lldb/source/Plugins/Process/elf-core/RegisterUtilities.cpp

   1 //===-- RegisterUtilities.cpp ---------------------------------------------===//
   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 #include "Plugins/Process/elf-core/RegisterUtilities.h"
  10 #include "llvm/ADT/STLExtras.h"
  11 #include <optional>
  12
  13 using namespace lldb_private;
  14
  15 static std::optional<uint32_t>
  16 getNoteType(const llvm::Triple &Triple,
  17             llvm::ArrayRef<RegsetDesc> RegsetDescs) {
  18   for (const auto &Entry : RegsetDescs) {
  19     if (Entry.OS != Triple.getOS())
  20       continue;
  21     if (Entry.Arch != llvm::Triple::UnknownArch &&
  22         Entry.Arch != Triple.getArch())
  23       continue;
  24     return Entry.Note;
  25   }
  26   return std::nullopt;
  27 }
  28
  29 DataExtractor lldb_private::getRegset(llvm::ArrayRef<CoreNote> Notes,
  30                                       const llvm::Triple &Triple,
  31                                       llvm::ArrayRef<RegsetDesc> RegsetDescs) {
  32   auto TypeOr = getNoteType(Triple, RegsetDescs);
  33   if (!TypeOr)
  34     return DataExtractor();
  35   uint32_t Type = *TypeOr;
  36   auto Iter = llvm::find_if(
  37       Notes, [Type](const CoreNote &Note) { return Note.info.n_type == Type; });
  38   return Iter == Notes.end() ? DataExtractor() : DataExtractor(Iter->data);
  39 }