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