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
78