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1 //===--- ARMWinEHPrinter.h - Windows on ARM Unwind Information Printer ----===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License.  See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #ifndef LLVM_TOOLS_LLVM_READOBJ_ARMWINEHPRINTER_H
11 #define LLVM_TOOLS_LLVM_READOBJ_ARMWINEHPRINTER_H
12 
13 #include "llvm/Object/COFF.h"
14 #include "llvm/Support/ErrorOr.h"
15 #include "llvm/Support/ScopedPrinter.h"
16 
17 namespace llvm {
18 namespace ARM {
19 namespace WinEH {
20 class RuntimeFunction;
21 
22 class Decoder {
23   static const size_t PDataEntrySize;
24 
25   ScopedPrinter &SW;
26   raw_ostream &OS;
27 
28   struct RingEntry {
29     uint8_t Mask;
30     uint8_t Value;
31     bool (Decoder::*Routine)(const uint8_t *, unsigned &, unsigned, bool);
32   };
33   static const RingEntry Ring[];
34 
35   bool opcode_0xxxxxxx(const uint8_t *Opcodes, unsigned &Offset,
36                        unsigned Length, bool Prologue);
37   bool opcode_10Lxxxxx(const uint8_t *Opcodes, unsigned &Offset,
38                        unsigned Length, bool Prologue);
39   bool opcode_1100xxxx(const uint8_t *Opcodes, unsigned &Offset,
40                        unsigned Length, bool Prologue);
41   bool opcode_11010Lxx(const uint8_t *Opcodes, unsigned &Offset,
42                        unsigned Length, bool Prologue);
43   bool opcode_11011Lxx(const uint8_t *Opcodes, unsigned &Offset,
44                        unsigned Length, bool Prologue);
45   bool opcode_11100xxx(const uint8_t *Opcodes, unsigned &Offset,
46                        unsigned Length, bool Prologue);
47   bool opcode_111010xx(const uint8_t *Opcodes, unsigned &Offset,
48                        unsigned Length, bool Prologue);
49   bool opcode_1110110L(const uint8_t *Opcodes, unsigned &Offset,
50                        unsigned Length, bool Prologue);
51   bool opcode_11101110(const uint8_t *Opcodes, unsigned &Offset,
52                        unsigned Length, bool Prologue);
53   bool opcode_11101111(const uint8_t *Opcodes, unsigned &Offset,
54                        unsigned Length, bool Prologue);
55   bool opcode_11110101(const uint8_t *Opcodes, unsigned &Offset,
56                        unsigned Length, bool Prologue);
57   bool opcode_11110110(const uint8_t *Opcodes, unsigned &Offset,
58                        unsigned Length, bool Prologue);
59   bool opcode_11110111(const uint8_t *Opcodes, unsigned &Offset,
60                        unsigned Length, bool Prologue);
61   bool opcode_11111000(const uint8_t *Opcodes, unsigned &Offset,
62                        unsigned Length, bool Prologue);
63   bool opcode_11111001(const uint8_t *Opcodes, unsigned &Offset,
64                        unsigned Length, bool Prologue);
65   bool opcode_11111010(const uint8_t *Opcodes, unsigned &Offset,
66                        unsigned Length, bool Prologue);
67   bool opcode_11111011(const uint8_t *Opcodes, unsigned &Offset,
68                        unsigned Length, bool Prologue);
69   bool opcode_11111100(const uint8_t *Opcodes, unsigned &Offset,
70                        unsigned Length, bool Prologue);
71   bool opcode_11111101(const uint8_t *Opcodes, unsigned &Offset,
72                        unsigned Length, bool Prologue);
73   bool opcode_11111110(const uint8_t *Opcodes, unsigned &Offset,
74                        unsigned Length, bool Prologue);
75   bool opcode_11111111(const uint8_t *Opcodes, unsigned &Offset,
76                        unsigned Length, bool Prologue);
77 
78   void decodeOpcodes(ArrayRef<uint8_t> Opcodes, unsigned Offset,
79                      bool Prologue);
80 
81   void printRegisters(const std::pair<uint16_t, uint32_t> &RegisterMask);
82 
83   ErrorOr<object::SectionRef>
84   getSectionContaining(const object::COFFObjectFile &COFF, uint64_t Address);
85 
86   ErrorOr<object::SymbolRef>
87   getSymbol(const object::COFFObjectFile &COFF, uint64_t Address,
88             bool FunctionOnly = false);
89 
90   ErrorOr<object::SymbolRef>
91   getRelocatedSymbol(const object::COFFObjectFile &COFF,
92                      const object::SectionRef &Section, uint64_t Offset);
93 
94   bool dumpXDataRecord(const object::COFFObjectFile &COFF,
95                        const object::SectionRef &Section,
96                        uint64_t FunctionAddress, uint64_t VA);
97   bool dumpUnpackedEntry(const object::COFFObjectFile &COFF,
98                          const object::SectionRef Section, uint64_t Offset,
99                          unsigned Index, const RuntimeFunction &Entry);
100   bool dumpPackedEntry(const object::COFFObjectFile &COFF,
101                        const object::SectionRef Section, uint64_t Offset,
102                        unsigned Index, const RuntimeFunction &Entry);
103   bool dumpProcedureDataEntry(const object::COFFObjectFile &COFF,
104                               const object::SectionRef Section, unsigned Entry,
105                               ArrayRef<uint8_t> Contents);
106   void dumpProcedureData(const object::COFFObjectFile &COFF,
107                          const object::SectionRef Section);
108 
109 public:
Decoder(ScopedPrinter & SW)110   Decoder(ScopedPrinter &SW) : SW(SW), OS(SW.getOStream()) {}
111   std::error_code dumpProcedureData(const object::COFFObjectFile &COFF);
112 };
113 }
114 }
115 }
116 
117 #endif
118