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 }
40