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
24namespace lldb_private {
25namespace process_linux {
26
27class NativeProcessLinux;
28
29class NativeRegisterContextLinux_ppc64le : public NativeRegisterContextLinux {
30public:
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
70protected:
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
89private:
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__)
139