ELFObjectWriter.cpp revision f3eb3bba1614a7935b44fc963a805088d71267f3
13565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming//===- lib/MC/ELFObjectWriter.cpp - ELF File Writer -------------------===// 23565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming// 33565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming// The LLVM Compiler Infrastructure 43565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming// 53565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming// This file is distributed under the University of Illinois Open Source 63565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming// License. See LICENSE.TXT for details. 73565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming// 83565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming//===----------------------------------------------------------------------===// 93565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming// 103565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming// This file implements ELF object file writer information. 113565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming// 123565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming//===----------------------------------------------------------------------===// 133565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1431f3578b00a2ea85fb730b690f0478529103c748Rafael Espindola#include "llvm/ADT/OwningPtr.h" 158f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola#include "llvm/ADT/SmallPtrSet.h" 163565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/ADT/STLExtras.h" 173565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/ADT/StringMap.h" 183565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/ADT/Twine.h" 193565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/MC/MCAssembler.h" 203565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/MC/MCAsmLayout.h" 213565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/MC/MCContext.h" 223565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/MC/MCELFSymbolFlags.h" 233565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/MC/MCExpr.h" 24285b3e5b61af15f11e59a7700375aefa2a326bd8Rafael Espindola#include "llvm/MC/MCELFObjectWriter.h" 253565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/MC/MCObjectWriter.h" 263565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/MC/MCSectionELF.h" 273565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/MC/MCSymbol.h" 283565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/MC/MCValue.h" 293565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/Support/Debug.h" 303565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/Support/ErrorHandling.h" 313565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/Support/ELF.h" 323565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/Target/TargetAsmBackend.h" 333565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 343565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "../Target/X86/X86FixupKinds.h" 354a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim#include "../Target/ARM/ARMFixupKinds.h" 363565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 373565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include <vector> 383565a06ebf44a193a8b333cbeff2ee154298d450Matt Flemingusing namespace llvm; 393565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 40ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindolastatic unsigned GetType(const MCSymbolData &SD) { 41ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola uint32_t Type = (SD.getFlags() & (0xf << ELF_STT_Shift)) >> ELF_STT_Shift; 42ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola assert(Type == ELF::STT_NOTYPE || Type == ELF::STT_OBJECT || 43ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola Type == ELF::STT_FUNC || Type == ELF::STT_SECTION || 44ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola Type == ELF::STT_FILE || Type == ELF::STT_COMMON || 45ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola Type == ELF::STT_TLS); 46ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola return Type; 47ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola} 48ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola 49e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindolastatic unsigned GetBinding(const MCSymbolData &SD) { 50e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola uint32_t Binding = (SD.getFlags() & (0xf << ELF_STB_Shift)) >> ELF_STB_Shift; 51e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola assert(Binding == ELF::STB_LOCAL || Binding == ELF::STB_GLOBAL || 52e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola Binding == ELF::STB_WEAK); 53e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola return Binding; 54e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola} 55e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola 56e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindolastatic void SetBinding(MCSymbolData &SD, unsigned Binding) { 57e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola assert(Binding == ELF::STB_LOCAL || Binding == ELF::STB_GLOBAL || 58e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola Binding == ELF::STB_WEAK); 59e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola uint32_t OtherFlags = SD.getFlags() & ~(0xf << ELF_STB_Shift); 60e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola SD.setFlags(OtherFlags | (Binding << ELF_STB_Shift)); 61e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola} 62e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola 63152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindolastatic unsigned GetVisibility(MCSymbolData &SD) { 64152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola unsigned Visibility = 65152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola (SD.getFlags() & (0xf << ELF_STV_Shift)) >> ELF_STV_Shift; 66152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola assert(Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_INTERNAL || 67152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola Visibility == ELF::STV_HIDDEN || Visibility == ELF::STV_PROTECTED); 68152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola return Visibility; 69152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola} 70152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola 714b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 72a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindolastatic bool RelocNeedsGOT(MCSymbolRefExpr::VariantKind Variant) { 73a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindola switch (Variant) { 745c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola default: 755c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola return false; 76a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindola case MCSymbolRefExpr::VK_GOT: 77a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindola case MCSymbolRefExpr::VK_PLT: 78a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindola case MCSymbolRefExpr::VK_GOTPCREL: 79a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindola case MCSymbolRefExpr::VK_TPOFF: 80a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindola case MCSymbolRefExpr::VK_TLSGD: 81a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindola case MCSymbolRefExpr::VK_GOTTPOFF: 82a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindola case MCSymbolRefExpr::VK_INDNTPOFF: 83a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindola case MCSymbolRefExpr::VK_NTPOFF: 84a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindola case MCSymbolRefExpr::VK_GOTNTPOFF: 85a264f72d3fb9dec1427480fcf17ef3c746ea723aRafael Espindola case MCSymbolRefExpr::VK_TLSLDM: 860cf15d61b7e3bf53f5a99f58ada37b93bc039559Rafael Espindola case MCSymbolRefExpr::VK_DTPOFF: 87b4d1721eff7b43577e5f2e53f885973fb6c43683Rafael Espindola case MCSymbolRefExpr::VK_TLSLD: 885c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola return true; 895c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola } 905c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola} 915c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola 92127a6a47bd779f0e1e5274422537cdaac3ab2ca7Rafael Espindolastatic bool isFixupKindPCRel(const MCAssembler &Asm, unsigned Kind) { 93127a6a47bd779f0e1e5274422537cdaac3ab2ca7Rafael Espindola const MCFixupKindInfo &FKI = 94127a6a47bd779f0e1e5274422537cdaac3ab2ca7Rafael Espindola Asm.getBackend().getFixupKindInfo((MCFixupKind) Kind); 95127a6a47bd779f0e1e5274422537cdaac3ab2ca7Rafael Espindola 96127a6a47bd779f0e1e5274422537cdaac3ab2ca7Rafael Espindola return FKI.Flags & MCFixupKindInfo::FKF_IsPCRel; 97127a6a47bd779f0e1e5274422537cdaac3ab2ca7Rafael Espindola} 98127a6a47bd779f0e1e5274422537cdaac3ab2ca7Rafael Espindola 993565a06ebf44a193a8b333cbeff2ee154298d450Matt Flemingnamespace { 100115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar class ELFObjectWriter : public MCObjectWriter { 101d3443e99e43945fdb0742177da06a32fa225740dJason W Kim protected: 102b188a3789e2fc64ec7088a220c4c428c41d86faaChris Lattner /*static bool isFixupKindX86RIPRel(unsigned Kind) { 1033565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming return Kind == X86::reloc_riprel_4byte || 1043565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Kind == X86::reloc_riprel_4byte_movq_load; 105b188a3789e2fc64ec7088a220c4c428c41d86faaChris Lattner }*/ 1063565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1073565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1083565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// ELFSymbolData - Helper struct for containing some precomputed information 1093565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// on symbols. 1103565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming struct ELFSymbolData { 1113565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCSymbolData *SymbolData; 1123565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint64_t StringIndex; 1133565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint32_t SectionIndex; 1143565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1153565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Support lexicographic sorting. 1163565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming bool operator<(const ELFSymbolData &RHS) const { 117ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola if (GetType(*SymbolData) == ELF::STT_FILE) 118ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola return true; 119ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola if (GetType(*RHS.SymbolData) == ELF::STT_FILE) 120ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola return false; 12136c6dc22bcaed92f03f7019a0d1cd47ea69e12daBenjamin Kramer return SymbolData->getSymbol().getName() < 12236c6dc22bcaed92f03f7019a0d1cd47ea69e12daBenjamin Kramer RHS.SymbolData->getSymbol().getName(); 1233565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 1243565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming }; 1253565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1263565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// @name Relocation Data 1273565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// @{ 1283565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1293565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming struct ELFRelocationEntry { 1303565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Make these big enough for both 32-bit and 64-bit 1313565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint64_t r_offset; 1328f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola int Index; 1338f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola unsigned Type; 1348f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola const MCSymbol *Symbol; 1353565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint64_t r_addend; 136858e7506e1fabe563eb4222c80ad0fad01641becJason W Kim 1374a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim ELFRelocationEntry() 1384a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim : r_offset(0), Index(0), Type(0), Symbol(0), r_addend(0) {} 1394a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim 14010907426893019c6b7e59c886e41815d4fe50b19Jason W Kim ELFRelocationEntry(uint64_t RelocOffset, int Idx, 14110907426893019c6b7e59c886e41815d4fe50b19Jason W Kim unsigned RelType, const MCSymbol *Sym, 1424a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim uint64_t Addend) 14310907426893019c6b7e59c886e41815d4fe50b19Jason W Kim : r_offset(RelocOffset), Index(Idx), Type(RelType), 14410907426893019c6b7e59c886e41815d4fe50b19Jason W Kim Symbol(Sym), r_addend(Addend) {} 1453565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1463565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Support lexicographic sorting. 1473565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming bool operator<(const ELFRelocationEntry &RE) const { 1483565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming return RE.r_offset < r_offset; 1493565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 1503565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming }; 1513565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 15231f3578b00a2ea85fb730b690f0478529103c748Rafael Espindola /// The target specific ELF writer instance. 15331f3578b00a2ea85fb730b690f0478529103c748Rafael Espindola llvm::OwningPtr<MCELFObjectTargetWriter> TargetObjectWriter; 15431f3578b00a2ea85fb730b690f0478529103c748Rafael Espindola 1558f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola SmallPtrSet<const MCSymbol *, 16> UsedInReloc; 156484291c27319668ad99cb87def000254357736fbRafael Espindola SmallPtrSet<const MCSymbol *, 16> WeakrefUsedInReloc; 15788182132470527e27231f09b25a885893e528c66Rafael Espindola DenseMap<const MCSymbol *, const MCSymbol *> Renames; 1588f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola 1593565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming llvm::DenseMap<const MCSectionData*, 1603565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming std::vector<ELFRelocationEntry> > Relocations; 1613565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming DenseMap<const MCSection*, uint64_t> SectionStringTableIndex; 1623565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1633565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// @} 1643565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// @name Symbol Table Data 1653565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// @{ 1663565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1673565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming SmallString<256> StringTable; 1683565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming std::vector<ELFSymbolData> LocalSymbolData; 1693565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming std::vector<ELFSymbolData> ExternalSymbolData; 1703565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming std::vector<ELFSymbolData> UndefinedSymbolData; 1713565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1723565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// @} 1733565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1745c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola bool NeedsGOT; 1755c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola 1767be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola bool NeedsSymtabShndx; 1777be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola 1783565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // This holds the symbol table index of the last local symbol. 1793565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming unsigned LastLocalSymbolIndex; 1803565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // This holds the .strtab section index. 1813565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming unsigned StringTableIndex; 1827be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola // This holds the .symtab section index. 1837be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola unsigned SymbolTableIndex; 1843565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1853565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming unsigned ShstrtabIndex; 1863565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1871f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola 1881f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola const MCSymbol *SymbolToReloc(const MCAssembler &Asm, 1891f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola const MCValue &Target, 1901f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola const MCFragment &F) const; 1911f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola 192bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola bool is64Bit() const { return TargetObjectWriter->is64Bit(); } 193bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola bool hasRelocationAddend() const { 194bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola return TargetObjectWriter->hasRelocationAddend(); 195bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola } 196bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola 1973565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming public: 19831f3578b00a2ea85fb730b690f0478529103c748Rafael Espindola ELFObjectWriter(MCELFObjectTargetWriter *MOTW, 199bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola raw_ostream &_OS, bool IsLittleEndian) 200115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar : MCObjectWriter(_OS, IsLittleEndian), 20131f3578b00a2ea85fb730b690f0478529103c748Rafael Espindola TargetObjectWriter(MOTW), 202bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola NeedsGOT(false), NeedsSymtabShndx(false){ 2033565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 204d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 205d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual ~ELFObjectWriter(); 206d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 2073565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming void WriteWord(uint64_t W) { 208bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola if (is64Bit()) 209115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar Write64(W); 210b188a3789e2fc64ec7088a220c4c428c41d86faaChris Lattner else 211115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar Write32(W); 2123565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 2133565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 2143565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming void StringLE16(char *buf, uint16_t Value) { 2153565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming buf[0] = char(Value >> 0); 2163565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming buf[1] = char(Value >> 8); 2173565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 2183565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 2193565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming void StringLE32(char *buf, uint32_t Value) { 22036c6dc22bcaed92f03f7019a0d1cd47ea69e12daBenjamin Kramer StringLE16(buf, uint16_t(Value >> 0)); 221c522f6e70b02d161e4bf37023edb20643ee34acfBenjamin Kramer StringLE16(buf + 2, uint16_t(Value >> 16)); 2223565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 2233565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 2243565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming void StringLE64(char *buf, uint64_t Value) { 22536c6dc22bcaed92f03f7019a0d1cd47ea69e12daBenjamin Kramer StringLE32(buf, uint32_t(Value >> 0)); 226c522f6e70b02d161e4bf37023edb20643ee34acfBenjamin Kramer StringLE32(buf + 4, uint32_t(Value >> 32)); 2273565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 2283565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 2293565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming void StringBE16(char *buf ,uint16_t Value) { 2303565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming buf[0] = char(Value >> 8); 2313565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming buf[1] = char(Value >> 0); 2323565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 2333565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 2343565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming void StringBE32(char *buf, uint32_t Value) { 23536c6dc22bcaed92f03f7019a0d1cd47ea69e12daBenjamin Kramer StringBE16(buf, uint16_t(Value >> 16)); 236c522f6e70b02d161e4bf37023edb20643ee34acfBenjamin Kramer StringBE16(buf + 2, uint16_t(Value >> 0)); 2373565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 2383565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 2393565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming void StringBE64(char *buf, uint64_t Value) { 24036c6dc22bcaed92f03f7019a0d1cd47ea69e12daBenjamin Kramer StringBE32(buf, uint32_t(Value >> 32)); 241c522f6e70b02d161e4bf37023edb20643ee34acfBenjamin Kramer StringBE32(buf + 4, uint32_t(Value >> 0)); 2423565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 2433565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 244af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola void String8(MCDataFragment &F, uint8_t Value) { 245af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola char buf[1]; 246af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola buf[0] = Value; 247af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola F.getContents() += StringRef(buf, 1); 248af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola } 249af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola 250af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola void String16(MCDataFragment &F, uint16_t Value) { 251af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola char buf[2]; 252115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar if (isLittleEndian()) 253f8020a3978b9a56074a3a5f9821c63165e37bff7Eli Friedman StringLE16(buf, Value); 2543565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming else 255f8020a3978b9a56074a3a5f9821c63165e37bff7Eli Friedman StringBE16(buf, Value); 256af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola F.getContents() += StringRef(buf, 2); 2573565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 2583565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 259af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola void String32(MCDataFragment &F, uint32_t Value) { 260af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola char buf[4]; 261115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar if (isLittleEndian()) 262f8020a3978b9a56074a3a5f9821c63165e37bff7Eli Friedman StringLE32(buf, Value); 2633565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming else 264f8020a3978b9a56074a3a5f9821c63165e37bff7Eli Friedman StringBE32(buf, Value); 265af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola F.getContents() += StringRef(buf, 4); 2663565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 2673565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 268af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola void String64(MCDataFragment &F, uint64_t Value) { 269af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola char buf[8]; 270115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar if (isLittleEndian()) 271f8020a3978b9a56074a3a5f9821c63165e37bff7Eli Friedman StringLE64(buf, Value); 2723565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming else 273f8020a3978b9a56074a3a5f9821c63165e37bff7Eli Friedman StringBE64(buf, Value); 274af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola F.getContents() += StringRef(buf, 8); 2753565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 2763565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 277d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void WriteHeader(uint64_t SectionDataSize, unsigned NumberOfSections); 2783565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 279d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void WriteSymbolEntry(MCDataFragment *SymtabF, MCDataFragment *ShndxF, 2807be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola uint64_t name, uint8_t info, 2813565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint64_t value, uint64_t size, 2827be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola uint8_t other, uint32_t shndx, 2837be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola bool Reserved); 2843565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 285d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void WriteSymbol(MCDataFragment *SymtabF, MCDataFragment *ShndxF, 2867be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola ELFSymbolData &MSD, 2873565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming const MCAsmLayout &Layout); 2883565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 289bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola typedef DenseMap<const MCSectionELF*, uint32_t> SectionIndexMapTy; 290d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void WriteSymbolTable(MCDataFragment *SymtabF, MCDataFragment *ShndxF, 2917be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola const MCAssembler &Asm, 29271859c640f6a36251aca223fd503c58dc314e296Rafael Espindola const MCAsmLayout &Layout, 2934beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola const SectionIndexMapTy &SectionIndexMap); 2943565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 295d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void RecordRelocation(const MCAssembler &Asm, const MCAsmLayout &Layout, 29656a399023aba6cf1348533df04732950c43eaca7Jason W Kim const MCFragment *Fragment, const MCFixup &Fixup, 29756a399023aba6cf1348533df04732950c43eaca7Jason W Kim MCValue Target, uint64_t &FixedValue); 2983565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 299d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual uint64_t getSymbolIndexInSymbolTable(const MCAssembler &Asm, 3000b6cbfe04cb36872255aff11a41a2b976ceba462Benjamin Kramer const MCSymbol *S); 3013565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 3021f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola // Map from a group section to the signature symbol 3031f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola typedef DenseMap<const MCSectionELF*, const MCSymbol*> GroupMapTy; 3041f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola // Map from a signature symbol to the group section 3051f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola typedef DenseMap<const MCSymbol*, const MCSectionELF*> RevGroupMapTy; 3061f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola 3073565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// ComputeSymbolTable - Compute the symbol table data 3083565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// 3093565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// \param StringTable [out] - The string table data. 3103565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// \param StringIndexMap [out] - Map from symbol names to offsets in the 3113565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// string table. 312d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void ComputeSymbolTable(MCAssembler &Asm, 3131f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola const SectionIndexMapTy &SectionIndexMap, 3141f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola RevGroupMapTy RevGroupMap); 315bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola 316d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void ComputeIndexMap(MCAssembler &Asm, 317bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola SectionIndexMapTy &SectionIndexMap); 3183565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 319d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void WriteRelocation(MCAssembler &Asm, MCAsmLayout &Layout, 3203565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming const MCSectionData &SD); 3213565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 322d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void WriteRelocations(MCAssembler &Asm, MCAsmLayout &Layout) { 3233565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming for (MCAssembler::const_iterator it = Asm.begin(), 3243565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming ie = Asm.end(); it != ie; ++it) { 3253565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteRelocation(Asm, Layout, *it); 3263565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 3273565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 3283565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 329d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void CreateMetadataSections(MCAssembler &Asm, MCAsmLayout &Layout, 3304beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola const SectionIndexMapTy &SectionIndexMap); 3313565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 332d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void CreateGroupSections(MCAssembler &Asm, MCAsmLayout &Layout, 3331f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola GroupMapTy &GroupMap, RevGroupMapTy &RevGroupMap); 3342ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola 33585f2ecc697a8ca6c8cf08093054cbbb9d2060ccfRafael Espindola virtual void ExecutePostLayoutBinding(MCAssembler &Asm, 33685f2ecc697a8ca6c8cf08093054cbbb9d2060ccfRafael Espindola const MCAsmLayout &Layout); 3373565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 338d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void WriteSecHdrEntry(uint32_t Name, uint32_t Type, uint64_t Flags, 3393565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint64_t Address, uint64_t Offset, 3403565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint64_t Size, uint32_t Link, uint32_t Info, 3413565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint64_t Alignment, uint64_t EntrySize); 3423565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 3431f3662abba2abdf5a0ab77095834271fcf846579Daniel Dunbar virtual void WriteRelocationsFragment(const MCAssembler &Asm, 3441f3662abba2abdf5a0ab77095834271fcf846579Daniel Dunbar MCDataFragment *F, 3451f3662abba2abdf5a0ab77095834271fcf846579Daniel Dunbar const MCSectionData *SD); 3461f3662abba2abdf5a0ab77095834271fcf846579Daniel Dunbar 347fea753b397823c340608925eb7f3256a64a30017Rafael Espindola virtual bool 348fea753b397823c340608925eb7f3256a64a30017Rafael Espindola IsSymbolRefDifferenceFullyResolvedImpl(const MCAssembler &Asm, 349fea753b397823c340608925eb7f3256a64a30017Rafael Espindola const MCSymbolData &DataA, 350fea753b397823c340608925eb7f3256a64a30017Rafael Espindola const MCFragment &FB, 351fea753b397823c340608925eb7f3256a64a30017Rafael Espindola bool InSet, 352fea753b397823c340608925eb7f3256a64a30017Rafael Espindola bool IsPCRel) const; 3537070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola 354d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void WriteObject(MCAssembler &Asm, const MCAsmLayout &Layout); 355d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void WriteSection(MCAssembler &Asm, 356c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola const SectionIndexMapTy &SectionIndexMap, 3572ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola uint32_t GroupSymbolIndex, 358c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola uint64_t Offset, uint64_t Size, uint64_t Alignment, 359c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola const MCSectionELF &Section); 36056a399023aba6cf1348533df04732950c43eaca7Jason W Kim 36156a399023aba6cf1348533df04732950c43eaca7Jason W Kim protected: 36256a399023aba6cf1348533df04732950c43eaca7Jason W Kim virtual unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup, 36356a399023aba6cf1348533df04732950c43eaca7Jason W Kim bool IsPCRel, bool IsRelocWithSymbol, 36456a399023aba6cf1348533df04732950c43eaca7Jason W Kim int64_t Addend) = 0; 3653565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming }; 3663565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 367d3443e99e43945fdb0742177da06a32fa225740dJason W Kim //===- X86ELFObjectWriter -------------------------------------------===// 368d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 369d3443e99e43945fdb0742177da06a32fa225740dJason W Kim class X86ELFObjectWriter : public ELFObjectWriter { 370d3443e99e43945fdb0742177da06a32fa225740dJason W Kim public: 37131f3578b00a2ea85fb730b690f0478529103c748Rafael Espindola X86ELFObjectWriter(MCELFObjectTargetWriter *MOTW, 372bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola raw_ostream &_OS, 373bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola bool IsLittleEndian); 3744b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 375d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual ~X86ELFObjectWriter(); 37656a399023aba6cf1348533df04732950c43eaca7Jason W Kim protected: 37756a399023aba6cf1348533df04732950c43eaca7Jason W Kim virtual unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup, 37856a399023aba6cf1348533df04732950c43eaca7Jason W Kim bool IsPCRel, bool IsRelocWithSymbol, 37956a399023aba6cf1348533df04732950c43eaca7Jason W Kim int64_t Addend); 380d3443e99e43945fdb0742177da06a32fa225740dJason W Kim }; 381d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 382d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 383d3443e99e43945fdb0742177da06a32fa225740dJason W Kim //===- ARMELFObjectWriter -------------------------------------------===// 384d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 385d3443e99e43945fdb0742177da06a32fa225740dJason W Kim class ARMELFObjectWriter : public ELFObjectWriter { 386d3443e99e43945fdb0742177da06a32fa225740dJason W Kim public: 38731f3578b00a2ea85fb730b690f0478529103c748Rafael Espindola ARMELFObjectWriter(MCELFObjectTargetWriter *MOTW, 388bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola raw_ostream &_OS, 389bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola bool IsLittleEndian); 3904b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 391d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual ~ARMELFObjectWriter(); 39285fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim protected: 39356a399023aba6cf1348533df04732950c43eaca7Jason W Kim virtual unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup, 39456a399023aba6cf1348533df04732950c43eaca7Jason W Kim bool IsPCRel, bool IsRelocWithSymbol, 39556a399023aba6cf1348533df04732950c43eaca7Jason W Kim int64_t Addend); 396d3443e99e43945fdb0742177da06a32fa225740dJason W Kim }; 3974b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 3984b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck //===- MBlazeELFObjectWriter -------------------------------------------===// 3994b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 4004b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck class MBlazeELFObjectWriter : public ELFObjectWriter { 4014b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck public: 40231f3578b00a2ea85fb730b690f0478529103c748Rafael Espindola MBlazeELFObjectWriter(MCELFObjectTargetWriter *MOTW, 403bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola raw_ostream &_OS, 404bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola bool IsLittleEndian); 4054b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 4064b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck virtual ~MBlazeELFObjectWriter(); 40756a399023aba6cf1348533df04732950c43eaca7Jason W Kim protected: 40856a399023aba6cf1348533df04732950c43eaca7Jason W Kim virtual unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup, 40956a399023aba6cf1348533df04732950c43eaca7Jason W Kim bool IsPCRel, bool IsRelocWithSymbol, 41056a399023aba6cf1348533df04732950c43eaca7Jason W Kim int64_t Addend); 4114b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck }; 4123565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 4133565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 414d3443e99e43945fdb0742177da06a32fa225740dJason W KimELFObjectWriter::~ELFObjectWriter() 415d3443e99e43945fdb0742177da06a32fa225740dJason W Kim{} 416d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 4173565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming// Emit the ELF header. 418115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::WriteHeader(uint64_t SectionDataSize, 419115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar unsigned NumberOfSections) { 4203565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // ELF Header 4213565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // ---------- 4223565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // 4233565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Note 4243565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // ---- 4253565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // emitWord method behaves differently for ELF32 and ELF64, writing 4263565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // 4 bytes in the former and 8 in the latter. 4273565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4283565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write8(0x7f); // e_ident[EI_MAG0] 4293565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write8('E'); // e_ident[EI_MAG1] 4303565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write8('L'); // e_ident[EI_MAG2] 4313565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write8('F'); // e_ident[EI_MAG3] 4323565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 433bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola Write8(is64Bit() ? ELF::ELFCLASS64 : ELF::ELFCLASS32); // e_ident[EI_CLASS] 4343565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4353565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // e_ident[EI_DATA] 436115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar Write8(isLittleEndian() ? ELF::ELFDATA2LSB : ELF::ELFDATA2MSB); 4373565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4383565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write8(ELF::EV_CURRENT); // e_ident[EI_VERSION] 4395baf79edc067a4b17d024cc10324ac88c17e3e43Roman Divacky // e_ident[EI_OSABI] 440bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola switch (TargetObjectWriter->getOSType()) { 4415baf79edc067a4b17d024cc10324ac88c17e3e43Roman Divacky case Triple::FreeBSD: Write8(ELF::ELFOSABI_FREEBSD); break; 4425baf79edc067a4b17d024cc10324ac88c17e3e43Roman Divacky case Triple::Linux: Write8(ELF::ELFOSABI_LINUX); break; 4435baf79edc067a4b17d024cc10324ac88c17e3e43Roman Divacky default: Write8(ELF::ELFOSABI_NONE); break; 4445baf79edc067a4b17d024cc10324ac88c17e3e43Roman Divacky } 4453565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write8(0); // e_ident[EI_ABIVERSION] 4463565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4473565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteZeros(ELF::EI_NIDENT - ELF::EI_PAD); 4483565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4493565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write16(ELF::ET_REL); // e_type 4503565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 451bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola Write16(TargetObjectWriter->getEMachine()); // e_machine = target 4523565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4533565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write32(ELF::EV_CURRENT); // e_version 4543565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteWord(0); // e_entry, no entry point in .o file 4553565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteWord(0); // e_phoff, no program header for .o 456bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola WriteWord(SectionDataSize + (is64Bit() ? sizeof(ELF::Elf64_Ehdr) : 457eb97677764beb115c658ac559d3649c6c4068eb9Benjamin Kramer sizeof(ELF::Elf32_Ehdr))); // e_shoff = sec hdr table off in bytes 4583565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4593565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // FIXME: Make this configurable. 4603565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write32(0); // e_flags = whatever the target wants 4613565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4623565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // e_ehsize = ELF header size 463bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola Write16(is64Bit() ? sizeof(ELF::Elf64_Ehdr) : sizeof(ELF::Elf32_Ehdr)); 4643565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4653565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write16(0); // e_phentsize = prog header entry size 4663565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write16(0); // e_phnum = # prog header entries = 0 4673565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4683565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // e_shentsize = Section header entry size 469bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola Write16(is64Bit() ? sizeof(ELF::Elf64_Shdr) : sizeof(ELF::Elf32_Shdr)); 4703565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4713565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // e_shnum = # of section header ents 4727be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola if (NumberOfSections >= ELF::SHN_LORESERVE) 4737be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola Write16(0); 4747be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola else 4757be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola Write16(NumberOfSections); 4763565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4773565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // e_shstrndx = Section # of '.shstrtab' 4787be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola if (NumberOfSections >= ELF::SHN_LORESERVE) 4797be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola Write16(ELF::SHN_XINDEX); 4807be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola else 4817be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola Write16(ShstrtabIndex); 4823565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 4833565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 484115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::WriteSymbolEntry(MCDataFragment *SymtabF, 485115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar MCDataFragment *ShndxF, 486115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint64_t name, 487115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint8_t info, uint64_t value, 488115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint64_t size, uint8_t other, 489115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint32_t shndx, 490115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar bool Reserved) { 4917be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola if (ShndxF) { 4927be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola if (shndx >= ELF::SHN_LORESERVE && !Reserved) 493af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String32(*ShndxF, shndx); 4947be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola else 495af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String32(*ShndxF, 0); 4967be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola } 4977be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola 498af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola uint16_t Index = (shndx >= ELF::SHN_LORESERVE && !Reserved) ? 499af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola uint16_t(ELF::SHN_XINDEX) : shndx; 5003565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 501bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola if (is64Bit()) { 502af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String32(*SymtabF, name); // st_name 503af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String8(*SymtabF, info); // st_info 504af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String8(*SymtabF, other); // st_other 505af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String16(*SymtabF, Index); // st_shndx 506af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String64(*SymtabF, value); // st_value 507af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String64(*SymtabF, size); // st_size 5083565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } else { 509af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String32(*SymtabF, name); // st_name 510af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String32(*SymtabF, value); // st_value 511af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String32(*SymtabF, size); // st_size 512af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String8(*SymtabF, info); // st_info 513af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String8(*SymtabF, other); // st_other 514af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String16(*SymtabF, Index); // st_shndx 5153565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 5163565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 5173565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 5182c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindolastatic uint64_t SymbolValue(MCSymbolData &Data, const MCAsmLayout &Layout) { 5192c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola if (Data.isCommon() && Data.isExternal()) 5202c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola return Data.getCommonAlignment(); 5212c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola 5222c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola const MCSymbol &Symbol = Data.getSymbol(); 523d149186e156fdd44e3cca988949cf3e5e6940863Roman Divacky 524d149186e156fdd44e3cca988949cf3e5e6940863Roman Divacky if (Symbol.isAbsolute() && Symbol.isVariable()) { 525d149186e156fdd44e3cca988949cf3e5e6940863Roman Divacky if (const MCExpr *Value = Symbol.getVariableValue()) { 526d149186e156fdd44e3cca988949cf3e5e6940863Roman Divacky int64_t IntValue; 527d149186e156fdd44e3cca988949cf3e5e6940863Roman Divacky if (Value->EvaluateAsAbsolute(IntValue, Layout)) 528d149186e156fdd44e3cca988949cf3e5e6940863Roman Divacky return (uint64_t)IntValue; 529d149186e156fdd44e3cca988949cf3e5e6940863Roman Divacky } 530d149186e156fdd44e3cca988949cf3e5e6940863Roman Divacky } 531d149186e156fdd44e3cca988949cf3e5e6940863Roman Divacky 5322c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola if (!Symbol.isInSection()) 5332c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola return 0; 5342c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola 535ffd902bfb743f0564c8f7689c49403074b6f694dRafael Espindola if (Data.getFragment()) 536ffd902bfb743f0564c8f7689c49403074b6f694dRafael Espindola return Layout.getSymbolOffset(&Data); 5372c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola 5382c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola return 0; 5392c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola} 5402c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola 54185f2ecc697a8ca6c8cf08093054cbbb9d2060ccfRafael Espindolavoid ELFObjectWriter::ExecutePostLayoutBinding(MCAssembler &Asm, 54285f2ecc697a8ca6c8cf08093054cbbb9d2060ccfRafael Espindola const MCAsmLayout &Layout) { 54388182132470527e27231f09b25a885893e528c66Rafael Espindola // The presence of symbol versions causes undefined symbols and 54488182132470527e27231f09b25a885893e528c66Rafael Espindola // versions declared with @@@ to be renamed. 54588182132470527e27231f09b25a885893e528c66Rafael Espindola 54688182132470527e27231f09b25a885893e528c66Rafael Espindola for (MCAssembler::symbol_iterator it = Asm.symbol_begin(), 54788182132470527e27231f09b25a885893e528c66Rafael Espindola ie = Asm.symbol_end(); it != ie; ++it) { 54888182132470527e27231f09b25a885893e528c66Rafael Espindola const MCSymbol &Alias = it->getSymbol(); 54994ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola const MCSymbol &Symbol = Alias.AliasedSymbol(); 550f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola MCSymbolData &SD = Asm.getSymbolData(Symbol); 551f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola 552f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola // Not an alias. 553f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola if (&Symbol == &Alias) 554f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola continue; 555f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola 55607ee63283cc2b9a4d6c98ecd30d1b721fe3cb29aBenjamin Kramer StringRef AliasName = Alias.getName(); 55788182132470527e27231f09b25a885893e528c66Rafael Espindola size_t Pos = AliasName.find('@'); 55888182132470527e27231f09b25a885893e528c66Rafael Espindola if (Pos == StringRef::npos) 55988182132470527e27231f09b25a885893e528c66Rafael Espindola continue; 56088182132470527e27231f09b25a885893e528c66Rafael Espindola 561f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola // Aliases defined with .symvar copy the binding from the symbol they alias. 562f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola // This is the first place we are able to copy this information. 563f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola it->setExternal(SD.isExternal()); 564f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola SetBinding(*it, GetBinding(SD)); 565f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola 56607ee63283cc2b9a4d6c98ecd30d1b721fe3cb29aBenjamin Kramer StringRef Rest = AliasName.substr(Pos); 56788182132470527e27231f09b25a885893e528c66Rafael Espindola if (!Symbol.isUndefined() && !Rest.startswith("@@@")) 56888182132470527e27231f09b25a885893e528c66Rafael Espindola continue; 56988182132470527e27231f09b25a885893e528c66Rafael Espindola 57083ff4d2b0d6133d48055a27fe25c5d241bca7e9bRafael Espindola // FIXME: produce a better error message. 57183ff4d2b0d6133d48055a27fe25c5d241bca7e9bRafael Espindola if (Symbol.isUndefined() && Rest.startswith("@@") && 57283ff4d2b0d6133d48055a27fe25c5d241bca7e9bRafael Espindola !Rest.startswith("@@@")) 57383ff4d2b0d6133d48055a27fe25c5d241bca7e9bRafael Espindola report_fatal_error("A @@ version cannot be undefined"); 57483ff4d2b0d6133d48055a27fe25c5d241bca7e9bRafael Espindola 57507ee63283cc2b9a4d6c98ecd30d1b721fe3cb29aBenjamin Kramer Renames.insert(std::make_pair(&Symbol, &Alias)); 57688182132470527e27231f09b25a885893e528c66Rafael Espindola } 57788182132470527e27231f09b25a885893e528c66Rafael Espindola} 57888182132470527e27231f09b25a885893e528c66Rafael Espindola 579115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::WriteSymbol(MCDataFragment *SymtabF, 580115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar MCDataFragment *ShndxF, 581115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar ELFSymbolData &MSD, 582115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const MCAsmLayout &Layout) { 583de89b010b0b347cdbd1bc9553a970880a3e721bfRafael Espindola MCSymbolData &OrigData = *MSD.SymbolData; 584de89b010b0b347cdbd1bc9553a970880a3e721bfRafael Espindola MCSymbolData &Data = 58594ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola Layout.getAssembler().getSymbolData(OrigData.getSymbol().AliasedSymbol()); 586152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola 5877be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola bool IsReserved = Data.isCommon() || Data.getSymbol().isAbsolute() || 5887be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola Data.getSymbol().isVariable(); 5897be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola 590152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola uint8_t Binding = GetBinding(OrigData); 591152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola uint8_t Visibility = GetVisibility(OrigData); 592152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola uint8_t Type = GetType(Data); 593152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola 594152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola uint8_t Info = (Binding << ELF_STB_Shift) | (Type << ELF_STT_Shift); 595152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola uint8_t Other = Visibility; 596152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola 5972c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola uint64_t Value = SymbolValue(Data, Layout); 5983565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint64_t Size = 0; 5993565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 600f7c10a3cff61c70efe8e405d9bdc5386e8e3fc0aRafael Espindola assert(!(Data.isCommon() && !Data.isExternal())); 601f7c10a3cff61c70efe8e405d9bdc5386e8e3fc0aRafael Espindola 602f01212489be07e261a0302744f878a54a39f05a5Rafael Espindola const MCExpr *ESize = Data.getSize(); 603f01212489be07e261a0302744f878a54a39f05a5Rafael Espindola if (ESize) { 604f01212489be07e261a0302744f878a54a39f05a5Rafael Espindola int64_t Res; 605f01212489be07e261a0302744f878a54a39f05a5Rafael Espindola if (!ESize->EvaluateAsAbsolute(Res, Layout)) 606f01212489be07e261a0302744f878a54a39f05a5Rafael Espindola report_fatal_error("Size expression must be absolute."); 607f01212489be07e261a0302744f878a54a39f05a5Rafael Espindola Size = Res; 6083565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 6093565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 6103565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Write out the symbol table entry 6117be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola WriteSymbolEntry(SymtabF, ShndxF, MSD.StringIndex, Info, Value, 6127be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola Size, Other, MSD.SectionIndex, IsReserved); 6133565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 6143565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 615115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::WriteSymbolTable(MCDataFragment *SymtabF, 616115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar MCDataFragment *ShndxF, 617115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const MCAssembler &Asm, 618115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const MCAsmLayout &Layout, 6194beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola const SectionIndexMapTy &SectionIndexMap) { 6203565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // The string table must be emitted first because we need the index 6213565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // into the string table for all the symbol names. 6223565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming assert(StringTable.size() && "Missing string table"); 6233565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 6243565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // FIXME: Make sure the start of the symbol table is aligned. 6253565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 6263565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // The first entry is the undefined symbol entry. 6277be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola WriteSymbolEntry(SymtabF, ShndxF, 0, 0, 0, 0, 0, 0, false); 6283565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 6293565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Write the symbol table entries. 6303565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming LastLocalSymbolIndex = LocalSymbolData.size() + 1; 6313565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming for (unsigned i = 0, e = LocalSymbolData.size(); i != e; ++i) { 6323565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming ELFSymbolData &MSD = LocalSymbolData[i]; 6337be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola WriteSymbol(SymtabF, ShndxF, MSD, Layout); 6343565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 6353565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 63671859c640f6a36251aca223fd503c58dc314e296Rafael Espindola // Write out a symbol table entry for each regular section. 6374beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola for (MCAssembler::const_iterator i = Asm.begin(), e = Asm.end(); i != e; 6384beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola ++i) { 639a44fa2473a5f2a13730d44e0aea8897b5656b555Eli Friedman const MCSectionELF &Section = 6404beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola static_cast<const MCSectionELF&>(i->getSection()); 6414beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola if (Section.getType() == ELF::SHT_RELA || 6424beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola Section.getType() == ELF::SHT_REL || 6434beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola Section.getType() == ELF::SHT_STRTAB || 6444beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola Section.getType() == ELF::SHT_SYMTAB) 645a44fa2473a5f2a13730d44e0aea8897b5656b555Eli Friedman continue; 6467be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola WriteSymbolEntry(SymtabF, ShndxF, 0, ELF::STT_SECTION, 0, 0, 6474beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola ELF::STV_DEFAULT, SectionIndexMap.lookup(&Section), false); 648a44fa2473a5f2a13730d44e0aea8897b5656b555Eli Friedman LastLocalSymbolIndex++; 649a44fa2473a5f2a13730d44e0aea8897b5656b555Eli Friedman } 6503565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 6513565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming for (unsigned i = 0, e = ExternalSymbolData.size(); i != e; ++i) { 6523565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming ELFSymbolData &MSD = ExternalSymbolData[i]; 6533565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCSymbolData &Data = *MSD.SymbolData; 6543223f19ff0920ffee686faba3bf74babf580e8a5Rafael Espindola assert(((Data.getFlags() & ELF_STB_Global) || 6553223f19ff0920ffee686faba3bf74babf580e8a5Rafael Espindola (Data.getFlags() & ELF_STB_Weak)) && 6563223f19ff0920ffee686faba3bf74babf580e8a5Rafael Espindola "External symbol requires STB_GLOBAL or STB_WEAK flag"); 6577be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola WriteSymbol(SymtabF, ShndxF, MSD, Layout); 658e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola if (GetBinding(Data) == ELF::STB_LOCAL) 6593565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming LastLocalSymbolIndex++; 6603565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 6613565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 6623565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming for (unsigned i = 0, e = UndefinedSymbolData.size(); i != e; ++i) { 6633565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming ELFSymbolData &MSD = UndefinedSymbolData[i]; 6643565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCSymbolData &Data = *MSD.SymbolData; 6657be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola WriteSymbol(SymtabF, ShndxF, MSD, Layout); 666e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola if (GetBinding(Data) == ELF::STB_LOCAL) 6673565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming LastLocalSymbolIndex++; 6683565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 6693565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 6703565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 6711f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindolaconst MCSymbol *ELFObjectWriter::SymbolToReloc(const MCAssembler &Asm, 6721f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola const MCValue &Target, 6731f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola const MCFragment &F) const { 6741f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola const MCSymbol &Symbol = Target.getSymA()->getSymbol(); 67594ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola const MCSymbol &ASymbol = Symbol.AliasedSymbol(); 67694ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola const MCSymbol *Renamed = Renames.lookup(&Symbol); 67794ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola const MCSymbolData &SD = Asm.getSymbolData(Symbol); 67894ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola 67994ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola if (ASymbol.isUndefined()) { 68094ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola if (Renamed) 68194ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola return Renamed; 68294ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola return &ASymbol; 6831f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola } 6841f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola 68594ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola if (SD.isExternal()) { 68694ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola if (Renamed) 68794ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola return Renamed; 68894ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola return &Symbol; 68994ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola } 6907eae36b38b874f417fa191fc1cfec22c100f164dRafael Espindola 6917eae36b38b874f417fa191fc1cfec22c100f164dRafael Espindola const MCSectionELF &Section = 69294ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola static_cast<const MCSectionELF&>(ASymbol.getSection()); 69325958730dffe0a16f9c251a1fa317799b8419a1fRafael Espindola const SectionKind secKind = Section.getKind(); 6947eae36b38b874f417fa191fc1cfec22c100f164dRafael Espindola 69525958730dffe0a16f9c251a1fa317799b8419a1fRafael Espindola if (secKind.isBSS()) 6961f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola return NULL; 6977eae36b38b874f417fa191fc1cfec22c100f164dRafael Espindola 69825958730dffe0a16f9c251a1fa317799b8419a1fRafael Espindola if (secKind.isThreadLocal()) { 69925958730dffe0a16f9c251a1fa317799b8419a1fRafael Espindola if (Renamed) 70025958730dffe0a16f9c251a1fa317799b8419a1fRafael Espindola return Renamed; 70125958730dffe0a16f9c251a1fa317799b8419a1fRafael Espindola return &Symbol; 70225958730dffe0a16f9c251a1fa317799b8419a1fRafael Espindola } 70325958730dffe0a16f9c251a1fa317799b8419a1fRafael Espindola 7048cecf253e45f144b9a7fd0ace85eeeeb0bebfc83Rafael Espindola MCSymbolRefExpr::VariantKind Kind = Target.getSymA()->getKind(); 7053729d0052bda365d04fee900c6f3d09460f1e108Rafael Espindola const MCSectionELF &Sec2 = 7063729d0052bda365d04fee900c6f3d09460f1e108Rafael Espindola static_cast<const MCSectionELF&>(F.getParent()->getSection()); 7073729d0052bda365d04fee900c6f3d09460f1e108Rafael Espindola 7088cecf253e45f144b9a7fd0ace85eeeeb0bebfc83Rafael Espindola if (&Sec2 != &Section && 709c97f80efc80030c7544a9903c79d2dccd197a0ffRafael Espindola (Kind == MCSymbolRefExpr::VK_PLT || 710c97f80efc80030c7544a9903c79d2dccd197a0ffRafael Espindola Kind == MCSymbolRefExpr::VK_GOTPCREL || 71125958730dffe0a16f9c251a1fa317799b8419a1fRafael Espindola Kind == MCSymbolRefExpr::VK_GOTOFF)) { 71294ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola if (Renamed) 71394ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola return Renamed; 71494ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola return &Symbol; 71594ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola } 7163729d0052bda365d04fee900c6f3d09460f1e108Rafael Espindola 7171f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola if (Section.getFlags() & MCSectionELF::SHF_MERGE) { 71894ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola if (Target.getConstant() == 0) 71994ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola return NULL; 72094ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola if (Renamed) 72194ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola return Renamed; 72294ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola return &Symbol; 7231f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola } 724c97f80efc80030c7544a9903c79d2dccd197a0ffRafael Espindola 7251f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola return NULL; 72673ffea47d20bc9f559b4ce0c60166ee504073832Rafael Espindola} 72773ffea47d20bc9f559b4ce0c60166ee504073832Rafael Espindola 7283565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 72956a399023aba6cf1348533df04732950c43eaca7Jason W Kimvoid ELFObjectWriter::RecordRelocation(const MCAssembler &Asm, 73056a399023aba6cf1348533df04732950c43eaca7Jason W Kim const MCAsmLayout &Layout, 73156a399023aba6cf1348533df04732950c43eaca7Jason W Kim const MCFragment *Fragment, 73256a399023aba6cf1348533df04732950c43eaca7Jason W Kim const MCFixup &Fixup, 73356a399023aba6cf1348533df04732950c43eaca7Jason W Kim MCValue Target, 73456a399023aba6cf1348533df04732950c43eaca7Jason W Kim uint64_t &FixedValue) { 73556a399023aba6cf1348533df04732950c43eaca7Jason W Kim int64_t Addend = 0; 73656a399023aba6cf1348533df04732950c43eaca7Jason W Kim int Index = 0; 73756a399023aba6cf1348533df04732950c43eaca7Jason W Kim int64_t Value = Target.getConstant(); 73856a399023aba6cf1348533df04732950c43eaca7Jason W Kim const MCSymbol *RelocSymbol = NULL; 73956a399023aba6cf1348533df04732950c43eaca7Jason W Kim 740127a6a47bd779f0e1e5274422537cdaac3ab2ca7Rafael Espindola bool IsPCRel = isFixupKindPCRel(Asm, Fixup.getKind()); 74156a399023aba6cf1348533df04732950c43eaca7Jason W Kim if (!Target.isAbsolute()) { 74256a399023aba6cf1348533df04732950c43eaca7Jason W Kim const MCSymbol &Symbol = Target.getSymA()->getSymbol(); 74356a399023aba6cf1348533df04732950c43eaca7Jason W Kim const MCSymbol &ASymbol = Symbol.AliasedSymbol(); 74456a399023aba6cf1348533df04732950c43eaca7Jason W Kim RelocSymbol = SymbolToReloc(Asm, Target, *Fragment); 74556a399023aba6cf1348533df04732950c43eaca7Jason W Kim 74656a399023aba6cf1348533df04732950c43eaca7Jason W Kim if (const MCSymbolRefExpr *RefB = Target.getSymB()) { 74756a399023aba6cf1348533df04732950c43eaca7Jason W Kim const MCSymbol &SymbolB = RefB->getSymbol(); 74856a399023aba6cf1348533df04732950c43eaca7Jason W Kim MCSymbolData &SDB = Asm.getSymbolData(SymbolB); 74956a399023aba6cf1348533df04732950c43eaca7Jason W Kim IsPCRel = true; 75056a399023aba6cf1348533df04732950c43eaca7Jason W Kim 75156a399023aba6cf1348533df04732950c43eaca7Jason W Kim // Offset of the symbol in the section 75256a399023aba6cf1348533df04732950c43eaca7Jason W Kim int64_t a = Layout.getSymbolOffset(&SDB); 75356a399023aba6cf1348533df04732950c43eaca7Jason W Kim 75456a399023aba6cf1348533df04732950c43eaca7Jason W Kim // Ofeset of the relocation in the section 75556a399023aba6cf1348533df04732950c43eaca7Jason W Kim int64_t b = Layout.getFragmentOffset(Fragment) + Fixup.getOffset(); 75656a399023aba6cf1348533df04732950c43eaca7Jason W Kim Value += b - a; 75756a399023aba6cf1348533df04732950c43eaca7Jason W Kim } 75856a399023aba6cf1348533df04732950c43eaca7Jason W Kim 75956a399023aba6cf1348533df04732950c43eaca7Jason W Kim if (!RelocSymbol) { 76056a399023aba6cf1348533df04732950c43eaca7Jason W Kim MCSymbolData &SD = Asm.getSymbolData(ASymbol); 76156a399023aba6cf1348533df04732950c43eaca7Jason W Kim MCFragment *F = SD.getFragment(); 76256a399023aba6cf1348533df04732950c43eaca7Jason W Kim 76356a399023aba6cf1348533df04732950c43eaca7Jason W Kim Index = F->getParent()->getOrdinal() + 1; 76456a399023aba6cf1348533df04732950c43eaca7Jason W Kim 76556a399023aba6cf1348533df04732950c43eaca7Jason W Kim // Offset of the symbol in the section 76656a399023aba6cf1348533df04732950c43eaca7Jason W Kim Value += Layout.getSymbolOffset(&SD); 76756a399023aba6cf1348533df04732950c43eaca7Jason W Kim } else { 76856a399023aba6cf1348533df04732950c43eaca7Jason W Kim if (Asm.getSymbolData(Symbol).getFlags() & ELF_Other_Weakref) 76956a399023aba6cf1348533df04732950c43eaca7Jason W Kim WeakrefUsedInReloc.insert(RelocSymbol); 77056a399023aba6cf1348533df04732950c43eaca7Jason W Kim else 77156a399023aba6cf1348533df04732950c43eaca7Jason W Kim UsedInReloc.insert(RelocSymbol); 77256a399023aba6cf1348533df04732950c43eaca7Jason W Kim Index = -1; 77356a399023aba6cf1348533df04732950c43eaca7Jason W Kim } 77456a399023aba6cf1348533df04732950c43eaca7Jason W Kim Addend = Value; 77556a399023aba6cf1348533df04732950c43eaca7Jason W Kim // Compensate for the addend on i386. 776bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola if (is64Bit()) 77756a399023aba6cf1348533df04732950c43eaca7Jason W Kim Value = 0; 77856a399023aba6cf1348533df04732950c43eaca7Jason W Kim } 77956a399023aba6cf1348533df04732950c43eaca7Jason W Kim 78056a399023aba6cf1348533df04732950c43eaca7Jason W Kim FixedValue = Value; 78156a399023aba6cf1348533df04732950c43eaca7Jason W Kim unsigned Type = GetRelocType(Target, Fixup, IsPCRel, 78256a399023aba6cf1348533df04732950c43eaca7Jason W Kim (RelocSymbol != 0), Addend); 78356a399023aba6cf1348533df04732950c43eaca7Jason W Kim 78456a399023aba6cf1348533df04732950c43eaca7Jason W Kim uint64_t RelocOffset = Layout.getFragmentOffset(Fragment) + 78556a399023aba6cf1348533df04732950c43eaca7Jason W Kim Fixup.getOffset(); 78656a399023aba6cf1348533df04732950c43eaca7Jason W Kim 787bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola if (!hasRelocationAddend()) 788bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola Addend = 0; 78956a399023aba6cf1348533df04732950c43eaca7Jason W Kim ELFRelocationEntry ERE(RelocOffset, Index, Type, RelocSymbol, Addend); 79056a399023aba6cf1348533df04732950c43eaca7Jason W Kim Relocations[Fragment->getParent()].push_back(ERE); 79156a399023aba6cf1348533df04732950c43eaca7Jason W Kim} 79256a399023aba6cf1348533df04732950c43eaca7Jason W Kim 79356a399023aba6cf1348533df04732950c43eaca7Jason W Kim 7940b6cbfe04cb36872255aff11a41a2b976ceba462Benjamin Krameruint64_t 795115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel DunbarELFObjectWriter::getSymbolIndexInSymbolTable(const MCAssembler &Asm, 796115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const MCSymbol *S) { 7977b83c26051b0474fb5f8b73ba6e74bd4f40324baBenjamin Kramer MCSymbolData &SD = Asm.getSymbolData(*S); 798ab4a7afe98fcd86418bd1672f880b7d3672f4543Rafael Espindola return SD.getIndex(); 7993565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 8003565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 801737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindolastatic bool isInSymtab(const MCAssembler &Asm, const MCSymbolData &Data, 80288182132470527e27231f09b25a885893e528c66Rafael Espindola bool Used, bool Renamed) { 803484291c27319668ad99cb87def000254357736fbRafael Espindola if (Data.getFlags() & ELF_Other_Weakref) 804484291c27319668ad99cb87def000254357736fbRafael Espindola return false; 805484291c27319668ad99cb87def000254357736fbRafael Espindola 806bd70118f163f94a4d77eb036e6f83dd0bfcb6268Rafael Espindola if (Used) 807bd70118f163f94a4d77eb036e6f83dd0bfcb6268Rafael Espindola return true; 808bd70118f163f94a4d77eb036e6f83dd0bfcb6268Rafael Espindola 80988182132470527e27231f09b25a885893e528c66Rafael Espindola if (Renamed) 81088182132470527e27231f09b25a885893e528c66Rafael Espindola return false; 81188182132470527e27231f09b25a885893e528c66Rafael Espindola 812737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola const MCSymbol &Symbol = Data.getSymbol(); 813a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola 814d179886f0595eb3564a9edfdfff79def130d89ccRafael Espindola if (Symbol.getName() == "_GLOBAL_OFFSET_TABLE_") 815d179886f0595eb3564a9edfdfff79def130d89ccRafael Espindola return true; 816d179886f0595eb3564a9edfdfff79def130d89ccRafael Espindola 81794ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola const MCSymbol &A = Symbol.AliasedSymbol(); 818d179886f0595eb3564a9edfdfff79def130d89ccRafael Espindola if (!A.isVariable() && A.isUndefined() && !Data.isCommon()) 819a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola return false; 820a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola 821737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola if (!Asm.isSymbolLinkerVisible(Symbol) && !Symbol.isUndefined()) 822737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola return false; 823737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola 824bd70118f163f94a4d77eb036e6f83dd0bfcb6268Rafael Espindola if (Symbol.isTemporary()) 825737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola return false; 826737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola 827737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola return true; 828737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola} 829737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola 8301f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindolastatic bool isLocal(const MCSymbolData &Data, bool isSignature, 8311f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola bool isUsedInReloc) { 832737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola if (Data.isExternal()) 833737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola return false; 834737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola 835737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola const MCSymbol &Symbol = Data.getSymbol(); 83694ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola const MCSymbol &RefSymbol = Symbol.AliasedSymbol(); 8371f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola 8381f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola if (RefSymbol.isUndefined() && !RefSymbol.isVariable()) { 8391f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola if (isSignature && !isUsedInReloc) 8401f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola return true; 8411f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola 842737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola return false; 8431f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola } 844737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola 845737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola return true; 846737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola} 847737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola 848115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::ComputeIndexMap(MCAssembler &Asm, 849115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar SectionIndexMapTy &SectionIndexMap) { 850bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola unsigned Index = 1; 851bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola for (MCAssembler::iterator it = Asm.begin(), 852bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola ie = Asm.end(); it != ie; ++it) { 853bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola const MCSectionELF &Section = 854bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola static_cast<const MCSectionELF &>(it->getSection()); 8552ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola if (Section.getType() != ELF::SHT_GROUP) 8562ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola continue; 8572ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola SectionIndexMap[&Section] = Index++; 8582ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola } 8592ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola 8602ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola for (MCAssembler::iterator it = Asm.begin(), 8612ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola ie = Asm.end(); it != ie; ++it) { 8622ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSectionELF &Section = 8632ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola static_cast<const MCSectionELF &>(it->getSection()); 8642ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola if (Section.getType() == ELF::SHT_GROUP) 8652ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola continue; 866bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola SectionIndexMap[&Section] = Index++; 867bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola } 868bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola} 869bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola 870115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::ComputeSymbolTable(MCAssembler &Asm, 8711f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola const SectionIndexMapTy &SectionIndexMap, 8721f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola RevGroupMapTy RevGroupMap) { 8735c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola // FIXME: Is this the correct place to do this? 8745c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola if (NeedsGOT) { 8755c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola llvm::StringRef Name = "_GLOBAL_OFFSET_TABLE_"; 8765c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola MCSymbol *Sym = Asm.getContext().GetOrCreateSymbol(Name); 8775c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola MCSymbolData &Data = Asm.getOrCreateSymbolData(*Sym); 8785c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola Data.setExternal(true); 879f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola SetBinding(Data, ELF::STB_GLOBAL); 8805c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola } 8815c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola 8823565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Build section lookup table. 883ab4a7afe98fcd86418bd1672f880b7d3672f4543Rafael Espindola int NumRegularSections = Asm.size(); 8843565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 8853565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Index 0 is always the empty string. 8863565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming StringMap<uint64_t> StringIndexMap; 8873565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming StringTable += '\x00'; 8883565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 889a0949b50dcea35c08b50542091f97275f401529dRafael Espindola // Add the data for the symbols. 8903565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming for (MCAssembler::symbol_iterator it = Asm.symbol_begin(), 8913565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming ie = Asm.symbol_end(); it != ie; ++it) { 8923565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming const MCSymbol &Symbol = it->getSymbol(); 8933565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 894484291c27319668ad99cb87def000254357736fbRafael Espindola bool Used = UsedInReloc.count(&Symbol); 895484291c27319668ad99cb87def000254357736fbRafael Espindola bool WeakrefUsed = WeakrefUsedInReloc.count(&Symbol); 8961f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola bool isSignature = RevGroupMap.count(&Symbol); 8971f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola 8981f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola if (!isInSymtab(Asm, *it, 8991f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola Used || WeakrefUsed || isSignature, 90088182132470527e27231f09b25a885893e528c66Rafael Espindola Renames.count(&Symbol))) 9013565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming continue; 9023565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 9033565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming ELFSymbolData MSD; 9043565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MSD.SymbolData = it; 90594ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola const MCSymbol &RefSymbol = Symbol.AliasedSymbol(); 9063565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 9071f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola // Undefined symbols are global, but this is the first place we 9081f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola // are able to set it. 9091f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola bool Local = isLocal(*it, isSignature, Used); 9101f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola if (!Local && GetBinding(*it) == ELF::STB_LOCAL) { 9111f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola MCSymbolData &SD = Asm.getSymbolData(RefSymbol); 9121f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola SetBinding(*it, ELF::STB_GLOBAL); 9131f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola SetBinding(SD, ELF::STB_GLOBAL); 9141f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola } 9151f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola 916484291c27319668ad99cb87def000254357736fbRafael Espindola if (RefSymbol.isUndefined() && !Used && WeakrefUsed) 917484291c27319668ad99cb87def000254357736fbRafael Espindola SetBinding(*it, ELF::STB_WEAK); 918484291c27319668ad99cb87def000254357736fbRafael Espindola 919f7c10a3cff61c70efe8e405d9bdc5386e8e3fc0aRafael Espindola if (it->isCommon()) { 920a0949b50dcea35c08b50542091f97275f401529dRafael Espindola assert(!Local); 921f7c10a3cff61c70efe8e405d9bdc5386e8e3fc0aRafael Espindola MSD.SectionIndex = ELF::SHN_COMMON; 922bf052ac5d1c8f21075bc675f629709c20791c5f7Rafael Espindola } else if (Symbol.isAbsolute() || RefSymbol.isVariable()) { 923a0949b50dcea35c08b50542091f97275f401529dRafael Espindola MSD.SectionIndex = ELF::SHN_ABS; 92488182132470527e27231f09b25a885893e528c66Rafael Espindola } else if (RefSymbol.isUndefined()) { 9251f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola if (isSignature && !Used) 9261f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola MSD.SectionIndex = SectionIndexMap.lookup(RevGroupMap[&Symbol]); 9271f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola else 9281f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola MSD.SectionIndex = ELF::SHN_UNDEF; 9293565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } else { 930bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola const MCSectionELF &Section = 931bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola static_cast<const MCSectionELF&>(RefSymbol.getSection()); 932bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola MSD.SectionIndex = SectionIndexMap.lookup(&Section); 9337be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola if (MSD.SectionIndex >= ELF::SHN_LORESERVE) 9347be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola NeedsSymtabShndx = true; 9353565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming assert(MSD.SectionIndex && "Invalid section index!"); 9365df0b65e8f5ef55f0b515a0b24879f5d117d6042Rafael Espindola } 9375df0b65e8f5ef55f0b515a0b24879f5d117d6042Rafael Espindola 93888182132470527e27231f09b25a885893e528c66Rafael Espindola // The @@@ in symbol version is replaced with @ in undefined symbols and 93988182132470527e27231f09b25a885893e528c66Rafael Espindola // @@ in defined ones. 94088182132470527e27231f09b25a885893e528c66Rafael Espindola StringRef Name = Symbol.getName(); 9411261a2ff99299946952013f284615a06afa3dc50Benjamin Kramer SmallString<32> Buf; 9421261a2ff99299946952013f284615a06afa3dc50Benjamin Kramer 94388182132470527e27231f09b25a885893e528c66Rafael Espindola size_t Pos = Name.find("@@@"); 94488182132470527e27231f09b25a885893e528c66Rafael Espindola if (Pos != StringRef::npos) { 9451261a2ff99299946952013f284615a06afa3dc50Benjamin Kramer Buf += Name.substr(0, Pos); 9461261a2ff99299946952013f284615a06afa3dc50Benjamin Kramer unsigned Skip = MSD.SectionIndex == ELF::SHN_UNDEF ? 2 : 1; 9471261a2ff99299946952013f284615a06afa3dc50Benjamin Kramer Buf += Name.substr(Pos + Skip); 9481261a2ff99299946952013f284615a06afa3dc50Benjamin Kramer Name = Buf; 94988182132470527e27231f09b25a885893e528c66Rafael Espindola } 95088182132470527e27231f09b25a885893e528c66Rafael Espindola 9511261a2ff99299946952013f284615a06afa3dc50Benjamin Kramer uint64_t &Entry = StringIndexMap[Name]; 952a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola if (!Entry) { 953a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola Entry = StringTable.size(); 9541261a2ff99299946952013f284615a06afa3dc50Benjamin Kramer StringTable += Name; 955a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola StringTable += '\x00'; 9563565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 957a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola MSD.StringIndex = Entry; 958a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola if (MSD.SectionIndex == ELF::SHN_UNDEF) 959a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola UndefinedSymbolData.push_back(MSD); 960a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola else if (Local) 961a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola LocalSymbolData.push_back(MSD); 962a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola else 963a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola ExternalSymbolData.push_back(MSD); 9643565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 9653565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 9663565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Symbols are required to be in lexicographic order. 9673565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming array_pod_sort(LocalSymbolData.begin(), LocalSymbolData.end()); 9683565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming array_pod_sort(ExternalSymbolData.begin(), ExternalSymbolData.end()); 9693565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming array_pod_sort(UndefinedSymbolData.begin(), UndefinedSymbolData.end()); 9703565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 9713565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Set the symbol indices. Local symbols must come before all other 9723565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // symbols with non-local bindings. 973ab4a7afe98fcd86418bd1672f880b7d3672f4543Rafael Espindola unsigned Index = 1; 9743565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming for (unsigned i = 0, e = LocalSymbolData.size(); i != e; ++i) 9753565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming LocalSymbolData[i].SymbolData->setIndex(Index++); 976ab4a7afe98fcd86418bd1672f880b7d3672f4543Rafael Espindola 977ab4a7afe98fcd86418bd1672f880b7d3672f4543Rafael Espindola Index += NumRegularSections; 978ab4a7afe98fcd86418bd1672f880b7d3672f4543Rafael Espindola 9793565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming for (unsigned i = 0, e = ExternalSymbolData.size(); i != e; ++i) 9803565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming ExternalSymbolData[i].SymbolData->setIndex(Index++); 9813565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming for (unsigned i = 0, e = UndefinedSymbolData.size(); i != e; ++i) 9823565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming UndefinedSymbolData[i].SymbolData->setIndex(Index++); 9833565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 9843565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 985115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::WriteRelocation(MCAssembler &Asm, MCAsmLayout &Layout, 986115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const MCSectionData &SD) { 9873565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming if (!Relocations[&SD].empty()) { 9883565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCContext &Ctx = Asm.getContext(); 9894283f4b81e8c1cbf5c7a7b51e949e109ae25ff8cRafael Espindola const MCSectionELF *RelaSection; 9903565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming const MCSectionELF &Section = 9913565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming static_cast<const MCSectionELF&>(SD.getSection()); 9923565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 9933565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming const StringRef SectionName = Section.getSectionName(); 994bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola std::string RelaSectionName = hasRelocationAddend() ? ".rela" : ".rel"; 9953565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming RelaSectionName += SectionName; 996299fbe3a5aad8f08c52c488a9b28df70c7595e0dBenjamin Kramer 997299fbe3a5aad8f08c52c488a9b28df70c7595e0dBenjamin Kramer unsigned EntrySize; 998bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola if (hasRelocationAddend()) 999bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola EntrySize = is64Bit() ? sizeof(ELF::Elf64_Rela) : sizeof(ELF::Elf32_Rela); 1000299fbe3a5aad8f08c52c488a9b28df70c7595e0dBenjamin Kramer else 1001bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola EntrySize = is64Bit() ? sizeof(ELF::Elf64_Rel) : sizeof(ELF::Elf32_Rel); 10023565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1003bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola RelaSection = Ctx.getELFSection(RelaSectionName, hasRelocationAddend() ? 1004377a572d9b92304a0fde4371d726721586c1a5bdBenjamin Kramer ELF::SHT_RELA : ELF::SHT_REL, 0, 10053565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming SectionKind::getReadOnly(), 10062ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola EntrySize, ""); 10073565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 10083565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCSectionData &RelaSD = Asm.getOrCreateSectionData(*RelaSection); 1009bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola RelaSD.setAlignment(is64Bit() ? 8 : 4); 10103565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 10113565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCDataFragment *F = new MCDataFragment(&RelaSD); 10123565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 10133565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteRelocationsFragment(Asm, F, &SD); 10143565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 10153565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 10163565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1017115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::WriteSecHdrEntry(uint32_t Name, uint32_t Type, 1018115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint64_t Flags, uint64_t Address, 1019115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint64_t Offset, uint64_t Size, 1020115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint32_t Link, uint32_t Info, 1021115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint64_t Alignment, 1022115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint64_t EntrySize) { 10233565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write32(Name); // sh_name: index into string table 10243565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write32(Type); // sh_type 10253565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteWord(Flags); // sh_flags 10263565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteWord(Address); // sh_addr 10273565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteWord(Offset); // sh_offset 10283565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteWord(Size); // sh_size 10293565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write32(Link); // sh_link 10303565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write32(Info); // sh_info 10313565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteWord(Alignment); // sh_addralign 10323565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteWord(EntrySize); // sh_entsize 10333565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 10343565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1035115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::WriteRelocationsFragment(const MCAssembler &Asm, 1036115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar MCDataFragment *F, 1037115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const MCSectionData *SD) { 10383565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming std::vector<ELFRelocationEntry> &Relocs = Relocations[SD]; 10393565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // sort by the r_offset just like gnu as does 10403565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming array_pod_sort(Relocs.begin(), Relocs.end()); 10413565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 10423565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming for (unsigned i = 0, e = Relocs.size(); i != e; ++i) { 10433565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming ELFRelocationEntry entry = Relocs[e - i - 1]; 10443565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 104512203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola if (!entry.Index) 104612203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola ; 104712203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola else if (entry.Index < 0) 10488f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola entry.Index = getSymbolIndexInSymbolTable(Asm, entry.Symbol); 10498f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola else 105012203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola entry.Index += LocalSymbolData.size(); 1051bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola if (is64Bit()) { 1052af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String64(*F, entry.r_offset); 10535e492e8d42fa1f2940165a937d3d613c61b57708Benjamin Kramer 10548f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola struct ELF::Elf64_Rela ERE64; 10558f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola ERE64.setSymbolAndType(entry.Index, entry.Type); 1056af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String64(*F, ERE64.r_info); 10575e492e8d42fa1f2940165a937d3d613c61b57708Benjamin Kramer 1058bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola if (hasRelocationAddend()) 1059af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String64(*F, entry.r_addend); 10605e492e8d42fa1f2940165a937d3d613c61b57708Benjamin Kramer } else { 1061af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String32(*F, entry.r_offset); 10625e492e8d42fa1f2940165a937d3d613c61b57708Benjamin Kramer 10638f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola struct ELF::Elf32_Rela ERE32; 10648f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola ERE32.setSymbolAndType(entry.Index, entry.Type); 1065af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String32(*F, ERE32.r_info); 10665e492e8d42fa1f2940165a937d3d613c61b57708Benjamin Kramer 1067bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola if (hasRelocationAddend()) 1068af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String32(*F, entry.r_addend); 10695e492e8d42fa1f2940165a937d3d613c61b57708Benjamin Kramer } 10703565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 10713565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 10723565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1073115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::CreateMetadataSections(MCAssembler &Asm, 1074115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar MCAsmLayout &Layout, 10754beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola const SectionIndexMapTy &SectionIndexMap) { 10763565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCContext &Ctx = Asm.getContext(); 10773565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCDataFragment *F; 10783565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1079bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola unsigned EntrySize = is64Bit() ? ELF::SYMENTRY_SIZE64 : ELF::SYMENTRY_SIZE32; 10803565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 108138738bf1a847292003a5495f17e42a75d1274bf7Rafael Espindola // We construct .shstrtab, .symtab and .strtab in this order to match gnu as. 10824283f4b81e8c1cbf5c7a7b51e949e109ae25ff8cRafael Espindola const MCSectionELF *ShstrtabSection = 10837be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola Ctx.getELFSection(".shstrtab", ELF::SHT_STRTAB, 0, 10843f2d13c98eb04962bf6fcfdcc6f62789bc820d79Rafael Espindola SectionKind::getReadOnly()); 108571859c640f6a36251aca223fd503c58dc314e296Rafael Espindola MCSectionData &ShstrtabSD = Asm.getOrCreateSectionData(*ShstrtabSection); 108671859c640f6a36251aca223fd503c58dc314e296Rafael Espindola ShstrtabSD.setAlignment(1); 108771859c640f6a36251aca223fd503c58dc314e296Rafael Espindola ShstrtabIndex = Asm.size(); 108871859c640f6a36251aca223fd503c58dc314e296Rafael Espindola 10894283f4b81e8c1cbf5c7a7b51e949e109ae25ff8cRafael Espindola const MCSectionELF *SymtabSection = 10907be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola Ctx.getELFSection(".symtab", ELF::SHT_SYMTAB, 0, 10917be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola SectionKind::getReadOnly(), 10922ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola EntrySize, ""); 10933565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCSectionData &SymtabSD = Asm.getOrCreateSectionData(*SymtabSection); 1094bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola SymtabSD.setAlignment(is64Bit() ? 8 : 4); 10957be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola SymbolTableIndex = Asm.size(); 10967be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola 10977be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola MCSectionData *SymtabShndxSD = NULL; 10987be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola 10997be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola if (NeedsSymtabShndx) { 11004283f4b81e8c1cbf5c7a7b51e949e109ae25ff8cRafael Espindola const MCSectionELF *SymtabShndxSection = 11017be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola Ctx.getELFSection(".symtab_shndx", ELF::SHT_SYMTAB_SHNDX, 0, 11022ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola SectionKind::getReadOnly(), 4, ""); 11037be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola SymtabShndxSD = &Asm.getOrCreateSectionData(*SymtabShndxSection); 11047be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola SymtabShndxSD->setAlignment(4); 11057be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola } 11063565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 11073565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming const MCSection *StrtabSection; 11083565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming StrtabSection = Ctx.getELFSection(".strtab", ELF::SHT_STRTAB, 0, 11093f2d13c98eb04962bf6fcfdcc6f62789bc820d79Rafael Espindola SectionKind::getReadOnly()); 11103565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCSectionData &StrtabSD = Asm.getOrCreateSectionData(*StrtabSection); 11113565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming StrtabSD.setAlignment(1); 11123565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming StringTableIndex = Asm.size(); 11133565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1114c3c413f63117896f186fc4385bdaac0578d3613fRafael Espindola WriteRelocations(Asm, Layout); 111571859c640f6a36251aca223fd503c58dc314e296Rafael Espindola 111671859c640f6a36251aca223fd503c58dc314e296Rafael Espindola // Symbol table 111771859c640f6a36251aca223fd503c58dc314e296Rafael Espindola F = new MCDataFragment(&SymtabSD); 11187be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola MCDataFragment *ShndxF = NULL; 11197be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola if (NeedsSymtabShndx) { 11207be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola ShndxF = new MCDataFragment(SymtabShndxSD); 11217be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola } 11224beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola WriteSymbolTable(F, ShndxF, Asm, Layout, SectionIndexMap); 112371859c640f6a36251aca223fd503c58dc314e296Rafael Espindola 11243565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming F = new MCDataFragment(&StrtabSD); 11253565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming F->getContents().append(StringTable.begin(), StringTable.end()); 11263565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 11273565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming F = new MCDataFragment(&ShstrtabSD); 11283565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 11293565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Section header string table. 11303565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // 11313565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // The first entry of a string table holds a null character so skip 11323565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // section 0. 11333565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint64_t Index = 1; 11343565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming F->getContents() += '\x00'; 11353565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 11362ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola StringMap<uint64_t> SecStringMap; 11373565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming for (MCAssembler::const_iterator it = Asm.begin(), 11383565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming ie = Asm.end(); it != ie; ++it) { 11393565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming const MCSectionELF &Section = 1140368ae7e4ec0cc0dfc404fa1d07cdf94a7f2a15beBenjamin Kramer static_cast<const MCSectionELF&>(it->getSection()); 114151efe7a253190b672519e8388ce5d45f1dcf1a24Rafael Espindola // FIXME: We could merge suffixes like in .text and .rela.text. 11423565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 11432ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola StringRef Name = Section.getSectionName(); 11442ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola if (SecStringMap.count(Name)) { 11452ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola SectionStringTableIndex[&Section] = SecStringMap[Name]; 11462ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola continue; 11472ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola } 11483565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Remember the index into the string table so we can write it 11493565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // into the sh_name field of the section header table. 11502ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola SectionStringTableIndex[&Section] = Index; 11512ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola SecStringMap[Name] = Index; 11523565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 11532ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola Index += Name.size() + 1; 11542ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola F->getContents() += Name; 11553565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming F->getContents() += '\x00'; 11563565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 11577070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola} 11587070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola 1159fea753b397823c340608925eb7f3256a64a30017Rafael Espindolabool 1160fea753b397823c340608925eb7f3256a64a30017Rafael EspindolaELFObjectWriter::IsSymbolRefDifferenceFullyResolvedImpl(const MCAssembler &Asm, 1161fea753b397823c340608925eb7f3256a64a30017Rafael Espindola const MCSymbolData &DataA, 1162fea753b397823c340608925eb7f3256a64a30017Rafael Espindola const MCFragment &FB, 1163fea753b397823c340608925eb7f3256a64a30017Rafael Espindola bool InSet, 1164fea753b397823c340608925eb7f3256a64a30017Rafael Espindola bool IsPCRel) const { 11652c920850343810535c0cd8720a81eddf7997663aRafael Espindola // FIXME: This is in here just to match gnu as output. If the two ends 11662c920850343810535c0cd8720a81eddf7997663aRafael Espindola // are in the same section, there is nothing that the linker can do to 11672c920850343810535c0cd8720a81eddf7997663aRafael Espindola // break it. 11687070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola if (DataA.isExternal()) 11697070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola return false; 11707070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola 1171fea753b397823c340608925eb7f3256a64a30017Rafael Espindola const MCSection &SecA = DataA.getSymbol().AliasedSymbol().getSection(); 1172fea753b397823c340608925eb7f3256a64a30017Rafael Espindola const MCSection &SecB = FB.getParent()->getSection(); 1173fea753b397823c340608925eb7f3256a64a30017Rafael Espindola // On ELF A - B is absolute if A and B are in the same section. 1174fea753b397823c340608925eb7f3256a64a30017Rafael Espindola return &SecA == &SecB; 11753565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 11763565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1177115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::CreateGroupSections(MCAssembler &Asm, 1178115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar MCAsmLayout &Layout, 11791f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola GroupMapTy &GroupMap, 11801f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola RevGroupMapTy &RevGroupMap) { 11812ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola // Build the groups 11822ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola for (MCAssembler::const_iterator it = Asm.begin(), ie = Asm.end(); 11832ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola it != ie; ++it) { 11842ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSectionELF &Section = 11852ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola static_cast<const MCSectionELF&>(it->getSection()); 11862ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola if (!(Section.getFlags() & MCSectionELF::SHF_GROUP)) 11872ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola continue; 11882ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola 11892ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSymbol *SignatureSymbol = Section.getGroup(); 11902ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola Asm.getOrCreateSymbolData(*SignatureSymbol); 11911f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola const MCSectionELF *&Group = RevGroupMap[SignatureSymbol]; 11922ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola if (!Group) { 11932ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola Group = Asm.getContext().CreateELFGroupSection(); 11942ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola MCSectionData &Data = Asm.getOrCreateSectionData(*Group); 11952ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola Data.setAlignment(4); 11962ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola MCDataFragment *F = new MCDataFragment(&Data); 11972ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola String32(*F, ELF::GRP_COMDAT); 11982ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola } 11992ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola GroupMap[Group] = SignatureSymbol; 12002ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola } 12012ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola 12022ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola // Add sections to the groups 12032ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola unsigned Index = 1; 12041f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola unsigned NumGroups = RevGroupMap.size(); 12052ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola for (MCAssembler::const_iterator it = Asm.begin(), ie = Asm.end(); 12062ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola it != ie; ++it, ++Index) { 12072ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSectionELF &Section = 12082ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola static_cast<const MCSectionELF&>(it->getSection()); 12092ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola if (!(Section.getFlags() & MCSectionELF::SHF_GROUP)) 12102ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola continue; 12111f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola const MCSectionELF *Group = RevGroupMap[Section.getGroup()]; 12122ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola MCSectionData &Data = Asm.getOrCreateSectionData(*Group); 12132ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola // FIXME: we could use the previous fragment 12142ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola MCDataFragment *F = new MCDataFragment(&Data); 12152ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola String32(*F, NumGroups + Index); 12162ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola } 12172ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola} 12182ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola 1219115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::WriteSection(MCAssembler &Asm, 1220115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const SectionIndexMapTy &SectionIndexMap, 1221115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint32_t GroupSymbolIndex, 1222115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint64_t Offset, uint64_t Size, 1223115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint64_t Alignment, 1224115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const MCSectionELF &Section) { 1225c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola uint64_t sh_link = 0; 1226c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola uint64_t sh_info = 0; 1227c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 1228c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola switch(Section.getType()) { 1229c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_DYNAMIC: 1230c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola sh_link = SectionStringTableIndex[&Section]; 1231c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola sh_info = 0; 1232c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola break; 1233c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 1234c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_REL: 1235c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_RELA: { 1236c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola const MCSectionELF *SymtabSection; 1237c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola const MCSectionELF *InfoSection; 1238c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola SymtabSection = Asm.getContext().getELFSection(".symtab", ELF::SHT_SYMTAB, 1239c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 0, 12403f2d13c98eb04962bf6fcfdcc6f62789bc820d79Rafael Espindola SectionKind::getReadOnly()); 1241c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola sh_link = SectionIndexMap.lookup(SymtabSection); 1242c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola assert(sh_link && ".symtab not found"); 1243c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 1244c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola // Remove ".rel" and ".rela" prefixes. 1245c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola unsigned SecNameLen = (Section.getType() == ELF::SHT_REL) ? 4 : 5; 1246c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola StringRef SectionName = Section.getSectionName().substr(SecNameLen); 1247c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 1248c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola InfoSection = Asm.getContext().getELFSection(SectionName, 1249c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola ELF::SHT_PROGBITS, 0, 12503f2d13c98eb04962bf6fcfdcc6f62789bc820d79Rafael Espindola SectionKind::getReadOnly()); 1251c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola sh_info = SectionIndexMap.lookup(InfoSection); 1252c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola break; 1253c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola } 1254c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 1255c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_SYMTAB: 1256c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_DYNSYM: 1257c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola sh_link = StringTableIndex; 1258c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola sh_info = LastLocalSymbolIndex; 1259c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola break; 1260c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 1261c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_SYMTAB_SHNDX: 1262c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola sh_link = SymbolTableIndex; 1263c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola break; 1264c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 1265c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_PROGBITS: 1266c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_STRTAB: 1267c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_NOBITS: 126898976610d2c8067efe04042f17486a4b6c746b31Rafael Espindola case ELF::SHT_NOTE: 1269c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_NULL: 1270c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_ARM_ATTRIBUTES: 127186a97f2e4d0cde5e992f52ac287da0de687e0110Jason W Kim case ELF::SHT_INIT_ARRAY: 127286a97f2e4d0cde5e992f52ac287da0de687e0110Jason W Kim case ELF::SHT_FINI_ARRAY: 127386a97f2e4d0cde5e992f52ac287da0de687e0110Jason W Kim case ELF::SHT_PREINIT_ARRAY: 1274c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola // Nothing to do. 1275c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola break; 1276c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 12772ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola case ELF::SHT_GROUP: { 12782ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola sh_link = SymbolTableIndex; 12792ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola sh_info = GroupSymbolIndex; 12802ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola break; 12812ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola } 12822ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola 1283c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola default: 1284c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola assert(0 && "FIXME: sh_type value not supported!"); 1285c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola break; 1286c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola } 1287c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 1288c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola WriteSecHdrEntry(SectionStringTableIndex[&Section], Section.getType(), 1289c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola Section.getFlags(), 0, Offset, Size, sh_link, sh_info, 1290c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola Alignment, Section.getEntrySize()); 1291c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola} 1292c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 12936db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindolastatic bool IsELFMetaDataSection(const MCSectionData &SD) { 1294f8803fe4177739f9a6900198f601808eb27934d9Rafael Espindola return SD.getOrdinal() == ~UINT32_C(0) && 12956db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola !SD.getSection().isVirtualSection(); 12966db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola} 12976db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola 12986db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindolastatic uint64_t DataSectionSize(const MCSectionData &SD) { 12996db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola uint64_t Ret = 0; 13006db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola for (MCSectionData::const_iterator i = SD.begin(), e = SD.end(); i != e; 13016db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola ++i) { 13026db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola const MCFragment &F = *i; 13036db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola assert(F.getKind() == MCFragment::FT_Data); 13046db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola Ret += cast<MCDataFragment>(F).getContents().size(); 13056db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola } 13066db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola return Ret; 13076db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola} 13086db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola 13096db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindolastatic uint64_t GetSectionFileSize(const MCAsmLayout &Layout, 13106db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola const MCSectionData &SD) { 13116db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola if (IsELFMetaDataSection(SD)) 13126db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola return DataSectionSize(SD); 13136db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola return Layout.getSectionFileSize(&SD); 13146db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola} 13156db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola 131685f2ecc697a8ca6c8cf08093054cbbb9d2060ccfRafael Espindolastatic uint64_t GetSectionAddressSize(const MCAsmLayout &Layout, 131785f2ecc697a8ca6c8cf08093054cbbb9d2060ccfRafael Espindola const MCSectionData &SD) { 13186db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola if (IsELFMetaDataSection(SD)) 13196db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola return DataSectionSize(SD); 132085f2ecc697a8ca6c8cf08093054cbbb9d2060ccfRafael Espindola return Layout.getSectionAddressSize(&SD); 13216db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola} 13226db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola 13236db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindolastatic void WriteDataSectionData(ELFObjectWriter *W, const MCSectionData &SD) { 13246db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola for (MCSectionData::const_iterator i = SD.begin(), e = SD.end(); i != e; 13256db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola ++i) { 13266db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola const MCFragment &F = *i; 13276db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola assert(F.getKind() == MCFragment::FT_Data); 13286db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola W->WriteBytes(cast<MCDataFragment>(F).getContents().str()); 13296db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola } 13306db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola} 13316db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola 1332115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::WriteObject(MCAssembler &Asm, 1333115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const MCAsmLayout &Layout) { 13342ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola GroupMapTy GroupMap; 13351f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola RevGroupMapTy RevGroupMap; 13361f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola CreateGroupSections(Asm, const_cast<MCAsmLayout&>(Layout), GroupMap, 13371f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola RevGroupMap); 13382ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola 1339bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola SectionIndexMapTy SectionIndexMap; 1340bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola 1341bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola ComputeIndexMap(Asm, SectionIndexMap); 1342bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola 13438f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola // Compute symbol table information. 13441f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola ComputeSymbolTable(Asm, SectionIndexMap, RevGroupMap); 13458f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola 13463565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming CreateMetadataSections(const_cast<MCAssembler&>(Asm), 13474beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola const_cast<MCAsmLayout&>(Layout), 13484beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola SectionIndexMap); 13493565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 13501d739a010d49914eae7b6c415dd6de76ca142030Rafael Espindola // Update to include the metadata sections. 13511d739a010d49914eae7b6c415dd6de76ca142030Rafael Espindola ComputeIndexMap(Asm, SectionIndexMap); 13521d739a010d49914eae7b6c415dd6de76ca142030Rafael Espindola 13533565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Add 1 for the null section. 13543565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming unsigned NumSections = Asm.size() + 1; 1355bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola uint64_t NaturalAlignment = is64Bit() ? 8 : 4; 1356bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola uint64_t HeaderSize = is64Bit() ? sizeof(ELF::Elf64_Ehdr) : 1357bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola sizeof(ELF::Elf32_Ehdr); 1358a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer uint64_t FileOff = HeaderSize; 13593565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 13602ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola std::vector<const MCSectionELF*> Sections; 13612ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola Sections.resize(NumSections); 13622ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola 13632ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola for (SectionIndexMapTy::const_iterator i= 13642ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola SectionIndexMap.begin(), e = SectionIndexMap.end(); i != e; ++i) { 13652ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const std::pair<const MCSectionELF*, uint32_t> &p = *i; 13662ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola Sections[p.second] = p.first; 13672ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola } 13682ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola 13692ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola for (unsigned i = 1; i < NumSections; ++i) { 13702ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSectionELF &Section = *Sections[i]; 13712ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSectionData &SD = Asm.getOrCreateSectionData(Section); 13723565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1373a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer FileOff = RoundUpToAlignment(FileOff, SD.getAlignment()); 1374a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer 13753565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Get the size of the section in the output file (including padding). 13766db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola FileOff += GetSectionFileSize(Layout, SD); 13773565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 13783565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1379a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer FileOff = RoundUpToAlignment(FileOff, NaturalAlignment); 1380a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer 13813565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Write out the ELF header ... 1382a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer WriteHeader(FileOff - HeaderSize, NumSections); 1383a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer 1384a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer FileOff = HeaderSize; 13853565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 13863565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // ... then all of the sections ... 13873565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming DenseMap<const MCSection*, uint64_t> SectionOffsetMap; 13883565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 13892ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola for (unsigned i = 1; i < NumSections; ++i) { 13902ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSectionELF &Section = *Sections[i]; 13912ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSectionData &SD = Asm.getOrCreateSectionData(Section); 1392a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer 1393a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer uint64_t Padding = OffsetToAlignment(FileOff, SD.getAlignment()); 1394a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer WriteZeros(Padding); 1395a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer FileOff += Padding; 1396a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer 13973565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Remember the offset into the file for this section. 13982ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola SectionOffsetMap[&Section] = FileOff; 139944cbde85badb60c7078e37e14575c15e671521b1Benjamin Kramer 14006db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola FileOff += GetSectionFileSize(Layout, SD); 14013565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 14026db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola if (IsELFMetaDataSection(SD)) 14036db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola WriteDataSectionData(this, SD); 14046db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola else 14055d2477cecf53bef911f57423a5cecb743d4286faDaniel Dunbar Asm.WriteSectionData(&SD, Layout); 14063565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 14073565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1408a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer uint64_t Padding = OffsetToAlignment(FileOff, NaturalAlignment); 1409a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer WriteZeros(Padding); 1410a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer FileOff += Padding; 1411a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer 14123565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // ... and then the section header table. 14133565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Should we align the section header table? 14143565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // 14153565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Null section first. 14167be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola uint64_t FirstSectionSize = 14177be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola NumSections >= ELF::SHN_LORESERVE ? NumSections : 0; 14187be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola uint32_t FirstSectionLink = 14197be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola ShstrtabIndex >= ELF::SHN_LORESERVE ? ShstrtabIndex : 0; 14207be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola WriteSecHdrEntry(0, 0, 0, 0, 0, FirstSectionSize, FirstSectionLink, 0, 0, 0); 14213565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 14222ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola for (unsigned i = 1; i < NumSections; ++i) { 14232ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSectionELF &Section = *Sections[i]; 14242ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSectionData &SD = Asm.getOrCreateSectionData(Section); 14252ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola uint32_t GroupSymbolIndex; 14262ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola if (Section.getType() != ELF::SHT_GROUP) 14272ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola GroupSymbolIndex = 0; 14282ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola else 14292ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola GroupSymbolIndex = getSymbolIndexInSymbolTable(Asm, GroupMap[&Section]); 14303565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 143185f2ecc697a8ca6c8cf08093054cbbb9d2060ccfRafael Espindola uint64_t Size = GetSectionAddressSize(Layout, SD); 14326db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola 14332ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola WriteSection(Asm, SectionIndexMap, GroupSymbolIndex, 14346db8a9f3fabefeb00163295f0611d09134651f3fRafael Espindola SectionOffsetMap[&Section], Size, 1435c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola SD.getAlignment(), Section); 14363565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 14373565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 14383565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 14396024c97ffa15766bc0f200ffd309d9e017ae0d4bRafael EspindolaMCObjectWriter *llvm::createELFObjectWriter(MCELFObjectTargetWriter *MOTW, 14406024c97ffa15766bc0f200ffd309d9e017ae0d4bRafael Espindola raw_ostream &OS, 1441bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola bool IsLittleEndian) { 1442bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola switch (MOTW->getEMachine()) { 1443d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case ELF::EM_386: 1444d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case ELF::EM_X86_64: 1445bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola return new X86ELFObjectWriter(MOTW, OS, IsLittleEndian); break; 1446d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case ELF::EM_ARM: 1447bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola return new ARMELFObjectWriter(MOTW, OS, IsLittleEndian); break; 14484b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck case ELF::EM_MBLAZE: 1449bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola return new MBlazeELFObjectWriter(MOTW, OS, IsLittleEndian); break; 14503285877131ed40d7fe75babf4ee3f4e0d287e4a4Benjamin Kramer default: llvm_unreachable("Unsupported architecture"); break; 1451d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1452d3443e99e43945fdb0742177da06a32fa225740dJason W Kim} 1453d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1454d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1455d3443e99e43945fdb0742177da06a32fa225740dJason W Kim/// START OF SUBCLASSES for ELFObjectWriter 1456d3443e99e43945fdb0742177da06a32fa225740dJason W Kim//===- ARMELFObjectWriter -------------------------------------------===// 1457d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 145831f3578b00a2ea85fb730b690f0478529103c748Rafael EspindolaARMELFObjectWriter::ARMELFObjectWriter(MCELFObjectTargetWriter *MOTW, 1459bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola raw_ostream &_OS, 1460bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola bool IsLittleEndian) 1461bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola : ELFObjectWriter(MOTW, _OS, IsLittleEndian) 1462d3443e99e43945fdb0742177da06a32fa225740dJason W Kim{} 1463d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1464d3443e99e43945fdb0742177da06a32fa225740dJason W KimARMELFObjectWriter::~ARMELFObjectWriter() 1465d3443e99e43945fdb0742177da06a32fa225740dJason W Kim{} 1466d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 146785fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kimunsigned ARMELFObjectWriter::GetRelocType(const MCValue &Target, 146885fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim const MCFixup &Fixup, 146956a399023aba6cf1348533df04732950c43eaca7Jason W Kim bool IsPCRel, 147056a399023aba6cf1348533df04732950c43eaca7Jason W Kim bool IsRelocWithSymbol, 147156a399023aba6cf1348533df04732950c43eaca7Jason W Kim int64_t Addend) { 147285fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim MCSymbolRefExpr::VariantKind Modifier = Target.isAbsolute() ? 147385fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim MCSymbolRefExpr::VK_None : Target.getSymA()->getKind(); 147485fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim 1475a0871e79270b2a05f93c9df73bbe24c587faa94eJason W Kim unsigned Type = 0; 147685fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim if (IsPCRel) { 147785fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim switch ((unsigned)Fixup.getKind()) { 147885fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim default: assert(0 && "Unimplemented"); 14793fa4c1dc95098105e73aa7055c27bebbf9112966Jason W Kim case FK_Data_4: 14803fa4c1dc95098105e73aa7055c27bebbf9112966Jason W Kim switch (Modifier) { 14813fa4c1dc95098105e73aa7055c27bebbf9112966Jason W Kim default: llvm_unreachable("Unsupported Modifier"); 14823fa4c1dc95098105e73aa7055c27bebbf9112966Jason W Kim case MCSymbolRefExpr::VK_None: 14831d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim Type = ELF::R_ARM_BASE_PREL; 14841d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim break; 14853fa4c1dc95098105e73aa7055c27bebbf9112966Jason W Kim case MCSymbolRefExpr::VK_ARM_TLSGD: 14861d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim assert(0 && "unimplemented"); 14871d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim break; 14883fa4c1dc95098105e73aa7055c27bebbf9112966Jason W Kim case MCSymbolRefExpr::VK_ARM_GOTTPOFF: 14893fa4c1dc95098105e73aa7055c27bebbf9112966Jason W Kim Type = ELF::R_ARM_TLS_IE32; 14901d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim break; 14911d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim } 14921d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim break; 14933fa4c1dc95098105e73aa7055c27bebbf9112966Jason W Kim case ARM::fixup_arm_branch: 14943fa4c1dc95098105e73aa7055c27bebbf9112966Jason W Kim switch (Modifier) { 14953fa4c1dc95098105e73aa7055c27bebbf9112966Jason W Kim case MCSymbolRefExpr::VK_ARM_PLT: 14961d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim Type = ELF::R_ARM_PLT32; 14971d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim break; 14983fa4c1dc95098105e73aa7055c27bebbf9112966Jason W Kim default: 14991d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim Type = ELF::R_ARM_CALL; 15001d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim break; 15011d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim } 15021d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim break; 150386a97f2e4d0cde5e992f52ac287da0de687e0110Jason W Kim case ARM::fixup_arm_movt_hi16: 150486a97f2e4d0cde5e992f52ac287da0de687e0110Jason W Kim case ARM::fixup_arm_movt_hi16_pcrel: 15051d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim Type = ELF::R_ARM_MOVT_PREL; 15061d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim break; 150786a97f2e4d0cde5e992f52ac287da0de687e0110Jason W Kim case ARM::fixup_arm_movw_lo16: 150886a97f2e4d0cde5e992f52ac287da0de687e0110Jason W Kim case ARM::fixup_arm_movw_lo16_pcrel: 15091d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim Type = ELF::R_ARM_MOVW_PREL_NC; 15101d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim break; 1511f3eb3bba1614a7935b44fc963a805088d71267f3Evan Cheng case ARM::fixup_t2_movt_hi16: 1512f3eb3bba1614a7935b44fc963a805088d71267f3Evan Cheng case ARM::fixup_t2_movt_hi16_pcrel: 1513f3eb3bba1614a7935b44fc963a805088d71267f3Evan Cheng Type = ELF::R_ARM_THM_MOVT_PREL; 1514f3eb3bba1614a7935b44fc963a805088d71267f3Evan Cheng break; 1515f3eb3bba1614a7935b44fc963a805088d71267f3Evan Cheng case ARM::fixup_t2_movw_lo16: 1516f3eb3bba1614a7935b44fc963a805088d71267f3Evan Cheng case ARM::fixup_t2_movw_lo16_pcrel: 1517f3eb3bba1614a7935b44fc963a805088d71267f3Evan Cheng Type = ELF::R_ARM_THM_MOVW_PREL_NC; 1518f3eb3bba1614a7935b44fc963a805088d71267f3Evan Cheng break; 151985fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim } 152085fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim } else { 152185fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim switch ((unsigned)Fixup.getKind()) { 152285fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim default: llvm_unreachable("invalid fixup kind!"); 1523a0871e79270b2a05f93c9df73bbe24c587faa94eJason W Kim case FK_Data_4: 1524a0871e79270b2a05f93c9df73bbe24c587faa94eJason W Kim switch (Modifier) { 15253fa4c1dc95098105e73aa7055c27bebbf9112966Jason W Kim default: llvm_unreachable("Unsupported Modifier"); break; 15263fa4c1dc95098105e73aa7055c27bebbf9112966Jason W Kim case MCSymbolRefExpr::VK_ARM_GOT: 15271d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim Type = ELF::R_ARM_GOT_BREL; 15281d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim break; 15293fa4c1dc95098105e73aa7055c27bebbf9112966Jason W Kim case MCSymbolRefExpr::VK_ARM_TLSGD: 15301d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim Type = ELF::R_ARM_TLS_GD32; 15311d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim break; 1532f13743bb3c3fb37a59b59f26056bc391bf0adcdcJason W Kim case MCSymbolRefExpr::VK_ARM_TPOFF: 15331d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim Type = ELF::R_ARM_TLS_LE32; 15341d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim break; 1535a0871e79270b2a05f93c9df73bbe24c587faa94eJason W Kim case MCSymbolRefExpr::VK_ARM_GOTTPOFF: 15361d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim Type = ELF::R_ARM_TLS_IE32; 15371d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim break; 1538f13743bb3c3fb37a59b59f26056bc391bf0adcdcJason W Kim case MCSymbolRefExpr::VK_None: 15391d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim Type = ELF::R_ARM_ABS32; 15401d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim break; 15413fa4c1dc95098105e73aa7055c27bebbf9112966Jason W Kim case MCSymbolRefExpr::VK_ARM_GOTOFF: 15421d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim Type = ELF::R_ARM_GOTOFF32; 15431d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim break; 15441d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim } 15451d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim break; 1546dff84b03258514463ede477af38f1246b95b0cd0Jim Grosbach case ARM::fixup_arm_ldst_pcrel_12: 15479d63d90de5e57ad96f467b270544443a9284eb2bOwen Anderson case ARM::fixup_arm_pcrel_10: 1548dff84b03258514463ede477af38f1246b95b0cd0Jim Grosbach case ARM::fixup_arm_adr_pcrel_12: 1549662a816e89a9d77bf75e1328b09cf9235b4682aaJim Grosbach case ARM::fixup_arm_thumb_bl: 1550b492a7c2134d3886f545f1b5ea55115d71529a10Jim Grosbach case ARM::fixup_arm_thumb_cb: 1551b8958b031ec5163261f490f131780c5dc3d823d6Bill Wendling case ARM::fixup_arm_thumb_cp: 1552e246717c3a36a913fd4200776ed621649bb2b624Jim Grosbach case ARM::fixup_arm_thumb_br: 15531d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim assert(0 && "Unimplemented"); 15541d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim break; 155585fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim case ARM::fixup_arm_branch: 1556f13743bb3c3fb37a59b59f26056bc391bf0adcdcJason W Kim // FIXME: Differentiate between R_ARM_CALL and 1557f13743bb3c3fb37a59b59f26056bc391bf0adcdcJason W Kim // R_ARM_JUMP24 (latter used for conditional jumps) 15581d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim Type = ELF::R_ARM_CALL; 15591d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim break; 15601d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim case ARM::fixup_arm_movt_hi16: 15611d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim Type = ELF::R_ARM_MOVT_ABS; 15621d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim break; 156385fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim case ARM::fixup_arm_movw_lo16: 15641d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim Type = ELF::R_ARM_MOVW_ABS_NC; 15651d8661744b3ad300ee483cf83be179e93cbd1245Jason W Kim break; 1566f3eb3bba1614a7935b44fc963a805088d71267f3Evan Cheng case ARM::fixup_t2_movt_hi16: 1567f3eb3bba1614a7935b44fc963a805088d71267f3Evan Cheng Type = ELF::R_ARM_THM_MOVT_ABS; 1568f3eb3bba1614a7935b44fc963a805088d71267f3Evan Cheng break; 1569f3eb3bba1614a7935b44fc963a805088d71267f3Evan Cheng case ARM::fixup_t2_movw_lo16: 1570f3eb3bba1614a7935b44fc963a805088d71267f3Evan Cheng Type = ELF::R_ARM_THM_MOVW_ABS_NC; 1571f3eb3bba1614a7935b44fc963a805088d71267f3Evan Cheng break; 157285fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim } 157385fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim } 157485fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim 157585fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim if (RelocNeedsGOT(Modifier)) 157685fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim NeedsGOT = true; 1577a0871e79270b2a05f93c9df73bbe24c587faa94eJason W Kim 1578a0871e79270b2a05f93c9df73bbe24c587faa94eJason W Kim return Type; 157985fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim} 158085fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim 15814b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck//===- MBlazeELFObjectWriter -------------------------------------------===// 1582d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 158331f3578b00a2ea85fb730b690f0478529103c748Rafael EspindolaMBlazeELFObjectWriter::MBlazeELFObjectWriter(MCELFObjectTargetWriter *MOTW, 1584bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola raw_ostream &_OS, 1585bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola bool IsLittleEndian) 1586bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola : ELFObjectWriter(MOTW, _OS, IsLittleEndian) { 15874b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck} 15884b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 15894b04713423c6da988db75c7546baa3db7ddfa119Wesley PeckMBlazeELFObjectWriter::~MBlazeELFObjectWriter() { 15904b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck} 15914b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 159256a399023aba6cf1348533df04732950c43eaca7Jason W Kimunsigned MBlazeELFObjectWriter::GetRelocType(const MCValue &Target, 15934b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck const MCFixup &Fixup, 159456a399023aba6cf1348533df04732950c43eaca7Jason W Kim bool IsPCRel, 159556a399023aba6cf1348533df04732950c43eaca7Jason W Kim bool IsRelocWithSymbol, 159656a399023aba6cf1348533df04732950c43eaca7Jason W Kim int64_t Addend) { 15974b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck // determine the type of the relocation 15984b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck unsigned Type; 15994b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck if (IsPCRel) { 16004b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck switch ((unsigned)Fixup.getKind()) { 16014b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck default: 16024b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck llvm_unreachable("Unimplemented"); 1603e04ed7e45f194f14a7b28bbf3f55694d8e2bcf80Rafael Espindola case FK_PCRel_4: 16044b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck Type = ELF::R_MICROBLAZE_64_PCREL; 16054b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck break; 1606e04ed7e45f194f14a7b28bbf3f55694d8e2bcf80Rafael Espindola case FK_PCRel_2: 16074b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck Type = ELF::R_MICROBLAZE_32_PCREL; 16084b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck break; 16094b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck } 16104b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck } else { 16114b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck switch ((unsigned)Fixup.getKind()) { 16124b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck default: llvm_unreachable("invalid fixup kind!"); 16134b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck case FK_Data_4: 161456a399023aba6cf1348533df04732950c43eaca7Jason W Kim Type = ((IsRelocWithSymbol || Addend !=0) 161556a399023aba6cf1348533df04732950c43eaca7Jason W Kim ? ELF::R_MICROBLAZE_32 161656a399023aba6cf1348533df04732950c43eaca7Jason W Kim : ELF::R_MICROBLAZE_64); 16174b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck break; 16184b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck case FK_Data_2: 16194b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck Type = ELF::R_MICROBLAZE_32; 16204b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck break; 16214b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck } 16224b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck } 162356a399023aba6cf1348533df04732950c43eaca7Jason W Kim return Type; 16244b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck} 1625d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1626d3443e99e43945fdb0742177da06a32fa225740dJason W Kim//===- X86ELFObjectWriter -------------------------------------------===// 1627d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1628d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 162931f3578b00a2ea85fb730b690f0478529103c748Rafael EspindolaX86ELFObjectWriter::X86ELFObjectWriter(MCELFObjectTargetWriter *MOTW, 1630bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola raw_ostream &_OS, 1631bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola bool IsLittleEndian) 1632bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola : ELFObjectWriter(MOTW, _OS, IsLittleEndian) 1633d3443e99e43945fdb0742177da06a32fa225740dJason W Kim{} 1634d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1635d3443e99e43945fdb0742177da06a32fa225740dJason W KimX86ELFObjectWriter::~X86ELFObjectWriter() 1636d3443e99e43945fdb0742177da06a32fa225740dJason W Kim{} 1637d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 163856a399023aba6cf1348533df04732950c43eaca7Jason W Kimunsigned X86ELFObjectWriter::GetRelocType(const MCValue &Target, 163956a399023aba6cf1348533df04732950c43eaca7Jason W Kim const MCFixup &Fixup, 164056a399023aba6cf1348533df04732950c43eaca7Jason W Kim bool IsPCRel, 164156a399023aba6cf1348533df04732950c43eaca7Jason W Kim bool IsRelocWithSymbol, 164256a399023aba6cf1348533df04732950c43eaca7Jason W Kim int64_t Addend) { 1643d3443e99e43945fdb0742177da06a32fa225740dJason W Kim // determine the type of the relocation 1644d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 164512203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola MCSymbolRefExpr::VariantKind Modifier = Target.isAbsolute() ? 164612203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola MCSymbolRefExpr::VK_None : Target.getSymA()->getKind(); 1647d3443e99e43945fdb0742177da06a32fa225740dJason W Kim unsigned Type; 1648bff66a86e6e44dc7424cd2d7719ac80630b3a5f8Rafael Espindola if (is64Bit()) { 1649d3443e99e43945fdb0742177da06a32fa225740dJason W Kim if (IsPCRel) { 16503a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola switch ((unsigned)Fixup.getKind()) { 16513a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola default: llvm_unreachable("invalid fixup kind!"); 16523a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola case FK_PCRel_8: 16533a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola assert(Modifier == MCSymbolRefExpr::VK_None); 16543a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola Type = ELF::R_X86_64_PC64; 1655d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 16567a54997d670d92f7f0ece87911800aa68fcb8c6dRafael Espindola case X86::reloc_signed_4byte: 1657c3a561cb8ed6f04e3cf7b1ff38c9f51a695d196dRafael Espindola case X86::reloc_riprel_4byte_movq_load: 16583a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola case FK_Data_4: // FIXME? 16593a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola case X86::reloc_riprel_4byte: 16603a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola case FK_PCRel_4: 16613a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola switch (Modifier) { 16623a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola default: 16633a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola llvm_unreachable("Unimplemented"); 16643a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola case MCSymbolRefExpr::VK_None: 16653a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola Type = ELF::R_X86_64_PC32; 16663a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola break; 16673a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola case MCSymbolRefExpr::VK_PLT: 16683a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola Type = ELF::R_X86_64_PLT32; 16693a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola break; 16703a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola case MCSymbolRefExpr::VK_GOTPCREL: 16713a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola Type = ELF::R_X86_64_GOTPCREL; 16723a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola break; 16733a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola case MCSymbolRefExpr::VK_GOTTPOFF: 16743a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola Type = ELF::R_X86_64_GOTTPOFF; 1675d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 16763a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola case MCSymbolRefExpr::VK_TLSGD: 16773a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola Type = ELF::R_X86_64_TLSGD; 16783a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola break; 16793a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola case MCSymbolRefExpr::VK_TLSLD: 16803a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola Type = ELF::R_X86_64_TLSLD; 16813a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola break; 16823a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola } 1683d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 16843a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola case FK_PCRel_2: 16853a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola assert(Modifier == MCSymbolRefExpr::VK_None); 16863a83c40ab61d5ca624f2bbadd70237c6adbdb304Rafael Espindola Type = ELF::R_X86_64_PC16; 1687d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1688d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1689d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } else { 1690d3443e99e43945fdb0742177da06a32fa225740dJason W Kim switch ((unsigned)Fixup.getKind()) { 1691d3443e99e43945fdb0742177da06a32fa225740dJason W Kim default: llvm_unreachable("invalid fixup kind!"); 1692d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case FK_Data_8: Type = ELF::R_X86_64_64; break; 1693d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case X86::reloc_signed_4byte: 1694d3443e99e43945fdb0742177da06a32fa225740dJason W Kim assert(isInt<32>(Target.getConstant())); 1695d3443e99e43945fdb0742177da06a32fa225740dJason W Kim switch (Modifier) { 1696d3443e99e43945fdb0742177da06a32fa225740dJason W Kim default: 1697d3443e99e43945fdb0742177da06a32fa225740dJason W Kim llvm_unreachable("Unimplemented"); 1698d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_None: 1699d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_X86_64_32S; 1700d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1701d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_GOT: 1702d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_X86_64_GOT32; 1703d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1704d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_GOTPCREL: 1705d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_X86_64_GOTPCREL; 1706d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1707d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_TPOFF: 1708d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_X86_64_TPOFF32; 1709d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1710d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_DTPOFF: 1711d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_X86_64_DTPOFF32; 1712d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1713d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1714d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1715d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case FK_Data_4: 1716d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_X86_64_32; 1717d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1718d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case FK_Data_2: Type = ELF::R_X86_64_16; break; 1719e04ed7e45f194f14a7b28bbf3f55694d8e2bcf80Rafael Espindola case FK_PCRel_1: 1720d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case FK_Data_1: Type = ELF::R_X86_64_8; break; 1721d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1722d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1723d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } else { 1724d3443e99e43945fdb0742177da06a32fa225740dJason W Kim if (IsPCRel) { 1725d3443e99e43945fdb0742177da06a32fa225740dJason W Kim switch (Modifier) { 1726d3443e99e43945fdb0742177da06a32fa225740dJason W Kim default: 1727d3443e99e43945fdb0742177da06a32fa225740dJason W Kim llvm_unreachable("Unimplemented"); 1728d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_None: 1729d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_PC32; 1730d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1731d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_PLT: 1732d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_PLT32; 1733d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1734d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1735d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } else { 1736d3443e99e43945fdb0742177da06a32fa225740dJason W Kim switch ((unsigned)Fixup.getKind()) { 1737d3443e99e43945fdb0742177da06a32fa225740dJason W Kim default: llvm_unreachable("invalid fixup kind!"); 1738d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1739d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case X86::reloc_global_offset_table: 1740d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_GOTPC; 1741d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1742d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1743d3443e99e43945fdb0742177da06a32fa225740dJason W Kim // FIXME: Should we avoid selecting reloc_signed_4byte in 32 bit mode 1744d3443e99e43945fdb0742177da06a32fa225740dJason W Kim // instead? 1745d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case X86::reloc_signed_4byte: 1746e04ed7e45f194f14a7b28bbf3f55694d8e2bcf80Rafael Espindola case FK_PCRel_4: 1747d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case FK_Data_4: 1748d3443e99e43945fdb0742177da06a32fa225740dJason W Kim switch (Modifier) { 1749d3443e99e43945fdb0742177da06a32fa225740dJason W Kim default: 1750d3443e99e43945fdb0742177da06a32fa225740dJason W Kim llvm_unreachable("Unimplemented"); 1751d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_None: 1752d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_32; 1753d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1754d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_GOT: 1755d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_GOT32; 1756d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1757d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_GOTOFF: 1758d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_GOTOFF; 1759d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1760d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_TLSGD: 1761d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_TLS_GD; 1762d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1763d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_TPOFF: 1764d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_TLS_LE_32; 1765d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1766d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_INDNTPOFF: 1767d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_TLS_IE; 1768d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1769d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_NTPOFF: 1770d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_TLS_LE; 1771d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1772d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_GOTNTPOFF: 1773d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_TLS_GOTIE; 1774d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1775d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_TLSLDM: 1776d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_TLS_LDM; 1777d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1778d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_DTPOFF: 1779d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_TLS_LDO_32; 1780d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1781d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1782d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1783d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case FK_Data_2: Type = ELF::R_386_16; break; 1784e04ed7e45f194f14a7b28bbf3f55694d8e2bcf80Rafael Espindola case FK_PCRel_1: 1785d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case FK_Data_1: Type = ELF::R_386_8; break; 1786d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1787d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1788d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1789d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1790d3443e99e43945fdb0742177da06a32fa225740dJason W Kim if (RelocNeedsGOT(Modifier)) 1791d3443e99e43945fdb0742177da06a32fa225740dJason W Kim NeedsGOT = true; 1792d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 179356a399023aba6cf1348533df04732950c43eaca7Jason W Kim return Type; 17943565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 1795