1 //
2 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
3 // See https://llvm.org/LICENSE.txt for license information.
4 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
5 //
6 //===----------------------------------------------------------------------===//
7 
8 #ifndef LLVM_TOOLS_LLVM_OBJDUMP_LLVM_OBJDUMP_H
9 #define LLVM_TOOLS_LLVM_OBJDUMP_LLVM_OBJDUMP_H
10 
11 #include "llvm/ADT/StringSet.h"
12 #include "llvm/DebugInfo/DIContext.h"
13 #include "llvm/MC/MCDisassembler/MCDisassembler.h"
14 #include "llvm/Object/Archive.h"
15 #include "llvm/Support/CommandLine.h"
16 #include "llvm/Support/Compiler.h"
17 #include "llvm/Support/DataTypes.h"
18 
19 namespace llvm {
20 class StringRef;
21 class Twine;
22 
23 namespace object {
24 class ELFObjectFileBase;
25 class ELFSectionRef;
26 class MachOObjectFile;
27 class MachOUniversalBinary;
28 class RelocationRef;
29 } // namespace object
30 
31 namespace objdump {
32 
33 extern cl::opt<bool> ArchiveHeaders;
34 extern cl::opt<bool> Demangle;
35 extern cl::opt<bool> Disassemble;
36 extern cl::opt<bool> DisassembleAll;
37 extern cl::opt<DIDumpType> DwarfDumpType;
38 extern cl::list<std::string> FilterSections;
39 extern cl::list<std::string> MAttrs;
40 extern cl::opt<std::string> MCPU;
41 extern cl::opt<bool> NoShowRawInsn;
42 extern cl::opt<bool> NoLeadingAddr;
43 extern cl::opt<std::string> Prefix;
44 extern cl::opt<bool> PrintImmHex;
45 extern cl::opt<bool> PrivateHeaders;
46 extern cl::opt<bool> Relocations;
47 extern cl::opt<bool> SectionHeaders;
48 extern cl::opt<bool> SectionContents;
49 extern cl::opt<bool> SymbolDescription;
50 extern cl::opt<bool> SymbolTable;
51 extern cl::opt<std::string> TripleName;
52 extern cl::opt<bool> UnwindInfo;
53 
54 extern StringSet<> FoundSectionSet;
55 
56 typedef std::function<bool(llvm::object::SectionRef const &)> FilterPredicate;
57 
58 /// A filtered iterator for SectionRefs that skips sections based on some given
59 /// predicate.
60 class SectionFilterIterator {
61 public:
62   SectionFilterIterator(FilterPredicate P,
63                         llvm::object::section_iterator const &I,
64                         llvm::object::section_iterator const &E)
65       : Predicate(std::move(P)), Iterator(I), End(E) {
66     ScanPredicate();
67   }
68   const llvm::object::SectionRef &operator*() const { return *Iterator; }
69   SectionFilterIterator &operator++() {
70     ++Iterator;
71     ScanPredicate();
72     return *this;
73   }
74   bool operator!=(SectionFilterIterator const &Other) const {
75     return Iterator != Other.Iterator;
76   }
77 
78 private:
79   void ScanPredicate() {
80     while (Iterator != End && !Predicate(*Iterator)) {
81       ++Iterator;
82     }
83   }
84   FilterPredicate Predicate;
85   llvm::object::section_iterator Iterator;
86   llvm::object::section_iterator End;
87 };
88 
89 /// Creates an iterator range of SectionFilterIterators for a given Object and
90 /// predicate.
91 class SectionFilter {
92 public:
93   SectionFilter(FilterPredicate P, llvm::object::ObjectFile const &O)
94       : Predicate(std::move(P)), Object(O) {}
95   SectionFilterIterator begin() {
96     return SectionFilterIterator(Predicate, Object.section_begin(),
97                                  Object.section_end());
98   }
99   SectionFilterIterator end() {
100     return SectionFilterIterator(Predicate, Object.section_end(),
101                                  Object.section_end());
102   }
103 
104 private:
105   FilterPredicate Predicate;
106   llvm::object::ObjectFile const &Object;
107 };
108 
109 // Various helper functions.
110 
111 /// Creates a SectionFilter with a standard predicate that conditionally skips
112 /// sections when the --section objdump flag is provided.
113 ///
114 /// Idx is an optional output parameter that keeps track of which section index
115 /// this is. This may be different than the actual section number, as some
116 /// sections may be filtered (e.g. symbol tables).
117 SectionFilter ToolSectionFilter(llvm::object::ObjectFile const &O,
118                                 uint64_t *Idx = nullptr);
119 
120 bool isRelocAddressLess(object::RelocationRef A, object::RelocationRef B);
121 void printRelocations(const object::ObjectFile *O);
122 void printDynamicRelocations(const object::ObjectFile *O);
123 void printSectionHeaders(const object::ObjectFile *O);
124 void printSectionContents(const object::ObjectFile *O);
125 void printSymbolTable(const object::ObjectFile *O, StringRef ArchiveName,
126                       StringRef ArchitectureName = StringRef(),
127                       bool DumpDynamic = false);
128 void printSymbol(const object::ObjectFile *O, const object::SymbolRef &Symbol,
129                  StringRef FileName, StringRef ArchiveName,
130                  StringRef ArchitectureName, bool DumpDynamic);
131 LLVM_ATTRIBUTE_NORETURN void reportError(StringRef File, const Twine &Message);
132 LLVM_ATTRIBUTE_NORETURN void reportError(Error E, StringRef FileName,
133                                          StringRef ArchiveName = "",
134                                          StringRef ArchitectureName = "");
135 void reportWarning(const Twine &Message, StringRef File);
136 
137 template <typename T, typename... Ts>
138 T unwrapOrError(Expected<T> EO, Ts &&... Args) {
139   if (EO)
140     return std::move(*EO);
141   reportError(EO.takeError(), std::forward<Ts>(Args)...);
142 }
143 
144 std::string getFileNameForError(const object::Archive::Child &C,
145                                 unsigned Index);
146 SymbolInfoTy createSymbolInfo(const object::ObjectFile *Obj,
147                               const object::SymbolRef &Symbol);
148 
149 } // namespace objdump
150 } // end namespace llvm
151 
152 #endif
153