ELFAttributes.h

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//===-- ELFAttributes.h - ELF Attributes ------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
 
#ifndef LLVM_SUPPORT_ELFATTRIBUTES_H
#define LLVM_SUPPORT_ELFATTRIBUTES_H
 
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/Compiler.h"
#include <optional>
 
namespace llvm {
 
// Tag to string: ELF compact build attribute section
struct TagNameItem {
  unsigned attr;
  StringRef tagName;
};
 
using TagNameMap = ArrayRef<TagNameItem>;
 
// Build Attribute storage for ELF extended attribute section
struct BuildAttributeItem {
  enum Types : uint8_t {
    NumericAttribute = 0,
    TextAttribute,
  } Type;
  unsigned Tag;
  unsigned IntValue;
  std::string StringValue;
  BuildAttributeItem(Types Ty, unsigned Tg, unsigned IV, std::string SV)
      : Type(Ty), Tag(Tg), IntValue(IV), StringValue(std::move(SV)) {}
};
struct BuildAttributeSubSection {
  std::string Name;
  unsigned IsOptional;
  unsigned ParameterType;
  SmallVector<BuildAttributeItem, 64> Content;
};
 
// Tag to string: ELF extended build attribute section
struct SubsectionAndTagToTagName {
  StringRef SubsectionName;
  unsigned Tag;
  StringRef TagName;
  SubsectionAndTagToTagName(StringRef SN, unsigned Tg, StringRef TN)
      : SubsectionName(SN), Tag(Tg), TagName(TN) {}
};
 
namespace ELFAttrs {
 
enum AttrType : unsigned { File = 1, Section = 2, Symbol = 3 };
 
LLVM_ABI StringRef attrTypeAsString(unsigned attr, TagNameMap tagNameMap,
                                    bool hasTagPrefix = true);
LLVM_ABI std::optional<unsigned> attrTypeFromString(StringRef tag,
                                                    TagNameMap tagNameMap);
 
// Magic numbers for ELF attributes.
enum AttrMagic { Format_Version = 0x41 };
 
} // namespace ELFAttrs
} // namespace llvm
#endif