forked from OSchip/llvm-project
75 lines
1.8 KiB
C++
75 lines
1.8 KiB
C++
//===- 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 target symbol or subsection gives
|
|
// the destination that this relocation refers to.
|
|
uint64_t addend;
|
|
llvm::PointerUnion<Symbol *, InputSection *> target;
|
|
};
|
|
|
|
inline bool isZeroFill(uint8_t flags) {
|
|
return (flags & llvm::MachO::SECTION_TYPE) == llvm::MachO::S_ZEROFILL;
|
|
}
|
|
|
|
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
|
|
} // namespace lld
|
|
|
|
#endif
|