1//===-- RegisterUtilities.cpp -----------------------------------*- C++ -*-===//
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
12using namespace lldb_private;
13
14static llvm::Optional<uint32_t>
15getNoteType(const llvm::Triple &Triple,
16            llvm::ArrayRef<RegsetDesc> RegsetDescs) {
17  for (const auto &Entry : RegsetDescs) {
18    if (Entry.OS != Triple.getOS())
19      continue;
20    if (Entry.Arch != llvm::Triple::UnknownArch &&
21        Entry.Arch != Triple.getArch())
22      continue;
23    return Entry.Note;
24  }
25  return llvm::None;
26}
27
28DataExtractor lldb_private::getRegset(llvm::ArrayRef<CoreNote> Notes,
29                                      const llvm::Triple &Triple,
30                                      llvm::ArrayRef<RegsetDesc> RegsetDescs) {
31  auto TypeOr = getNoteType(Triple, RegsetDescs);
32  if (!TypeOr)
33    return DataExtractor();
34  uint32_t Type = *TypeOr;
35  auto Iter = llvm::find_if(
36      Notes, [Type](const CoreNote &Note) { return Note.info.n_type == Type; });
37  return Iter == Notes.end() ? DataExtractor() : Iter->data;
38}
39