1 files changed, 329 insertions, 0 deletions

diff --git a/contrib/llvm-project/llvm/tools/llvm-objcopy/llvm-objcopy.cpp b/contrib/llvm-project/llvm/tools/llvm-objcopy/llvm-objcopy.cpp
new file mode 100644
index 000000000000..e9372176e43b
--- /dev/null
+++ b/contrib/llvm-project/llvm/tools/llvm-objcopy/llvm-objcopy.cpp
@@ -0,0 +1,329 @@
+//===- llvm-objcopy.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 "llvm-objcopy.h"
+#include "Buffer.h"
+#include "CopyConfig.h"
+#include "ELF/ELFObjcopy.h"
+#include "COFF/COFFObjcopy.h"
+#include "MachO/MachOObjcopy.h"
+
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/Twine.h"
+#include "llvm/Object/Archive.h"
+#include "llvm/Object/ArchiveWriter.h"
+#include "llvm/Object/Binary.h"
+#include "llvm/Object/COFF.h"
+#include "llvm/Object/ELFObjectFile.h"
+#include "llvm/Object/ELFTypes.h"
+#include "llvm/Object/Error.h"
+#include "llvm/Object/MachO.h"
+#include "llvm/Option/Arg.h"
+#include "llvm/Option/ArgList.h"
+#include "llvm/Option/Option.h"
+#include "llvm/Support/Casting.h"
+#include "llvm/Support/Error.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/ErrorOr.h"
+#include "llvm/Support/InitLLVM.h"
+#include "llvm/Support/Memory.h"
+#include "llvm/Support/Path.h"
+#include "llvm/Support/Process.h"
+#include "llvm/Support/WithColor.h"
+#include "llvm/Support/raw_ostream.h"
+#include <algorithm>
+#include <cassert>
+#include <cstdlib>
+#include <memory>
+#include <string>
+#include <system_error>
+#include <utility>
+
+namespace llvm {
+namespace objcopy {
+
+// The name this program was invoked as.
+StringRef ToolName;
+
+LLVM_ATTRIBUTE_NORETURN void error(Twine Message) {
+  WithColor::error(errs(), ToolName) << Message << "\n";
+  exit(1);
+}
+
+LLVM_ATTRIBUTE_NORETURN void error(Error E) {
+  assert(E);
+  std::string Buf;
+  raw_string_ostream OS(Buf);
+  logAllUnhandledErrors(std::move(E), OS);
+  OS.flush();
+  WithColor::error(errs(), ToolName) << Buf;
+  exit(1);
+}
+
+LLVM_ATTRIBUTE_NORETURN void reportError(StringRef File, std::error_code EC) {
+  assert(EC);
+  error(createFileError(File, EC));
+}
+
+LLVM_ATTRIBUTE_NORETURN void reportError(StringRef File, Error E) {
+  assert(E);
+  std::string Buf;
+  raw_string_ostream OS(Buf);
+  logAllUnhandledErrors(std::move(E), OS);
+  OS.flush();
+  WithColor::error(errs(), ToolName) << "'" << File << "': " << Buf;
+  exit(1);
+}
+
+ErrorSuccess reportWarning(Error E) {
+  assert(E);
+  WithColor::warning(errs(), ToolName) << toString(std::move(E));
+  return Error::success();
+}
+
+} // end namespace objcopy
+} // end namespace llvm
+
+using namespace llvm;
+using namespace llvm::object;
+using namespace llvm::objcopy;
+
+// For regular archives this function simply calls llvm::writeArchive,
+// For thin archives it writes the archive file itself as well as its members.
+static Error deepWriteArchive(StringRef ArcName,
+                              ArrayRef<NewArchiveMember> NewMembers,
+                              bool WriteSymtab, object::Archive::Kind Kind,
+                              bool Deterministic, bool Thin) {
+  if (Error E = writeArchive(ArcName, NewMembers, WriteSymtab, Kind,
+                             Deterministic, Thin))
+    return createFileError(ArcName, std::move(E));
+
+  if (!Thin)
+    return Error::success();
+
+  for (const NewArchiveMember &Member : NewMembers) {
+    // Internally, FileBuffer will use the buffer created by
+    // FileOutputBuffer::create, for regular files (that is the case for
+    // deepWriteArchive) FileOutputBuffer::create will return OnDiskBuffer.
+    // OnDiskBuffer uses a temporary file and then renames it. So in reality
+    // there is no inefficiency / duplicated in-memory buffers in this case. For
+    // now in-memory buffers can not be completely avoided since
+    // NewArchiveMember still requires them even though writeArchive does not
+    // write them on disk.
+    FileBuffer FB(Member.MemberName);
+    if (Error E = FB.allocate(Member.Buf->getBufferSize()))
+      return E;
+    std::copy(Member.Buf->getBufferStart(), Member.Buf->getBufferEnd(),
+              FB.getBufferStart());
+    if (Error E = FB.commit())
+      return E;
+  }
+  return Error::success();
+}
+
+/// The function executeObjcopyOnIHex does the dispatch based on the format
+/// of the output specified by the command line options.
+static Error executeObjcopyOnIHex(const CopyConfig &Config, MemoryBuffer &In,
+                                  Buffer &Out) {
+  // TODO: support output formats other than ELF.
+  return elf::executeObjcopyOnIHex(Config, In, Out);
+}
+
+/// The function executeObjcopyOnRawBinary does the dispatch based on the format
+/// of the output specified by the command line options.
+static Error executeObjcopyOnRawBinary(const CopyConfig &Config,
+                                       MemoryBuffer &In, Buffer &Out) {
+  switch (Config.OutputFormat) {
+  case FileFormat::ELF:
+  // FIXME: Currently, we call elf::executeObjcopyOnRawBinary even if the
+  // output format is binary/ihex or it's not given. This behavior differs from
+  // GNU objcopy. See https://bugs.llvm.org/show_bug.cgi?id=42171 for details.
+  case FileFormat::Binary:
+  case FileFormat::IHex:
+  case FileFormat::Unspecified:
+    return elf::executeObjcopyOnRawBinary(Config, In, Out);
+  }
+
+  llvm_unreachable("unsupported output format");
+}
+
+/// The function executeObjcopyOnBinary does the dispatch based on the format
+/// of the input binary (ELF, MachO or COFF).
+static Error executeObjcopyOnBinary(const CopyConfig &Config,
+                                    object::Binary &In, Buffer &Out) {
+  if (auto *ELFBinary = dyn_cast<object::ELFObjectFileBase>(&In))
+    return elf::executeObjcopyOnBinary(Config, *ELFBinary, Out);
+  else if (auto *COFFBinary = dyn_cast<object::COFFObjectFile>(&In))
+    return coff::executeObjcopyOnBinary(Config, *COFFBinary, Out);
+  else if (auto *MachOBinary = dyn_cast<object::MachOObjectFile>(&In))
+    return macho::executeObjcopyOnBinary(Config, *MachOBinary, Out);
+  else
+    return createStringError(object_error::invalid_file_type,
+                             "unsupported object file format");
+}
+
+static Error executeObjcopyOnArchive(const CopyConfig &Config,
+                                     const Archive &Ar) {
+  std::vector<NewArchiveMember> NewArchiveMembers;
+  Error Err = Error::success();
+  for (const Archive::Child &Child : Ar.children(Err)) {
+    Expected<StringRef> ChildNameOrErr = Child.getName();
+    if (!ChildNameOrErr)
+      return createFileError(Ar.getFileName(), ChildNameOrErr.takeError());
+
+    Expected<std::unique_ptr<Binary>> ChildOrErr = Child.getAsBinary();
+    if (!ChildOrErr)
+      return createFileError(Ar.getFileName() + "(" + *ChildNameOrErr + ")",
+                             ChildOrErr.takeError());
+
+    MemBuffer MB(ChildNameOrErr.get());
+    if (Error E = executeObjcopyOnBinary(Config, *ChildOrErr->get(), MB))
+      return E;
+
+    Expected<NewArchiveMember> Member =
+        NewArchiveMember::getOldMember(Child, Config.DeterministicArchives);
+    if (!Member)
+      return createFileError(Ar.getFileName(), Member.takeError());
+    Member->Buf = MB.releaseMemoryBuffer();
+    Member->MemberName = Member->Buf->getBufferIdentifier();
+    NewArchiveMembers.push_back(std::move(*Member));
+  }
+  if (Err)
+    return createFileError(Config.InputFilename, std::move(Err));
+
+  return deepWriteArchive(Config.OutputFilename, NewArchiveMembers,
+                          Ar.hasSymbolTable(), Ar.kind(),
+                          Config.DeterministicArchives, Ar.isThin());
+}
+
+static Error restoreStatOnFile(StringRef Filename,
+                               const sys::fs::file_status &Stat,
+                               bool PreserveDates) {
+  int FD;
+
+  // Writing to stdout should not be treated as an error here, just
+  // do not set access/modification times or permissions.
+  if (Filename == "-")
+    return Error::success();
+
+  if (auto EC =
+          sys::fs::openFileForWrite(Filename, FD, sys::fs::CD_OpenExisting))
+    return createFileError(Filename, EC);
+
+  if (PreserveDates)
+    if (auto EC = sys::fs::setLastAccessAndModificationTime(
+            FD, Stat.getLastAccessedTime(), Stat.getLastModificationTime()))
+      return createFileError(Filename, EC);
+
+  sys::fs::file_status OStat;
+  if (std::error_code EC = sys::fs::status(FD, OStat))
+    return createFileError(Filename, EC);
+  if (OStat.type() == sys::fs::file_type::regular_file)
+#ifdef _WIN32
+    if (auto EC = sys::fs::setPermissions(
+            Filename, static_cast<sys::fs::perms>(Stat.permissions() &
+                                                  ~sys::fs::getUmask())))
+#else
+    if (auto EC = sys::fs::setPermissions(
+            FD, static_cast<sys::fs::perms>(Stat.permissions() &
+                                            ~sys::fs::getUmask())))
+#endif
+      return createFileError(Filename, EC);
+
+  if (auto EC = sys::Process::SafelyCloseFileDescriptor(FD))
+    return createFileError(Filename, EC);
+
+  return Error::success();
+}
+
+/// The function executeObjcopy does the higher level dispatch based on the type
+/// of input (raw binary, archive or single object file) and takes care of the
+/// format-agnostic modifications, i.e. preserving dates.
+static Error executeObjcopy(const CopyConfig &Config) {
+  sys::fs::file_status Stat;
+  if (Config.InputFilename != "-") {
+    if (auto EC = sys::fs::status(Config.InputFilename, Stat))
+      return createFileError(Config.InputFilename, EC);
+  } else {
+    Stat.permissions(static_cast<sys::fs::perms>(0777));
+  }
+
+  typedef Error (*ProcessRawFn)(const CopyConfig &, MemoryBuffer &, Buffer &);
+  ProcessRawFn ProcessRaw;
+  switch (Config.InputFormat) {
+  case FileFormat::Binary:
+    ProcessRaw = executeObjcopyOnRawBinary;
+    break;
+  case FileFormat::IHex:
+    ProcessRaw = executeObjcopyOnIHex;
+    break;
+  default:
+    ProcessRaw = nullptr;
+  }
+
+  if (ProcessRaw) {
+    auto BufOrErr = MemoryBuffer::getFileOrSTDIN(Config.InputFilename);
+    if (!BufOrErr)
+      return createFileError(Config.InputFilename, BufOrErr.getError());
+    FileBuffer FB(Config.OutputFilename);
+    if (Error E = ProcessRaw(Config, *BufOrErr->get(), FB))
+      return E;
+  } else {
+    Expected<OwningBinary<llvm::object::Binary>> BinaryOrErr =
+        createBinary(Config.InputFilename);
+    if (!BinaryOrErr)
+      return createFileError(Config.InputFilename, BinaryOrErr.takeError());
+
+    if (Archive *Ar = dyn_cast<Archive>(BinaryOrErr.get().getBinary())) {
+      if (Error E = executeObjcopyOnArchive(Config, *Ar))
+        return E;
+    } else {
+      FileBuffer FB(Config.OutputFilename);
+      if (Error E = executeObjcopyOnBinary(Config,
+                                           *BinaryOrErr.get().getBinary(), FB))
+        return E;
+    }
+  }
+
+  if (Error E =
+          restoreStatOnFile(Config.OutputFilename, Stat, Config.PreserveDates))
+    return E;
+
+  if (!Config.SplitDWO.empty()) {
+    Stat.permissions(static_cast<sys::fs::perms>(0666));
+    if (Error E =
+            restoreStatOnFile(Config.SplitDWO, Stat, Config.PreserveDates))
+      return E;
+  }
+
+  return Error::success();
+}
+
+int main(int argc, char **argv) {
+  InitLLVM X(argc, argv);
+  ToolName = argv[0];
+  bool IsStrip = sys::path::stem(ToolName).contains("strip");
+  Expected<DriverConfig> DriverConfig =
+      IsStrip ? parseStripOptions(makeArrayRef(argv + 1, argc), reportWarning)
+              : parseObjcopyOptions(makeArrayRef(argv + 1, argc));
+  if (!DriverConfig) {
+    logAllUnhandledErrors(DriverConfig.takeError(),
+                          WithColor::error(errs(), ToolName));
+    return 1;
+  }
+  for (const CopyConfig &CopyConfig : DriverConfig->CopyConfigs) {
+    if (Error E = executeObjcopy(CopyConfig)) {
+      logAllUnhandledErrors(std::move(E), WithColor::error(errs(), ToolName));
+      return 1;
+    }
+  }
+
+  return 0;
+}