1 files changed, 56 insertions, 0 deletions
diff --git a/lld/MachO/MergedOutputSection.h b/lld/MachO/MergedOutputSection.h
new file mode 100644
index 000000000000..279a7e0f75cd
--- /dev/null
+++ b/lld/MachO/MergedOutputSection.h
@@ -0,0 +1,56 @@
+//===- 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