| 1 | //===-- WasmDump.cpp - wasm-specific dumper ---------------------*- C++ -*-===// |
|---|---|
| 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 | /// \file |
| 10 | /// This file implements the wasm-specific dumper for llvm-objdump. |
| 11 | /// |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #include "WasmDump.h" |
| 15 | |
| 16 | #include "llvm-objdump.h" |
| 17 | #include "llvm/Object/Wasm.h" |
| 18 | |
| 19 | using namespace llvm; |
| 20 | using namespace llvm::object; |
| 21 | |
| 22 | namespace { |
| 23 | class WasmDumper : public objdump::Dumper { |
| 24 | const WasmObjectFile &Obj; |
| 25 | |
| 26 | public: |
| 27 | WasmDumper(const WasmObjectFile &O) : Dumper(O), Obj(O) {} |
| 28 | void printPrivateHeaders() override; |
| 29 | }; |
| 30 | } // namespace |
| 31 | |
| 32 | std::unique_ptr<objdump::Dumper> |
| 33 | objdump::createWasmDumper(const object::WasmObjectFile &Obj) { |
| 34 | return std::make_unique<WasmDumper>(args: Obj); |
| 35 | } |
| 36 | |
| 37 | void WasmDumper::printPrivateHeaders() { |
| 38 | outs() << "Program Header:\n"; |
| 39 | outs() << "Version: 0x"; |
| 40 | outs().write_hex(N: Obj.getHeader().Version); |
| 41 | outs() << "\n"; |
| 42 | } |
| 43 | |
| 44 | Error objdump::getWasmRelocationValueString(const WasmObjectFile *Obj, |
| 45 | const RelocationRef &RelRef, |
| 46 | SmallVectorImpl<char> &Result) { |
| 47 | const wasm::WasmRelocation &Rel = Obj->getWasmRelocation(Ref: RelRef); |
| 48 | symbol_iterator SI = RelRef.getSymbol(); |
| 49 | std::string FmtBuf; |
| 50 | raw_string_ostream Fmt(FmtBuf); |
| 51 | if (SI == Obj->symbol_end()) { |
| 52 | // Not all wasm relocations have symbols associated with them. |
| 53 | // In particular R_WASM_TYPE_INDEX_LEB. |
| 54 | Fmt << Rel.Index; |
| 55 | } else { |
| 56 | Expected<StringRef> SymNameOrErr = SI->getName(); |
| 57 | if (!SymNameOrErr) |
| 58 | return SymNameOrErr.takeError(); |
| 59 | StringRef SymName = *SymNameOrErr; |
| 60 | Result.append(in_start: SymName.begin(), in_end: SymName.end()); |
| 61 | } |
| 62 | Fmt << (Rel.Addend < 0 ? "": "+") << Rel.Addend; |
| 63 | Fmt.flush(); |
| 64 | Result.append(in_start: FmtBuf.begin(), in_end: FmtBuf.end()); |
| 65 | return Error::success(); |
| 66 | } |
| 67 |