ELFObjectWriter.cpp revision dff84b03258514463ede477af38f1246b95b0cd0
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" 343565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 353565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming#include <vector> 363565a06ebf44a193a8b333cbeff2ee154298d450Matt Flemingusing namespace llvm; 373565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 38ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindolastatic unsigned GetType(const MCSymbolData &SD) { 39ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola uint32_t Type = (SD.getFlags() & (0xf << ELF_STT_Shift)) >> ELF_STT_Shift; 40ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola assert(Type == ELF::STT_NOTYPE || Type == ELF::STT_OBJECT || 41ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola Type == ELF::STT_FUNC || Type == ELF::STT_SECTION || 42ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola Type == ELF::STT_FILE || Type == ELF::STT_COMMON || 43ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola Type == ELF::STT_TLS); 44ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola return Type; 45ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola} 46ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola 47e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindolastatic unsigned GetBinding(const MCSymbolData &SD) { 48e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola uint32_t Binding = (SD.getFlags() & (0xf << ELF_STB_Shift)) >> ELF_STB_Shift; 49e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola assert(Binding == ELF::STB_LOCAL || Binding == ELF::STB_GLOBAL || 50e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola Binding == ELF::STB_WEAK); 51e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola return Binding; 52e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola} 53e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola 54e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindolastatic void SetBinding(MCSymbolData &SD, unsigned Binding) { 55e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola assert(Binding == ELF::STB_LOCAL || Binding == ELF::STB_GLOBAL || 56e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola Binding == ELF::STB_WEAK); 57e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola uint32_t OtherFlags = SD.getFlags() & ~(0xf << ELF_STB_Shift); 58e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola SD.setFlags(OtherFlags | (Binding << ELF_STB_Shift)); 59e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola} 60e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola 61152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindolastatic unsigned GetVisibility(MCSymbolData &SD) { 62152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola unsigned Visibility = 63152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola (SD.getFlags() & (0xf << ELF_STV_Shift)) >> ELF_STV_Shift; 64152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola assert(Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_INTERNAL || 65152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola Visibility == ELF::STV_HIDDEN || Visibility == ELF::STV_PROTECTED); 66152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola return Visibility; 67152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola} 68152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola 694b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 70a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindolastatic bool RelocNeedsGOT(MCSymbolRefExpr::VariantKind Variant) { 71a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindola switch (Variant) { 725c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola default: 735c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola return false; 74a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindola case MCSymbolRefExpr::VK_GOT: 75a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindola case MCSymbolRefExpr::VK_PLT: 76a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindola case MCSymbolRefExpr::VK_GOTPCREL: 77a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindola case MCSymbolRefExpr::VK_TPOFF: 78a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindola case MCSymbolRefExpr::VK_TLSGD: 79a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindola case MCSymbolRefExpr::VK_GOTTPOFF: 80a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindola case MCSymbolRefExpr::VK_INDNTPOFF: 81a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindola case MCSymbolRefExpr::VK_NTPOFF: 82a0a2f8734cdfc19d44201b791a969bcdda96bb70Rafael Espindola case MCSymbolRefExpr::VK_GOTNTPOFF: 83a264f72d3fb9dec1427480fcf17ef3c746ea723aRafael Espindola case MCSymbolRefExpr::VK_TLSLDM: 840cf15d61b7e3bf53f5a99f58ada37b93bc039559Rafael Espindola case MCSymbolRefExpr::VK_DTPOFF: 85b4d1721eff7b43577e5f2e53f885973fb6c43683Rafael Espindola case MCSymbolRefExpr::VK_TLSLD: 865c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola return true; 875c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola } 885c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola} 895c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola 903565a06ebf44a193a8b333cbeff2ee154298d450Matt Flemingnamespace { 91115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar class ELFObjectWriter : public MCObjectWriter { 92d3443e99e43945fdb0742177da06a32fa225740dJason W Kim protected: 93b188a3789e2fc64ec7088a220c4c428c41d86faaChris Lattner /*static bool isFixupKindX86RIPRel(unsigned Kind) { 943565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming return Kind == X86::reloc_riprel_4byte || 953565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Kind == X86::reloc_riprel_4byte_movq_load; 96b188a3789e2fc64ec7088a220c4c428c41d86faaChris Lattner }*/ 973565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 983565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 993565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// ELFSymbolData - Helper struct for containing some precomputed information 1003565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// on symbols. 1013565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming struct ELFSymbolData { 1023565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCSymbolData *SymbolData; 1033565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint64_t StringIndex; 1043565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint32_t SectionIndex; 1053565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1063565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Support lexicographic sorting. 1073565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming bool operator<(const ELFSymbolData &RHS) const { 108ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola if (GetType(*SymbolData) == ELF::STT_FILE) 109ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola return true; 110ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola if (GetType(*RHS.SymbolData) == ELF::STT_FILE) 111ad49cf586624c400302d17ecc2c2e41ea4346f1aRafael Espindola return false; 11236c6dc22bcaed92f03f7019a0d1cd47ea69e12daBenjamin Kramer return SymbolData->getSymbol().getName() < 11336c6dc22bcaed92f03f7019a0d1cd47ea69e12daBenjamin Kramer RHS.SymbolData->getSymbol().getName(); 1143565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 1153565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming }; 1163565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1173565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// @name Relocation Data 1183565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// @{ 1193565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1203565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming struct ELFRelocationEntry { 1213565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Make these big enough for both 32-bit and 64-bit 1223565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint64_t r_offset; 1238f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola int Index; 1248f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola unsigned Type; 1258f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola const MCSymbol *Symbol; 1263565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint64_t r_addend; 127858e7506e1fabe563eb4222c80ad0fad01641becJason W Kim 1284a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim ELFRelocationEntry() 1294a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim : r_offset(0), Index(0), Type(0), Symbol(0), r_addend(0) {} 1304a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim 13110907426893019c6b7e59c886e41815d4fe50b19Jason W Kim ELFRelocationEntry(uint64_t RelocOffset, int Idx, 13210907426893019c6b7e59c886e41815d4fe50b19Jason W Kim unsigned RelType, const MCSymbol *Sym, 1334a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim uint64_t Addend) 13410907426893019c6b7e59c886e41815d4fe50b19Jason W Kim : r_offset(RelocOffset), Index(Idx), Type(RelType), 13510907426893019c6b7e59c886e41815d4fe50b19Jason W Kim Symbol(Sym), r_addend(Addend) {} 1363565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1373565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Support lexicographic sorting. 1383565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming bool operator<(const ELFRelocationEntry &RE) const { 1393565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming return RE.r_offset < r_offset; 1403565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 1413565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming }; 1423565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1438f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola SmallPtrSet<const MCSymbol *, 16> UsedInReloc; 144484291c27319668ad99cb87def000254357736fbRafael Espindola SmallPtrSet<const MCSymbol *, 16> WeakrefUsedInReloc; 14588182132470527e27231f09b25a885893e528c66Rafael Espindola DenseMap<const MCSymbol *, const MCSymbol *> Renames; 1468f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola 1473565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming llvm::DenseMap<const MCSectionData*, 1483565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming std::vector<ELFRelocationEntry> > Relocations; 1493565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming DenseMap<const MCSection*, uint64_t> SectionStringTableIndex; 1503565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1513565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// @} 1523565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// @name Symbol Table Data 1533565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// @{ 1543565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1553565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming SmallString<256> StringTable; 1563565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming std::vector<ELFSymbolData> LocalSymbolData; 1573565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming std::vector<ELFSymbolData> ExternalSymbolData; 1583565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming std::vector<ELFSymbolData> UndefinedSymbolData; 1593565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1603565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// @} 1613565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1625c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola bool NeedsGOT; 1635c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola 1647be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola bool NeedsSymtabShndx; 1657be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola 1663565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming unsigned Is64Bit : 1; 1673565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1683565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming bool HasRelocationAddend; 1693565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1705baf79edc067a4b17d024cc10324ac88c17e3e43Roman Divacky Triple::OSType OSType; 1715baf79edc067a4b17d024cc10324ac88c17e3e43Roman Divacky 172eecb858ca86fa949c06f819d6127e2ac68d165c8Wesley Peck uint16_t EMachine; 173eecb858ca86fa949c06f819d6127e2ac68d165c8Wesley Peck 1743565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // This holds the symbol table index of the last local symbol. 1753565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming unsigned LastLocalSymbolIndex; 1763565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // This holds the .strtab section index. 1773565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming unsigned StringTableIndex; 1787be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola // This holds the .symtab section index. 1797be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola unsigned SymbolTableIndex; 1803565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1813565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming unsigned ShstrtabIndex; 1823565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1831f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola 1841f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola const MCSymbol *SymbolToReloc(const MCAssembler &Asm, 1851f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola const MCValue &Target, 1861f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola const MCFragment &F) const; 1871f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola 1883565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming public: 189115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar ELFObjectWriter(raw_ostream &_OS, bool _Is64Bit, bool IsLittleEndian, 190115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint16_t _EMachine, bool _HasRelAddend, 191115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar Triple::OSType _OSType) 192115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar : MCObjectWriter(_OS, IsLittleEndian), 193115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar NeedsGOT(false), NeedsSymtabShndx(false), 1945baf79edc067a4b17d024cc10324ac88c17e3e43Roman Divacky Is64Bit(_Is64Bit), HasRelocationAddend(_HasRelAddend), 195eecb858ca86fa949c06f819d6127e2ac68d165c8Wesley Peck OSType(_OSType), EMachine(_EMachine) { 1963565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 197d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 198d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual ~ELFObjectWriter(); 199d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 2003565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming void WriteWord(uint64_t W) { 201b188a3789e2fc64ec7088a220c4c428c41d86faaChris Lattner if (Is64Bit) 202115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar Write64(W); 203b188a3789e2fc64ec7088a220c4c428c41d86faaChris Lattner else 204115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar Write32(W); 2053565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 2063565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 2073565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming void StringLE16(char *buf, uint16_t Value) { 2083565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming buf[0] = char(Value >> 0); 2093565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming buf[1] = char(Value >> 8); 2103565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 2113565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 2123565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming void StringLE32(char *buf, uint32_t Value) { 21336c6dc22bcaed92f03f7019a0d1cd47ea69e12daBenjamin Kramer StringLE16(buf, uint16_t(Value >> 0)); 214c522f6e70b02d161e4bf37023edb20643ee34acfBenjamin Kramer StringLE16(buf + 2, uint16_t(Value >> 16)); 2153565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 2163565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 2173565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming void StringLE64(char *buf, uint64_t Value) { 21836c6dc22bcaed92f03f7019a0d1cd47ea69e12daBenjamin Kramer StringLE32(buf, uint32_t(Value >> 0)); 219c522f6e70b02d161e4bf37023edb20643ee34acfBenjamin Kramer StringLE32(buf + 4, uint32_t(Value >> 32)); 2203565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 2213565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 2223565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming void StringBE16(char *buf ,uint16_t Value) { 2233565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming buf[0] = char(Value >> 8); 2243565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming buf[1] = char(Value >> 0); 2253565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 2263565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 2273565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming void StringBE32(char *buf, uint32_t Value) { 22836c6dc22bcaed92f03f7019a0d1cd47ea69e12daBenjamin Kramer StringBE16(buf, uint16_t(Value >> 16)); 229c522f6e70b02d161e4bf37023edb20643ee34acfBenjamin Kramer StringBE16(buf + 2, uint16_t(Value >> 0)); 2303565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 2313565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 2323565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming void StringBE64(char *buf, uint64_t Value) { 23336c6dc22bcaed92f03f7019a0d1cd47ea69e12daBenjamin Kramer StringBE32(buf, uint32_t(Value >> 32)); 234c522f6e70b02d161e4bf37023edb20643ee34acfBenjamin Kramer StringBE32(buf + 4, uint32_t(Value >> 0)); 2353565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 2363565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 237af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola void String8(MCDataFragment &F, uint8_t Value) { 238af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola char buf[1]; 239af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola buf[0] = Value; 240af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola F.getContents() += StringRef(buf, 1); 241af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola } 242af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola 243af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola void String16(MCDataFragment &F, uint16_t Value) { 244af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola char buf[2]; 245115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar if (isLittleEndian()) 246f8020a3978b9a56074a3a5f9821c63165e37bff7Eli Friedman StringLE16(buf, Value); 2473565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming else 248f8020a3978b9a56074a3a5f9821c63165e37bff7Eli Friedman StringBE16(buf, Value); 249af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola F.getContents() += StringRef(buf, 2); 2503565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 2513565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 252af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola void String32(MCDataFragment &F, uint32_t Value) { 253af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola char buf[4]; 254115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar if (isLittleEndian()) 255f8020a3978b9a56074a3a5f9821c63165e37bff7Eli Friedman StringLE32(buf, Value); 2563565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming else 257f8020a3978b9a56074a3a5f9821c63165e37bff7Eli Friedman StringBE32(buf, Value); 258af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola F.getContents() += StringRef(buf, 4); 2593565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 2603565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 261af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola void String64(MCDataFragment &F, uint64_t Value) { 262af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola char buf[8]; 263115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar if (isLittleEndian()) 264f8020a3978b9a56074a3a5f9821c63165e37bff7Eli Friedman StringLE64(buf, Value); 2653565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming else 266f8020a3978b9a56074a3a5f9821c63165e37bff7Eli Friedman StringBE64(buf, Value); 267af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola F.getContents() += StringRef(buf, 8); 2683565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 2693565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 270d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void WriteHeader(uint64_t SectionDataSize, unsigned NumberOfSections); 2713565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 272d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void WriteSymbolEntry(MCDataFragment *SymtabF, MCDataFragment *ShndxF, 2737be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola uint64_t name, uint8_t info, 2743565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint64_t value, uint64_t size, 2757be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola uint8_t other, uint32_t shndx, 2767be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola bool Reserved); 2773565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 278d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void WriteSymbol(MCDataFragment *SymtabF, MCDataFragment *ShndxF, 2797be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola ELFSymbolData &MSD, 2803565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming const MCAsmLayout &Layout); 2813565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 282bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola typedef DenseMap<const MCSectionELF*, uint32_t> SectionIndexMapTy; 283d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void WriteSymbolTable(MCDataFragment *SymtabF, MCDataFragment *ShndxF, 2847be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola const MCAssembler &Asm, 28571859c640f6a36251aca223fd503c58dc314e296Rafael Espindola const MCAsmLayout &Layout, 2864beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola const SectionIndexMapTy &SectionIndexMap); 2873565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 288d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void RecordRelocation(const MCAssembler &Asm, const MCAsmLayout &Layout, 2893565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming const MCFragment *Fragment, const MCFixup &Fixup, 290d3443e99e43945fdb0742177da06a32fa225740dJason W Kim MCValue Target, uint64_t &FixedValue) { 291d3443e99e43945fdb0742177da06a32fa225740dJason W Kim assert(0 && "RecordRelocation is not specific enough"); 2923285877131ed40d7fe75babf4ee3f4e0d287e4a4Benjamin Kramer } 2933565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 294d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual uint64_t getSymbolIndexInSymbolTable(const MCAssembler &Asm, 2950b6cbfe04cb36872255aff11a41a2b976ceba462Benjamin Kramer const MCSymbol *S); 2963565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 2971f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola // Map from a group section to the signature symbol 2981f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola typedef DenseMap<const MCSectionELF*, const MCSymbol*> GroupMapTy; 2991f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola // Map from a signature symbol to the group section 3001f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola typedef DenseMap<const MCSymbol*, const MCSectionELF*> RevGroupMapTy; 3011f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola 3023565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// ComputeSymbolTable - Compute the symbol table data 3033565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// 3043565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// \param StringTable [out] - The string table data. 3053565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// \param StringIndexMap [out] - Map from symbol names to offsets in the 3063565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming /// string table. 307d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void ComputeSymbolTable(MCAssembler &Asm, 3081f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola const SectionIndexMapTy &SectionIndexMap, 3091f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola RevGroupMapTy RevGroupMap); 310bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola 311d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void ComputeIndexMap(MCAssembler &Asm, 312bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola SectionIndexMapTy &SectionIndexMap); 3133565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 314d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void WriteRelocation(MCAssembler &Asm, MCAsmLayout &Layout, 3153565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming const MCSectionData &SD); 3163565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 317d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void WriteRelocations(MCAssembler &Asm, MCAsmLayout &Layout) { 3183565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming for (MCAssembler::const_iterator it = Asm.begin(), 3193565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming ie = Asm.end(); it != ie; ++it) { 3203565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteRelocation(Asm, Layout, *it); 3213565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 3223565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 3233565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 324d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void CreateMetadataSections(MCAssembler &Asm, MCAsmLayout &Layout, 3254beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola const SectionIndexMapTy &SectionIndexMap); 3263565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 327d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void CreateGroupSections(MCAssembler &Asm, MCAsmLayout &Layout, 3281f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola GroupMapTy &GroupMap, RevGroupMapTy &RevGroupMap); 3292ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola 330d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void ExecutePostLayoutBinding(MCAssembler &Asm); 3313565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 332d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void WriteSecHdrEntry(uint32_t Name, uint32_t Type, uint64_t Flags, 3333565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint64_t Address, uint64_t Offset, 3343565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint64_t Size, uint32_t Link, uint32_t Info, 3353565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint64_t Alignment, uint64_t EntrySize); 3363565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 337d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void WriteRelocationsFragment(const MCAssembler &Asm, MCDataFragment *F, 3383565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming const MCSectionData *SD); 3393565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 340d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual bool IsFixupFullyResolved(const MCAssembler &Asm, 3417070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola const MCValue Target, 3427070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola bool IsPCRel, 3437070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola const MCFragment *DF) const; 3447070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola 345d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void WriteObject(MCAssembler &Asm, const MCAsmLayout &Layout); 346d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void WriteSection(MCAssembler &Asm, 347c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola const SectionIndexMapTy &SectionIndexMap, 3482ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola uint32_t GroupSymbolIndex, 349c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola uint64_t Offset, uint64_t Size, uint64_t Alignment, 350c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola const MCSectionELF &Section); 3513565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming }; 3523565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 353d3443e99e43945fdb0742177da06a32fa225740dJason W Kim //===- X86ELFObjectWriter -------------------------------------------===// 354d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 355d3443e99e43945fdb0742177da06a32fa225740dJason W Kim class X86ELFObjectWriter : public ELFObjectWriter { 356d3443e99e43945fdb0742177da06a32fa225740dJason W Kim public: 357d3443e99e43945fdb0742177da06a32fa225740dJason W Kim X86ELFObjectWriter(raw_ostream &_OS, bool _Is64Bit, bool IsLittleEndian, 358d3443e99e43945fdb0742177da06a32fa225740dJason W Kim uint16_t _EMachine, bool _HasRelAddend, 359d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Triple::OSType _OSType); 3604b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 361d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual ~X86ELFObjectWriter(); 362d3443e99e43945fdb0742177da06a32fa225740dJason W Kim virtual void RecordRelocation(const MCAssembler &Asm, 363d3443e99e43945fdb0742177da06a32fa225740dJason W Kim const MCAsmLayout &Layout, 364d3443e99e43945fdb0742177da06a32fa225740dJason W Kim const MCFragment *Fragment, 365d3443e99e43945fdb0742177da06a32fa225740dJason W Kim const MCFixup &Fixup, MCValue Target, 366d3443e99e43945fdb0742177da06a32fa225740dJason W Kim uint64_t &FixedValue); 3674a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim 36828ef0a5719c41ed9654156aa9db7a656d020d7b5Jason W Kim private: 3694a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim static bool isFixupKindPCRel(unsigned Kind) { 3704a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim switch (Kind) { 3714a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim default: 3724a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim return false; 373e04ed7e45f194f14a7b28bbf3f55694d8e2bcf80Rafael Espindola case FK_PCRel_1: 374e04ed7e45f194f14a7b28bbf3f55694d8e2bcf80Rafael Espindola case FK_PCRel_2: 375e04ed7e45f194f14a7b28bbf3f55694d8e2bcf80Rafael Espindola case FK_PCRel_4: 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 39985fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim protected: 40085fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim // Fixme: pull up to ELFObjectWriter 40185fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup, 40285fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim bool IsPCRel); 40328ef0a5719c41ed9654156aa9db7a656d020d7b5Jason W Kim private: 4044a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim static bool isFixupKindPCRel(unsigned Kind) { 4054a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim switch (Kind) { 4064a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim default: 4074a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim return false; 408e04ed7e45f194f14a7b28bbf3f55694d8e2bcf80Rafael Espindola case FK_PCRel_1: 409e04ed7e45f194f14a7b28bbf3f55694d8e2bcf80Rafael Espindola case FK_PCRel_2: 410e04ed7e45f194f14a7b28bbf3f55694d8e2bcf80Rafael Espindola case FK_PCRel_4: 411dff84b03258514463ede477af38f1246b95b0cd0Jim Grosbach case ARM::fixup_arm_ldst_pcrel_12: 4129d63d90de5e57ad96f467b270544443a9284eb2bOwen Anderson case ARM::fixup_arm_pcrel_10: 413ccbe000e093e53979056ba091291f4427c54bd99Jason W Kim case ARM::fixup_arm_branch: 4144a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim return true; 4154a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim } 4164a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim } 417d3443e99e43945fdb0742177da06a32fa225740dJason W Kim }; 4184b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 4194b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck //===- MBlazeELFObjectWriter -------------------------------------------===// 4204b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 4214b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck class MBlazeELFObjectWriter : public ELFObjectWriter { 4224b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck public: 4234b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck MBlazeELFObjectWriter(raw_ostream &_OS, bool _Is64Bit, bool IsLittleEndian, 4244b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck uint16_t _EMachine, bool _HasRelAddend, 4254b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck Triple::OSType _OSType); 4264b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 4274b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck virtual ~MBlazeELFObjectWriter(); 4284b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck virtual void RecordRelocation(const MCAssembler &Asm, 4294b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck const MCAsmLayout &Layout, 4304b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck const MCFragment *Fragment, 4314b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck const MCFixup &Fixup, MCValue Target, 4324b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck uint64_t &FixedValue); 4334a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim 43428ef0a5719c41ed9654156aa9db7a656d020d7b5Jason W Kim private: 4354a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim static bool isFixupKindPCRel(unsigned Kind) { 4364a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim switch (Kind) { 4374a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim default: 4384a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim return false; 439e04ed7e45f194f14a7b28bbf3f55694d8e2bcf80Rafael Espindola case FK_PCRel_1: 440e04ed7e45f194f14a7b28bbf3f55694d8e2bcf80Rafael Espindola case FK_PCRel_2: 441e04ed7e45f194f14a7b28bbf3f55694d8e2bcf80Rafael Espindola case FK_PCRel_4: 4424a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim return true; 4434a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim } 4444a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim } 4454b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck }; 4463565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 4473565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 448d3443e99e43945fdb0742177da06a32fa225740dJason W KimELFObjectWriter::~ELFObjectWriter() 449d3443e99e43945fdb0742177da06a32fa225740dJason W Kim{} 450d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 4513565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming// Emit the ELF header. 452115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::WriteHeader(uint64_t SectionDataSize, 453115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar unsigned NumberOfSections) { 4543565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // ELF Header 4553565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // ---------- 4563565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // 4573565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Note 4583565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // ---- 4593565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // emitWord method behaves differently for ELF32 and ELF64, writing 4603565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // 4 bytes in the former and 8 in the latter. 4613565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4623565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write8(0x7f); // e_ident[EI_MAG0] 4633565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write8('E'); // e_ident[EI_MAG1] 4643565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write8('L'); // e_ident[EI_MAG2] 4653565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write8('F'); // e_ident[EI_MAG3] 4663565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4673565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write8(Is64Bit ? ELF::ELFCLASS64 : ELF::ELFCLASS32); // e_ident[EI_CLASS] 4683565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4693565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // e_ident[EI_DATA] 470115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar Write8(isLittleEndian() ? ELF::ELFDATA2LSB : ELF::ELFDATA2MSB); 4713565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4723565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write8(ELF::EV_CURRENT); // e_ident[EI_VERSION] 4735baf79edc067a4b17d024cc10324ac88c17e3e43Roman Divacky // e_ident[EI_OSABI] 4745baf79edc067a4b17d024cc10324ac88c17e3e43Roman Divacky switch (OSType) { 4755baf79edc067a4b17d024cc10324ac88c17e3e43Roman Divacky case Triple::FreeBSD: Write8(ELF::ELFOSABI_FREEBSD); break; 4765baf79edc067a4b17d024cc10324ac88c17e3e43Roman Divacky case Triple::Linux: Write8(ELF::ELFOSABI_LINUX); break; 4775baf79edc067a4b17d024cc10324ac88c17e3e43Roman Divacky default: Write8(ELF::ELFOSABI_NONE); break; 4785baf79edc067a4b17d024cc10324ac88c17e3e43Roman Divacky } 4793565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write8(0); // e_ident[EI_ABIVERSION] 4803565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4813565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteZeros(ELF::EI_NIDENT - ELF::EI_PAD); 4823565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4833565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write16(ELF::ET_REL); // e_type 4843565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 485eecb858ca86fa949c06f819d6127e2ac68d165c8Wesley Peck Write16(EMachine); // e_machine = target 4863565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4873565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write32(ELF::EV_CURRENT); // e_version 4883565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteWord(0); // e_entry, no entry point in .o file 4893565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteWord(0); // e_phoff, no program header for .o 490eb97677764beb115c658ac559d3649c6c4068eb9Benjamin Kramer WriteWord(SectionDataSize + (Is64Bit ? sizeof(ELF::Elf64_Ehdr) : 491eb97677764beb115c658ac559d3649c6c4068eb9Benjamin Kramer sizeof(ELF::Elf32_Ehdr))); // e_shoff = sec hdr table off in bytes 4923565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4933565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // FIXME: Make this configurable. 4943565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write32(0); // e_flags = whatever the target wants 4953565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4963565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // e_ehsize = ELF header size 4973565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write16(Is64Bit ? sizeof(ELF::Elf64_Ehdr) : sizeof(ELF::Elf32_Ehdr)); 4983565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 4993565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write16(0); // e_phentsize = prog header entry size 5003565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write16(0); // e_phnum = # prog header entries = 0 5013565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 5023565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // e_shentsize = Section header entry size 5033565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write16(Is64Bit ? sizeof(ELF::Elf64_Shdr) : sizeof(ELF::Elf32_Shdr)); 5043565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 5053565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // e_shnum = # of section header ents 5067be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola if (NumberOfSections >= ELF::SHN_LORESERVE) 5077be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola Write16(0); 5087be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola else 5097be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola Write16(NumberOfSections); 5103565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 5113565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // e_shstrndx = Section # of '.shstrtab' 5127be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola if (NumberOfSections >= ELF::SHN_LORESERVE) 5137be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola Write16(ELF::SHN_XINDEX); 5147be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola else 5157be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola Write16(ShstrtabIndex); 5163565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 5173565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 518115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::WriteSymbolEntry(MCDataFragment *SymtabF, 519115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar MCDataFragment *ShndxF, 520115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint64_t name, 521115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint8_t info, uint64_t value, 522115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint64_t size, uint8_t other, 523115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint32_t shndx, 524115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar bool Reserved) { 5257be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola if (ShndxF) { 5267be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola if (shndx >= ELF::SHN_LORESERVE && !Reserved) 527af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String32(*ShndxF, shndx); 5287be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola else 529af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String32(*ShndxF, 0); 5307be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola } 5317be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola 532af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola uint16_t Index = (shndx >= ELF::SHN_LORESERVE && !Reserved) ? 533af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola uint16_t(ELF::SHN_XINDEX) : shndx; 5343565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 535af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola if (Is64Bit) { 536af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String32(*SymtabF, name); // st_name 537af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String8(*SymtabF, info); // st_info 538af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String8(*SymtabF, other); // st_other 539af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String16(*SymtabF, Index); // st_shndx 540af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String64(*SymtabF, value); // st_value 541af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String64(*SymtabF, size); // st_size 5423565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } else { 543af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String32(*SymtabF, name); // st_name 544af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String32(*SymtabF, value); // st_value 545af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String32(*SymtabF, size); // st_size 546af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String8(*SymtabF, info); // st_info 547af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String8(*SymtabF, other); // st_other 548af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String16(*SymtabF, Index); // st_shndx 5493565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 5503565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 5513565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 5522c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindolastatic uint64_t SymbolValue(MCSymbolData &Data, const MCAsmLayout &Layout) { 5532c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola if (Data.isCommon() && Data.isExternal()) 5542c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola return Data.getCommonAlignment(); 5552c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola 5562c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola const MCSymbol &Symbol = Data.getSymbol(); 5572c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola if (!Symbol.isInSection()) 5582c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola return 0; 5592c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola 5601973d4379250a88938a9358c12d96e96bdc8dedeRafael Espindola if (MCFragment *FF = Data.getFragment()) 5611973d4379250a88938a9358c12d96e96bdc8dedeRafael Espindola return Layout.getSymbolAddress(&Data) - 5621973d4379250a88938a9358c12d96e96bdc8dedeRafael Espindola Layout.getSectionAddress(FF->getParent()); 5632c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola 5642c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola return 0; 5652c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola} 5662c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola 567115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::ExecutePostLayoutBinding(MCAssembler &Asm) { 56888182132470527e27231f09b25a885893e528c66Rafael Espindola // The presence of symbol versions causes undefined symbols and 56988182132470527e27231f09b25a885893e528c66Rafael Espindola // versions declared with @@@ to be renamed. 57088182132470527e27231f09b25a885893e528c66Rafael Espindola 57188182132470527e27231f09b25a885893e528c66Rafael Espindola for (MCAssembler::symbol_iterator it = Asm.symbol_begin(), 57288182132470527e27231f09b25a885893e528c66Rafael Espindola ie = Asm.symbol_end(); it != ie; ++it) { 57388182132470527e27231f09b25a885893e528c66Rafael Espindola const MCSymbol &Alias = it->getSymbol(); 57494ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola const MCSymbol &Symbol = Alias.AliasedSymbol(); 575f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola MCSymbolData &SD = Asm.getSymbolData(Symbol); 576f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola 577f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola // Not an alias. 578f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola if (&Symbol == &Alias) 579f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola continue; 580f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola 58107ee63283cc2b9a4d6c98ecd30d1b721fe3cb29aBenjamin Kramer StringRef AliasName = Alias.getName(); 58288182132470527e27231f09b25a885893e528c66Rafael Espindola size_t Pos = AliasName.find('@'); 58388182132470527e27231f09b25a885893e528c66Rafael Espindola if (Pos == StringRef::npos) 58488182132470527e27231f09b25a885893e528c66Rafael Espindola continue; 58588182132470527e27231f09b25a885893e528c66Rafael Espindola 586f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola // Aliases defined with .symvar copy the binding from the symbol they alias. 587f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola // This is the first place we are able to copy this information. 588f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola it->setExternal(SD.isExternal()); 589f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola SetBinding(*it, GetBinding(SD)); 590f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola 59107ee63283cc2b9a4d6c98ecd30d1b721fe3cb29aBenjamin Kramer StringRef Rest = AliasName.substr(Pos); 59288182132470527e27231f09b25a885893e528c66Rafael Espindola if (!Symbol.isUndefined() && !Rest.startswith("@@@")) 59388182132470527e27231f09b25a885893e528c66Rafael Espindola continue; 59488182132470527e27231f09b25a885893e528c66Rafael Espindola 59583ff4d2b0d6133d48055a27fe25c5d241bca7e9bRafael Espindola // FIXME: produce a better error message. 59683ff4d2b0d6133d48055a27fe25c5d241bca7e9bRafael Espindola if (Symbol.isUndefined() && Rest.startswith("@@") && 59783ff4d2b0d6133d48055a27fe25c5d241bca7e9bRafael Espindola !Rest.startswith("@@@")) 59883ff4d2b0d6133d48055a27fe25c5d241bca7e9bRafael Espindola report_fatal_error("A @@ version cannot be undefined"); 59983ff4d2b0d6133d48055a27fe25c5d241bca7e9bRafael Espindola 60007ee63283cc2b9a4d6c98ecd30d1b721fe3cb29aBenjamin Kramer Renames.insert(std::make_pair(&Symbol, &Alias)); 60188182132470527e27231f09b25a885893e528c66Rafael Espindola } 60288182132470527e27231f09b25a885893e528c66Rafael Espindola} 60388182132470527e27231f09b25a885893e528c66Rafael Espindola 604115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::WriteSymbol(MCDataFragment *SymtabF, 605115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar MCDataFragment *ShndxF, 606115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar ELFSymbolData &MSD, 607115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const MCAsmLayout &Layout) { 608de89b010b0b347cdbd1bc9553a970880a3e721bfRafael Espindola MCSymbolData &OrigData = *MSD.SymbolData; 609de89b010b0b347cdbd1bc9553a970880a3e721bfRafael Espindola MCSymbolData &Data = 61094ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola Layout.getAssembler().getSymbolData(OrigData.getSymbol().AliasedSymbol()); 611152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola 6127be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola bool IsReserved = Data.isCommon() || Data.getSymbol().isAbsolute() || 6137be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola Data.getSymbol().isVariable(); 6147be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola 615152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola uint8_t Binding = GetBinding(OrigData); 616152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola uint8_t Visibility = GetVisibility(OrigData); 617152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola uint8_t Type = GetType(Data); 618152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola 619152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola uint8_t Info = (Binding << ELF_STB_Shift) | (Type << ELF_STT_Shift); 620152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola uint8_t Other = Visibility; 621152c1061e0b4ad379eec5fa38ee0091fc11ff936Rafael Espindola 6222c6ec31df6c6c45ad735892eedab78612ac2847bRafael Espindola uint64_t Value = SymbolValue(Data, Layout); 6233565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint64_t Size = 0; 6243565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming const MCExpr *ESize; 6253565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 626f7c10a3cff61c70efe8e405d9bdc5386e8e3fc0aRafael Espindola assert(!(Data.isCommon() && !Data.isExternal())); 627f7c10a3cff61c70efe8e405d9bdc5386e8e3fc0aRafael Espindola 6283565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming ESize = Data.getSize(); 6293565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming if (Data.getSize()) { 6303565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCValue Res; 6313565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming if (ESize->getKind() == MCExpr::Binary) { 6323565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming const MCBinaryExpr *BE = static_cast<const MCBinaryExpr *>(ESize); 6333565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 6343565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming if (BE->EvaluateAsRelocatable(Res, &Layout)) { 63524f1206c7de0f21d309d27737071ad742d5ddf27Benjamin Kramer assert(!Res.getSymA() || !Res.getSymA()->getSymbol().isDefined()); 63624f1206c7de0f21d309d27737071ad742d5ddf27Benjamin Kramer assert(!Res.getSymB() || !Res.getSymB()->getSymbol().isDefined()); 637f230df9af4012f9510de664b6d62b128e26a5861Rafael Espindola Size = Res.getConstant(); 6383565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 6393565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } else if (ESize->getKind() == MCExpr::Constant) { 640368ae7e4ec0cc0dfc404fa1d07cdf94a7f2a15beBenjamin Kramer Size = static_cast<const MCConstantExpr *>(ESize)->getValue(); 6413565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } else { 6423565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming assert(0 && "Unsupported size expression"); 6433565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 6443565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 6453565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 6463565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Write out the symbol table entry 6477be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola WriteSymbolEntry(SymtabF, ShndxF, MSD.StringIndex, Info, Value, 6487be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola Size, Other, MSD.SectionIndex, IsReserved); 6493565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 6503565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 651115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::WriteSymbolTable(MCDataFragment *SymtabF, 652115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar MCDataFragment *ShndxF, 653115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const MCAssembler &Asm, 654115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const MCAsmLayout &Layout, 6554beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola const SectionIndexMapTy &SectionIndexMap) { 6563565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // The string table must be emitted first because we need the index 6573565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // into the string table for all the symbol names. 6583565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming assert(StringTable.size() && "Missing string table"); 6593565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 6603565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // FIXME: Make sure the start of the symbol table is aligned. 6613565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 6623565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // The first entry is the undefined symbol entry. 6637be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola WriteSymbolEntry(SymtabF, ShndxF, 0, 0, 0, 0, 0, 0, false); 6643565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 6653565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Write the symbol table entries. 6663565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming LastLocalSymbolIndex = LocalSymbolData.size() + 1; 6673565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming for (unsigned i = 0, e = LocalSymbolData.size(); i != e; ++i) { 6683565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming ELFSymbolData &MSD = LocalSymbolData[i]; 6697be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola WriteSymbol(SymtabF, ShndxF, MSD, Layout); 6703565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 6713565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 67271859c640f6a36251aca223fd503c58dc314e296Rafael Espindola // Write out a symbol table entry for each regular section. 6734beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola for (MCAssembler::const_iterator i = Asm.begin(), e = Asm.end(); i != e; 6744beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola ++i) { 675a44fa2473a5f2a13730d44e0aea8897b5656b555Eli Friedman const MCSectionELF &Section = 6764beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola static_cast<const MCSectionELF&>(i->getSection()); 6774beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola if (Section.getType() == ELF::SHT_RELA || 6784beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola Section.getType() == ELF::SHT_REL || 6794beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola Section.getType() == ELF::SHT_STRTAB || 6804beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola Section.getType() == ELF::SHT_SYMTAB) 681a44fa2473a5f2a13730d44e0aea8897b5656b555Eli Friedman continue; 6827be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola WriteSymbolEntry(SymtabF, ShndxF, 0, ELF::STT_SECTION, 0, 0, 6834beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola ELF::STV_DEFAULT, SectionIndexMap.lookup(&Section), false); 684a44fa2473a5f2a13730d44e0aea8897b5656b555Eli Friedman LastLocalSymbolIndex++; 685a44fa2473a5f2a13730d44e0aea8897b5656b555Eli Friedman } 6863565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 6873565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming for (unsigned i = 0, e = ExternalSymbolData.size(); i != e; ++i) { 6883565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming ELFSymbolData &MSD = ExternalSymbolData[i]; 6893565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCSymbolData &Data = *MSD.SymbolData; 6903223f19ff0920ffee686faba3bf74babf580e8a5Rafael Espindola assert(((Data.getFlags() & ELF_STB_Global) || 6913223f19ff0920ffee686faba3bf74babf580e8a5Rafael Espindola (Data.getFlags() & ELF_STB_Weak)) && 6923223f19ff0920ffee686faba3bf74babf580e8a5Rafael Espindola "External symbol requires STB_GLOBAL or STB_WEAK flag"); 6937be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola WriteSymbol(SymtabF, ShndxF, MSD, Layout); 694e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola if (GetBinding(Data) == ELF::STB_LOCAL) 6953565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming LastLocalSymbolIndex++; 6963565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 6973565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 6983565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming for (unsigned i = 0, e = UndefinedSymbolData.size(); i != e; ++i) { 6993565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming ELFSymbolData &MSD = UndefinedSymbolData[i]; 7003565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCSymbolData &Data = *MSD.SymbolData; 7017be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola WriteSymbol(SymtabF, ShndxF, MSD, Layout); 702e15eb4e14cd543b925a837026cbdde9f94393e1cRafael Espindola if (GetBinding(Data) == ELF::STB_LOCAL) 7033565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming LastLocalSymbolIndex++; 7043565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 7053565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 7063565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 7071f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindolaconst MCSymbol *ELFObjectWriter::SymbolToReloc(const MCAssembler &Asm, 7081f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola const MCValue &Target, 7091f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola const MCFragment &F) const { 7101f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola const MCSymbol &Symbol = Target.getSymA()->getSymbol(); 71194ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola const MCSymbol &ASymbol = Symbol.AliasedSymbol(); 71294ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola const MCSymbol *Renamed = Renames.lookup(&Symbol); 71394ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola const MCSymbolData &SD = Asm.getSymbolData(Symbol); 71494ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola 71594ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola if (ASymbol.isUndefined()) { 71694ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola if (Renamed) 71794ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola return Renamed; 71894ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola return &ASymbol; 7191f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola } 7201f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola 72194ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola if (SD.isExternal()) { 72294ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola if (Renamed) 72394ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola return Renamed; 72494ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola return &Symbol; 72594ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola } 7267eae36b38b874f417fa191fc1cfec22c100f164dRafael Espindola 7277eae36b38b874f417fa191fc1cfec22c100f164dRafael Espindola const MCSectionELF &Section = 72894ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola static_cast<const MCSectionELF&>(ASymbol.getSection()); 72925958730dffe0a16f9c251a1fa317799b8419a1fRafael Espindola const SectionKind secKind = Section.getKind(); 7307eae36b38b874f417fa191fc1cfec22c100f164dRafael Espindola 73125958730dffe0a16f9c251a1fa317799b8419a1fRafael Espindola if (secKind.isBSS()) 7321f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola return NULL; 7337eae36b38b874f417fa191fc1cfec22c100f164dRafael Espindola 73425958730dffe0a16f9c251a1fa317799b8419a1fRafael Espindola if (secKind.isThreadLocal()) { 73525958730dffe0a16f9c251a1fa317799b8419a1fRafael Espindola if (Renamed) 73625958730dffe0a16f9c251a1fa317799b8419a1fRafael Espindola return Renamed; 73725958730dffe0a16f9c251a1fa317799b8419a1fRafael Espindola return &Symbol; 73825958730dffe0a16f9c251a1fa317799b8419a1fRafael Espindola } 73925958730dffe0a16f9c251a1fa317799b8419a1fRafael Espindola 7408cecf253e45f144b9a7fd0ace85eeeeb0bebfc83Rafael Espindola MCSymbolRefExpr::VariantKind Kind = Target.getSymA()->getKind(); 7413729d0052bda365d04fee900c6f3d09460f1e108Rafael Espindola const MCSectionELF &Sec2 = 7423729d0052bda365d04fee900c6f3d09460f1e108Rafael Espindola static_cast<const MCSectionELF&>(F.getParent()->getSection()); 7433729d0052bda365d04fee900c6f3d09460f1e108Rafael Espindola 7448cecf253e45f144b9a7fd0ace85eeeeb0bebfc83Rafael Espindola if (&Sec2 != &Section && 745c97f80efc80030c7544a9903c79d2dccd197a0ffRafael Espindola (Kind == MCSymbolRefExpr::VK_PLT || 746c97f80efc80030c7544a9903c79d2dccd197a0ffRafael Espindola Kind == MCSymbolRefExpr::VK_GOTPCREL || 74725958730dffe0a16f9c251a1fa317799b8419a1fRafael Espindola Kind == MCSymbolRefExpr::VK_GOTOFF)) { 74894ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola if (Renamed) 74994ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola return Renamed; 75094ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola return &Symbol; 75194ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola } 7523729d0052bda365d04fee900c6f3d09460f1e108Rafael Espindola 7531f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola if (Section.getFlags() & MCSectionELF::SHF_MERGE) { 75494ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola if (Target.getConstant() == 0) 75594ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola return NULL; 75694ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola if (Renamed) 75794ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola return Renamed; 75894ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola return &Symbol; 7591f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola } 760c97f80efc80030c7544a9903c79d2dccd197a0ffRafael Espindola 7611f52dfe69ee7d0a49a6bfe6dfec6aeb8e416e313Rafael Espindola return NULL; 76273ffea47d20bc9f559b4ce0c60166ee504073832Rafael Espindola} 76373ffea47d20bc9f559b4ce0c60166ee504073832Rafael Espindola 7643565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 7650b6cbfe04cb36872255aff11a41a2b976ceba462Benjamin Krameruint64_t 766115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel DunbarELFObjectWriter::getSymbolIndexInSymbolTable(const MCAssembler &Asm, 767115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const MCSymbol *S) { 7687b83c26051b0474fb5f8b73ba6e74bd4f40324baBenjamin Kramer MCSymbolData &SD = Asm.getSymbolData(*S); 769ab4a7afe98fcd86418bd1672f880b7d3672f4543Rafael Espindola return SD.getIndex(); 7703565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 7713565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 772737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindolastatic bool isInSymtab(const MCAssembler &Asm, const MCSymbolData &Data, 77388182132470527e27231f09b25a885893e528c66Rafael Espindola bool Used, bool Renamed) { 774484291c27319668ad99cb87def000254357736fbRafael Espindola if (Data.getFlags() & ELF_Other_Weakref) 775484291c27319668ad99cb87def000254357736fbRafael Espindola return false; 776484291c27319668ad99cb87def000254357736fbRafael Espindola 777bd70118f163f94a4d77eb036e6f83dd0bfcb6268Rafael Espindola if (Used) 778bd70118f163f94a4d77eb036e6f83dd0bfcb6268Rafael Espindola return true; 779bd70118f163f94a4d77eb036e6f83dd0bfcb6268Rafael Espindola 78088182132470527e27231f09b25a885893e528c66Rafael Espindola if (Renamed) 78188182132470527e27231f09b25a885893e528c66Rafael Espindola return false; 78288182132470527e27231f09b25a885893e528c66Rafael Espindola 783737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola const MCSymbol &Symbol = Data.getSymbol(); 784a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola 785d179886f0595eb3564a9edfdfff79def130d89ccRafael Espindola if (Symbol.getName() == "_GLOBAL_OFFSET_TABLE_") 786d179886f0595eb3564a9edfdfff79def130d89ccRafael Espindola return true; 787d179886f0595eb3564a9edfdfff79def130d89ccRafael Espindola 78894ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola const MCSymbol &A = Symbol.AliasedSymbol(); 789d179886f0595eb3564a9edfdfff79def130d89ccRafael Espindola if (!A.isVariable() && A.isUndefined() && !Data.isCommon()) 790a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola return false; 791a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola 792737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola if (!Asm.isSymbolLinkerVisible(Symbol) && !Symbol.isUndefined()) 793737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola return false; 794737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola 795bd70118f163f94a4d77eb036e6f83dd0bfcb6268Rafael Espindola if (Symbol.isTemporary()) 796737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola return false; 797737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola 798737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola return true; 799737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola} 800737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola 8011f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindolastatic bool isLocal(const MCSymbolData &Data, bool isSignature, 8021f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola bool isUsedInReloc) { 803737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola if (Data.isExternal()) 804737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola return false; 805737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola 806737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola const MCSymbol &Symbol = Data.getSymbol(); 80794ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola const MCSymbol &RefSymbol = Symbol.AliasedSymbol(); 8081f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola 8091f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola if (RefSymbol.isUndefined() && !RefSymbol.isVariable()) { 8101f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola if (isSignature && !isUsedInReloc) 8111f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola return true; 8121f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola 813737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola return false; 8141f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola } 815737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola 816737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola return true; 817737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola} 818737cd213e359c2862253c3a1ee443419566e90b9Rafael Espindola 819115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::ComputeIndexMap(MCAssembler &Asm, 820115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar SectionIndexMapTy &SectionIndexMap) { 821bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola unsigned Index = 1; 822bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola for (MCAssembler::iterator it = Asm.begin(), 823bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola ie = Asm.end(); it != ie; ++it) { 824bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola const MCSectionELF &Section = 825bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola static_cast<const MCSectionELF &>(it->getSection()); 8262ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola if (Section.getType() != ELF::SHT_GROUP) 8272ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola continue; 8282ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola SectionIndexMap[&Section] = Index++; 8292ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola } 8302ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola 8312ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola for (MCAssembler::iterator it = Asm.begin(), 8322ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola ie = Asm.end(); it != ie; ++it) { 8332ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSectionELF &Section = 8342ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola static_cast<const MCSectionELF &>(it->getSection()); 8352ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola if (Section.getType() == ELF::SHT_GROUP) 8362ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola continue; 837bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola SectionIndexMap[&Section] = Index++; 838bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola } 839bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola} 840bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola 841115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::ComputeSymbolTable(MCAssembler &Asm, 8421f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola const SectionIndexMapTy &SectionIndexMap, 8431f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola RevGroupMapTy RevGroupMap) { 8445c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola // FIXME: Is this the correct place to do this? 8455c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola if (NeedsGOT) { 8465c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola llvm::StringRef Name = "_GLOBAL_OFFSET_TABLE_"; 8475c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola MCSymbol *Sym = Asm.getContext().GetOrCreateSymbol(Name); 8485c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola MCSymbolData &Data = Asm.getOrCreateSymbolData(*Sym); 8495c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola Data.setExternal(true); 850f571f9a8fe764d5010970e45203415cb00eab739Rafael Espindola SetBinding(Data, ELF::STB_GLOBAL); 8515c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola } 8525c77c16f311d702a315547c0eb32b7a34a9d55c8Rafael Espindola 8533565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Build section lookup table. 854ab4a7afe98fcd86418bd1672f880b7d3672f4543Rafael Espindola int NumRegularSections = Asm.size(); 8553565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 8563565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Index 0 is always the empty string. 8573565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming StringMap<uint64_t> StringIndexMap; 8583565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming StringTable += '\x00'; 8593565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 860a0949b50dcea35c08b50542091f97275f401529dRafael Espindola // Add the data for the symbols. 8613565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming for (MCAssembler::symbol_iterator it = Asm.symbol_begin(), 8623565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming ie = Asm.symbol_end(); it != ie; ++it) { 8633565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming const MCSymbol &Symbol = it->getSymbol(); 8643565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 865484291c27319668ad99cb87def000254357736fbRafael Espindola bool Used = UsedInReloc.count(&Symbol); 866484291c27319668ad99cb87def000254357736fbRafael Espindola bool WeakrefUsed = WeakrefUsedInReloc.count(&Symbol); 8671f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola bool isSignature = RevGroupMap.count(&Symbol); 8681f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola 8691f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola if (!isInSymtab(Asm, *it, 8701f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola Used || WeakrefUsed || isSignature, 87188182132470527e27231f09b25a885893e528c66Rafael Espindola Renames.count(&Symbol))) 8723565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming continue; 8733565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 8743565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming ELFSymbolData MSD; 8753565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MSD.SymbolData = it; 87694ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola const MCSymbol &RefSymbol = Symbol.AliasedSymbol(); 8773565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 8781f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola // Undefined symbols are global, but this is the first place we 8791f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola // are able to set it. 8801f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola bool Local = isLocal(*it, isSignature, Used); 8811f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola if (!Local && GetBinding(*it) == ELF::STB_LOCAL) { 8821f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola MCSymbolData &SD = Asm.getSymbolData(RefSymbol); 8831f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola SetBinding(*it, ELF::STB_GLOBAL); 8841f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola SetBinding(SD, ELF::STB_GLOBAL); 8851f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola } 8861f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola 887484291c27319668ad99cb87def000254357736fbRafael Espindola if (RefSymbol.isUndefined() && !Used && WeakrefUsed) 888484291c27319668ad99cb87def000254357736fbRafael Espindola SetBinding(*it, ELF::STB_WEAK); 889484291c27319668ad99cb87def000254357736fbRafael Espindola 890f7c10a3cff61c70efe8e405d9bdc5386e8e3fc0aRafael Espindola if (it->isCommon()) { 891a0949b50dcea35c08b50542091f97275f401529dRafael Espindola assert(!Local); 892f7c10a3cff61c70efe8e405d9bdc5386e8e3fc0aRafael Espindola MSD.SectionIndex = ELF::SHN_COMMON; 893bf052ac5d1c8f21075bc675f629709c20791c5f7Rafael Espindola } else if (Symbol.isAbsolute() || RefSymbol.isVariable()) { 894a0949b50dcea35c08b50542091f97275f401529dRafael Espindola MSD.SectionIndex = ELF::SHN_ABS; 89588182132470527e27231f09b25a885893e528c66Rafael Espindola } else if (RefSymbol.isUndefined()) { 8961f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola if (isSignature && !Used) 8971f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola MSD.SectionIndex = SectionIndexMap.lookup(RevGroupMap[&Symbol]); 8981f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola else 8991f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola MSD.SectionIndex = ELF::SHN_UNDEF; 9003565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } else { 901bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola const MCSectionELF &Section = 902bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola static_cast<const MCSectionELF&>(RefSymbol.getSection()); 903bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola MSD.SectionIndex = SectionIndexMap.lookup(&Section); 9047be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola if (MSD.SectionIndex >= ELF::SHN_LORESERVE) 9057be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola NeedsSymtabShndx = true; 9063565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming assert(MSD.SectionIndex && "Invalid section index!"); 9075df0b65e8f5ef55f0b515a0b24879f5d117d6042Rafael Espindola } 9085df0b65e8f5ef55f0b515a0b24879f5d117d6042Rafael Espindola 90988182132470527e27231f09b25a885893e528c66Rafael Espindola // The @@@ in symbol version is replaced with @ in undefined symbols and 91088182132470527e27231f09b25a885893e528c66Rafael Espindola // @@ in defined ones. 91188182132470527e27231f09b25a885893e528c66Rafael Espindola StringRef Name = Symbol.getName(); 9121261a2ff99299946952013f284615a06afa3dc50Benjamin Kramer SmallString<32> Buf; 9131261a2ff99299946952013f284615a06afa3dc50Benjamin Kramer 91488182132470527e27231f09b25a885893e528c66Rafael Espindola size_t Pos = Name.find("@@@"); 91588182132470527e27231f09b25a885893e528c66Rafael Espindola if (Pos != StringRef::npos) { 9161261a2ff99299946952013f284615a06afa3dc50Benjamin Kramer Buf += Name.substr(0, Pos); 9171261a2ff99299946952013f284615a06afa3dc50Benjamin Kramer unsigned Skip = MSD.SectionIndex == ELF::SHN_UNDEF ? 2 : 1; 9181261a2ff99299946952013f284615a06afa3dc50Benjamin Kramer Buf += Name.substr(Pos + Skip); 9191261a2ff99299946952013f284615a06afa3dc50Benjamin Kramer Name = Buf; 92088182132470527e27231f09b25a885893e528c66Rafael Espindola } 92188182132470527e27231f09b25a885893e528c66Rafael Espindola 9221261a2ff99299946952013f284615a06afa3dc50Benjamin Kramer uint64_t &Entry = StringIndexMap[Name]; 923a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola if (!Entry) { 924a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola Entry = StringTable.size(); 9251261a2ff99299946952013f284615a06afa3dc50Benjamin Kramer StringTable += Name; 926a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola StringTable += '\x00'; 9273565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 928a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola MSD.StringIndex = Entry; 929a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola if (MSD.SectionIndex == ELF::SHN_UNDEF) 930a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola UndefinedSymbolData.push_back(MSD); 931a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola else if (Local) 932a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola LocalSymbolData.push_back(MSD); 933a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola else 934a6866969ba3b12901b412bb53ba8c61a9991b8adRafael Espindola ExternalSymbolData.push_back(MSD); 9353565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 9363565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 9373565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Symbols are required to be in lexicographic order. 9383565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming array_pod_sort(LocalSymbolData.begin(), LocalSymbolData.end()); 9393565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming array_pod_sort(ExternalSymbolData.begin(), ExternalSymbolData.end()); 9403565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming array_pod_sort(UndefinedSymbolData.begin(), UndefinedSymbolData.end()); 9413565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 9423565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Set the symbol indices. Local symbols must come before all other 9433565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // symbols with non-local bindings. 944ab4a7afe98fcd86418bd1672f880b7d3672f4543Rafael Espindola unsigned Index = 1; 9453565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming for (unsigned i = 0, e = LocalSymbolData.size(); i != e; ++i) 9463565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming LocalSymbolData[i].SymbolData->setIndex(Index++); 947ab4a7afe98fcd86418bd1672f880b7d3672f4543Rafael Espindola 948ab4a7afe98fcd86418bd1672f880b7d3672f4543Rafael Espindola Index += NumRegularSections; 949ab4a7afe98fcd86418bd1672f880b7d3672f4543Rafael Espindola 9503565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming for (unsigned i = 0, e = ExternalSymbolData.size(); i != e; ++i) 9513565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming ExternalSymbolData[i].SymbolData->setIndex(Index++); 9523565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming for (unsigned i = 0, e = UndefinedSymbolData.size(); i != e; ++i) 9533565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming UndefinedSymbolData[i].SymbolData->setIndex(Index++); 9543565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 9553565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 956115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::WriteRelocation(MCAssembler &Asm, MCAsmLayout &Layout, 957115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const MCSectionData &SD) { 9583565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming if (!Relocations[&SD].empty()) { 9593565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCContext &Ctx = Asm.getContext(); 9604283f4b81e8c1cbf5c7a7b51e949e109ae25ff8cRafael Espindola const MCSectionELF *RelaSection; 9613565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming const MCSectionELF &Section = 9623565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming static_cast<const MCSectionELF&>(SD.getSection()); 9633565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 9643565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming const StringRef SectionName = Section.getSectionName(); 965377a572d9b92304a0fde4371d726721586c1a5bdBenjamin Kramer std::string RelaSectionName = HasRelocationAddend ? ".rela" : ".rel"; 9663565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming RelaSectionName += SectionName; 967299fbe3a5aad8f08c52c488a9b28df70c7595e0dBenjamin Kramer 968299fbe3a5aad8f08c52c488a9b28df70c7595e0dBenjamin Kramer unsigned EntrySize; 969299fbe3a5aad8f08c52c488a9b28df70c7595e0dBenjamin Kramer if (HasRelocationAddend) 970299fbe3a5aad8f08c52c488a9b28df70c7595e0dBenjamin Kramer EntrySize = Is64Bit ? sizeof(ELF::Elf64_Rela) : sizeof(ELF::Elf32_Rela); 971299fbe3a5aad8f08c52c488a9b28df70c7595e0dBenjamin Kramer else 972299fbe3a5aad8f08c52c488a9b28df70c7595e0dBenjamin Kramer EntrySize = Is64Bit ? sizeof(ELF::Elf64_Rel) : sizeof(ELF::Elf32_Rel); 9733565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 974377a572d9b92304a0fde4371d726721586c1a5bdBenjamin Kramer RelaSection = Ctx.getELFSection(RelaSectionName, HasRelocationAddend ? 975377a572d9b92304a0fde4371d726721586c1a5bdBenjamin Kramer ELF::SHT_RELA : ELF::SHT_REL, 0, 9763565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming SectionKind::getReadOnly(), 9772ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola EntrySize, ""); 9783565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 9793565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCSectionData &RelaSD = Asm.getOrCreateSectionData(*RelaSection); 980a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer RelaSD.setAlignment(Is64Bit ? 8 : 4); 9813565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 9823565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCDataFragment *F = new MCDataFragment(&RelaSD); 9833565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 9843565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteRelocationsFragment(Asm, F, &SD); 9853565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 986115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar Asm.AddSectionToTheEnd(*this, RelaSD, Layout); 9873565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 9883565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 9893565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 990115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::WriteSecHdrEntry(uint32_t Name, uint32_t Type, 991115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint64_t Flags, uint64_t Address, 992115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint64_t Offset, uint64_t Size, 993115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint32_t Link, uint32_t Info, 994115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint64_t Alignment, 995115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint64_t EntrySize) { 9963565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write32(Name); // sh_name: index into string table 9973565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write32(Type); // sh_type 9983565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteWord(Flags); // sh_flags 9993565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteWord(Address); // sh_addr 10003565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteWord(Offset); // sh_offset 10013565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteWord(Size); // sh_size 10023565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write32(Link); // sh_link 10033565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming Write32(Info); // sh_info 10043565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteWord(Alignment); // sh_addralign 10053565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming WriteWord(EntrySize); // sh_entsize 10063565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 10073565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1008115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::WriteRelocationsFragment(const MCAssembler &Asm, 1009115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar MCDataFragment *F, 1010115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const MCSectionData *SD) { 10113565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming std::vector<ELFRelocationEntry> &Relocs = Relocations[SD]; 10123565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // sort by the r_offset just like gnu as does 10133565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming array_pod_sort(Relocs.begin(), Relocs.end()); 10143565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 10153565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming for (unsigned i = 0, e = Relocs.size(); i != e; ++i) { 10163565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming ELFRelocationEntry entry = Relocs[e - i - 1]; 10173565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 101812203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola if (!entry.Index) 101912203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola ; 102012203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola else if (entry.Index < 0) 10218f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola entry.Index = getSymbolIndexInSymbolTable(Asm, entry.Symbol); 10228f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola else 102312203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola entry.Index += LocalSymbolData.size(); 10245e492e8d42fa1f2940165a937d3d613c61b57708Benjamin Kramer if (Is64Bit) { 1025af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String64(*F, entry.r_offset); 10265e492e8d42fa1f2940165a937d3d613c61b57708Benjamin Kramer 10278f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola struct ELF::Elf64_Rela ERE64; 10288f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola ERE64.setSymbolAndType(entry.Index, entry.Type); 1029af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String64(*F, ERE64.r_info); 10305e492e8d42fa1f2940165a937d3d613c61b57708Benjamin Kramer 1031af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola if (HasRelocationAddend) 1032af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String64(*F, entry.r_addend); 10335e492e8d42fa1f2940165a937d3d613c61b57708Benjamin Kramer } else { 1034af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String32(*F, entry.r_offset); 10355e492e8d42fa1f2940165a937d3d613c61b57708Benjamin Kramer 10368f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola struct ELF::Elf32_Rela ERE32; 10378f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola ERE32.setSymbolAndType(entry.Index, entry.Type); 1038af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String32(*F, ERE32.r_info); 10395e492e8d42fa1f2940165a937d3d613c61b57708Benjamin Kramer 1040af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola if (HasRelocationAddend) 1041af3d38f70ebba9fec0048c2540dbdf0168d280d2Rafael Espindola String32(*F, entry.r_addend); 10425e492e8d42fa1f2940165a937d3d613c61b57708Benjamin Kramer } 10433565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 10443565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 10453565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1046115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::CreateMetadataSections(MCAssembler &Asm, 1047115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar MCAsmLayout &Layout, 10484beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola const SectionIndexMapTy &SectionIndexMap) { 10493565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCContext &Ctx = Asm.getContext(); 10503565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCDataFragment *F; 10513565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 10523565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming unsigned EntrySize = Is64Bit ? ELF::SYMENTRY_SIZE64 : ELF::SYMENTRY_SIZE32; 10533565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 105438738bf1a847292003a5495f17e42a75d1274bf7Rafael Espindola // We construct .shstrtab, .symtab and .strtab in this order to match gnu as. 10554283f4b81e8c1cbf5c7a7b51e949e109ae25ff8cRafael Espindola const MCSectionELF *ShstrtabSection = 10567be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola Ctx.getELFSection(".shstrtab", ELF::SHT_STRTAB, 0, 10573f2d13c98eb04962bf6fcfdcc6f62789bc820d79Rafael Espindola SectionKind::getReadOnly()); 105871859c640f6a36251aca223fd503c58dc314e296Rafael Espindola MCSectionData &ShstrtabSD = Asm.getOrCreateSectionData(*ShstrtabSection); 105971859c640f6a36251aca223fd503c58dc314e296Rafael Espindola ShstrtabSD.setAlignment(1); 106071859c640f6a36251aca223fd503c58dc314e296Rafael Espindola ShstrtabIndex = Asm.size(); 106171859c640f6a36251aca223fd503c58dc314e296Rafael Espindola 10624283f4b81e8c1cbf5c7a7b51e949e109ae25ff8cRafael Espindola const MCSectionELF *SymtabSection = 10637be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola Ctx.getELFSection(".symtab", ELF::SHT_SYMTAB, 0, 10647be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola SectionKind::getReadOnly(), 10652ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola EntrySize, ""); 10663565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCSectionData &SymtabSD = Asm.getOrCreateSectionData(*SymtabSection); 10673565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming SymtabSD.setAlignment(Is64Bit ? 8 : 4); 10687be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola SymbolTableIndex = Asm.size(); 10697be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola 10707be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola MCSectionData *SymtabShndxSD = NULL; 10717be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola 10727be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola if (NeedsSymtabShndx) { 10734283f4b81e8c1cbf5c7a7b51e949e109ae25ff8cRafael Espindola const MCSectionELF *SymtabShndxSection = 10747be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola Ctx.getELFSection(".symtab_shndx", ELF::SHT_SYMTAB_SHNDX, 0, 10752ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola SectionKind::getReadOnly(), 4, ""); 10767be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola SymtabShndxSD = &Asm.getOrCreateSectionData(*SymtabShndxSection); 10777be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola SymtabShndxSD->setAlignment(4); 10787be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola } 10793565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 10803565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming const MCSection *StrtabSection; 10813565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming StrtabSection = Ctx.getELFSection(".strtab", ELF::SHT_STRTAB, 0, 10823f2d13c98eb04962bf6fcfdcc6f62789bc820d79Rafael Espindola SectionKind::getReadOnly()); 10833565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming MCSectionData &StrtabSD = Asm.getOrCreateSectionData(*StrtabSection); 10843565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming StrtabSD.setAlignment(1); 10853565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming StringTableIndex = Asm.size(); 10863565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1087c3c413f63117896f186fc4385bdaac0578d3613fRafael Espindola WriteRelocations(Asm, Layout); 108871859c640f6a36251aca223fd503c58dc314e296Rafael Espindola 108971859c640f6a36251aca223fd503c58dc314e296Rafael Espindola // Symbol table 109071859c640f6a36251aca223fd503c58dc314e296Rafael Espindola F = new MCDataFragment(&SymtabSD); 10917be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola MCDataFragment *ShndxF = NULL; 10927be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola if (NeedsSymtabShndx) { 10937be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola ShndxF = new MCDataFragment(SymtabShndxSD); 1094115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar Asm.AddSectionToTheEnd(*this, *SymtabShndxSD, Layout); 10957be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola } 10964beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola WriteSymbolTable(F, ShndxF, Asm, Layout, SectionIndexMap); 1097115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar Asm.AddSectionToTheEnd(*this, SymtabSD, Layout); 109871859c640f6a36251aca223fd503c58dc314e296Rafael Espindola 10993565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming F = new MCDataFragment(&StrtabSD); 11003565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming F->getContents().append(StringTable.begin(), StringTable.end()); 1101115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar Asm.AddSectionToTheEnd(*this, StrtabSD, Layout); 11023565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 11033565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming F = new MCDataFragment(&ShstrtabSD); 11043565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 11053565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Section header string table. 11063565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // 11073565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // The first entry of a string table holds a null character so skip 11083565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // section 0. 11093565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint64_t Index = 1; 11103565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming F->getContents() += '\x00'; 11113565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 11122ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola StringMap<uint64_t> SecStringMap; 11133565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming for (MCAssembler::const_iterator it = Asm.begin(), 11143565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming ie = Asm.end(); it != ie; ++it) { 11153565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming const MCSectionELF &Section = 1116368ae7e4ec0cc0dfc404fa1d07cdf94a7f2a15beBenjamin Kramer static_cast<const MCSectionELF&>(it->getSection()); 111751efe7a253190b672519e8388ce5d45f1dcf1a24Rafael Espindola // FIXME: We could merge suffixes like in .text and .rela.text. 11183565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 11192ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola StringRef Name = Section.getSectionName(); 11202ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola if (SecStringMap.count(Name)) { 11212ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola SectionStringTableIndex[&Section] = SecStringMap[Name]; 11222ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola continue; 11232ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola } 11243565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Remember the index into the string table so we can write it 11253565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // into the sh_name field of the section header table. 11262ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola SectionStringTableIndex[&Section] = Index; 11272ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola SecStringMap[Name] = Index; 11283565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 11292ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola Index += Name.size() + 1; 11302ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola F->getContents() += Name; 11313565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming F->getContents() += '\x00'; 11323565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 11333565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1134115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar Asm.AddSectionToTheEnd(*this, ShstrtabSD, Layout); 11357070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola} 11367070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola 1137115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarbool ELFObjectWriter::IsFixupFullyResolved(const MCAssembler &Asm, 1138115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const MCValue Target, 1139115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar bool IsPCRel, 1140115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const MCFragment *DF) const { 11417070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola // If this is a PCrel relocation, find the section this fixup value is 11427070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola // relative to. 11437070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola const MCSection *BaseSection = 0; 11447070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola if (IsPCRel) { 11457070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola BaseSection = &DF->getParent()->getSection(); 11467070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola assert(BaseSection); 11477070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola } 11487070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola 11497070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola const MCSection *SectionA = 0; 11507070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola const MCSymbol *SymbolA = 0; 11517070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola if (const MCSymbolRefExpr *A = Target.getSymA()) { 11522c920850343810535c0cd8720a81eddf7997663aRafael Espindola SymbolA = &A->getSymbol(); 11532c920850343810535c0cd8720a81eddf7997663aRafael Espindola SectionA = &SymbolA->AliasedSymbol().getSection(); 11547070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola } 11557070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola 11567070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola const MCSection *SectionB = 0; 115712203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola const MCSymbol *SymbolB = 0; 11587070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola if (const MCSymbolRefExpr *B = Target.getSymB()) { 115912203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola SymbolB = &B->getSymbol(); 116012203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola SectionB = &SymbolB->AliasedSymbol().getSection(); 11617070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola } 11627070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola 11637070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola if (!BaseSection) 11647070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola return SectionA == SectionB; 11657070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola 116612203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola if (SymbolB) 116712203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola return false; 116812203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola 116912203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola // Absolute address but PCrel instruction, so we need a relocation. 117012203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola if (!SymbolA) 117112203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola return false; 117212203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola 11732c920850343810535c0cd8720a81eddf7997663aRafael Espindola // FIXME: This is in here just to match gnu as output. If the two ends 11742c920850343810535c0cd8720a81eddf7997663aRafael Espindola // are in the same section, there is nothing that the linker can do to 11752c920850343810535c0cd8720a81eddf7997663aRafael Espindola // break it. 11767070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola const MCSymbolData &DataA = Asm.getSymbolData(*SymbolA); 11777070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola if (DataA.isExternal()) 11787070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola return false; 11797070387f08f7dc797b554ed8013cba9f8b74121aRafael Espindola 118012203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola return BaseSection == SectionA; 11813565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 11823565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1183115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::CreateGroupSections(MCAssembler &Asm, 1184115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar MCAsmLayout &Layout, 11851f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola GroupMapTy &GroupMap, 11861f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola RevGroupMapTy &RevGroupMap) { 11872ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola // Build the groups 11882ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola for (MCAssembler::const_iterator it = Asm.begin(), ie = Asm.end(); 11892ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola it != ie; ++it) { 11902ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSectionELF &Section = 11912ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola static_cast<const MCSectionELF&>(it->getSection()); 11922ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola if (!(Section.getFlags() & MCSectionELF::SHF_GROUP)) 11932ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola continue; 11942ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola 11952ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSymbol *SignatureSymbol = Section.getGroup(); 11962ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola Asm.getOrCreateSymbolData(*SignatureSymbol); 11971f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola const MCSectionELF *&Group = RevGroupMap[SignatureSymbol]; 11982ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola if (!Group) { 11992ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola Group = Asm.getContext().CreateELFGroupSection(); 12002ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola MCSectionData &Data = Asm.getOrCreateSectionData(*Group); 12012ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola Data.setAlignment(4); 12022ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola MCDataFragment *F = new MCDataFragment(&Data); 12032ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola String32(*F, ELF::GRP_COMDAT); 12042ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola } 12052ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola GroupMap[Group] = SignatureSymbol; 12062ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola } 12072ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola 12082ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola // Add sections to the groups 12092ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola unsigned Index = 1; 12101f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola unsigned NumGroups = RevGroupMap.size(); 12112ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola for (MCAssembler::const_iterator it = Asm.begin(), ie = Asm.end(); 12122ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola it != ie; ++it, ++Index) { 12132ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSectionELF &Section = 12142ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola static_cast<const MCSectionELF&>(it->getSection()); 12152ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola if (!(Section.getFlags() & MCSectionELF::SHF_GROUP)) 12162ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola continue; 12171f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola const MCSectionELF *Group = RevGroupMap[Section.getGroup()]; 12182ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola MCSectionData &Data = Asm.getOrCreateSectionData(*Group); 12192ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola // FIXME: we could use the previous fragment 12202ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola MCDataFragment *F = new MCDataFragment(&Data); 12212ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola String32(*F, NumGroups + Index); 12222ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola } 12232ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola 12241f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola for (RevGroupMapTy::const_iterator i = RevGroupMap.begin(), 12251f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola e = RevGroupMap.end(); i != e; ++i) { 12262ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSectionELF *Group = i->second; 12272ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola MCSectionData &Data = Asm.getOrCreateSectionData(*Group); 1228115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar Asm.AddSectionToTheEnd(*this, Data, Layout); 12292ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola } 12302ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola} 12312ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola 1232115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::WriteSection(MCAssembler &Asm, 1233115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const SectionIndexMapTy &SectionIndexMap, 1234115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint32_t GroupSymbolIndex, 1235115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint64_t Offset, uint64_t Size, 1236115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint64_t Alignment, 1237115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const MCSectionELF &Section) { 1238c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola uint64_t sh_link = 0; 1239c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola uint64_t sh_info = 0; 1240c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 1241c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola switch(Section.getType()) { 1242c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_DYNAMIC: 1243c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola sh_link = SectionStringTableIndex[&Section]; 1244c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola sh_info = 0; 1245c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola break; 1246c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 1247c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_REL: 1248c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_RELA: { 1249c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola const MCSectionELF *SymtabSection; 1250c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola const MCSectionELF *InfoSection; 1251c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola SymtabSection = Asm.getContext().getELFSection(".symtab", ELF::SHT_SYMTAB, 1252c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 0, 12533f2d13c98eb04962bf6fcfdcc6f62789bc820d79Rafael Espindola SectionKind::getReadOnly()); 1254c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola sh_link = SectionIndexMap.lookup(SymtabSection); 1255c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola assert(sh_link && ".symtab not found"); 1256c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 1257c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola // Remove ".rel" and ".rela" prefixes. 1258c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola unsigned SecNameLen = (Section.getType() == ELF::SHT_REL) ? 4 : 5; 1259c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola StringRef SectionName = Section.getSectionName().substr(SecNameLen); 1260c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 1261c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola InfoSection = Asm.getContext().getELFSection(SectionName, 1262c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola ELF::SHT_PROGBITS, 0, 12633f2d13c98eb04962bf6fcfdcc6f62789bc820d79Rafael Espindola SectionKind::getReadOnly()); 1264c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola sh_info = SectionIndexMap.lookup(InfoSection); 1265c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola break; 1266c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola } 1267c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 1268c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_SYMTAB: 1269c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_DYNSYM: 1270c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola sh_link = StringTableIndex; 1271c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola sh_info = LastLocalSymbolIndex; 1272c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola break; 1273c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 1274c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_SYMTAB_SHNDX: 1275c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola sh_link = SymbolTableIndex; 1276c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola break; 1277c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 1278c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_PROGBITS: 1279c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_STRTAB: 1280c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_NOBITS: 1281c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_NULL: 1282c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola case ELF::SHT_ARM_ATTRIBUTES: 1283c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola // Nothing to do. 1284c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola break; 1285c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 12862ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola case ELF::SHT_GROUP: { 12872ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola sh_link = SymbolTableIndex; 12882ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola sh_info = GroupSymbolIndex; 12892ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola break; 12902ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola } 12912ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola 1292c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola default: 1293c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola assert(0 && "FIXME: sh_type value not supported!"); 1294c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola break; 1295c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola } 1296c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 1297c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola WriteSecHdrEntry(SectionStringTableIndex[&Section], Section.getType(), 1298c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola Section.getFlags(), 0, Offset, Size, sh_link, sh_info, 1299c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola Alignment, Section.getEntrySize()); 1300c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola} 1301c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola 1302115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbarvoid ELFObjectWriter::WriteObject(MCAssembler &Asm, 1303115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar const MCAsmLayout &Layout) { 13042ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola GroupMapTy GroupMap; 13051f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola RevGroupMapTy RevGroupMap; 13061f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola CreateGroupSections(Asm, const_cast<MCAsmLayout&>(Layout), GroupMap, 13071f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola RevGroupMap); 13082ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola 1309bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola SectionIndexMapTy SectionIndexMap; 1310bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola 1311bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola ComputeIndexMap(Asm, SectionIndexMap); 1312bab2a80525956b03b5f9126e1496785493326c37Rafael Espindola 13138f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola // Compute symbol table information. 13141f4f9e3d35a2264d86f97dfb6d1e4ccb434f449bRafael Espindola ComputeSymbolTable(Asm, SectionIndexMap, RevGroupMap); 13158f413fa9c00dbaea000ddfe265ab5edd285ea3abRafael Espindola 13163565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming CreateMetadataSections(const_cast<MCAssembler&>(Asm), 13174beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola const_cast<MCAsmLayout&>(Layout), 13184beee3d06bfebe3f3382893fcebc71d1aa3f290eRafael Espindola SectionIndexMap); 13193565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 13201d739a010d49914eae7b6c415dd6de76ca142030Rafael Espindola // Update to include the metadata sections. 13211d739a010d49914eae7b6c415dd6de76ca142030Rafael Espindola ComputeIndexMap(Asm, SectionIndexMap); 13221d739a010d49914eae7b6c415dd6de76ca142030Rafael Espindola 13233565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Add 1 for the null section. 13243565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming unsigned NumSections = Asm.size() + 1; 1325a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer uint64_t NaturalAlignment = Is64Bit ? 8 : 4; 1326a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer uint64_t HeaderSize = Is64Bit ? sizeof(ELF::Elf64_Ehdr) : sizeof(ELF::Elf32_Ehdr); 1327a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer uint64_t FileOff = HeaderSize; 13283565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 13292ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola std::vector<const MCSectionELF*> Sections; 13302ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola Sections.resize(NumSections); 13312ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola 13322ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola for (SectionIndexMapTy::const_iterator i= 13332ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola SectionIndexMap.begin(), e = SectionIndexMap.end(); i != e; ++i) { 13342ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const std::pair<const MCSectionELF*, uint32_t> &p = *i; 13352ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola Sections[p.second] = p.first; 13362ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola } 13372ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola 13382ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola for (unsigned i = 1; i < NumSections; ++i) { 13392ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSectionELF &Section = *Sections[i]; 13402ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSectionData &SD = Asm.getOrCreateSectionData(Section); 13413565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1342a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer FileOff = RoundUpToAlignment(FileOff, SD.getAlignment()); 1343a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer 13443565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Get the size of the section in the output file (including padding). 13453565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming uint64_t Size = Layout.getSectionFileSize(&SD); 1346a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer 1347a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer FileOff += Size; 13483565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 13493565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1350a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer FileOff = RoundUpToAlignment(FileOff, NaturalAlignment); 1351a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer 13523565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Write out the ELF header ... 1353a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer WriteHeader(FileOff - HeaderSize, NumSections); 1354a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer 1355a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer FileOff = HeaderSize; 13563565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 13573565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // ... then all of the sections ... 13583565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming DenseMap<const MCSection*, uint64_t> SectionOffsetMap; 13593565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 13602ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola for (unsigned i = 1; i < NumSections; ++i) { 13612ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSectionELF &Section = *Sections[i]; 13622ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSectionData &SD = Asm.getOrCreateSectionData(Section); 1363a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer 1364a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer uint64_t Padding = OffsetToAlignment(FileOff, SD.getAlignment()); 1365a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer WriteZeros(Padding); 1366a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer FileOff += Padding; 1367a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer 13683565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Remember the offset into the file for this section. 13692ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola SectionOffsetMap[&Section] = FileOff; 137044cbde85badb60c7078e37e14575c15e671521b1Benjamin Kramer 13713565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming FileOff += Layout.getSectionFileSize(&SD); 13723565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1373115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar Asm.WriteSectionData(&SD, Layout, this); 13743565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 13753565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1376a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer uint64_t Padding = OffsetToAlignment(FileOff, NaturalAlignment); 1377a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer WriteZeros(Padding); 1378a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer FileOff += Padding; 1379a9eadca2fdf48e3228521f25b415b68219bcee31Benjamin Kramer 13803565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // ... and then the section header table. 13813565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Should we align the section header table? 13823565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // 13833565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming // Null section first. 13847be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola uint64_t FirstSectionSize = 13857be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola NumSections >= ELF::SHN_LORESERVE ? NumSections : 0; 13867be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola uint32_t FirstSectionLink = 13877be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola ShstrtabIndex >= ELF::SHN_LORESERVE ? ShstrtabIndex : 0; 13887be2c33193aeada8c0ff3555ea54b930f204132aRafael Espindola WriteSecHdrEntry(0, 0, 0, 0, 0, FirstSectionSize, FirstSectionLink, 0, 0, 0); 13893565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 13902ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola for (unsigned i = 1; i < NumSections; ++i) { 13912ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSectionELF &Section = *Sections[i]; 13922ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola const MCSectionData &SD = Asm.getOrCreateSectionData(Section); 13932ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola uint32_t GroupSymbolIndex; 13942ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola if (Section.getType() != ELF::SHT_GROUP) 13952ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola GroupSymbolIndex = 0; 13962ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola else 13972ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola GroupSymbolIndex = getSymbolIndexInSymbolTable(Asm, GroupMap[&Section]); 13983565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 13992ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola WriteSection(Asm, SectionIndexMap, GroupSymbolIndex, 14002ff9e83a826c1c2ee0f1c6072d3d97d5b10678eeRafael Espindola SectionOffsetMap[&Section], Layout.getSectionSize(&SD), 1401c87a94a94254f45220255938f14321b6ec35fcfeRafael Espindola SD.getAlignment(), Section); 14023565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming } 14033565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 14043565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming 1405115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel DunbarMCObjectWriter *llvm::createELFObjectWriter(raw_ostream &OS, 1406115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar bool Is64Bit, 1407115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar Triple::OSType OSType, 1408115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar uint16_t EMachine, 1409115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar bool IsLittleEndian, 1410115a3dd066c277c5417f4d9b9f642b732b76f4e7Daniel Dunbar bool HasRelocationAddend) { 1411d3443e99e43945fdb0742177da06a32fa225740dJason W Kim switch (EMachine) { 1412d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case ELF::EM_386: 1413d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case ELF::EM_X86_64: 1414d3443e99e43945fdb0742177da06a32fa225740dJason W Kim return new X86ELFObjectWriter(OS, Is64Bit, IsLittleEndian, EMachine, 1415d3443e99e43945fdb0742177da06a32fa225740dJason W Kim HasRelocationAddend, OSType); break; 1416d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case ELF::EM_ARM: 1417d3443e99e43945fdb0742177da06a32fa225740dJason W Kim return new ARMELFObjectWriter(OS, Is64Bit, IsLittleEndian, EMachine, 1418d3443e99e43945fdb0742177da06a32fa225740dJason W Kim HasRelocationAddend, OSType); break; 14194b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck case ELF::EM_MBLAZE: 14204b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck return new MBlazeELFObjectWriter(OS, Is64Bit, IsLittleEndian, EMachine, 14214b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck HasRelocationAddend, OSType); break; 14223285877131ed40d7fe75babf4ee3f4e0d287e4a4Benjamin Kramer default: llvm_unreachable("Unsupported architecture"); break; 1423d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1424d3443e99e43945fdb0742177da06a32fa225740dJason W Kim} 1425d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1426d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1427d3443e99e43945fdb0742177da06a32fa225740dJason W Kim/// START OF SUBCLASSES for ELFObjectWriter 1428d3443e99e43945fdb0742177da06a32fa225740dJason W Kim//===- ARMELFObjectWriter -------------------------------------------===// 1429d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1430d3443e99e43945fdb0742177da06a32fa225740dJason W KimARMELFObjectWriter::ARMELFObjectWriter(raw_ostream &_OS, bool _Is64Bit, 1431d3443e99e43945fdb0742177da06a32fa225740dJason W Kim bool _IsLittleEndian, 1432d3443e99e43945fdb0742177da06a32fa225740dJason W Kim uint16_t _EMachine, bool _HasRelocationAddend, 1433d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Triple::OSType _OSType) 1434d3443e99e43945fdb0742177da06a32fa225740dJason W Kim : ELFObjectWriter(_OS, _Is64Bit, _IsLittleEndian, _EMachine, 1435d3443e99e43945fdb0742177da06a32fa225740dJason W Kim _HasRelocationAddend, _OSType) 1436d3443e99e43945fdb0742177da06a32fa225740dJason W Kim{} 1437d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1438d3443e99e43945fdb0742177da06a32fa225740dJason W KimARMELFObjectWriter::~ARMELFObjectWriter() 1439d3443e99e43945fdb0742177da06a32fa225740dJason W Kim{} 1440d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 144185fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kimunsigned ARMELFObjectWriter::GetRelocType(const MCValue &Target, 144285fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim const MCFixup &Fixup, 144385fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim bool IsPCRel) { 144485fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim MCSymbolRefExpr::VariantKind Modifier = Target.isAbsolute() ? 144585fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim MCSymbolRefExpr::VK_None : Target.getSymA()->getKind(); 144685fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim 144785fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim if (IsPCRel) { 144885fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim switch (Modifier) { 144985fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim default: assert(0 && "Unimplemented Modifier"); 145085fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim case MCSymbolRefExpr::VK_None: break; 145185fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim } 145285fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim switch ((unsigned)Fixup.getKind()) { 145385fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim default: assert(0 && "Unimplemented"); 145485fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim case ARM::fixup_arm_branch: return ELF::R_ARM_CALL; break; 145585fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim } 145685fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim } else { 145785fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim switch ((unsigned)Fixup.getKind()) { 145885fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim default: llvm_unreachable("invalid fixup kind!"); 1459dff84b03258514463ede477af38f1246b95b0cd0Jim Grosbach case ARM::fixup_arm_ldst_pcrel_12: 14609d63d90de5e57ad96f467b270544443a9284eb2bOwen Anderson case ARM::fixup_arm_pcrel_10: 1461dff84b03258514463ede477af38f1246b95b0cd0Jim Grosbach case ARM::fixup_arm_adr_pcrel_12: 146285fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim assert(0 && "Unimplemented"); break; 146385fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim case ARM::fixup_arm_branch: 146485fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim return ELF::R_ARM_CALL; break; 146585fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim case ARM::fixup_arm_movt_hi16: 146685fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim return ELF::R_ARM_MOVT_ABS; break; 146785fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim case ARM::fixup_arm_movw_lo16: 146885fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim return ELF::R_ARM_MOVW_ABS_NC; break; 146985fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim } 147085fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim } 147185fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim 147285fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim if (RelocNeedsGOT(Modifier)) 147385fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim NeedsGOT = true; 147485fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim return -1; 147585fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim} 147685fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim 1477d3443e99e43945fdb0742177da06a32fa225740dJason W Kimvoid ARMELFObjectWriter::RecordRelocation(const MCAssembler &Asm, 1478d3443e99e43945fdb0742177da06a32fa225740dJason W Kim const MCAsmLayout &Layout, 1479d3443e99e43945fdb0742177da06a32fa225740dJason W Kim const MCFragment *Fragment, 1480d3443e99e43945fdb0742177da06a32fa225740dJason W Kim const MCFixup &Fixup, 1481d3443e99e43945fdb0742177da06a32fa225740dJason W Kim MCValue Target, 1482d3443e99e43945fdb0742177da06a32fa225740dJason W Kim uint64_t &FixedValue) { 148385fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim int64_t Addend = 0; 148485fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim int Index = 0; 148585fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim int64_t Value = Target.getConstant(); 148685fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim const MCSymbol *RelocSymbol = NULL; 148785fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim 148885fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim bool IsPCRel = isFixupKindPCRel(Fixup.getKind()); 148985fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim if (!Target.isAbsolute()) { 149085fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim const MCSymbol &Symbol = Target.getSymA()->getSymbol(); 149185fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim const MCSymbol &ASymbol = Symbol.AliasedSymbol(); 149285fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim RelocSymbol = SymbolToReloc(Asm, Target, *Fragment); 149385fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim 149485fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim if (const MCSymbolRefExpr *RefB = Target.getSymB()) { 149585fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim const MCSymbol &SymbolB = RefB->getSymbol(); 149685fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim MCSymbolData &SDB = Asm.getSymbolData(SymbolB); 149785fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim IsPCRel = true; 149885fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim MCSectionData *Sec = Fragment->getParent(); 149985fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim 150085fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim // Offset of the symbol in the section 150185fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim int64_t a = Layout.getSymbolAddress(&SDB) - Layout.getSectionAddress(Sec); 150285fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim 150385fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim // Ofeset of the relocation in the section 150485fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim int64_t b = Layout.getFragmentOffset(Fragment) + Fixup.getOffset(); 150585fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim Value += b - a; 150685fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim } 150785fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim 150885fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim if (!RelocSymbol) { 150985fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim MCSymbolData &SD = Asm.getSymbolData(ASymbol); 151085fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim MCFragment *F = SD.getFragment(); 151185fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim 151285fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim Index = F->getParent()->getOrdinal() + 1; 151385fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim 151485fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim MCSectionData *FSD = F->getParent(); 151585fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim // Offset of the symbol in the section 151685fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim Value += Layout.getSymbolAddress(&SD) - Layout.getSectionAddress(FSD); 151785fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim } else { 151885fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim if (Asm.getSymbolData(Symbol).getFlags() & ELF_Other_Weakref) 151985fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim WeakrefUsedInReloc.insert(RelocSymbol); 152085fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim else 152185fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim UsedInReloc.insert(RelocSymbol); 152285fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim Index = -1; 152385fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim } 152485fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim Addend = Value; 152585fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim // Compensate for the addend on i386. 152685fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim if (Is64Bit) 152785fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim Value = 0; 152885fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim } 152985fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim 153085fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim FixedValue = Value; 153185fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim 153285fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim // determine the type of the relocation 153385fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim unsigned Type = GetRelocType(Target, Fixup, IsPCRel); 153485fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim 153585fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim uint64_t RelocOffset = Layout.getFragmentOffset(Fragment) + 153685fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim Fixup.getOffset(); 153785fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim 153885fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim if (!HasRelocationAddend) Addend = 0; 153985fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim ELFRelocationEntry ERE(RelocOffset, Index, Type, RelocSymbol, Addend); 154085fed5e0c5bc010f967948a4af6b425a5a2f2bd0Jason W Kim Relocations[Fragment->getParent()].push_back(ERE); 1541d3443e99e43945fdb0742177da06a32fa225740dJason W Kim} 1542d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 15434b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck//===- MBlazeELFObjectWriter -------------------------------------------===// 1544d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 15454b04713423c6da988db75c7546baa3db7ddfa119Wesley PeckMBlazeELFObjectWriter::MBlazeELFObjectWriter(raw_ostream &_OS, bool _Is64Bit, 15464b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck bool _IsLittleEndian, 15474b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck uint16_t _EMachine, 15484b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck bool _HasRelocationAddend, 15494b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck Triple::OSType _OSType) 15504b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck : ELFObjectWriter(_OS, _Is64Bit, _IsLittleEndian, _EMachine, 15514b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck _HasRelocationAddend, _OSType) { 15524b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck} 15534b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 15544b04713423c6da988db75c7546baa3db7ddfa119Wesley PeckMBlazeELFObjectWriter::~MBlazeELFObjectWriter() { 15554b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck} 15564b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 15574b04713423c6da988db75c7546baa3db7ddfa119Wesley Peckvoid MBlazeELFObjectWriter::RecordRelocation(const MCAssembler &Asm, 15584b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck const MCAsmLayout &Layout, 15594b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck const MCFragment *Fragment, 15604b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck const MCFixup &Fixup, 15614b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck MCValue Target, 15624b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck uint64_t &FixedValue) { 15634b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck int64_t Addend = 0; 15644b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck int Index = 0; 15654b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck int64_t Value = Target.getConstant(); 15664b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck const MCSymbol &Symbol = Target.getSymA()->getSymbol(); 15674b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck const MCSymbol &ASymbol = Symbol.AliasedSymbol(); 15684b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck const MCSymbol *RelocSymbol = SymbolToReloc(Asm, Target, *Fragment); 15694b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 15704a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim bool IsPCRel = isFixupKindPCRel(Fixup.getKind()); 15714b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck if (!Target.isAbsolute()) { 15724b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck if (const MCSymbolRefExpr *RefB = Target.getSymB()) { 15734b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck const MCSymbol &SymbolB = RefB->getSymbol(); 15744b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck MCSymbolData &SDB = Asm.getSymbolData(SymbolB); 15754b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck IsPCRel = true; 15764b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck MCSectionData *Sec = Fragment->getParent(); 15774b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 15784b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck // Offset of the symbol in the section 15794b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck int64_t a = Layout.getSymbolAddress(&SDB) - Layout.getSectionAddress(Sec); 15804b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 15814b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck // Ofeset of the relocation in the section 15824b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck int64_t b = Layout.getFragmentOffset(Fragment) + Fixup.getOffset(); 15834b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck Value += b - a; 15844b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck } 15854b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 15864b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck if (!RelocSymbol) { 15874b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck MCSymbolData &SD = Asm.getSymbolData(ASymbol); 15884b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck MCFragment *F = SD.getFragment(); 15894b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 15904b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck Index = F->getParent()->getOrdinal(); 15914b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 15924b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck MCSectionData *FSD = F->getParent(); 15934b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck // Offset of the symbol in the section 15944b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck Value += Layout.getSymbolAddress(&SD) - Layout.getSectionAddress(FSD); 15954b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck } else { 15964b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck if (Asm.getSymbolData(Symbol).getFlags() & ELF_Other_Weakref) 15974b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck WeakrefUsedInReloc.insert(RelocSymbol); 15984b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck else 15994b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck UsedInReloc.insert(RelocSymbol); 16004b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck Index = -1; 16014b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck } 16024b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck Addend = Value; 16034b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck } 16044b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 16054b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck FixedValue = Value; 16064b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 16074b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck // determine the type of the relocation 16084b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck unsigned Type; 16094b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck if (IsPCRel) { 16104b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck switch ((unsigned)Fixup.getKind()) { 16114b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck default: 16124b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck llvm_unreachable("Unimplemented"); 1613e04ed7e45f194f14a7b28bbf3f55694d8e2bcf80Rafael Espindola case FK_PCRel_4: 16144b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck Type = ELF::R_MICROBLAZE_64_PCREL; 16154b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck break; 1616e04ed7e45f194f14a7b28bbf3f55694d8e2bcf80Rafael Espindola case FK_PCRel_2: 16174b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck Type = ELF::R_MICROBLAZE_32_PCREL; 16184b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck break; 16194b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck } 16204b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck } else { 16214b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck switch ((unsigned)Fixup.getKind()) { 16224b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck default: llvm_unreachable("invalid fixup kind!"); 16234b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck case FK_Data_4: 16244b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck Type = (RelocSymbol || Addend !=0) ? ELF::R_MICROBLAZE_32 16254b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck : ELF::R_MICROBLAZE_64; 16264b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck break; 16274b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck case FK_Data_2: 16284b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck Type = ELF::R_MICROBLAZE_32; 16294b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck break; 16304b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck } 16314b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck } 16324b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 16334b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck MCSymbolRefExpr::VariantKind Modifier = Target.getSymA()->getKind(); 16344b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck if (RelocNeedsGOT(Modifier)) 16354b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck NeedsGOT = true; 16364b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 1637858e7506e1fabe563eb4222c80ad0fad01641becJason W Kim uint64_t RelocOffset = Layout.getFragmentOffset(Fragment) + 16384a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim Fixup.getOffset(); 16394b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck 164010907426893019c6b7e59c886e41815d4fe50b19Jason W Kim if (!HasRelocationAddend) Addend = 0; 16414a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim ELFRelocationEntry ERE(RelocOffset, Index, Type, RelocSymbol, Addend); 16424b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck Relocations[Fragment->getParent()].push_back(ERE); 16434b04713423c6da988db75c7546baa3db7ddfa119Wesley Peck} 1644d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1645d3443e99e43945fdb0742177da06a32fa225740dJason W Kim//===- X86ELFObjectWriter -------------------------------------------===// 1646d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1647d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1648d3443e99e43945fdb0742177da06a32fa225740dJason W KimX86ELFObjectWriter::X86ELFObjectWriter(raw_ostream &_OS, bool _Is64Bit, 1649d3443e99e43945fdb0742177da06a32fa225740dJason W Kim bool _IsLittleEndian, 1650d3443e99e43945fdb0742177da06a32fa225740dJason W Kim uint16_t _EMachine, bool _HasRelocationAddend, 1651d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Triple::OSType _OSType) 1652d3443e99e43945fdb0742177da06a32fa225740dJason W Kim : ELFObjectWriter(_OS, _Is64Bit, _IsLittleEndian, _EMachine, 1653d3443e99e43945fdb0742177da06a32fa225740dJason W Kim _HasRelocationAddend, _OSType) 1654d3443e99e43945fdb0742177da06a32fa225740dJason W Kim{} 1655d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1656d3443e99e43945fdb0742177da06a32fa225740dJason W KimX86ELFObjectWriter::~X86ELFObjectWriter() 1657d3443e99e43945fdb0742177da06a32fa225740dJason W Kim{} 1658d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1659d3443e99e43945fdb0742177da06a32fa225740dJason W Kimvoid X86ELFObjectWriter::RecordRelocation(const MCAssembler &Asm, 1660d3443e99e43945fdb0742177da06a32fa225740dJason W Kim const MCAsmLayout &Layout, 1661d3443e99e43945fdb0742177da06a32fa225740dJason W Kim const MCFragment *Fragment, 1662d3443e99e43945fdb0742177da06a32fa225740dJason W Kim const MCFixup &Fixup, 1663d3443e99e43945fdb0742177da06a32fa225740dJason W Kim MCValue Target, 1664d3443e99e43945fdb0742177da06a32fa225740dJason W Kim uint64_t &FixedValue) { 1665d3443e99e43945fdb0742177da06a32fa225740dJason W Kim int64_t Addend = 0; 1666d3443e99e43945fdb0742177da06a32fa225740dJason W Kim int Index = 0; 1667d3443e99e43945fdb0742177da06a32fa225740dJason W Kim int64_t Value = Target.getConstant(); 166812203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola const MCSymbol *RelocSymbol = NULL; 1669d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 16704a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim bool IsPCRel = isFixupKindPCRel(Fixup.getKind()); 1671d3443e99e43945fdb0742177da06a32fa225740dJason W Kim if (!Target.isAbsolute()) { 167212203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola const MCSymbol &Symbol = Target.getSymA()->getSymbol(); 167312203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola const MCSymbol &ASymbol = Symbol.AliasedSymbol(); 167412203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola RelocSymbol = SymbolToReloc(Asm, Target, *Fragment); 167512203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola 1676d3443e99e43945fdb0742177da06a32fa225740dJason W Kim if (const MCSymbolRefExpr *RefB = Target.getSymB()) { 1677d3443e99e43945fdb0742177da06a32fa225740dJason W Kim const MCSymbol &SymbolB = RefB->getSymbol(); 1678d3443e99e43945fdb0742177da06a32fa225740dJason W Kim MCSymbolData &SDB = Asm.getSymbolData(SymbolB); 1679d3443e99e43945fdb0742177da06a32fa225740dJason W Kim IsPCRel = true; 1680d3443e99e43945fdb0742177da06a32fa225740dJason W Kim MCSectionData *Sec = Fragment->getParent(); 1681d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1682d3443e99e43945fdb0742177da06a32fa225740dJason W Kim // Offset of the symbol in the section 1683d3443e99e43945fdb0742177da06a32fa225740dJason W Kim int64_t a = Layout.getSymbolAddress(&SDB) - Layout.getSectionAddress(Sec); 1684d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1685d3443e99e43945fdb0742177da06a32fa225740dJason W Kim // Ofeset of the relocation in the section 1686d3443e99e43945fdb0742177da06a32fa225740dJason W Kim int64_t b = Layout.getFragmentOffset(Fragment) + Fixup.getOffset(); 1687d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Value += b - a; 1688d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1689d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1690d3443e99e43945fdb0742177da06a32fa225740dJason W Kim if (!RelocSymbol) { 169194ed5fca3f5ab5acb74e70b8393b837131e7110cRafael Espindola MCSymbolData &SD = Asm.getSymbolData(ASymbol); 1692d3443e99e43945fdb0742177da06a32fa225740dJason W Kim MCFragment *F = SD.getFragment(); 1693d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 169412203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola Index = F->getParent()->getOrdinal() + 1; 1695d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1696d3443e99e43945fdb0742177da06a32fa225740dJason W Kim MCSectionData *FSD = F->getParent(); 1697d3443e99e43945fdb0742177da06a32fa225740dJason W Kim // Offset of the symbol in the section 1698d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Value += Layout.getSymbolAddress(&SD) - Layout.getSectionAddress(FSD); 1699d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } else { 1700d3443e99e43945fdb0742177da06a32fa225740dJason W Kim if (Asm.getSymbolData(Symbol).getFlags() & ELF_Other_Weakref) 1701d3443e99e43945fdb0742177da06a32fa225740dJason W Kim WeakrefUsedInReloc.insert(RelocSymbol); 1702d3443e99e43945fdb0742177da06a32fa225740dJason W Kim else 1703d3443e99e43945fdb0742177da06a32fa225740dJason W Kim UsedInReloc.insert(RelocSymbol); 1704d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Index = -1; 1705d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1706d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Addend = Value; 1707d3443e99e43945fdb0742177da06a32fa225740dJason W Kim // Compensate for the addend on i386. 1708d3443e99e43945fdb0742177da06a32fa225740dJason W Kim if (Is64Bit) 1709d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Value = 0; 1710d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1711d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1712d3443e99e43945fdb0742177da06a32fa225740dJason W Kim FixedValue = Value; 1713d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1714d3443e99e43945fdb0742177da06a32fa225740dJason W Kim // determine the type of the relocation 1715d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 171612203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola MCSymbolRefExpr::VariantKind Modifier = Target.isAbsolute() ? 171712203cc7c3f7392d62556946a10b2f10205ea63dRafael Espindola MCSymbolRefExpr::VK_None : Target.getSymA()->getKind(); 1718d3443e99e43945fdb0742177da06a32fa225740dJason W Kim unsigned Type; 1719d3443e99e43945fdb0742177da06a32fa225740dJason W Kim if (Is64Bit) { 1720d3443e99e43945fdb0742177da06a32fa225740dJason W Kim if (IsPCRel) { 1721d3443e99e43945fdb0742177da06a32fa225740dJason W Kim switch (Modifier) { 1722d3443e99e43945fdb0742177da06a32fa225740dJason W Kim default: 1723d3443e99e43945fdb0742177da06a32fa225740dJason W Kim llvm_unreachable("Unimplemented"); 1724d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_None: 1725d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_X86_64_PC32; 1726d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1727d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_PLT: 1728d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_X86_64_PLT32; 1729d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1730d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_GOTPCREL: 1731d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_X86_64_GOTPCREL; 1732d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1733d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_GOTTPOFF: 1734d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_X86_64_GOTTPOFF; 1735d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1736d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_TLSGD: 1737d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_X86_64_TLSGD; 1738d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1739d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_TLSLD: 1740d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_X86_64_TLSLD; 1741d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1742d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1743d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } else { 1744d3443e99e43945fdb0742177da06a32fa225740dJason W Kim switch ((unsigned)Fixup.getKind()) { 1745d3443e99e43945fdb0742177da06a32fa225740dJason W Kim default: llvm_unreachable("invalid fixup kind!"); 1746d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case FK_Data_8: Type = ELF::R_X86_64_64; break; 1747d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case X86::reloc_signed_4byte: 1748e04ed7e45f194f14a7b28bbf3f55694d8e2bcf80Rafael Espindola case FK_PCRel_4: 1749d3443e99e43945fdb0742177da06a32fa225740dJason W Kim assert(isInt<32>(Target.getConstant())); 1750d3443e99e43945fdb0742177da06a32fa225740dJason W Kim switch (Modifier) { 1751d3443e99e43945fdb0742177da06a32fa225740dJason W Kim default: 1752d3443e99e43945fdb0742177da06a32fa225740dJason W Kim llvm_unreachable("Unimplemented"); 1753d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_None: 1754d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_X86_64_32S; 1755d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1756d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_GOT: 1757d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_X86_64_GOT32; 1758d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1759d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_GOTPCREL: 1760d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_X86_64_GOTPCREL; 1761d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1762d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_TPOFF: 1763d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_X86_64_TPOFF32; 1764d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1765d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_DTPOFF: 1766d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_X86_64_DTPOFF32; 1767d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1768d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1769d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1770d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case FK_Data_4: 1771d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_X86_64_32; 1772d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1773d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case FK_Data_2: Type = ELF::R_X86_64_16; break; 1774e04ed7e45f194f14a7b28bbf3f55694d8e2bcf80Rafael Espindola case FK_PCRel_1: 1775d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case FK_Data_1: Type = ELF::R_X86_64_8; break; 1776d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1777d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1778d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } else { 1779d3443e99e43945fdb0742177da06a32fa225740dJason W Kim if (IsPCRel) { 1780d3443e99e43945fdb0742177da06a32fa225740dJason W Kim switch (Modifier) { 1781d3443e99e43945fdb0742177da06a32fa225740dJason W Kim default: 1782d3443e99e43945fdb0742177da06a32fa225740dJason W Kim llvm_unreachable("Unimplemented"); 1783d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_None: 1784d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_PC32; 1785d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1786d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_PLT: 1787d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_PLT32; 1788d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1789d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1790d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } else { 1791d3443e99e43945fdb0742177da06a32fa225740dJason W Kim switch ((unsigned)Fixup.getKind()) { 1792d3443e99e43945fdb0742177da06a32fa225740dJason W Kim default: llvm_unreachable("invalid fixup kind!"); 1793d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1794d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case X86::reloc_global_offset_table: 1795d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_GOTPC; 1796d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1797d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1798d3443e99e43945fdb0742177da06a32fa225740dJason W Kim // FIXME: Should we avoid selecting reloc_signed_4byte in 32 bit mode 1799d3443e99e43945fdb0742177da06a32fa225740dJason W Kim // instead? 1800d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case X86::reloc_signed_4byte: 1801e04ed7e45f194f14a7b28bbf3f55694d8e2bcf80Rafael Espindola case FK_PCRel_4: 1802d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case FK_Data_4: 1803d3443e99e43945fdb0742177da06a32fa225740dJason W Kim switch (Modifier) { 1804d3443e99e43945fdb0742177da06a32fa225740dJason W Kim default: 1805d3443e99e43945fdb0742177da06a32fa225740dJason W Kim llvm_unreachable("Unimplemented"); 1806d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_None: 1807d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_32; 1808d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1809d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_GOT: 1810d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_GOT32; 1811d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1812d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_GOTOFF: 1813d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_GOTOFF; 1814d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1815d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_TLSGD: 1816d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_TLS_GD; 1817d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1818d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_TPOFF: 1819d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_TLS_LE_32; 1820d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1821d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_INDNTPOFF: 1822d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_TLS_IE; 1823d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1824d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_NTPOFF: 1825d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_TLS_LE; 1826d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1827d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_GOTNTPOFF: 1828d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_TLS_GOTIE; 1829d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1830d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_TLSLDM: 1831d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_TLS_LDM; 1832d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1833d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case MCSymbolRefExpr::VK_DTPOFF: 1834d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Type = ELF::R_386_TLS_LDO_32; 1835d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1836d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1837d3443e99e43945fdb0742177da06a32fa225740dJason W Kim break; 1838d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case FK_Data_2: Type = ELF::R_386_16; break; 1839e04ed7e45f194f14a7b28bbf3f55694d8e2bcf80Rafael Espindola case FK_PCRel_1: 1840d3443e99e43945fdb0742177da06a32fa225740dJason W Kim case FK_Data_1: Type = ELF::R_386_8; break; 1841d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1842d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1843d3443e99e43945fdb0742177da06a32fa225740dJason W Kim } 1844d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1845d3443e99e43945fdb0742177da06a32fa225740dJason W Kim if (RelocNeedsGOT(Modifier)) 1846d3443e99e43945fdb0742177da06a32fa225740dJason W Kim NeedsGOT = true; 1847d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1848d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 1849858e7506e1fabe563eb4222c80ad0fad01641becJason W Kim uint64_t RelocOffset = Layout.getFragmentOffset(Fragment) + 18504a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim Fixup.getOffset(); 1851d3443e99e43945fdb0742177da06a32fa225740dJason W Kim 185210907426893019c6b7e59c886e41815d4fe50b19Jason W Kim if (!HasRelocationAddend) Addend = 0; 18534a511f0be22542a39ed4f24a36cbbd81d293d7ddJason W Kim ELFRelocationEntry ERE(RelocOffset, Index, Type, RelocSymbol, Addend); 1854d3443e99e43945fdb0742177da06a32fa225740dJason W Kim Relocations[Fragment->getParent()].push_back(ERE); 18553565a06ebf44a193a8b333cbeff2ee154298d450Matt Fleming} 1856