include/llvm/DebugInfo/DWARF/DWARFRelocMap.h

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