2bdcfc7ab8
This pr adds the `extract-section` option to `llvm-objcopy` as a common option. It differs from `dump-section` as it will produce a standalone object with just one section, as opposed to just the section contents. For more context as to other options considered, see https://github.com/llvm/llvm-project/pull/153265#issuecomment-3195696003. This difference in behaviour is used for DXC compatibility with `extract-rootsignature` and `/Frs`. This pr then implements this functionality for `DXContainer` objects. This is the second step of https://github.com/llvm/llvm-project/issues/150277 to implement as a compiler action that invokes `llvm-objcopy` for functionality. This also completes the implementation of `extract-rootsignature` as described in https://github.com/llvm/llvm-project/issues/149560.
101 lines
3.2 KiB
C++
101 lines
3.2 KiB
C++
//===- DXContainerObjcopy.cpp ---------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ObjCopy/DXContainer/DXContainerObjcopy.h"
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#include "DXContainerReader.h"
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#include "DXContainerWriter.h"
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#include "llvm/ObjCopy/CommonConfig.h"
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#include "llvm/ObjCopy/DXContainer/DXContainerConfig.h"
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#include "llvm/Support/raw_ostream.h"
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namespace llvm {
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namespace objcopy {
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namespace dxbc {
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using namespace object;
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static Error extractPartAsObject(StringRef PartName, StringRef OutFilename,
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StringRef InputFilename, const Object &Obj) {
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for (const Part &P : Obj.Parts)
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if (P.Name == PartName) {
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Object PartObj;
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PartObj.Header = Obj.Header;
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PartObj.Parts.push_back({P.Name, P.Data});
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PartObj.recomputeHeader();
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auto Write = [&OutFilename, &PartObj](raw_ostream &Out) -> Error {
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DXContainerWriter Writer(PartObj, Out);
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if (Error E = Writer.write())
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return createFileError(OutFilename, std::move(E));
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return Error::success();
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};
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return writeToOutput(OutFilename, Write);
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}
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return createFileError(InputFilename, object_error::parse_failed,
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"part '%s' not found", PartName.str().c_str());
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}
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static Error handleArgs(const CommonConfig &Config, Object &Obj) {
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// Extract all sections before any modifications.
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for (StringRef Flag : Config.ExtractSection) {
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StringRef SectionName;
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StringRef FileName;
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std::tie(SectionName, FileName) = Flag.split('=');
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if (Error E = extractPartAsObject(SectionName, FileName,
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Config.InputFilename, Obj))
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return E;
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}
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std::function<bool(const Part &)> RemovePred = [](const Part &) {
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return false;
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};
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if (!Config.ToRemove.empty())
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RemovePred = [&Config](const Part &P) {
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return Config.ToRemove.matches(P.Name);
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};
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if (!Config.OnlySection.empty())
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RemovePred = [&Config](const Part &P) {
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// Explicitly keep these sections regardless of previous removes and
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// remove everything else.
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return !Config.OnlySection.matches(P.Name);
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};
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if (auto E = Obj.removeParts(RemovePred))
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return E;
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Obj.recomputeHeader();
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return Error::success();
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}
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Error executeObjcopyOnBinary(const CommonConfig &Config,
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const DXContainerConfig &,
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DXContainerObjectFile &In, raw_ostream &Out) {
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DXContainerReader Reader(In);
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Expected<std::unique_ptr<Object>> ObjOrErr = Reader.create();
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if (!ObjOrErr)
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return createFileError(Config.InputFilename, ObjOrErr.takeError());
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Object *Obj = ObjOrErr->get();
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assert(Obj && "Unable to deserialize DXContainer object");
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if (Error E = handleArgs(Config, *Obj))
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return E;
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DXContainerWriter Writer(*Obj, Out);
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if (Error E = Writer.write())
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return createFileError(Config.OutputFilename, std::move(E));
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return Error::success();
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}
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} // end namespace dxbc
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} // end namespace objcopy
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} // end namespace llvm
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