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   std::vector<Chunk *> auxIat;
  35   std::vector<Chunk *> auxIatCopy;
  36 };
  37
  38 // Windows-specific.
  39 // DelayLoadContents creates all chunks for the delay-load DLL import table.
  40 class DelayLoadContents {
  41 public:
  42   DelayLoadContents(COFFLinkerContext &ctx) : ctx(ctx) {}
  43   void add(DefinedImportData *sym) { imports.push_back(sym); }
  44   bool empty() { return imports.empty(); }
  45   void create(Defined *helper);
  46   std::vector<Chunk *> getChunks();
  47   std::vector<Chunk *> getDataChunks();
  48   ArrayRef<Chunk *> getCodeChunks() { return thunks; }
  49   ArrayRef<Chunk *> getCodePData() { return pdata; }
  50   ArrayRef<Chunk *> getCodeUnwindInfo() { return unwindinfo; }
  51   ArrayRef<Chunk *> getAuxIat() { return auxIat; }
  52   ArrayRef<Chunk *> getAuxIatCopy() { return auxIatCopy; }
  53
  54   uint64_t getDirRVA() { return dirs[0]->getRVA(); }
  55   uint64_t getDirSize();
  56
  57 private:
  58   Chunk *newThunkChunk(DefinedImportData *s, Chunk *tailMerge);
  59   Chunk *newTailMergeChunk(Chunk *dir);
  60   Chunk *newTailMergePDataChunk(Chunk *tm, Chunk *unwind);
  61   Chunk *newTailMergeUnwindInfoChunk();
  62
  63   Defined *helper;
  64   std::vector<DefinedImportData *> imports;
  65   std::vector<Chunk *> dirs;
  66   std::vector<Chunk *> moduleHandles;
  67   std::vector<Chunk *> addresses;
  68   std::vector<Chunk *> names;
  69   std::vector<Chunk *> hintNames;
  70   std::vector<Chunk *> thunks;
  71   std::vector<Chunk *> pdata;
  72   std::vector<Chunk *> unwindinfo;
  73   std::vector<Chunk *> dllNames;
  74   std::vector<Chunk *> auxIat;
  75   std::vector<Chunk *> auxIatCopy;
  76
  77   COFFLinkerContext &ctx;
  78 };
  79
  80 // Windows-specific.
  81 // EdataContents creates all chunks for the DLL export table.
  82 class EdataContents {
  83 public:
  84   EdataContents(COFFLinkerContext &ctx);
  85   std::vector<Chunk *> chunks;
  86
  87   uint64_t getRVA() { return chunks[0]->getRVA(); }
  88   uint64_t getSize() {
  89     return chunks.back()->getRVA() + chunks.back()->getSize() - getRVA();
  90   }
  91
  92   COFFLinkerContext &ctx;
  93 };
  94
  95 } // namespace lld::coff
  96
  97 #endif