[llvm-objcopy][WebAssembly] Add dump/add/remove-section support

Add support for adding, removing, and dumping wasm sections to objcopy

Differential Revision: https://reviews.llvm.org/D70970

1 files changed, 36 insertions, 0 deletions

diff --git a/llvm/tools/llvm-objcopy/wasm/Object.cpp b/llvm/tools/llvm-objcopy/wasm/Object.cpp
new file mode 100644
index 0000000..0c41648
--- /dev/null
+++ b/llvm/tools/llvm-objcopy/wasm/Object.cpp
@@ -0,0 +1,36 @@
+//===- Object.cpp ---------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "Object.h"
+
+#include "llvm/Support/LEB128.h"
+#include "llvm/Support/raw_ostream.h"
+
+namespace llvm {
+namespace objcopy {
+namespace wasm {
+
+using namespace object;
+using namespace llvm::wasm;
+
+void Object::addSectionWithOwnedContents(
+    Section NewSection, std::unique_ptr<MemoryBuffer> &&Content) {
+  Sections.push_back(NewSection);
+  OwnedContents.emplace_back(std::move(Content));
+}
+
+void Object::removeSections(function_ref<bool(const Section &)> ToRemove) {
+  // TODO: remove reloc sections for the removed section, handle symbols, etc.
+  Sections.erase(
+      std::remove_if(std::begin(Sections), std::end(Sections), ToRemove),
+      std::end(Sections));
+}
+
+} // end namespace wasm
+} // end namespace objcopy
+} // end namespace llvm