source/Plugins/Process/Linux/NativeRegisterContextLinux_arm64.h

   1 //===-- NativeRegisterContextLinux_arm64.h ---------------------*- C++ -*-===//
   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 #if defined(__arm64__) || defined(__aarch64__)
  11
  12 #ifndef lldb_NativeRegisterContextLinux_arm64_h
  13 #define lldb_NativeRegisterContextLinux_arm64_h
  14
  15 #include "Plugins/Process/Linux/NativeRegisterContextLinux.h"
  16 #include "Plugins/Process/Utility/lldb-arm64-register-enums.h"
  17
  18 namespace lldb_private {
  19 namespace process_linux {
  20
  21 class NativeProcessLinux;
  22
  23 class NativeRegisterContextLinux_arm64 : public NativeRegisterContextLinux {
  24 public:
  25   NativeRegisterContextLinux_arm64(const ArchSpec &target_arch,
  26                                    NativeThreadProtocol &native_thread);
  27
  28   uint32_t GetRegisterSetCount() const override;
  29
  30   uint32_t GetUserRegisterCount() const override;
  31
  32   const RegisterSet *GetRegisterSet(uint32_t set_index) const override;
  33
  34   Status ReadRegister(const RegisterInfo *reg_info,
  35                       RegisterValue &reg_value) override;
  36
  37   Status WriteRegister(const RegisterInfo *reg_info,
  38                        const RegisterValue &reg_value) override;
  39
  40   Status ReadAllRegisterValues(lldb::DataBufferSP &data_sp) override;
  41
  42   Status WriteAllRegisterValues(const lldb::DataBufferSP &data_sp) override;
  43
  44   //------------------------------------------------------------------
  45   // Hardware breakpoints/watchpoint management functions
  46   //------------------------------------------------------------------
  47
  48   uint32_t NumSupportedHardwareBreakpoints() override;
  49
  50   uint32_t SetHardwareBreakpoint(lldb::addr_t addr, size_t size) override;
  51
  52   bool ClearHardwareBreakpoint(uint32_t hw_idx) override;
  53
  54   Status ClearAllHardwareBreakpoints() override;
  55
  56   Status GetHardwareBreakHitIndex(uint32_t &bp_index,
  57                                   lldb::addr_t trap_addr) override;
  58
  59   uint32_t NumSupportedHardwareWatchpoints() override;
  60
  61   uint32_t SetHardwareWatchpoint(lldb::addr_t addr, size_t size,
  62                                  uint32_t watch_flags) override;
  63
  64   bool ClearHardwareWatchpoint(uint32_t hw_index) override;
  65
  66   Status ClearAllHardwareWatchpoints() override;
  67
  68   Status GetWatchpointHitIndex(uint32_t &wp_index,
  69                                lldb::addr_t trap_addr) override;
  70
  71   lldb::addr_t GetWatchpointHitAddress(uint32_t wp_index) override;
  72
  73   lldb::addr_t GetWatchpointAddress(uint32_t wp_index) override;
  74
  75   uint32_t GetWatchpointSize(uint32_t wp_index);
  76
  77   bool WatchpointIsEnabled(uint32_t wp_index);
  78
  79   // Debug register type select
  80   enum DREGType { eDREGTypeWATCH = 0, eDREGTypeBREAK };
  81
  82 protected:
  83   Status DoReadRegisterValue(uint32_t offset, const char *reg_name,
  84                              uint32_t size, RegisterValue &value) override;
  85
  86   Status DoWriteRegisterValue(uint32_t offset, const char *reg_name,
  87                               const RegisterValue &value) override;
  88
  89   Status DoReadGPR(void *buf, size_t buf_size) override;
  90
  91   Status DoWriteGPR(void *buf, size_t buf_size) override;
  92
  93   Status DoReadFPR(void *buf, size_t buf_size) override;
  94
  95   Status DoWriteFPR(void *buf, size_t buf_size) override;
  96
  97   void *GetGPRBuffer() override { return &m_gpr_arm64; }
  98
  99   void *GetFPRBuffer() override { return &m_fpr; }
 100
 101   size_t GetFPRSize() override { return sizeof(m_fpr); }
 102
 103 private:
 104   struct RegInfo {
 105     uint32_t num_registers;
 106     uint32_t num_gpr_registers;
 107     uint32_t num_fpr_registers;
 108
 109     uint32_t last_gpr;
 110     uint32_t first_fpr;
 111     uint32_t last_fpr;
 112
 113     uint32_t first_fpr_v;
 114     uint32_t last_fpr_v;
 115
 116     uint32_t gpr_flags;
 117   };
 118
 119   // based on RegisterContextDarwin_arm64.h
 120   struct VReg {
 121     uint8_t bytes[16];
 122   };
 123
 124   // based on RegisterContextDarwin_arm64.h
 125   struct FPU {
 126     VReg v[32];
 127     uint32_t fpsr;
 128     uint32_t fpcr;
 129   };
 130
 131   uint64_t m_gpr_arm64[k_num_gpr_registers_arm64]; // 64-bit general purpose
 132                                                    // registers.
 133   RegInfo m_reg_info;
 134   FPU m_fpr; // floating-point registers including extended register sets.
 135
 136   // Debug register info for hardware breakpoints and watchpoints management.
 137   struct DREG {
 138     lldb::addr_t address;  // Breakpoint/watchpoint address value.
 139     lldb::addr_t hit_addr; // Address at which last watchpoint trigger exception
 140                            // occurred.
 141     lldb::addr_t real_addr; // Address value that should cause target to stop.
 142     uint32_t control;       // Breakpoint/watchpoint control value.
 143     uint32_t refcount;      // Serves as enable/disable and reference counter.
 144   };
 145
 146   struct DREG m_hbr_regs[16]; // Arm native linux hardware breakpoints
 147   struct DREG m_hwp_regs[16]; // Arm native linux hardware watchpoints
 148
 149   uint32_t m_max_hwp_supported;
 150   uint32_t m_max_hbp_supported;
 151   bool m_refresh_hwdebug_info;
 152
 153   bool IsGPR(unsigned reg) const;
 154
 155   bool IsFPR(unsigned reg) const;
 156
 157   Status ReadHardwareDebugInfo();
 158
 159   Status WriteHardwareDebugRegs(int hwbType);
 160
 161   uint32_t CalculateFprOffset(const RegisterInfo *reg_info) const;
 162 };
 163
 164 } // namespace process_linux
 165 } // namespace lldb_private
 166
 167 #endif // #ifndef lldb_NativeRegisterContextLinux_arm64_h
 168
 169 #endif // defined (__arm64__) || defined (__aarch64__)