ELFObjectWriter.cpp revision 25958730dffe0a16f9c251a1fa317799b8419a1f
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 148f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola#include "llvm/ADT/SmallPtrSet.h" 153565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/ADT/STLExtras.h" 163565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/ADT/StringMap.h" 173565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/ADT/Twine.h" 183565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/MC/MCAssembler.h" 193565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/MC/MCAsmLayout.h" 203565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/MC/MCContext.h" 213565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/MC/MCELFSymbolFlags.h" 223565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/MC/MCExpr.h" 233565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/MC/MCObjectWriter.h" 243565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/MC/MCSectionELF.h" 253565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/MC/MCSymbol.h" 263565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/MC/MCValue.h" 273565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/Support/Debug.h" 283565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/Support/ErrorHandling.h" 293565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/Support/ELF.h" 303565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "llvm/Target/TargetAsmBackend.h" 313565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 323565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include "../Target/X86/X86FixupKinds.h" 334a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim#include "../Target/ARM/ARMFixupKinds.h" 344b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck#include "../Target/MBlaze/MBlazeFixupKinds.h" 353565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 363565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include <vector> 373565a06ebf44a193a8b333cbeff2ee154298d450Matt Flemingusing namespace llvm; 383565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 39ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindolastatic unsigned GetType(const MCSymbolData &SD) { 40ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola uint32_t Type = (SD.getFlags() & (0xf << ELF_STT_Shift)) >> ELF_STT_Shift; 41ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola assert(Type == ELF::STT_NOTYPE || Type == ELF::STT_OBJECT || 42ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola Type == ELF::STT_FUNC || Type == ELF::STT_SECTION || 43ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola Type == ELF::STT_FILE || Type == ELF::STT_COMMON || 44ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola Type == ELF::STT_TLS); 45ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola return Type; 46ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola} 47ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola 48e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindolastatic unsigned GetBinding(const MCSymbolData &SD) { 49e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola uint32_t Binding = (SD.getFlags() & (0xf << ELF_STB_Shift)) >> ELF_STB_Shift; 50e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola assert(Binding == ELF::STB_LOCAL || Binding == ELF::STB_GLOBAL || 51e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola Binding == ELF::STB_WEAK); 52e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola return Binding; 53e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola} 54e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola 55e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindolastatic void SetBinding(MCSymbolData &SD, unsigned Binding) { 56e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola assert(Binding == ELF::STB_LOCAL || Binding == ELF::STB_GLOBAL || 57e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola Binding == ELF::STB_WEAK); 58e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola uint32_t OtherFlags = SD.getFlags() & ~(0xf << ELF_STB_Shift); 59e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola SD.setFlags(OtherFlags | (Binding << ELF_STB_Shift)); 60e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola} 61e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola 62152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindolastatic unsigned GetVisibility(MCSymbolData &SD) { 63152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola unsigned Visibility = 64152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola (SD.getFlags() & (0xf << ELF_STV_Shift)) >> ELF_STV_Shift; 65152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola assert(Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_INTERNAL || 66152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola Visibility == ELF::STV_HIDDEN || Visibility == ELF::STV_PROTECTED); 67152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola return Visibility; 68152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola} 69152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola 704b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 71a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindolastatic bool RelocNeedsGOT(MCSymbolRefExpr::VariantKind Variant) { 72a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindola switch (Variant) { 735c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola default: 745c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola return false; 75a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindola case MCSymbolRefExpr::VK_GOT: 76a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindola case MCSymbolRefExpr::VK_PLT: 77a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindola case MCSymbolRefExpr::VK_GOTPCREL: 78a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindola case MCSymbolRefExpr::VK_TPOFF: 79a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindola case MCSymbolRefExpr::VK_TLSGD: 80a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindola case MCSymbolRefExpr::VK_GOTTPOFF: 81a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindola case MCSymbolRefExpr::VK_INDNTPOFF: 82a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindola case MCSymbolRefExpr::VK_NTPOFF: 83a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindola case MCSymbolRefExpr::VK_GOTNTPOFF: 84a264f72d3fb9dec1427480fcf17ef3c746ea723aRafael Espindola case MCSymbolRefExpr::VK_TLSLDM: 850cf15d61b7e3bf53f5a99f58ada37b93bc039559Rafael Espindola case MCSymbolRefExpr::VK_DTPOFF: 86b4d1721eff7b43577e5f2e53f885973fb6c43683Rafael Espindola case MCSymbolRefExpr::VK_TLSLD: 875c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola return true; 885c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola } 895c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola} 905c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola 913565a06ebf44a193a8b333cbeff2ee154298d450Matt Flemingnamespace { 92115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar class ELFObjectWriter : public MCObjectWriter { 93d3443e99e43945fdb0742177da06a32fa225740dJason W Kim protected: 94b188a3789e2fc64ec7088a220c4c428c41d86faaChris Lattner /*static bool isFixupKindX86RIPRel(unsigned Kind) { 953565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming return Kind == X86::reloc_riprel_4byte || 963565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Kind == X86::reloc_riprel_4byte_movq_load; 97b188a3789e2fc64ec7088a220c4c428c41d86faaChris Lattner }*/ 983565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 993565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1003565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// ELFSymbolData - Helper struct for containing some precomputed information 1013565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// on symbols. 1023565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming struct ELFSymbolData { 1033565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCSymbolData *SymbolData; 1043565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint64_t StringIndex; 1053565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint32_t SectionIndex; 1063565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1073565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Support lexicographic sorting. 1083565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming bool operator<(const ELFSymbolData &RHS) const { 109ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola if (GetType(*SymbolData) == ELF::STT_FILE) 110ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola return true; 111ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola if (GetType(*RHS.SymbolData) == ELF::STT_FILE) 112ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola return false; 11336c6dc22bcaed92f03f7019a0d1cd47ea69e12daBenjamin Kramer return SymbolData->getSymbol().getName() < 11436c6dc22bcaed92f03f7019a0d1cd47ea69e12daBenjamin Kramer RHS.SymbolData->getSymbol().getName(); 1153565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 1163565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming }; 1173565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1183565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// @name Relocation Data 1193565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// @{ 1203565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1213565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming struct ELFRelocationEntry { 1223565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Make these big enough for both 32-bit and 64-bit 1233565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint64_t r_offset; 1248f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola int Index; 1258f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola unsigned Type; 1268f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola const MCSymbol *Symbol; 1273565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint64_t r_addend; 128858e7506e1fabe563eb4222c80ad0fad01641becJason W Kim 1294a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim ELFRelocationEntry() 1304a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim : r_offset(0), Index(0), Type(0), Symbol(0), r_addend(0) {} 1314a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim 13210907426893019c6b7e59c886e41815d4fe50b19Jason W Kim ELFRelocationEntry(uint64_t RelocOffset, int Idx, 13310907426893019c6b7e59c886e41815d4fe50b19Jason W Kim unsigned RelType, const MCSymbol *Sym, 1344a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim uint64_t Addend) 13510907426893019c6b7e59c886e41815d4fe50b19Jason W Kim : r_offset(RelocOffset), Index(Idx), Type(RelType), 13610907426893019c6b7e59c886e41815d4fe50b19Jason W Kim Symbol(Sym), r_addend(Addend) {} 1373565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1383565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Support lexicographic sorting. 1393565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming bool operator<(const ELFRelocationEntry &RE) const { 1403565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming return RE.r_offset < r_offset; 1413565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 1423565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming }; 1433565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1448f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola SmallPtrSet<const MCSymbol *, 16> UsedInReloc; 145484291c27319668ad99cb87def000254357736fbRafael Espindola SmallPtrSet<const MCSymbol *, 16> WeakrefUsedInReloc; 14688182132470527e27231f09b25a885893e528c66Rafael Espindola DenseMap<const MCSymbol *, const MCSymbol *> Renames; 1478f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola 1483565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming llvm::DenseMap<const MCSectionData*, 1493565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming std::vector<ELFRelocationEntry> > Relocations; 1503565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming DenseMap<const MCSection*, uint64_t> SectionStringTableIndex; 1513565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1523565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// @} 1533565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// @name Symbol Table Data 1543565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// @{ 1553565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1563565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming SmallString<256> StringTable; 1573565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming std::vector<ELFSymbolData> LocalSymbolData; 1583565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming std::vector<ELFSymbolData> ExternalSymbolData; 1593565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming std::vector<ELFSymbolData> UndefinedSymbolData; 1603565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1613565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// @} 1623565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1635c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola bool NeedsGOT; 1645c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola 1657be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola bool NeedsSymtabShndx; 1667be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola 1673565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming unsigned Is64Bit : 1; 1683565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1693565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming bool HasRelocationAddend; 1703565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1715baf79edc067a4b17d024cc10324ac88c17e3e43Roman Divacky Triple::OSType OSType; 1725baf79edc067a4b17d024cc10324ac88c17e3e43Roman Divacky 173eecb858ca86fa949c06f819d6127e2ac68d165c8Wesley Peck uint16_t EMachine; 174eecb858ca86fa949c06f819d6127e2ac68d165c8Wesley Peck 1753565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // This holds the symbol table index of the last local symbol. 1763565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming unsigned LastLocalSymbolIndex; 1773565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // This holds the .strtab section index. 1783565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming unsigned StringTableIndex; 1797be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola // This holds the .symtab section index. 1807be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola unsigned SymbolTableIndex; 1813565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1823565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming unsigned ShstrtabIndex; 1833565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1841f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola 1851f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola const MCSymbol *SymbolToReloc(const MCAssembler &Asm, 1861f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola const MCValue &Target, 1871f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola const MCFragment &F) const; 1881f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola 1893565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming public: 190115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar ELFObjectWriter(raw_ostream &_OS, bool _Is64Bit, bool IsLittleEndian, 191115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint16_t _EMachine, bool _HasRelAddend, 192115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar Triple::OSType _OSType) 193115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar : MCObjectWriter(_OS, IsLittleEndian), 194115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar NeedsGOT(false), NeedsSymtabShndx(false), 1955baf79edc067a4b17d024cc10324ac88c17e3e43Roman Divacky Is64Bit(_Is64Bit), HasRelocationAddend(_HasRelAddend), 196eecb858ca86fa949c06f819d6127e2ac68d165c8Wesley Peck OSType(_OSType), EMachine(_EMachine) { 1973565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 198d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 199d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual ~ELFObjectWriter(); 200d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 2013565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming void WriteWord(uint64_t W) { 202b188a3789e2fc64ec7088a220c4c428c41d86faaChris Lattner if (Is64Bit) 203115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar Write64(W); 204b188a3789e2fc64ec7088a220c4c428c41d86faaChris Lattner else 205115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar Write32(W); 2063565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 2073565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 2083565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming void StringLE16(char *buf, uint16_t Value) { 2093565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming buf[0] = char(Value >> 0); 2103565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming buf[1] = char(Value >> 8); 2113565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 2123565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 2133565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming void StringLE32(char *buf, uint32_t Value) { 21436c6dc22bcaed92f03f7019a0d1cd47ea69e12daBenjamin Kramer StringLE16(buf, uint16_t(Value >> 0)); 215c522f6e70b02d161e4bf37023edb20643ee34acfBenjamin Kramer StringLE16(buf + 2, uint16_t(Value >> 16)); 2163565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 2173565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 2183565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming void StringLE64(char *buf, uint64_t Value) { 21936c6dc22bcaed92f03f7019a0d1cd47ea69e12daBenjamin Kramer StringLE32(buf, uint32_t(Value >> 0)); 220c522f6e70b02d161e4bf37023edb20643ee34acfBenjamin Kramer StringLE32(buf + 4, uint32_t(Value >> 32)); 2213565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 2223565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 2233565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming void StringBE16(char *buf ,uint16_t Value) { 2243565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming buf[0] = char(Value >> 8); 2253565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming buf[1] = char(Value >> 0); 2263565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 2273565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 2283565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming void StringBE32(char *buf, uint32_t Value) { 22936c6dc22bcaed92f03f7019a0d1cd47ea69e12daBenjamin Kramer StringBE16(buf, uint16_t(Value >> 16)); 230c522f6e70b02d161e4bf37023edb20643ee34acfBenjamin Kramer StringBE16(buf + 2, uint16_t(Value >> 0)); 2313565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 2323565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 2333565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming void StringBE64(char *buf, uint64_t Value) { 23436c6dc22bcaed92f03f7019a0d1cd47ea69e12daBenjamin Kramer StringBE32(buf, uint32_t(Value >> 32)); 235c522f6e70b02d161e4bf37023edb20643ee34acfBenjamin Kramer StringBE32(buf + 4, uint32_t(Value >> 0)); 2363565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 2373565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 238af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola void String8(MCDataFragment &F, uint8_t Value) { 239af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola char buf[1]; 240af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola buf[0] = Value; 241af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola F.getContents() += StringRef(buf, 1); 242af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola } 243af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola 244af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola void String16(MCDataFragment &F, uint16_t Value) { 245af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola char buf[2]; 246115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar if (isLittleEndian()) 247f8020a3978b9a56074a3a5f9821c63165e37bff7Eli Friedman StringLE16(buf, Value); 2483565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming else 249f8020a3978b9a56074a3a5f9821c63165e37bff7Eli Friedman StringBE16(buf, Value); 250af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola F.getContents() += StringRef(buf, 2); 2513565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 2523565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 253af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola void String32(MCDataFragment &F, uint32_t Value) { 254af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola char buf[4]; 255115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar if (isLittleEndian()) 256f8020a3978b9a56074a3a5f9821c63165e37bff7Eli Friedman StringLE32(buf, Value); 2573565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming else 258f8020a3978b9a56074a3a5f9821c63165e37bff7Eli Friedman StringBE32(buf, Value); 259af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola F.getContents() += StringRef(buf, 4); 2603565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 2613565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 262af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola void String64(MCDataFragment &F, uint64_t Value) { 263af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola char buf[8]; 264115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar if (isLittleEndian()) 265f8020a3978b9a56074a3a5f9821c63165e37bff7Eli Friedman StringLE64(buf, Value); 2663565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming else 267f8020a3978b9a56074a3a5f9821c63165e37bff7Eli Friedman StringBE64(buf, Value); 268af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola F.getContents() += StringRef(buf, 8); 2693565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 2703565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 271d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void WriteHeader(uint64_t SectionDataSize, unsigned NumberOfSections); 2723565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 273d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void WriteSymbolEntry(MCDataFragment *SymtabF, MCDataFragment *ShndxF, 2747be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola uint64_t name, uint8_t info, 2753565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint64_t value, uint64_t size, 2767be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola uint8_t other, uint32_t shndx, 2777be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola bool Reserved); 2783565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 279d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void WriteSymbol(MCDataFragment *SymtabF, MCDataFragment *ShndxF, 2807be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola ELFSymbolData &MSD, 2813565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming const MCAsmLayout &Layout); 2823565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 283bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola typedef DenseMap<const MCSectionELF*, uint32_t> SectionIndexMapTy; 284d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void WriteSymbolTable(MCDataFragment *SymtabF, MCDataFragment *ShndxF, 2857be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola const MCAssembler &Asm, 28671859c640f6a36251aca223fd503c58dc314e296Rafael Espindola const MCAsmLayout &Layout, 2874beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola const SectionIndexMapTy &SectionIndexMap); 2883565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 289d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void RecordRelocation(const MCAssembler &Asm, const MCAsmLayout &Layout, 2903565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming const MCFragment *Fragment, const MCFixup &Fixup, 291d3443e99e43945fdb0742177da06a32fa225740dJason W Kim MCValue Target, uint64_t &FixedValue) { 292d3443e99e43945fdb0742177da06a32fa225740dJason W Kim assert(0 && "RecordRelocation is not specific enough"); 2933285877131ed40d7fe75babf4ee3f4e0d287e4a4Benjamin Kramer } 2943565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 295d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual uint64_t getSymbolIndexInSymbolTable(const MCAssembler &Asm, 2960b6cbfe04cb36872255aff11a41a2b976ceba462Benjamin Kramer const MCSymbol *S); 2973565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 2981f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola // Map from a group section to the signature symbol 2991f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola typedef DenseMap<const MCSectionELF*, const MCSymbol*> GroupMapTy; 3001f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola // Map from a signature symbol to the group section 3011f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola typedef DenseMap<const MCSymbol*, const MCSectionELF*> RevGroupMapTy; 3021f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola 3033565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// ComputeSymbolTable - Compute the symbol table data 3043565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// 3053565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// \param StringTable [out] - The string table data. 3063565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// \param StringIndexMap [out] - Map from symbol names to offsets in the 3073565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// string table. 308d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void ComputeSymbolTable(MCAssembler &Asm, 3091f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola const SectionIndexMapTy &SectionIndexMap, 3101f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola RevGroupMapTy RevGroupMap); 311bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola 312d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void ComputeIndexMap(MCAssembler &Asm, 313bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola SectionIndexMapTy &SectionIndexMap); 3143565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 315d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void WriteRelocation(MCAssembler &Asm, MCAsmLayout &Layout, 3163565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming const MCSectionData &SD); 3173565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 318d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void WriteRelocations(MCAssembler &Asm, MCAsmLayout &Layout) { 3193565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming for (MCAssembler::const_iterator it = Asm.begin(), 3203565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming ie = Asm.end(); it != ie; ++it) { 3213565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteRelocation(Asm, Layout, *it); 3223565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 3233565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 3243565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 325d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void CreateMetadataSections(MCAssembler &Asm, MCAsmLayout &Layout, 3264beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola const SectionIndexMapTy &SectionIndexMap); 3273565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 328d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void CreateGroupSections(MCAssembler &Asm, MCAsmLayout &Layout, 3291f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola GroupMapTy &GroupMap, RevGroupMapTy &RevGroupMap); 3302ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola 331d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void ExecutePostLayoutBinding(MCAssembler &Asm); 3323565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 333d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void WriteSecHdrEntry(uint32_t Name, uint32_t Type, uint64_t Flags, 3343565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint64_t Address, uint64_t Offset, 3353565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint64_t Size, uint32_t Link, uint32_t Info, 3363565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint64_t Alignment, uint64_t EntrySize); 3373565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 338d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void WriteRelocationsFragment(const MCAssembler &Asm, MCDataFragment *F, 3393565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming const MCSectionData *SD); 3403565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 341d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual bool IsFixupFullyResolved(const MCAssembler &Asm, 3427070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola const MCValue Target, 3437070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola bool IsPCRel, 3447070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola const MCFragment *DF) const; 3457070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola 346d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void WriteObject(MCAssembler &Asm, const MCAsmLayout &Layout); 347d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void WriteSection(MCAssembler &Asm, 348c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola const SectionIndexMapTy &SectionIndexMap, 3492ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola uint32_t GroupSymbolIndex, 350c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola uint64_t Offset, uint64_t Size, uint64_t Alignment, 351c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola const MCSectionELF &Section); 3523565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming }; 3533565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 354d3443e99e43945fdb0742177da06a32fa225740dJason W Kim //===- X86ELFObjectWriter -------------------------------------------===// 355d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 356d3443e99e43945fdb0742177da06a32fa225740dJason W Kim class X86ELFObjectWriter : public ELFObjectWriter { 357d3443e99e43945fdb0742177da06a32fa225740dJason W Kim public: 358d3443e99e43945fdb0742177da06a32fa225740dJason W Kim X86ELFObjectWriter(raw_ostream &_OS, bool _Is64Bit, bool IsLittleEndian, 359d3443e99e43945fdb0742177da06a32fa225740dJason W Kim uint16_t _EMachine, bool _HasRelAddend, 360d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Triple::OSType _OSType); 3614b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 362d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual ~X86ELFObjectWriter(); 363d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void RecordRelocation(const MCAssembler &Asm, 364d3443e99e43945fdb0742177da06a32fa225740dJason W Kim const MCAsmLayout &Layout, 365d3443e99e43945fdb0742177da06a32fa225740dJason W Kim const MCFragment *Fragment, 366d3443e99e43945fdb0742177da06a32fa225740dJason W Kim const MCFixup &Fixup, MCValue Target, 367d3443e99e43945fdb0742177da06a32fa225740dJason W Kim uint64_t &FixedValue); 3684a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim 36928ef0a5719c41ed9654156aa9db7a656d020d7b5Jason W Kim private: 3704a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim static bool isFixupKindPCRel(unsigned Kind) { 3714a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim switch (Kind) { 3724a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim default: 3734a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim return false; 3744a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim case X86::reloc_pcrel_1byte: 3754a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim case X86::reloc_pcrel_4byte: 3764a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim case X86::reloc_riprel_4byte: 3774a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim case X86::reloc_riprel_4byte_movq_load: 3784a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim return true; 3794a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim } 3804a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim } 381d3443e99e43945fdb0742177da06a32fa225740dJason W Kim }; 382d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 383d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 384d3443e99e43945fdb0742177da06a32fa225740dJason W Kim //===- ARMELFObjectWriter -------------------------------------------===// 385d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 386d3443e99e43945fdb0742177da06a32fa225740dJason W Kim class ARMELFObjectWriter : public ELFObjectWriter { 387d3443e99e43945fdb0742177da06a32fa225740dJason W Kim public: 388d3443e99e43945fdb0742177da06a32fa225740dJason W Kim ARMELFObjectWriter(raw_ostream &_OS, bool _Is64Bit, bool IsLittleEndian, 389d3443e99e43945fdb0742177da06a32fa225740dJason W Kim uint16_t _EMachine, bool _HasRelAddend, 390d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Triple::OSType _OSType); 3914b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 392d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual ~ARMELFObjectWriter(); 393d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void RecordRelocation(const MCAssembler &Asm, 394d3443e99e43945fdb0742177da06a32fa225740dJason W Kim const MCAsmLayout &Layout, 395d3443e99e43945fdb0742177da06a32fa225740dJason W Kim const MCFragment *Fragment, 396d3443e99e43945fdb0742177da06a32fa225740dJason W Kim const MCFixup &Fixup, MCValue Target, 397d3443e99e43945fdb0742177da06a32fa225740dJason W Kim uint64_t &FixedValue); 3984a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim 39928ef0a5719c41ed9654156aa9db7a656d020d7b5Jason W Kim private: 4004a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim static bool isFixupKindPCRel(unsigned Kind) { 4014a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim switch (Kind) { 4024a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim default: 4034a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim return false; 404ccbe000e093e53979056ba091291f4427c54bd99Jason W Kim case ARM::fixup_arm_pcrel_12: 405ccbe000e093e53979056ba091291f4427c54bd99Jason W Kim case ARM::fixup_arm_vfp_pcrel_12: 406ccbe000e093e53979056ba091291f4427c54bd99Jason W Kim case ARM::fixup_arm_branch: 4074a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim return true; 4084a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim } 4094a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim } 410d3443e99e43945fdb0742177da06a32fa225740dJason W Kim }; 4114b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 4124b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck //===- MBlazeELFObjectWriter -------------------------------------------===// 4134b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 4144b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck class MBlazeELFObjectWriter : public ELFObjectWriter { 4154b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck public: 4164b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck MBlazeELFObjectWriter(raw_ostream &_OS, bool _Is64Bit, bool IsLittleEndian, 4174b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck uint16_t _EMachine, bool _HasRelAddend, 4184b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck Triple::OSType _OSType); 4194b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 4204b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck virtual ~MBlazeELFObjectWriter(); 4214b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck virtual void RecordRelocation(const MCAssembler &Asm, 4224b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck const MCAsmLayout &Layout, 4234b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck const MCFragment *Fragment, 4244b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck const MCFixup &Fixup, MCValue Target, 4254b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck uint64_t &FixedValue); 4264a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim 42728ef0a5719c41ed9654156aa9db7a656d020d7b5Jason W Kim private: 4284a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim static bool isFixupKindPCRel(unsigned Kind) { 4294a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim switch (Kind) { 4304a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim default: 4314a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim return false; 432ccbe000e093e53979056ba091291f4427c54bd99Jason W Kim case MBlaze::reloc_pcrel_2byte: 433ccbe000e093e53979056ba091291f4427c54bd99Jason W Kim case MBlaze::reloc_pcrel_4byte: 4344a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim return true; 4354a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim } 4364a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim } 4374b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck }; 4383565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 4393565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 440d3443e99e43945fdb0742177da06a32fa225740dJason W KimELFObjectWriter::~ELFObjectWriter() 441d3443e99e43945fdb0742177da06a32fa225740dJason W Kim{} 442d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 4433565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming// Emit the ELF header. 444115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::WriteHeader(uint64_t SectionDataSize, 445115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar unsigned NumberOfSections) { 4463565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // ELF Header 4473565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // ---------- 4483565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // 4493565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Note 4503565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // ---- 4513565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // emitWord method behaves differently for ELF32 and ELF64, writing 4523565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // 4 bytes in the former and 8 in the latter. 4533565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4543565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write8(0x7f); // e_ident[EI_MAG0] 4553565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write8('E'); // e_ident[EI_MAG1] 4563565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write8('L'); // e_ident[EI_MAG2] 4573565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write8('F'); // e_ident[EI_MAG3] 4583565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4593565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write8(Is64Bit ? ELF::ELFCLASS64 : ELF::ELFCLASS32); // e_ident[EI_CLASS] 4603565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4613565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // e_ident[EI_DATA] 462115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar Write8(isLittleEndian() ? ELF::ELFDATA2LSB : ELF::ELFDATA2MSB); 4633565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4643565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write8(ELF::EV_CURRENT); // e_ident[EI_VERSION] 4655baf79edc067a4b17d024cc10324ac88c17e3e43Roman Divacky // e_ident[EI_OSABI] 4665baf79edc067a4b17d024cc10324ac88c17e3e43Roman Divacky switch (OSType) { 4675baf79edc067a4b17d024cc10324ac88c17e3e43Roman Divacky case Triple::FreeBSD: Write8(ELF::ELFOSABI_FREEBSD); break; 4685baf79edc067a4b17d024cc10324ac88c17e3e43Roman Divacky case Triple::Linux: Write8(ELF::ELFOSABI_LINUX); break; 4695baf79edc067a4b17d024cc10324ac88c17e3e43Roman Divacky default: Write8(ELF::ELFOSABI_NONE); break; 4705baf79edc067a4b17d024cc10324ac88c17e3e43Roman Divacky } 4713565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write8(0); // e_ident[EI_ABIVERSION] 4723565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4733565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteZeros(ELF::EI_NIDENT - ELF::EI_PAD); 4743565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4753565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write16(ELF::ET_REL); // e_type 4763565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 477eecb858ca86fa949c06f819d6127e2ac68d165c8Wesley Peck Write16(EMachine); // e_machine = target 4783565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4793565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write32(ELF::EV_CURRENT); // e_version 4803565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteWord(0); // e_entry, no entry point in .o file 4813565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteWord(0); // e_phoff, no program header for .o 482eb97677764beb115c658ac559d3649c6c4068eb9Benjamin Kramer WriteWord(SectionDataSize + (Is64Bit ? sizeof(ELF::Elf64_Ehdr) : 483eb97677764beb115c658ac559d3649c6c4068eb9Benjamin Kramer sizeof(ELF::Elf32_Ehdr))); // e_shoff = sec hdr table off in bytes 4843565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4853565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // FIXME: Make this configurable. 4863565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write32(0); // e_flags = whatever the target wants 4873565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4883565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // e_ehsize = ELF header size 4893565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write16(Is64Bit ? sizeof(ELF::Elf64_Ehdr) : sizeof(ELF::Elf32_Ehdr)); 4903565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4913565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write16(0); // e_phentsize = prog header entry size 4923565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write16(0); // e_phnum = # prog header entries = 0 4933565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4943565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // e_shentsize = Section header entry size 4953565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write16(Is64Bit ? sizeof(ELF::Elf64_Shdr) : sizeof(ELF::Elf32_Shdr)); 4963565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4973565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // e_shnum = # of section header ents 4987be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola if (NumberOfSections >= ELF::SHN_LORESERVE) 4997be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola Write16(0); 5007be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola else 5017be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola Write16(NumberOfSections); 5023565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 5033565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // e_shstrndx = Section # of '.shstrtab' 5047be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola if (NumberOfSections >= ELF::SHN_LORESERVE) 5057be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola Write16(ELF::SHN_XINDEX); 5067be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola else 5077be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola Write16(ShstrtabIndex); 5083565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 5093565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 510115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::WriteSymbolEntry(MCDataFragment *SymtabF, 511115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar MCDataFragment *ShndxF, 512115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint64_t name, 513115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint8_t info, uint64_t value, 514115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint64_t size, uint8_t other, 515115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint32_t shndx, 516115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar bool Reserved) { 5177be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola if (ShndxF) { 5187be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola if (shndx >= ELF::SHN_LORESERVE && !Reserved) 519af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String32(*ShndxF, shndx); 5207be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola else 521af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String32(*ShndxF, 0); 5227be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola } 5237be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola 524af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola uint16_t Index = (shndx >= ELF::SHN_LORESERVE && !Reserved) ? 525af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola uint16_t(ELF::SHN_XINDEX) : shndx; 5263565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 527af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola if (Is64Bit) { 528af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String32(*SymtabF, name); // st_name 529af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String8(*SymtabF, info); // st_info 530af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String8(*SymtabF, other); // st_other 531af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String16(*SymtabF, Index); // st_shndx 532af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String64(*SymtabF, value); // st_value 533af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String64(*SymtabF, size); // st_size 5343565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } else { 535af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String32(*SymtabF, name); // st_name 536af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String32(*SymtabF, value); // st_value 537af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String32(*SymtabF, size); // st_size 538af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String8(*SymtabF, info); // st_info 539af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String8(*SymtabF, other); // st_other 540af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String16(*SymtabF, Index); // st_shndx 5413565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 5423565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 5433565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 5442c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindolastatic uint64_t SymbolValue(MCSymbolData &Data, const MCAsmLayout &Layout) { 5452c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola if (Data.isCommon() && Data.isExternal()) 5462c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola return Data.getCommonAlignment(); 5472c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola 5482c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola const MCSymbol &Symbol = Data.getSymbol(); 5492c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola if (!Symbol.isInSection()) 5502c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola return 0; 5512c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola 5521973d4379250a88938a9358c12d96e96bdc8dedeRafael Espindola if (MCFragment *FF = Data.getFragment()) 5531973d4379250a88938a9358c12d96e96bdc8dedeRafael Espindola return Layout.getSymbolAddress(&Data) - 5541973d4379250a88938a9358c12d96e96bdc8dedeRafael Espindola Layout.getSectionAddress(FF->getParent()); 5552c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola 5562c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola return 0; 5572c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola} 5582c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola 559115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::ExecutePostLayoutBinding(MCAssembler &Asm) { 56088182132470527e27231f09b25a885893e528c66Rafael Espindola // The presence of symbol versions causes undefined symbols and 56188182132470527e27231f09b25a885893e528c66Rafael Espindola // versions declared with @@@ to be renamed. 56288182132470527e27231f09b25a885893e528c66Rafael Espindola 56388182132470527e27231f09b25a885893e528c66Rafael Espindola for (MCAssembler::symbol_iterator it = Asm.symbol_begin(), 56488182132470527e27231f09b25a885893e528c66Rafael Espindola ie = Asm.symbol_end(); it != ie; ++it) { 56588182132470527e27231f09b25a885893e528c66Rafael Espindola const MCSymbol &Alias = it->getSymbol(); 56694ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola const MCSymbol &Symbol = Alias.AliasedSymbol(); 567f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola MCSymbolData &SD = Asm.getSymbolData(Symbol); 568f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola 569f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola // Not an alias. 570f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola if (&Symbol == &Alias) 571f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola continue; 572f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola 57307ee63283cc2b9a4d6c98ecd30d1b721fe3cb29aBenjamin Kramer StringRef AliasName = Alias.getName(); 57488182132470527e27231f09b25a885893e528c66Rafael Espindola size_t Pos = AliasName.find('@'); 57588182132470527e27231f09b25a885893e528c66Rafael Espindola if (Pos == StringRef::npos) 57688182132470527e27231f09b25a885893e528c66Rafael Espindola continue; 57788182132470527e27231f09b25a885893e528c66Rafael Espindola 578f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola // Aliases defined with .symvar copy the binding from the symbol they alias. 579f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola // This is the first place we are able to copy this information. 580f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola it->setExternal(SD.isExternal()); 581f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola SetBinding(*it, GetBinding(SD)); 582f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola 58307ee63283cc2b9a4d6c98ecd30d1b721fe3cb29aBenjamin Kramer StringRef Rest = AliasName.substr(Pos); 58488182132470527e27231f09b25a885893e528c66Rafael Espindola if (!Symbol.isUndefined() && !Rest.startswith("@@@")) 58588182132470527e27231f09b25a885893e528c66Rafael Espindola continue; 58688182132470527e27231f09b25a885893e528c66Rafael Espindola 58783ff4d2b0d6133d48055a27fe25c5d241bca7e9bRafael Espindola // FIXME: produce a better error message. 58883ff4d2b0d6133d48055a27fe25c5d241bca7e9bRafael Espindola if (Symbol.isUndefined() && Rest.startswith("@@") && 58983ff4d2b0d6133d48055a27fe25c5d241bca7e9bRafael Espindola !Rest.startswith("@@@")) 59083ff4d2b0d6133d48055a27fe25c5d241bca7e9bRafael Espindola report_fatal_error("A @@ version cannot be undefined"); 59183ff4d2b0d6133d48055a27fe25c5d241bca7e9bRafael Espindola 59207ee63283cc2b9a4d6c98ecd30d1b721fe3cb29aBenjamin Kramer Renames.insert(std::make_pair(&Symbol, &Alias)); 59388182132470527e27231f09b25a885893e528c66Rafael Espindola } 59488182132470527e27231f09b25a885893e528c66Rafael Espindola} 59588182132470527e27231f09b25a885893e528c66Rafael Espindola 596115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::WriteSymbol(MCDataFragment *SymtabF, 597115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar MCDataFragment *ShndxF, 598115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar ELFSymbolData &MSD, 599115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const MCAsmLayout &Layout) { 600de89b010b0b347cdbd1bc9553a970880a3e721bfRafael Espindola MCSymbolData &OrigData = *MSD.SymbolData; 601de89b010b0b347cdbd1bc9553a970880a3e721bfRafael Espindola MCSymbolData &Data = 60294ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola Layout.getAssembler().getSymbolData(OrigData.getSymbol().AliasedSymbol()); 603152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola 6047be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola bool IsReserved = Data.isCommon() || Data.getSymbol().isAbsolute() || 6057be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola Data.getSymbol().isVariable(); 6067be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola 607152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola uint8_t Binding = GetBinding(OrigData); 608152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola uint8_t Visibility = GetVisibility(OrigData); 609152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola uint8_t Type = GetType(Data); 610152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola 611152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola uint8_t Info = (Binding << ELF_STB_Shift) | (Type << ELF_STT_Shift); 612152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola uint8_t Other = Visibility; 613152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola 6142c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola uint64_t Value = SymbolValue(Data, Layout); 6153565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint64_t Size = 0; 6163565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming const MCExpr *ESize; 6173565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 618f7c10a3cff61c70efe8e405d9bdc5386e8e3fc0aRafael Espindola assert(!(Data.isCommon() && !Data.isExternal())); 619f7c10a3cff61c70efe8e405d9bdc5386e8e3fc0aRafael Espindola 6203565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming ESize = Data.getSize(); 6213565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming if (Data.getSize()) { 6223565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCValue Res; 6233565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming if (ESize->getKind() == MCExpr::Binary) { 6243565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming const MCBinaryExpr *BE = static_cast<const MCBinaryExpr *>(ESize); 6253565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 6263565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming if (BE->EvaluateAsRelocatable(Res, &Layout)) { 62724f1206c7de0f21d309d27737071ad742d5ddf27Benjamin Kramer assert(!Res.getSymA() || !Res.getSymA()->getSymbol().isDefined()); 62824f1206c7de0f21d309d27737071ad742d5ddf27Benjamin Kramer assert(!Res.getSymB() || !Res.getSymB()->getSymbol().isDefined()); 629f230df9af4012f9510de664b6d62b128e26a5861Rafael Espindola Size = Res.getConstant(); 6303565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 6313565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } else if (ESize->getKind() == MCExpr::Constant) { 632368ae7e4ec0cc0dfc404fa1d07cdf94a7f2a15beBenjamin Kramer Size = static_cast<const MCConstantExpr *>(ESize)->getValue(); 6333565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } else { 6343565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming assert(0 && "Unsupported size expression"); 6353565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 6363565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 6373565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 6383565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Write out the symbol table entry 6397be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola WriteSymbolEntry(SymtabF, ShndxF, MSD.StringIndex, Info, Value, 6407be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola Size, Other, MSD.SectionIndex, IsReserved); 6413565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 6423565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 643115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::WriteSymbolTable(MCDataFragment *SymtabF, 644115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar MCDataFragment *ShndxF, 645115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const MCAssembler &Asm, 646115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const MCAsmLayout &Layout, 6474beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola const SectionIndexMapTy &SectionIndexMap) { 6483565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // The string table must be emitted first because we need the index 6493565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // into the string table for all the symbol names. 6503565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming assert(StringTable.size() && "Missing string table"); 6513565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 6523565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // FIXME: Make sure the start of the symbol table is aligned. 6533565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 6543565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // The first entry is the undefined symbol entry. 6557be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola WriteSymbolEntry(SymtabF, ShndxF, 0, 0, 0, 0, 0, 0, false); 6563565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 6573565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Write the symbol table entries. 6583565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming LastLocalSymbolIndex = LocalSymbolData.size() + 1; 6593565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming for (unsigned i = 0, e = LocalSymbolData.size(); i != e; ++i) { 6603565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming ELFSymbolData &MSD = LocalSymbolData[i]; 6617be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola WriteSymbol(SymtabF, ShndxF, MSD, Layout); 6623565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 6633565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 66471859c640f6a36251aca223fd503c58dc314e296Rafael Espindola // Write out a symbol table entry for each regular section. 6654beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola for (MCAssembler::const_iterator i = Asm.begin(), e = Asm.end(); i != e; 6664beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola ++i) { 667a44fa2473a5f2a13730d44e0aea8897b5656b555Eli Friedman const MCSectionELF &Section = 6684beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola static_cast<const MCSectionELF&>(i->getSection()); 6694beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola if (Section.getType() == ELF::SHT_RELA || 6704beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola Section.getType() == ELF::SHT_REL || 6714beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola Section.getType() == ELF::SHT_STRTAB || 6724beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola Section.getType() == ELF::SHT_SYMTAB) 673a44fa2473a5f2a13730d44e0aea8897b5656b555Eli Friedman continue; 6747be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola WriteSymbolEntry(SymtabF, ShndxF, 0, ELF::STT_SECTION, 0, 0, 6754beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola ELF::STV_DEFAULT, SectionIndexMap.lookup(&Section), false); 676a44fa2473a5f2a13730d44e0aea8897b5656b555Eli Friedman LastLocalSymbolIndex++; 677a44fa2473a5f2a13730d44e0aea8897b5656b555Eli Friedman } 6783565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 6793565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming for (unsigned i = 0, e = ExternalSymbolData.size(); i != e; ++i) { 6803565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming ELFSymbolData &MSD = ExternalSymbolData[i]; 6813565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCSymbolData &Data = *MSD.SymbolData; 6823223f19ff0920ffee686faba3bf74babf580e8a5Rafael Espindola assert(((Data.getFlags() & ELF_STB_Global) || 6833223f19ff0920ffee686faba3bf74babf580e8a5Rafael Espindola (Data.getFlags() & ELF_STB_Weak)) && 6843223f19ff0920ffee686faba3bf74babf580e8a5Rafael Espindola "External symbol requires STB_GLOBAL or STB_WEAK flag"); 6857be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola WriteSymbol(SymtabF, ShndxF, MSD, Layout); 686e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola if (GetBinding(Data) == ELF::STB_LOCAL) 6873565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming LastLocalSymbolIndex++; 6883565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 6893565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 6903565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming for (unsigned i = 0, e = UndefinedSymbolData.size(); i != e; ++i) { 6913565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming ELFSymbolData &MSD = UndefinedSymbolData[i]; 6923565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCSymbolData &Data = *MSD.SymbolData; 6937be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola WriteSymbol(SymtabF, ShndxF, MSD, Layout); 694e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola if (GetBinding(Data) == ELF::STB_LOCAL) 6953565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming LastLocalSymbolIndex++; 6963565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 6973565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 6983565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 6991f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindolaconst MCSymbol *ELFObjectWriter::SymbolToReloc(const MCAssembler &Asm, 7001f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola const MCValue &Target, 7011f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola const MCFragment &F) const { 7021f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola const MCSymbol &Symbol = Target.getSymA()->getSymbol(); 70394ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola const MCSymbol &ASymbol = Symbol.AliasedSymbol(); 70494ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola const MCSymbol *Renamed = Renames.lookup(&Symbol); 70594ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola const MCSymbolData &SD = Asm.getSymbolData(Symbol); 70694ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola 70794ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola if (ASymbol.isUndefined()) { 70894ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola if (Renamed) 70994ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola return Renamed; 71094ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola return &ASymbol; 7111f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola } 7121f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola 71394ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola if (SD.isExternal()) { 71494ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola if (Renamed) 71594ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola return Renamed; 71694ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola return &Symbol; 71794ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola } 7187eae36b38b874f417fa191fc1cfec22c100f164dRafael Espindola 7197eae36b38b874f417fa191fc1cfec22c100f164dRafael Espindola const MCSectionELF &Section = 72094ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola static_cast<const MCSectionELF&>(ASymbol.getSection()); 72125958730dffe0a16f9c251a1fa317799b8419a1fRafael Espindola const SectionKind secKind = Section.getKind(); 7227eae36b38b874f417fa191fc1cfec22c100f164dRafael Espindola 72325958730dffe0a16f9c251a1fa317799b8419a1fRafael Espindola if (secKind.isBSS()) 7241f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola return NULL; 7257eae36b38b874f417fa191fc1cfec22c100f164dRafael Espindola 72625958730dffe0a16f9c251a1fa317799b8419a1fRafael Espindola if (secKind.isThreadLocal()) { 72725958730dffe0a16f9c251a1fa317799b8419a1fRafael Espindola if (Renamed) 72825958730dffe0a16f9c251a1fa317799b8419a1fRafael Espindola return Renamed; 72925958730dffe0a16f9c251a1fa317799b8419a1fRafael Espindola return &Symbol; 73025958730dffe0a16f9c251a1fa317799b8419a1fRafael Espindola } 73125958730dffe0a16f9c251a1fa317799b8419a1fRafael Espindola 7328cecf253e45f144b9a7fd0ace85eeeeb0bebfc83Rafael Espindola MCSymbolRefExpr::VariantKind Kind = Target.getSymA()->getKind(); 7333729d0052bda365d04fee900c6f3d09460f1e108Rafael Espindola const MCSectionELF &Sec2 = 7343729d0052bda365d04fee900c6f3d09460f1e108Rafael Espindola static_cast<const MCSectionELF&>(F.getParent()->getSection()); 7353729d0052bda365d04fee900c6f3d09460f1e108Rafael Espindola 7368cecf253e45f144b9a7fd0ace85eeeeb0bebfc83Rafael Espindola if (&Sec2 != &Section && 737c97f80efc80030c7544a9903c79d2dccd197a0ffRafael Espindola (Kind == MCSymbolRefExpr::VK_PLT || 738c97f80efc80030c7544a9903c79d2dccd197a0ffRafael Espindola Kind == MCSymbolRefExpr::VK_GOTPCREL || 73925958730dffe0a16f9c251a1fa317799b8419a1fRafael Espindola Kind == MCSymbolRefExpr::VK_GOTOFF)) { 74094ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola if (Renamed) 74194ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola return Renamed; 74294ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola return &Symbol; 74394ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola } 7443729d0052bda365d04fee900c6f3d09460f1e108Rafael Espindola 7451f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola if (Section.getFlags() & MCSectionELF::SHF_MERGE) { 74694ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola if (Target.getConstant() == 0) 74794ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola return NULL; 74894ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola if (Renamed) 74994ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola return Renamed; 75094ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola return &Symbol; 7511f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola } 752c97f80efc80030c7544a9903c79d2dccd197a0ffRafael Espindola 7531f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola return NULL; 75473ffea47d20bc9f559b4ce0c60166ee504073832Rafael Espindola} 75573ffea47d20bc9f559b4ce0c60166ee504073832Rafael Espindola 7563565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 7570b6cbfe04cb36872255aff11a41a2b976ceba462Benjamin Krameruint64_t 758115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel DunbarELFObjectWriter::getSymbolIndexInSymbolTable(const MCAssembler &Asm, 759115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const MCSymbol *S) { 7607b83c26051b0474fb5f8b73ba6e74bd4f40324baBenjamin Kramer MCSymbolData &SD = Asm.getSymbolData(*S); 761ab4a7afe98fcd86418bd1672f880b7d3672f4543Rafael Espindola return SD.getIndex(); 7623565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 7633565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 764737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindolastatic bool isInSymtab(const MCAssembler &Asm, const MCSymbolData &Data, 76588182132470527e27231f09b25a885893e528c66Rafael Espindola bool Used, bool Renamed) { 766484291c27319668ad99cb87def000254357736fbRafael Espindola if (Data.getFlags() & ELF_Other_Weakref) 767484291c27319668ad99cb87def000254357736fbRafael Espindola return false; 768484291c27319668ad99cb87def000254357736fbRafael Espindola 769bd70118f163f94a4d77eb036e6f83dd0bfcb6268Rafael Espindola if (Used) 770bd70118f163f94a4d77eb036e6f83dd0bfcb6268Rafael Espindola return true; 771bd70118f163f94a4d77eb036e6f83dd0bfcb6268Rafael Espindola 77288182132470527e27231f09b25a885893e528c66Rafael Espindola if (Renamed) 77388182132470527e27231f09b25a885893e528c66Rafael Espindola return false; 77488182132470527e27231f09b25a885893e528c66Rafael Espindola 775737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola const MCSymbol &Symbol = Data.getSymbol(); 776a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola 777d179886f0595eb3564a9edfdfff79def130d89ccRafael Espindola if (Symbol.getName() == "_GLOBAL_OFFSET_TABLE_") 778d179886f0595eb3564a9edfdfff79def130d89ccRafael Espindola return true; 779d179886f0595eb3564a9edfdfff79def130d89ccRafael Espindola 78094ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola const MCSymbol &A = Symbol.AliasedSymbol(); 781d179886f0595eb3564a9edfdfff79def130d89ccRafael Espindola if (!A.isVariable() && A.isUndefined() && !Data.isCommon()) 782a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola return false; 783a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola 784737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola if (!Asm.isSymbolLinkerVisible(Symbol) && !Symbol.isUndefined()) 785737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola return false; 786737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola 787bd70118f163f94a4d77eb036e6f83dd0bfcb6268Rafael Espindola if (Symbol.isTemporary()) 788737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola return false; 789737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola 790737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola return true; 791737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola} 792737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola 7931f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindolastatic bool isLocal(const MCSymbolData &Data, bool isSignature, 7941f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola bool isUsedInReloc) { 795737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola if (Data.isExternal()) 796737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola return false; 797737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola 798737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola const MCSymbol &Symbol = Data.getSymbol(); 79994ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola const MCSymbol &RefSymbol = Symbol.AliasedSymbol(); 8001f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola 8011f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola if (RefSymbol.isUndefined() && !RefSymbol.isVariable()) { 8021f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola if (isSignature && !isUsedInReloc) 8031f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola return true; 8041f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola 805737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola return false; 8061f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola } 807737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola 808737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola return true; 809737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola} 810737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola 811115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::ComputeIndexMap(MCAssembler &Asm, 812115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar SectionIndexMapTy &SectionIndexMap) { 813bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola unsigned Index = 1; 814bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola for (MCAssembler::iterator it = Asm.begin(), 815bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola ie = Asm.end(); it != ie; ++it) { 816bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola const MCSectionELF &Section = 817bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola static_cast<const MCSectionELF &>(it->getSection()); 8182ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola if (Section.getType() != ELF::SHT_GROUP) 8192ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola continue; 8202ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola SectionIndexMap[&Section] = Index++; 8212ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola } 8222ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola 8232ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola for (MCAssembler::iterator it = Asm.begin(), 8242ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola ie = Asm.end(); it != ie; ++it) { 8252ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSectionELF &Section = 8262ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola static_cast<const MCSectionELF &>(it->getSection()); 8272ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola if (Section.getType() == ELF::SHT_GROUP) 8282ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola continue; 829bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola SectionIndexMap[&Section] = Index++; 830bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola } 831bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola} 832bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola 833115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::ComputeSymbolTable(MCAssembler &Asm, 8341f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola const SectionIndexMapTy &SectionIndexMap, 8351f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola RevGroupMapTy RevGroupMap) { 8365c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola // FIXME: Is this the correct place to do this? 8375c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola if (NeedsGOT) { 8385c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola llvm::StringRef Name = "_GLOBAL_OFFSET_TABLE_"; 8395c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola MCSymbol *Sym = Asm.getContext().GetOrCreateSymbol(Name); 8405c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola MCSymbolData &Data = Asm.getOrCreateSymbolData(*Sym); 8415c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola Data.setExternal(true); 842f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola SetBinding(Data, ELF::STB_GLOBAL); 8435c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola } 8445c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola 8453565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Build section lookup table. 846ab4a7afe98fcd86418bd1672f880b7d3672f4543Rafael Espindola int NumRegularSections = Asm.size(); 8473565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 8483565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Index 0 is always the empty string. 8493565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming StringMap<uint64_t> StringIndexMap; 8503565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming StringTable += '\x00'; 8513565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 852a0949b50dcea35c08b50542091f97275f401529dRafael Espindola // Add the data for the symbols. 8533565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming for (MCAssembler::symbol_iterator it = Asm.symbol_begin(), 8543565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming ie = Asm.symbol_end(); it != ie; ++it) { 8553565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming const MCSymbol &Symbol = it->getSymbol(); 8563565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 857484291c27319668ad99cb87def000254357736fbRafael Espindola bool Used = UsedInReloc.count(&Symbol); 858484291c27319668ad99cb87def000254357736fbRafael Espindola bool WeakrefUsed = WeakrefUsedInReloc.count(&Symbol); 8591f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola bool isSignature = RevGroupMap.count(&Symbol); 8601f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola 8611f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola if (!isInSymtab(Asm, *it, 8621f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola Used || WeakrefUsed || isSignature, 86388182132470527e27231f09b25a885893e528c66Rafael Espindola Renames.count(&Symbol))) 8643565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming continue; 8653565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 8663565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming ELFSymbolData MSD; 8673565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MSD.SymbolData = it; 86894ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola const MCSymbol &RefSymbol = Symbol.AliasedSymbol(); 8693565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 8701f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola // Undefined symbols are global, but this is the first place we 8711f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola // are able to set it. 8721f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola bool Local = isLocal(*it, isSignature, Used); 8731f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola if (!Local && GetBinding(*it) == ELF::STB_LOCAL) { 8741f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola MCSymbolData &SD = Asm.getSymbolData(RefSymbol); 8751f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola SetBinding(*it, ELF::STB_GLOBAL); 8761f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola SetBinding(SD, ELF::STB_GLOBAL); 8771f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola } 8781f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola 879484291c27319668ad99cb87def000254357736fbRafael Espindola if (RefSymbol.isUndefined() && !Used && WeakrefUsed) 880484291c27319668ad99cb87def000254357736fbRafael Espindola SetBinding(*it, ELF::STB_WEAK); 881484291c27319668ad99cb87def000254357736fbRafael Espindola 882f7c10a3cff61c70efe8e405d9bdc5386e8e3fc0aRafael Espindola if (it->isCommon()) { 883a0949b50dcea35c08b50542091f97275f401529dRafael Espindola assert(!Local); 884f7c10a3cff61c70efe8e405d9bdc5386e8e3fc0aRafael Espindola MSD.SectionIndex = ELF::SHN_COMMON; 885bf052ac5d1c8f21075bc675f629709c20791c5f7Rafael Espindola } else if (Symbol.isAbsolute() || RefSymbol.isVariable()) { 886a0949b50dcea35c08b50542091f97275f401529dRafael Espindola MSD.SectionIndex = ELF::SHN_ABS; 88788182132470527e27231f09b25a885893e528c66Rafael Espindola } else if (RefSymbol.isUndefined()) { 8881f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola if (isSignature && !Used) 8891f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola MSD.SectionIndex = SectionIndexMap.lookup(RevGroupMap[&Symbol]); 8901f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola else 8911f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola MSD.SectionIndex = ELF::SHN_UNDEF; 8923565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } else { 893bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola const MCSectionELF &Section = 894bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola static_cast<const MCSectionELF&>(RefSymbol.getSection()); 895bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola MSD.SectionIndex = SectionIndexMap.lookup(&Section); 8967be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola if (MSD.SectionIndex >= ELF::SHN_LORESERVE) 8977be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola NeedsSymtabShndx = true; 8983565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming assert(MSD.SectionIndex && "Invalid section index!"); 8995df0b65e8f5ef55f0b515a0b24879f5d117d6042Rafael Espindola } 9005df0b65e8f5ef55f0b515a0b24879f5d117d6042Rafael Espindola 90188182132470527e27231f09b25a885893e528c66Rafael Espindola // The @@@ in symbol version is replaced with @ in undefined symbols and 90288182132470527e27231f09b25a885893e528c66Rafael Espindola // @@ in defined ones. 90388182132470527e27231f09b25a885893e528c66Rafael Espindola StringRef Name = Symbol.getName(); 9041261a2ff99299946952013f284615a06afa3dc50Benjamin Kramer SmallString<32> Buf; 9051261a2ff99299946952013f284615a06afa3dc50Benjamin Kramer 90688182132470527e27231f09b25a885893e528c66Rafael Espindola size_t Pos = Name.find("@@@"); 90788182132470527e27231f09b25a885893e528c66Rafael Espindola if (Pos != StringRef::npos) { 9081261a2ff99299946952013f284615a06afa3dc50Benjamin Kramer Buf += Name.substr(0, Pos); 9091261a2ff99299946952013f284615a06afa3dc50Benjamin Kramer unsigned Skip = MSD.SectionIndex == ELF::SHN_UNDEF ? 2 : 1; 9101261a2ff99299946952013f284615a06afa3dc50Benjamin Kramer Buf += Name.substr(Pos + Skip); 9111261a2ff99299946952013f284615a06afa3dc50Benjamin Kramer Name = Buf; 91288182132470527e27231f09b25a885893e528c66Rafael Espindola } 91388182132470527e27231f09b25a885893e528c66Rafael Espindola 9141261a2ff99299946952013f284615a06afa3dc50Benjamin Kramer uint64_t &Entry = StringIndexMap[Name]; 915a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola if (!Entry) { 916a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola Entry = StringTable.size(); 9171261a2ff99299946952013f284615a06afa3dc50Benjamin Kramer StringTable += Name; 918a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola StringTable += '\x00'; 9193565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 920a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola MSD.StringIndex = Entry; 921a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola if (MSD.SectionIndex == ELF::SHN_UNDEF) 922a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola UndefinedSymbolData.push_back(MSD); 923a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola else if (Local) 924a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola LocalSymbolData.push_back(MSD); 925a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola else 926a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola ExternalSymbolData.push_back(MSD); 9273565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 9283565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 9293565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Symbols are required to be in lexicographic order. 9303565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming array_pod_sort(LocalSymbolData.begin(), LocalSymbolData.end()); 9313565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming array_pod_sort(ExternalSymbolData.begin(), ExternalSymbolData.end()); 9323565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming array_pod_sort(UndefinedSymbolData.begin(), UndefinedSymbolData.end()); 9333565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 9343565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Set the symbol indices. Local symbols must come before all other 9353565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // symbols with non-local bindings. 936ab4a7afe98fcd86418bd1672f880b7d3672f4543Rafael Espindola unsigned Index = 1; 9373565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming for (unsigned i = 0, e = LocalSymbolData.size(); i != e; ++i) 9383565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming LocalSymbolData[i].SymbolData->setIndex(Index++); 939ab4a7afe98fcd86418bd1672f880b7d3672f4543Rafael Espindola 940ab4a7afe98fcd86418bd1672f880b7d3672f4543Rafael Espindola Index += NumRegularSections; 941ab4a7afe98fcd86418bd1672f880b7d3672f4543Rafael Espindola 9423565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming for (unsigned i = 0, e = ExternalSymbolData.size(); i != e; ++i) 9433565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming ExternalSymbolData[i].SymbolData->setIndex(Index++); 9443565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming for (unsigned i = 0, e = UndefinedSymbolData.size(); i != e; ++i) 9453565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming UndefinedSymbolData[i].SymbolData->setIndex(Index++); 9463565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 9473565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 948115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::WriteRelocation(MCAssembler &Asm, MCAsmLayout &Layout, 949115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const MCSectionData &SD) { 9503565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming if (!Relocations[&SD].empty()) { 9513565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCContext &Ctx = Asm.getContext(); 9524283f4b81e8c1cbf5c7a7b51e949e109ae25ff8cRafael Espindola const MCSectionELF *RelaSection; 9533565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming const MCSectionELF &Section = 9543565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming static_cast<const MCSectionELF&>(SD.getSection()); 9553565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 9563565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming const StringRef SectionName = Section.getSectionName(); 957377a572d9b92304a0fde4371d726721586c1a5bdBenjamin Kramer std::string RelaSectionName = HasRelocationAddend ? ".rela" : ".rel"; 9583565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming RelaSectionName += SectionName; 959299fbe3a5aad8f08c52c488a9b28df70c7595e0dBenjamin Kramer 960299fbe3a5aad8f08c52c488a9b28df70c7595e0dBenjamin Kramer unsigned EntrySize; 961299fbe3a5aad8f08c52c488a9b28df70c7595e0dBenjamin Kramer if (HasRelocationAddend) 962299fbe3a5aad8f08c52c488a9b28df70c7595e0dBenjamin Kramer EntrySize = Is64Bit ? sizeof(ELF::Elf64_Rela) : sizeof(ELF::Elf32_Rela); 963299fbe3a5aad8f08c52c488a9b28df70c7595e0dBenjamin Kramer else 964299fbe3a5aad8f08c52c488a9b28df70c7595e0dBenjamin Kramer EntrySize = Is64Bit ? sizeof(ELF::Elf64_Rel) : sizeof(ELF::Elf32_Rel); 9653565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 966377a572d9b92304a0fde4371d726721586c1a5bdBenjamin Kramer RelaSection = Ctx.getELFSection(RelaSectionName, HasRelocationAddend ? 967377a572d9b92304a0fde4371d726721586c1a5bdBenjamin Kramer ELF::SHT_RELA : ELF::SHT_REL, 0, 9683565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming SectionKind::getReadOnly(), 9692ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola EntrySize, ""); 9703565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 9713565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCSectionData &RelaSD = Asm.getOrCreateSectionData(*RelaSection); 972a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer RelaSD.setAlignment(Is64Bit ? 8 : 4); 9733565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 9743565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCDataFragment *F = new MCDataFragment(&RelaSD); 9753565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 9763565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteRelocationsFragment(Asm, F, &SD); 9773565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 978115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar Asm.AddSectionToTheEnd(*this, RelaSD, Layout); 9793565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 9803565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 9813565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 982115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::WriteSecHdrEntry(uint32_t Name, uint32_t Type, 983115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint64_t Flags, uint64_t Address, 984115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint64_t Offset, uint64_t Size, 985115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint32_t Link, uint32_t Info, 986115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint64_t Alignment, 987115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint64_t EntrySize) { 9883565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write32(Name); // sh_name: index into string table 9893565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write32(Type); // sh_type 9903565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteWord(Flags); // sh_flags 9913565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteWord(Address); // sh_addr 9923565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteWord(Offset); // sh_offset 9933565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteWord(Size); // sh_size 9943565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write32(Link); // sh_link 9953565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write32(Info); // sh_info 9963565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteWord(Alignment); // sh_addralign 9973565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteWord(EntrySize); // sh_entsize 9983565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 9993565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1000115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::WriteRelocationsFragment(const MCAssembler &Asm, 1001115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar MCDataFragment *F, 1002115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const MCSectionData *SD) { 10033565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming std::vector<ELFRelocationEntry> &Relocs = Relocations[SD]; 10043565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // sort by the r_offset just like gnu as does 10053565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming array_pod_sort(Relocs.begin(), Relocs.end()); 10063565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 10073565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming for (unsigned i = 0, e = Relocs.size(); i != e; ++i) { 10083565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming ELFRelocationEntry entry = Relocs[e - i - 1]; 10093565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 101012203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola if (!entry.Index) 101112203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola ; 101212203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola else if (entry.Index < 0) 10138f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola entry.Index = getSymbolIndexInSymbolTable(Asm, entry.Symbol); 10148f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola else 101512203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola entry.Index += LocalSymbolData.size(); 10165e492e8d42fa1f2940165a937d3d613c61b57708Benjamin Kramer if (Is64Bit) { 1017af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String64(*F, entry.r_offset); 10185e492e8d42fa1f2940165a937d3d613c61b57708Benjamin Kramer 10198f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola struct ELF::Elf64_Rela ERE64; 10208f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola ERE64.setSymbolAndType(entry.Index, entry.Type); 1021af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String64(*F, ERE64.r_info); 10225e492e8d42fa1f2940165a937d3d613c61b57708Benjamin Kramer 1023af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola if (HasRelocationAddend) 1024af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String64(*F, entry.r_addend); 10255e492e8d42fa1f2940165a937d3d613c61b57708Benjamin Kramer } else { 1026af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String32(*F, entry.r_offset); 10275e492e8d42fa1f2940165a937d3d613c61b57708Benjamin Kramer 10288f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola struct ELF::Elf32_Rela ERE32; 10298f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola ERE32.setSymbolAndType(entry.Index, entry.Type); 1030af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String32(*F, ERE32.r_info); 10315e492e8d42fa1f2940165a937d3d613c61b57708Benjamin Kramer 1032af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola if (HasRelocationAddend) 1033af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String32(*F, entry.r_addend); 10345e492e8d42fa1f2940165a937d3d613c61b57708Benjamin Kramer } 10353565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 10363565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 10373565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1038115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::CreateMetadataSections(MCAssembler &Asm, 1039115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar MCAsmLayout &Layout, 10404beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola const SectionIndexMapTy &SectionIndexMap) { 10413565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCContext &Ctx = Asm.getContext(); 10423565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCDataFragment *F; 10433565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 10443565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming unsigned EntrySize = Is64Bit ? ELF::SYMENTRY_SIZE64 : ELF::SYMENTRY_SIZE32; 10453565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 104638738bf1a847292003a5495f17e42a75d1274bf7Rafael Espindola // We construct .shstrtab, .symtab and .strtab in this order to match gnu as. 10474283f4b81e8c1cbf5c7a7b51e949e109ae25ff8cRafael Espindola const MCSectionELF *ShstrtabSection = 10487be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola Ctx.getELFSection(".shstrtab", ELF::SHT_STRTAB, 0, 10493f2d13c98eb04962bf6fcfdcc6f62789bc820d79Rafael Espindola SectionKind::getReadOnly()); 105071859c640f6a36251aca223fd503c58dc314e296Rafael Espindola MCSectionData &ShstrtabSD = Asm.getOrCreateSectionData(*ShstrtabSection); 105171859c640f6a36251aca223fd503c58dc314e296Rafael Espindola ShstrtabSD.setAlignment(1); 105271859c640f6a36251aca223fd503c58dc314e296Rafael Espindola ShstrtabIndex = Asm.size(); 105371859c640f6a36251aca223fd503c58dc314e296Rafael Espindola 10544283f4b81e8c1cbf5c7a7b51e949e109ae25ff8cRafael Espindola const MCSectionELF *SymtabSection = 10557be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola Ctx.getELFSection(".symtab", ELF::SHT_SYMTAB, 0, 10567be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola SectionKind::getReadOnly(), 10572ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola EntrySize, ""); 10583565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCSectionData &SymtabSD = Asm.getOrCreateSectionData(*SymtabSection); 10593565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming SymtabSD.setAlignment(Is64Bit ? 8 : 4); 10607be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola SymbolTableIndex = Asm.size(); 10617be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola 10627be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola MCSectionData *SymtabShndxSD = NULL; 10637be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola 10647be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola if (NeedsSymtabShndx) { 10654283f4b81e8c1cbf5c7a7b51e949e109ae25ff8cRafael Espindola const MCSectionELF *SymtabShndxSection = 10667be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola Ctx.getELFSection(".symtab_shndx", ELF::SHT_SYMTAB_SHNDX, 0, 10672ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola SectionKind::getReadOnly(), 4, ""); 10687be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola SymtabShndxSD = &Asm.getOrCreateSectionData(*SymtabShndxSection); 10697be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola SymtabShndxSD->setAlignment(4); 10707be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola } 10713565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 10723565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming const MCSection *StrtabSection; 10733565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming StrtabSection = Ctx.getELFSection(".strtab", ELF::SHT_STRTAB, 0, 10743f2d13c98eb04962bf6fcfdcc6f62789bc820d79Rafael Espindola SectionKind::getReadOnly()); 10753565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCSectionData &StrtabSD = Asm.getOrCreateSectionData(*StrtabSection); 10763565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming StrtabSD.setAlignment(1); 10773565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming StringTableIndex = Asm.size(); 10783565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1079c3c413f63117896f186fc4385bdaac0578d3613fRafael Espindola WriteRelocations(Asm, Layout); 108071859c640f6a36251aca223fd503c58dc314e296Rafael Espindola 108171859c640f6a36251aca223fd503c58dc314e296Rafael Espindola // Symbol table 108271859c640f6a36251aca223fd503c58dc314e296Rafael Espindola F = new MCDataFragment(&SymtabSD); 10837be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola MCDataFragment *ShndxF = NULL; 10847be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola if (NeedsSymtabShndx) { 10857be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola ShndxF = new MCDataFragment(SymtabShndxSD); 1086115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar Asm.AddSectionToTheEnd(*this, *SymtabShndxSD, Layout); 10877be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola } 10884beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola WriteSymbolTable(F, ShndxF, Asm, Layout, SectionIndexMap); 1089115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar Asm.AddSectionToTheEnd(*this, SymtabSD, Layout); 109071859c640f6a36251aca223fd503c58dc314e296Rafael Espindola 10913565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming F = new MCDataFragment(&StrtabSD); 10923565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming F->getContents().append(StringTable.begin(), StringTable.end()); 1093115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar Asm.AddSectionToTheEnd(*this, StrtabSD, Layout); 10943565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 10953565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming F = new MCDataFragment(&ShstrtabSD); 10963565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 10973565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Section header string table. 10983565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // 10993565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // The first entry of a string table holds a null character so skip 11003565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // section 0. 11013565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint64_t Index = 1; 11023565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming F->getContents() += '\x00'; 11033565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 11042ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola StringMap<uint64_t> SecStringMap; 11053565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming for (MCAssembler::const_iterator it = Asm.begin(), 11063565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming ie = Asm.end(); it != ie; ++it) { 11073565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming const MCSectionELF &Section = 1108368ae7e4ec0cc0dfc404fa1d07cdf94a7f2a15beBenjamin Kramer static_cast<const MCSectionELF&>(it->getSection()); 110951efe7a253190b672519e8388ce5d45f1dcf1a24Rafael Espindola // FIXME: We could merge suffixes like in .text and .rela.text. 11103565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 11112ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola StringRef Name = Section.getSectionName(); 11122ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola if (SecStringMap.count(Name)) { 11132ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola SectionStringTableIndex[&Section] = SecStringMap[Name]; 11142ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola continue; 11152ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola } 11163565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Remember the index into the string table so we can write it 11173565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // into the sh_name field of the section header table. 11182ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola SectionStringTableIndex[&Section] = Index; 11192ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola SecStringMap[Name] = Index; 11203565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 11212ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola Index += Name.size() + 1; 11222ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola F->getContents() += Name; 11233565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming F->getContents() += '\x00'; 11243565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 11253565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1126115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar Asm.AddSectionToTheEnd(*this, ShstrtabSD, Layout); 11277070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola} 11287070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola 1129115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarbool ELFObjectWriter::IsFixupFullyResolved(const MCAssembler &Asm, 1130115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const MCValue Target, 1131115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar bool IsPCRel, 1132115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const MCFragment *DF) const { 11337070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola // If this is a PCrel relocation, find the section this fixup value is 11347070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola // relative to. 11357070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola const MCSection *BaseSection = 0; 11367070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola if (IsPCRel) { 11377070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola BaseSection = &DF->getParent()->getSection(); 11387070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola assert(BaseSection); 11397070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola } 11407070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola 11417070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola const MCSection *SectionA = 0; 11427070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola const MCSymbol *SymbolA = 0; 11437070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola if (const MCSymbolRefExpr *A = Target.getSymA()) { 11442c920850343810535c0cd8720a81eddf7997663aRafael Espindola SymbolA = &A->getSymbol(); 11452c920850343810535c0cd8720a81eddf7997663aRafael Espindola SectionA = &SymbolA->AliasedSymbol().getSection(); 11467070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola } 11477070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola 11487070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola const MCSection *SectionB = 0; 114912203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola const MCSymbol *SymbolB = 0; 11507070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola if (const MCSymbolRefExpr *B = Target.getSymB()) { 115112203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola SymbolB = &B->getSymbol(); 115212203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola SectionB = &SymbolB->AliasedSymbol().getSection(); 11537070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola } 11547070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola 11557070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola if (!BaseSection) 11567070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola return SectionA == SectionB; 11577070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola 115812203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola if (SymbolB) 115912203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola return false; 116012203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola 116112203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola // Absolute address but PCrel instruction, so we need a relocation. 116212203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola if (!SymbolA) 116312203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola return false; 116412203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola 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 const MCSymbolData &DataA = Asm.getSymbolData(*SymbolA); 11697070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola if (DataA.isExternal()) 11707070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola return false; 11717070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola 117212203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola return BaseSection == SectionA; 11733565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 11743565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1175115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::CreateGroupSections(MCAssembler &Asm, 1176115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar MCAsmLayout &Layout, 11771f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola GroupMapTy &GroupMap, 11781f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola RevGroupMapTy &RevGroupMap) { 11792ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola // Build the groups 11802ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola for (MCAssembler::const_iterator it = Asm.begin(), ie = Asm.end(); 11812ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola it != ie; ++it) { 11822ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSectionELF &Section = 11832ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola static_cast<const MCSectionELF&>(it->getSection()); 11842ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola if (!(Section.getFlags() & MCSectionELF::SHF_GROUP)) 11852ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola continue; 11862ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola 11872ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSymbol *SignatureSymbol = Section.getGroup(); 11882ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola Asm.getOrCreateSymbolData(*SignatureSymbol); 11891f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola const MCSectionELF *&Group = RevGroupMap[SignatureSymbol]; 11902ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola if (!Group) { 11912ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola Group = Asm.getContext().CreateELFGroupSection(); 11922ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola MCSectionData &Data = Asm.getOrCreateSectionData(*Group); 11932ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola Data.setAlignment(4); 11942ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola MCDataFragment *F = new MCDataFragment(&Data); 11952ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola String32(*F, ELF::GRP_COMDAT); 11962ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola } 11972ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola GroupMap[Group] = SignatureSymbol; 11982ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola } 11992ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola 12002ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola // Add sections to the groups 12012ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola unsigned Index = 1; 12021f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola unsigned NumGroups = RevGroupMap.size(); 12032ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola for (MCAssembler::const_iterator it = Asm.begin(), ie = Asm.end(); 12042ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola it != ie; ++it, ++Index) { 12052ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSectionELF &Section = 12062ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola static_cast<const MCSectionELF&>(it->getSection()); 12072ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola if (!(Section.getFlags() & MCSectionELF::SHF_GROUP)) 12082ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola continue; 12091f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola const MCSectionELF *Group = RevGroupMap[Section.getGroup()]; 12102ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola MCSectionData &Data = Asm.getOrCreateSectionData(*Group); 12112ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola // FIXME: we could use the previous fragment 12122ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola MCDataFragment *F = new MCDataFragment(&Data); 12132ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola String32(*F, NumGroups + Index); 12142ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola } 12152ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola 12161f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola for (RevGroupMapTy::const_iterator i = RevGroupMap.begin(), 12171f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola e = RevGroupMap.end(); i != e; ++i) { 12182ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSectionELF *Group = i->second; 12192ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola MCSectionData &Data = Asm.getOrCreateSectionData(*Group); 1220115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar Asm.AddSectionToTheEnd(*this, Data, Layout); 12212ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola } 12222ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola} 12232ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola 1224115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::WriteSection(MCAssembler &Asm, 1225115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const SectionIndexMapTy &SectionIndexMap, 1226115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint32_t GroupSymbolIndex, 1227115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint64_t Offset, uint64_t Size, 1228115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint64_t Alignment, 1229115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const MCSectionELF &Section) { 1230c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola uint64_t sh_link = 0; 1231c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola uint64_t sh_info = 0; 1232c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 1233c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola switch(Section.getType()) { 1234c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_DYNAMIC: 1235c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola sh_link = SectionStringTableIndex[&Section]; 1236c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola sh_info = 0; 1237c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola break; 1238c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 1239c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_REL: 1240c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_RELA: { 1241c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola const MCSectionELF *SymtabSection; 1242c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola const MCSectionELF *InfoSection; 1243c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola SymtabSection = Asm.getContext().getELFSection(".symtab", ELF::SHT_SYMTAB, 1244c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 0, 12453f2d13c98eb04962bf6fcfdcc6f62789bc820d79Rafael Espindola SectionKind::getReadOnly()); 1246c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola sh_link = SectionIndexMap.lookup(SymtabSection); 1247c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola assert(sh_link && ".symtab not found"); 1248c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 1249c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola // Remove ".rel" and ".rela" prefixes. 1250c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola unsigned SecNameLen = (Section.getType() == ELF::SHT_REL) ? 4 : 5; 1251c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola StringRef SectionName = Section.getSectionName().substr(SecNameLen); 1252c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 1253c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola InfoSection = Asm.getContext().getELFSection(SectionName, 1254c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola ELF::SHT_PROGBITS, 0, 12553f2d13c98eb04962bf6fcfdcc6f62789bc820d79Rafael Espindola SectionKind::getReadOnly()); 1256c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola sh_info = SectionIndexMap.lookup(InfoSection); 1257c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola break; 1258c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola } 1259c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 1260c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_SYMTAB: 1261c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_DYNSYM: 1262c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola sh_link = StringTableIndex; 1263c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola sh_info = LastLocalSymbolIndex; 1264c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola break; 1265c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 1266c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_SYMTAB_SHNDX: 1267c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola sh_link = SymbolTableIndex; 1268c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola break; 1269c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 1270c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_PROGBITS: 1271c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_STRTAB: 1272c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_NOBITS: 1273c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_NULL: 1274c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_ARM_ATTRIBUTES: 1275c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola // Nothing to do. 1276c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola break; 1277c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 12782ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola case ELF::SHT_GROUP: { 12792ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola sh_link = SymbolTableIndex; 12802ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola sh_info = GroupSymbolIndex; 12812ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola break; 12822ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola } 12832ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola 1284c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola default: 1285c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola assert(0 && "FIXME: sh_type value not supported!"); 1286c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola break; 1287c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola } 1288c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 1289c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola WriteSecHdrEntry(SectionStringTableIndex[&Section], Section.getType(), 1290c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola Section.getFlags(), 0, Offset, Size, sh_link, sh_info, 1291c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola Alignment, Section.getEntrySize()); 1292c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola} 1293c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 1294115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::WriteObject(MCAssembler &Asm, 1295115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const MCAsmLayout &Layout) { 12962ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola GroupMapTy GroupMap; 12971f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola RevGroupMapTy RevGroupMap; 12981f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola CreateGroupSections(Asm, const_cast<MCAsmLayout&>(Layout), GroupMap, 12991f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola RevGroupMap); 13002ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola 1301bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola SectionIndexMapTy SectionIndexMap; 1302bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola 1303bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola ComputeIndexMap(Asm, SectionIndexMap); 1304bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola 13058f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola // Compute symbol table information. 13061f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola ComputeSymbolTable(Asm, SectionIndexMap, RevGroupMap); 13078f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola 13083565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming CreateMetadataSections(const_cast<MCAssembler&>(Asm), 13094beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola const_cast<MCAsmLayout&>(Layout), 13104beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola SectionIndexMap); 13113565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 13121d739a010d49914eae7b6c415dd6de76ca142030Rafael Espindola // Update to include the metadata sections. 13131d739a010d49914eae7b6c415dd6de76ca142030Rafael Espindola ComputeIndexMap(Asm, SectionIndexMap); 13141d739a010d49914eae7b6c415dd6de76ca142030Rafael Espindola 13153565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Add 1 for the null section. 13163565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming unsigned NumSections = Asm.size() + 1; 1317a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer uint64_t NaturalAlignment = Is64Bit ? 8 : 4; 1318a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer uint64_t HeaderSize = Is64Bit ? sizeof(ELF::Elf64_Ehdr) : sizeof(ELF::Elf32_Ehdr); 1319a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer uint64_t FileOff = HeaderSize; 13203565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 13212ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola std::vector<const MCSectionELF*> Sections; 13222ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola Sections.resize(NumSections); 13232ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola 13242ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola for (SectionIndexMapTy::const_iterator i= 13252ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola SectionIndexMap.begin(), e = SectionIndexMap.end(); i != e; ++i) { 13262ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const std::pair<const MCSectionELF*, uint32_t> &p = *i; 13272ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola Sections[p.second] = p.first; 13282ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola } 13292ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola 13302ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola for (unsigned i = 1; i < NumSections; ++i) { 13312ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSectionELF &Section = *Sections[i]; 13322ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSectionData &SD = Asm.getOrCreateSectionData(Section); 13333565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1334a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer FileOff = RoundUpToAlignment(FileOff, SD.getAlignment()); 1335a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer 13363565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Get the size of the section in the output file (including padding). 13373565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint64_t Size = Layout.getSectionFileSize(&SD); 1338a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer 1339a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer FileOff += Size; 13403565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 13413565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1342a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer FileOff = RoundUpToAlignment(FileOff, NaturalAlignment); 1343a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer 13443565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Write out the ELF header ... 1345a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer WriteHeader(FileOff - HeaderSize, NumSections); 1346a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer 1347a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer FileOff = HeaderSize; 13483565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 13493565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // ... then all of the sections ... 13503565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming DenseMap<const MCSection*, uint64_t> SectionOffsetMap; 13513565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 13522ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola for (unsigned i = 1; i < NumSections; ++i) { 13532ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSectionELF &Section = *Sections[i]; 13542ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSectionData &SD = Asm.getOrCreateSectionData(Section); 1355a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer 1356a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer uint64_t Padding = OffsetToAlignment(FileOff, SD.getAlignment()); 1357a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer WriteZeros(Padding); 1358a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer FileOff += Padding; 1359a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer 13603565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Remember the offset into the file for this section. 13612ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola SectionOffsetMap[&Section] = FileOff; 136244cbde85badb60c7078e37e14575c15e671521b1Benjamin Kramer 13633565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming FileOff += Layout.getSectionFileSize(&SD); 13643565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1365115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar Asm.WriteSectionData(&SD, Layout, this); 13663565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 13673565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1368a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer uint64_t Padding = OffsetToAlignment(FileOff, NaturalAlignment); 1369a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer WriteZeros(Padding); 1370a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer FileOff += Padding; 1371a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer 13723565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // ... and then the section header table. 13733565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Should we align the section header table? 13743565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // 13753565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Null section first. 13767be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola uint64_t FirstSectionSize = 13777be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola NumSections >= ELF::SHN_LORESERVE ? NumSections : 0; 13787be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola uint32_t FirstSectionLink = 13797be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola ShstrtabIndex >= ELF::SHN_LORESERVE ? ShstrtabIndex : 0; 13807be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola WriteSecHdrEntry(0, 0, 0, 0, 0, FirstSectionSize, FirstSectionLink, 0, 0, 0); 13813565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 13822ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola for (unsigned i = 1; i < NumSections; ++i) { 13832ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSectionELF &Section = *Sections[i]; 13842ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSectionData &SD = Asm.getOrCreateSectionData(Section); 13852ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola uint32_t GroupSymbolIndex; 13862ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola if (Section.getType() != ELF::SHT_GROUP) 13872ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola GroupSymbolIndex = 0; 13882ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola else 13892ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola GroupSymbolIndex = getSymbolIndexInSymbolTable(Asm, GroupMap[&Section]); 13903565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 13912ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola WriteSection(Asm, SectionIndexMap, GroupSymbolIndex, 13922ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola SectionOffsetMap[&Section], Layout.getSectionSize(&SD), 1393c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola SD.getAlignment(), Section); 13943565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 13953565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 13963565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1397115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel DunbarMCObjectWriter *llvm::createELFObjectWriter(raw_ostream &OS, 1398115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar bool Is64Bit, 1399115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar Triple::OSType OSType, 1400115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint16_t EMachine, 1401115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar bool IsLittleEndian, 1402115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar bool HasRelocationAddend) { 1403d3443e99e43945fdb0742177da06a32fa225740dJason W Kim switch (EMachine) { 1404d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case ELF::EM_386: 1405d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case ELF::EM_X86_64: 1406d3443e99e43945fdb0742177da06a32fa225740dJason W Kim return new X86ELFObjectWriter(OS, Is64Bit, IsLittleEndian, EMachine, 1407d3443e99e43945fdb0742177da06a32fa225740dJason W Kim HasRelocationAddend, OSType); break; 1408d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case ELF::EM_ARM: 1409d3443e99e43945fdb0742177da06a32fa225740dJason W Kim return new ARMELFObjectWriter(OS, Is64Bit, IsLittleEndian, EMachine, 1410d3443e99e43945fdb0742177da06a32fa225740dJason W Kim HasRelocationAddend, OSType); break; 14114b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck case ELF::EM_MBLAZE: 14124b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck return new MBlazeELFObjectWriter(OS, Is64Bit, IsLittleEndian, EMachine, 14134b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck HasRelocationAddend, OSType); break; 14143285877131ed40d7fe75babf4ee3f4e0d287e4a4Benjamin Kramer default: llvm_unreachable("Unsupported architecture"); break; 1415d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1416d3443e99e43945fdb0742177da06a32fa225740dJason W Kim} 1417d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1418d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1419d3443e99e43945fdb0742177da06a32fa225740dJason W Kim/// START OF SUBCLASSES for ELFObjectWriter 1420d3443e99e43945fdb0742177da06a32fa225740dJason W Kim//===- ARMELFObjectWriter -------------------------------------------===// 1421d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1422d3443e99e43945fdb0742177da06a32fa225740dJason W KimARMELFObjectWriter::ARMELFObjectWriter(raw_ostream &_OS, bool _Is64Bit, 1423d3443e99e43945fdb0742177da06a32fa225740dJason W Kim bool _IsLittleEndian, 1424d3443e99e43945fdb0742177da06a32fa225740dJason W Kim uint16_t _EMachine, bool _HasRelocationAddend, 1425d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Triple::OSType _OSType) 1426d3443e99e43945fdb0742177da06a32fa225740dJason W Kim : ELFObjectWriter(_OS, _Is64Bit, _IsLittleEndian, _EMachine, 1427d3443e99e43945fdb0742177da06a32fa225740dJason W Kim _HasRelocationAddend, _OSType) 1428d3443e99e43945fdb0742177da06a32fa225740dJason W Kim{} 1429d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1430d3443e99e43945fdb0742177da06a32fa225740dJason W KimARMELFObjectWriter::~ARMELFObjectWriter() 1431d3443e99e43945fdb0742177da06a32fa225740dJason W Kim{} 1432d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1433d3443e99e43945fdb0742177da06a32fa225740dJason W Kimvoid ARMELFObjectWriter::RecordRelocation(const MCAssembler &Asm, 1434d3443e99e43945fdb0742177da06a32fa225740dJason W Kim const MCAsmLayout &Layout, 1435d3443e99e43945fdb0742177da06a32fa225740dJason W Kim const MCFragment *Fragment, 1436d3443e99e43945fdb0742177da06a32fa225740dJason W Kim const MCFixup &Fixup, 1437d3443e99e43945fdb0742177da06a32fa225740dJason W Kim MCValue Target, 1438d3443e99e43945fdb0742177da06a32fa225740dJason W Kim uint64_t &FixedValue) { 1439d3443e99e43945fdb0742177da06a32fa225740dJason W Kim assert(0 && "ARMELFObjectWriter::RecordRelocation() unimplemented"); 1440d3443e99e43945fdb0742177da06a32fa225740dJason W Kim} 1441d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 14424b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck//===- MBlazeELFObjectWriter -------------------------------------------===// 1443d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 14444b04713423c6da988db75c7546baa3db7ddfa119Wesley PeckMBlazeELFObjectWriter::MBlazeELFObjectWriter(raw_ostream &_OS, bool _Is64Bit, 14454b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck bool _IsLittleEndian, 14464b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck uint16_t _EMachine, 14474b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck bool _HasRelocationAddend, 14484b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck Triple::OSType _OSType) 14494b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck : ELFObjectWriter(_OS, _Is64Bit, _IsLittleEndian, _EMachine, 14504b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck _HasRelocationAddend, _OSType) { 14514b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck} 14524b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 14534b04713423c6da988db75c7546baa3db7ddfa119Wesley PeckMBlazeELFObjectWriter::~MBlazeELFObjectWriter() { 14544b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck} 14554b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 14564b04713423c6da988db75c7546baa3db7ddfa119Wesley Peckvoid MBlazeELFObjectWriter::RecordRelocation(const MCAssembler &Asm, 14574b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck const MCAsmLayout &Layout, 14584b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck const MCFragment *Fragment, 14594b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck const MCFixup &Fixup, 14604b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck MCValue Target, 14614b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck uint64_t &FixedValue) { 14624b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck int64_t Addend = 0; 14634b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck int Index = 0; 14644b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck int64_t Value = Target.getConstant(); 14654b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck const MCSymbol &Symbol = Target.getSymA()->getSymbol(); 14664b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck const MCSymbol &ASymbol = Symbol.AliasedSymbol(); 14674b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck const MCSymbol *RelocSymbol = SymbolToReloc(Asm, Target, *Fragment); 14684b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 14694a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim bool IsPCRel = isFixupKindPCRel(Fixup.getKind()); 14704b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck if (!Target.isAbsolute()) { 14714b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck if (const MCSymbolRefExpr *RefB = Target.getSymB()) { 14724b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck const MCSymbol &SymbolB = RefB->getSymbol(); 14734b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck MCSymbolData &SDB = Asm.getSymbolData(SymbolB); 14744b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck IsPCRel = true; 14754b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck MCSectionData *Sec = Fragment->getParent(); 14764b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 14774b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck // Offset of the symbol in the section 14784b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck int64_t a = Layout.getSymbolAddress(&SDB) - Layout.getSectionAddress(Sec); 14794b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 14804b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck // Ofeset of the relocation in the section 14814b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck int64_t b = Layout.getFragmentOffset(Fragment) + Fixup.getOffset(); 14824b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck Value += b - a; 14834b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck } 14844b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 14854b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck if (!RelocSymbol) { 14864b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck MCSymbolData &SD = Asm.getSymbolData(ASymbol); 14874b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck MCFragment *F = SD.getFragment(); 14884b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 14894b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck Index = F->getParent()->getOrdinal(); 14904b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 14914b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck MCSectionData *FSD = F->getParent(); 14924b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck // Offset of the symbol in the section 14934b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck Value += Layout.getSymbolAddress(&SD) - Layout.getSectionAddress(FSD); 14944b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck } else { 14954b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck if (Asm.getSymbolData(Symbol).getFlags() & ELF_Other_Weakref) 14964b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck WeakrefUsedInReloc.insert(RelocSymbol); 14974b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck else 14984b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck UsedInReloc.insert(RelocSymbol); 14994b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck Index = -1; 15004b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck } 15014b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck Addend = Value; 15024b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck } 15034b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 15044b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck FixedValue = Value; 15054b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 15064b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck // determine the type of the relocation 15074b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck unsigned Type; 15084b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck if (IsPCRel) { 15094b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck switch ((unsigned)Fixup.getKind()) { 15104b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck default: 15114b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck llvm_unreachable("Unimplemented"); 15124b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck case MBlaze::reloc_pcrel_4byte: 15134b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck Type = ELF::R_MICROBLAZE_64_PCREL; 15144b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck break; 15154b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck case MBlaze::reloc_pcrel_2byte: 15164b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck Type = ELF::R_MICROBLAZE_32_PCREL; 15174b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck break; 15184b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck } 15194b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck } else { 15204b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck switch ((unsigned)Fixup.getKind()) { 15214b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck default: llvm_unreachable("invalid fixup kind!"); 15224b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck case FK_Data_4: 15234b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck Type = (RelocSymbol || Addend !=0) ? ELF::R_MICROBLAZE_32 15244b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck : ELF::R_MICROBLAZE_64; 15254b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck break; 15264b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck case FK_Data_2: 15274b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck Type = ELF::R_MICROBLAZE_32; 15284b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck break; 15294b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck } 15304b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck } 15314b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 15324b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck MCSymbolRefExpr::VariantKind Modifier = Target.getSymA()->getKind(); 15334b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck if (RelocNeedsGOT(Modifier)) 15344b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck NeedsGOT = true; 15354b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 1536858e7506e1fabe563eb4222c80ad0fad01641becJason W Kim uint64_t RelocOffset = Layout.getFragmentOffset(Fragment) + 15374a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim Fixup.getOffset(); 15384b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 153910907426893019c6b7e59c886e41815d4fe50b19Jason W Kim if (!HasRelocationAddend) Addend = 0; 15404a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim ELFRelocationEntry ERE(RelocOffset, Index, Type, RelocSymbol, Addend); 15414b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck Relocations[Fragment->getParent()].push_back(ERE); 15424b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck} 1543d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1544d3443e99e43945fdb0742177da06a32fa225740dJason W Kim//===- X86ELFObjectWriter -------------------------------------------===// 1545d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1546d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1547d3443e99e43945fdb0742177da06a32fa225740dJason W KimX86ELFObjectWriter::X86ELFObjectWriter(raw_ostream &_OS, bool _Is64Bit, 1548d3443e99e43945fdb0742177da06a32fa225740dJason W Kim bool _IsLittleEndian, 1549d3443e99e43945fdb0742177da06a32fa225740dJason W Kim uint16_t _EMachine, bool _HasRelocationAddend, 1550d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Triple::OSType _OSType) 1551d3443e99e43945fdb0742177da06a32fa225740dJason W Kim : ELFObjectWriter(_OS, _Is64Bit, _IsLittleEndian, _EMachine, 1552d3443e99e43945fdb0742177da06a32fa225740dJason W Kim _HasRelocationAddend, _OSType) 1553d3443e99e43945fdb0742177da06a32fa225740dJason W Kim{} 1554d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1555d3443e99e43945fdb0742177da06a32fa225740dJason W KimX86ELFObjectWriter::~X86ELFObjectWriter() 1556d3443e99e43945fdb0742177da06a32fa225740dJason W Kim{} 1557d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1558d3443e99e43945fdb0742177da06a32fa225740dJason W Kimvoid X86ELFObjectWriter::RecordRelocation(const MCAssembler &Asm, 1559d3443e99e43945fdb0742177da06a32fa225740dJason W Kim const MCAsmLayout &Layout, 1560d3443e99e43945fdb0742177da06a32fa225740dJason W Kim const MCFragment *Fragment, 1561d3443e99e43945fdb0742177da06a32fa225740dJason W Kim const MCFixup &Fixup, 1562d3443e99e43945fdb0742177da06a32fa225740dJason W Kim MCValue Target, 1563d3443e99e43945fdb0742177da06a32fa225740dJason W Kim uint64_t &FixedValue) { 1564d3443e99e43945fdb0742177da06a32fa225740dJason W Kim int64_t Addend = 0; 1565d3443e99e43945fdb0742177da06a32fa225740dJason W Kim int Index = 0; 1566d3443e99e43945fdb0742177da06a32fa225740dJason W Kim int64_t Value = Target.getConstant(); 156712203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola const MCSymbol *RelocSymbol = NULL; 1568d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 15694a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim bool IsPCRel = isFixupKindPCRel(Fixup.getKind()); 1570d3443e99e43945fdb0742177da06a32fa225740dJason W Kim if (!Target.isAbsolute()) { 157112203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola const MCSymbol &Symbol = Target.getSymA()->getSymbol(); 157212203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola const MCSymbol &ASymbol = Symbol.AliasedSymbol(); 157312203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola RelocSymbol = SymbolToReloc(Asm, Target, *Fragment); 157412203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola 1575d3443e99e43945fdb0742177da06a32fa225740dJason W Kim if (const MCSymbolRefExpr *RefB = Target.getSymB()) { 1576d3443e99e43945fdb0742177da06a32fa225740dJason W Kim const MCSymbol &SymbolB = RefB->getSymbol(); 1577d3443e99e43945fdb0742177da06a32fa225740dJason W Kim MCSymbolData &SDB = Asm.getSymbolData(SymbolB); 1578d3443e99e43945fdb0742177da06a32fa225740dJason W Kim IsPCRel = true; 1579d3443e99e43945fdb0742177da06a32fa225740dJason W Kim MCSectionData *Sec = Fragment->getParent(); 1580d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1581d3443e99e43945fdb0742177da06a32fa225740dJason W Kim // Offset of the symbol in the section 1582d3443e99e43945fdb0742177da06a32fa225740dJason W Kim int64_t a = Layout.getSymbolAddress(&SDB) - Layout.getSectionAddress(Sec); 1583d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1584d3443e99e43945fdb0742177da06a32fa225740dJason W Kim // Ofeset of the relocation in the section 1585d3443e99e43945fdb0742177da06a32fa225740dJason W Kim int64_t b = Layout.getFragmentOffset(Fragment) + Fixup.getOffset(); 1586d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Value += b - a; 1587d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1588d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1589d3443e99e43945fdb0742177da06a32fa225740dJason W Kim if (!RelocSymbol) { 159094ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola MCSymbolData &SD = Asm.getSymbolData(ASymbol); 1591d3443e99e43945fdb0742177da06a32fa225740dJason W Kim MCFragment *F = SD.getFragment(); 1592d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 159312203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola Index = F->getParent()->getOrdinal() + 1; 1594d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1595d3443e99e43945fdb0742177da06a32fa225740dJason W Kim MCSectionData *FSD = F->getParent(); 1596d3443e99e43945fdb0742177da06a32fa225740dJason W Kim // Offset of the symbol in the section 1597d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Value += Layout.getSymbolAddress(&SD) - Layout.getSectionAddress(FSD); 1598d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } else { 1599d3443e99e43945fdb0742177da06a32fa225740dJason W Kim if (Asm.getSymbolData(Symbol).getFlags() & ELF_Other_Weakref) 1600d3443e99e43945fdb0742177da06a32fa225740dJason W Kim WeakrefUsedInReloc.insert(RelocSymbol); 1601d3443e99e43945fdb0742177da06a32fa225740dJason W Kim else 1602d3443e99e43945fdb0742177da06a32fa225740dJason W Kim UsedInReloc.insert(RelocSymbol); 1603d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Index = -1; 1604d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1605d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Addend = Value; 1606d3443e99e43945fdb0742177da06a32fa225740dJason W Kim // Compensate for the addend on i386. 1607d3443e99e43945fdb0742177da06a32fa225740dJason W Kim if (Is64Bit) 1608d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Value = 0; 1609d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1610d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1611d3443e99e43945fdb0742177da06a32fa225740dJason W Kim FixedValue = Value; 1612d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1613d3443e99e43945fdb0742177da06a32fa225740dJason W Kim // determine the type of the relocation 1614d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 161512203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola MCSymbolRefExpr::VariantKind Modifier = Target.isAbsolute() ? 161612203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola MCSymbolRefExpr::VK_None : Target.getSymA()->getKind(); 1617d3443e99e43945fdb0742177da06a32fa225740dJason W Kim unsigned Type; 1618d3443e99e43945fdb0742177da06a32fa225740dJason W Kim if (Is64Bit) { 1619d3443e99e43945fdb0742177da06a32fa225740dJason W Kim if (IsPCRel) { 1620d3443e99e43945fdb0742177da06a32fa225740dJason W Kim switch (Modifier) { 1621d3443e99e43945fdb0742177da06a32fa225740dJason W Kim default: 1622d3443e99e43945fdb0742177da06a32fa225740dJason W Kim llvm_unreachable("Unimplemented"); 1623d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_None: 1624d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_X86_64_PC32; 1625d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1626d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_PLT: 1627d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_X86_64_PLT32; 1628d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1629d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_GOTPCREL: 1630d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_X86_64_GOTPCREL; 1631d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1632d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_GOTTPOFF: 1633d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_X86_64_GOTTPOFF; 1634d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1635d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_TLSGD: 1636d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_X86_64_TLSGD; 1637d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1638d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_TLSLD: 1639d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_X86_64_TLSLD; 1640d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1641d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1642d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } else { 1643d3443e99e43945fdb0742177da06a32fa225740dJason W Kim switch ((unsigned)Fixup.getKind()) { 1644d3443e99e43945fdb0742177da06a32fa225740dJason W Kim default: llvm_unreachable("invalid fixup kind!"); 1645d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case FK_Data_8: Type = ELF::R_X86_64_64; break; 1646d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case X86::reloc_signed_4byte: 1647d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case X86::reloc_pcrel_4byte: 1648d3443e99e43945fdb0742177da06a32fa225740dJason W Kim assert(isInt<32>(Target.getConstant())); 1649d3443e99e43945fdb0742177da06a32fa225740dJason W Kim switch (Modifier) { 1650d3443e99e43945fdb0742177da06a32fa225740dJason W Kim default: 1651d3443e99e43945fdb0742177da06a32fa225740dJason W Kim llvm_unreachable("Unimplemented"); 1652d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_None: 1653d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_X86_64_32S; 1654d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1655d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_GOT: 1656d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_X86_64_GOT32; 1657d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1658d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_GOTPCREL: 1659d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_X86_64_GOTPCREL; 1660d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1661d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_TPOFF: 1662d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_X86_64_TPOFF32; 1663d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1664d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_DTPOFF: 1665d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_X86_64_DTPOFF32; 1666d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1667d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1668d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1669d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case FK_Data_4: 1670d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_X86_64_32; 1671d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1672d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case FK_Data_2: Type = ELF::R_X86_64_16; break; 1673d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case X86::reloc_pcrel_1byte: 1674d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case FK_Data_1: Type = ELF::R_X86_64_8; break; 1675d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1676d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1677d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } else { 1678d3443e99e43945fdb0742177da06a32fa225740dJason W Kim if (IsPCRel) { 1679d3443e99e43945fdb0742177da06a32fa225740dJason W Kim switch (Modifier) { 1680d3443e99e43945fdb0742177da06a32fa225740dJason W Kim default: 1681d3443e99e43945fdb0742177da06a32fa225740dJason W Kim llvm_unreachable("Unimplemented"); 1682d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_None: 1683d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_PC32; 1684d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1685d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_PLT: 1686d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_PLT32; 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 1693d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case X86::reloc_global_offset_table: 1694d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_GOTPC; 1695d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1696d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1697d3443e99e43945fdb0742177da06a32fa225740dJason W Kim // FIXME: Should we avoid selecting reloc_signed_4byte in 32 bit mode 1698d3443e99e43945fdb0742177da06a32fa225740dJason W Kim // instead? 1699d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case X86::reloc_signed_4byte: 1700d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case X86::reloc_pcrel_4byte: 1701d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case FK_Data_4: 1702d3443e99e43945fdb0742177da06a32fa225740dJason W Kim switch (Modifier) { 1703d3443e99e43945fdb0742177da06a32fa225740dJason W Kim default: 1704d3443e99e43945fdb0742177da06a32fa225740dJason W Kim llvm_unreachable("Unimplemented"); 1705d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_None: 1706d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_32; 1707d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1708d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_GOT: 1709d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_GOT32; 1710d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1711d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_GOTOFF: 1712d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_GOTOFF; 1713d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1714d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_TLSGD: 1715d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_TLS_GD; 1716d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1717d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_TPOFF: 1718d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_TLS_LE_32; 1719d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1720d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_INDNTPOFF: 1721d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_TLS_IE; 1722d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1723d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_NTPOFF: 1724d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_TLS_LE; 1725d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1726d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_GOTNTPOFF: 1727d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_TLS_GOTIE; 1728d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1729d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_TLSLDM: 1730d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_TLS_LDM; 1731d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1732d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_DTPOFF: 1733d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_TLS_LDO_32; 1734d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1735d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1736d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1737d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case FK_Data_2: Type = ELF::R_386_16; break; 1738d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case X86::reloc_pcrel_1byte: 1739d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case FK_Data_1: Type = ELF::R_386_8; break; 1740d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1741d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1742d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1743d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1744d3443e99e43945fdb0742177da06a32fa225740dJason W Kim if (RelocNeedsGOT(Modifier)) 1745d3443e99e43945fdb0742177da06a32fa225740dJason W Kim NeedsGOT = true; 1746d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1747d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1748858e7506e1fabe563eb4222c80ad0fad01641becJason W Kim uint64_t RelocOffset = Layout.getFragmentOffset(Fragment) + 17494a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim Fixup.getOffset(); 1750d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 175110907426893019c6b7e59c886e41815d4fe50b19Jason W Kim if (!HasRelocationAddend) Addend = 0; 17524a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim ELFRelocationEntry ERE(RelocOffset, Index, Type, RelocSymbol, Addend); 1753d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Relocations[Fragment->getParent()].push_back(ERE); 17543565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 1755