llvm-6502/include/llvm/MC/MCObjectFileInfo.h
Anton Korobeynikov 0cb2a45cce Emit the ctors in the proper order on ARM/EABI.
Maybe some targets should use this as well.

Patch by Evgeniy Stepanov!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145781 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-03 23:49:37 +00:00

326 lines
12 KiB
C++

//===-- llvm/MC/MCObjectFileInfo.h - Object File Info -----------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file describes common object file formats.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_MC_MCBJECTFILEINFO_H
#define LLVM_MC_MCBJECTFILEINFO_H
#include "llvm/MC/MCCodeGenInfo.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/MC/SectionKind.h"
namespace llvm {
class MCContext;
class MCSection;
class Triple;
namespace Structors {
enum OutputOrder { None, PriorityOrder, ReversePriorityOrder };
}
class MCObjectFileInfo {
protected:
/// CommDirectiveSupportsAlignment - True if .comm supports alignment. This
/// is a hack for as long as we support 10.4 Tiger, whose assembler doesn't
/// support alignment on comm.
bool CommDirectiveSupportsAlignment;
/// SupportsWeakEmptyEHFrame - True if target object file supports a
/// weak_definition of constant 0 for an omitted EH frame.
bool SupportsWeakOmittedEHFrame;
/// IsFunctionEHFrameSymbolPrivate - This flag is set to true if the
/// "EH_frame" symbol for EH information should be an assembler temporary (aka
/// private linkage, aka an L or .L label) or false if it should be a normal
/// non-.globl label. This defaults to true.
bool IsFunctionEHFrameSymbolPrivate;
/// PersonalityEncoding, LSDAEncoding, FDEEncoding, TTypeEncoding - Some
/// encoding values for EH.
unsigned PersonalityEncoding;
unsigned LSDAEncoding;
unsigned FDEEncoding;
unsigned FDECFIEncoding;
unsigned TTypeEncoding;
/// TextSection - Section directive for standard text.
///
const MCSection *TextSection;
/// DataSection - Section directive for standard data.
///
const MCSection *DataSection;
/// BSSSection - Section that is default initialized to zero.
const MCSection *BSSSection;
/// ReadOnlySection - Section that is readonly and can contain arbitrary
/// initialized data. Targets are not required to have a readonly section.
/// If they don't, various bits of code will fall back to using the data
/// section for constants.
const MCSection *ReadOnlySection;
/// StaticCtorSection - This section contains the static constructor pointer
/// list.
const MCSection *StaticCtorSection;
/// StaticDtorSection - This section contains the static destructor pointer
/// list.
const MCSection *StaticDtorSection;
/// LSDASection - If exception handling is supported by the target, this is
/// the section the Language Specific Data Area information is emitted to.
const MCSection *LSDASection;
/// CompactUnwindSection - If exception handling is supported by the target
/// and the target can support a compact representation of the CIE and FDE,
/// this is the section to emit them into.
const MCSection *CompactUnwindSection;
/// DwarfAccelNamesSection, DwarfAccelObjCSection
/// If we use the DWARF accelerated hash tables then we want toe emit these
/// sections.
const MCSection *DwarfAccelNamesSection;
const MCSection *DwarfAccelObjCSection;
const MCSection *DwarfAccelNamespaceSection;
const MCSection *DwarfAccelTypesSection;
// Dwarf sections for debug info. If a target supports debug info, these must
// be set.
const MCSection *DwarfAbbrevSection;
const MCSection *DwarfInfoSection;
const MCSection *DwarfLineSection;
const MCSection *DwarfFrameSection;
const MCSection *DwarfPubTypesSection;
const MCSection *DwarfDebugInlineSection;
const MCSection *DwarfStrSection;
const MCSection *DwarfLocSection;
const MCSection *DwarfARangesSection;
const MCSection *DwarfRangesSection;
const MCSection *DwarfMacroInfoSection;
// Extra TLS Variable Data section. If the target needs to put additional
// information for a TLS variable, it'll go here.
const MCSection *TLSExtraDataSection;
/// TLSDataSection - Section directive for Thread Local data.
/// ELF and MachO only.
const MCSection *TLSDataSection; // Defaults to ".tdata".
/// TLSBSSSection - Section directive for Thread Local uninitialized data.
/// Null if this target doesn't support a BSS section.
/// ELF and MachO only.
const MCSection *TLSBSSSection; // Defaults to ".tbss".
/// EHFrameSection - EH frame section. It is initialized on demand so it
/// can be overwritten (with uniquing).
const MCSection *EHFrameSection;
/// ELF specific sections.
///
const MCSection *DataRelSection;
const MCSection *DataRelLocalSection;
const MCSection *DataRelROSection;
const MCSection *DataRelROLocalSection;
const MCSection *MergeableConst4Section;
const MCSection *MergeableConst8Section;
const MCSection *MergeableConst16Section;
/// MachO specific sections.
///
/// TLSTLVSection - Section for thread local structure information.
/// Contains the source code name of the variable, visibility and a pointer
/// to the initial value (.tdata or .tbss).
const MCSection *TLSTLVSection; // Defaults to ".tlv".
/// TLSThreadInitSection - Section for thread local data initialization
/// functions.
const MCSection *TLSThreadInitSection; // Defaults to ".thread_init_func".
const MCSection *CStringSection;
const MCSection *UStringSection;
const MCSection *TextCoalSection;
const MCSection *ConstTextCoalSection;
const MCSection *ConstDataSection;
const MCSection *DataCoalSection;
const MCSection *DataCommonSection;
const MCSection *DataBSSSection;
const MCSection *FourByteConstantSection;
const MCSection *EightByteConstantSection;
const MCSection *SixteenByteConstantSection;
const MCSection *LazySymbolPointerSection;
const MCSection *NonLazySymbolPointerSection;
/// COFF specific sections.
///
const MCSection *DrectveSection;
const MCSection *PDataSection;
const MCSection *XDataSection;
/// StructorOutputOrder - Whether the static ctor/dtor list should be output
/// in no particular order, in order of increasing priority or the reverse:
/// in order of decreasing priority (the default).
Structors::OutputOrder StructorOutputOrder; // Default is reverse order.
public:
void InitMCObjectFileInfo(StringRef TT, Reloc::Model RM, CodeModel::Model CM,
MCContext &ctx);
bool isFunctionEHFrameSymbolPrivate() const {
return IsFunctionEHFrameSymbolPrivate;
}
bool getSupportsWeakOmittedEHFrame() const {
return SupportsWeakOmittedEHFrame;
}
bool getCommDirectiveSupportsAlignment() const {
return CommDirectiveSupportsAlignment;
}
unsigned getPersonalityEncoding() const { return PersonalityEncoding; }
unsigned getLSDAEncoding() const { return LSDAEncoding; }
unsigned getFDEEncoding(bool CFI) const {
return CFI ? FDECFIEncoding : FDEEncoding;
}
unsigned getTTypeEncoding() const { return TTypeEncoding; }
const MCSection *getTextSection() const { return TextSection; }
const MCSection *getDataSection() const { return DataSection; }
const MCSection *getBSSSection() const { return BSSSection; }
const MCSection *getStaticCtorSection() const { return StaticCtorSection; }
const MCSection *getStaticDtorSection() const { return StaticDtorSection; }
const MCSection *getLSDASection() const { return LSDASection; }
const MCSection *getCompactUnwindSection() const{
return CompactUnwindSection;
}
const MCSection *getDwarfAccelNamesSection() const {
return DwarfAccelNamesSection;
}
const MCSection *getDwarfAccelObjCSection() const {
return DwarfAccelObjCSection;
}
const MCSection *getDwarfAccelNamespaceSection() const {
return DwarfAccelNamespaceSection;
}
const MCSection *getDwarfAccelTypesSection() const {
return DwarfAccelTypesSection;
}
const MCSection *getDwarfAbbrevSection() const { return DwarfAbbrevSection; }
const MCSection *getDwarfInfoSection() const { return DwarfInfoSection; }
const MCSection *getDwarfLineSection() const { return DwarfLineSection; }
const MCSection *getDwarfFrameSection() const { return DwarfFrameSection; }
const MCSection *getDwarfPubTypesSection() const{return DwarfPubTypesSection;}
const MCSection *getDwarfDebugInlineSection() const {
return DwarfDebugInlineSection;
}
const MCSection *getDwarfStrSection() const { return DwarfStrSection; }
const MCSection *getDwarfLocSection() const { return DwarfLocSection; }
const MCSection *getDwarfARangesSection() const { return DwarfARangesSection;}
const MCSection *getDwarfRangesSection() const { return DwarfRangesSection; }
const MCSection *getDwarfMacroInfoSection() const {
return DwarfMacroInfoSection;
}
const MCSection *getTLSExtraDataSection() const {
return TLSExtraDataSection;
}
const MCSection *getTLSDataSection() const { return TLSDataSection; }
const MCSection *getTLSBSSSection() const { return TLSBSSSection; }
/// ELF specific sections.
///
const MCSection *getDataRelSection() const { return DataRelSection; }
const MCSection *getDataRelLocalSection() const {
return DataRelLocalSection;
}
const MCSection *getDataRelROSection() const { return DataRelROSection; }
const MCSection *getDataRelROLocalSection() const {
return DataRelROLocalSection;
}
const MCSection *getMergeableConst4Section() const {
return MergeableConst4Section;
}
const MCSection *getMergeableConst8Section() const {
return MergeableConst8Section;
}
const MCSection *getMergeableConst16Section() const {
return MergeableConst16Section;
}
/// MachO specific sections.
///
const MCSection *getTLSTLVSection() const { return TLSTLVSection; }
const MCSection *getTLSThreadInitSection() const {
return TLSThreadInitSection;
}
const MCSection *getCStringSection() const { return CStringSection; }
const MCSection *getUStringSection() const { return UStringSection; }
const MCSection *getTextCoalSection() const { return TextCoalSection; }
const MCSection *getConstTextCoalSection() const {
return ConstTextCoalSection;
}
const MCSection *getConstDataSection() const { return ConstDataSection; }
const MCSection *getDataCoalSection() const { return DataCoalSection; }
const MCSection *getDataCommonSection() const { return DataCommonSection; }
const MCSection *getDataBSSSection() const { return DataBSSSection; }
const MCSection *getFourByteConstantSection() const {
return FourByteConstantSection;
}
const MCSection *getEightByteConstantSection() const {
return EightByteConstantSection;
}
const MCSection *getSixteenByteConstantSection() const {
return SixteenByteConstantSection;
}
const MCSection *getLazySymbolPointerSection() const {
return LazySymbolPointerSection;
}
const MCSection *getNonLazySymbolPointerSection() const {
return NonLazySymbolPointerSection;
}
/// COFF specific sections.
///
const MCSection *getDrectveSection() const { return DrectveSection; }
const MCSection *getPDataSection() const { return PDataSection; }
const MCSection *getXDataSection() const { return XDataSection; }
const MCSection *getEHFrameSection() {
if (!EHFrameSection)
InitEHFrameSection();
return EHFrameSection;
}
Structors::OutputOrder getStructorOutputOrder() const {
return StructorOutputOrder;
}
private:
enum Environment { IsMachO, IsELF, IsCOFF };
Environment Env;
Reloc::Model RelocM;
CodeModel::Model CMModel;
MCContext *Ctx;
void InitMachOMCObjectFileInfo(Triple T);
void InitELFMCObjectFileInfo(Triple T);
void InitCOFFMCObjectFileInfo(Triple T);
/// InitEHFrameSection - Initialize EHFrameSection on demand.
///
void InitEHFrameSection();
};
} // end namespace llvm
#endif