llvm/lib/ObjCopy/wasm/WasmReader.cpp

   1 //===- WasmReader.cpp -----------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "WasmReader.h"
  10
  11 namespace llvm {
  12 namespace objcopy {
  13 namespace wasm {
  14
  15 using namespace object;
  16 using namespace llvm::wasm;
  17
  18 Expected<std::unique_ptr<Object>> Reader::create() const {
  19   auto Obj = std::make_unique<Object>();
  20   Obj->Header = WasmObj.getHeader();
  21   std::vector<Section> Sections;
  22   Obj->Sections.reserve(WasmObj.getNumSections());
  23   for (const SectionRef &Sec : WasmObj.sections()) {
  24     const WasmSection &WS = WasmObj.getWasmSection(Sec);
  25     Obj->Sections.push_back({static_cast<uint8_t>(WS.Type),
  26                              WS.HeaderSecSizeEncodingLen, WS.Name, WS.Content});
  27     // Give known sections standard names to allow them to be selected. (Custom
  28     // sections already have their names filled in by the parser).
  29     Section &ReaderSec = Obj->Sections.back();
  30     if (ReaderSec.SectionType > WASM_SEC_CUSTOM &&
  31         ReaderSec.SectionType <= WASM_SEC_LAST_KNOWN)
  32       ReaderSec.Name = sectionTypeToString(ReaderSec.SectionType);
  33   }
  34   return std::move(Obj);
  35 }
  36
  37 } // end namespace wasm
  38 } // end namespace objcopy
  39 } // end namespace llvm