lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_ppc64le.h

   1 //===-- NativeRegisterContextLinux_ppc64le.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 // This implementation is related to the OpenPOWER ABI for Power Architecture
  10 // 64-bit ELF V2 ABI
  11
  12 #if defined(__powerpc64__)
  13
  14 #ifndef lldb_NativeRegisterContextLinux_ppc64le_h
  15 #define lldb_NativeRegisterContextLinux_ppc64le_h
  16
  17 #include "Plugins/Process/Linux/NativeRegisterContextLinux.h"
  18 #include "Plugins/Process/Utility/lldb-ppc64le-register-enums.h"
  19
  20 #define DECLARE_REGISTER_INFOS_PPC64LE_STRUCT
  21 #include "Plugins/Process/Utility/RegisterInfos_ppc64le.h"
  22 #undef DECLARE_REGISTER_INFOS_PPC64LE_STRUCT
  23
  24 namespace lldb_private {
  25 namespace process_linux {
  26
  27 class NativeProcessLinux;
  28
  29 class NativeRegisterContextLinux_ppc64le : public NativeRegisterContextLinux {
  30 public:
  31   NativeRegisterContextLinux_ppc64le(const ArchSpec &target_arch,
  32                                      NativeThreadProtocol &native_thread);
  33
  34   uint32_t GetRegisterSetCount() const override;
  35
  36   uint32_t GetUserRegisterCount() const override;
  37
  38   const RegisterSet *GetRegisterSet(uint32_t set_index) const override;
  39
  40   Status ReadRegister(const RegisterInfo *reg_info,
  41                       RegisterValue &reg_value) override;
  42
  43   Status WriteRegister(const RegisterInfo *reg_info,
  44                        const RegisterValue &reg_value) override;
  45
  46   Status ReadAllRegisterValues(lldb::WritableDataBufferSP &data_sp) override;
  47
  48   Status WriteAllRegisterValues(const lldb::DataBufferSP &data_sp) override;
  49
  50   // Hardware watchpoint management functions
  51
  52   uint32_t NumSupportedHardwareWatchpoints() override;
  53
  54   uint32_t SetHardwareWatchpoint(lldb::addr_t addr, size_t size,
  55                                  uint32_t watch_flags) override;
  56
  57   bool ClearHardwareWatchpoint(uint32_t hw_index) override;
  58
  59   Status GetWatchpointHitIndex(uint32_t &wp_index,
  60                                lldb::addr_t trap_addr) override;
  61
  62   lldb::addr_t GetWatchpointHitAddress(uint32_t wp_index) override;
  63
  64   lldb::addr_t GetWatchpointAddress(uint32_t wp_index) override;
  65
  66   uint32_t GetWatchpointSize(uint32_t wp_index);
  67
  68   bool WatchpointIsEnabled(uint32_t wp_index);
  69
  70 protected:
  71   bool IsVMX(unsigned reg);
  72
  73   bool IsVSX(unsigned reg);
  74
  75   Status ReadVMX();
  76
  77   Status WriteVMX();
  78
  79   Status ReadVSX();
  80
  81   Status WriteVSX();
  82
  83   void *GetGPRBuffer() override { return &m_gpr_ppc64le; }
  84
  85   void *GetFPRBuffer() override { return &m_fpr_ppc64le; }
  86
  87   size_t GetFPRSize() override { return sizeof(m_fpr_ppc64le); }
  88
  89 private:
  90   GPR m_gpr_ppc64le; // 64-bit general purpose registers.
  91   FPR m_fpr_ppc64le; // floating-point registers including extended register.
  92   VMX m_vmx_ppc64le; // VMX registers.
  93   VSX m_vsx_ppc64le; // Last lower bytes from first VSX registers.
  94
  95   bool IsGPR(unsigned reg) const;
  96
  97   bool IsFPR(unsigned reg) const;
  98
  99   bool IsVMX(unsigned reg) const;
 100
 101   bool IsVSX(unsigned reg) const;
 102
 103   uint32_t CalculateFprOffset(const RegisterInfo *reg_info) const;
 104
 105   uint32_t CalculateVmxOffset(const RegisterInfo *reg_info) const;
 106
 107   uint32_t CalculateVsxOffset(const RegisterInfo *reg_info) const;
 108
 109   Status ReadHardwareDebugInfo();
 110
 111   Status WriteHardwareDebugRegs();
 112
 113   // Debug register info for hardware watchpoints management.
 114   struct DREG {
 115     lldb::addr_t address;   // Breakpoint/watchpoint address value.
 116     lldb::addr_t hit_addr;  // Address at which last watchpoint trigger
 117                             // exception occurred.
 118     lldb::addr_t real_addr; // Address value that should cause target to stop.
 119     uint32_t control;       // Breakpoint/watchpoint control value.
 120     uint32_t refcount;      // Serves as enable/disable and reference counter.
 121     long slot;              // Saves the value returned from PTRACE_SETHWDEBUG.
 122     int mode;               // Defines if watchpoint is read/write/access.
 123   };
 124
 125   std::array<DREG, 16> m_hwp_regs;
 126
 127   // 16 is just a maximum value, query hardware for actual watchpoint count
 128   uint32_t m_max_hwp_supported = 16;
 129   uint32_t m_max_hbp_supported = 16;
 130   bool m_refresh_hwdebug_info = true;
 131 };
 132
 133 } // namespace process_linux
 134 } // namespace lldb_private
 135
 136 #endif // #ifndef lldb_NativeRegisterContextLinux_ppc64le_h
 137
 138 #endif // defined(__powerpc64__)