MCAssembler.cpp revision cf871e5abff63a53f9e97ff9e37fb7297d0cb847
1fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar//===- lib/MC/MCAssembler.cpp - Assembler Backend Implementation ----------===// 2fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar// 3fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar// The LLVM Compiler Infrastructure 4fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar// 5fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar// This file is distributed under the University of Illinois Open Source 6fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar// License. See LICENSE.TXT for details. 7fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar// 8fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar//===----------------------------------------------------------------------===// 9fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar 100adcd35f78b89bf70eb634b7f9ac2103516ca2b2Daniel Dunbar#define DEBUG_TYPE "assembler" 11fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar#include "llvm/MC/MCAssembler.h" 1218ff2cced7e08ac76d8d5bcff8160a5f9a109cbbDaniel Dunbar#include "llvm/MC/MCAsmLayout.h" 131253a6fa3b0d79dc6ea25f2578f6473219d40047Daniel Dunbar#include "llvm/MC/MCExpr.h" 1453b2338a1d061ad15a858ff0d641431f4d4ac101Daniel Dunbar#include "llvm/MC/MCObjectWriter.h" 151253a6fa3b0d79dc6ea25f2578f6473219d40047Daniel Dunbar#include "llvm/MC/MCSymbol.h" 161253a6fa3b0d79dc6ea25f2578f6473219d40047Daniel Dunbar#include "llvm/MC/MCValue.h" 172df4ceba15c130005967ee9e5fb4aa5568de1b0cDaniel Dunbar#include "llvm/MC/MachObjectWriter.h" 180adcd35f78b89bf70eb634b7f9ac2103516ca2b2Daniel Dunbar#include "llvm/ADT/Statistic.h" 19b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar#include "llvm/ADT/StringExtras.h" 20d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar#include "llvm/ADT/Twine.h" 210705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar#include "llvm/Support/ErrorHandling.h" 22fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar#include "llvm/Support/raw_ostream.h" 23b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar#include "llvm/Support/Debug.h" 24ee0d89245eabf93d89b5fef7ac8707680796826dDaniel Dunbar#include "llvm/Target/TargetRegistry.h" 25df3c8f29691a1e3f9ac4afbf05be52dbc898dae9Daniel Dunbar#include "llvm/Target/TargetAsmBackend.h" 26f6346769b344f9b134f0661e8bd2b4245f6490eaDaniel Dunbar 27f6346769b344f9b134f0661e8bd2b4245f6490eaDaniel Dunbar// FIXME: Gross. 28f6346769b344f9b134f0661e8bd2b4245f6490eaDaniel Dunbar#include "../Target/X86/X86FixupKinds.h" 29f6346769b344f9b134f0661e8bd2b4245f6490eaDaniel Dunbar 3023132b188ba651ba172380cd082cc286df73d440Chris Lattner#include <vector> 31fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbarusing namespace llvm; 32fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar 330adcd35f78b89bf70eb634b7f9ac2103516ca2b2Daniel DunbarSTATISTIC(EmittedFragments, "Number of emitted assembler fragments"); 340adcd35f78b89bf70eb634b7f9ac2103516ca2b2Daniel Dunbar 358f4d146c340c9423271ebd7bb3fd32b880000bc9Daniel Dunbar// FIXME FIXME FIXME: There are number of places in this file where we convert 368f4d146c340c9423271ebd7bb3fd32b880000bc9Daniel Dunbar// what is a 64-bit assembler value used for computation into a value in the 378f4d146c340c9423271ebd7bb3fd32b880000bc9Daniel Dunbar// object file, which may truncate it. We should detect that truncation where 388f4d146c340c9423271ebd7bb3fd32b880000bc9Daniel Dunbar// invalid and report errors back. 398f4d146c340c9423271ebd7bb3fd32b880000bc9Daniel Dunbar 409a7795cbed47159566fd8f57b846fcf14ffb0272Duncan Sandsstatic bool isFixupKindPCRel(unsigned Kind) { 41591047f7149c2e57113c60ed194bc9534a7c1cceDaniel Dunbar switch (Kind) { 42591047f7149c2e57113c60ed194bc9534a7c1cceDaniel Dunbar default: 43591047f7149c2e57113c60ed194bc9534a7c1cceDaniel Dunbar return false; 44591047f7149c2e57113c60ed194bc9534a7c1cceDaniel Dunbar case X86::reloc_pcrel_1byte: 45591047f7149c2e57113c60ed194bc9534a7c1cceDaniel Dunbar case X86::reloc_pcrel_4byte: 46591047f7149c2e57113c60ed194bc9534a7c1cceDaniel Dunbar case X86::reloc_riprel_4byte: 47591047f7149c2e57113c60ed194bc9534a7c1cceDaniel Dunbar return true; 48591047f7149c2e57113c60ed194bc9534a7c1cceDaniel Dunbar } 49591047f7149c2e57113c60ed194bc9534a7c1cceDaniel Dunbar} 50591047f7149c2e57113c60ed194bc9534a7c1cceDaniel Dunbar 51fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar/* *** */ 52fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar 530705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel DunbarMCFragment::MCFragment() : Kind(FragmentType(~0)) { 540705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar} 550705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar 565e835967dd5dda294d0ef3392f4c1d4a2260f532Daniel DunbarMCFragment::MCFragment(FragmentType _Kind, MCSectionData *_Parent) 570705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar : Kind(_Kind), 585e835967dd5dda294d0ef3392f4c1d4a2260f532Daniel Dunbar Parent(_Parent), 590705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar FileSize(~UINT64_C(0)) 60fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar{ 615e835967dd5dda294d0ef3392f4c1d4a2260f532Daniel Dunbar if (Parent) 625e835967dd5dda294d0ef3392f4c1d4a2260f532Daniel Dunbar Parent->getFragmentList().push_back(this); 63fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar} 64fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar 650705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel DunbarMCFragment::~MCFragment() { 660705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar} 670705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar 685e835967dd5dda294d0ef3392f4c1d4a2260f532Daniel Dunbaruint64_t MCFragment::getAddress() const { 695e835967dd5dda294d0ef3392f4c1d4a2260f532Daniel Dunbar assert(getParent() && "Missing Section!"); 705e835967dd5dda294d0ef3392f4c1d4a2260f532Daniel Dunbar return getParent()->getAddress() + Offset; 715e835967dd5dda294d0ef3392f4c1d4a2260f532Daniel Dunbar} 725e835967dd5dda294d0ef3392f4c1d4a2260f532Daniel Dunbar 73fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar/* *** */ 74fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar 7581e400092f55c2eba157172bfc0dd0df8317638dDaniel DunbarMCSectionData::MCSectionData() : Section(0) {} 76fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar 77fb4a6b397665df011348ade24a8e38d2219f095aDaniel DunbarMCSectionData::MCSectionData(const MCSection &_Section, MCAssembler *A) 7881e400092f55c2eba157172bfc0dd0df8317638dDaniel Dunbar : Section(&_Section), 79fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar Alignment(1), 805e835967dd5dda294d0ef3392f4c1d4a2260f532Daniel Dunbar Address(~UINT64_C(0)), 816742e34385bff89b897ef0fc930c4bca9e75ac4aDaniel Dunbar Size(~UINT64_C(0)), 823f6a960f9c9ad27f2ac573020df414e8b8cdda04Daniel Dunbar FileSize(~UINT64_C(0)), 83e1ec617c6abf0b9dc1eecbbfe483bda3bb2b7795Daniel Dunbar HasInstructions(false) 84fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar{ 85fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar if (A) 86fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar A->getSectionList().push_back(this); 87fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar} 88fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar 89fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar/* *** */ 90fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar 91efbb5330b8d383a393c83d2da5d631c98b0bb3fdDaniel DunbarMCSymbolData::MCSymbolData() : Symbol(0) {} 92f3d2ef0c9712381a105118336975adcfbf733db0Daniel Dunbar 93cb579b3338fe8d9e4424b138f597a4696cb89de3Daniel DunbarMCSymbolData::MCSymbolData(const MCSymbol &_Symbol, MCFragment *_Fragment, 94f3d2ef0c9712381a105118336975adcfbf733db0Daniel Dunbar uint64_t _Offset, MCAssembler *A) 95efbb5330b8d383a393c83d2da5d631c98b0bb3fdDaniel Dunbar : Symbol(&_Symbol), Fragment(_Fragment), Offset(_Offset), 968f4d146c340c9423271ebd7bb3fd32b880000bc9Daniel Dunbar IsExternal(false), IsPrivateExtern(false), 978f4d146c340c9423271ebd7bb3fd32b880000bc9Daniel Dunbar CommonSize(0), CommonAlign(0), Flags(0), Index(0) 98f3d2ef0c9712381a105118336975adcfbf733db0Daniel Dunbar{ 99f3d2ef0c9712381a105118336975adcfbf733db0Daniel Dunbar if (A) 100f3d2ef0c9712381a105118336975adcfbf733db0Daniel Dunbar A->getSymbolList().push_back(this); 101f3d2ef0c9712381a105118336975adcfbf733db0Daniel Dunbar} 102f3d2ef0c9712381a105118336975adcfbf733db0Daniel Dunbar 103f3d2ef0c9712381a105118336975adcfbf733db0Daniel Dunbar/* *** */ 104f3d2ef0c9712381a105118336975adcfbf733db0Daniel Dunbar 1051f3e445184e5ca2aa4295c2a77f2a4e0b957fea1Daniel DunbarMCAssembler::MCAssembler(MCContext &_Context, TargetAsmBackend &_Backend, 106cf871e5abff63a53f9e97ff9e37fb7297d0cb847Daniel Dunbar MCCodeEmitter &_Emitter, raw_ostream &_OS) 107cf871e5abff63a53f9e97ff9e37fb7297d0cb847Daniel Dunbar : Context(_Context), Backend(_Backend), Emitter(_Emitter), 108cf871e5abff63a53f9e97ff9e37fb7297d0cb847Daniel Dunbar OS(_OS), SubsectionsViaSymbols(false) 1096009db486e7fba448ccb28dff676c012efade8f0Daniel Dunbar{ 1106009db486e7fba448ccb28dff676c012efade8f0Daniel Dunbar} 111fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar 112fb4a6b397665df011348ade24a8e38d2219f095aDaniel DunbarMCAssembler::~MCAssembler() { 113fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar} 114fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar 115939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbarstatic bool isScatteredFixupFullyResolvedSimple(const MCAssembler &Asm, 116939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar const MCAsmFixup &Fixup, 117939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar const MCDataFragment *DF, 118939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar const MCValue Target, 119939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar const MCSection *BaseSection) { 120939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar // The effective fixup address is 121939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar // addr(atom(A)) + offset(A) 122939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar // - addr(atom(B)) - offset(B) 123939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar // - addr(<base symbol>) + <fixup offset from base symbol> 124939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar // and the offsets are not relocatable, so the fixup is fully resolved when 125939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar // addr(atom(A)) - addr(atom(B)) - addr(<base symbol>)) == 0. 126939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar // 127939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar // The simple (Darwin, except on x86_64) way of dealing with this was to 128939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar // assume that any reference to a temporary symbol *must* be a temporary 129939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar // symbol in the same atom, unless the sections differ. Therefore, any PCrel 130939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar // relocation to a temporary symbol (in the same section) is fully 131939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar // resolved. This also works in conjunction with absolutized .set, which 132939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar // requires the compiler to use .set to absolutize the differences between 133939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar // symbols which the compiler knows to be assembly time constants, so we don't 134939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar // need to worry about consider symbol differences fully resolved. 135939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar 136939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar // Non-relative fixups are only resolved if constant. 137939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar if (!BaseSection) 138939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar return Target.isAbsolute(); 139939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar 140939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar // Otherwise, relative fixups are only resolved if not a difference and the 141939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar // target is a temporary in the same section. 142939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar if (Target.isAbsolute() || Target.getSymB()) 143939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar return false; 144939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar 145939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar const MCSymbol *A = &Target.getSymA()->getSymbol(); 146939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar if (!A->isTemporary() || !A->isInSection() || 147939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar &A->getSection() != BaseSection) 148939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar return false; 149939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar 150939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar return true; 151939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar} 152939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar 153034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbarstatic bool isScatteredFixupFullyResolved(const MCAssembler &Asm, 154034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar const MCAsmFixup &Fixup, 155034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar const MCDataFragment *DF, 156034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar const MCValue Target, 157034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar const MCSymbolData *BaseSymbol) { 158034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar // The effective fixup address is 159034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar // addr(atom(A)) + offset(A) 160034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar // - addr(atom(B)) - offset(B) 161034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar // - addr(BaseSymbol) + <fixup offset from base symbol> 162034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar // and the offsets are not relocatable, so the fixup is fully resolved when 163034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar // addr(atom(A)) - addr(atom(B)) - addr(BaseSymbol) == 0. 164034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar // 165034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar // Note that "false" is almost always conservatively correct (it means we emit 166034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar // a relocation which is unnecessary), except when it would force us to emit a 167034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar // relocation which the target cannot encode. 168034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar 169034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar const MCSymbolData *A_Base = 0, *B_Base = 0; 170034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar if (const MCSymbolRefExpr *A = Target.getSymA()) { 171034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar // Modified symbol references cannot be resolved. 172034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar if (A->getKind() != MCSymbolRefExpr::VK_None) 173034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar return false; 174034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar 175034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar A_Base = Asm.getAtom(&Asm.getSymbolData(A->getSymbol())); 176034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar if (!A_Base) 177034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar return false; 178034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar } 179034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar 180034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar if (const MCSymbolRefExpr *B = Target.getSymB()) { 181034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar // Modified symbol references cannot be resolved. 182034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar if (B->getKind() != MCSymbolRefExpr::VK_None) 183034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar return false; 184034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar 185034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar B_Base = Asm.getAtom(&Asm.getSymbolData(B->getSymbol())); 186034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar if (!B_Base) 187034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar return false; 188034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar } 189034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar 190034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar // If there is no base, A and B have to be the same atom for this fixup to be 191034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar // fully resolved. 192034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar if (!BaseSymbol) 193034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar return A_Base == B_Base; 194034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar 195034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar // Otherwise, B must be missing and A must be the base. 196034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar return !B_Base && BaseSymbol == A_Base; 197034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar} 198034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar 199238698566311e9dba4092dfa6c0bfe253279702eDaniel Dunbarbool MCAssembler::isSymbolLinkerVisible(const MCSymbolData *SD) const { 200238698566311e9dba4092dfa6c0bfe253279702eDaniel Dunbar // Non-temporary labels should always be visible to the linker. 201238698566311e9dba4092dfa6c0bfe253279702eDaniel Dunbar if (!SD->getSymbol().isTemporary()) 202238698566311e9dba4092dfa6c0bfe253279702eDaniel Dunbar return true; 203238698566311e9dba4092dfa6c0bfe253279702eDaniel Dunbar 204238698566311e9dba4092dfa6c0bfe253279702eDaniel Dunbar // Absolute temporary labels are never visible. 205238698566311e9dba4092dfa6c0bfe253279702eDaniel Dunbar if (!SD->getFragment()) 206238698566311e9dba4092dfa6c0bfe253279702eDaniel Dunbar return false; 207238698566311e9dba4092dfa6c0bfe253279702eDaniel Dunbar 208238698566311e9dba4092dfa6c0bfe253279702eDaniel Dunbar // Otherwise, check if the section requires symbols even for temporary labels. 209238698566311e9dba4092dfa6c0bfe253279702eDaniel Dunbar return getBackend().doesSectionRequireSymbols( 210238698566311e9dba4092dfa6c0bfe253279702eDaniel Dunbar SD->getFragment()->getParent()->getSection()); 211238698566311e9dba4092dfa6c0bfe253279702eDaniel Dunbar} 212238698566311e9dba4092dfa6c0bfe253279702eDaniel Dunbar 2138ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbarconst MCSymbolData *MCAssembler::getAtomForAddress(const MCSectionData *Section, 2148ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar uint64_t Address) const { 2158ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar const MCSymbolData *Best = 0; 2168ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar for (MCAssembler::const_symbol_iterator it = symbol_begin(), 2178ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar ie = symbol_end(); it != ie; ++it) { 2188ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar // Ignore non-linker visible symbols. 2198ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar if (!isSymbolLinkerVisible(it)) 2208ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar continue; 2218ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar 2228ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar // Ignore symbols not in the same section. 2238ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar if (!it->getFragment() || it->getFragment()->getParent() != Section) 2248ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar continue; 2258ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar 2268ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar // Otherwise, find the closest symbol preceding this address (ties are 2278ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar // resolved in favor of the last defined symbol). 2288ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar if (it->getAddress() <= Address && 2298ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar (!Best || it->getAddress() >= Best->getAddress())) 2308ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar Best = it; 2318ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar } 2328ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar 2338ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar return Best; 2348ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar} 2358ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar 2368ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbarconst MCSymbolData *MCAssembler::getAtom(const MCSymbolData *SD) const { 2378ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar // Linker visible symbols define atoms. 2388ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar if (isSymbolLinkerVisible(SD)) 2398ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar return SD; 2408ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar 2418ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar // Absolute and undefined symbols have no defining atom. 2428ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar if (!SD->getFragment()) 2438ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar return 0; 2448ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar 2458ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar // Otherwise, search by address. 2468ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar return getAtomForAddress(SD->getFragment()->getParent(), SD->getAddress()); 2478ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar} 2488ad0dccbf2f0c5ecf9fdad93ac0207f6eaabaa1bDaniel Dunbar 249df3c8f29691a1e3f9ac4afbf05be52dbc898dae9Daniel Dunbarbool MCAssembler::EvaluateFixup(const MCAsmLayout &Layout, MCAsmFixup &Fixup, 250df3c8f29691a1e3f9ac4afbf05be52dbc898dae9Daniel Dunbar MCDataFragment *DF, 251df3c8f29691a1e3f9ac4afbf05be52dbc898dae9Daniel Dunbar MCValue &Target, uint64_t &Value) const { 252df3c8f29691a1e3f9ac4afbf05be52dbc898dae9Daniel Dunbar if (!Fixup.Value->EvaluateAsRelocatable(Target, &Layout)) 253df3c8f29691a1e3f9ac4afbf05be52dbc898dae9Daniel Dunbar llvm_report_error("expected relocatable expression"); 254df3c8f29691a1e3f9ac4afbf05be52dbc898dae9Daniel Dunbar 255df3c8f29691a1e3f9ac4afbf05be52dbc898dae9Daniel Dunbar // FIXME: How do non-scattered symbols work in ELF? I presume the linker 256df3c8f29691a1e3f9ac4afbf05be52dbc898dae9Daniel Dunbar // doesn't support small relocations, but then under what criteria does the 257df3c8f29691a1e3f9ac4afbf05be52dbc898dae9Daniel Dunbar // assembler allow symbol differences? 258df3c8f29691a1e3f9ac4afbf05be52dbc898dae9Daniel Dunbar 259df3c8f29691a1e3f9ac4afbf05be52dbc898dae9Daniel Dunbar Value = Target.getConstant(); 260df3c8f29691a1e3f9ac4afbf05be52dbc898dae9Daniel Dunbar 261df3c8f29691a1e3f9ac4afbf05be52dbc898dae9Daniel Dunbar bool IsResolved = true, IsPCRel = isFixupKindPCRel(Fixup.Kind); 2629a1d20042f6a6ec648a3588f9b13264a4570aab0Daniel Dunbar if (const MCSymbolRefExpr *A = Target.getSymA()) { 2639a1d20042f6a6ec648a3588f9b13264a4570aab0Daniel Dunbar if (A->getSymbol().isDefined()) 2649a1d20042f6a6ec648a3588f9b13264a4570aab0Daniel Dunbar Value += getSymbolData(A->getSymbol()).getAddress(); 265df3c8f29691a1e3f9ac4afbf05be52dbc898dae9Daniel Dunbar else 266df3c8f29691a1e3f9ac4afbf05be52dbc898dae9Daniel Dunbar IsResolved = false; 267df3c8f29691a1e3f9ac4afbf05be52dbc898dae9Daniel Dunbar } 2689a1d20042f6a6ec648a3588f9b13264a4570aab0Daniel Dunbar if (const MCSymbolRefExpr *B = Target.getSymB()) { 2699a1d20042f6a6ec648a3588f9b13264a4570aab0Daniel Dunbar if (B->getSymbol().isDefined()) 2709a1d20042f6a6ec648a3588f9b13264a4570aab0Daniel Dunbar Value -= getSymbolData(B->getSymbol()).getAddress(); 271df3c8f29691a1e3f9ac4afbf05be52dbc898dae9Daniel Dunbar else 272df3c8f29691a1e3f9ac4afbf05be52dbc898dae9Daniel Dunbar IsResolved = false; 273939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar } 274df3c8f29691a1e3f9ac4afbf05be52dbc898dae9Daniel Dunbar 275939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar // If we are using scattered symbols, determine whether this value is actually 276939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar // resolved; scattering may cause atoms to move. 277939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar if (IsResolved && getBackend().hasScatteredSymbols()) { 278939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar if (getBackend().hasReliableSymbolDifference()) { 279034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar // If this is a PCrel relocation, find the base atom (identified by its 280034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar // symbol) that the fixup value is relative to. 281034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar const MCSymbolData *BaseSymbol = 0; 282034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar if (IsPCRel) { 283034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar BaseSymbol = getAtomForAddress( 284034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar DF->getParent(), DF->getAddress() + Fixup.Offset); 285034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar if (!BaseSymbol) 286034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar IsResolved = false; 287034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar } 288034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar 289034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar if (IsResolved) 290034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar IsResolved = isScatteredFixupFullyResolved(*this, Fixup, DF, Target, 291034843ac8bca36d14ef9d83b50596354b5f3420fDaniel Dunbar BaseSymbol); 292939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar } else { 293939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar const MCSection *BaseSection = 0; 294939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar if (IsPCRel) 295939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar BaseSection = &DF->getParent()->getSection(); 296939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar 297939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar IsResolved = isScatteredFixupFullyResolvedSimple(*this, Fixup, DF, Target, 298939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar BaseSection); 299939f8d7ca23b95acdd5d1e71a7579ee8d33e7fd6Daniel Dunbar } 300df3c8f29691a1e3f9ac4afbf05be52dbc898dae9Daniel Dunbar } 301df3c8f29691a1e3f9ac4afbf05be52dbc898dae9Daniel Dunbar 302df3c8f29691a1e3f9ac4afbf05be52dbc898dae9Daniel Dunbar if (IsPCRel) 303da3e9f760ce2328f6dfe69663c2b17da02ece2dbDaniel Dunbar Value -= DF->getAddress() + Fixup.Offset; 304df3c8f29691a1e3f9ac4afbf05be52dbc898dae9Daniel Dunbar 305df3c8f29691a1e3f9ac4afbf05be52dbc898dae9Daniel Dunbar return IsResolved; 306df3c8f29691a1e3f9ac4afbf05be52dbc898dae9Daniel Dunbar} 307df3c8f29691a1e3f9ac4afbf05be52dbc898dae9Daniel Dunbar 308edc670f3f2ba629b6803a1a7ed4aa47061afd276Daniel Dunbarvoid MCAssembler::LayoutSection(MCSectionData &SD) { 30918ff2cced7e08ac76d8d5bcff8160a5f9a109cbbDaniel Dunbar MCAsmLayout Layout(*this); 3106742e34385bff89b897ef0fc930c4bca9e75ac4aDaniel Dunbar uint64_t Address = SD.getAddress(); 3110705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar 3120705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar for (MCSectionData::iterator it = SD.begin(), ie = SD.end(); it != ie; ++it) { 3130705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar MCFragment &F = *it; 314d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar 3156742e34385bff89b897ef0fc930c4bca9e75ac4aDaniel Dunbar F.setOffset(Address - SD.getAddress()); 316d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar 317d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar // Evaluate fragment size. 318d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar switch (F.getKind()) { 319d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar case MCFragment::FT_Align: { 320d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar MCAlignFragment &AF = cast<MCAlignFragment>(F); 3217eb85194f2b07bc7ba3f274fc00dc389b77b63bfDaniel Dunbar 322d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar uint64_t Size = OffsetToAlignment(Address, AF.getAlignment()); 3236742e34385bff89b897ef0fc930c4bca9e75ac4aDaniel Dunbar if (Size > AF.getMaxBytesToEmit()) 324d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar AF.setFileSize(0); 325d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar else 3266742e34385bff89b897ef0fc930c4bca9e75ac4aDaniel Dunbar AF.setFileSize(Size); 327d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar break; 328d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar } 329d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar 330d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar case MCFragment::FT_Data: 331a4766d7af91b7e25151b3e97a0831b3615d2abc3Daniel Dunbar case MCFragment::FT_Fill: 332d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar F.setFileSize(F.getMaxFileSize()); 333d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar break; 334d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar 335d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar case MCFragment::FT_Org: { 336d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar MCOrgFragment &OF = cast<MCOrgFragment>(F); 337d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar 33818ff2cced7e08ac76d8d5bcff8160a5f9a109cbbDaniel Dunbar int64_t TargetLocation; 33918ff2cced7e08ac76d8d5bcff8160a5f9a109cbbDaniel Dunbar if (!OF.getOffset().EvaluateAsAbsolute(TargetLocation, &Layout)) 34018ff2cced7e08ac76d8d5bcff8160a5f9a109cbbDaniel Dunbar llvm_report_error("expected assembly-time absolute expression"); 341d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar 342d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar // FIXME: We need a way to communicate this error. 34318ff2cced7e08ac76d8d5bcff8160a5f9a109cbbDaniel Dunbar int64_t Offset = TargetLocation - F.getOffset(); 34418ff2cced7e08ac76d8d5bcff8160a5f9a109cbbDaniel Dunbar if (Offset < 0) 34518ff2cced7e08ac76d8d5bcff8160a5f9a109cbbDaniel Dunbar llvm_report_error("invalid .org offset '" + Twine(TargetLocation) + 34618ff2cced7e08ac76d8d5bcff8160a5f9a109cbbDaniel Dunbar "' (at offset '" + Twine(F.getOffset()) + "'"); 3477eb85194f2b07bc7ba3f274fc00dc389b77b63bfDaniel Dunbar 34818ff2cced7e08ac76d8d5bcff8160a5f9a109cbbDaniel Dunbar F.setFileSize(Offset); 349d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar break; 3507eb85194f2b07bc7ba3f274fc00dc389b77b63bfDaniel Dunbar } 351d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar 352d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar case MCFragment::FT_ZeroFill: { 353d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar MCZeroFillFragment &ZFF = cast<MCZeroFillFragment>(F); 354d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar 355d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar // Align the fragment offset; it is safe to adjust the offset freely since 356d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar // this is only in virtual sections. 35737fad5ce4d81fd459fafe1517d6cd17e7ab49958Daniel Dunbar Address = RoundUpToAlignment(Address, ZFF.getAlignment()); 35837fad5ce4d81fd459fafe1517d6cd17e7ab49958Daniel Dunbar F.setOffset(Address - SD.getAddress()); 359d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar 360d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar // FIXME: This is misnamed. 361d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar F.setFileSize(ZFF.getSize()); 362d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar break; 363d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar } 364d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar } 365d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar 3666742e34385bff89b897ef0fc930c4bca9e75ac4aDaniel Dunbar Address += F.getFileSize(); 3670705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar } 3680705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar 3696742e34385bff89b897ef0fc930c4bca9e75ac4aDaniel Dunbar // Set the section sizes. 3706742e34385bff89b897ef0fc930c4bca9e75ac4aDaniel Dunbar SD.setSize(Address - SD.getAddress()); 371cc5b84c6fba79a798e86ea604e54ca9429273a13Daniel Dunbar if (getBackend().isVirtualSection(SD.getSection())) 372d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar SD.setFileSize(0); 373d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar else 374d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar SD.setFileSize(Address - SD.getAddress()); 3750705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar} 3760705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar 3776e72048add2a6464e038121c6c275da37528aa0aKevin Enderby/// WriteNopData - Write optimal nops to the output file for the \arg Count 3786e72048add2a6464e038121c6c275da37528aa0aKevin Enderby/// bytes. This returns the number of bytes written. It may return 0 if 3796e72048add2a6464e038121c6c275da37528aa0aKevin Enderby/// the \arg Count is more than the maximum optimal nops. 3806e72048add2a6464e038121c6c275da37528aa0aKevin Enderby/// 3816e72048add2a6464e038121c6c275da37528aa0aKevin Enderby/// FIXME this is X86 32-bit specific and should move to a better place. 382bdd9281f356d326155dc2ca5585a708e09e90600Daniel Dunbarstatic uint64_t WriteNopData(uint64_t Count, MCObjectWriter *OW) { 38376687083a5185cedc00fb8bb0d384b814492849aKevin Enderby static const uint8_t Nops[16][16] = { 38476687083a5185cedc00fb8bb0d384b814492849aKevin Enderby // nop 38576687083a5185cedc00fb8bb0d384b814492849aKevin Enderby {0x90}, 38676687083a5185cedc00fb8bb0d384b814492849aKevin Enderby // xchg %ax,%ax 38776687083a5185cedc00fb8bb0d384b814492849aKevin Enderby {0x66, 0x90}, 38876687083a5185cedc00fb8bb0d384b814492849aKevin Enderby // nopl (%[re]ax) 38976687083a5185cedc00fb8bb0d384b814492849aKevin Enderby {0x0f, 0x1f, 0x00}, 39076687083a5185cedc00fb8bb0d384b814492849aKevin Enderby // nopl 0(%[re]ax) 39176687083a5185cedc00fb8bb0d384b814492849aKevin Enderby {0x0f, 0x1f, 0x40, 0x00}, 39276687083a5185cedc00fb8bb0d384b814492849aKevin Enderby // nopl 0(%[re]ax,%[re]ax,1) 39376687083a5185cedc00fb8bb0d384b814492849aKevin Enderby {0x0f, 0x1f, 0x44, 0x00, 0x00}, 39476687083a5185cedc00fb8bb0d384b814492849aKevin Enderby // nopw 0(%[re]ax,%[re]ax,1) 39576687083a5185cedc00fb8bb0d384b814492849aKevin Enderby {0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00}, 39676687083a5185cedc00fb8bb0d384b814492849aKevin Enderby // nopl 0L(%[re]ax) 39776687083a5185cedc00fb8bb0d384b814492849aKevin Enderby {0x0f, 0x1f, 0x80, 0x00, 0x00, 0x00, 0x00}, 39876687083a5185cedc00fb8bb0d384b814492849aKevin Enderby // nopl 0L(%[re]ax,%[re]ax,1) 39976687083a5185cedc00fb8bb0d384b814492849aKevin Enderby {0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00}, 40076687083a5185cedc00fb8bb0d384b814492849aKevin Enderby // nopw 0L(%[re]ax,%[re]ax,1) 40176687083a5185cedc00fb8bb0d384b814492849aKevin Enderby {0x66, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00}, 40276687083a5185cedc00fb8bb0d384b814492849aKevin Enderby // nopw %cs:0L(%[re]ax,%[re]ax,1) 40376687083a5185cedc00fb8bb0d384b814492849aKevin Enderby {0x66, 0x2e, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00}, 40476687083a5185cedc00fb8bb0d384b814492849aKevin Enderby // nopl 0(%[re]ax,%[re]ax,1) 40576687083a5185cedc00fb8bb0d384b814492849aKevin Enderby // nopw 0(%[re]ax,%[re]ax,1) 40676687083a5185cedc00fb8bb0d384b814492849aKevin Enderby {0x0f, 0x1f, 0x44, 0x00, 0x00, 40776687083a5185cedc00fb8bb0d384b814492849aKevin Enderby 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00}, 40876687083a5185cedc00fb8bb0d384b814492849aKevin Enderby // nopw 0(%[re]ax,%[re]ax,1) 40976687083a5185cedc00fb8bb0d384b814492849aKevin Enderby // nopw 0(%[re]ax,%[re]ax,1) 41076687083a5185cedc00fb8bb0d384b814492849aKevin Enderby {0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00, 41176687083a5185cedc00fb8bb0d384b814492849aKevin Enderby 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00}, 41276687083a5185cedc00fb8bb0d384b814492849aKevin Enderby // nopw 0(%[re]ax,%[re]ax,1) 41376687083a5185cedc00fb8bb0d384b814492849aKevin Enderby // nopl 0L(%[re]ax) */ 41476687083a5185cedc00fb8bb0d384b814492849aKevin Enderby {0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00, 41576687083a5185cedc00fb8bb0d384b814492849aKevin Enderby 0x0f, 0x1f, 0x80, 0x00, 0x00, 0x00, 0x00}, 41676687083a5185cedc00fb8bb0d384b814492849aKevin Enderby // nopl 0L(%[re]ax) 41776687083a5185cedc00fb8bb0d384b814492849aKevin Enderby // nopl 0L(%[re]ax) 41876687083a5185cedc00fb8bb0d384b814492849aKevin Enderby {0x0f, 0x1f, 0x80, 0x00, 0x00, 0x00, 0x00, 41976687083a5185cedc00fb8bb0d384b814492849aKevin Enderby 0x0f, 0x1f, 0x80, 0x00, 0x00, 0x00, 0x00}, 42076687083a5185cedc00fb8bb0d384b814492849aKevin Enderby // nopl 0L(%[re]ax) 42176687083a5185cedc00fb8bb0d384b814492849aKevin Enderby // nopl 0L(%[re]ax,%[re]ax,1) 42276687083a5185cedc00fb8bb0d384b814492849aKevin Enderby {0x0f, 0x1f, 0x80, 0x00, 0x00, 0x00, 0x00, 42376687083a5185cedc00fb8bb0d384b814492849aKevin Enderby 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00} 42476687083a5185cedc00fb8bb0d384b814492849aKevin Enderby }; 42576687083a5185cedc00fb8bb0d384b814492849aKevin Enderby 42676687083a5185cedc00fb8bb0d384b814492849aKevin Enderby if (Count > 15) 42776687083a5185cedc00fb8bb0d384b814492849aKevin Enderby return 0; 42876687083a5185cedc00fb8bb0d384b814492849aKevin Enderby 4296e72048add2a6464e038121c6c275da37528aa0aKevin Enderby for (uint64_t i = 0; i < Count; i++) 430bdd9281f356d326155dc2ca5585a708e09e90600Daniel Dunbar OW->Write8(uint8_t(Nops[Count - 1][i])); 4316e72048add2a6464e038121c6c275da37528aa0aKevin Enderby 4326e72048add2a6464e038121c6c275da37528aa0aKevin Enderby return Count; 4336e72048add2a6464e038121c6c275da37528aa0aKevin Enderby} 4346e72048add2a6464e038121c6c275da37528aa0aKevin Enderby 43553b2338a1d061ad15a858ff0d641431f4d4ac101Daniel Dunbar/// WriteFragmentData - Write the \arg F data to the output file. 43653b2338a1d061ad15a858ff0d641431f4d4ac101Daniel Dunbarstatic void WriteFragmentData(const MCFragment &F, MCObjectWriter *OW) { 43753b2338a1d061ad15a858ff0d641431f4d4ac101Daniel Dunbar uint64_t Start = OW->getStream().tell(); 4380705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar (void) Start; 4397eb85194f2b07bc7ba3f274fc00dc389b77b63bfDaniel Dunbar 4400adcd35f78b89bf70eb634b7f9ac2103516ca2b2Daniel Dunbar ++EmittedFragments; 4410adcd35f78b89bf70eb634b7f9ac2103516ca2b2Daniel Dunbar 4420705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar // FIXME: Embed in fragments instead? 4430705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar switch (F.getKind()) { 444d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar case MCFragment::FT_Align: { 445d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar MCAlignFragment &AF = cast<MCAlignFragment>(F); 446d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar uint64_t Count = AF.getFileSize() / AF.getValueSize(); 447d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar 448d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar // FIXME: This error shouldn't actually occur (the front end should emit 449d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar // multiple .align directives to enforce the semantics it wants), but is 450d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar // severe enough that we want to report it. How to handle this? 451d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar if (Count * AF.getValueSize() != AF.getFileSize()) 4527eb85194f2b07bc7ba3f274fc00dc389b77b63bfDaniel Dunbar llvm_report_error("undefined .align directive, value size '" + 4537eb85194f2b07bc7ba3f274fc00dc389b77b63bfDaniel Dunbar Twine(AF.getValueSize()) + 454d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar "' is not a divisor of padding size '" + 455d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar Twine(AF.getFileSize()) + "'"); 456d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar 4576e72048add2a6464e038121c6c275da37528aa0aKevin Enderby // See if we are aligning with nops, and if so do that first to try to fill 4586e72048add2a6464e038121c6c275da37528aa0aKevin Enderby // the Count bytes. Then if that did not fill any bytes or there are any 4596e72048add2a6464e038121c6c275da37528aa0aKevin Enderby // bytes left to fill use the the Value and ValueSize to fill the rest. 4606e72048add2a6464e038121c6c275da37528aa0aKevin Enderby if (AF.getEmitNops()) { 461bdd9281f356d326155dc2ca5585a708e09e90600Daniel Dunbar uint64_t NopByteCount = WriteNopData(Count, OW); 4626e72048add2a6464e038121c6c275da37528aa0aKevin Enderby Count -= NopByteCount; 4636e72048add2a6464e038121c6c275da37528aa0aKevin Enderby } 4646e72048add2a6464e038121c6c275da37528aa0aKevin Enderby 465d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar for (uint64_t i = 0; i != Count; ++i) { 466d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar switch (AF.getValueSize()) { 467d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar default: 468d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar assert(0 && "Invalid size!"); 469bdd9281f356d326155dc2ca5585a708e09e90600Daniel Dunbar case 1: OW->Write8 (uint8_t (AF.getValue())); break; 470bdd9281f356d326155dc2ca5585a708e09e90600Daniel Dunbar case 2: OW->Write16(uint16_t(AF.getValue())); break; 471bdd9281f356d326155dc2ca5585a708e09e90600Daniel Dunbar case 4: OW->Write32(uint32_t(AF.getValue())); break; 472bdd9281f356d326155dc2ca5585a708e09e90600Daniel Dunbar case 8: OW->Write64(uint64_t(AF.getValue())); break; 473d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar } 474d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar } 475d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar break; 476d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar } 4770705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar 4783a30b827a5c9bf0ed8f31177b6e447083ce9afecDaniel Dunbar case MCFragment::FT_Data: { 47953b2338a1d061ad15a858ff0d641431f4d4ac101Daniel Dunbar OW->WriteBytes(cast<MCDataFragment>(F).getContents().str()); 4800705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar break; 4813a30b827a5c9bf0ed8f31177b6e447083ce9afecDaniel Dunbar } 4820705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar 4830705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar case MCFragment::FT_Fill: { 4840705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar MCFillFragment &FF = cast<MCFillFragment>(F); 4850705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar for (uint64_t i = 0, e = FF.getCount(); i != e; ++i) { 4860705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar switch (FF.getValueSize()) { 4870705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar default: 4880705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar assert(0 && "Invalid size!"); 489bdd9281f356d326155dc2ca5585a708e09e90600Daniel Dunbar case 1: OW->Write8 (uint8_t (FF.getValue())); break; 490bdd9281f356d326155dc2ca5585a708e09e90600Daniel Dunbar case 2: OW->Write16(uint16_t(FF.getValue())); break; 491bdd9281f356d326155dc2ca5585a708e09e90600Daniel Dunbar case 4: OW->Write32(uint32_t(FF.getValue())); break; 492bdd9281f356d326155dc2ca5585a708e09e90600Daniel Dunbar case 8: OW->Write64(uint64_t(FF.getValue())); break; 4930705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar } 4940705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar } 4950705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar break; 4960705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar } 4977eb85194f2b07bc7ba3f274fc00dc389b77b63bfDaniel Dunbar 498d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar case MCFragment::FT_Org: { 499d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar MCOrgFragment &OF = cast<MCOrgFragment>(F); 500d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar 501d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar for (uint64_t i = 0, e = OF.getFileSize(); i != e; ++i) 502bdd9281f356d326155dc2ca5585a708e09e90600Daniel Dunbar OW->Write8(uint8_t(OF.getValue())); 503d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar 504d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar break; 505d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar } 506d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar 507d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar case MCFragment::FT_ZeroFill: { 508d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar assert(0 && "Invalid zero fill fragment in concrete section!"); 509d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar break; 510d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar } 5110705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar } 5120705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar 51353b2338a1d061ad15a858ff0d641431f4d4ac101Daniel Dunbar assert(OW->getStream().tell() - Start == F.getFileSize()); 5140705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar} 5150705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar 51653b2338a1d061ad15a858ff0d641431f4d4ac101Daniel Dunbarvoid MCAssembler::WriteSectionData(const MCSectionData *SD, 51753b2338a1d061ad15a858ff0d641431f4d4ac101Daniel Dunbar MCObjectWriter *OW) const { 518d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar // Ignore virtual sections. 519cc5b84c6fba79a798e86ea604e54ca9429273a13Daniel Dunbar if (getBackend().isVirtualSection(SD->getSection())) { 52053b2338a1d061ad15a858ff0d641431f4d4ac101Daniel Dunbar assert(SD->getFileSize() == 0); 521d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar return; 522d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar } 523d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar 52453b2338a1d061ad15a858ff0d641431f4d4ac101Daniel Dunbar uint64_t Start = OW->getStream().tell(); 5250705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar (void) Start; 5267eb85194f2b07bc7ba3f274fc00dc389b77b63bfDaniel Dunbar 52753b2338a1d061ad15a858ff0d641431f4d4ac101Daniel Dunbar for (MCSectionData::const_iterator it = SD->begin(), 52853b2338a1d061ad15a858ff0d641431f4d4ac101Daniel Dunbar ie = SD->end(); it != ie; ++it) 52953b2338a1d061ad15a858ff0d641431f4d4ac101Daniel Dunbar WriteFragmentData(*it, OW); 5300705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar 5316742e34385bff89b897ef0fc930c4bca9e75ac4aDaniel Dunbar // Add section padding. 53253b2338a1d061ad15a858ff0d641431f4d4ac101Daniel Dunbar assert(SD->getFileSize() >= SD->getSize() && "Invalid section sizes!"); 53353b2338a1d061ad15a858ff0d641431f4d4ac101Daniel Dunbar OW->WriteZeros(SD->getFileSize() - SD->getSize()); 5346742e34385bff89b897ef0fc930c4bca9e75ac4aDaniel Dunbar 53553b2338a1d061ad15a858ff0d641431f4d4ac101Daniel Dunbar assert(OW->getStream().tell() - Start == SD->getFileSize()); 5360705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar} 5370705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar 538fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbarvoid MCAssembler::Finish() { 539b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar DEBUG_WITH_TYPE("mc-dump", { 540b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar llvm::errs() << "assembler backend - pre-layout\n--\n"; 541b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar dump(); }); 542b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar 543f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar // Layout until everything fits. 544f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar while (LayoutOnce()) 545f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar continue; 546f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar 547f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar DEBUG_WITH_TYPE("mc-dump", { 548f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar llvm::errs() << "assembler backend - post-layout\n--\n"; 549f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar dump(); }); 550f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar 551ee0d89245eabf93d89b5fef7ac8707680796826dDaniel Dunbar // FIXME: Factor out MCObjectWriter. 552ee0d89245eabf93d89b5fef7ac8707680796826dDaniel Dunbar bool Is64Bit = StringRef(getBackend().getTarget().getName()) == "x86-64"; 553ee0d89245eabf93d89b5fef7ac8707680796826dDaniel Dunbar MachObjectWriter MOW(OS, Is64Bit); 554bacba997782f624d3c43591a913b8f1e3d733a52Daniel Dunbar 555bacba997782f624d3c43591a913b8f1e3d733a52Daniel Dunbar // Allow the object writer a chance to perform post-layout binding (for 556bacba997782f624d3c43591a913b8f1e3d733a52Daniel Dunbar // example, to set the index fields in the symbol data). 557bacba997782f624d3c43591a913b8f1e3d733a52Daniel Dunbar MOW.ExecutePostLayoutBinding(*this); 558bacba997782f624d3c43591a913b8f1e3d733a52Daniel Dunbar 559b1e98945e4b107eb3f2ac1b54706c49864842dc4Daniel Dunbar // Evaluate and apply the fixups, generating relocation entries as necessary. 560bdd9281f356d326155dc2ca5585a708e09e90600Daniel Dunbar // 561bdd9281f356d326155dc2ca5585a708e09e90600Daniel Dunbar // FIXME: Share layout object. 562b1e98945e4b107eb3f2ac1b54706c49864842dc4Daniel Dunbar MCAsmLayout Layout(*this); 563b1e98945e4b107eb3f2ac1b54706c49864842dc4Daniel Dunbar for (MCAssembler::iterator it = begin(), ie = end(); it != ie; ++it) { 564b1e98945e4b107eb3f2ac1b54706c49864842dc4Daniel Dunbar for (MCSectionData::iterator it2 = it->begin(), 565b1e98945e4b107eb3f2ac1b54706c49864842dc4Daniel Dunbar ie2 = it->end(); it2 != ie2; ++it2) { 566b1e98945e4b107eb3f2ac1b54706c49864842dc4Daniel Dunbar MCDataFragment *DF = dyn_cast<MCDataFragment>(it2); 567b1e98945e4b107eb3f2ac1b54706c49864842dc4Daniel Dunbar if (!DF) 568b1e98945e4b107eb3f2ac1b54706c49864842dc4Daniel Dunbar continue; 569b1e98945e4b107eb3f2ac1b54706c49864842dc4Daniel Dunbar 570b1e98945e4b107eb3f2ac1b54706c49864842dc4Daniel Dunbar for (MCDataFragment::fixup_iterator it3 = DF->fixup_begin(), 571b1e98945e4b107eb3f2ac1b54706c49864842dc4Daniel Dunbar ie3 = DF->fixup_end(); it3 != ie3; ++it3) { 572b1e98945e4b107eb3f2ac1b54706c49864842dc4Daniel Dunbar MCAsmFixup &Fixup = *it3; 573b1e98945e4b107eb3f2ac1b54706c49864842dc4Daniel Dunbar 574b1e98945e4b107eb3f2ac1b54706c49864842dc4Daniel Dunbar // Evaluate the fixup. 575b1e98945e4b107eb3f2ac1b54706c49864842dc4Daniel Dunbar MCValue Target; 576b1e98945e4b107eb3f2ac1b54706c49864842dc4Daniel Dunbar uint64_t FixedValue; 577b1e98945e4b107eb3f2ac1b54706c49864842dc4Daniel Dunbar if (!EvaluateFixup(Layout, Fixup, DF, Target, FixedValue)) { 578b1e98945e4b107eb3f2ac1b54706c49864842dc4Daniel Dunbar // The fixup was unresolved, we need a relocation. Inform the object 579b1e98945e4b107eb3f2ac1b54706c49864842dc4Daniel Dunbar // writer of the relocation, and give it an opportunity to adjust the 580b1e98945e4b107eb3f2ac1b54706c49864842dc4Daniel Dunbar // fixup value if need be. 581b1e98945e4b107eb3f2ac1b54706c49864842dc4Daniel Dunbar MOW.RecordRelocation(*this, *DF, Fixup, Target, FixedValue); 582b1e98945e4b107eb3f2ac1b54706c49864842dc4Daniel Dunbar } 583b1e98945e4b107eb3f2ac1b54706c49864842dc4Daniel Dunbar 58487190c473c216e481e0a70475577e496b3a3449eDaniel Dunbar getBackend().ApplyFixup(Fixup, *DF, FixedValue); 585b1e98945e4b107eb3f2ac1b54706c49864842dc4Daniel Dunbar } 586b1e98945e4b107eb3f2ac1b54706c49864842dc4Daniel Dunbar } 587b1e98945e4b107eb3f2ac1b54706c49864842dc4Daniel Dunbar } 588b1e98945e4b107eb3f2ac1b54706c49864842dc4Daniel Dunbar 589bacba997782f624d3c43591a913b8f1e3d733a52Daniel Dunbar // Write the object file. 590f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar MOW.WriteObject(*this); 591f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar 592f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar OS.flush(); 593f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar} 594f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar 595f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbarbool MCAssembler::FixupNeedsRelaxation(MCAsmFixup &Fixup, MCDataFragment *DF) { 596f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar // FIXME: Share layout object. 597f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar MCAsmLayout Layout(*this); 598f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar 599f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar // Currently we only need to relax X86::reloc_pcrel_1byte. 600f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar if (unsigned(Fixup.Kind) != X86::reloc_pcrel_1byte) 601f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar return false; 602f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar 603f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar // If we cannot resolve the fixup value, it requires relaxation. 604f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar MCValue Target; 605f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar uint64_t Value; 606f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar if (!EvaluateFixup(Layout, Fixup, DF, Target, Value)) 607f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar return true; 608f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar 609f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar // Otherwise, relax if the value is too big for a (signed) i8. 610f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar return int64_t(Value) != int64_t(int8_t(Value)); 611f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar} 612f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar 613f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbarbool MCAssembler::LayoutOnce() { 614d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar // Layout the concrete sections and fragments. 6155e835967dd5dda294d0ef3392f4c1d4a2260f532Daniel Dunbar uint64_t Address = 0; 616edc670f3f2ba629b6803a1a7ed4aa47061afd276Daniel Dunbar MCSectionData *Prev = 0; 617edc670f3f2ba629b6803a1a7ed4aa47061afd276Daniel Dunbar for (iterator it = begin(), ie = end(); it != ie; ++it) { 6186742e34385bff89b897ef0fc930c4bca9e75ac4aDaniel Dunbar MCSectionData &SD = *it; 6196742e34385bff89b897ef0fc930c4bca9e75ac4aDaniel Dunbar 620d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar // Skip virtual sections. 621cc5b84c6fba79a798e86ea604e54ca9429273a13Daniel Dunbar if (getBackend().isVirtualSection(SD.getSection())) 622d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar continue; 623d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar 624edc670f3f2ba629b6803a1a7ed4aa47061afd276Daniel Dunbar // Align this section if necessary by adding padding bytes to the previous 625edc670f3f2ba629b6803a1a7ed4aa47061afd276Daniel Dunbar // section. 626edc670f3f2ba629b6803a1a7ed4aa47061afd276Daniel Dunbar if (uint64_t Pad = OffsetToAlignment(Address, it->getAlignment())) { 627edc670f3f2ba629b6803a1a7ed4aa47061afd276Daniel Dunbar assert(Prev && "Missing prev section!"); 628edc670f3f2ba629b6803a1a7ed4aa47061afd276Daniel Dunbar Prev->setFileSize(Prev->getFileSize() + Pad); 629edc670f3f2ba629b6803a1a7ed4aa47061afd276Daniel Dunbar Address += Pad; 630edc670f3f2ba629b6803a1a7ed4aa47061afd276Daniel Dunbar } 6316742e34385bff89b897ef0fc930c4bca9e75ac4aDaniel Dunbar 6326742e34385bff89b897ef0fc930c4bca9e75ac4aDaniel Dunbar // Layout the section fragments and its size. 6336742e34385bff89b897ef0fc930c4bca9e75ac4aDaniel Dunbar SD.setAddress(Address); 634edc670f3f2ba629b6803a1a7ed4aa47061afd276Daniel Dunbar LayoutSection(SD); 6356742e34385bff89b897ef0fc930c4bca9e75ac4aDaniel Dunbar Address += SD.getFileSize(); 636edc670f3f2ba629b6803a1a7ed4aa47061afd276Daniel Dunbar 637edc670f3f2ba629b6803a1a7ed4aa47061afd276Daniel Dunbar Prev = &SD; 6385e835967dd5dda294d0ef3392f4c1d4a2260f532Daniel Dunbar } 6390705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar 640d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar // Layout the virtual sections. 641d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar for (iterator it = begin(), ie = end(); it != ie; ++it) { 642d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar MCSectionData &SD = *it; 643d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar 644cc5b84c6fba79a798e86ea604e54ca9429273a13Daniel Dunbar if (!getBackend().isVirtualSection(SD.getSection())) 645d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar continue; 646d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar 647b2b4acd757194b4b75e571ec7225811f94e753f3Daniel Dunbar // Align this section if necessary by adding padding bytes to the previous 648b2b4acd757194b4b75e571ec7225811f94e753f3Daniel Dunbar // section. 649f8b8ad77a8b5632886a4cfe41d798bae7277efcbDaniel Dunbar if (uint64_t Pad = OffsetToAlignment(Address, it->getAlignment())) 650b2b4acd757194b4b75e571ec7225811f94e753f3Daniel Dunbar Address += Pad; 651b2b4acd757194b4b75e571ec7225811f94e753f3Daniel Dunbar 652d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar SD.setAddress(Address); 653d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar LayoutSection(SD); 654d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar Address += SD.getSize(); 655d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar } 656d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar 657f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar // Scan the fixups in order and relax any that don't fit. 658f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar for (iterator it = begin(), ie = end(); it != ie; ++it) { 659f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar MCSectionData &SD = *it; 660b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar 661f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar for (MCSectionData::iterator it2 = SD.begin(), 662f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar ie2 = SD.end(); it2 != ie2; ++it2) { 663f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar MCDataFragment *DF = dyn_cast<MCDataFragment>(it2); 664f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar if (!DF) 665f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar continue; 6660705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar 667f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar for (MCDataFragment::fixup_iterator it3 = DF->fixup_begin(), 668f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar ie3 = DF->fixup_end(); it3 != ie3; ++it3) { 669f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar MCAsmFixup &Fixup = *it3; 670f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar 671f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar // Check whether we need to relax this fixup. 672f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar if (!FixupNeedsRelaxation(Fixup, DF)) 673f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar continue; 674f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar 675f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar // Relax the instruction. 676f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar // 677f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar // FIXME: This is a huge temporary hack which just looks for x86 678f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar // branches; the only thing we need to relax on x86 is 679f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar // 'X86::reloc_pcrel_1byte'. Once we have MCInst fragments, this will be 680f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar // replaced by a TargetAsmBackend hook (most likely tblgen'd) to relax 681f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar // an individual MCInst. 682f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar SmallVectorImpl<char> &C = DF->getContents(); 683f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar uint64_t PrevOffset = Fixup.Offset; 684f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar unsigned Amt = 0; 685f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar 686f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar // jcc instructions 687f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar if (unsigned(C[Fixup.Offset-1]) >= 0x70 && 688f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar unsigned(C[Fixup.Offset-1]) <= 0x7f) { 689f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar C[Fixup.Offset] = C[Fixup.Offset-1] + 0x10; 690f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar C[Fixup.Offset-1] = char(0x0f); 691f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar ++Fixup.Offset; 692f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar Amt = 4; 693f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar 694f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar // jmp rel8 695f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar } else if (C[Fixup.Offset-1] == char(0xeb)) { 696f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar C[Fixup.Offset-1] = char(0xe9); 697f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar Amt = 3; 698f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar 699f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar } else 700f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar llvm_unreachable("unknown 1 byte pcrel instruction!"); 701f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar 702f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar Fixup.Value = MCBinaryExpr::Create( 703f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar MCBinaryExpr::Sub, Fixup.Value, 704f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar MCConstantExpr::Create(3, getContext()), 705f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar getContext()); 706f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar C.insert(C.begin() + Fixup.Offset, Amt, char(0)); 707f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar Fixup.Kind = MCFixupKind(X86::reloc_pcrel_4byte); 708f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar 709f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar // Update the remaining fixups, which have slid. 710f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar // 711f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar // FIXME: This is bad for performance, but will be eliminated by the 712f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar // move to MCInst specific fragments. 713f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar ++it3; 714f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar for (; it3 != ie3; ++it3) 715f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar it3->Offset += Amt; 716b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar 717f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar // Update all the symbols for this fragment, which may have slid. 718f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar // 719f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar // FIXME: This is really really bad for performance, but will be 720f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar // eliminated by the move to MCInst specific fragments. 721f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar for (MCAssembler::symbol_iterator it = symbol_begin(), 722f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar ie = symbol_end(); it != ie; ++it) { 723f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar MCSymbolData &SD = *it; 724f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar 725f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar if (it->getFragment() != DF) 726f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar continue; 727f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar 728f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar if (SD.getOffset() > PrevOffset) 729f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar SD.setOffset(SD.getOffset() + Amt); 730f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar } 731f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar 732f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar // Restart layout. 733f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar // 734f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar // FIXME: This is O(N^2), but will be eliminated once we have a smart 735f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar // MCAsmLayout object. 736f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar return true; 737f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar } 738f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar } 739f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar } 740f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar 741f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar return false; 742f08fde41f34d739c157b1d75dadbb864e7957cabDaniel Dunbar} 743b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar 744b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar// Debugging methods 745b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar 746b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbarnamespace llvm { 747b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar 748b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbarraw_ostream &operator<<(raw_ostream &OS, const MCAsmFixup &AF) { 7492be2fd073003c0988723d2894dfb117ad90be11bDaniel Dunbar OS << "<MCAsmFixup" << " Offset:" << AF.Offset << " Value:" << *AF.Value 7502be2fd073003c0988723d2894dfb117ad90be11bDaniel Dunbar << " Kind:" << AF.Kind << ">"; 751b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar return OS; 752b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar} 753b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar 754b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar} 755b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar 756b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbarvoid MCFragment::dump() { 757b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar raw_ostream &OS = llvm::errs(); 758b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar 759b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar OS << "<MCFragment " << (void*) this << " Offset:" << Offset 760b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar << " FileSize:" << FileSize; 761b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar 762b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar OS << ">"; 763b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar} 764b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar 765b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbarvoid MCAlignFragment::dump() { 766b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar raw_ostream &OS = llvm::errs(); 767b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar 768b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar OS << "<MCAlignFragment "; 769b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar this->MCFragment::dump(); 770b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar OS << "\n "; 771b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar OS << " Alignment:" << getAlignment() 772b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar << " Value:" << getValue() << " ValueSize:" << getValueSize() 773b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar << " MaxBytesToEmit:" << getMaxBytesToEmit() << ">"; 774b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar} 775b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar 776b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbarvoid MCDataFragment::dump() { 777b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar raw_ostream &OS = llvm::errs(); 778b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar 779b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar OS << "<MCDataFragment "; 780b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar this->MCFragment::dump(); 781b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar OS << "\n "; 782b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar OS << " Contents:["; 783b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar for (unsigned i = 0, e = getContents().size(); i != e; ++i) { 784b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar if (i) OS << ","; 785b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar OS << hexdigit((Contents[i] >> 4) & 0xF) << hexdigit(Contents[i] & 0xF); 786b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar } 7872be2fd073003c0988723d2894dfb117ad90be11bDaniel Dunbar OS << "] (" << getContents().size() << " bytes)"; 7880bcf074867d4d366f7988a219c7a53265fcb4f23Daniel Dunbar 7890bcf074867d4d366f7988a219c7a53265fcb4f23Daniel Dunbar if (!getFixups().empty()) { 7900bcf074867d4d366f7988a219c7a53265fcb4f23Daniel Dunbar OS << ",\n "; 7910bcf074867d4d366f7988a219c7a53265fcb4f23Daniel Dunbar OS << " Fixups:["; 7920bcf074867d4d366f7988a219c7a53265fcb4f23Daniel Dunbar for (fixup_iterator it = fixup_begin(), ie = fixup_end(); it != ie; ++it) { 79345aefff64c64d5bd7804f39d994883b98ce4415aDaniel Dunbar if (it != fixup_begin()) OS << ",\n "; 7940bcf074867d4d366f7988a219c7a53265fcb4f23Daniel Dunbar OS << *it; 7950bcf074867d4d366f7988a219c7a53265fcb4f23Daniel Dunbar } 7960bcf074867d4d366f7988a219c7a53265fcb4f23Daniel Dunbar OS << "]"; 7970bcf074867d4d366f7988a219c7a53265fcb4f23Daniel Dunbar } 7980bcf074867d4d366f7988a219c7a53265fcb4f23Daniel Dunbar 7990bcf074867d4d366f7988a219c7a53265fcb4f23Daniel Dunbar OS << ">"; 800b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar} 801b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar 802b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbarvoid MCFillFragment::dump() { 803b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar raw_ostream &OS = llvm::errs(); 804b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar 805b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar OS << "<MCFillFragment "; 806b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar this->MCFragment::dump(); 807b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar OS << "\n "; 808b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar OS << " Value:" << getValue() << " ValueSize:" << getValueSize() 809b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar << " Count:" << getCount() << ">"; 810b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar} 811b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar 812b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbarvoid MCOrgFragment::dump() { 813b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar raw_ostream &OS = llvm::errs(); 814b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar 815b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar OS << "<MCOrgFragment "; 816b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar this->MCFragment::dump(); 817b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar OS << "\n "; 818b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar OS << " Offset:" << getOffset() << " Value:" << getValue() << ">"; 819b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar} 820b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar 821b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbarvoid MCZeroFillFragment::dump() { 822b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar raw_ostream &OS = llvm::errs(); 823b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar 824b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar OS << "<MCZeroFillFragment "; 825b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar this->MCFragment::dump(); 826b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar OS << "\n "; 827b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar OS << " Size:" << getSize() << " Alignment:" << getAlignment() << ">"; 828b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar} 829b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar 830b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbarvoid MCSectionData::dump() { 831b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar raw_ostream &OS = llvm::errs(); 832b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar 833b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar OS << "<MCSectionData"; 834b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar OS << " Alignment:" << getAlignment() << " Address:" << Address 835b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar << " Size:" << Size << " FileSize:" << FileSize 83645aefff64c64d5bd7804f39d994883b98ce4415aDaniel Dunbar << " Fragments:[\n "; 837b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar for (iterator it = begin(), ie = end(); it != ie; ++it) { 838b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar if (it != begin()) OS << ",\n "; 839b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar it->dump(); 840b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar } 841b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar OS << "]>"; 842b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar} 843b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar 844b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbarvoid MCSymbolData::dump() { 845b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar raw_ostream &OS = llvm::errs(); 846b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar 847b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar OS << "<MCSymbolData Symbol:" << getSymbol() 848b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar << " Fragment:" << getFragment() << " Offset:" << getOffset() 849b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar << " Flags:" << getFlags() << " Index:" << getIndex(); 850b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar if (isCommon()) 851b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar OS << " (common, size:" << getCommonSize() 852b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar << " align: " << getCommonAlignment() << ")"; 853b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar if (isExternal()) 854b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar OS << " (external)"; 855b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar if (isPrivateExtern()) 856b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar OS << " (private extern)"; 857b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar OS << ">"; 858b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar} 859b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar 860b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbarvoid MCAssembler::dump() { 861b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar raw_ostream &OS = llvm::errs(); 862b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar 863b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar OS << "<MCAssembler\n"; 86445aefff64c64d5bd7804f39d994883b98ce4415aDaniel Dunbar OS << " Sections:[\n "; 865b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar for (iterator it = begin(), ie = end(); it != ie; ++it) { 866b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar if (it != begin()) OS << ",\n "; 867b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar it->dump(); 868b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar } 869b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar OS << "],\n"; 870b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar OS << " Symbols:["; 871b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar 872b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar for (symbol_iterator it = symbol_begin(), ie = symbol_end(); it != ie; ++it) { 87345aefff64c64d5bd7804f39d994883b98ce4415aDaniel Dunbar if (it != symbol_begin()) OS << ",\n "; 874b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar it->dump(); 875b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar } 876b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar OS << "]>\n"; 877b7c3a4b195597848e7c2559937914ae1087f3131Daniel Dunbar} 878