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//===- OutputSection.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_MERGED_OUTPUT_SECTION_H
#define LLD_MACHO_MERGED_OUTPUT_SECTION_H
#include "InputSection.h"
#include "OutputSection.h"
#include "lld/Common/LLVM.h"
#include "llvm/ADT/MapVector.h"
namespace lld {
namespace macho {
// Linking multiple files will inevitably mean resolving sections in different
// files that are labeled with the same segment and section name. This class
// contains all such sections and writes the data from each section sequentially
// in the final binary.
class MergedOutputSection : public OutputSection {
public:
MergedOutputSection(StringRef name) : OutputSection(MergedKind, name) {}
const InputSection *firstSection() const { return inputs.front(); }
const InputSection *lastSection() const { return inputs.back(); }
// These accessors will only be valid after finalizing the section
uint64_t getSize() const override { return size; }
uint64_t getFileSize() const override { return fileSize; }
void mergeInput(InputSection *input);
void finalize() override;
void writeTo(uint8_t *buf) const override;
std::vector<InputSection *> inputs;
static bool classof(const OutputSection *sec) {
return sec->kind() == MergedKind;
}
private:
void mergeFlags(uint32_t inputFlags);
size_t size = 0;
uint64_t fileSize = 0;
};
} // namespace macho
} // namespace lld
#endif
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