1 //===-- ObjectContainerUniversalMachO.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 LLDB_SOURCE_PLUGINS_OBJECTCONTAINER_UNIVERSAL_MACH_O_OBJECTCONTAINERUNIVERSALMACHO_H
10 #define LLDB_SOURCE_PLUGINS_OBJECTCONTAINER_UNIVERSAL_MACH_O_OBJECTCONTAINERUNIVERSALMACHO_H
11 
12 #include "lldb/Host/SafeMachO.h"
13 #include "lldb/Symbol/ObjectContainer.h"
14 #include "lldb/Utility/FileSpec.h"
15 
16 class ObjectContainerUniversalMachO : public lldb_private::ObjectContainer {
17 public:
18   ObjectContainerUniversalMachO(const lldb::ModuleSP &module_sp,
19                                 lldb::DataBufferSP &data_sp,
20                                 lldb::offset_t data_offset,
21                                 const lldb_private::FileSpec *file,
22                                 lldb::offset_t offset, lldb::offset_t length);
23 
24   ~ObjectContainerUniversalMachO() override;
25 
26   // Static Functions
27   static void Initialize();
28 
29   static void Terminate();
30 
GetPluginNameStatic()31   static llvm::StringRef GetPluginNameStatic() { return "mach-o"; }
32 
GetPluginDescriptionStatic()33   static llvm::StringRef GetPluginDescriptionStatic() {
34     return "Universal mach-o object container reader.";
35   }
36 
37   static lldb_private::ObjectContainer *
38   CreateInstance(const lldb::ModuleSP &module_sp, lldb::DataBufferSP &data_sp,
39                  lldb::offset_t data_offset, const lldb_private::FileSpec *file,
40                  lldb::offset_t offset, lldb::offset_t length);
41 
42   static size_t GetModuleSpecifications(const lldb_private::FileSpec &file,
43                                         lldb::DataBufferSP &data_sp,
44                                         lldb::offset_t data_offset,
45                                         lldb::offset_t file_offset,
46                                         lldb::offset_t length,
47                                         lldb_private::ModuleSpecList &specs);
48 
49   static bool MagicBytesMatch(const lldb_private::DataExtractor &data);
50 
51   // Member Functions
52   bool ParseHeader() override;
53 
54   size_t GetNumArchitectures() const override;
55 
56   bool GetArchitectureAtIndex(uint32_t cpu_idx,
57                               lldb_private::ArchSpec &arch) const override;
58 
59   lldb::ObjectFileSP GetObjectFile(const lldb_private::FileSpec *file) override;
60 
61   // PluginInterface protocol
GetPluginName()62   llvm::StringRef GetPluginName() override { return GetPluginNameStatic(); }
63 
64 protected:
65   llvm::MachO::fat_header m_header;
66 
67   struct FatArch {
FatArchFatArch68     FatArch(llvm::MachO::fat_arch arch) : m_arch(arch), m_is_fat64(false) {}
FatArchFatArch69     FatArch(llvm::MachO::fat_arch_64 arch) : m_arch(arch), m_is_fat64(true) {}
70 
GetCPUTypeFatArch71     uint32_t GetCPUType() const {
72       return m_is_fat64 ? m_arch.fat_arch_64.cputype : m_arch.fat_arch.cputype;
73     }
74 
GetCPUSubTypeFatArch75     uint32_t GetCPUSubType() const {
76       return m_is_fat64 ? m_arch.fat_arch_64.cpusubtype
77                         : m_arch.fat_arch.cpusubtype;
78     }
79 
GetOffsetFatArch80     uint64_t GetOffset() const {
81       return m_is_fat64 ? m_arch.fat_arch_64.offset : m_arch.fat_arch.offset;
82     }
83 
GetSizeFatArch84     uint64_t GetSize() const {
85       return m_is_fat64 ? m_arch.fat_arch_64.size : m_arch.fat_arch.size;
86     }
87 
GetAlignFatArch88     uint32_t GetAlign() const {
89       return m_is_fat64 ? m_arch.fat_arch_64.align : m_arch.fat_arch.align;
90     }
91 
92   private:
93     const union Arch {
Arch(llvm::MachO::fat_arch arch)94       Arch(llvm::MachO::fat_arch arch) : fat_arch(arch) {}
Arch(llvm::MachO::fat_arch_64 arch)95       Arch(llvm::MachO::fat_arch_64 arch) : fat_arch_64(arch) {}
96       llvm::MachO::fat_arch fat_arch;
97       llvm::MachO::fat_arch_64 fat_arch_64;
98     } m_arch;
99     const bool m_is_fat64;
100   };
101   std::vector<FatArch> m_fat_archs;
102 
103   static bool ParseHeader(lldb_private::DataExtractor &data,
104                           llvm::MachO::fat_header &header,
105                           std::vector<FatArch> &fat_archs);
106 };
107 
108 #endif // LLDB_SOURCE_PLUGINS_OBJECTCONTAINER_UNIVERSAL_MACH_O_OBJECTCONTAINERUNIVERSALMACHO_H
109