbol>(Symbol->getName(), Symbols); 3424cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer SymbolMap[Symbol] = RetSymbol; 3434cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer return RetSymbol; 3444cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer} 3454cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer 34696f498bd9f140a98321c478f517877c4767b94faDmitri GribenkoCOFFSection *WinCOFFObjectWriter::createSection(StringRef Name) { 347801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer return createCOFFEntity<COFFSection>(Name, Sections); 348801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 349801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 350801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer/// A template used to lookup or create a symbol/section, and initialize it if 351801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer/// needed. 352801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencertemplate <typename object_t, typename list_t> 35396f498bd9f140a98321c478f517877c4767b94faDmitri Gribenkoobject_t *WinCOFFObjectWriter::createCOFFEntity(StringRef Name, 354801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer list_t &List) { 355a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer object_t *Object = new object_t(Name); 356801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 357801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer List.push_back(Object); 358801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 359801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer return Object; 360801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 361801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 362801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer/// This function takes a section data object from the assembler 363801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer/// and creates the associated COFF section staging object. 364801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencervoid WinCOFFObjectWriter::DefineSection(MCSectionData const &SectionData) { 365d47f4a9c982d264e46a6a2fe0f357288768bb5b9Michael J. Spencer assert(SectionData.getSection().getVariant() == MCSection::SV_COFF 366d47f4a9c982d264e46a6a2fe0f357288768bb5b9Michael J. Spencer && "Got non COFF section in the COFF backend!"); 367801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // FIXME: Not sure how to verify this (at least in a debug build). 368801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer MCSectionCOFF const &Sec = 369801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer static_cast<MCSectionCOFF const &>(SectionData.getSection()); 370801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 371801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer COFFSection *coff_section = createSection(Sec.getSectionName()); 372801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer COFFSymbol *coff_symbol = createSymbol(Sec.getSectionName()); 373801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 374a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer coff_section->Symbol = coff_symbol; 375a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer coff_symbol->Section = coff_section; 376801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_symbol->Data.StorageClass = COFF::IMAGE_SYM_CLASS_STATIC; 377801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 378801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // In this case the auxiliary symbol is a Section Definition. 379801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_symbol->Aux.resize(1); 380801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer memset(&coff_symbol->Aux[0], 0, sizeof(coff_symbol->Aux[0])); 381801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_symbol->Aux[0].AuxType = ATSectionDefinition; 382801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_symbol->Aux[0].Aux.SectionDefinition.Selection = Sec.getSelection(); 383801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 384801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_section->Header.Characteristics = Sec.getCharacteristics(); 385801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 386801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer uint32_t &Characteristics = coff_section->Header.Characteristics; 387801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer switch (SectionData.getAlignment()) { 388801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 1: Characteristics |= COFF::IMAGE_SCN_ALIGN_1BYTES; break; 389801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 2: Characteristics |= COFF::IMAGE_SCN_ALIGN_2BYTES; break; 390801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 4: Characteristics |= COFF::IMAGE_SCN_ALIGN_4BYTES; break; 391801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 8: Characteristics |= COFF::IMAGE_SCN_ALIGN_8BYTES; break; 392801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 16: Characteristics |= COFF::IMAGE_SCN_ALIGN_16BYTES; break; 393801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 32: Characteristics |= COFF::IMAGE_SCN_ALIGN_32BYTES; break; 394801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 64: Characteristics |= COFF::IMAGE_SCN_ALIGN_64BYTES; break; 395801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 128: Characteristics |= COFF::IMAGE_SCN_ALIGN_128BYTES; break; 396801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 256: Characteristics |= COFF::IMAGE_SCN_ALIGN_256BYTES; break; 397801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 512: Characteristics |= COFF::IMAGE_SCN_ALIGN_512BYTES; break; 398801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 1024: Characteristics |= COFF::IMAGE_SCN_ALIGN_1024BYTES; break; 399801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 2048: Characteristics |= COFF::IMAGE_SCN_ALIGN_2048BYTES; break; 400801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 4096: Characteristics |= COFF::IMAGE_SCN_ALIGN_4096BYTES; break; 401801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 8192: Characteristics |= COFF::IMAGE_SCN_ALIGN_8192BYTES; break; 402801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer default: 403801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer llvm_unreachable("unsupported section alignment"); 404801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 405801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 406801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Bind internal COFF section to MC section. 407801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_section->MCData = &SectionData; 4084cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer SectionMap[&SectionData.getSection()] = coff_section; 409801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 410801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 411801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer/// This function takes a section data object from the assembler 412801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer/// and creates the associated COFF symbol staging object. 4134974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbournevoid WinCOFFObjectWriter::DefineSymbol(MCSymbolData const &SymbolData, 414a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer MCAssembler &Assembler) { 4154974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne MCSymbol const &Symbol = SymbolData.getSymbol(); 4160933134a304b47d3767aad202df9f0e09743da6dMichael J. Spencer COFFSymbol *coff_symbol = GetOrCreateCOFFSymbol(&Symbol); 4174974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne SymbolMap[&Symbol] = coff_symbol; 418801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 4194cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer if (SymbolData.getFlags() & COFF::SF_WeakExternal) { 420801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_symbol->Data.StorageClass = COFF::IMAGE_SYM_CLASS_WEAK_EXTERNAL; 421801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 4220933134a304b47d3767aad202df9f0e09743da6dMichael J. Spencer if (Symbol.isVariable()) { 4234974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne const MCSymbolRefExpr *SymRef = 4244974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne dyn_cast<MCSymbolRefExpr>(Symbol.getVariableValue()); 425801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 4264974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne if (!SymRef) 4274974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne report_fatal_error("Weak externals may only alias symbols"); 428801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 4294974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne coff_symbol->Other = GetOrCreateCOFFSymbol(&SymRef->getSymbol()); 4304cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer } else { 4314cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer std::string WeakName = std::string(".weak.") 4320933134a304b47d3767aad202df9f0e09743da6dMichael J. Spencer + Symbol.getName().str() 4334cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer + ".default"; 4344cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer COFFSymbol *WeakDefault = createSymbol(WeakName); 4354cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer WeakDefault->Data.SectionNumber = COFF::IMAGE_SYM_ABSOLUTE; 4364cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer WeakDefault->Data.StorageClass = COFF::IMAGE_SYM_CLASS_EXTERNAL; 4374cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer WeakDefault->Data.Type = 0; 4384cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer WeakDefault->Data.Value = 0; 4394cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer coff_symbol->Other = WeakDefault; 4404cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer } 441801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 442801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Setup the Weak External auxiliary symbol. 443801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_symbol->Aux.resize(1); 444801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer memset(&coff_symbol->Aux[0], 0, sizeof(coff_symbol->Aux[0])); 445801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_symbol->Aux[0].AuxType = ATWeakExternal; 446801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_symbol->Aux[0].Aux.WeakExternal.TagIndex = 0; 447801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_symbol->Aux[0].Aux.WeakExternal.Characteristics = 4484cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer COFF::IMAGE_WEAK_EXTERN_SEARCH_LIBRARY; 4494cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer 4504974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne coff_symbol->MCData = &SymbolData; 4514974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne } else { 4524974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne const MCSymbolData &ResSymData = 4534974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne Assembler.getSymbolData(Symbol.AliasedSymbol()); 4544cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer 4554974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne coff_symbol->Data.Type = (ResSymData.getFlags() & 0x0000FFFF) >> 0; 4564974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne coff_symbol->Data.StorageClass = (ResSymData.getFlags() & 0x00FF0000) >> 16; 457801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 4584974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne // If no storage class was specified in the streamer, define it here. 4594974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne if (coff_symbol->Data.StorageClass == 0) { 4604974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne bool external = ResSymData.isExternal() || (ResSymData.Fragment == NULL); 461a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 4624974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne coff_symbol->Data.StorageClass = 4634974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne external ? COFF::IMAGE_SYM_CLASS_EXTERNAL : COFF::IMAGE_SYM_CLASS_STATIC; 4644974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne } 4654974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne 4664974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne if (ResSymData.Fragment != NULL) 4674974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne coff_symbol->Section = 4684974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne SectionMap[&ResSymData.Fragment->getParent()->getSection()]; 4694974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne 4704974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne coff_symbol->MCData = &ResSymData; 4714974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne } 472801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 473801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 474a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer/// making a section real involves assigned it a number and putting 475a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer/// name into the string table if needed 476a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencervoid WinCOFFObjectWriter::MakeSectionReal(COFFSection &S, size_t Number) { 477a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (S.Name.size() > COFF::NameSize) { 478c63dce3c59ac24b2656e06f7017cd4dce4bf733cNico Rieck const unsigned Max6DecimalSize = 999999; 479c63dce3c59ac24b2656e06f7017cd4dce4bf733cNico Rieck const unsigned Max7DecimalSize = 9999999; 480c63dce3c59ac24b2656e06f7017cd4dce4bf733cNico Rieck uint64_t StringTableEntry = Strings.insert(S.Name.c_str()); 481c63dce3c59ac24b2656e06f7017cd4dce4bf733cNico Rieck 482c63dce3c59ac24b2656e06f7017cd4dce4bf733cNico Rieck if (StringTableEntry <= Max6DecimalSize) { 483c63dce3c59ac24b2656e06f7017cd4dce4bf733cNico Rieck std::sprintf(S.Header.Name, "/%d", unsigned(StringTableEntry)); 484c63dce3c59ac24b2656e06f7017cd4dce4bf733cNico Rieck } else if (StringTableEntry <= Max7DecimalSize) { 485c63dce3c59ac24b2656e06f7017cd4dce4bf733cNico Rieck // With seven digits, we have to skip the terminating null. Because 486c63dce3c59ac24b2656e06f7017cd4dce4bf733cNico Rieck // sprintf always appends it, we use a larger temporary buffer. 487c63dce3c59ac24b2656e06f7017cd4dce4bf733cNico Rieck char buffer[9] = { }; 488c63dce3c59ac24b2656e06f7017cd4dce4bf733cNico Rieck std::sprintf(buffer, "/%d", unsigned(StringTableEntry)); 489c63dce3c59ac24b2656e06f7017cd4dce4bf733cNico Rieck std::memcpy(S.Header.Name, buffer, 8); 490c63dce3c59ac24b2656e06f7017cd4dce4bf733cNico Rieck } else { 491c63dce3c59ac24b2656e06f7017cd4dce4bf733cNico Rieck report_fatal_error("COFF string table is greater than 9,999,999 bytes."); 492c63dce3c59ac24b2656e06f7017cd4dce4bf733cNico Rieck } 493a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer } else 494a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer std::memcpy(S.Header.Name, S.Name.c_str(), S.Name.size()); 495a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 496a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer S.Number = Number; 497a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer S.Symbol->Data.SectionNumber = S.Number; 498a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer S.Symbol->Aux[0].Aux.SectionDefinition.Number = S.Number; 499a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer} 500a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 501a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencervoid WinCOFFObjectWriter::MakeSymbolReal(COFFSymbol &S, size_t Index) { 502a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (S.Name.size() > COFF::NameSize) { 503a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer size_t StringTableEntry = Strings.insert(S.Name.c_str()); 504a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 505a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer S.set_name_offset(StringTableEntry); 506a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer } else 507a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer std::memcpy(S.Data.Name, S.Name.c_str(), S.Name.size()); 508a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer S.Index = Index; 509a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer} 510a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 511a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencerbool WinCOFFObjectWriter::ExportSection(COFFSection const *S) { 512a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer return !S->MCData->getFragmentList().empty(); 513801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 514801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 515801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerbool WinCOFFObjectWriter::ExportSymbol(MCSymbolData const &SymbolData, 516801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer MCAssembler &Asm) { 517801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // This doesn't seem to be right. Strings referred to from the .data section 518801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // need symbols so they can be linked to code in the .text section right? 519801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 520801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // return Asm.isSymbolLinkerVisible (&SymbolData); 521801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 522a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // For now, all non-variable symbols are exported, 523a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // the linker will sort the rest out for us. 5244cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer return SymbolData.isExternal() || !SymbolData.getSymbol().isVariable(); 525a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer} 526a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 527a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencerbool WinCOFFObjectWriter::IsPhysicalSection(COFFSection *S) { 528a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer return (S->Header.Characteristics 529a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA) == 0; 530801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 531801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 532801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer//------------------------------------------------------------------------------ 533801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer// entity writing methods 534801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 535801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencervoid WinCOFFObjectWriter::WriteFileHeader(const COFF::header &Header) { 536801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(Header.Machine); 537801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(Header.NumberOfSections); 538801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(Header.TimeDateStamp); 539801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(Header.PointerToSymbolTable); 540801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(Header.NumberOfSymbols); 541801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(Header.SizeOfOptionalHeader); 542801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(Header.Characteristics); 543801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 544801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 545801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencervoid WinCOFFObjectWriter::WriteSymbol(const COFFSymbol *S) { 546801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteBytes(StringRef(S->Data.Name, COFF::NameSize)); 547801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(S->Data.Value); 548801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(S->Data.SectionNumber); 549801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(S->Data.Type); 550801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Write8(S->Data.StorageClass); 551801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Write8(S->Data.NumberOfAuxSymbols); 552801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteAuxiliarySymbols(S->Aux); 553801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 554801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 555801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencervoid WinCOFFObjectWriter::WriteAuxiliarySymbols( 556801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer const COFFSymbol::AuxiliarySymbols &S) { 557801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for(COFFSymbol::AuxiliarySymbols::const_iterator i = S.begin(), e = S.end(); 558801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer i != e; ++i) { 559801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer switch(i->AuxType) { 560801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case ATFunctionDefinition: 561801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(i->Aux.FunctionDefinition.TagIndex); 562801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(i->Aux.FunctionDefinition.TotalSize); 563801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(i->Aux.FunctionDefinition.PointerToLinenumber); 564801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(i->Aux.FunctionDefinition.PointerToNextFunction); 565801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteZeros(sizeof(i->Aux.FunctionDefinition.unused)); 566801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer break; 567801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case ATbfAndefSymbol: 568801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteZeros(sizeof(i->Aux.bfAndefSymbol.unused1)); 569801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(i->Aux.bfAndefSymbol.Linenumber); 570801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteZeros(sizeof(i->Aux.bfAndefSymbol.unused2)); 571801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(i->Aux.bfAndefSymbol.PointerToNextFunction); 572801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteZeros(sizeof(i->Aux.bfAndefSymbol.unused3)); 573801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer break; 574801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case ATWeakExternal: 575801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(i->Aux.WeakExternal.TagIndex); 576801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(i->Aux.WeakExternal.Characteristics); 577801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteZeros(sizeof(i->Aux.WeakExternal.unused)); 578801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer break; 579801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case ATFile: 580801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteBytes(StringRef(reinterpret_cast<const char *>(i->Aux.File.FileName), 581801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer sizeof(i->Aux.File.FileName))); 582801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer break; 583801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case ATSectionDefinition: 584801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(i->Aux.SectionDefinition.Length); 585801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(i->Aux.SectionDefinition.NumberOfRelocations); 586801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(i->Aux.SectionDefinition.NumberOfLinenumbers); 587801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(i->Aux.SectionDefinition.CheckSum); 588801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(i->Aux.SectionDefinition.Number); 589801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Write8(i->Aux.SectionDefinition.Selection); 590801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteZeros(sizeof(i->Aux.SectionDefinition.unused)); 591801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer break; 592801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 593801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 594801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 595801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 596801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencervoid WinCOFFObjectWriter::WriteSectionHeader(const COFF::section &S) { 597801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteBytes(StringRef(S.Name, COFF::NameSize)); 598801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 599801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(S.VirtualSize); 600801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(S.VirtualAddress); 601801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(S.SizeOfRawData); 602801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(S.PointerToRawData); 603801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(S.PointerToRelocations); 604801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(S.PointerToLineNumbers); 605801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(S.NumberOfRelocations); 606801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(S.NumberOfLineNumbers); 607801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(S.Characteristics); 608801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 609801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 610801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencervoid WinCOFFObjectWriter::WriteRelocation(const COFF::relocation &R) { 611801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(R.VirtualAddress); 612801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(R.SymbolTableIndex); 613801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(R.Type); 614b162290e39afd49d4c7d342333b331bc96232720Chris Lattner} 615b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 616b162290e39afd49d4c7d342333b331bc96232720Chris Lattner//////////////////////////////////////////////////////////////////////////////// 617b162290e39afd49d4c7d342333b331bc96232720Chris Lattner// MCObjectWriter interface implementations 618b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 61985f2ecc697a8ca6c8cf08093054cbbb9d2060ccfRafael Espindolavoid WinCOFFObjectWriter::ExecutePostLayoutBinding(MCAssembler &Asm, 62085f2ecc697a8ca6c8cf08093054cbbb9d2060ccfRafael Espindola const MCAsmLayout &Layout) { 621801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // "Define" each section & symbol. This creates section & symbol 622a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // entries in the staging area. 623801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 624801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for (MCAssembler::const_iterator i = Asm.begin(), e = Asm.end(); i != e; i++) 625801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer DefineSection(*i); 626801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 627801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for (MCAssembler::const_symbol_iterator i = Asm.symbol_begin(), 628801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer e = Asm.symbol_end(); i != e; i++) { 6290933134a304b47d3767aad202df9f0e09743da6dMichael J. Spencer if (ExportSymbol(*i, Asm)) { 6304974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne DefineSymbol(*i, Asm); 6310933134a304b47d3767aad202df9f0e09743da6dMichael J. Spencer } 632801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 633b162290e39afd49d4c7d342333b331bc96232720Chris Lattner} 634b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 635b162290e39afd49d4c7d342333b331bc96232720Chris Lattnervoid WinCOFFObjectWriter::RecordRelocation(const MCAssembler &Asm, 636b162290e39afd49d4c7d342333b331bc96232720Chris Lattner const MCAsmLayout &Layout, 637b162290e39afd49d4c7d342333b331bc96232720Chris Lattner const MCFragment *Fragment, 638b162290e39afd49d4c7d342333b331bc96232720Chris Lattner const MCFixup &Fixup, 639b162290e39afd49d4c7d342333b331bc96232720Chris Lattner MCValue Target, 640b162290e39afd49d4c7d342333b331bc96232720Chris Lattner uint64_t &FixedValue) { 641801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer assert(Target.getSymA() != NULL && "Relocation must reference a symbol!"); 64282c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer 6436057eb7ab697fcd0feb3cdd55e9a497cfe0aff72Reid Kleckner const MCSymbol &Symbol = Target.getSymA()->getSymbol(); 6446057eb7ab697fcd0feb3cdd55e9a497cfe0aff72Reid Kleckner const MCSymbol &A = Symbol.AliasedSymbol(); 6456057eb7ab697fcd0feb3cdd55e9a497cfe0aff72Reid Kleckner MCSymbolData &A_SD = Asm.getSymbolData(A); 646801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 647801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer MCSectionData const *SectionData = Fragment->getParent(); 648801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 64982c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer // Mark this symbol as requiring an entry in the symbol table. 6504cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer assert(SectionMap.find(&SectionData->getSection()) != SectionMap.end() && 651801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer "Section must already have been defined in ExecutePostLayoutBinding!"); 6524cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer assert(SymbolMap.find(&A_SD.getSymbol()) != SymbolMap.end() && 653801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer "Symbol must already have been defined in ExecutePostLayoutBinding!"); 654801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 6554cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer COFFSection *coff_section = SectionMap[&SectionData->getSection()]; 6564cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer COFFSymbol *coff_symbol = SymbolMap[&A_SD.getSymbol()]; 6573660a847f1820d73847539f3959dc069396f8e44Rafael Espindola const MCSymbolRefExpr *SymA = Target.getSymA(); 6583660a847f1820d73847539f3959dc069396f8e44Rafael Espindola const MCSymbolRefExpr *SymB = Target.getSymB(); 6593660a847f1820d73847539f3959dc069396f8e44Rafael Espindola const bool CrossSection = SymB && 6603660a847f1820d73847539f3959dc069396f8e44Rafael Espindola &SymA->getSymbol().getSection() != &SymB->getSymbol().getSection(); 66182c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer 66282c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer if (Target.getSymB()) { 66382c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer const MCSymbol *B = &Target.getSymB()->getSymbol(); 66482c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer MCSymbolData &B_SD = Asm.getSymbolData(*B); 665801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 6661ac7fe0f4dae8a9266fa6ff31ea4939ec64a3e5eRafael Espindola // Offset of the symbol in the section 6671ac7fe0f4dae8a9266fa6ff31ea4939ec64a3e5eRafael Espindola int64_t a = Layout.getSymbolOffset(&B_SD); 66882c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer 6691ac7fe0f4dae8a9266fa6ff31ea4939ec64a3e5eRafael Espindola // Ofeset of the relocation in the section 6701ac7fe0f4dae8a9266fa6ff31ea4939ec64a3e5eRafael Espindola int64_t b = Layout.getFragmentOffset(Fragment) + Fixup.getOffset(); 6711ac7fe0f4dae8a9266fa6ff31ea4939ec64a3e5eRafael Espindola 6721ac7fe0f4dae8a9266fa6ff31ea4939ec64a3e5eRafael Espindola FixedValue = b - a; 67382c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer // In the case where we have SymbA and SymB, we just need to store the delta 67482c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer // between the two symbols. Update FixedValue to account for the delta, and 67582c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer // skip recording the relocation. 6763660a847f1820d73847539f3959dc069396f8e44Rafael Espindola if (!CrossSection) 6773660a847f1820d73847539f3959dc069396f8e44Rafael Espindola return; 67882c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer } else { 67982c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer FixedValue = Target.getConstant(); 68082c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer } 681801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 682801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer COFFRelocation Reloc; 683801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 684425f634917542d7f09c189e2eb130752c6a12d2cDaniel Dunbar Reloc.Data.SymbolTableIndex = 0; 685801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Reloc.Data.VirtualAddress = Layout.getFragmentOffset(Fragment); 686a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 687ea1104a4c376634ed8eb693f6c71e0ac51074949Michael J. Spencer // Turn relocations for temporary symbols into section relocations. 6883660a847f1820d73847539f3959dc069396f8e44Rafael Espindola if (coff_symbol->MCData->getSymbol().isTemporary() || CrossSection) { 689a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer Reloc.Symb = coff_symbol->Section->Symbol; 690eb6e77f8cccd14cdba995ff8231f2c9faea9bfccMichael J. Spencer FixedValue += Layout.getFragmentOffset(coff_symbol->MCData->Fragment) 691eb6e77f8cccd14cdba995ff8231f2c9faea9bfccMichael J. Spencer + coff_symbol->MCData->getOffset(); 692a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer } else 693a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer Reloc.Symb = coff_symbol; 694a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 695a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer ++Reloc.Symb->Relocations; 696801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 697801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Reloc.Data.VirtualAddress += Fixup.getOffset(); 69818d49acdab79d6f0966b47182b6c3a2ba3d9f80fNico Rieck Reloc.Data.Type = TargetObjectWriter->getRelocType(Target, Fixup, 69918d49acdab79d6f0966b47182b6c3a2ba3d9f80fNico Rieck CrossSection); 700b156c5d3765637393eda28b04b7fc1e5c55675ebRafael Espindola 701b156c5d3765637393eda28b04b7fc1e5c55675ebRafael Espindola // FIXME: Can anyone explain what this does other than adjust for the size 702b156c5d3765637393eda28b04b7fc1e5c55675ebRafael Espindola // of the offset? 703b156c5d3765637393eda28b04b7fc1e5c55675ebRafael Espindola if (Reloc.Data.Type == COFF::IMAGE_REL_AMD64_REL32 || 704b156c5d3765637393eda28b04b7fc1e5c55675ebRafael Espindola Reloc.Data.Type == COFF::IMAGE_REL_I386_REL32) 70582c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer FixedValue += 4; 706801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 707801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_section->Relocations.push_back(Reloc); 708b162290e39afd49d4c7d342333b331bc96232720Chris Lattner} 709b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 7108f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindolavoid WinCOFFObjectWriter::WriteObject(MCAssembler &Asm, 711b162290e39afd49d4c7d342333b331bc96232720Chris Lattner const MCAsmLayout &Layout) { 712801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Assign symbol and section indexes and offsets. 713a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer Header.NumberOfSections = 0; 714a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 71580646283796b20c6a1b7d8eb69ce6f0478d54383Nico Rieck DenseMap<COFFSection *, uint16_t> SectionIndices; 716a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer for (sections::iterator i = Sections.begin(), 717a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer e = Sections.end(); i != e; i++) { 71885f2ecc697a8ca6c8cf08093054cbbb9d2060ccfRafael Espindola if (Layout.getSectionAddressSize((*i)->MCData) > 0) { 71980646283796b20c6a1b7d8eb69ce6f0478d54383Nico Rieck size_t Number = ++Header.NumberOfSections; 72080646283796b20c6a1b7d8eb69ce6f0478d54383Nico Rieck SectionIndices[*i] = Number; 72180646283796b20c6a1b7d8eb69ce6f0478d54383Nico Rieck MakeSectionReal(**i, Number); 722a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer } else { 723a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer (*i)->Number = -1; 724a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer } 725a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer } 726801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 727801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Header.NumberOfSymbols = 0; 728801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 729801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for (symbols::iterator i = Symbols.begin(), e = Symbols.end(); i != e; i++) { 730801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer COFFSymbol *coff_symbol = *i; 731801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer MCSymbolData const *SymbolData = coff_symbol->MCData; 732801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 733801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Update section number & offset for symbols that have them. 734801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer if ((SymbolData != NULL) && (SymbolData->Fragment != NULL)) { 735a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer assert(coff_symbol->Section != NULL); 736801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 737a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer coff_symbol->Data.SectionNumber = coff_symbol->Section->Number; 738237f8fe5df628065874b8590b364d04dfc2686fdMichael J. Spencer coff_symbol->Data.Value = Layout.getFragmentOffset(SymbolData->Fragment) 739237f8fe5df628065874b8590b364d04dfc2686fdMichael J. Spencer + SymbolData->Offset; 740801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 741801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 742a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (coff_symbol->should_keep()) { 743a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer MakeSymbolReal(*coff_symbol, Header.NumberOfSymbols++); 744a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 745a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // Update auxiliary symbol info. 746a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer coff_symbol->Data.NumberOfAuxSymbols = coff_symbol->Aux.size(); 747a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer Header.NumberOfSymbols += coff_symbol->Data.NumberOfAuxSymbols; 748a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer } else 749a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer coff_symbol->Index = -1; 750801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 751801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 752801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Fixup weak external references. 753801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for (symbols::iterator i = Symbols.begin(), e = Symbols.end(); i != e; i++) { 754a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer COFFSymbol *coff_symbol = *i; 755a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (coff_symbol->Other != NULL) { 756a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer assert(coff_symbol->Index != -1); 757a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer assert(coff_symbol->Aux.size() == 1 && 758801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer "Symbol must contain one aux symbol!"); 759a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer assert(coff_symbol->Aux[0].AuxType == ATWeakExternal && 760801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer "Symbol's aux symbol must be a Weak External!"); 761a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer coff_symbol->Aux[0].Aux.WeakExternal.TagIndex = coff_symbol->Other->Index; 762801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 763801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 764801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 76580646283796b20c6a1b7d8eb69ce6f0478d54383Nico Rieck // Fixup associative COMDAT sections. 76680646283796b20c6a1b7d8eb69ce6f0478d54383Nico Rieck for (sections::iterator i = Sections.begin(), 76780646283796b20c6a1b7d8eb69ce6f0478d54383Nico Rieck e = Sections.end(); i != e; i++) { 76880646283796b20c6a1b7d8eb69ce6f0478d54383Nico Rieck if ((*i)->Symbol->Aux[0].Aux.SectionDefinition.Selection != 76980646283796b20c6a1b7d8eb69ce6f0478d54383Nico Rieck COFF::IMAGE_COMDAT_SELECT_ASSOCIATIVE) 77080646283796b20c6a1b7d8eb69ce6f0478d54383Nico Rieck continue; 77180646283796b20c6a1b7d8eb69ce6f0478d54383Nico Rieck 77280646283796b20c6a1b7d8eb69ce6f0478d54383Nico Rieck const MCSectionCOFF &MCSec = static_cast<const MCSectionCOFF &>( 77380646283796b20c6a1b7d8eb69ce6f0478d54383Nico Rieck (*i)->MCData->getSection()); 77480646283796b20c6a1b7d8eb69ce6f0478d54383Nico Rieck 77580646283796b20c6a1b7d8eb69ce6f0478d54383Nico Rieck COFFSection *Assoc = SectionMap.lookup(MCSec.getAssocSection()); 77680646283796b20c6a1b7d8eb69ce6f0478d54383Nico Rieck if (!Assoc) { 77780646283796b20c6a1b7d8eb69ce6f0478d54383Nico Rieck report_fatal_error(Twine("Missing associated COMDAT section ") + 77880646283796b20c6a1b7d8eb69ce6f0478d54383Nico Rieck MCSec.getAssocSection()->getSectionName() + 77980646283796b20c6a1b7d8eb69ce6f0478d54383Nico Rieck " for section " + MCSec.getSectionName()); 78080646283796b20c6a1b7d8eb69ce6f0478d54383Nico Rieck } 78180646283796b20c6a1b7d8eb69ce6f0478d54383Nico Rieck 78280646283796b20c6a1b7d8eb69ce6f0478d54383Nico Rieck // Skip this section if the associated section is unused. 78380646283796b20c6a1b7d8eb69ce6f0478d54383Nico Rieck if (Assoc->Number == -1) 78480646283796b20c6a1b7d8eb69ce6f0478d54383Nico Rieck continue; 78580646283796b20c6a1b7d8eb69ce6f0478d54383Nico Rieck 78680646283796b20c6a1b7d8eb69ce6f0478d54383Nico Rieck (*i)->Symbol->Aux[0].Aux.SectionDefinition.Number = SectionIndices[Assoc]; 78780646283796b20c6a1b7d8eb69ce6f0478d54383Nico Rieck } 78880646283796b20c6a1b7d8eb69ce6f0478d54383Nico Rieck 78980646283796b20c6a1b7d8eb69ce6f0478d54383Nico Rieck 790801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Assign file offsets to COFF object file structures. 791801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 792801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer unsigned offset = 0; 793801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 794801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer offset += COFF::HeaderSize; 795a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer offset += COFF::SectionSize * Header.NumberOfSections; 796801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 797801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for (MCAssembler::const_iterator i = Asm.begin(), 798801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer e = Asm.end(); 799801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer i != e; i++) { 8004cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer COFFSection *Sec = SectionMap[&i->getSection()]; 801801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 802a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (Sec->Number == -1) 803a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer continue; 804a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 80528ca86aa19fe2a5493573164ef0c2c54542ed9daMichael J. Spencer Sec->Header.SizeOfRawData = Layout.getSectionAddressSize(i); 806801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 807a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (IsPhysicalSection(Sec)) { 808801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Sec->Header.PointerToRawData = offset; 809801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 810801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer offset += Sec->Header.SizeOfRawData; 811801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 812801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 813801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer if (Sec->Relocations.size() > 0) { 814d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer bool RelocationsOverflow = Sec->Relocations.size() >= 0xffff; 815d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer 816d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer if (RelocationsOverflow) { 817d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer // Signal overflow by setting NumberOfSections to max value. Actual 818d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer // size is found in reloc #0. Microsoft tools understand this. 819d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer Sec->Header.NumberOfRelocations = 0xffff; 820d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer } else { 821d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer Sec->Header.NumberOfRelocations = Sec->Relocations.size(); 822d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer } 823801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Sec->Header.PointerToRelocations = offset; 824801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 825d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer if (RelocationsOverflow) { 826d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer // Reloc #0 will contain actual count, so make room for it. 827d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer offset += COFF::RelocationSize; 828d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer } 829d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer 830801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer offset += COFF::RelocationSize * Sec->Relocations.size(); 831801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 832801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for (relocations::iterator cr = Sec->Relocations.begin(), 833801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer er = Sec->Relocations.end(); 834a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer cr != er; ++cr) { 835a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer assert((*cr).Symb->Index != -1); 836801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer (*cr).Data.SymbolTableIndex = (*cr).Symb->Index; 837801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 838801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 839801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 840a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer assert(Sec->Symbol->Aux.size() == 1 841a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer && "Section's symbol must have one aux!"); 842a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer AuxSymbol &Aux = Sec->Symbol->Aux[0]; 843801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer assert(Aux.AuxType == ATSectionDefinition && 844801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer "Section's symbol's aux symbol must be a Section Definition!"); 845801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Aux.Aux.SectionDefinition.Length = Sec->Header.SizeOfRawData; 846801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Aux.Aux.SectionDefinition.NumberOfRelocations = 847801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Sec->Header.NumberOfRelocations; 848801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Aux.Aux.SectionDefinition.NumberOfLinenumbers = 849801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Sec->Header.NumberOfLineNumbers; 850801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 851801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 852801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Header.PointerToSymbolTable = offset; 853801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 854ab3de49c48bd3282421ce24323fb6b868a3da6ccMichael J. Spencer Header.TimeDateStamp = sys::TimeValue::now().toEpochTime(); 855ab3de49c48bd3282421ce24323fb6b868a3da6ccMichael J. Spencer 856801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Write it all to disk... 857801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteFileHeader(Header); 858801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 859801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer { 860801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer sections::iterator i, ie; 861801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer MCAssembler::const_iterator j, je; 862801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 863801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for (i = Sections.begin(), ie = Sections.end(); i != ie; i++) 864d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer if ((*i)->Number != -1) { 865d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer if ((*i)->Relocations.size() >= 0xffff) { 866d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer (*i)->Header.Characteristics |= COFF::IMAGE_SCN_LNK_NRELOC_OVFL; 867d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer } 868a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer WriteSectionHeader((*i)->Header); 869d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer } 870801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 871801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for (i = Sections.begin(), ie = Sections.end(), 872801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer j = Asm.begin(), je = Asm.end(); 873a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer (i != ie) && (j != je); ++i, ++j) { 874a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 875a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if ((*i)->Number == -1) 876a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer continue; 877a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 878801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer if ((*i)->Header.PointerToRawData != 0) { 879801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer assert(OS.tell() == (*i)->Header.PointerToRawData && 880801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer "Section::PointerToRawData is insane!"); 881801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 882f77d5b14af6b92403b93f7ed249f9023e99028ccJim Grosbach Asm.writeSectionData(j, Layout); 883801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 884801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 885801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer if ((*i)->Relocations.size() > 0) { 886801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer assert(OS.tell() == (*i)->Header.PointerToRelocations && 887801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer "Section::PointerToRelocations is insane!"); 888801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 889d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer if ((*i)->Relocations.size() >= 0xffff) { 890d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer // In case of overflow, write actual relocation count as first 891d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer // relocation. Including the synthetic reloc itself (+ 1). 892d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer COFF::relocation r; 893d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer r.VirtualAddress = (*i)->Relocations.size() + 1; 894d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer r.SymbolTableIndex = 0; 895d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer r.Type = 0; 896d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer WriteRelocation(r); 897d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer } 898d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer 899801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for (relocations::const_iterator k = (*i)->Relocations.begin(), 900801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer ke = (*i)->Relocations.end(); 901801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer k != ke; k++) { 902801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteRelocation(k->Data); 903801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 904801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } else 905801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer assert((*i)->Header.PointerToRelocations == 0 && 906801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer "Section::PointerToRelocations is insane!"); 907801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 908801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 909801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 910801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer assert(OS.tell() == Header.PointerToSymbolTable && 911801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer "Header::PointerToSymbolTable is insane!"); 912801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 913801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for (symbols::iterator i = Symbols.begin(), e = Symbols.end(); i != e; i++) 914a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if ((*i)->Index != -1) 915a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer WriteSymbol(*i); 916801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 917801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer OS.write((char const *)&Strings.Data.front(), Strings.Data.size()); 918b162290e39afd49d4c7d342333b331bc96232720Chris Lattner} 919b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 920df09270ae897e7fa64a7c162de163c32ee181a03Rafael EspindolaMCWinCOFFObjectTargetWriter::MCWinCOFFObjectTargetWriter(unsigned Machine_) : 921df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola Machine(Machine_) { 922df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola} 923df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola 924b162290e39afd49d4c7d342333b331bc96232720Chris Lattner//------------------------------------------------------------------------------ 925b162290e39afd49d4c7d342333b331bc96232720Chris Lattner// WinCOFFObjectWriter factory function 926b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 927b162290e39afd49d4c7d342333b331bc96232720Chris Lattnernamespace llvm { 928df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola MCObjectWriter *createWinCOFFObjectWriter(MCWinCOFFObjectTargetWriter *MOTW, 929df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola raw_ostream &OS) { 930df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola return new WinCOFFObjectWriter(MOTW, OS); 931b162290e39afd49d4c7d342333b331bc96232720Chris Lattner } 932933304ef0c3ec18c23d0b385c2117a6eae790430Michael J. Spencer} 933