vendor/llvm/llvm-trunk-r375505vendor/llvm

1 files changed, 50 insertions, 0 deletions

diff --git a/tools/llvm-objcopy/MachO/MachOLayoutBuilder.h b/tools/llvm-objcopy/MachO/MachOLayoutBuilder.h
new file mode 100644
index 000000000000..21cbe56605de
--- /dev/null
+++ b/tools/llvm-objcopy/MachO/MachOLayoutBuilder.h
@@ -0,0 +1,50 @@
+//===- MachOLayoutBuilder.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 LLVM_OBJCOPY_MACHO_MACHOLAYOUTBUILDER_H
+#define LLVM_OBJCOPY_MACHO_MACHOLAYOUTBUILDER_H
+
+#include "MachOObjcopy.h"
+#include "Object.h"
+
+namespace llvm {
+namespace objcopy {
+namespace macho {
+
+class MachOLayoutBuilder {
+  Object &O;
+  bool Is64Bit;
+  uint64_t PageSize;
+
+  // Points to the __LINKEDIT segment if it exists.
+  MachO::macho_load_command *LinkEditLoadCommand = nullptr;
+  StringTableBuilder StrTableBuilder{StringTableBuilder::MachO};
+
+  uint32_t computeSizeOfCmds() const;
+  void constructStringTable();
+  void updateSymbolIndexes();
+  void updateDySymTab(MachO::macho_load_command &MLC);
+  uint64_t layoutSegments();
+  uint64_t layoutRelocations(uint64_t Offset);
+  Error layoutTail(uint64_t Offset);
+
+public:
+  MachOLayoutBuilder(Object &O, bool Is64Bit, uint64_t PageSize)
+      : O(O), Is64Bit(Is64Bit), PageSize(PageSize) {}
+
+  // Recomputes and updates fields in the given object such as file offsets.
+  Error layout();
+
+  StringTableBuilder &getStringTableBuilder() { return StrTableBuilder; }
+};
+
+} // end namespace macho
+} // end namespace objcopy
+} // end namespace llvm
+
+#endif // LLVM_OBJCOPY_MACHO_MACHOLAYOUTBUILDER_H