You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
114 lines
4.3 KiB
114 lines
4.3 KiB
//===- WasmObjcopy.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 "WasmObjcopy.h"
|
|
#include "Buffer.h"
|
|
#include "CopyConfig.h"
|
|
#include "Object.h"
|
|
#include "Reader.h"
|
|
#include "Writer.h"
|
|
#include "llvm/Support/Errc.h"
|
|
|
|
namespace llvm {
|
|
namespace objcopy {
|
|
namespace wasm {
|
|
|
|
using namespace object;
|
|
|
|
static Error dumpSectionToFile(StringRef SecName, StringRef Filename,
|
|
Object &Obj) {
|
|
for (const Section &Sec : Obj.Sections) {
|
|
if (Sec.Name == SecName) {
|
|
ArrayRef<uint8_t> Contents = Sec.Contents;
|
|
Expected<std::unique_ptr<FileOutputBuffer>> BufferOrErr =
|
|
FileOutputBuffer::create(Filename, Contents.size());
|
|
if (!BufferOrErr)
|
|
return BufferOrErr.takeError();
|
|
std::unique_ptr<FileOutputBuffer> Buf = std::move(*BufferOrErr);
|
|
std::copy(Contents.begin(), Contents.end(), Buf->getBufferStart());
|
|
if (Error E = Buf->commit())
|
|
return E;
|
|
return Error::success();
|
|
}
|
|
}
|
|
return createStringError(errc::invalid_argument, "section '%s' not found",
|
|
SecName.str().c_str());
|
|
}
|
|
static Error handleArgs(const CopyConfig &Config, Object &Obj) {
|
|
// Only support AddSection, DumpSection, RemoveSection for now.
|
|
for (StringRef Flag : Config.DumpSection) {
|
|
StringRef SecName;
|
|
StringRef FileName;
|
|
std::tie(SecName, FileName) = Flag.split("=");
|
|
if (Error E = dumpSectionToFile(SecName, FileName, Obj))
|
|
return createFileError(FileName, std::move(E));
|
|
}
|
|
|
|
Obj.removeSections([&Config](const Section &Sec) {
|
|
if (Config.ToRemove.matches(Sec.Name))
|
|
return true;
|
|
return false;
|
|
});
|
|
|
|
for (StringRef Flag : Config.AddSection) {
|
|
StringRef SecName, FileName;
|
|
std::tie(SecName, FileName) = Flag.split("=");
|
|
ErrorOr<std::unique_ptr<MemoryBuffer>> BufOrErr =
|
|
MemoryBuffer::getFile(FileName);
|
|
if (!BufOrErr)
|
|
return createFileError(FileName, errorCodeToError(BufOrErr.getError()));
|
|
Section Sec;
|
|
Sec.SectionType = llvm::wasm::WASM_SEC_CUSTOM;
|
|
Sec.Name = SecName;
|
|
std::unique_ptr<MemoryBuffer> Buf = std::move(*BufOrErr);
|
|
Sec.Contents = makeArrayRef<uint8_t>(
|
|
reinterpret_cast<const uint8_t *>(Buf->getBufferStart()),
|
|
Buf->getBufferSize());
|
|
Obj.addSectionWithOwnedContents(Sec, std::move(Buf));
|
|
}
|
|
|
|
if (!Config.AddGnuDebugLink.empty() || !Config.BuildIdLinkDir.empty() ||
|
|
Config.BuildIdLinkInput || Config.BuildIdLinkOutput ||
|
|
Config.ExtractPartition || !Config.SplitDWO.empty() ||
|
|
!Config.SymbolsPrefix.empty() || !Config.AllocSectionsPrefix.empty() ||
|
|
Config.DiscardMode != DiscardType::None || Config.NewSymbolVisibility ||
|
|
!Config.SymbolsToAdd.empty() || !Config.RPathToAdd.empty() ||
|
|
!Config.OnlySection.empty() || !Config.SymbolsToGlobalize.empty() ||
|
|
!Config.SymbolsToKeep.empty() || !Config.SymbolsToLocalize.empty() ||
|
|
!Config.SymbolsToRemove.empty() ||
|
|
!Config.UnneededSymbolsToRemove.empty() ||
|
|
!Config.SymbolsToWeaken.empty() || !Config.SymbolsToKeepGlobal.empty() ||
|
|
!Config.SectionsToRename.empty() || !Config.SetSectionAlignment.empty() ||
|
|
!Config.SetSectionFlags.empty() || !Config.SymbolsToRename.empty()) {
|
|
return createStringError(
|
|
llvm::errc::invalid_argument,
|
|
"only add-section, dump-section, and remove-section are supported");
|
|
}
|
|
return Error::success();
|
|
}
|
|
|
|
Error executeObjcopyOnBinary(const CopyConfig &Config,
|
|
object::WasmObjectFile &In, Buffer &Out) {
|
|
Reader TheReader(In);
|
|
Expected<std::unique_ptr<Object>> ObjOrErr = TheReader.create();
|
|
if (!ObjOrErr)
|
|
return createFileError(Config.InputFilename, ObjOrErr.takeError());
|
|
Object *Obj = ObjOrErr->get();
|
|
assert(Obj && "Unable to deserialize Wasm object");
|
|
if (Error E = handleArgs(Config, *Obj))
|
|
return E;
|
|
Writer TheWriter(*Obj, Out);
|
|
if (Error E = TheWriter.write())
|
|
return createFileError(Config.OutputFilename, std::move(E));
|
|
return Error::success();
|
|
}
|
|
|
|
} // end namespace wasm
|
|
} // end namespace objcopy
|
|
} // end namespace llvm
|