WinCOFFObjectWriter.cpp revision 4974b972e7dd94fad74ada4df32a12aba09c4de0
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); 1504974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne void DefineSymbol(MCSymbolData const &SymbolData, 1510933134a304b47d3767aad202df9f0e09743da6dMichael J. Spencer MCAssembler &Assembler); 152801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 153a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer void MakeSymbolReal(COFFSymbol &S, size_t Index); 154a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer void MakeSectionReal(COFFSection &S, size_t Number); 155a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 156a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer bool ExportSection(COFFSection const *S); 157801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer bool ExportSymbol(MCSymbolData const &SymbolData, MCAssembler &Asm); 158801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 159a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer bool IsPhysicalSection(COFFSection *S); 160a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 161801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Entity writing methods. 162801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 163801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer void WriteFileHeader(const COFF::header &Header); 164801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer void WriteSymbol(const COFFSymbol *S); 165801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer void WriteAuxiliarySymbols(const COFFSymbol::AuxiliarySymbols &S); 166801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer void WriteSectionHeader(const COFF::section &S); 167801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer void WriteRelocation(const COFF::relocation &R); 168801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 169801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // MCObjectWriter interface implementation. 170801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 17185f2ecc697a8ca6c8cf08093054cbbb9d2060ccfRafael Espindola void ExecutePostLayoutBinding(MCAssembler &Asm, const MCAsmLayout &Layout); 172801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 173801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer void RecordRelocation(const MCAssembler &Asm, 174801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer const MCAsmLayout &Layout, 175801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer const MCFragment *Fragment, 176801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer const MCFixup &Fixup, 177801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer MCValue Target, 178801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer uint64_t &FixedValue); 179801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 1808f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola void WriteObject(MCAssembler &Asm, const MCAsmLayout &Layout); 181801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer}; 182801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 183801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 184801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerstatic inline void write_uint32_le(void *Data, uint32_t const &Value) { 185801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer uint8_t *Ptr = reinterpret_cast<uint8_t *>(Data); 186801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Ptr[0] = (Value & 0x000000FF) >> 0; 187801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Ptr[1] = (Value & 0x0000FF00) >> 8; 188801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Ptr[2] = (Value & 0x00FF0000) >> 16; 189801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Ptr[3] = (Value & 0xFF000000) >> 24; 190801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 191801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 192801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerstatic inline void write_uint16_le(void *Data, uint16_t const &Value) { 193801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer uint8_t *Ptr = reinterpret_cast<uint8_t *>(Data); 194801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Ptr[0] = (Value & 0x00FF) >> 0; 195801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Ptr[1] = (Value & 0xFF00) >> 8; 196801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 197801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 198801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerstatic inline void write_uint8_le(void *Data, uint8_t const &Value) { 199801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer uint8_t *Ptr = reinterpret_cast<uint8_t *>(Data); 200801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Ptr[0] = (Value & 0xFF) >> 0; 201801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 202801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 203801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer//------------------------------------------------------------------------------ 204801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer// Symbol class implementation 205801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 20696f498bd9f140a98321c478f517877c4767b94faDmitri GribenkoCOFFSymbol::COFFSymbol(StringRef name) 207a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer : Name(name.begin(), name.end()) 208a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer , Other(NULL) 209a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer , Section(NULL) 210a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer , Relocations(0) 211a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer , MCData(NULL) { 212801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer memset(&Data, 0, sizeof(Data)); 213801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 214b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 215801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencersize_t COFFSymbol::size() const { 216801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer return COFF::SymbolSize + (Data.NumberOfAuxSymbols * COFF::SymbolSize); 217b162290e39afd49d4c7d342333b331bc96232720Chris Lattner} 218b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 219801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer// In the case that the name does not fit within 8 bytes, the offset 220801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer// into the string table is stored in the last 4 bytes instead, leaving 221801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer// the first 4 bytes as 0. 222801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencervoid COFFSymbol::set_name_offset(uint32_t Offset) { 223801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer write_uint32_le(Data.Name + 0, 0); 224801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer write_uint32_le(Data.Name + 4, Offset); 225801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 226801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 227a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer/// logic to decide if the symbol should be reported in the symbol table 228a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencerbool COFFSymbol::should_keep() const { 229a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // no section means its external, keep it 230a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (Section == NULL) 231a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer return true; 232a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 233a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // if it has relocations pointing at it, keep it 234a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (Relocations > 0) { 235a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer assert(Section->Number != -1 && "Sections with relocations must be real!"); 236a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer return true; 237a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer } 238a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 239a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // if the section its in is being droped, drop it 240a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (Section->Number == -1) 241a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer return false; 242a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 243a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // if it is the section symbol, keep it 244a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (Section->Symbol == this) 245a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer return true; 246a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 247a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // if its temporary, drop it 248a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (MCData && MCData->getSymbol().isTemporary()) 249a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer return false; 250a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 251a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // otherwise, keep it 252a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer return true; 253a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer} 254a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 255801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer//------------------------------------------------------------------------------ 256801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer// Section class implementation 257801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 25896f498bd9f140a98321c478f517877c4767b94faDmitri GribenkoCOFFSection::COFFSection(StringRef name) 259a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer : Name(name) 260a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer , MCData(NULL) 261a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer , Symbol(NULL) { 262801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer memset(&Header, 0, sizeof(Header)); 263801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 264801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 265801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencersize_t COFFSection::size() { 266801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer return COFF::SectionSize; 267801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 268801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 269801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer//------------------------------------------------------------------------------ 270801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer// StringTable class implementation 271801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 272801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer/// Write the length of the string table into Data. 273801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer/// The length of the string table includes uint32 length header. 274801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencervoid StringTable::update_length() { 275801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer write_uint32_le(&Data.front(), Data.size()); 276801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 277801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 278801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. SpencerStringTable::StringTable() { 279801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // The string table data begins with the length of the entire string table 280801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // including the length header. Allocate space for this header. 281801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Data.resize(4); 2820d64632c9e8a2632b8804bcc3fbc3523588862a7Michael J. Spencer update_length(); 283801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 284801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 285801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencersize_t StringTable::size() const { 286801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer return Data.size(); 287801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 288801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 28994c22716d60ff5edf6a98a3c67e0faa001be1142Sylvestre Ledru/// Add String to the table iff it is not already there. 290801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer/// @returns the index into the string table where the string is now located. 29196f498bd9f140a98321c478f517877c4767b94faDmitri Gribenkosize_t StringTable::insert(StringRef String) { 292801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer map::iterator i = Map.find(String); 293801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 294801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer if (i != Map.end()) 295801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer return i->second; 296801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 297801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer size_t Offset = Data.size(); 298801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 299801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Insert string data into string table. 300801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Data.insert(Data.end(), String.begin(), String.end()); 301801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Data.push_back('\0'); 302801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 303801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Put a reference to it in the map. 304801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Map[String] = Offset; 305801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 306801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Update the internal length field. 307801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer update_length(); 308801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 309801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer return Offset; 310801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 311801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 312801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer//------------------------------------------------------------------------------ 313801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer// WinCOFFObjectWriter class implementation 314801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 315df09270ae897e7fa64a7c162de163c32ee181a03Rafael EspindolaWinCOFFObjectWriter::WinCOFFObjectWriter(MCWinCOFFObjectTargetWriter *MOTW, 316df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola raw_ostream &OS) 31782c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer : MCObjectWriter(OS, true) 318df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola , TargetObjectWriter(MOTW) { 319801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer memset(&Header, 0, sizeof(Header)); 320da0bfcdaf95d95a66e306ef6d45f638939272d34Michael J. Spencer 321df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola Header.Machine = TargetObjectWriter->getMachine(); 322801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 323801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 324808ecfce6a312625bee5c0f4f9831a0d0ed01b16Benjamin KramerWinCOFFObjectWriter::~WinCOFFObjectWriter() { 325808ecfce6a312625bee5c0f4f9831a0d0ed01b16Benjamin Kramer for (symbols::iterator I = Symbols.begin(), E = Symbols.end(); I != E; ++I) 326808ecfce6a312625bee5c0f4f9831a0d0ed01b16Benjamin Kramer delete *I; 327808ecfce6a312625bee5c0f4f9831a0d0ed01b16Benjamin Kramer for (sections::iterator I = Sections.begin(), E = Sections.end(); I != E; ++I) 328808ecfce6a312625bee5c0f4f9831a0d0ed01b16Benjamin Kramer delete *I; 329808ecfce6a312625bee5c0f4f9831a0d0ed01b16Benjamin Kramer} 330808ecfce6a312625bee5c0f4f9831a0d0ed01b16Benjamin Kramer 3314cee2890a66974af506f2125243114cc14bd5556Michael J. SpencerCOFFSymbol *WinCOFFObjectWriter::createSymbol(StringRef Name) { 332801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer return createCOFFEntity<COFFSymbol>(Name, Symbols); 333801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 334801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 3354cee2890a66974af506f2125243114cc14bd5556Michael J. SpencerCOFFSymbol *WinCOFFObjectWriter::GetOrCreateCOFFSymbol(const MCSymbol * Symbol){ 3364cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer symbol_map::iterator i = SymbolMap.find(Symbol); 3374cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer if (i != SymbolMap.end()) 3384cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer return i->second; 3394cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer COFFSymbol *RetSymbol 3404cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer = createCOFFEntity<COFFSymbol>(Symbol->getName(), Symbols); 3414cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer SymbolMap[Symbol] = RetSymbol; 3424cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer return RetSymbol; 3434cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer} 3444cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer 34596f498bd9f140a98321c478f517877c4767b94faDmitri GribenkoCOFFSection *WinCOFFObjectWriter::createSection(StringRef Name) { 346801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer return createCOFFEntity<COFFSection>(Name, Sections); 347801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 348801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 349801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer/// A template used to lookup or create a symbol/section, and initialize it if 350801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer/// needed. 351801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencertemplate <typename object_t, typename list_t> 35296f498bd9f140a98321c478f517877c4767b94faDmitri Gribenkoobject_t *WinCOFFObjectWriter::createCOFFEntity(StringRef Name, 353801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer list_t &List) { 354a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer object_t *Object = new object_t(Name); 355801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 356801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer List.push_back(Object); 357801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 358801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer return Object; 359801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 360801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 361801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer/// This function takes a section data object from the assembler 362801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer/// and creates the associated COFF section staging object. 363801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencervoid WinCOFFObjectWriter::DefineSection(MCSectionData const &SectionData) { 364d47f4a9c982d264e46a6a2fe0f357288768bb5b9Michael J. Spencer assert(SectionData.getSection().getVariant() == MCSection::SV_COFF 365d47f4a9c982d264e46a6a2fe0f357288768bb5b9Michael J. Spencer && "Got non COFF section in the COFF backend!"); 366801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // FIXME: Not sure how to verify this (at least in a debug build). 367801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer MCSectionCOFF const &Sec = 368801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer static_cast<MCSectionCOFF const &>(SectionData.getSection()); 369801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 370801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer COFFSection *coff_section = createSection(Sec.getSectionName()); 371801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer COFFSymbol *coff_symbol = createSymbol(Sec.getSectionName()); 372801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 373a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer coff_section->Symbol = coff_symbol; 374a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer coff_symbol->Section = coff_section; 375801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_symbol->Data.StorageClass = COFF::IMAGE_SYM_CLASS_STATIC; 376801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 377801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // In this case the auxiliary symbol is a Section Definition. 378801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_symbol->Aux.resize(1); 379801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer memset(&coff_symbol->Aux[0], 0, sizeof(coff_symbol->Aux[0])); 380801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_symbol->Aux[0].AuxType = ATSectionDefinition; 381801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_symbol->Aux[0].Aux.SectionDefinition.Selection = Sec.getSelection(); 382801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 383801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_section->Header.Characteristics = Sec.getCharacteristics(); 384801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 385801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer uint32_t &Characteristics = coff_section->Header.Characteristics; 386801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer switch (SectionData.getAlignment()) { 387801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 1: Characteristics |= COFF::IMAGE_SCN_ALIGN_1BYTES; break; 388801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 2: Characteristics |= COFF::IMAGE_SCN_ALIGN_2BYTES; break; 389801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 4: Characteristics |= COFF::IMAGE_SCN_ALIGN_4BYTES; break; 390801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 8: Characteristics |= COFF::IMAGE_SCN_ALIGN_8BYTES; break; 391801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 16: Characteristics |= COFF::IMAGE_SCN_ALIGN_16BYTES; break; 392801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 32: Characteristics |= COFF::IMAGE_SCN_ALIGN_32BYTES; break; 393801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 64: Characteristics |= COFF::IMAGE_SCN_ALIGN_64BYTES; break; 394801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 128: Characteristics |= COFF::IMAGE_SCN_ALIGN_128BYTES; break; 395801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 256: Characteristics |= COFF::IMAGE_SCN_ALIGN_256BYTES; break; 396801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 512: Characteristics |= COFF::IMAGE_SCN_ALIGN_512BYTES; break; 397801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 1024: Characteristics |= COFF::IMAGE_SCN_ALIGN_1024BYTES; break; 398801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 2048: Characteristics |= COFF::IMAGE_SCN_ALIGN_2048BYTES; break; 399801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 4096: Characteristics |= COFF::IMAGE_SCN_ALIGN_4096BYTES; break; 400801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case 8192: Characteristics |= COFF::IMAGE_SCN_ALIGN_8192BYTES; break; 401801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer default: 402801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer llvm_unreachable("unsupported section alignment"); 403801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 404801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 405801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Bind internal COFF section to MC section. 406801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_section->MCData = &SectionData; 4074cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer SectionMap[&SectionData.getSection()] = coff_section; 408801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 409801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 410801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer/// This function takes a section data object from the assembler 411801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer/// and creates the associated COFF symbol staging object. 4124974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbournevoid WinCOFFObjectWriter::DefineSymbol(MCSymbolData const &SymbolData, 413a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer MCAssembler &Assembler) { 4144974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne MCSymbol const &Symbol = SymbolData.getSymbol(); 4150933134a304b47d3767aad202df9f0e09743da6dMichael J. Spencer COFFSymbol *coff_symbol = GetOrCreateCOFFSymbol(&Symbol); 4164974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne SymbolMap[&Symbol] = coff_symbol; 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 4210933134a304b47d3767aad202df9f0e09743da6dMichael J. Spencer if (Symbol.isVariable()) { 4224974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne const MCSymbolRefExpr *SymRef = 4234974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne dyn_cast<MCSymbolRefExpr>(Symbol.getVariableValue()); 424801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 4254974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne if (!SymRef) 4264974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne report_fatal_error("Weak externals may only alias symbols"); 427801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 4284974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne coff_symbol->Other = GetOrCreateCOFFSymbol(&SymRef->getSymbol()); 4294cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer } else { 4304cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer std::string WeakName = std::string(".weak.") 4310933134a304b47d3767aad202df9f0e09743da6dMichael J. Spencer + Symbol.getName().str() 4324cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer + ".default"; 4334cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer COFFSymbol *WeakDefault = createSymbol(WeakName); 4344cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer WeakDefault->Data.SectionNumber = COFF::IMAGE_SYM_ABSOLUTE; 4354cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer WeakDefault->Data.StorageClass = COFF::IMAGE_SYM_CLASS_EXTERNAL; 4364cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer WeakDefault->Data.Type = 0; 4374cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer WeakDefault->Data.Value = 0; 4384cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer coff_symbol->Other = WeakDefault; 4394cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer } 440801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 441801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Setup the Weak External auxiliary symbol. 442801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_symbol->Aux.resize(1); 443801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer memset(&coff_symbol->Aux[0], 0, sizeof(coff_symbol->Aux[0])); 444801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_symbol->Aux[0].AuxType = ATWeakExternal; 445801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_symbol->Aux[0].Aux.WeakExternal.TagIndex = 0; 446801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_symbol->Aux[0].Aux.WeakExternal.Characteristics = 4474cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer COFF::IMAGE_WEAK_EXTERN_SEARCH_LIBRARY; 4484cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer 4494974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne coff_symbol->MCData = &SymbolData; 4504974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne } else { 4514974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne const MCSymbolData &ResSymData = 4524974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne Assembler.getSymbolData(Symbol.AliasedSymbol()); 4534cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer 4544974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne coff_symbol->Data.Type = (ResSymData.getFlags() & 0x0000FFFF) >> 0; 4554974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne coff_symbol->Data.StorageClass = (ResSymData.getFlags() & 0x00FF0000) >> 16; 456801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 4574974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne // If no storage class was specified in the streamer, define it here. 4584974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne if (coff_symbol->Data.StorageClass == 0) { 4594974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne bool external = ResSymData.isExternal() || (ResSymData.Fragment == NULL); 460a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 4614974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne coff_symbol->Data.StorageClass = 4624974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne external ? COFF::IMAGE_SYM_CLASS_EXTERNAL : COFF::IMAGE_SYM_CLASS_STATIC; 4634974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne } 4644974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne 4654974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne if (ResSymData.Fragment != NULL) 4664974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne coff_symbol->Section = 4674974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne SectionMap[&ResSymData.Fragment->getParent()->getSection()]; 4684974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne 4694974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne coff_symbol->MCData = &ResSymData; 4704974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne } 471801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 472801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 473a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer/// making a section real involves assigned it a number and putting 474a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer/// name into the string table if needed 475a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencervoid WinCOFFObjectWriter::MakeSectionReal(COFFSection &S, size_t Number) { 476a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (S.Name.size() > COFF::NameSize) { 477a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer size_t StringTableEntry = Strings.insert(S.Name.c_str()); 478a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 479a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // FIXME: Why is this number 999999? This number is never mentioned in the 480a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // spec. I'm assuming this is due to the printed value needing to fit into 481a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // the S.Header.Name field. In which case why not 9999999 (7 9's instead of 482a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // 6)? The spec does not state if this entry should be null terminated in 483a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // this case, and thus this seems to be the best way to do it. I think I 484a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // just solved my own FIXME... 485a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (StringTableEntry > 999999) 486a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer report_fatal_error("COFF string table is greater than 999999 bytes."); 487a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 488a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer std::sprintf(S.Header.Name, "/%d", unsigned(StringTableEntry)); 489a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer } else 490a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer std::memcpy(S.Header.Name, S.Name.c_str(), S.Name.size()); 491a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 492a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer S.Number = Number; 493a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer S.Symbol->Data.SectionNumber = S.Number; 494a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer S.Symbol->Aux[0].Aux.SectionDefinition.Number = S.Number; 495a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer} 496a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 497a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencervoid WinCOFFObjectWriter::MakeSymbolReal(COFFSymbol &S, size_t Index) { 498a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (S.Name.size() > COFF::NameSize) { 499a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer size_t StringTableEntry = Strings.insert(S.Name.c_str()); 500a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 501a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer S.set_name_offset(StringTableEntry); 502a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer } else 503a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer std::memcpy(S.Data.Name, S.Name.c_str(), S.Name.size()); 504a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer S.Index = Index; 505a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer} 506a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 507a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencerbool WinCOFFObjectWriter::ExportSection(COFFSection const *S) { 508a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer return !S->MCData->getFragmentList().empty(); 509801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 510801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 511801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencerbool WinCOFFObjectWriter::ExportSymbol(MCSymbolData const &SymbolData, 512801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer MCAssembler &Asm) { 513801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // This doesn't seem to be right. Strings referred to from the .data section 514801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // need symbols so they can be linked to code in the .text section right? 515801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 516801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // return Asm.isSymbolLinkerVisible (&SymbolData); 517801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 518a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // For now, all non-variable symbols are exported, 519a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // the linker will sort the rest out for us. 5204cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer return SymbolData.isExternal() || !SymbolData.getSymbol().isVariable(); 521a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer} 522a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 523a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencerbool WinCOFFObjectWriter::IsPhysicalSection(COFFSection *S) { 524a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer return (S->Header.Characteristics 525a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA) == 0; 526801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 527801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 528801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer//------------------------------------------------------------------------------ 529801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer// entity writing methods 530801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 531801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencervoid WinCOFFObjectWriter::WriteFileHeader(const COFF::header &Header) { 532801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(Header.Machine); 533801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(Header.NumberOfSections); 534801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(Header.TimeDateStamp); 535801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(Header.PointerToSymbolTable); 536801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(Header.NumberOfSymbols); 537801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(Header.SizeOfOptionalHeader); 538801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(Header.Characteristics); 539801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 540801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 541801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencervoid WinCOFFObjectWriter::WriteSymbol(const COFFSymbol *S) { 542801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteBytes(StringRef(S->Data.Name, COFF::NameSize)); 543801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(S->Data.Value); 544801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(S->Data.SectionNumber); 545801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(S->Data.Type); 546801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Write8(S->Data.StorageClass); 547801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Write8(S->Data.NumberOfAuxSymbols); 548801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteAuxiliarySymbols(S->Aux); 549801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 550801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 551801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencervoid WinCOFFObjectWriter::WriteAuxiliarySymbols( 552801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer const COFFSymbol::AuxiliarySymbols &S) { 553801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for(COFFSymbol::AuxiliarySymbols::const_iterator i = S.begin(), e = S.end(); 554801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer i != e; ++i) { 555801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer switch(i->AuxType) { 556801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case ATFunctionDefinition: 557801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(i->Aux.FunctionDefinition.TagIndex); 558801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(i->Aux.FunctionDefinition.TotalSize); 559801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(i->Aux.FunctionDefinition.PointerToLinenumber); 560801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(i->Aux.FunctionDefinition.PointerToNextFunction); 561801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteZeros(sizeof(i->Aux.FunctionDefinition.unused)); 562801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer break; 563801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case ATbfAndefSymbol: 564801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteZeros(sizeof(i->Aux.bfAndefSymbol.unused1)); 565801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(i->Aux.bfAndefSymbol.Linenumber); 566801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteZeros(sizeof(i->Aux.bfAndefSymbol.unused2)); 567801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(i->Aux.bfAndefSymbol.PointerToNextFunction); 568801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteZeros(sizeof(i->Aux.bfAndefSymbol.unused3)); 569801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer break; 570801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case ATWeakExternal: 571801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(i->Aux.WeakExternal.TagIndex); 572801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(i->Aux.WeakExternal.Characteristics); 573801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteZeros(sizeof(i->Aux.WeakExternal.unused)); 574801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer break; 575801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case ATFile: 576801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteBytes(StringRef(reinterpret_cast<const char *>(i->Aux.File.FileName), 577801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer sizeof(i->Aux.File.FileName))); 578801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer break; 579801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer case ATSectionDefinition: 580801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(i->Aux.SectionDefinition.Length); 581801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(i->Aux.SectionDefinition.NumberOfRelocations); 582801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(i->Aux.SectionDefinition.NumberOfLinenumbers); 583801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(i->Aux.SectionDefinition.CheckSum); 584801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(i->Aux.SectionDefinition.Number); 585801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Write8(i->Aux.SectionDefinition.Selection); 586801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteZeros(sizeof(i->Aux.SectionDefinition.unused)); 587801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer break; 588801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 589801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 590801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 591801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 592801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencervoid WinCOFFObjectWriter::WriteSectionHeader(const COFF::section &S) { 593801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteBytes(StringRef(S.Name, COFF::NameSize)); 594801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 595801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(S.VirtualSize); 596801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(S.VirtualAddress); 597801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(S.SizeOfRawData); 598801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(S.PointerToRawData); 599801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(S.PointerToRelocations); 600801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(S.PointerToLineNumbers); 601801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(S.NumberOfRelocations); 602801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(S.NumberOfLineNumbers); 603801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(S.Characteristics); 604801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer} 605801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 606801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencervoid WinCOFFObjectWriter::WriteRelocation(const COFF::relocation &R) { 607801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(R.VirtualAddress); 608801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE32(R.SymbolTableIndex); 609801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteLE16(R.Type); 610b162290e39afd49d4c7d342333b331bc96232720Chris Lattner} 611b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 612b162290e39afd49d4c7d342333b331bc96232720Chris Lattner//////////////////////////////////////////////////////////////////////////////// 613b162290e39afd49d4c7d342333b331bc96232720Chris Lattner// MCObjectWriter interface implementations 614b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 61585f2ecc697a8ca6c8cf08093054cbbb9d2060ccfRafael Espindolavoid WinCOFFObjectWriter::ExecutePostLayoutBinding(MCAssembler &Asm, 61685f2ecc697a8ca6c8cf08093054cbbb9d2060ccfRafael Espindola const MCAsmLayout &Layout) { 617801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // "Define" each section & symbol. This creates section & symbol 618a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // entries in the staging area. 619801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 620801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for (MCAssembler::const_iterator i = Asm.begin(), e = Asm.end(); i != e; i++) 621801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer DefineSection(*i); 622801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 623801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for (MCAssembler::const_symbol_iterator i = Asm.symbol_begin(), 624801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer e = Asm.symbol_end(); i != e; i++) { 6250933134a304b47d3767aad202df9f0e09743da6dMichael J. Spencer if (ExportSymbol(*i, Asm)) { 6264974b972e7dd94fad74ada4df32a12aba09c4de0Peter Collingbourne DefineSymbol(*i, Asm); 6270933134a304b47d3767aad202df9f0e09743da6dMichael J. Spencer } 628801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 629b162290e39afd49d4c7d342333b331bc96232720Chris Lattner} 630b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 631b162290e39afd49d4c7d342333b331bc96232720Chris Lattnervoid WinCOFFObjectWriter::RecordRelocation(const MCAssembler &Asm, 632b162290e39afd49d4c7d342333b331bc96232720Chris Lattner const MCAsmLayout &Layout, 633b162290e39afd49d4c7d342333b331bc96232720Chris Lattner const MCFragment *Fragment, 634b162290e39afd49d4c7d342333b331bc96232720Chris Lattner const MCFixup &Fixup, 635b162290e39afd49d4c7d342333b331bc96232720Chris Lattner MCValue Target, 636b162290e39afd49d4c7d342333b331bc96232720Chris Lattner uint64_t &FixedValue) { 637801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer assert(Target.getSymA() != NULL && "Relocation must reference a symbol!"); 63882c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer 63982c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer const MCSymbol *A = &Target.getSymA()->getSymbol(); 64082c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer MCSymbolData &A_SD = Asm.getSymbolData(*A); 641801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 642801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer MCSectionData const *SectionData = Fragment->getParent(); 643801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 64482c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer // Mark this symbol as requiring an entry in the symbol table. 6454cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer assert(SectionMap.find(&SectionData->getSection()) != SectionMap.end() && 646801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer "Section must already have been defined in ExecutePostLayoutBinding!"); 6474cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer assert(SymbolMap.find(&A_SD.getSymbol()) != SymbolMap.end() && 648801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer "Symbol must already have been defined in ExecutePostLayoutBinding!"); 649801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 6504cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer COFFSection *coff_section = SectionMap[&SectionData->getSection()]; 6514cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer COFFSymbol *coff_symbol = SymbolMap[&A_SD.getSymbol()]; 6523660a847f1820d73847539f3959dc069396f8e44Rafael Espindola const MCSymbolRefExpr *SymA = Target.getSymA(); 6533660a847f1820d73847539f3959dc069396f8e44Rafael Espindola const MCSymbolRefExpr *SymB = Target.getSymB(); 6543660a847f1820d73847539f3959dc069396f8e44Rafael Espindola const bool CrossSection = SymB && 6553660a847f1820d73847539f3959dc069396f8e44Rafael Espindola &SymA->getSymbol().getSection() != &SymB->getSymbol().getSection(); 65682c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer 65782c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer if (Target.getSymB()) { 65882c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer const MCSymbol *B = &Target.getSymB()->getSymbol(); 65982c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer MCSymbolData &B_SD = Asm.getSymbolData(*B); 660801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 6611ac7fe0f4dae8a9266fa6ff31ea4939ec64a3e5eRafael Espindola // Offset of the symbol in the section 6621ac7fe0f4dae8a9266fa6ff31ea4939ec64a3e5eRafael Espindola int64_t a = Layout.getSymbolOffset(&B_SD); 66382c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer 6641ac7fe0f4dae8a9266fa6ff31ea4939ec64a3e5eRafael Espindola // Ofeset of the relocation in the section 6651ac7fe0f4dae8a9266fa6ff31ea4939ec64a3e5eRafael Espindola int64_t b = Layout.getFragmentOffset(Fragment) + Fixup.getOffset(); 6661ac7fe0f4dae8a9266fa6ff31ea4939ec64a3e5eRafael Espindola 6671ac7fe0f4dae8a9266fa6ff31ea4939ec64a3e5eRafael Espindola FixedValue = b - a; 66882c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer // In the case where we have SymbA and SymB, we just need to store the delta 66982c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer // between the two symbols. Update FixedValue to account for the delta, and 67082c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer // skip recording the relocation. 6713660a847f1820d73847539f3959dc069396f8e44Rafael Espindola if (!CrossSection) 6723660a847f1820d73847539f3959dc069396f8e44Rafael Espindola return; 67382c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer } else { 67482c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer FixedValue = Target.getConstant(); 67582c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer } 676801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 677801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer COFFRelocation Reloc; 678801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 679425f634917542d7f09c189e2eb130752c6a12d2cDaniel Dunbar Reloc.Data.SymbolTableIndex = 0; 680801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Reloc.Data.VirtualAddress = Layout.getFragmentOffset(Fragment); 681a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 682ea1104a4c376634ed8eb693f6c71e0ac51074949Michael J. Spencer // Turn relocations for temporary symbols into section relocations. 6833660a847f1820d73847539f3959dc069396f8e44Rafael Espindola if (coff_symbol->MCData->getSymbol().isTemporary() || CrossSection) { 684a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer Reloc.Symb = coff_symbol->Section->Symbol; 685eb6e77f8cccd14cdba995ff8231f2c9faea9bfccMichael J. Spencer FixedValue += Layout.getFragmentOffset(coff_symbol->MCData->Fragment) 686eb6e77f8cccd14cdba995ff8231f2c9faea9bfccMichael J. Spencer + coff_symbol->MCData->getOffset(); 687a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer } else 688a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer Reloc.Symb = coff_symbol; 689a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 690a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer ++Reloc.Symb->Relocations; 691801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 692801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Reloc.Data.VirtualAddress += Fixup.getOffset(); 69318d49acdab79d6f0966b47182b6c3a2ba3d9f80fNico Rieck Reloc.Data.Type = TargetObjectWriter->getRelocType(Target, Fixup, 69418d49acdab79d6f0966b47182b6c3a2ba3d9f80fNico Rieck CrossSection); 695b156c5d3765637393eda28b04b7fc1e5c55675ebRafael Espindola 696b156c5d3765637393eda28b04b7fc1e5c55675ebRafael Espindola // FIXME: Can anyone explain what this does other than adjust for the size 697b156c5d3765637393eda28b04b7fc1e5c55675ebRafael Espindola // of the offset? 698b156c5d3765637393eda28b04b7fc1e5c55675ebRafael Espindola if (Reloc.Data.Type == COFF::IMAGE_REL_AMD64_REL32 || 699b156c5d3765637393eda28b04b7fc1e5c55675ebRafael Espindola Reloc.Data.Type == COFF::IMAGE_REL_I386_REL32) 70082c84fdd23669d23c02a07498c83b83702979829Michael J. Spencer FixedValue += 4; 701801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 702801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer coff_section->Relocations.push_back(Reloc); 703b162290e39afd49d4c7d342333b331bc96232720Chris Lattner} 704b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 7058f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindolavoid WinCOFFObjectWriter::WriteObject(MCAssembler &Asm, 706b162290e39afd49d4c7d342333b331bc96232720Chris Lattner const MCAsmLayout &Layout) { 707801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Assign symbol and section indexes and offsets. 708a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer Header.NumberOfSections = 0; 709a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 710a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer for (sections::iterator i = Sections.begin(), 711a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer e = Sections.end(); i != e; i++) { 71285f2ecc697a8ca6c8cf08093054cbbb9d2060ccfRafael Espindola if (Layout.getSectionAddressSize((*i)->MCData) > 0) { 713a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer MakeSectionReal(**i, ++Header.NumberOfSections); 714a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer } else { 715a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer (*i)->Number = -1; 716a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer } 717a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer } 718801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 719801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Header.NumberOfSymbols = 0; 720801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 721801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for (symbols::iterator i = Symbols.begin(), e = Symbols.end(); i != e; i++) { 722801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer COFFSymbol *coff_symbol = *i; 723801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer MCSymbolData const *SymbolData = coff_symbol->MCData; 724801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 725801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Update section number & offset for symbols that have them. 726801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer if ((SymbolData != NULL) && (SymbolData->Fragment != NULL)) { 727a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer assert(coff_symbol->Section != NULL); 728801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 729a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer coff_symbol->Data.SectionNumber = coff_symbol->Section->Number; 730237f8fe5df628065874b8590b364d04dfc2686fdMichael J. Spencer coff_symbol->Data.Value = Layout.getFragmentOffset(SymbolData->Fragment) 731237f8fe5df628065874b8590b364d04dfc2686fdMichael J. Spencer + SymbolData->Offset; 732801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 733801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 734a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (coff_symbol->should_keep()) { 735a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer MakeSymbolReal(*coff_symbol, Header.NumberOfSymbols++); 736a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 737a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer // Update auxiliary symbol info. 738a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer coff_symbol->Data.NumberOfAuxSymbols = coff_symbol->Aux.size(); 739a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer Header.NumberOfSymbols += coff_symbol->Data.NumberOfAuxSymbols; 740a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer } else 741a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer coff_symbol->Index = -1; 742801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 743801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 744801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Fixup weak external references. 745801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for (symbols::iterator i = Symbols.begin(), e = Symbols.end(); i != e; i++) { 746a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer COFFSymbol *coff_symbol = *i; 747a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (coff_symbol->Other != NULL) { 748a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer assert(coff_symbol->Index != -1); 749a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer assert(coff_symbol->Aux.size() == 1 && 750801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer "Symbol must contain one aux symbol!"); 751a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer assert(coff_symbol->Aux[0].AuxType == ATWeakExternal && 752801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer "Symbol's aux symbol must be a Weak External!"); 753a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer coff_symbol->Aux[0].Aux.WeakExternal.TagIndex = coff_symbol->Other->Index; 754801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 755801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 756801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 757801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Assign file offsets to COFF object file structures. 758801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 759801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer unsigned offset = 0; 760801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 761801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer offset += COFF::HeaderSize; 762a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer offset += COFF::SectionSize * Header.NumberOfSections; 763801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 764801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for (MCAssembler::const_iterator i = Asm.begin(), 765801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer e = Asm.end(); 766801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer i != e; i++) { 7674cee2890a66974af506f2125243114cc14bd5556Michael J. Spencer COFFSection *Sec = SectionMap[&i->getSection()]; 768801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 769a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (Sec->Number == -1) 770a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer continue; 771a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 77228ca86aa19fe2a5493573164ef0c2c54542ed9daMichael J. Spencer Sec->Header.SizeOfRawData = Layout.getSectionAddressSize(i); 773801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 774a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if (IsPhysicalSection(Sec)) { 775801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Sec->Header.PointerToRawData = offset; 776801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 777801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer offset += Sec->Header.SizeOfRawData; 778801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 779801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 780801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer if (Sec->Relocations.size() > 0) { 781d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer bool RelocationsOverflow = Sec->Relocations.size() >= 0xffff; 782d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer 783d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer if (RelocationsOverflow) { 784d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer // Signal overflow by setting NumberOfSections to max value. Actual 785d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer // size is found in reloc #0. Microsoft tools understand this. 786d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer Sec->Header.NumberOfRelocations = 0xffff; 787d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer } else { 788d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer Sec->Header.NumberOfRelocations = Sec->Relocations.size(); 789d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer } 790801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Sec->Header.PointerToRelocations = offset; 791801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 792d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer if (RelocationsOverflow) { 793d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer // Reloc #0 will contain actual count, so make room for it. 794d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer offset += COFF::RelocationSize; 795d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer } 796d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer 797801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer offset += COFF::RelocationSize * Sec->Relocations.size(); 798801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 799801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for (relocations::iterator cr = Sec->Relocations.begin(), 800801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer er = Sec->Relocations.end(); 801a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer cr != er; ++cr) { 802a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer assert((*cr).Symb->Index != -1); 803801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer (*cr).Data.SymbolTableIndex = (*cr).Symb->Index; 804801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 805801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 806801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 807a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer assert(Sec->Symbol->Aux.size() == 1 808a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer && "Section's symbol must have one aux!"); 809a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer AuxSymbol &Aux = Sec->Symbol->Aux[0]; 810801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer assert(Aux.AuxType == ATSectionDefinition && 811801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer "Section's symbol's aux symbol must be a Section Definition!"); 812801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Aux.Aux.SectionDefinition.Length = Sec->Header.SizeOfRawData; 813801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Aux.Aux.SectionDefinition.NumberOfRelocations = 814801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Sec->Header.NumberOfRelocations; 815801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Aux.Aux.SectionDefinition.NumberOfLinenumbers = 816801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Sec->Header.NumberOfLineNumbers; 817801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 818801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 819801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer Header.PointerToSymbolTable = offset; 820801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 821ab3de49c48bd3282421ce24323fb6b868a3da6ccMichael J. Spencer Header.TimeDateStamp = sys::TimeValue::now().toEpochTime(); 822ab3de49c48bd3282421ce24323fb6b868a3da6ccMichael J. Spencer 823801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer // Write it all to disk... 824801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteFileHeader(Header); 825801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 826801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer { 827801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer sections::iterator i, ie; 828801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer MCAssembler::const_iterator j, je; 829801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 830801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for (i = Sections.begin(), ie = Sections.end(); i != ie; i++) 831d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer if ((*i)->Number != -1) { 832d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer if ((*i)->Relocations.size() >= 0xffff) { 833d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer (*i)->Header.Characteristics |= COFF::IMAGE_SCN_LNK_NRELOC_OVFL; 834d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer } 835a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer WriteSectionHeader((*i)->Header); 836d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer } 837801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 838801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for (i = Sections.begin(), ie = Sections.end(), 839801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer j = Asm.begin(), je = Asm.end(); 840a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer (i != ie) && (j != je); ++i, ++j) { 841a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 842a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if ((*i)->Number == -1) 843a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer continue; 844a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer 845801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer if ((*i)->Header.PointerToRawData != 0) { 846801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer assert(OS.tell() == (*i)->Header.PointerToRawData && 847801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer "Section::PointerToRawData is insane!"); 848801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 849f77d5b14af6b92403b93f7ed249f9023e99028ccJim Grosbach Asm.writeSectionData(j, Layout); 850801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 851801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 852801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer if ((*i)->Relocations.size() > 0) { 853801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer assert(OS.tell() == (*i)->Header.PointerToRelocations && 854801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer "Section::PointerToRelocations is insane!"); 855801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 856d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer if ((*i)->Relocations.size() >= 0xffff) { 857d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer // In case of overflow, write actual relocation count as first 858d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer // relocation. Including the synthetic reloc itself (+ 1). 859d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer COFF::relocation r; 860d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer r.VirtualAddress = (*i)->Relocations.size() + 1; 861d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer r.SymbolTableIndex = 0; 862d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer r.Type = 0; 863d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer WriteRelocation(r); 864d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer } 865d03a29b69d7285ed2ca523d70a45174e33716727Michael J. Spencer 866801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for (relocations::const_iterator k = (*i)->Relocations.begin(), 867801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer ke = (*i)->Relocations.end(); 868801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer k != ke; k++) { 869801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer WriteRelocation(k->Data); 870801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 871801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } else 872801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer assert((*i)->Header.PointerToRelocations == 0 && 873801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer "Section::PointerToRelocations is insane!"); 874801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 875801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer } 876801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 877801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer assert(OS.tell() == Header.PointerToSymbolTable && 878801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer "Header::PointerToSymbolTable is insane!"); 879801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 880801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer for (symbols::iterator i = Symbols.begin(), e = Symbols.end(); i != e; i++) 881a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer if ((*i)->Index != -1) 882a72d87899bc1bfdb17744aae2545a21b3630d3c1Michael J. Spencer WriteSymbol(*i); 883801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer 884801a3591161789e9716b0ec519f0f950b2d0c2acMichael J. Spencer OS.write((char const *)&Strings.Data.front(), Strings.Data.size()); 885b162290e39afd49d4c7d342333b331bc96232720Chris Lattner} 886b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 887df09270ae897e7fa64a7c162de163c32ee181a03Rafael EspindolaMCWinCOFFObjectTargetWriter::MCWinCOFFObjectTargetWriter(unsigned Machine_) : 888df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola Machine(Machine_) { 889df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola} 890df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola 891b162290e39afd49d4c7d342333b331bc96232720Chris Lattner//------------------------------------------------------------------------------ 892b162290e39afd49d4c7d342333b331bc96232720Chris Lattner// WinCOFFObjectWriter factory function 893b162290e39afd49d4c7d342333b331bc96232720Chris Lattner 894b162290e39afd49d4c7d342333b331bc96232720Chris Lattnernamespace llvm { 895df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola MCObjectWriter *createWinCOFFObjectWriter(MCWinCOFFObjectTargetWriter *MOTW, 896df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola raw_ostream &OS) { 897df09270ae897e7fa64a7c162de163c32ee181a03Rafael Espindola return new WinCOFFObjectWriter(MOTW, OS); 898b162290e39afd49d4c7d342333b331bc96232720Chris Lattner } 899933304ef0c3ec18c23d0b385c2117a6eae790430Michael J. Spencer} 900