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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
92 lines
3.4 KiB
C++
92 lines
3.4 KiB
C++
//===- MCSectionMachO.h - MachO Machine Code Sections -----------*- 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 declares the MCSectionMachO class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_MC_MCSECTIONMACHO_H
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#define LLVM_MC_MCSECTIONMACHO_H
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#include "llvm/ADT/StringRef.h"
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#include "llvm/BinaryFormat/MachO.h"
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#include "llvm/MC/MCSection.h"
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namespace llvm {
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/// This represents a section on a Mach-O system (used by Mac OS X). On a Mac
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/// system, these are also described in /usr/include/mach-o/loader.h.
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class MCSectionMachO final : public MCSection {
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char SegmentName[16]; // Not necessarily null terminated!
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char SectionName[16]; // Not necessarily null terminated!
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/// This is the SECTION_TYPE and SECTION_ATTRIBUTES field of a section, drawn
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/// from the enums below.
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unsigned TypeAndAttributes;
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/// The 'reserved2' field of a section, used to represent the size of stubs,
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/// for example.
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unsigned Reserved2;
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MCSectionMachO(StringRef Segment, StringRef Section, unsigned TAA,
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unsigned reserved2, SectionKind K, MCSymbol *Begin);
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friend class MCContext;
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public:
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StringRef getSegmentName() const {
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// SegmentName is not necessarily null terminated!
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if (SegmentName[15])
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return StringRef(SegmentName, 16);
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return StringRef(SegmentName);
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}
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StringRef getSectionName() const {
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// SectionName is not necessarily null terminated!
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if (SectionName[15])
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return StringRef(SectionName, 16);
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return StringRef(SectionName);
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}
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unsigned getTypeAndAttributes() const { return TypeAndAttributes; }
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unsigned getStubSize() const { return Reserved2; }
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MachO::SectionType getType() const {
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return static_cast<MachO::SectionType>(TypeAndAttributes &
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MachO::SECTION_TYPE);
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}
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bool hasAttribute(unsigned Value) const {
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return (TypeAndAttributes & Value) != 0;
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}
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/// Parse the section specifier indicated by "Spec". This is a string that can
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/// appear after a .section directive in a mach-o flavored .s file. If
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/// successful, this fills in the specified Out parameters and returns an
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/// empty string. When an invalid section specifier is present, this returns
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/// a string indicating the problem. If no TAA was parsed, TAA is not altered,
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/// and TAAWasSet becomes false.
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static std::string ParseSectionSpecifier(StringRef Spec, // In.
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StringRef &Segment, // Out.
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StringRef &Section, // Out.
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unsigned &TAA, // Out.
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bool &TAAParsed, // Out.
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unsigned &StubSize); // Out.
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void PrintSwitchToSection(const MCAsmInfo &MAI, const Triple &T,
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raw_ostream &OS,
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const MCExpr *Subsection) const override;
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bool UseCodeAlign() const override;
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bool isVirtualSection() const override;
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static bool classof(const MCSection *S) {
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return S->getVariant() == SV_MachO;
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}
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};
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} // end namespace llvm
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#endif
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