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326 lines
12 KiB
C++
326 lines
12 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_MCBJECTFILEINFO_H
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#define LLVM_MC_MCBJECTFILEINFO_H
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#include "llvm/MC/MCCodeGenInfo.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/MC/SectionKind.h"
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namespace llvm {
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class MCContext;
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class MCSection;
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class Triple;
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namespace Structors {
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enum OutputOrder { None, PriorityOrder, ReversePriorityOrder };
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}
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class MCObjectFileInfo {
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protected:
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/// CommDirectiveSupportsAlignment - True if .comm supports alignment. This
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/// is a hack for as long as we support 10.4 Tiger, whose assembler doesn't
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/// support alignment on comm.
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bool CommDirectiveSupportsAlignment;
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/// SupportsWeakEmptyEHFrame - True if target object file supports a
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/// weak_definition of constant 0 for an omitted EH frame.
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bool SupportsWeakOmittedEHFrame;
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/// IsFunctionEHFrameSymbolPrivate - This flag is set to true if the
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/// "EH_frame" symbol for EH information should be an assembler temporary (aka
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/// private linkage, aka an L or .L label) or false if it should be a normal
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/// non-.globl label. This defaults to true.
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bool IsFunctionEHFrameSymbolPrivate;
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/// PersonalityEncoding, LSDAEncoding, FDEEncoding, TTypeEncoding - Some
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/// encoding values for EH.
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unsigned PersonalityEncoding;
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unsigned LSDAEncoding;
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unsigned FDEEncoding;
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unsigned FDECFIEncoding;
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unsigned TTypeEncoding;
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/// TextSection - Section directive for standard text.
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///
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const MCSection *TextSection;
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/// DataSection - Section directive for standard data.
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///
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const MCSection *DataSection;
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/// BSSSection - Section that is default initialized to zero.
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const MCSection *BSSSection;
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/// ReadOnlySection - Section that is readonly and can contain arbitrary
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/// initialized data. Targets are not required to have a readonly section.
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/// If they don't, various bits of code will fall back to using the data
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/// section for constants.
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const MCSection *ReadOnlySection;
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/// StaticCtorSection - This section contains the static constructor pointer
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/// list.
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const MCSection *StaticCtorSection;
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/// StaticDtorSection - This section contains the static destructor pointer
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/// list.
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const MCSection *StaticDtorSection;
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/// LSDASection - If exception handling is supported by the target, this is
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/// the section the Language Specific Data Area information is emitted to.
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const MCSection *LSDASection;
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/// CompactUnwindSection - If exception handling is supported by the target
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/// and the target can support a compact representation of the CIE and FDE,
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/// this is the section to emit them into.
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const MCSection *CompactUnwindSection;
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/// DwarfAccelNamesSection, DwarfAccelObjCSection
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/// If we use the DWARF accelerated hash tables then we want toe emit these
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/// sections.
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const MCSection *DwarfAccelNamesSection;
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const MCSection *DwarfAccelObjCSection;
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const MCSection *DwarfAccelNamespaceSection;
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const MCSection *DwarfAccelTypesSection;
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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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const MCSection *DwarfAbbrevSection;
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const MCSection *DwarfInfoSection;
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const MCSection *DwarfLineSection;
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const MCSection *DwarfFrameSection;
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const MCSection *DwarfPubTypesSection;
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const MCSection *DwarfDebugInlineSection;
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const MCSection *DwarfStrSection;
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const MCSection *DwarfLocSection;
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const MCSection *DwarfARangesSection;
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const MCSection *DwarfRangesSection;
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const MCSection *DwarfMacroInfoSection;
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// Extra TLS Variable Data section. If the target needs to put additional
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// information for a TLS variable, it'll go here.
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const MCSection *TLSExtraDataSection;
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/// TLSDataSection - Section directive for Thread Local data.
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/// ELF and MachO only.
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const MCSection *TLSDataSection; // Defaults to ".tdata".
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/// TLSBSSSection - Section directive for Thread Local uninitialized data.
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/// Null if this target doesn't support a BSS section.
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/// ELF and MachO only.
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const MCSection *TLSBSSSection; // Defaults to ".tbss".
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/// EHFrameSection - EH frame section. It is initialized on demand so it
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/// can be overwritten (with uniquing).
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const MCSection *EHFrameSection;
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/// ELF specific sections.
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///
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const MCSection *DataRelSection;
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const MCSection *DataRelLocalSection;
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const MCSection *DataRelROSection;
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const MCSection *DataRelROLocalSection;
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const MCSection *MergeableConst4Section;
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const MCSection *MergeableConst8Section;
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const MCSection *MergeableConst16Section;
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/// MachO specific sections.
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///
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/// TLSTLVSection - Section for thread local structure information.
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/// Contains the source code name of the variable, visibility and a pointer
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/// to the initial value (.tdata or .tbss).
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const MCSection *TLSTLVSection; // Defaults to ".tlv".
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/// TLSThreadInitSection - Section for thread local data initialization
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/// functions.
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const MCSection *TLSThreadInitSection; // Defaults to ".thread_init_func".
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const MCSection *CStringSection;
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const MCSection *UStringSection;
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const MCSection *TextCoalSection;
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const MCSection *ConstTextCoalSection;
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const MCSection *ConstDataSection;
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const MCSection *DataCoalSection;
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const MCSection *DataCommonSection;
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const MCSection *DataBSSSection;
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const MCSection *FourByteConstantSection;
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const MCSection *EightByteConstantSection;
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const MCSection *SixteenByteConstantSection;
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const MCSection *LazySymbolPointerSection;
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const MCSection *NonLazySymbolPointerSection;
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/// COFF specific sections.
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///
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const MCSection *DrectveSection;
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const MCSection *PDataSection;
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const MCSection *XDataSection;
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/// StructorOutputOrder - Whether the static ctor/dtor list should be output
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/// in no particular order, in order of increasing priority or the reverse:
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/// in order of decreasing priority (the default).
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Structors::OutputOrder StructorOutputOrder; // Default is reverse order.
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public:
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void InitMCObjectFileInfo(StringRef TT, Reloc::Model RM, CodeModel::Model CM,
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MCContext &ctx);
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bool isFunctionEHFrameSymbolPrivate() const {
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return IsFunctionEHFrameSymbolPrivate;
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}
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bool getSupportsWeakOmittedEHFrame() const {
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return SupportsWeakOmittedEHFrame;
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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(bool CFI) const {
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return CFI ? FDECFIEncoding : FDEEncoding;
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}
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unsigned getTTypeEncoding() const { return TTypeEncoding; }
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const MCSection *getTextSection() const { return TextSection; }
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const MCSection *getDataSection() const { return DataSection; }
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const MCSection *getBSSSection() const { return BSSSection; }
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const MCSection *getStaticCtorSection() const { return StaticCtorSection; }
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const MCSection *getStaticDtorSection() const { return StaticDtorSection; }
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const MCSection *getLSDASection() const { return LSDASection; }
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const MCSection *getCompactUnwindSection() const{
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return CompactUnwindSection;
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}
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const MCSection *getDwarfAccelNamesSection() const {
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return DwarfAccelNamesSection;
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}
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const MCSection *getDwarfAccelObjCSection() const {
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return DwarfAccelObjCSection;
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}
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const MCSection *getDwarfAccelNamespaceSection() const {
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return DwarfAccelNamespaceSection;
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}
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const MCSection *getDwarfAccelTypesSection() const {
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return DwarfAccelTypesSection;
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}
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const MCSection *getDwarfAbbrevSection() const { return DwarfAbbrevSection; }
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const MCSection *getDwarfInfoSection() const { return DwarfInfoSection; }
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const MCSection *getDwarfLineSection() const { return DwarfLineSection; }
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const MCSection *getDwarfFrameSection() const { return DwarfFrameSection; }
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const MCSection *getDwarfPubTypesSection() const{return DwarfPubTypesSection;}
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const MCSection *getDwarfDebugInlineSection() const {
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return DwarfDebugInlineSection;
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}
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const MCSection *getDwarfStrSection() const { return DwarfStrSection; }
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const MCSection *getDwarfLocSection() const { return DwarfLocSection; }
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const MCSection *getDwarfARangesSection() const { return DwarfARangesSection;}
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const MCSection *getDwarfRangesSection() const { return DwarfRangesSection; }
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const MCSection *getDwarfMacroInfoSection() const {
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return DwarfMacroInfoSection;
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}
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const MCSection *getTLSExtraDataSection() const {
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return TLSExtraDataSection;
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}
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const MCSection *getTLSDataSection() const { return TLSDataSection; }
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const MCSection *getTLSBSSSection() const { return TLSBSSSection; }
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/// ELF specific sections.
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///
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const MCSection *getDataRelSection() const { return DataRelSection; }
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const MCSection *getDataRelLocalSection() const {
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return DataRelLocalSection;
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}
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const MCSection *getDataRelROSection() const { return DataRelROSection; }
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const MCSection *getDataRelROLocalSection() const {
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return DataRelROLocalSection;
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}
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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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/// MachO specific sections.
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///
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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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const 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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const 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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const MCSection *getLazySymbolPointerSection() const {
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return LazySymbolPointerSection;
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}
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const MCSection *getNonLazySymbolPointerSection() const {
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return NonLazySymbolPointerSection;
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}
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/// COFF specific sections.
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///
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const MCSection *getDrectveSection() const { return DrectveSection; }
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const MCSection *getPDataSection() const { return PDataSection; }
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const MCSection *getXDataSection() const { return XDataSection; }
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const MCSection *getEHFrameSection() {
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if (!EHFrameSection)
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InitEHFrameSection();
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return EHFrameSection;
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}
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Structors::OutputOrder getStructorOutputOrder() const {
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return StructorOutputOrder;
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}
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private:
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enum Environment { IsMachO, IsELF, IsCOFF };
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Environment Env;
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Reloc::Model RelocM;
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CodeModel::Model CMModel;
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MCContext *Ctx;
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void InitMachOMCObjectFileInfo(Triple T);
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void InitELFMCObjectFileInfo(Triple T);
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void InitCOFFMCObjectFileInfo(Triple T);
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/// InitEHFrameSection - Initialize EHFrameSection on demand.
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///
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void InitEHFrameSection();
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};
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} // end namespace llvm
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#endif
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