From: Daniel Dunbar Date: Thu, 25 Mar 2010 02:00:02 +0000 (+0000) Subject: MC: Route access to Fragment offset and effective size through MCAsmLayout. X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=432cd5fd9b4c97f1e4a53fcf45e16f7dd6bc085e;p=oota-llvm.git MC: Route access to Fragment offset and effective size through MCAsmLayout. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99473 91177308-0d34-0410-b5e6-96231b3b80d8 --- diff --git a/include/llvm/MC/MCAsmLayout.h b/include/llvm/MC/MCAsmLayout.h index 2c26ff02964..9b9cdf2c8d9 100644 --- a/include/llvm/MC/MCAsmLayout.h +++ b/include/llvm/MC/MCAsmLayout.h @@ -35,6 +35,12 @@ public: uint64_t getFragmentAddress(const MCFragment *F) const; + uint64_t getFragmentEffectiveSize(const MCFragment *F) const; + void setFragmentEffectiveSize(MCFragment *F, uint64_t Value); + + uint64_t getFragmentOffset(const MCFragment *F) const; + void setFragmentOffset(MCFragment *F, uint64_t Value); + uint64_t getSectionAddress(const MCSectionData *SD) const; uint64_t getSymbolAddress(const MCSymbolData *SD) const; diff --git a/include/llvm/MC/MCAssembler.h b/include/llvm/MC/MCAssembler.h index 51fb88bf33a..327b0b8fea5 100644 --- a/include/llvm/MC/MCAssembler.h +++ b/include/llvm/MC/MCAssembler.h @@ -87,8 +87,9 @@ private: /// initialized. uint64_t Offset; - /// FileSize - The file size of this section. This is ~0 until initialized. - uint64_t FileSize; + /// EffectiveSize - The compute size of this section. This is ~0 until + /// initialized. + uint64_t EffectiveSize; /// @} @@ -105,25 +106,6 @@ public: MCSectionData *getParent() const { return Parent; } void setParent(MCSectionData *Value) { Parent = Value; } - /// @name Assembler Backend Support - /// @{ - // - // FIXME: This could all be kept private to the assembler implementation. - - uint64_t getFileSize() const { - assert(FileSize != ~UINT64_C(0) && "File size not set!"); - return FileSize; - } - void setFileSize(uint64_t Value) { FileSize = Value; } - - uint64_t getOffset() const { - assert(Offset != ~UINT64_C(0) && "File offset not set!"); - return Offset; - } - void setOffset(uint64_t Value) { Offset = Value; } - - /// @} - static bool classof(const MCFragment *O) { return true; } virtual void dump(); @@ -711,7 +693,8 @@ public: /// Emit the section contents using the given object writer. // // FIXME: Should MCAssembler always have a reference to the object writer? - void WriteSectionData(const MCSectionData *Section, MCObjectWriter *OW) const; + void WriteSectionData(const MCSectionData *Section, const MCAsmLayout &Layout, + MCObjectWriter *OW) const; public: /// Construct a new assembler instance. diff --git a/lib/MC/MCAssembler.cpp b/lib/MC/MCAssembler.cpp index 3fac6c83349..c8d3c845f28 100644 --- a/lib/MC/MCAssembler.cpp +++ b/lib/MC/MCAssembler.cpp @@ -47,7 +47,25 @@ STATISTIC(ObjectBytes, "Number of emitted object file bytes"); uint64_t MCAsmLayout::getFragmentAddress(const MCFragment *F) const { assert(F->getParent() && "Missing section()!"); - return getSectionAddress(F->getParent()) + F->getOffset(); + return getSectionAddress(F->getParent()) + getFragmentOffset(F); +} + +uint64_t MCAsmLayout::getFragmentEffectiveSize(const MCFragment *F) const { + assert(F->EffectiveSize != ~UINT64_C(0) && "Address not set!"); + return F->EffectiveSize; +} + +void MCAsmLayout::setFragmentEffectiveSize(MCFragment *F, uint64_t Value) { + F->EffectiveSize = Value; +} + +uint64_t MCAsmLayout::getFragmentOffset(const MCFragment *F) const { + assert(F->Offset != ~UINT64_C(0) && "Address not set!"); + return F->Offset; +} + +void MCAsmLayout::setFragmentOffset(MCFragment *F, uint64_t Value) { + F->Offset = Value; } uint64_t MCAsmLayout::getSymbolAddress(const MCSymbolData *SD) const { @@ -72,7 +90,7 @@ MCFragment::MCFragment() : Kind(FragmentType(~0)) { MCFragment::MCFragment(FragmentType _Kind, MCSectionData *_Parent) : Kind(_Kind), Parent(_Parent), - FileSize(~UINT64_C(0)) + EffectiveSize(~UINT64_C(0)) { if (Parent) Parent->getFragmentList().push_back(this); @@ -335,33 +353,33 @@ void MCAssembler::LayoutSection(MCSectionData &SD, for (MCSectionData::iterator it = SD.begin(), ie = SD.end(); it != ie; ++it) { MCFragment &F = *it; - F.setOffset(Address - StartAddress); + uint64_t FragmentOffset = Address - StartAddress; + Layout.setFragmentOffset(&F, FragmentOffset); // Evaluate fragment size. + uint64_t EffectiveSize = 0; switch (F.getKind()) { case MCFragment::FT_Align: { MCAlignFragment &AF = cast(F); - uint64_t Size = OffsetToAlignment(Address, AF.getAlignment()); - if (Size > AF.getMaxBytesToEmit()) - AF.setFileSize(0); - else - AF.setFileSize(Size); + EffectiveSize = OffsetToAlignment(Address, AF.getAlignment()); + if (EffectiveSize > AF.getMaxBytesToEmit()) + EffectiveSize = 0; break; } case MCFragment::FT_Data: - F.setFileSize(cast(F).getContents().size()); + EffectiveSize = cast(F).getContents().size(); break; case MCFragment::FT_Fill: { MCFillFragment &FF = cast(F); - F.setFileSize(FF.getValueSize() * FF.getCount()); + EffectiveSize = FF.getValueSize() * FF.getCount(); break; } case MCFragment::FT_Inst: - F.setFileSize(cast(F).getInstSize()); + EffectiveSize = cast(F).getInstSize(); break; case MCFragment::FT_Org: { @@ -372,12 +390,12 @@ void MCAssembler::LayoutSection(MCSectionData &SD, llvm_report_error("expected assembly-time absolute expression"); // FIXME: We need a way to communicate this error. - int64_t Offset = TargetLocation - F.getOffset(); + int64_t Offset = TargetLocation - FragmentOffset; if (Offset < 0) llvm_report_error("invalid .org offset '" + Twine(TargetLocation) + - "' (at offset '" + Twine(F.getOffset()) + "'"); + "' (at offset '" + Twine(FragmentOffset) + "'"); - F.setFileSize(Offset); + EffectiveSize = Offset; break; } @@ -386,16 +404,18 @@ void MCAssembler::LayoutSection(MCSectionData &SD, // Align the fragment offset; it is safe to adjust the offset freely since // this is only in virtual sections. + // + // FIXME: We shouldn't be doing this here. Address = RoundUpToAlignment(Address, ZFF.getAlignment()); - F.setOffset(Address - StartAddress); + Layout.setFragmentOffset(&F, Address - StartAddress); - // FIXME: This is misnamed. - F.setFileSize(ZFF.getSize()); + EffectiveSize = ZFF.getSize(); break; } } - Address += F.getFileSize(); + Layout.setFragmentEffectiveSize(&F, EffectiveSize); + Address += EffectiveSize; } // Set the section sizes. @@ -407,27 +427,28 @@ void MCAssembler::LayoutSection(MCSectionData &SD, } /// WriteFragmentData - Write the \arg F data to the output file. -static void WriteFragmentData(const MCAssembler &Asm, const MCFragment &F, - MCObjectWriter *OW) { +static void WriteFragmentData(const MCAssembler &Asm, const MCAsmLayout &Layout, + const MCFragment &F, MCObjectWriter *OW) { uint64_t Start = OW->getStream().tell(); (void) Start; ++stats::EmittedFragments; // FIXME: Embed in fragments instead? + uint64_t FragmentSize = Layout.getFragmentEffectiveSize(&F); switch (F.getKind()) { case MCFragment::FT_Align: { MCAlignFragment &AF = cast(F); - uint64_t Count = AF.getFileSize() / AF.getValueSize(); + uint64_t Count = FragmentSize / AF.getValueSize(); // FIXME: This error shouldn't actually occur (the front end should emit // multiple .align directives to enforce the semantics it wants), but is // severe enough that we want to report it. How to handle this? - if (Count * AF.getValueSize() != AF.getFileSize()) + if (Count * AF.getValueSize() != FragmentSize) llvm_report_error("undefined .align directive, value size '" + Twine(AF.getValueSize()) + "' is not a divisor of padding size '" + - Twine(AF.getFileSize()) + "'"); + Twine(FragmentSize) + "'"); // See if we are aligning with nops, and if so do that first to try to fill // the Count bytes. Then if that did not fill any bytes or there are any @@ -456,7 +477,7 @@ static void WriteFragmentData(const MCAssembler &Asm, const MCFragment &F, case MCFragment::FT_Data: { MCDataFragment &DF = cast(F); - assert(DF.getFileSize() == DF.getContents().size() && "Invalid size!"); + assert(FragmentSize == DF.getContents().size() && "Invalid size!"); OW->WriteBytes(DF.getContents().str()); break; } @@ -483,7 +504,7 @@ static void WriteFragmentData(const MCAssembler &Asm, const MCFragment &F, case MCFragment::FT_Org: { MCOrgFragment &OF = cast(F); - for (uint64_t i = 0, e = OF.getFileSize(); i != e; ++i) + for (uint64_t i = 0, e = FragmentSize; i != e; ++i) OW->Write8(uint8_t(OF.getValue())); break; @@ -495,10 +516,11 @@ static void WriteFragmentData(const MCAssembler &Asm, const MCFragment &F, } } - assert(OW->getStream().tell() - Start == F.getFileSize()); + assert(OW->getStream().tell() - Start == FragmentSize); } void MCAssembler::WriteSectionData(const MCSectionData *SD, + const MCAsmLayout &Layout, MCObjectWriter *OW) const { // Ignore virtual sections. if (getBackend().isVirtualSection(SD->getSection())) { @@ -511,7 +533,7 @@ void MCAssembler::WriteSectionData(const MCSectionData *SD, for (MCSectionData::const_iterator it = SD->begin(), ie = SD->end(); it != ie; ++it) - WriteFragmentData(*this, *it, OW); + WriteFragmentData(*this, Layout, *it, OW); // Add section padding. assert(SD->getFileSize() >= SD->getSize() && "Invalid section sizes!"); @@ -735,9 +757,11 @@ void MCAssembler::FinishLayout(MCAsmLayout &Layout) { SD.getFragmentList().insert(it2, DF); // Update the data fragments layout data. + // + // FIXME: Add MCAsmLayout utility for this. DF->setParent(IF->getParent()); - DF->setOffset(IF->getOffset()); - DF->setFileSize(IF->getInstSize()); + Layout.setFragmentOffset(DF, Layout.getFragmentOffset(IF)); + Layout.setFragmentEffectiveSize(DF, Layout.getFragmentEffectiveSize(IF)); // Copy in the data and the fixups. DF->getContents().append(IF->getCode().begin(), IF->getCode().end()); @@ -767,7 +791,7 @@ void MCFragment::dump() { raw_ostream &OS = llvm::errs(); OS << ""; } diff --git a/lib/MC/MachObjectWriter.cpp b/lib/MC/MachObjectWriter.cpp index 39dfac158a5..72e581bc0ab 100644 --- a/lib/MC/MachObjectWriter.cpp +++ b/lib/MC/MachObjectWriter.cpp @@ -461,7 +461,7 @@ public: unsigned Log2Size = getFixupKindLog2Size(Fixup.Kind); // See . - uint32_t Address = Fragment->getOffset() + Fixup.Offset; + uint32_t Address = Layout.getFragmentOffset(Fragment) + Fixup.Offset; int64_t Value = 0; unsigned Index = 0; unsigned IsExtern = 0; @@ -645,7 +645,7 @@ public: const MCFragment *Fragment, const MCAsmFixup &Fixup, MCValue Target, uint64_t &FixedValue) { - uint32_t Address = Fragment->getOffset() + Fixup.Offset; + uint32_t Address = Layout.getFragmentOffset(Fragment) + Fixup.Offset; unsigned IsPCRel = isFixupKindPCRel(Fixup.Kind); unsigned Log2Size = getFixupKindLog2Size(Fixup.Kind); unsigned Type = RIT_Vanilla; @@ -723,7 +723,7 @@ public: } // See . - uint32_t Address = Fragment->getOffset() + Fixup.Offset; + uint32_t Address = Layout.getFragmentOffset(Fragment) + Fixup.Offset; uint32_t Value = 0; unsigned Index = 0; unsigned IsExtern = 0; @@ -1036,7 +1036,7 @@ public: // Write the actual section data. for (MCAssembler::const_iterator it = Asm.begin(), ie = Asm.end(); it != ie; ++it) - Asm.WriteSectionData(it, Writer); + Asm.WriteSectionData(it, Layout, Writer); // Write the extra padding. WriteZeros(SectionDataPadding);