xref: /freebsd-src/contrib/llvm-project/llvm/tools/llvm-objdump/WasmDump.cpp (revision 5f757f3ff9144b609b3c433dfd370cc6bdc191ad)
10b57cec5SDimitry Andric //===-- WasmDump.cpp - wasm-specific dumper ---------------------*- C++ -*-===//
20b57cec5SDimitry Andric //
30b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
40b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information.
50b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
60b57cec5SDimitry Andric //
70b57cec5SDimitry Andric //===----------------------------------------------------------------------===//
80b57cec5SDimitry Andric ///
90b57cec5SDimitry Andric /// \file
100b57cec5SDimitry Andric /// This file implements the wasm-specific dumper for llvm-objdump.
110b57cec5SDimitry Andric ///
120b57cec5SDimitry Andric //===----------------------------------------------------------------------===//
130b57cec5SDimitry Andric 
145ffd83dbSDimitry Andric #include "WasmDump.h"
155ffd83dbSDimitry Andric 
160b57cec5SDimitry Andric #include "llvm-objdump.h"
170b57cec5SDimitry Andric #include "llvm/Object/Wasm.h"
180b57cec5SDimitry Andric 
195ffd83dbSDimitry Andric using namespace llvm;
200b57cec5SDimitry Andric using namespace llvm::object;
210b57cec5SDimitry Andric 
2206c3fb27SDimitry Andric namespace {
2306c3fb27SDimitry Andric class WasmDumper : public objdump::Dumper {
2406c3fb27SDimitry Andric   const WasmObjectFile &Obj;
250b57cec5SDimitry Andric 
2606c3fb27SDimitry Andric public:
WasmDumper(const WasmObjectFile & O)2706c3fb27SDimitry Andric   WasmDumper(const WasmObjectFile &O) : Dumper(O), Obj(O) {}
28*5f757f3fSDimitry Andric   void printPrivateHeaders() override;
2906c3fb27SDimitry Andric };
3006c3fb27SDimitry Andric } // namespace
3106c3fb27SDimitry Andric 
3206c3fb27SDimitry Andric std::unique_ptr<objdump::Dumper>
createWasmDumper(const object::WasmObjectFile & Obj)3306c3fb27SDimitry Andric objdump::createWasmDumper(const object::WasmObjectFile &Obj) {
3406c3fb27SDimitry Andric   return std::make_unique<WasmDumper>(Obj);
3506c3fb27SDimitry Andric }
3606c3fb27SDimitry Andric 
printPrivateHeaders()37*5f757f3fSDimitry Andric void WasmDumper::printPrivateHeaders() {
380b57cec5SDimitry Andric   outs() << "Program Header:\n";
390b57cec5SDimitry Andric   outs() << "Version: 0x";
4006c3fb27SDimitry Andric   outs().write_hex(Obj.getHeader().Version);
410b57cec5SDimitry Andric   outs() << "\n";
420b57cec5SDimitry Andric }
430b57cec5SDimitry Andric 
getWasmRelocationValueString(const WasmObjectFile * Obj,const RelocationRef & RelRef,SmallVectorImpl<char> & Result)445ffd83dbSDimitry Andric Error objdump::getWasmRelocationValueString(const WasmObjectFile *Obj,
450b57cec5SDimitry Andric                                             const RelocationRef &RelRef,
460b57cec5SDimitry Andric                                             SmallVectorImpl<char> &Result) {
470b57cec5SDimitry Andric   const wasm::WasmRelocation &Rel = Obj->getWasmRelocation(RelRef);
480b57cec5SDimitry Andric   symbol_iterator SI = RelRef.getSymbol();
490b57cec5SDimitry Andric   std::string FmtBuf;
500b57cec5SDimitry Andric   raw_string_ostream Fmt(FmtBuf);
510b57cec5SDimitry Andric   if (SI == Obj->symbol_end()) {
520b57cec5SDimitry Andric     // Not all wasm relocations have symbols associated with them.
530b57cec5SDimitry Andric     // In particular R_WASM_TYPE_INDEX_LEB.
540b57cec5SDimitry Andric     Fmt << Rel.Index;
550b57cec5SDimitry Andric   } else {
560b57cec5SDimitry Andric     Expected<StringRef> SymNameOrErr = SI->getName();
570b57cec5SDimitry Andric     if (!SymNameOrErr)
580b57cec5SDimitry Andric       return SymNameOrErr.takeError();
590b57cec5SDimitry Andric     StringRef SymName = *SymNameOrErr;
600b57cec5SDimitry Andric     Result.append(SymName.begin(), SymName.end());
610b57cec5SDimitry Andric   }
620b57cec5SDimitry Andric   Fmt << (Rel.Addend < 0 ? "" : "+") << Rel.Addend;
630b57cec5SDimitry Andric   Fmt.flush();
640b57cec5SDimitry Andric   Result.append(FmtBuf.begin(), FmtBuf.end());
650b57cec5SDimitry Andric   return Error::success();
660b57cec5SDimitry Andric }
67