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 std::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