InputSection.h
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//===- InputSection.h -------------------------------------------*- 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 LLD_MACHO_INPUT_SECTION_H
#define LLD_MACHO_INPUT_SECTION_H
#include "lld/Common/LLVM.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/PointerUnion.h"
#include "llvm/BinaryFormat/MachO.h"
namespace lld {
namespace macho {
class InputFile;
class InputSection;
class OutputSection;
class Symbol;
struct Reloc {
uint8_t type;
bool pcrel;
uint8_t length;
// The offset from the start of the subsection that this relocation belongs
// to.
uint32_t offset;
// Adding this offset to the address of the referent symbol or subsection
// gives the destination that this relocation refers to.
uint64_t addend;
llvm::PointerUnion<Symbol *, InputSection *> referent;
};
inline bool isZeroFill(uint8_t flags) {
return llvm::MachO::isVirtualSection(flags & llvm::MachO::SECTION_TYPE);
}
inline bool isThreadLocalVariables(uint8_t flags) {
return (flags & llvm::MachO::SECTION_TYPE) ==
llvm::MachO::S_THREAD_LOCAL_VARIABLES;
}
class InputSection {
public:
virtual ~InputSection() = default;
virtual uint64_t getSize() const { return data.size(); }
virtual uint64_t getFileSize() const {
return isZeroFill(flags) ? 0 : getSize();
}
uint64_t getFileOffset() const;
uint64_t getVA() const;
virtual void writeTo(uint8_t *buf);
InputFile *file = nullptr;
StringRef name;
StringRef segname;
OutputSection *parent = nullptr;
uint64_t outSecOff = 0;
uint64_t outSecFileOff = 0;
uint32_t align = 1;
uint32_t flags = 0;
ArrayRef<uint8_t> data;
std::vector<Reloc> relocs;
};
extern std::vector<InputSection *> inputSections;
} // namespace macho
std::string toString(const macho::InputSection *);
} // namespace lld
#endif