1 //===-- RegisterContextPOSIXCore_arm64.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_PROCESS_ELF_CORE_REGISTERCONTEXTPOSIXCORE_ARM64_H
10 #define LLDB_SOURCE_PLUGINS_PROCESS_ELF_CORE_REGISTERCONTEXTPOSIXCORE_ARM64_H
11 
12 #include "Plugins/Process/Utility/LinuxPTraceDefines_arm64sve.h"
13 #include "Plugins/Process/Utility/RegisterContextPOSIX_arm64.h"
14 #include "Plugins/Process/Utility/RegisterFlagsLinux_arm64.h"
15 
16 #include "Plugins/Process/elf-core/RegisterUtilities.h"
17 #include "lldb/Utility/DataBufferHeap.h"
18 #include "lldb/Utility/DataExtractor.h"
19 
20 class RegisterContextCorePOSIX_arm64 : public RegisterContextPOSIX_arm64 {
21 public:
22   static std::unique_ptr<RegisterContextCorePOSIX_arm64>
23   Create(lldb_private::Thread &thread, const lldb_private::ArchSpec &arch,
24          const lldb_private::DataExtractor &gpregset,
25          llvm::ArrayRef<lldb_private::CoreNote> notes);
26 
27   ~RegisterContextCorePOSIX_arm64() override;
28 
29   bool ReadRegister(const lldb_private::RegisterInfo *reg_info,
30                     lldb_private::RegisterValue &value) override;
31 
32   bool WriteRegister(const lldb_private::RegisterInfo *reg_info,
33                      const lldb_private::RegisterValue &value) override;
34 
35   bool ReadAllRegisterValues(lldb::WritableDataBufferSP &data_sp) override;
36 
37   bool WriteAllRegisterValues(const lldb::DataBufferSP &data_sp) override;
38 
39   bool HardwareSingleStep(bool enable) override;
40 
41 protected:
42   RegisterContextCorePOSIX_arm64(
43       lldb_private::Thread &thread,
44       std::unique_ptr<RegisterInfoPOSIX_arm64> register_info,
45       const lldb_private::DataExtractor &gpregset,
46       llvm::ArrayRef<lldb_private::CoreNote> notes);
47 
48   bool ReadGPR() override;
49 
50   bool ReadFPR() override;
51 
52   bool WriteGPR() override;
53 
54   bool WriteFPR() override;
55 
56 private:
57   lldb_private::DataExtractor m_gpr_data;
58   lldb_private::DataExtractor m_fpr_data;
59   lldb_private::DataExtractor m_sve_data;
60   lldb_private::DataExtractor m_pac_data;
61   lldb_private::DataExtractor m_tls_data;
62   lldb_private::DataExtractor m_za_data;
63   lldb_private::DataExtractor m_mte_data;
64   lldb_private::DataExtractor m_zt_data;
65 
66   SVEState m_sve_state = SVEState::Unknown;
67   uint16_t m_sve_vector_length = 0;
68 
69   // These are pseudo registers derived from the values in SSVE and ZA data.
70   struct __attribute__((packed)) sme_pseudo_regs {
71     uint64_t ctrl_reg;
72     uint64_t svg_reg;
73   };
74   static_assert(sizeof(sme_pseudo_regs) == 16);
75 
76   struct sme_pseudo_regs m_sme_pseudo_regs;
77 
78   lldb_private::LinuxArm64RegisterFlags m_linux_register_flags;
79 
80   const uint8_t *GetSVEBuffer(uint64_t offset = 0);
81 
82   void ConfigureRegisterContext();
83 
84   uint32_t CalculateSVEOffset(const lldb_private::RegisterInfo *reg_info);
85 
86   uint64_t GetSVERegVG() { return m_sve_vector_length / 8; }
87 };
88 
89 #endif // LLDB_SOURCE_PLUGINS_PROCESS_ELF_CORE_REGISTERCONTEXTPOSIXCORE_ARM64_H
90