lld/COFF/DLL.h

   1 //===- DLL.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 LLD_COFF_DLL_H
  10 #define LLD_COFF_DLL_H
  11
  12 #include "Chunks.h"
  13 #include "Symbols.h"
  14
  15 namespace lld::coff {
  16
  17 // Windows-specific.
  18 // IdataContents creates all chunks for the DLL import table.
  19 // You are supposed to call add() to add symbols and then
  20 // call create() to populate the chunk vectors.
  21 class IdataContents {
  22 public:
  23   void add(DefinedImportData *sym) { imports.push_back(sym); }
  24   bool empty() { return imports.empty(); }
  25
  26   void create(COFFLinkerContext &ctx);
  27
  28   std::vector<DefinedImportData *> imports;
  29   std::vector<Chunk *> dirs;
  30   std::vector<Chunk *> lookups;
  31   std::vector<Chunk *> addresses;
  32   std::vector<Chunk *> hints;
  33   std::vector<Chunk *> dllNames;
  34 };
  35
  36 // Windows-specific.
  37 // DelayLoadContents creates all chunks for the delay-load DLL import table.
  38 class DelayLoadContents {
  39 public:
  40   DelayLoadContents(COFFLinkerContext &ctx) : ctx(ctx) {}
  41   void add(DefinedImportData *sym) { imports.push_back(sym); }
  42   bool empty() { return imports.empty(); }
  43   void create(Defined *helper);
  44   std::vector<Chunk *> getChunks();
  45   std::vector<Chunk *> getDataChunks();
  46   ArrayRef<Chunk *> getCodeChunks() { return thunks; }
  47   ArrayRef<Chunk *> getCodePData() { return pdata; }
  48   ArrayRef<Chunk *> getCodeUnwindInfo() { return unwindinfo; }
  49
  50   uint64_t getDirRVA() { return dirs[0]->getRVA(); }
  51   uint64_t getDirSize();
  52
  53 private:
  54   Chunk *newThunkChunk(DefinedImportData *s, Chunk *tailMerge);
  55   Chunk *newTailMergeChunk(Chunk *dir);
  56   Chunk *newTailMergePDataChunk(Chunk *tm, Chunk *unwind);
  57   Chunk *newTailMergeUnwindInfoChunk();
  58
  59   Defined *helper;
  60   std::vector<DefinedImportData *> imports;
  61   std::vector<Chunk *> dirs;
  62   std::vector<Chunk *> moduleHandles;
  63   std::vector<Chunk *> addresses;
  64   std::vector<Chunk *> names;
  65   std::vector<Chunk *> hintNames;
  66   std::vector<Chunk *> thunks;
  67   std::vector<Chunk *> pdata;
  68   std::vector<Chunk *> unwindinfo;
  69   std::vector<Chunk *> dllNames;
  70
  71   COFFLinkerContext &ctx;
  72 };
  73
  74 // Windows-specific.
  75 // EdataContents creates all chunks for the DLL export table.
  76 class EdataContents {
  77 public:
  78   EdataContents(COFFLinkerContext &ctx);
  79   std::vector<Chunk *> chunks;
  80
  81   uint64_t getRVA() { return chunks[0]->getRVA(); }
  82   uint64_t getSize() {
  83     return chunks.back()->getRVA() + chunks.back()->getSize() - getRVA();
  84   }
  85
  86   COFFLinkerContext &ctx;
  87 };
  88
  89 } // namespace lld::coff
  90
  91 #endif