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364 lines
13 KiB
C++
364 lines
13 KiB
C++
//===-- llvm/MC/MCObjectFileInfo.h - Object File Info -----------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file describes common object file formats.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_MC_MCOBJECTFILEINFO_H
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#define LLVM_MC_MCOBJECTFILEINFO_H
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#include "llvm/ADT/Triple.h"
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#include "llvm/Support/CodeGen.h"
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namespace llvm {
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class MCContext;
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class MCSection;
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class MCObjectFileInfo {
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protected:
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/// True if .comm supports alignment. This is a hack for as long as we
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/// support 10.4 Tiger, whose assembler doesn't support alignment on comm.
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bool CommDirectiveSupportsAlignment;
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/// True if target object file supports a weak_definition of constant 0 for an
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/// omitted EH frame.
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bool SupportsWeakOmittedEHFrame;
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/// True if the target object file supports emitting a compact unwind section
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/// without an associated EH frame section.
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bool SupportsCompactUnwindWithoutEHFrame;
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/// OmitDwarfIfHaveCompactUnwind - True if the target object file
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/// supports having some functions with compact unwind and other with
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/// dwarf unwind.
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bool OmitDwarfIfHaveCompactUnwind;
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/// PersonalityEncoding, LSDAEncoding, TTypeEncoding - Some encoding values
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/// for EH.
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unsigned PersonalityEncoding;
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unsigned LSDAEncoding;
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unsigned FDECFIEncoding;
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unsigned TTypeEncoding;
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/// Compact unwind encoding indicating that we should emit only an EH frame.
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unsigned CompactUnwindDwarfEHFrameOnly;
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/// Section directive for standard text.
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MCSection *TextSection;
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/// Section directive for standard data.
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MCSection *DataSection;
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/// Section that is default initialized to zero.
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MCSection *BSSSection;
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/// Section that is readonly and can contain arbitrary initialized data.
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/// Targets are not required to have a readonly section. If they don't,
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/// various bits of code will fall back to using the data section for
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/// constants.
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MCSection *ReadOnlySection;
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/// If exception handling is supported by the target, this is the section the
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/// Language Specific Data Area information is emitted to.
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MCSection *LSDASection;
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/// If exception handling is supported by the target and the target can
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/// support a compact representation of the CIE and FDE, this is the section
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/// to emit them into.
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MCSection *CompactUnwindSection;
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// Dwarf sections for debug info. If a target supports debug info, these must
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// be set.
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MCSection *DwarfAbbrevSection;
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MCSection *DwarfInfoSection;
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MCSection *DwarfLineSection;
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MCSection *DwarfFrameSection;
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MCSection *DwarfPubTypesSection;
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const MCSection *DwarfDebugInlineSection;
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MCSection *DwarfStrSection;
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MCSection *DwarfLocSection;
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MCSection *DwarfARangesSection;
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MCSection *DwarfRangesSection;
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MCSection *DwarfMacinfoSection;
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// The pubnames section is no longer generated by default. The generation
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// can be enabled by a compiler flag.
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MCSection *DwarfPubNamesSection;
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/// DWARF5 Experimental Debug Info Sections
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/// DwarfAccelNamesSection, DwarfAccelObjCSection,
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/// DwarfAccelNamespaceSection, DwarfAccelTypesSection -
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/// If we use the DWARF accelerated hash tables then we want to emit these
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/// sections.
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MCSection *DwarfAccelNamesSection;
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MCSection *DwarfAccelObjCSection;
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MCSection *DwarfAccelNamespaceSection;
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MCSection *DwarfAccelTypesSection;
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// These are used for the Fission separate debug information files.
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MCSection *DwarfInfoDWOSection;
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MCSection *DwarfTypesDWOSection;
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MCSection *DwarfAbbrevDWOSection;
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MCSection *DwarfStrDWOSection;
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MCSection *DwarfLineDWOSection;
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MCSection *DwarfLocDWOSection;
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MCSection *DwarfStrOffDWOSection;
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MCSection *DwarfAddrSection;
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// These are for Fission DWP files.
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MCSection *DwarfCUIndexSection;
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MCSection *DwarfTUIndexSection;
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/// Section for newer gnu pubnames.
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MCSection *DwarfGnuPubNamesSection;
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/// Section for newer gnu pubtypes.
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MCSection *DwarfGnuPubTypesSection;
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MCSection *COFFDebugSymbolsSection;
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MCSection *COFFDebugTypesSection;
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/// Extra TLS Variable Data section.
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///
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/// If the target needs to put additional information for a TLS variable,
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/// it'll go here.
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MCSection *TLSExtraDataSection;
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/// Section directive for Thread Local data. ELF, MachO and COFF.
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MCSection *TLSDataSection; // Defaults to ".tdata".
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/// Section directive for Thread Local uninitialized data.
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///
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/// Null if this target doesn't support a BSS section. ELF and MachO only.
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MCSection *TLSBSSSection; // Defaults to ".tbss".
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/// StackMap section.
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MCSection *StackMapSection;
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/// FaultMap section.
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MCSection *FaultMapSection;
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/// EH frame section.
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///
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/// It is initialized on demand so it can be overwritten (with uniquing).
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MCSection *EHFrameSection;
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// ELF specific sections.
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MCSection *DataRelROSection;
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MCSection *MergeableConst4Section;
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MCSection *MergeableConst8Section;
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MCSection *MergeableConst16Section;
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MCSection *MergeableConst32Section;
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// MachO specific sections.
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/// Section for thread local structure information.
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///
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/// Contains the source code name of the variable, visibility and a pointer to
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/// the initial value (.tdata or .tbss).
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MCSection *TLSTLVSection; // Defaults to ".tlv".
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/// Section for thread local data initialization functions.
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const MCSection *TLSThreadInitSection; // Defaults to ".thread_init_func".
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MCSection *CStringSection;
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MCSection *UStringSection;
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MCSection *TextCoalSection;
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MCSection *ConstTextCoalSection;
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MCSection *ConstDataSection;
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MCSection *DataCoalSection;
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MCSection *DataCommonSection;
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MCSection *DataBSSSection;
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MCSection *FourByteConstantSection;
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MCSection *EightByteConstantSection;
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MCSection *SixteenByteConstantSection;
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MCSection *LazySymbolPointerSection;
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MCSection *NonLazySymbolPointerSection;
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MCSection *ThreadLocalPointerSection;
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/// COFF specific sections.
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MCSection *DrectveSection;
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MCSection *PDataSection;
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MCSection *XDataSection;
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MCSection *SXDataSection;
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public:
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void InitMCObjectFileInfo(const Triple &TT, bool PIC, CodeModel::Model CM,
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MCContext &ctx);
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bool getSupportsWeakOmittedEHFrame() const {
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return SupportsWeakOmittedEHFrame;
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}
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bool getSupportsCompactUnwindWithoutEHFrame() const {
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return SupportsCompactUnwindWithoutEHFrame;
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}
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bool getOmitDwarfIfHaveCompactUnwind() const {
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return OmitDwarfIfHaveCompactUnwind;
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}
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bool getCommDirectiveSupportsAlignment() const {
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return CommDirectiveSupportsAlignment;
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}
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unsigned getPersonalityEncoding() const { return PersonalityEncoding; }
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unsigned getLSDAEncoding() const { return LSDAEncoding; }
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unsigned getFDEEncoding() const { return FDECFIEncoding; }
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unsigned getTTypeEncoding() const { return TTypeEncoding; }
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unsigned getCompactUnwindDwarfEHFrameOnly() const {
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return CompactUnwindDwarfEHFrameOnly;
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}
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MCSection *getTextSection() const { return TextSection; }
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MCSection *getDataSection() const { return DataSection; }
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MCSection *getBSSSection() const { return BSSSection; }
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MCSection *getReadOnlySection() const { return ReadOnlySection; }
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MCSection *getLSDASection() const { return LSDASection; }
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MCSection *getCompactUnwindSection() const { return CompactUnwindSection; }
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MCSection *getDwarfAbbrevSection() const { return DwarfAbbrevSection; }
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MCSection *getDwarfInfoSection() const { return DwarfInfoSection; }
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MCSection *getDwarfLineSection() const { return DwarfLineSection; }
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MCSection *getDwarfFrameSection() const { return DwarfFrameSection; }
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MCSection *getDwarfPubNamesSection() const { return DwarfPubNamesSection; }
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MCSection *getDwarfPubTypesSection() const { return DwarfPubTypesSection; }
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MCSection *getDwarfGnuPubNamesSection() const {
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return DwarfGnuPubNamesSection;
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}
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MCSection *getDwarfGnuPubTypesSection() const {
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return DwarfGnuPubTypesSection;
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}
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const MCSection *getDwarfDebugInlineSection() const {
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return DwarfDebugInlineSection;
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}
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MCSection *getDwarfStrSection() const { return DwarfStrSection; }
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MCSection *getDwarfLocSection() const { return DwarfLocSection; }
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MCSection *getDwarfARangesSection() const { return DwarfARangesSection; }
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MCSection *getDwarfRangesSection() const { return DwarfRangesSection; }
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MCSection *getDwarfMacinfoSection() const { return DwarfMacinfoSection; }
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// DWARF5 Experimental Debug Info Sections
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MCSection *getDwarfAccelNamesSection() const {
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return DwarfAccelNamesSection;
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}
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MCSection *getDwarfAccelObjCSection() const { return DwarfAccelObjCSection; }
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MCSection *getDwarfAccelNamespaceSection() const {
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return DwarfAccelNamespaceSection;
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}
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MCSection *getDwarfAccelTypesSection() const {
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return DwarfAccelTypesSection;
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}
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MCSection *getDwarfInfoDWOSection() const { return DwarfInfoDWOSection; }
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MCSection *getDwarfTypesSection(uint64_t Hash) const;
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MCSection *getDwarfTypesDWOSection() const { return DwarfTypesDWOSection; }
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MCSection *getDwarfAbbrevDWOSection() const { return DwarfAbbrevDWOSection; }
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MCSection *getDwarfStrDWOSection() const { return DwarfStrDWOSection; }
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MCSection *getDwarfLineDWOSection() const { return DwarfLineDWOSection; }
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MCSection *getDwarfLocDWOSection() const { return DwarfLocDWOSection; }
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MCSection *getDwarfStrOffDWOSection() const { return DwarfStrOffDWOSection; }
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MCSection *getDwarfAddrSection() const { return DwarfAddrSection; }
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MCSection *getDwarfCUIndexSection() const { return DwarfCUIndexSection; }
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MCSection *getDwarfTUIndexSection() const { return DwarfTUIndexSection; }
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MCSection *getCOFFDebugSymbolsSection() const {
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return COFFDebugSymbolsSection;
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}
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MCSection *getCOFFDebugTypesSection() const {
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return COFFDebugTypesSection;
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}
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MCSection *getTLSExtraDataSection() const { return TLSExtraDataSection; }
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const MCSection *getTLSDataSection() const { return TLSDataSection; }
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MCSection *getTLSBSSSection() const { return TLSBSSSection; }
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MCSection *getStackMapSection() const { return StackMapSection; }
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MCSection *getFaultMapSection() const { return FaultMapSection; }
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// ELF specific sections.
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MCSection *getDataRelROSection() const { return DataRelROSection; }
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const MCSection *getMergeableConst4Section() const {
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return MergeableConst4Section;
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}
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const MCSection *getMergeableConst8Section() const {
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return MergeableConst8Section;
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}
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const MCSection *getMergeableConst16Section() const {
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return MergeableConst16Section;
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}
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const MCSection *getMergeableConst32Section() const {
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return MergeableConst32Section;
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}
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// MachO specific sections.
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const MCSection *getTLSTLVSection() const { return TLSTLVSection; }
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const MCSection *getTLSThreadInitSection() const {
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return TLSThreadInitSection;
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}
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const MCSection *getCStringSection() const { return CStringSection; }
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const MCSection *getUStringSection() const { return UStringSection; }
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MCSection *getTextCoalSection() const { return TextCoalSection; }
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const MCSection *getConstTextCoalSection() const {
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return ConstTextCoalSection;
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}
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const MCSection *getConstDataSection() const { return ConstDataSection; }
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const MCSection *getDataCoalSection() const { return DataCoalSection; }
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const MCSection *getDataCommonSection() const { return DataCommonSection; }
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MCSection *getDataBSSSection() const { return DataBSSSection; }
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const MCSection *getFourByteConstantSection() const {
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return FourByteConstantSection;
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}
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const MCSection *getEightByteConstantSection() const {
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return EightByteConstantSection;
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}
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const MCSection *getSixteenByteConstantSection() const {
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return SixteenByteConstantSection;
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}
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MCSection *getLazySymbolPointerSection() const {
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return LazySymbolPointerSection;
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}
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MCSection *getNonLazySymbolPointerSection() const {
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return NonLazySymbolPointerSection;
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}
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MCSection *getThreadLocalPointerSection() const {
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return ThreadLocalPointerSection;
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}
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// COFF specific sections.
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MCSection *getDrectveSection() const { return DrectveSection; }
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MCSection *getPDataSection() const { return PDataSection; }
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MCSection *getXDataSection() const { return XDataSection; }
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MCSection *getSXDataSection() const { return SXDataSection; }
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MCSection *getEHFrameSection() {
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return EHFrameSection;
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}
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enum Environment { IsMachO, IsELF, IsCOFF };
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Environment getObjectFileType() const { return Env; }
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bool isPositionIndependent() const { return PositionIndependent; }
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private:
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Environment Env;
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bool PositionIndependent;
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CodeModel::Model CMModel;
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MCContext *Ctx;
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Triple TT;
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void initMachOMCObjectFileInfo(const Triple &T);
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void initELFMCObjectFileInfo(const Triple &T);
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void initCOFFMCObjectFileInfo(const Triple &T);
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public:
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const Triple &getTargetTriple() const { return TT; }
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};
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} // end namespace llvm
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#endif
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