449 lines
17 KiB
C
449 lines
17 KiB
C
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//===-- llvm/MC/MCObjectFileInfo.h - Object File Info -----------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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/DenseMap.h"
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#include "llvm/ADT/Triple.h"
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#include "llvm/MC/MCSymbol.h"
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#include "llvm/Support/CodeGen.h"
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#include "llvm/Support/VersionTuple.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 = false;
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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 = false;
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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 = false;
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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 = false;
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/// FDE CFI encoding. Controls the encoding of the begin label in the
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/// .eh_frame section. Unlike the LSDA encoding, personality encoding, and
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/// type encodings, this is something that the assembler just "knows" about
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/// its target
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unsigned FDECFIEncoding = 0;
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/// Compact unwind encoding indicating that we should emit only an EH frame.
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unsigned CompactUnwindDwarfEHFrameOnly = 0;
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/// Section directive for standard text.
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MCSection *TextSection = nullptr;
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/// Section directive for standard data.
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MCSection *DataSection = nullptr;
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/// Section that is default initialized to zero.
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MCSection *BSSSection = nullptr;
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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 = nullptr;
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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 = nullptr;
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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 = nullptr;
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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 = nullptr;
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MCSection *DwarfInfoSection = nullptr;
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MCSection *DwarfLineSection = nullptr;
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MCSection *DwarfLineStrSection = nullptr;
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MCSection *DwarfFrameSection = nullptr;
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MCSection *DwarfPubTypesSection = nullptr;
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const MCSection *DwarfDebugInlineSection = nullptr;
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MCSection *DwarfStrSection = nullptr;
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MCSection *DwarfLocSection = nullptr;
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MCSection *DwarfARangesSection = nullptr;
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MCSection *DwarfRangesSection = nullptr;
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MCSection *DwarfMacinfoSection = nullptr;
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MCSection *DwarfMacroSection = nullptr;
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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 = nullptr;
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/// Accelerator table sections. DwarfDebugNamesSection is the DWARF v5
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/// accelerator table, while DwarfAccelNamesSection, DwarfAccelObjCSection,
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/// DwarfAccelNamespaceSection, DwarfAccelTypesSection are pre-DWARF v5
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/// extensions.
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MCSection *DwarfDebugNamesSection = nullptr;
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MCSection *DwarfAccelNamesSection = nullptr;
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MCSection *DwarfAccelObjCSection = nullptr;
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MCSection *DwarfAccelNamespaceSection = nullptr;
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MCSection *DwarfAccelTypesSection = nullptr;
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// These are used for the Fission separate debug information files.
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MCSection *DwarfInfoDWOSection = nullptr;
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MCSection *DwarfTypesDWOSection = nullptr;
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MCSection *DwarfAbbrevDWOSection = nullptr;
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MCSection *DwarfStrDWOSection = nullptr;
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MCSection *DwarfLineDWOSection = nullptr;
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MCSection *DwarfLocDWOSection = nullptr;
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MCSection *DwarfStrOffDWOSection = nullptr;
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MCSection *DwarfMacinfoDWOSection = nullptr;
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MCSection *DwarfMacroDWOSection = nullptr;
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/// The DWARF v5 string offset and address table sections.
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MCSection *DwarfStrOffSection = nullptr;
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MCSection *DwarfAddrSection = nullptr;
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/// The DWARF v5 range list section.
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MCSection *DwarfRnglistsSection = nullptr;
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/// The DWARF v5 locations list section.
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MCSection *DwarfLoclistsSection = nullptr;
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/// The DWARF v5 range and location list sections for fission.
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MCSection *DwarfRnglistsDWOSection = nullptr;
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MCSection *DwarfLoclistsDWOSection = nullptr;
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// These are for Fission DWP files.
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MCSection *DwarfCUIndexSection = nullptr;
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MCSection *DwarfTUIndexSection = nullptr;
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/// Section for newer gnu pubnames.
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MCSection *DwarfGnuPubNamesSection = nullptr;
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/// Section for newer gnu pubtypes.
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MCSection *DwarfGnuPubTypesSection = nullptr;
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// Section for Swift AST
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MCSection *DwarfSwiftASTSection = nullptr;
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MCSection *COFFDebugSymbolsSection = nullptr;
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MCSection *COFFDebugTypesSection = nullptr;
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MCSection *COFFGlobalTypeHashesSection = nullptr;
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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 = nullptr;
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/// Section directive for Thread Local data. ELF, MachO, COFF, and Wasm.
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MCSection *TLSDataSection = nullptr; // 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 = nullptr; // Defaults to ".tbss".
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/// StackMap section.
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MCSection *StackMapSection = nullptr;
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/// FaultMap section.
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MCSection *FaultMapSection = nullptr;
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/// Remarks section.
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MCSection *RemarksSection = nullptr;
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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 = nullptr;
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/// Section containing metadata on function stack sizes.
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MCSection *StackSizesSection = nullptr;
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/// Section for pseudo probe information used by AutoFDO
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MCSection *PseudoProbeSection = nullptr;
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MCSection *PseudoProbeDescSection = nullptr;
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// ELF specific sections.
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MCSection *DataRelROSection = nullptr;
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MCSection *MergeableConst4Section = nullptr;
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MCSection *MergeableConst8Section = nullptr;
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MCSection *MergeableConst16Section = nullptr;
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MCSection *MergeableConst32Section = nullptr;
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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 = nullptr; // Defaults to ".tlv".
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/// Section for thread local data initialization functions.
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// Defaults to ".thread_init_func".
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const MCSection *TLSThreadInitSection = nullptr;
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MCSection *CStringSection = nullptr;
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MCSection *UStringSection = nullptr;
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MCSection *TextCoalSection = nullptr;
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MCSection *ConstTextCoalSection = nullptr;
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MCSection *ConstDataSection = nullptr;
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MCSection *DataCoalSection = nullptr;
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MCSection *ConstDataCoalSection = nullptr;
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MCSection *DataCommonSection = nullptr;
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MCSection *DataBSSSection = nullptr;
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MCSection *FourByteConstantSection = nullptr;
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MCSection *EightByteConstantSection = nullptr;
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MCSection *SixteenByteConstantSection = nullptr;
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MCSection *LazySymbolPointerSection = nullptr;
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MCSection *NonLazySymbolPointerSection = nullptr;
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MCSection *ThreadLocalPointerSection = nullptr;
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/// COFF specific sections.
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MCSection *DrectveSection = nullptr;
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MCSection *PDataSection = nullptr;
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MCSection *XDataSection = nullptr;
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MCSection *SXDataSection = nullptr;
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MCSection *GFIDsSection = nullptr;
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MCSection *GIATsSection = nullptr;
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MCSection *GLJMPSection = nullptr;
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// XCOFF specific sections
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MCSection *TOCBaseSection = nullptr;
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public:
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void InitMCObjectFileInfo(const Triple &TT, bool PIC, MCContext &ctx,
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bool LargeCodeModel = false);
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MCContext &getContext() const { return *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 getFDEEncoding() const { return FDECFIEncoding; }
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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 *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 *getDwarfInfoSection(uint64_t Hash) const {
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return getDwarfComdatSection(".debug_info", Hash);
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}
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MCSection *getDwarfLineSection() const { return DwarfLineSection; }
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MCSection *getDwarfLineStrSection() const { return DwarfLineStrSection; }
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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 *getDwarfRnglistsSection() const { return DwarfRnglistsSection; }
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MCSection *getDwarfLoclistsSection() const { return DwarfLoclistsSection; }
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MCSection *getDwarfMacinfoSection() const { return DwarfMacinfoSection; }
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MCSection *getDwarfMacroSection() const { return DwarfMacroSection; }
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MCSection *getDwarfDebugNamesSection() const {
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return DwarfDebugNamesSection;
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}
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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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return getDwarfComdatSection(".debug_types", Hash);
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}
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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 *getDwarfStrOffSection() const { return DwarfStrOffSection; }
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MCSection *getDwarfAddrSection() const { return DwarfAddrSection; }
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MCSection *getDwarfRnglistsDWOSection() const {
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return DwarfRnglistsDWOSection;
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}
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MCSection *getDwarfLoclistsDWOSection() const {
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return DwarfLoclistsDWOSection;
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}
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MCSection *getDwarfMacroDWOSection() const { return DwarfMacroDWOSection; }
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MCSection *getDwarfMacinfoDWOSection() const {
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return DwarfMacinfoDWOSection;
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}
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MCSection *getDwarfCUIndexSection() const { return DwarfCUIndexSection; }
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MCSection *getDwarfTUIndexSection() const { return DwarfTUIndexSection; }
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MCSection *getDwarfSwiftASTSection() const { return DwarfSwiftASTSection; }
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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 *getCOFFGlobalTypeHashesSection() const {
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return COFFGlobalTypeHashesSection;
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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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MCSection *getRemarksSection() const { return RemarksSection; }
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MCSection *getStackSizesSection(const MCSection &TextSec) const;
|
||
|
|
|
||
|
|
MCSection *getBBAddrMapSection(const MCSection &TextSec) const;
|
||
|
|
|
||
|
|
MCSection *getPseudoProbeSection(const MCSection *TextSec) const;
|
||
|
|
|
||
|
|
MCSection *getPseudoProbeDescSection(StringRef FuncName) const;
|
||
|
|
|
||
|
|
// ELF specific sections.
|
||
|
|
MCSection *getDataRelROSection() const { return DataRelROSection; }
|
||
|
|
const MCSection *getMergeableConst4Section() const {
|
||
|
|
return MergeableConst4Section;
|
||
|
|
}
|
||
|
|
const MCSection *getMergeableConst8Section() const {
|
||
|
|
return MergeableConst8Section;
|
||
|
|
}
|
||
|
|
const MCSection *getMergeableConst16Section() const {
|
||
|
|
return MergeableConst16Section;
|
||
|
|
}
|
||
|
|
const MCSection *getMergeableConst32Section() const {
|
||
|
|
return MergeableConst32Section;
|
||
|
|
}
|
||
|
|
|
||
|
|
// 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; }
|
||
|
|
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 *getConstDataCoalSection() const {
|
||
|
|
return ConstDataCoalSection;
|
||
|
|
}
|
||
|
|
const MCSection *getDataCommonSection() const { return DataCommonSection; }
|
||
|
|
MCSection *getDataBSSSection() const { return DataBSSSection; }
|
||
|
|
const MCSection *getFourByteConstantSection() const {
|
||
|
|
return FourByteConstantSection;
|
||
|
|
}
|
||
|
|
const MCSection *getEightByteConstantSection() const {
|
||
|
|
return EightByteConstantSection;
|
||
|
|
}
|
||
|
|
const MCSection *getSixteenByteConstantSection() const {
|
||
|
|
return SixteenByteConstantSection;
|
||
|
|
}
|
||
|
|
MCSection *getLazySymbolPointerSection() const {
|
||
|
|
return LazySymbolPointerSection;
|
||
|
|
}
|
||
|
|
MCSection *getNonLazySymbolPointerSection() const {
|
||
|
|
return NonLazySymbolPointerSection;
|
||
|
|
}
|
||
|
|
MCSection *getThreadLocalPointerSection() const {
|
||
|
|
return ThreadLocalPointerSection;
|
||
|
|
}
|
||
|
|
|
||
|
|
// COFF specific sections.
|
||
|
|
MCSection *getDrectveSection() const { return DrectveSection; }
|
||
|
|
MCSection *getPDataSection() const { return PDataSection; }
|
||
|
|
MCSection *getXDataSection() const { return XDataSection; }
|
||
|
|
MCSection *getSXDataSection() const { return SXDataSection; }
|
||
|
|
MCSection *getGFIDsSection() const { return GFIDsSection; }
|
||
|
|
MCSection *getGIATsSection() const { return GIATsSection; }
|
||
|
|
MCSection *getGLJMPSection() const { return GLJMPSection; }
|
||
|
|
|
||
|
|
// XCOFF specific sections
|
||
|
|
MCSection *getTOCBaseSection() const { return TOCBaseSection; }
|
||
|
|
|
||
|
|
MCSection *getEHFrameSection() const { return EHFrameSection; }
|
||
|
|
|
||
|
|
enum Environment { IsMachO, IsELF, IsCOFF, IsWasm, IsXCOFF };
|
||
|
|
Environment getObjectFileType() const { return Env; }
|
||
|
|
|
||
|
|
bool isPositionIndependent() const { return PositionIndependent; }
|
||
|
|
|
||
|
|
private:
|
||
|
|
Environment Env;
|
||
|
|
bool PositionIndependent = false;
|
||
|
|
MCContext *Ctx = nullptr;
|
||
|
|
Triple TT;
|
||
|
|
VersionTuple SDKVersion;
|
||
|
|
|
||
|
|
void initMachOMCObjectFileInfo(const Triple &T);
|
||
|
|
void initELFMCObjectFileInfo(const Triple &T, bool Large);
|
||
|
|
void initCOFFMCObjectFileInfo(const Triple &T);
|
||
|
|
void initWasmMCObjectFileInfo(const Triple &T);
|
||
|
|
void initXCOFFMCObjectFileInfo(const Triple &T);
|
||
|
|
MCSection *getDwarfComdatSection(const char *Name, uint64_t Hash) const;
|
||
|
|
|
||
|
|
public:
|
||
|
|
const Triple &getTargetTriple() const { return TT; }
|
||
|
|
|
||
|
|
void setSDKVersion(const VersionTuple &TheSDKVersion) {
|
||
|
|
SDKVersion = TheSDKVersion;
|
||
|
|
}
|
||
|
|
|
||
|
|
const VersionTuple &getSDKVersion() const { return SDKVersion; }
|
||
|
|
};
|
||
|
|
|
||
|
|
} // end namespace llvm
|
||
|
|
|
||
|
|
#endif
|