1 //===- DWARFRelocMap.h ------------------------------------------*- 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 #ifndef LLVM_DEBUGINFO_DWARF_DWARFRELOCMAP_H
10 #define LLVM_DEBUGINFO_DWARF_DWARFRELOCMAP_H
11 
12 #include "llvm/ADT/DenseMap.h"
13 #include "llvm/Object/ObjectFile.h"
14 #include "llvm/Object/RelocationResolver.h"
15 #include <cstdint>
16 
17 namespace llvm {
18 
19 /// RelocAddrEntry contains relocated value and section index.
20 /// Section index is -1LL if relocation points to absolute symbol.
21 struct RelocAddrEntry {
22   uint64_t SectionIndex;
23   object::RelocationRef Reloc;
24   uint64_t SymbolValue;
25   Optional<object::RelocationRef> Reloc2;
26   uint64_t SymbolValue2;
27   object::RelocationResolver Resolver;
28 };
29 
30 /// In place of applying the relocations to the data we've read from disk we use
31 /// a separate mapping table to the side and checking that at locations in the
32 /// dwarf where we expect relocated values. This adds a bit of complexity to the
33 /// dwarf parsing/extraction at the benefit of not allocating memory for the
34 /// entire size of the debug info sections.
35 using RelocAddrMap = DenseMap<uint64_t, RelocAddrEntry>;
36 
37 } // end namespace llvm
38 
39 #endif // LLVM_DEBUGINFO_DWARF_DWARFRELOCMAP_H
40