diff options
Diffstat (limited to 'contrib/llvm/lib/MC/MCStreamer.cpp')
| -rw-r--r-- | contrib/llvm/lib/MC/MCStreamer.cpp | 218 |
1 files changed, 214 insertions, 4 deletions
diff --git a/contrib/llvm/lib/MC/MCStreamer.cpp b/contrib/llvm/lib/MC/MCStreamer.cpp index 3e9d02e..3dcdba1 100644 --- a/contrib/llvm/lib/MC/MCStreamer.cpp +++ b/contrib/llvm/lib/MC/MCStreamer.cpp @@ -7,16 +7,21 @@ // //===----------------------------------------------------------------------===// +#include "llvm/MC/MCAsmInfo.h" +#include "llvm/MC/MCContext.h" #include "llvm/MC/MCStreamer.h" #include "llvm/MC/MCExpr.h" +#include "llvm/MC/MCObjectWriter.h" +#include "llvm/Support/ErrorHandling.h" #include "llvm/Support/raw_ostream.h" #include "llvm/ADT/SmallString.h" #include "llvm/ADT/Twine.h" #include <cstdlib> using namespace llvm; -MCStreamer::MCStreamer(MCContext &Ctx) : Context(Ctx), CurSection(0), - PrevSection(0) { +MCStreamer::MCStreamer(MCContext &Ctx) : Context(Ctx) { + PrevSectionStack.push_back(NULL); + CurSectionStack.push_back(NULL); } MCStreamer::~MCStreamer() { @@ -27,17 +32,90 @@ raw_ostream &MCStreamer::GetCommentOS() { return nulls(); } +void MCStreamer::EmitDwarfSetLineAddr(int64_t LineDelta, + const MCSymbol *Label, int PointerSize) { + // emit the sequence to set the address + EmitIntValue(dwarf::DW_LNS_extended_op, 1); + EmitULEB128IntValue(PointerSize + 1); + EmitIntValue(dwarf::DW_LNE_set_address, 1); + EmitSymbolValue(Label, PointerSize); + + // emit the sequence for the LineDelta (from 1) and a zero address delta. + MCDwarfLineAddr::Emit(this, LineDelta, 0); +} /// EmitIntValue - Special case of EmitValue that avoids the client having to /// pass in a MCExpr for constant integers. void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size, unsigned AddrSpace) { - EmitValue(MCConstantExpr::Create(Value, getContext()), Size, AddrSpace); + assert(Size <= 8 && "Invalid size"); + assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) && + "Invalid size"); + char buf[8]; + // FIXME: Endianness assumption. + for (unsigned i = 0; i != Size; ++i) + buf[i] = uint8_t(Value >> (i * 8)); + EmitBytes(StringRef(buf, Size), AddrSpace); +} + +/// EmitULEB128Value - Special case of EmitULEB128Value that avoids the +/// client having to pass in a MCExpr for constant integers. +void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned AddrSpace) { + SmallString<32> Tmp; + raw_svector_ostream OSE(Tmp); + MCObjectWriter::EncodeULEB128(Value, OSE); + EmitBytes(OSE.str(), AddrSpace); +} + +/// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the +/// client having to pass in a MCExpr for constant integers. +void MCStreamer::EmitSLEB128IntValue(int64_t Value, unsigned AddrSpace) { + SmallString<32> Tmp; + raw_svector_ostream OSE(Tmp); + MCObjectWriter::EncodeSLEB128(Value, OSE); + EmitBytes(OSE.str(), AddrSpace); +} + +void MCStreamer::EmitAbsValue(const MCExpr *Value, unsigned Size, + unsigned AddrSpace) { + if (getContext().getAsmInfo().hasAggressiveSymbolFolding()) { + EmitValue(Value, Size, AddrSpace); + return; + } + MCSymbol *ABS = getContext().CreateTempSymbol(); + EmitAssignment(ABS, Value); + EmitSymbolValue(ABS, Size, AddrSpace); +} + + +void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size, + unsigned AddrSpace) { + EmitValueImpl(Value, Size, false, AddrSpace); +} + +void MCStreamer::EmitPCRelValue(const MCExpr *Value, unsigned Size, + unsigned AddrSpace) { + EmitValueImpl(Value, Size, true, AddrSpace); +} + +void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size, + bool isPCRel, unsigned AddrSpace) { + EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size, isPCRel, + AddrSpace); } void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size, unsigned AddrSpace) { - EmitValue(MCSymbolRefExpr::Create(Sym, getContext()), Size, AddrSpace); + EmitSymbolValue(Sym, Size, false, AddrSpace); +} + +void MCStreamer::EmitPCRelSymbolValue(const MCSymbol *Sym, unsigned Size, + unsigned AddrSpace) { + EmitSymbolValue(Sym, Size, true, AddrSpace); +} + +void MCStreamer::EmitGPRel32Value(const MCExpr *Value) { + report_fatal_error("unsupported directive in streamer"); } /// EmitFill - Emit NumBytes bytes worth of the value specified by @@ -49,6 +127,138 @@ void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue, EmitValue(E, 1, AddrSpace); } +bool MCStreamer::EmitDwarfFileDirective(unsigned FileNo, + StringRef Filename) { + return getContext().GetDwarfFile(Filename, FileNo) == 0; +} + +void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line, + unsigned Column, unsigned Flags, + unsigned Isa, + unsigned Discriminator) { + getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa, + Discriminator); +} + +MCDwarfFrameInfo *MCStreamer::getCurrentFrameInfo() { + if (FrameInfos.empty()) + return NULL; + return &FrameInfos.back(); +} + +void MCStreamer::EnsureValidFrame() { + MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); + if (!CurFrame || CurFrame->End) + report_fatal_error("No open frame"); +} + +bool MCStreamer::EmitCFIStartProc() { + MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); + if (CurFrame && !CurFrame->End) { + report_fatal_error("Starting a frame before finishing the previous one!"); + return true; + } + MCDwarfFrameInfo Frame; + Frame.Begin = getContext().CreateTempSymbol(); + EmitLabel(Frame.Begin); + FrameInfos.push_back(Frame); + return false; +} + +bool MCStreamer::EmitCFIEndProc() { + EnsureValidFrame(); + MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); + CurFrame->End = getContext().CreateTempSymbol(); + EmitLabel(CurFrame->End); + return false; +} + +bool MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) { + EnsureValidFrame(); + MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); + MCSymbol *Label = getContext().CreateTempSymbol(); + EmitLabel(Label); + MachineLocation Dest(MachineLocation::VirtualFP); + MachineLocation Source(Register, -Offset); + MCCFIInstruction Instruction(Label, Dest, Source); + CurFrame->Instructions.push_back(Instruction); + return false; +} + +bool MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) { + EnsureValidFrame(); + MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); + MCSymbol *Label = getContext().CreateTempSymbol(); + EmitLabel(Label); + MachineLocation Dest(MachineLocation::VirtualFP); + MachineLocation Source(MachineLocation::VirtualFP, -Offset); + MCCFIInstruction Instruction(Label, Dest, Source); + CurFrame->Instructions.push_back(Instruction); + return false; +} + +bool MCStreamer::EmitCFIDefCfaRegister(int64_t Register) { + EnsureValidFrame(); + MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); + MCSymbol *Label = getContext().CreateTempSymbol(); + EmitLabel(Label); + MachineLocation Dest(Register); + MachineLocation Source(MachineLocation::VirtualFP); + MCCFIInstruction Instruction(Label, Dest, Source); + CurFrame->Instructions.push_back(Instruction); + return false; +} + +bool MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) { + EnsureValidFrame(); + MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); + MCSymbol *Label = getContext().CreateTempSymbol(); + EmitLabel(Label); + MachineLocation Dest(Register, Offset); + MachineLocation Source(Register, Offset); + MCCFIInstruction Instruction(Label, Dest, Source); + CurFrame->Instructions.push_back(Instruction); + return false; +} + +bool MCStreamer::EmitCFIPersonality(const MCSymbol *Sym, + unsigned Encoding) { + EnsureValidFrame(); + MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); + CurFrame->Personality = Sym; + CurFrame->PersonalityEncoding = Encoding; + return false; +} + +bool MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) { + EnsureValidFrame(); + MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); + CurFrame->Lsda = Sym; + CurFrame->LsdaEncoding = Encoding; + return false; +} + +bool MCStreamer::EmitCFIRememberState() { + EnsureValidFrame(); + MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); + MCSymbol *Label = getContext().CreateTempSymbol(); + EmitLabel(Label); + MCCFIInstruction Instruction(MCCFIInstruction::Remember, Label); + CurFrame->Instructions.push_back(Instruction); + return false; +} + +bool MCStreamer::EmitCFIRestoreState() { + // FIXME: Error if there is no matching cfi_remember_state. + EnsureValidFrame(); + MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); + MCSymbol *Label = getContext().CreateTempSymbol(); + EmitLabel(Label); + MCCFIInstruction Instruction(MCCFIInstruction::Restore, Label); + CurFrame->Instructions.push_back(Instruction); + return false; +} + /// EmitRawText - If this file is backed by an assembly streamer, this dumps /// the specified string in the output .s file. This capability is /// indicated by the hasRawTextSupport() predicate. |
