#include "../Target/X86/X86FixupKinds.h"
#include "../Target/ARM/ARMFixupKinds.h"
-#include "../Target/MBlaze/MBlazeFixupKinds.h"
#include <vector>
using namespace llvm;
ELFRelocationEntry()
: r_offset(0), Index(0), Type(0), Symbol(0), r_addend(0) {}
- ELFRelocationEntry(uint64_t RelocOffset, int _Index,
- unsigned _Type, const MCSymbol *_Symbol,
+ ELFRelocationEntry(uint64_t RelocOffset, int Idx,
+ unsigned RelType, const MCSymbol *Sym,
uint64_t Addend)
- : r_offset(RelocOffset), Index(_Index), Type(_Type),
- Symbol(_Symbol), r_addend(Addend) {}
+ : r_offset(RelocOffset), Index(Idx), Type(RelType),
+ Symbol(Sym), r_addend(Addend) {}
// Support lexicographic sorting.
bool operator<(const ELFRelocationEntry &RE) const {
const MCFixup &Fixup, MCValue Target,
uint64_t &FixedValue);
+ private:
static bool isFixupKindPCRel(unsigned Kind) {
switch (Kind) {
default:
return false;
- case X86::reloc_pcrel_1byte:
- case X86::reloc_pcrel_4byte:
+ case FK_PCRel_1:
+ case FK_PCRel_2:
+ case FK_PCRel_4:
case X86::reloc_riprel_4byte:
case X86::reloc_riprel_4byte_movq_load:
return true;
const MCFixup &Fixup, MCValue Target,
uint64_t &FixedValue);
+ protected:
+ // Fixme: pull up to ELFObjectWriter
+ unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
+ bool IsPCRel);
+ private:
static bool isFixupKindPCRel(unsigned Kind) {
switch (Kind) {
default:
return false;
- case ARM::fixup_arm_pcrel_12:
- case ARM::fixup_arm_vfp_pcrel_12:
+ case FK_PCRel_1:
+ case FK_PCRel_2:
+ case FK_PCRel_4:
+ case ARM::fixup_arm_ldst_pcrel_12:
+ case ARM::fixup_arm_pcrel_10:
case ARM::fixup_arm_branch:
return true;
}
const MCFixup &Fixup, MCValue Target,
uint64_t &FixedValue);
+ private:
static bool isFixupKindPCRel(unsigned Kind) {
switch (Kind) {
default:
return false;
- case MBlaze::reloc_pcrel_2byte:
- case MBlaze::reloc_pcrel_4byte:
+ case FK_PCRel_1:
+ case FK_PCRel_2:
+ case FK_PCRel_4:
return true;
}
}
const MCSectionELF &Section =
static_cast<const MCSectionELF&>(ASymbol.getSection());
+ const SectionKind secKind = Section.getKind();
- if (Section.getKind().isBSS())
+ if (secKind.isBSS())
return NULL;
+ if (secKind.isThreadLocal()) {
+ if (Renamed)
+ return Renamed;
+ return &Symbol;
+ }
+
MCSymbolRefExpr::VariantKind Kind = Target.getSymA()->getKind();
const MCSectionELF &Sec2 =
static_cast<const MCSectionELF&>(F.getParent()->getSection());
MCDataFragment *F = new MCDataFragment(&RelaSD);
WriteRelocationsFragment(Asm, F, &SD);
-
- Asm.AddSectionToTheEnd(*this, RelaSD, Layout);
}
}
MCDataFragment *ShndxF = NULL;
if (NeedsSymtabShndx) {
ShndxF = new MCDataFragment(SymtabShndxSD);
- Asm.AddSectionToTheEnd(*this, *SymtabShndxSD, Layout);
}
WriteSymbolTable(F, ShndxF, Asm, Layout, SectionIndexMap);
- Asm.AddSectionToTheEnd(*this, SymtabSD, Layout);
F = new MCDataFragment(&StrtabSD);
F->getContents().append(StringTable.begin(), StringTable.end());
- Asm.AddSectionToTheEnd(*this, StrtabSD, Layout);
F = new MCDataFragment(&ShstrtabSD);
F->getContents() += Name;
F->getContents() += '\x00';
}
-
- Asm.AddSectionToTheEnd(*this, ShstrtabSD, Layout);
}
bool ELFObjectWriter::IsFixupFullyResolved(const MCAssembler &Asm,
MCDataFragment *F = new MCDataFragment(&Data);
String32(*F, NumGroups + Index);
}
-
- for (RevGroupMapTy::const_iterator i = RevGroupMap.begin(),
- e = RevGroupMap.end(); i != e; ++i) {
- const MCSectionELF *Group = i->second;
- MCSectionData &Data = Asm.getOrCreateSectionData(*Group);
- Asm.AddSectionToTheEnd(*this, Data, Layout);
- }
}
void ELFObjectWriter::WriteSection(MCAssembler &Asm,
Alignment, Section.getEntrySize());
}
+static bool IsELFMetaDataSection(const MCSectionData &SD) {
+ return SD.getAddress() == ~UINT64_C(0) &&
+ !SD.getSection().isVirtualSection();
+}
+
+static uint64_t DataSectionSize(const MCSectionData &SD) {
+ uint64_t Ret = 0;
+ for (MCSectionData::const_iterator i = SD.begin(), e = SD.end(); i != e;
+ ++i) {
+ const MCFragment &F = *i;
+ assert(F.getKind() == MCFragment::FT_Data);
+ Ret += cast<MCDataFragment>(F).getContents().size();
+ }
+ return Ret;
+}
+
+static uint64_t GetSectionFileSize(const MCAsmLayout &Layout,
+ const MCSectionData &SD) {
+ if (IsELFMetaDataSection(SD))
+ return DataSectionSize(SD);
+ return Layout.getSectionFileSize(&SD);
+}
+
+static uint64_t GetSectionSize(const MCAsmLayout &Layout,
+ const MCSectionData &SD) {
+ if (IsELFMetaDataSection(SD))
+ return DataSectionSize(SD);
+ return Layout.getSectionSize(&SD);
+}
+
+static void WriteDataSectionData(ELFObjectWriter *W, const MCSectionData &SD) {
+ for (MCSectionData::const_iterator i = SD.begin(), e = SD.end(); i != e;
+ ++i) {
+ const MCFragment &F = *i;
+ assert(F.getKind() == MCFragment::FT_Data);
+ W->WriteBytes(cast<MCDataFragment>(F).getContents().str());
+ }
+}
+
void ELFObjectWriter::WriteObject(MCAssembler &Asm,
const MCAsmLayout &Layout) {
GroupMapTy GroupMap;
FileOff = RoundUpToAlignment(FileOff, SD.getAlignment());
// Get the size of the section in the output file (including padding).
- uint64_t Size = Layout.getSectionFileSize(&SD);
-
- FileOff += Size;
+ FileOff += GetSectionFileSize(Layout, SD);
}
FileOff = RoundUpToAlignment(FileOff, NaturalAlignment);
// Remember the offset into the file for this section.
SectionOffsetMap[&Section] = FileOff;
- FileOff += Layout.getSectionFileSize(&SD);
+ FileOff += GetSectionFileSize(Layout, SD);
- Asm.WriteSectionData(&SD, Layout, this);
+ if (IsELFMetaDataSection(SD))
+ WriteDataSectionData(this, SD);
+ else
+ Asm.WriteSectionData(&SD, Layout, this);
}
uint64_t Padding = OffsetToAlignment(FileOff, NaturalAlignment);
else
GroupSymbolIndex = getSymbolIndexInSymbolTable(Asm, GroupMap[&Section]);
+ uint64_t Size = GetSectionSize(Layout, SD);
+
WriteSection(Asm, SectionIndexMap, GroupSymbolIndex,
- SectionOffsetMap[&Section], Layout.getSectionSize(&SD),
+ SectionOffsetMap[&Section], Size,
SD.getAlignment(), Section);
}
}
ARMELFObjectWriter::~ARMELFObjectWriter()
{}
+unsigned ARMELFObjectWriter::GetRelocType(const MCValue &Target,
+ const MCFixup &Fixup,
+ bool IsPCRel) {
+ MCSymbolRefExpr::VariantKind Modifier = Target.isAbsolute() ?
+ MCSymbolRefExpr::VK_None : Target.getSymA()->getKind();
+
+ if (IsPCRel) {
+ switch (Modifier) {
+ default: assert(0 && "Unimplemented Modifier");
+ case MCSymbolRefExpr::VK_None: break;
+ }
+ switch ((unsigned)Fixup.getKind()) {
+ default: assert(0 && "Unimplemented");
+ case ARM::fixup_arm_branch: return ELF::R_ARM_CALL; break;
+ }
+ } else {
+ switch ((unsigned)Fixup.getKind()) {
+ default: llvm_unreachable("invalid fixup kind!");
+ case ARM::fixup_arm_ldst_pcrel_12:
+ case ARM::fixup_arm_pcrel_10:
+ case ARM::fixup_arm_adr_pcrel_12:
+ assert(0 && "Unimplemented"); break;
+ case ARM::fixup_arm_branch:
+ return ELF::R_ARM_CALL; break;
+ case ARM::fixup_arm_movt_hi16:
+ return ELF::R_ARM_MOVT_ABS; break;
+ case ARM::fixup_arm_movw_lo16:
+ return ELF::R_ARM_MOVW_ABS_NC; break;
+ }
+ }
+
+ if (RelocNeedsGOT(Modifier))
+ NeedsGOT = true;
+ return -1;
+}
+
void ARMELFObjectWriter::RecordRelocation(const MCAssembler &Asm,
const MCAsmLayout &Layout,
const MCFragment *Fragment,
const MCFixup &Fixup,
MCValue Target,
uint64_t &FixedValue) {
- assert(0 && "ARMELFObjectWriter::RecordRelocation() unimplemented");
+ int64_t Addend = 0;
+ int Index = 0;
+ int64_t Value = Target.getConstant();
+ const MCSymbol *RelocSymbol = NULL;
+
+ bool IsPCRel = isFixupKindPCRel(Fixup.getKind());
+ if (!Target.isAbsolute()) {
+ const MCSymbol &Symbol = Target.getSymA()->getSymbol();
+ const MCSymbol &ASymbol = Symbol.AliasedSymbol();
+ RelocSymbol = SymbolToReloc(Asm, Target, *Fragment);
+
+ if (const MCSymbolRefExpr *RefB = Target.getSymB()) {
+ const MCSymbol &SymbolB = RefB->getSymbol();
+ MCSymbolData &SDB = Asm.getSymbolData(SymbolB);
+ IsPCRel = true;
+ MCSectionData *Sec = Fragment->getParent();
+
+ // Offset of the symbol in the section
+ int64_t a = Layout.getSymbolAddress(&SDB) - Layout.getSectionAddress(Sec);
+
+ // Ofeset of the relocation in the section
+ int64_t b = Layout.getFragmentOffset(Fragment) + Fixup.getOffset();
+ Value += b - a;
+ }
+
+ if (!RelocSymbol) {
+ MCSymbolData &SD = Asm.getSymbolData(ASymbol);
+ MCFragment *F = SD.getFragment();
+
+ Index = F->getParent()->getOrdinal() + 1;
+
+ MCSectionData *FSD = F->getParent();
+ // Offset of the symbol in the section
+ Value += Layout.getSymbolAddress(&SD) - Layout.getSectionAddress(FSD);
+ } else {
+ if (Asm.getSymbolData(Symbol).getFlags() & ELF_Other_Weakref)
+ WeakrefUsedInReloc.insert(RelocSymbol);
+ else
+ UsedInReloc.insert(RelocSymbol);
+ Index = -1;
+ }
+ Addend = Value;
+ // Compensate for the addend on i386.
+ if (Is64Bit)
+ Value = 0;
+ }
+
+ FixedValue = Value;
+
+ // determine the type of the relocation
+ unsigned Type = GetRelocType(Target, Fixup, IsPCRel);
+
+ uint64_t RelocOffset = Layout.getFragmentOffset(Fragment) +
+ Fixup.getOffset();
+
+ if (!HasRelocationAddend) Addend = 0;
+ ELFRelocationEntry ERE(RelocOffset, Index, Type, RelocSymbol, Addend);
+ Relocations[Fragment->getParent()].push_back(ERE);
}
//===- MBlazeELFObjectWriter -------------------------------------------===//
switch ((unsigned)Fixup.getKind()) {
default:
llvm_unreachable("Unimplemented");
- case MBlaze::reloc_pcrel_4byte:
+ case FK_PCRel_4:
Type = ELF::R_MICROBLAZE_64_PCREL;
break;
- case MBlaze::reloc_pcrel_2byte:
+ case FK_PCRel_2:
Type = ELF::R_MICROBLAZE_32_PCREL;
break;
}
uint64_t RelocOffset = Layout.getFragmentOffset(Fragment) +
Fixup.getOffset();
- if (! HasRelocationAddend) Addend = 0;
+ if (!HasRelocationAddend) Addend = 0;
ELFRelocationEntry ERE(RelocOffset, Index, Type, RelocSymbol, Addend);
Relocations[Fragment->getParent()].push_back(ERE);
}
default: llvm_unreachable("invalid fixup kind!");
case FK_Data_8: Type = ELF::R_X86_64_64; break;
case X86::reloc_signed_4byte:
- case X86::reloc_pcrel_4byte:
+ case FK_PCRel_4:
assert(isInt<32>(Target.getConstant()));
switch (Modifier) {
default:
Type = ELF::R_X86_64_32;
break;
case FK_Data_2: Type = ELF::R_X86_64_16; break;
- case X86::reloc_pcrel_1byte:
+ case FK_PCRel_1:
case FK_Data_1: Type = ELF::R_X86_64_8; break;
}
}
// FIXME: Should we avoid selecting reloc_signed_4byte in 32 bit mode
// instead?
case X86::reloc_signed_4byte:
- case X86::reloc_pcrel_4byte:
+ case FK_PCRel_4:
case FK_Data_4:
switch (Modifier) {
default:
}
break;
case FK_Data_2: Type = ELF::R_386_16; break;
- case X86::reloc_pcrel_1byte:
+ case FK_PCRel_1:
case FK_Data_1: Type = ELF::R_386_8; break;
}
}
uint64_t RelocOffset = Layout.getFragmentOffset(Fragment) +
Fixup.getOffset();
- if (! HasRelocationAddend) Addend = 0;
+ if (!HasRelocationAddend) Addend = 0;
ELFRelocationEntry ERE(RelocOffset, Index, Type, RelocSymbol, Addend);
Relocations[Fragment->getParent()].push_back(ERE);
}
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