lld/MachO/OutputSegment.h

   1 //===- OutputSegment.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_MACHO_OUTPUT_SEGMENT_H
  10 #define LLD_MACHO_OUTPUT_SEGMENT_H
  11
  12 #include "OutputSection.h"
  13 #include "Symbols.h"
  14 #include "lld/Common/LLVM.h"
  15 #include "llvm/ADT/TinyPtrVector.h"
  16
  17 #include <limits>
  18 #include <vector>
  19
  20 namespace lld {
  21 namespace macho {
  22
  23 namespace segment_names {
  24
  25 constexpr const char dataConst[] = "__DATA_CONST";
  26 constexpr const char dataDirty[] = "__DATA_DIRTY";
  27 constexpr const char data[] = "__DATA";
  28 constexpr const char dwarf[] = "__DWARF";
  29 constexpr const char import[] = "__IMPORT";
  30 constexpr const char ld[] = "__LD"; // output only with -r
  31 constexpr const char linkEdit[] = "__LINKEDIT";
  32 constexpr const char llvm[] = "__LLVM";
  33 constexpr const char pageZero[] = "__PAGEZERO";
  34 constexpr const char textExec[] = "__TEXT_EXEC";
  35 constexpr const char text[] = "__TEXT";
  36
  37 } // namespace segment_names
  38
  39 class OutputSection;
  40 class InputSection;
  41
  42 class OutputSegment {
  43 public:
  44   void addOutputSection(OutputSection *os);
  45   void sortOutputSections();
  46   void assignAddressesToStartEndSymbols();
  47
  48   const std::vector<OutputSection *> &getSections() const { return sections; }
  49   size_t numNonHiddenSections() const;
  50
  51   uint64_t fileOff = 0;
  52   uint64_t fileSize = 0;
  53   uint64_t addr = 0;
  54   uint64_t vmSize = 0;
  55   int inputOrder = UnspecifiedInputOrder;
  56   StringRef name;
  57   uint32_t maxProt = 0;
  58   uint32_t initProt = 0;
  59   uint8_t index;
  60
  61   llvm::TinyPtrVector<Defined *> segmentStartSymbols;
  62   llvm::TinyPtrVector<Defined *> segmentEndSymbols;
  63
  64 private:
  65   std::vector<OutputSection *> sections;
  66 };
  67
  68 extern std::vector<OutputSegment *> outputSegments;
  69
  70 void sortOutputSegments();
  71
  72 OutputSegment *getOrCreateOutputSegment(StringRef name);
  73
  74 } // namespace macho
  75 } // namespace lld
  76
  77 #endif