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
13using namespace lldb_private;
14
15static std::optional<uint32_t>
16getNoteType(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
29DataExtractor 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}
40