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https://github.com/c64scene-ar/llvm-6502.git
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Split MCEELFStreamer and ELFObjectWriter into .h and .cpp files, so that other components can use them.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126942 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jan Sjödin
@@ -11,21 +11,14 @@
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//
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//
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//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//
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#include "MCELF.h"
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#include "ELFObjectWriter.h"
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#include "llvm/ADT/OwningPtr.h"
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#include "llvm/ADT/SmallPtrSet.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/StringMap.h"
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#include "llvm/ADT/StringMap.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/MC/MCAssembler.h"
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#include "llvm/MC/MCAsmLayout.h"
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#include "llvm/MC/MCAsmLayout.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCELFSymbolFlags.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCELFObjectWriter.h"
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#include "llvm/MC/MCObjectWriter.h"
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#include "llvm/MC/MCSectionELF.h"
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#include "llvm/MC/MCSectionELF.h"
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#include "llvm/MC/MCSymbol.h"
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#include "llvm/MC/MCValue.h"
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#include "llvm/MC/MCValue.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/ErrorHandling.h"
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@@ -39,361 +32,6 @@
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#include <vector>
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#include <vector>
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using namespace llvm;
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using namespace llvm;
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namespace {
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class ELFObjectWriter : public MCObjectWriter {
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protected:
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static bool isFixupKindPCRel(const MCAssembler &Asm, unsigned Kind);
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static bool RelocNeedsGOT(MCSymbolRefExpr::VariantKind Variant);
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static uint64_t SymbolValue(MCSymbolData &Data, const MCAsmLayout &Layout);
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static bool isInSymtab(const MCAssembler &Asm, const MCSymbolData &Data,
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bool Used, bool Renamed);
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static bool isLocal(const MCSymbolData &Data, bool isSignature,
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bool isUsedInReloc);
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static bool IsELFMetaDataSection(const MCSectionData &SD);
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static uint64_t DataSectionSize(const MCSectionData &SD);
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static uint64_t GetSectionFileSize(const MCAsmLayout &Layout,
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const MCSectionData &SD);
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static uint64_t GetSectionAddressSize(const MCAsmLayout &Layout,
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const MCSectionData &SD);
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static void WriteDataSectionData(ELFObjectWriter *W,
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const MCSectionData &SD);
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/*static bool isFixupKindX86RIPRel(unsigned Kind) {
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return Kind == X86::reloc_riprel_4byte ||
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Kind == X86::reloc_riprel_4byte_movq_load;
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}*/
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/// ELFSymbolData - Helper struct for containing some precomputed
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/// information on symbols.
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struct ELFSymbolData {
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MCSymbolData *SymbolData;
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uint64_t StringIndex;
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uint32_t SectionIndex;
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// Support lexicographic sorting.
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bool operator<(const ELFSymbolData &RHS) const {
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if (MCELF::GetType(*SymbolData) == ELF::STT_FILE)
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return true;
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if (MCELF::GetType(*RHS.SymbolData) == ELF::STT_FILE)
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return false;
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return SymbolData->getSymbol().getName() <
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RHS.SymbolData->getSymbol().getName();
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}
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};
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/// @name Relocation Data
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/// @{
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struct ELFRelocationEntry {
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// Make these big enough for both 32-bit and 64-bit
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uint64_t r_offset;
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int Index;
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unsigned Type;
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const MCSymbol *Symbol;
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uint64_t r_addend;
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ELFRelocationEntry()
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: r_offset(0), Index(0), Type(0), Symbol(0), r_addend(0) {}
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ELFRelocationEntry(uint64_t RelocOffset, int Idx,
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unsigned RelType, const MCSymbol *Sym,
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uint64_t Addend)
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: r_offset(RelocOffset), Index(Idx), Type(RelType),
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Symbol(Sym), r_addend(Addend) {}
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// Support lexicographic sorting.
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bool operator<(const ELFRelocationEntry &RE) const {
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return RE.r_offset < r_offset;
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}
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};
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/// The target specific ELF writer instance.
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llvm::OwningPtr<MCELFObjectTargetWriter> TargetObjectWriter;
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SmallPtrSet<const MCSymbol *, 16> UsedInReloc;
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SmallPtrSet<const MCSymbol *, 16> WeakrefUsedInReloc;
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DenseMap<const MCSymbol *, const MCSymbol *> Renames;
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llvm::DenseMap<const MCSectionData*,
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std::vector<ELFRelocationEntry> > Relocations;
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DenseMap<const MCSection*, uint64_t> SectionStringTableIndex;
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/// @}
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/// @name Symbol Table Data
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/// @{
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SmallString<256> StringTable;
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std::vector<ELFSymbolData> LocalSymbolData;
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std::vector<ELFSymbolData> ExternalSymbolData;
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std::vector<ELFSymbolData> UndefinedSymbolData;
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/// @}
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bool NeedsGOT;
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bool NeedsSymtabShndx;
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// This holds the symbol table index of the last local symbol.
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unsigned LastLocalSymbolIndex;
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// This holds the .strtab section index.
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unsigned StringTableIndex;
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// This holds the .symtab section index.
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unsigned SymbolTableIndex;
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unsigned ShstrtabIndex;
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const MCSymbol *SymbolToReloc(const MCAssembler &Asm,
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const MCValue &Target,
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const MCFragment &F) const;
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// For arch-specific emission of explicit reloc symbol
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virtual const MCSymbol *ExplicitRelSym(const MCAssembler &Asm,
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const MCValue &Target,
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const MCFragment &F,
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bool IsBSS) const {
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return NULL;
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}
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bool is64Bit() const { return TargetObjectWriter->is64Bit(); }
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bool hasRelocationAddend() const {
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return TargetObjectWriter->hasRelocationAddend();
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}
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public:
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ELFObjectWriter(MCELFObjectTargetWriter *MOTW,
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raw_ostream &_OS, bool IsLittleEndian)
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: MCObjectWriter(_OS, IsLittleEndian),
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TargetObjectWriter(MOTW),
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NeedsGOT(false), NeedsSymtabShndx(false){
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}
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virtual ~ELFObjectWriter();
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void WriteWord(uint64_t W) {
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if (is64Bit())
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Write64(W);
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else
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Write32(W);
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}
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void StringLE16(char *buf, uint16_t Value) {
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buf[0] = char(Value >> 0);
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buf[1] = char(Value >> 8);
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}
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void StringLE32(char *buf, uint32_t Value) {
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StringLE16(buf, uint16_t(Value >> 0));
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StringLE16(buf + 2, uint16_t(Value >> 16));
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}
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void StringLE64(char *buf, uint64_t Value) {
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StringLE32(buf, uint32_t(Value >> 0));
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StringLE32(buf + 4, uint32_t(Value >> 32));
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}
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void StringBE16(char *buf ,uint16_t Value) {
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buf[0] = char(Value >> 8);
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buf[1] = char(Value >> 0);
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}
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void StringBE32(char *buf, uint32_t Value) {
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StringBE16(buf, uint16_t(Value >> 16));
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StringBE16(buf + 2, uint16_t(Value >> 0));
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}
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void StringBE64(char *buf, uint64_t Value) {
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StringBE32(buf, uint32_t(Value >> 32));
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StringBE32(buf + 4, uint32_t(Value >> 0));
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}
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void String8(MCDataFragment &F, uint8_t Value) {
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char buf[1];
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buf[0] = Value;
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F.getContents() += StringRef(buf, 1);
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}
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void String16(MCDataFragment &F, uint16_t Value) {
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char buf[2];
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if (isLittleEndian())
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StringLE16(buf, Value);
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else
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StringBE16(buf, Value);
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F.getContents() += StringRef(buf, 2);
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}
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void String32(MCDataFragment &F, uint32_t Value) {
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char buf[4];
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if (isLittleEndian())
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StringLE32(buf, Value);
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else
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StringBE32(buf, Value);
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F.getContents() += StringRef(buf, 4);
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}
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void String64(MCDataFragment &F, uint64_t Value) {
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char buf[8];
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if (isLittleEndian())
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StringLE64(buf, Value);
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else
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StringBE64(buf, Value);
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F.getContents() += StringRef(buf, 8);
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}
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virtual void WriteHeader(uint64_t SectionDataSize, unsigned NumberOfSections);
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/// Default e_flags = 0
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virtual void WriteEFlags() { Write32(0); }
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virtual void WriteSymbolEntry(MCDataFragment *SymtabF, MCDataFragment *ShndxF,
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uint64_t name, uint8_t info,
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uint64_t value, uint64_t size,
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uint8_t other, uint32_t shndx,
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bool Reserved);
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virtual void WriteSymbol(MCDataFragment *SymtabF, MCDataFragment *ShndxF,
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ELFSymbolData &MSD,
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const MCAsmLayout &Layout);
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typedef DenseMap<const MCSectionELF*, uint32_t> SectionIndexMapTy;
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virtual void WriteSymbolTable(MCDataFragment *SymtabF, MCDataFragment *ShndxF,
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const MCAssembler &Asm,
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const MCAsmLayout &Layout,
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const SectionIndexMapTy &SectionIndexMap);
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virtual void RecordRelocation(const MCAssembler &Asm, const MCAsmLayout &Layout,
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const MCFragment *Fragment, const MCFixup &Fixup,
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MCValue Target, uint64_t &FixedValue);
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virtual uint64_t getSymbolIndexInSymbolTable(const MCAssembler &Asm,
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const MCSymbol *S);
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// Map from a group section to the signature symbol
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typedef DenseMap<const MCSectionELF*, const MCSymbol*> GroupMapTy;
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// Map from a signature symbol to the group section
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typedef DenseMap<const MCSymbol*, const MCSectionELF*> RevGroupMapTy;
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/// ComputeSymbolTable - Compute the symbol table data
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///
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/// \param StringTable [out] - The string table data.
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/// \param StringIndexMap [out] - Map from symbol names to offsets in the
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/// string table.
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virtual void ComputeSymbolTable(MCAssembler &Asm,
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const SectionIndexMapTy &SectionIndexMap,
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RevGroupMapTy RevGroupMap);
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virtual void ComputeIndexMap(MCAssembler &Asm,
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SectionIndexMapTy &SectionIndexMap);
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virtual void WriteRelocation(MCAssembler &Asm, MCAsmLayout &Layout,
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const MCSectionData &SD);
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virtual void WriteRelocations(MCAssembler &Asm, MCAsmLayout &Layout) {
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for (MCAssembler::const_iterator it = Asm.begin(),
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ie = Asm.end(); it != ie; ++it) {
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WriteRelocation(Asm, Layout, *it);
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}
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}
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virtual void CreateMetadataSections(MCAssembler &Asm, MCAsmLayout &Layout,
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const SectionIndexMapTy &SectionIndexMap);
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// Create the sections that show up in the symbol table. Currently
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// those are the .note.GNU-stack section and the group sections.
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virtual void CreateIndexedSections(MCAssembler &Asm, MCAsmLayout &Layout,
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GroupMapTy &GroupMap,
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RevGroupMapTy &RevGroupMap);
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virtual void ExecutePostLayoutBinding(MCAssembler &Asm,
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const MCAsmLayout &Layout);
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virtual void WriteSecHdrEntry(uint32_t Name, uint32_t Type, uint64_t Flags,
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uint64_t Address, uint64_t Offset,
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uint64_t Size, uint32_t Link, uint32_t Info,
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uint64_t Alignment, uint64_t EntrySize);
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virtual void WriteRelocationsFragment(const MCAssembler &Asm,
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MCDataFragment *F,
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const MCSectionData *SD);
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virtual bool
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IsSymbolRefDifferenceFullyResolvedImpl(const MCAssembler &Asm,
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const MCSymbolData &DataA,
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const MCFragment &FB,
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bool InSet,
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bool IsPCRel) const;
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virtual void WriteObject(MCAssembler &Asm, const MCAsmLayout &Layout);
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virtual void WriteSection(MCAssembler &Asm,
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const SectionIndexMapTy &SectionIndexMap,
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uint32_t GroupSymbolIndex,
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uint64_t Offset, uint64_t Size, uint64_t Alignment,
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const MCSectionELF &Section);
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protected:
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virtual unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
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bool IsPCRel, bool IsRelocWithSymbol,
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int64_t Addend) = 0;
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};
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//===- X86ELFObjectWriter -------------------------------------------===//
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class X86ELFObjectWriter : public ELFObjectWriter {
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public:
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X86ELFObjectWriter(MCELFObjectTargetWriter *MOTW,
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raw_ostream &_OS,
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bool IsLittleEndian);
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virtual ~X86ELFObjectWriter();
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protected:
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virtual unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
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bool IsPCRel, bool IsRelocWithSymbol,
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int64_t Addend);
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};
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//===- ARMELFObjectWriter -------------------------------------------===//
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class ARMELFObjectWriter : public ELFObjectWriter {
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public:
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// FIXME: MCAssembler can't yet return the Subtarget,
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enum { DefaultEABIVersion = 0x05000000U };
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ARMELFObjectWriter(MCELFObjectTargetWriter *MOTW,
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raw_ostream &_OS,
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bool IsLittleEndian);
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virtual ~ARMELFObjectWriter();
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virtual void WriteEFlags();
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||||||
protected:
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virtual const MCSymbol *ExplicitRelSym(const MCAssembler &Asm,
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||||||
const MCValue &Target,
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||||||
const MCFragment &F,
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||||||
bool IsBSS) const;
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||||||
|
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||||||
virtual unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
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||||||
bool IsPCRel, bool IsRelocWithSymbol,
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||||||
int64_t Addend);
|
|
||||||
};
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|
||||||
|
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||||||
//===- MBlazeELFObjectWriter -------------------------------------------===//
|
|
||||||
|
|
||||||
class MBlazeELFObjectWriter : public ELFObjectWriter {
|
|
||||||
public:
|
|
||||||
MBlazeELFObjectWriter(MCELFObjectTargetWriter *MOTW,
|
|
||||||
raw_ostream &_OS,
|
|
||||||
bool IsLittleEndian);
|
|
||||||
|
|
||||||
virtual ~MBlazeELFObjectWriter();
|
|
||||||
protected:
|
|
||||||
virtual unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
|
|
||||||
bool IsPCRel, bool IsRelocWithSymbol,
|
|
||||||
int64_t Addend);
|
|
||||||
};
|
|
||||||
}
|
|
||||||
|
|
||||||
bool ELFObjectWriter::isFixupKindPCRel(const MCAssembler &Asm, unsigned Kind) {
|
bool ELFObjectWriter::isFixupKindPCRel(const MCAssembler &Asm, unsigned Kind) {
|
||||||
const MCFixupKindInfo &FKI =
|
const MCFixupKindInfo &FKI =
|
||||||
Asm.getBackend().getFixupKindInfo((MCFixupKind) Kind);
|
Asm.getBackend().getFixupKindInfo((MCFixupKind) Kind);
|
||||||
|
|||||||
391
lib/MC/ELFObjectWriter.h
Normal file
391
lib/MC/ELFObjectWriter.h
Normal file
@@ -0,0 +1,391 @@
|
|||||||
|
//===- lib/MC/ELFObjectWriter.h - ELF File Writer -------------------------===//
|
||||||
|
//
|
||||||
|
// The LLVM Compiler Infrastructure
|
||||||
|
//
|
||||||
|
// This file is distributed under the University of Illinois Open Source
|
||||||
|
// License. See LICENSE.TXT for details.
|
||||||
|
//
|
||||||
|
//===----------------------------------------------------------------------===//
|
||||||
|
//
|
||||||
|
// This file implements ELF object file writer information.
|
||||||
|
//
|
||||||
|
//===----------------------------------------------------------------------===//
|
||||||
|
|
||||||
|
#ifndef LLVM_MC_ELFOBJECTWRITER_H
|
||||||
|
#define LLVM_MC_ELFOBJECTWRITER_H
|
||||||
|
|
||||||
|
#include "MCELF.h"
|
||||||
|
#include "llvm/ADT/OwningPtr.h"
|
||||||
|
#include "llvm/ADT/SmallPtrSet.h"
|
||||||
|
#include "llvm/ADT/SmallString.h"
|
||||||
|
#include "llvm/ADT/STLExtras.h"
|
||||||
|
#include "llvm/MC/MCAssembler.h"
|
||||||
|
#include "llvm/MC/MCELFObjectWriter.h"
|
||||||
|
#include "llvm/MC/MCELFSymbolFlags.h"
|
||||||
|
#include "llvm/MC/MCObjectWriter.h"
|
||||||
|
#include "llvm/MC/MCExpr.h"
|
||||||
|
#include "llvm/MC/MCSymbol.h"
|
||||||
|
|
||||||
|
#include <vector>
|
||||||
|
|
||||||
|
namespace llvm {
|
||||||
|
|
||||||
|
class MCSection;
|
||||||
|
class MCDataFragment;
|
||||||
|
class MCSectionELF;
|
||||||
|
|
||||||
|
class ELFObjectWriter : public MCObjectWriter {
|
||||||
|
protected:
|
||||||
|
|
||||||
|
static bool isFixupKindPCRel(const MCAssembler &Asm, unsigned Kind);
|
||||||
|
static bool RelocNeedsGOT(MCSymbolRefExpr::VariantKind Variant);
|
||||||
|
static uint64_t SymbolValue(MCSymbolData &Data, const MCAsmLayout &Layout);
|
||||||
|
static bool isInSymtab(const MCAssembler &Asm, const MCSymbolData &Data,
|
||||||
|
bool Used, bool Renamed);
|
||||||
|
static bool isLocal(const MCSymbolData &Data, bool isSignature,
|
||||||
|
bool isUsedInReloc);
|
||||||
|
static bool IsELFMetaDataSection(const MCSectionData &SD);
|
||||||
|
static uint64_t DataSectionSize(const MCSectionData &SD);
|
||||||
|
static uint64_t GetSectionFileSize(const MCAsmLayout &Layout,
|
||||||
|
const MCSectionData &SD);
|
||||||
|
static uint64_t GetSectionAddressSize(const MCAsmLayout &Layout,
|
||||||
|
const MCSectionData &SD);
|
||||||
|
static void WriteDataSectionData(ELFObjectWriter *W,
|
||||||
|
const MCSectionData &SD);
|
||||||
|
|
||||||
|
/*static bool isFixupKindX86RIPRel(unsigned Kind) {
|
||||||
|
return Kind == X86::reloc_riprel_4byte ||
|
||||||
|
Kind == X86::reloc_riprel_4byte_movq_load;
|
||||||
|
}*/
|
||||||
|
|
||||||
|
/// ELFSymbolData - Helper struct for containing some precomputed
|
||||||
|
/// information on symbols.
|
||||||
|
struct ELFSymbolData {
|
||||||
|
MCSymbolData *SymbolData;
|
||||||
|
uint64_t StringIndex;
|
||||||
|
uint32_t SectionIndex;
|
||||||
|
|
||||||
|
// Support lexicographic sorting.
|
||||||
|
bool operator<(const ELFSymbolData &RHS) const {
|
||||||
|
if (MCELF::GetType(*SymbolData) == ELF::STT_FILE)
|
||||||
|
return true;
|
||||||
|
if (MCELF::GetType(*RHS.SymbolData) == ELF::STT_FILE)
|
||||||
|
return false;
|
||||||
|
return SymbolData->getSymbol().getName() <
|
||||||
|
RHS.SymbolData->getSymbol().getName();
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
/// @name Relocation Data
|
||||||
|
/// @{
|
||||||
|
|
||||||
|
struct ELFRelocationEntry {
|
||||||
|
// Make these big enough for both 32-bit and 64-bit
|
||||||
|
uint64_t r_offset;
|
||||||
|
int Index;
|
||||||
|
unsigned Type;
|
||||||
|
const MCSymbol *Symbol;
|
||||||
|
uint64_t r_addend;
|
||||||
|
|
||||||
|
ELFRelocationEntry()
|
||||||
|
: r_offset(0), Index(0), Type(0), Symbol(0), r_addend(0) {}
|
||||||
|
|
||||||
|
ELFRelocationEntry(uint64_t RelocOffset, int Idx,
|
||||||
|
unsigned RelType, const MCSymbol *Sym,
|
||||||
|
uint64_t Addend)
|
||||||
|
: r_offset(RelocOffset), Index(Idx), Type(RelType),
|
||||||
|
Symbol(Sym), r_addend(Addend) {}
|
||||||
|
|
||||||
|
// Support lexicographic sorting.
|
||||||
|
bool operator<(const ELFRelocationEntry &RE) const {
|
||||||
|
return RE.r_offset < r_offset;
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
/// The target specific ELF writer instance.
|
||||||
|
llvm::OwningPtr<MCELFObjectTargetWriter> TargetObjectWriter;
|
||||||
|
|
||||||
|
SmallPtrSet<const MCSymbol *, 16> UsedInReloc;
|
||||||
|
SmallPtrSet<const MCSymbol *, 16> WeakrefUsedInReloc;
|
||||||
|
DenseMap<const MCSymbol *, const MCSymbol *> Renames;
|
||||||
|
|
||||||
|
llvm::DenseMap<const MCSectionData*,
|
||||||
|
std::vector<ELFRelocationEntry> > Relocations;
|
||||||
|
DenseMap<const MCSection*, uint64_t> SectionStringTableIndex;
|
||||||
|
|
||||||
|
/// @}
|
||||||
|
/// @name Symbol Table Data
|
||||||
|
/// @{
|
||||||
|
|
||||||
|
SmallString<256> StringTable;
|
||||||
|
std::vector<ELFSymbolData> LocalSymbolData;
|
||||||
|
std::vector<ELFSymbolData> ExternalSymbolData;
|
||||||
|
std::vector<ELFSymbolData> UndefinedSymbolData;
|
||||||
|
|
||||||
|
/// @}
|
||||||
|
|
||||||
|
bool NeedsGOT;
|
||||||
|
|
||||||
|
bool NeedsSymtabShndx;
|
||||||
|
|
||||||
|
// This holds the symbol table index of the last local symbol.
|
||||||
|
unsigned LastLocalSymbolIndex;
|
||||||
|
// This holds the .strtab section index.
|
||||||
|
unsigned StringTableIndex;
|
||||||
|
// This holds the .symtab section index.
|
||||||
|
unsigned SymbolTableIndex;
|
||||||
|
|
||||||
|
unsigned ShstrtabIndex;
|
||||||
|
|
||||||
|
|
||||||
|
const MCSymbol *SymbolToReloc(const MCAssembler &Asm,
|
||||||
|
const MCValue &Target,
|
||||||
|
const MCFragment &F) const;
|
||||||
|
|
||||||
|
// For arch-specific emission of explicit reloc symbol
|
||||||
|
virtual const MCSymbol *ExplicitRelSym(const MCAssembler &Asm,
|
||||||
|
const MCValue &Target,
|
||||||
|
const MCFragment &F,
|
||||||
|
bool IsBSS) const {
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
bool is64Bit() const { return TargetObjectWriter->is64Bit(); }
|
||||||
|
bool hasRelocationAddend() const {
|
||||||
|
return TargetObjectWriter->hasRelocationAddend();
|
||||||
|
}
|
||||||
|
|
||||||
|
public:
|
||||||
|
ELFObjectWriter(MCELFObjectTargetWriter *MOTW,
|
||||||
|
raw_ostream &_OS, bool IsLittleEndian)
|
||||||
|
: MCObjectWriter(_OS, IsLittleEndian),
|
||||||
|
TargetObjectWriter(MOTW),
|
||||||
|
NeedsGOT(false), NeedsSymtabShndx(false){
|
||||||
|
}
|
||||||
|
|
||||||
|
virtual ~ELFObjectWriter();
|
||||||
|
|
||||||
|
void WriteWord(uint64_t W) {
|
||||||
|
if (is64Bit())
|
||||||
|
Write64(W);
|
||||||
|
else
|
||||||
|
Write32(W);
|
||||||
|
}
|
||||||
|
|
||||||
|
void StringLE16(char *buf, uint16_t Value) {
|
||||||
|
buf[0] = char(Value >> 0);
|
||||||
|
buf[1] = char(Value >> 8);
|
||||||
|
}
|
||||||
|
|
||||||
|
void StringLE32(char *buf, uint32_t Value) {
|
||||||
|
StringLE16(buf, uint16_t(Value >> 0));
|
||||||
|
StringLE16(buf + 2, uint16_t(Value >> 16));
|
||||||
|
}
|
||||||
|
|
||||||
|
void StringLE64(char *buf, uint64_t Value) {
|
||||||
|
StringLE32(buf, uint32_t(Value >> 0));
|
||||||
|
StringLE32(buf + 4, uint32_t(Value >> 32));
|
||||||
|
}
|
||||||
|
|
||||||
|
void StringBE16(char *buf ,uint16_t Value) {
|
||||||
|
buf[0] = char(Value >> 8);
|
||||||
|
buf[1] = char(Value >> 0);
|
||||||
|
}
|
||||||
|
|
||||||
|
void StringBE32(char *buf, uint32_t Value) {
|
||||||
|
StringBE16(buf, uint16_t(Value >> 16));
|
||||||
|
StringBE16(buf + 2, uint16_t(Value >> 0));
|
||||||
|
}
|
||||||
|
|
||||||
|
void StringBE64(char *buf, uint64_t Value) {
|
||||||
|
StringBE32(buf, uint32_t(Value >> 32));
|
||||||
|
StringBE32(buf + 4, uint32_t(Value >> 0));
|
||||||
|
}
|
||||||
|
|
||||||
|
void String8(MCDataFragment &F, uint8_t Value) {
|
||||||
|
char buf[1];
|
||||||
|
buf[0] = Value;
|
||||||
|
F.getContents() += StringRef(buf, 1);
|
||||||
|
}
|
||||||
|
|
||||||
|
void String16(MCDataFragment &F, uint16_t Value) {
|
||||||
|
char buf[2];
|
||||||
|
if (isLittleEndian())
|
||||||
|
StringLE16(buf, Value);
|
||||||
|
else
|
||||||
|
StringBE16(buf, Value);
|
||||||
|
F.getContents() += StringRef(buf, 2);
|
||||||
|
}
|
||||||
|
|
||||||
|
void String32(MCDataFragment &F, uint32_t Value) {
|
||||||
|
char buf[4];
|
||||||
|
if (isLittleEndian())
|
||||||
|
StringLE32(buf, Value);
|
||||||
|
else
|
||||||
|
StringBE32(buf, Value);
|
||||||
|
F.getContents() += StringRef(buf, 4);
|
||||||
|
}
|
||||||
|
|
||||||
|
void String64(MCDataFragment &F, uint64_t Value) {
|
||||||
|
char buf[8];
|
||||||
|
if (isLittleEndian())
|
||||||
|
StringLE64(buf, Value);
|
||||||
|
else
|
||||||
|
StringBE64(buf, Value);
|
||||||
|
F.getContents() += StringRef(buf, 8);
|
||||||
|
}
|
||||||
|
|
||||||
|
virtual void WriteHeader(uint64_t SectionDataSize, unsigned NumberOfSections);
|
||||||
|
|
||||||
|
/// Default e_flags = 0
|
||||||
|
virtual void WriteEFlags() { Write32(0); }
|
||||||
|
|
||||||
|
virtual void WriteSymbolEntry(MCDataFragment *SymtabF, MCDataFragment *ShndxF,
|
||||||
|
uint64_t name, uint8_t info,
|
||||||
|
uint64_t value, uint64_t size,
|
||||||
|
uint8_t other, uint32_t shndx,
|
||||||
|
bool Reserved);
|
||||||
|
|
||||||
|
virtual void WriteSymbol(MCDataFragment *SymtabF, MCDataFragment *ShndxF,
|
||||||
|
ELFSymbolData &MSD,
|
||||||
|
const MCAsmLayout &Layout);
|
||||||
|
|
||||||
|
typedef DenseMap<const MCSectionELF*, uint32_t> SectionIndexMapTy;
|
||||||
|
virtual void WriteSymbolTable(MCDataFragment *SymtabF, MCDataFragment *ShndxF,
|
||||||
|
const MCAssembler &Asm,
|
||||||
|
const MCAsmLayout &Layout,
|
||||||
|
const SectionIndexMapTy &SectionIndexMap);
|
||||||
|
|
||||||
|
virtual void RecordRelocation(const MCAssembler &Asm, const MCAsmLayout &Layout,
|
||||||
|
const MCFragment *Fragment, const MCFixup &Fixup,
|
||||||
|
MCValue Target, uint64_t &FixedValue);
|
||||||
|
|
||||||
|
virtual uint64_t getSymbolIndexInSymbolTable(const MCAssembler &Asm,
|
||||||
|
const MCSymbol *S);
|
||||||
|
|
||||||
|
// Map from a group section to the signature symbol
|
||||||
|
typedef DenseMap<const MCSectionELF*, const MCSymbol*> GroupMapTy;
|
||||||
|
// Map from a signature symbol to the group section
|
||||||
|
typedef DenseMap<const MCSymbol*, const MCSectionELF*> RevGroupMapTy;
|
||||||
|
|
||||||
|
/// ComputeSymbolTable - Compute the symbol table data
|
||||||
|
///
|
||||||
|
/// \param StringTable [out] - The string table data.
|
||||||
|
/// \param StringIndexMap [out] - Map from symbol names to offsets in the
|
||||||
|
/// string table.
|
||||||
|
virtual void ComputeSymbolTable(MCAssembler &Asm,
|
||||||
|
const SectionIndexMapTy &SectionIndexMap,
|
||||||
|
RevGroupMapTy RevGroupMap);
|
||||||
|
|
||||||
|
virtual void ComputeIndexMap(MCAssembler &Asm,
|
||||||
|
SectionIndexMapTy &SectionIndexMap);
|
||||||
|
|
||||||
|
virtual void WriteRelocation(MCAssembler &Asm, MCAsmLayout &Layout,
|
||||||
|
const MCSectionData &SD);
|
||||||
|
|
||||||
|
virtual void WriteRelocations(MCAssembler &Asm, MCAsmLayout &Layout) {
|
||||||
|
for (MCAssembler::const_iterator it = Asm.begin(),
|
||||||
|
ie = Asm.end(); it != ie; ++it) {
|
||||||
|
WriteRelocation(Asm, Layout, *it);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
virtual void CreateMetadataSections(MCAssembler &Asm, MCAsmLayout &Layout,
|
||||||
|
const SectionIndexMapTy &SectionIndexMap);
|
||||||
|
|
||||||
|
// Create the sections that show up in the symbol table. Currently
|
||||||
|
// those are the .note.GNU-stack section and the group sections.
|
||||||
|
virtual void CreateIndexedSections(MCAssembler &Asm, MCAsmLayout &Layout,
|
||||||
|
GroupMapTy &GroupMap,
|
||||||
|
RevGroupMapTy &RevGroupMap);
|
||||||
|
|
||||||
|
virtual void ExecutePostLayoutBinding(MCAssembler &Asm,
|
||||||
|
const MCAsmLayout &Layout);
|
||||||
|
|
||||||
|
virtual void WriteSecHdrEntry(uint32_t Name, uint32_t Type, uint64_t Flags,
|
||||||
|
uint64_t Address, uint64_t Offset,
|
||||||
|
uint64_t Size, uint32_t Link, uint32_t Info,
|
||||||
|
uint64_t Alignment, uint64_t EntrySize);
|
||||||
|
|
||||||
|
virtual void WriteRelocationsFragment(const MCAssembler &Asm,
|
||||||
|
MCDataFragment *F,
|
||||||
|
const MCSectionData *SD);
|
||||||
|
|
||||||
|
virtual bool
|
||||||
|
IsSymbolRefDifferenceFullyResolvedImpl(const MCAssembler &Asm,
|
||||||
|
const MCSymbolData &DataA,
|
||||||
|
const MCFragment &FB,
|
||||||
|
bool InSet,
|
||||||
|
bool IsPCRel) const;
|
||||||
|
|
||||||
|
virtual void WriteObject(MCAssembler &Asm, const MCAsmLayout &Layout);
|
||||||
|
virtual void WriteSection(MCAssembler &Asm,
|
||||||
|
const SectionIndexMapTy &SectionIndexMap,
|
||||||
|
uint32_t GroupSymbolIndex,
|
||||||
|
uint64_t Offset, uint64_t Size, uint64_t Alignment,
|
||||||
|
const MCSectionELF &Section);
|
||||||
|
|
||||||
|
protected:
|
||||||
|
virtual unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
|
||||||
|
bool IsPCRel, bool IsRelocWithSymbol,
|
||||||
|
int64_t Addend) = 0;
|
||||||
|
};
|
||||||
|
|
||||||
|
//===- X86ELFObjectWriter -------------------------------------------===//
|
||||||
|
|
||||||
|
class X86ELFObjectWriter : public ELFObjectWriter {
|
||||||
|
public:
|
||||||
|
X86ELFObjectWriter(MCELFObjectTargetWriter *MOTW,
|
||||||
|
raw_ostream &_OS,
|
||||||
|
bool IsLittleEndian);
|
||||||
|
|
||||||
|
virtual ~X86ELFObjectWriter();
|
||||||
|
protected:
|
||||||
|
virtual unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
|
||||||
|
bool IsPCRel, bool IsRelocWithSymbol,
|
||||||
|
int64_t Addend);
|
||||||
|
};
|
||||||
|
|
||||||
|
|
||||||
|
//===- ARMELFObjectWriter -------------------------------------------===//
|
||||||
|
|
||||||
|
class ARMELFObjectWriter : public ELFObjectWriter {
|
||||||
|
public:
|
||||||
|
// FIXME: MCAssembler can't yet return the Subtarget,
|
||||||
|
enum { DefaultEABIVersion = 0x05000000U };
|
||||||
|
|
||||||
|
ARMELFObjectWriter(MCELFObjectTargetWriter *MOTW,
|
||||||
|
raw_ostream &_OS,
|
||||||
|
bool IsLittleEndian);
|
||||||
|
|
||||||
|
virtual ~ARMELFObjectWriter();
|
||||||
|
|
||||||
|
virtual void WriteEFlags();
|
||||||
|
protected:
|
||||||
|
virtual const MCSymbol *ExplicitRelSym(const MCAssembler &Asm,
|
||||||
|
const MCValue &Target,
|
||||||
|
const MCFragment &F,
|
||||||
|
bool IsBSS) const;
|
||||||
|
|
||||||
|
virtual unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
|
||||||
|
bool IsPCRel, bool IsRelocWithSymbol,
|
||||||
|
int64_t Addend);
|
||||||
|
};
|
||||||
|
|
||||||
|
//===- MBlazeELFObjectWriter -------------------------------------------===//
|
||||||
|
|
||||||
|
class MBlazeELFObjectWriter : public ELFObjectWriter {
|
||||||
|
public:
|
||||||
|
MBlazeELFObjectWriter(MCELFObjectTargetWriter *MOTW,
|
||||||
|
raw_ostream &_OS,
|
||||||
|
bool IsLittleEndian);
|
||||||
|
|
||||||
|
virtual ~MBlazeELFObjectWriter();
|
||||||
|
protected:
|
||||||
|
virtual unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
|
||||||
|
bool IsPCRel, bool IsRelocWithSymbol,
|
||||||
|
int64_t Addend);
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
||||||
|
#endif
|
||||||
@@ -11,19 +11,14 @@
|
|||||||
//
|
//
|
||||||
//===----------------------------------------------------------------------===//
|
//===----------------------------------------------------------------------===//
|
||||||
|
|
||||||
#include "llvm/MC/MCStreamer.h"
|
#include "MCELFStreamer.h"
|
||||||
|
|
||||||
#include "MCELF.h"
|
#include "MCELF.h"
|
||||||
#include "llvm/ADT/SmallPtrSet.h"
|
#include "llvm/MC/MCStreamer.h"
|
||||||
#include "llvm/MC/MCAssembler.h"
|
|
||||||
#include "llvm/MC/MCContext.h"
|
|
||||||
#include "llvm/MC/MCCodeEmitter.h"
|
#include "llvm/MC/MCCodeEmitter.h"
|
||||||
#include "llvm/MC/MCELFSymbolFlags.h"
|
#include "llvm/MC/MCELFSymbolFlags.h"
|
||||||
#include "llvm/MC/MCExpr.h"
|
#include "llvm/MC/MCExpr.h"
|
||||||
#include "llvm/MC/MCInst.h"
|
#include "llvm/MC/MCInst.h"
|
||||||
#include "llvm/MC/MCObjectStreamer.h"
|
|
||||||
#include "llvm/MC/MCSection.h"
|
#include "llvm/MC/MCSection.h"
|
||||||
#include "llvm/MC/MCSectionELF.h"
|
|
||||||
#include "llvm/MC/MCSymbol.h"
|
#include "llvm/MC/MCSymbol.h"
|
||||||
#include "llvm/MC/MCValue.h"
|
#include "llvm/MC/MCValue.h"
|
||||||
#include "llvm/Support/Debug.h"
|
#include "llvm/Support/Debug.h"
|
||||||
@@ -35,116 +30,6 @@
|
|||||||
|
|
||||||
using namespace llvm;
|
using namespace llvm;
|
||||||
|
|
||||||
namespace {
|
|
||||||
|
|
||||||
class MCELFStreamer : public MCObjectStreamer {
|
|
||||||
public:
|
|
||||||
MCELFStreamer(MCContext &Context, TargetAsmBackend &TAB,
|
|
||||||
raw_ostream &OS, MCCodeEmitter *Emitter)
|
|
||||||
: MCObjectStreamer(Context, TAB, OS, Emitter) {}
|
|
||||||
|
|
||||||
~MCELFStreamer() {}
|
|
||||||
|
|
||||||
/// @name MCStreamer Interface
|
|
||||||
/// @{
|
|
||||||
|
|
||||||
virtual void InitSections();
|
|
||||||
virtual void ChangeSection(const MCSection *Section);
|
|
||||||
virtual void EmitLabel(MCSymbol *Symbol);
|
|
||||||
virtual void EmitAssemblerFlag(MCAssemblerFlag Flag);
|
|
||||||
virtual void EmitThumbFunc(MCSymbol *Func);
|
|
||||||
virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value);
|
|
||||||
virtual void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol);
|
|
||||||
virtual void EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute);
|
|
||||||
virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {
|
|
||||||
assert(0 && "ELF doesn't support this directive");
|
|
||||||
}
|
|
||||||
virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
|
|
||||||
unsigned ByteAlignment);
|
|
||||||
virtual void BeginCOFFSymbolDef(const MCSymbol *Symbol) {
|
|
||||||
assert(0 && "ELF doesn't support this directive");
|
|
||||||
}
|
|
||||||
|
|
||||||
virtual void EmitCOFFSymbolStorageClass(int StorageClass) {
|
|
||||||
assert(0 && "ELF doesn't support this directive");
|
|
||||||
}
|
|
||||||
|
|
||||||
virtual void EmitCOFFSymbolType(int Type) {
|
|
||||||
assert(0 && "ELF doesn't support this directive");
|
|
||||||
}
|
|
||||||
|
|
||||||
virtual void EndCOFFSymbolDef() {
|
|
||||||
assert(0 && "ELF doesn't support this directive");
|
|
||||||
}
|
|
||||||
|
|
||||||
virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) {
|
|
||||||
MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol);
|
|
||||||
SD.setSize(Value);
|
|
||||||
}
|
|
||||||
|
|
||||||
virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size);
|
|
||||||
|
|
||||||
virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol = 0,
|
|
||||||
unsigned Size = 0, unsigned ByteAlignment = 0) {
|
|
||||||
assert(0 && "ELF doesn't support this directive");
|
|
||||||
}
|
|
||||||
virtual void EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
|
|
||||||
uint64_t Size, unsigned ByteAlignment = 0) {
|
|
||||||
assert(0 && "ELF doesn't support this directive");
|
|
||||||
}
|
|
||||||
virtual void EmitBytes(StringRef Data, unsigned AddrSpace);
|
|
||||||
virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0,
|
|
||||||
unsigned ValueSize = 1,
|
|
||||||
unsigned MaxBytesToEmit = 0);
|
|
||||||
virtual void EmitCodeAlignment(unsigned ByteAlignment,
|
|
||||||
unsigned MaxBytesToEmit = 0);
|
|
||||||
|
|
||||||
virtual void EmitFileDirective(StringRef Filename);
|
|
||||||
|
|
||||||
virtual void Finish();
|
|
||||||
|
|
||||||
private:
|
|
||||||
virtual void EmitInstToFragment(const MCInst &Inst);
|
|
||||||
virtual void EmitInstToData(const MCInst &Inst);
|
|
||||||
|
|
||||||
void fixSymbolsInTLSFixups(const MCExpr *expr);
|
|
||||||
|
|
||||||
struct LocalCommon {
|
|
||||||
MCSymbolData *SD;
|
|
||||||
uint64_t Size;
|
|
||||||
unsigned ByteAlignment;
|
|
||||||
};
|
|
||||||
std::vector<LocalCommon> LocalCommons;
|
|
||||||
|
|
||||||
SmallPtrSet<MCSymbol *, 16> BindingExplicitlySet;
|
|
||||||
/// @}
|
|
||||||
void SetSection(StringRef Section, unsigned Type, unsigned Flags,
|
|
||||||
SectionKind Kind) {
|
|
||||||
SwitchSection(getContext().getELFSection(Section, Type, Flags, Kind));
|
|
||||||
}
|
|
||||||
|
|
||||||
void SetSectionData() {
|
|
||||||
SetSection(".data", ELF::SHT_PROGBITS,
|
|
||||||
ELF::SHF_WRITE |ELF::SHF_ALLOC,
|
|
||||||
SectionKind::getDataRel());
|
|
||||||
EmitCodeAlignment(4, 0);
|
|
||||||
}
|
|
||||||
void SetSectionText() {
|
|
||||||
SetSection(".text", ELF::SHT_PROGBITS,
|
|
||||||
ELF::SHF_EXECINSTR |
|
|
||||||
ELF::SHF_ALLOC, SectionKind::getText());
|
|
||||||
EmitCodeAlignment(4, 0);
|
|
||||||
}
|
|
||||||
void SetSectionBss() {
|
|
||||||
SetSection(".bss", ELF::SHT_NOBITS,
|
|
||||||
ELF::SHF_WRITE |
|
|
||||||
ELF::SHF_ALLOC, SectionKind::getBSS());
|
|
||||||
EmitCodeAlignment(4, 0);
|
|
||||||
}
|
|
||||||
};
|
|
||||||
|
|
||||||
} // end anonymous namespace.
|
|
||||||
|
|
||||||
void MCELFStreamer::InitSections() {
|
void MCELFStreamer::InitSections() {
|
||||||
// This emulates the same behavior of GNU as. This makes it easier
|
// This emulates the same behavior of GNU as. This makes it easier
|
||||||
// to compare the output as the major sections are in the same order.
|
// to compare the output as the major sections are in the same order.
|
||||||
|
|||||||
268
lib/MC/MCELFStreamer.h
Normal file
268
lib/MC/MCELFStreamer.h
Normal file
@@ -0,0 +1,268 @@
|
|||||||
|
//===- lib/MC/MCELFStreamer.h - ELF Object Output -------------------------===//
|
||||||
|
//
|
||||||
|
// The LLVM Compiler Infrastructure
|
||||||
|
//
|
||||||
|
// This file is distributed under the University of Illinois Open Source
|
||||||
|
// License. See LICENSE.TXT for details.
|
||||||
|
//
|
||||||
|
//===----------------------------------------------------------------------===//
|
||||||
|
//
|
||||||
|
// This file assembles .s files and emits ELF .o object files.
|
||||||
|
//
|
||||||
|
//===----------------------------------------------------------------------===//
|
||||||
|
|
||||||
|
#ifndef LLVM_MC_MCELFSTREAMER_H
|
||||||
|
#define LLVM_MC_MCELFSTREAMER_H
|
||||||
|
|
||||||
|
#include "llvm/ADT/SmallPtrSet.h"
|
||||||
|
#include "llvm/ADT/DenseMap.h"
|
||||||
|
#include "llvm/MC/MCAssembler.h"
|
||||||
|
#include "llvm/MC/MCContext.h"
|
||||||
|
#include "llvm/MC/MCObjectStreamer.h"
|
||||||
|
#include "llvm/MC/MCSectionELF.h"
|
||||||
|
|
||||||
|
namespace llvm {
|
||||||
|
|
||||||
|
class MCELFStreamer : public MCObjectStreamer {
|
||||||
|
public:
|
||||||
|
MCELFStreamer(MCContext &Context, TargetAsmBackend &TAB,
|
||||||
|
raw_ostream &OS, MCCodeEmitter *Emitter)
|
||||||
|
: MCObjectStreamer(Context, TAB, OS, Emitter) {}
|
||||||
|
|
||||||
|
~MCELFStreamer() {}
|
||||||
|
|
||||||
|
/// @name MCStreamer Interface
|
||||||
|
/// @{
|
||||||
|
|
||||||
|
virtual void InitSections();
|
||||||
|
virtual void ChangeSection(const MCSection *Section);
|
||||||
|
virtual void EmitLabel(MCSymbol *Symbol);
|
||||||
|
virtual void EmitAssemblerFlag(MCAssemblerFlag Flag);
|
||||||
|
virtual void EmitThumbFunc(MCSymbol *Func);
|
||||||
|
virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value);
|
||||||
|
virtual void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol);
|
||||||
|
virtual void EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute);
|
||||||
|
virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {
|
||||||
|
assert(0 && "ELF doesn't support this directive");
|
||||||
|
}
|
||||||
|
virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
|
||||||
|
unsigned ByteAlignment);
|
||||||
|
virtual void BeginCOFFSymbolDef(const MCSymbol *Symbol) {
|
||||||
|
assert(0 && "ELF doesn't support this directive");
|
||||||
|
}
|
||||||
|
|
||||||
|
virtual void EmitCOFFSymbolStorageClass(int StorageClass) {
|
||||||
|
assert(0 && "ELF doesn't support this directive");
|
||||||
|
}
|
||||||
|
|
||||||
|
virtual void EmitCOFFSymbolType(int Type) {
|
||||||
|
assert(0 && "ELF doesn't support this directive");
|
||||||
|
}
|
||||||
|
|
||||||
|
virtual void EndCOFFSymbolDef() {
|
||||||
|
assert(0 && "ELF doesn't support this directive");
|
||||||
|
}
|
||||||
|
|
||||||
|
virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) {
|
||||||
|
MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol);
|
||||||
|
SD.setSize(Value);
|
||||||
|
}
|
||||||
|
|
||||||
|
virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size);
|
||||||
|
|
||||||
|
virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol = 0,
|
||||||
|
unsigned Size = 0, unsigned ByteAlignment = 0) {
|
||||||
|
assert(0 && "ELF doesn't support this directive");
|
||||||
|
}
|
||||||
|
virtual void EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
|
||||||
|
uint64_t Size, unsigned ByteAlignment = 0) {
|
||||||
|
assert(0 && "ELF doesn't support this directive");
|
||||||
|
}
|
||||||
|
virtual void EmitBytes(StringRef Data, unsigned AddrSpace);
|
||||||
|
virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0,
|
||||||
|
unsigned ValueSize = 1,
|
||||||
|
unsigned MaxBytesToEmit = 0);
|
||||||
|
virtual void EmitCodeAlignment(unsigned ByteAlignment,
|
||||||
|
unsigned MaxBytesToEmit = 0);
|
||||||
|
|
||||||
|
virtual void EmitFileDirective(StringRef Filename);
|
||||||
|
|
||||||
|
virtual void Finish();
|
||||||
|
|
||||||
|
private:
|
||||||
|
virtual void EmitInstToFragment(const MCInst &Inst);
|
||||||
|
virtual void EmitInstToData(const MCInst &Inst);
|
||||||
|
|
||||||
|
void fixSymbolsInTLSFixups(const MCExpr *expr);
|
||||||
|
|
||||||
|
struct LocalCommon {
|
||||||
|
MCSymbolData *SD;
|
||||||
|
uint64_t Size;
|
||||||
|
unsigned ByteAlignment;
|
||||||
|
};
|
||||||
|
std::vector<LocalCommon> LocalCommons;
|
||||||
|
|
||||||
|
SmallPtrSet<MCSymbol *, 16> BindingExplicitlySet;
|
||||||
|
/// @}
|
||||||
|
void SetSection(StringRef Section, unsigned Type, unsigned Flags,
|
||||||
|
SectionKind Kind) {
|
||||||
|
SwitchSection(getContext().getELFSection(Section, Type, Flags, Kind));
|
||||||
|
}
|
||||||
|
|
||||||
|
void SetSectionData() {
|
||||||
|
SetSection(".data", ELF::SHT_PROGBITS,
|
||||||
|
ELF::SHF_WRITE |ELF::SHF_ALLOC,
|
||||||
|
SectionKind::getDataRel());
|
||||||
|
EmitCodeAlignment(4, 0);
|
||||||
|
}
|
||||||
|
void SetSectionText() {
|
||||||
|
SetSection(".text", ELF::SHT_PROGBITS,
|
||||||
|
ELF::SHF_EXECINSTR |
|
||||||
|
ELF::SHF_ALLOC, SectionKind::getText());
|
||||||
|
EmitCodeAlignment(4, 0);
|
||||||
|
}
|
||||||
|
void SetSectionBss() {
|
||||||
|
SetSection(".bss", ELF::SHT_NOBITS,
|
||||||
|
ELF::SHF_WRITE |
|
||||||
|
ELF::SHF_ALLOC, SectionKind::getBSS());
|
||||||
|
EmitCodeAlignment(4, 0);
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
} // end llvm namespace
|
||||||
|
|
||||||
|
#endif
|
||||||
|
//===- lib/MC/MCELFStreamer.h - ELF Object Output -------------------------===//
|
||||||
|
//
|
||||||
|
// The LLVM Compiler Infrastructure
|
||||||
|
//
|
||||||
|
// This file is distributed under the University of Illinois Open Source
|
||||||
|
// License. See LICENSE.TXT for details.
|
||||||
|
//
|
||||||
|
//===----------------------------------------------------------------------===//
|
||||||
|
//
|
||||||
|
// This file assembles .s files and emits ELF .o object files.
|
||||||
|
//
|
||||||
|
//===----------------------------------------------------------------------===//
|
||||||
|
|
||||||
|
#ifndef LLVM_MC_MCELFSTREAMER_H
|
||||||
|
#define LLVM_MC_MCELFSTREAMER_H
|
||||||
|
|
||||||
|
#include "llvm/ADT/SmallPtrSet.h"
|
||||||
|
#include "llvm/ADT/DenseMap.h"
|
||||||
|
#include "llvm/MC/MCAssembler.h"
|
||||||
|
#include "llvm/MC/MCContext.h"
|
||||||
|
#include "llvm/MC/MCObjectStreamer.h"
|
||||||
|
#include "llvm/MC/MCSectionELF.h"
|
||||||
|
|
||||||
|
namespace llvm {
|
||||||
|
|
||||||
|
class MCELFStreamer : public MCObjectStreamer {
|
||||||
|
public:
|
||||||
|
MCELFStreamer(MCContext &Context, TargetAsmBackend &TAB,
|
||||||
|
raw_ostream &OS, MCCodeEmitter *Emitter)
|
||||||
|
: MCObjectStreamer(Context, TAB, OS, Emitter) {}
|
||||||
|
|
||||||
|
~MCELFStreamer() {}
|
||||||
|
|
||||||
|
/// @name MCStreamer Interface
|
||||||
|
/// @{
|
||||||
|
|
||||||
|
virtual void InitSections();
|
||||||
|
virtual void ChangeSection(const MCSection *Section);
|
||||||
|
virtual void EmitLabel(MCSymbol *Symbol);
|
||||||
|
virtual void EmitAssemblerFlag(MCAssemblerFlag Flag);
|
||||||
|
virtual void EmitThumbFunc(MCSymbol *Func);
|
||||||
|
virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value);
|
||||||
|
virtual void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol);
|
||||||
|
virtual void EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute);
|
||||||
|
virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {
|
||||||
|
assert(0 && "ELF doesn't support this directive");
|
||||||
|
}
|
||||||
|
virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
|
||||||
|
unsigned ByteAlignment);
|
||||||
|
virtual void BeginCOFFSymbolDef(const MCSymbol *Symbol) {
|
||||||
|
assert(0 && "ELF doesn't support this directive");
|
||||||
|
}
|
||||||
|
|
||||||
|
virtual void EmitCOFFSymbolStorageClass(int StorageClass) {
|
||||||
|
assert(0 && "ELF doesn't support this directive");
|
||||||
|
}
|
||||||
|
|
||||||
|
virtual void EmitCOFFSymbolType(int Type) {
|
||||||
|
assert(0 && "ELF doesn't support this directive");
|
||||||
|
}
|
||||||
|
|
||||||
|
virtual void EndCOFFSymbolDef() {
|
||||||
|
assert(0 && "ELF doesn't support this directive");
|
||||||
|
}
|
||||||
|
|
||||||
|
virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) {
|
||||||
|
MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol);
|
||||||
|
SD.setSize(Value);
|
||||||
|
}
|
||||||
|
|
||||||
|
virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size);
|
||||||
|
|
||||||
|
virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol = 0,
|
||||||
|
unsigned Size = 0, unsigned ByteAlignment = 0) {
|
||||||
|
assert(0 && "ELF doesn't support this directive");
|
||||||
|
}
|
||||||
|
virtual void EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
|
||||||
|
uint64_t Size, unsigned ByteAlignment = 0) {
|
||||||
|
assert(0 && "ELF doesn't support this directive");
|
||||||
|
}
|
||||||
|
virtual void EmitBytes(StringRef Data, unsigned AddrSpace);
|
||||||
|
virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0,
|
||||||
|
unsigned ValueSize = 1,
|
||||||
|
unsigned MaxBytesToEmit = 0);
|
||||||
|
virtual void EmitCodeAlignment(unsigned ByteAlignment,
|
||||||
|
unsigned MaxBytesToEmit = 0);
|
||||||
|
|
||||||
|
virtual void EmitFileDirective(StringRef Filename);
|
||||||
|
|
||||||
|
virtual void Finish();
|
||||||
|
|
||||||
|
private:
|
||||||
|
virtual void EmitInstToFragment(const MCInst &Inst);
|
||||||
|
virtual void EmitInstToData(const MCInst &Inst);
|
||||||
|
|
||||||
|
void fixSymbolsInTLSFixups(const MCExpr *expr);
|
||||||
|
|
||||||
|
struct LocalCommon {
|
||||||
|
MCSymbolData *SD;
|
||||||
|
uint64_t Size;
|
||||||
|
unsigned ByteAlignment;
|
||||||
|
};
|
||||||
|
std::vector<LocalCommon> LocalCommons;
|
||||||
|
|
||||||
|
SmallPtrSet<MCSymbol *, 16> BindingExplicitlySet;
|
||||||
|
/// @}
|
||||||
|
void SetSection(StringRef Section, unsigned Type, unsigned Flags,
|
||||||
|
SectionKind Kind) {
|
||||||
|
SwitchSection(getContext().getELFSection(Section, Type, Flags, Kind));
|
||||||
|
}
|
||||||
|
|
||||||
|
void SetSectionData() {
|
||||||
|
SetSection(".data", ELF::SHT_PROGBITS,
|
||||||
|
ELF::SHF_WRITE |ELF::SHF_ALLOC,
|
||||||
|
SectionKind::getDataRel());
|
||||||
|
EmitCodeAlignment(4, 0);
|
||||||
|
}
|
||||||
|
void SetSectionText() {
|
||||||
|
SetSection(".text", ELF::SHT_PROGBITS,
|
||||||
|
ELF::SHF_EXECINSTR |
|
||||||
|
ELF::SHF_ALLOC, SectionKind::getText());
|
||||||
|
EmitCodeAlignment(4, 0);
|
||||||
|
}
|
||||||
|
void SetSectionBss() {
|
||||||
|
SetSection(".bss", ELF::SHT_NOBITS,
|
||||||
|
ELF::SHF_WRITE |
|
||||||
|
ELF::SHF_ALLOC, SectionKind::getBSS());
|
||||||
|
EmitCodeAlignment(4, 0);
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
} // end llvm namespace
|
||||||
|
|
||||||
|
#endif
|
||||||
Reference in New Issue
Block a user