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     {
25     public:
26         NativeRegisterContextLinux_arm64 (const ArchSpec& target_arch,
27                                           NativeThreadProtocol &native_thread,
28                                           uint32_t concrete_frame_idx);
29 
30         uint32_t
31         GetRegisterSetCount () const override;
32 
33         uint32_t
34         GetUserRegisterCount() const override;
35 
36         const RegisterSet *
37         GetRegisterSet (uint32_t set_index) const override;
38 
39         Error
40         ReadRegister (const RegisterInfo *reg_info, RegisterValue &reg_value) override;
41 
42         Error
43         WriteRegister (const RegisterInfo *reg_info, const RegisterValue &reg_value) override;
44 
45         Error
46         ReadAllRegisterValues (lldb::DataBufferSP &data_sp) override;
47 
48         Error
49         WriteAllRegisterValues (const lldb::DataBufferSP &data_sp) override;
50 
51         //------------------------------------------------------------------
52         // Hardware breakpoints/watchpoint mangement functions
53         //------------------------------------------------------------------
54 
55         uint32_t
56         SetHardwareBreakpoint (lldb::addr_t addr, size_t size) override;
57 
58         bool
59         ClearHardwareBreakpoint (uint32_t hw_idx) override;
60 
61         uint32_t
62         NumSupportedHardwareWatchpoints () override;
63 
64         uint32_t
65         SetHardwareWatchpoint (lldb::addr_t addr, size_t size, uint32_t watch_flags) override;
66 
67         bool
68         ClearHardwareWatchpoint (uint32_t hw_index) override;
69 
70         Error
71         ClearAllHardwareWatchpoints () override;
72 
73         Error
74         GetWatchpointHitIndex(uint32_t &wp_index, lldb::addr_t trap_addr) override;
75 
76         lldb::addr_t
77         GetWatchpointAddress (uint32_t wp_index) override;
78 
79         uint32_t
80         GetWatchpointSize(uint32_t wp_index);
81 
82         bool
83         WatchpointIsEnabled(uint32_t wp_index);
84 
85     protected:
86         Error
87         DoReadRegisterValue(uint32_t offset,
88                             const char* reg_name,
89                             uint32_t size,
90                             RegisterValue &value) override;
91 
92         Error
93         DoWriteRegisterValue(uint32_t offset,
94                              const char* reg_name,
95                              const RegisterValue &value) override;
96 
97         Error
98         DoReadGPR(void *buf, size_t buf_size) override;
99 
100         Error
101         DoWriteGPR(void *buf, size_t buf_size) override;
102 
103         Error
104         DoReadFPR(void *buf, size_t buf_size) override;
105 
106         Error
107         DoWriteFPR(void *buf, size_t buf_size) override;
108 
109         void*
110         GetGPRBuffer() override { return &m_gpr_arm64; }
111 
112         void*
113         GetFPRBuffer() override { return &m_fpr; }
114 
115         size_t
116         GetFPRSize() override { return sizeof(m_fpr); }
117 
118     private:
119         struct RegInfo
120         {
121             uint32_t num_registers;
122             uint32_t num_gpr_registers;
123             uint32_t num_fpr_registers;
124 
125             uint32_t last_gpr;
126             uint32_t first_fpr;
127             uint32_t last_fpr;
128 
129             uint32_t first_fpr_v;
130             uint32_t last_fpr_v;
131 
132             uint32_t gpr_flags;
133         };
134 
135         // based on RegisterContextDarwin_arm64.h
136         struct VReg
137         {
138             uint8_t bytes[16];
139         };
140 
141         // based on RegisterContextDarwin_arm64.h
142         struct FPU
143         {
144             VReg        v[32];
145             uint32_t    fpsr;
146             uint32_t    fpcr;
147         };
148 
149         uint64_t m_gpr_arm64[k_num_gpr_registers_arm64]; // 64-bit general purpose registers.
150         RegInfo  m_reg_info;
151         FPU m_fpr; // floating-point registers including extended register sets.
152 
153         // Debug register info for hardware breakpoints and watchpoints management.
154         struct DREG
155         {
156             lldb::addr_t address;  // Breakpoint/watchpoint address value.
157             uint32_t control;  // Breakpoint/watchpoint control value.
158             uint32_t refcount;  // Serves as enable/disable and refernce counter.
159         };
160 
161         struct DREG m_hbr_regs[16];  // Arm native linux hardware breakpoints
162         struct DREG m_hwp_regs[16];  // Arm native linux hardware watchpoints
163 
164         uint32_t m_max_hwp_supported;
165         uint32_t m_max_hbp_supported;
166         bool m_refresh_hwdebug_info;
167 
168         bool
169         IsGPR(unsigned reg) const;
170 
171         bool
172         IsFPR(unsigned reg) const;
173 
174         Error
175         ReadHardwareDebugInfo(unsigned int &watch_count , unsigned int &break_count);
176 
177         Error
178         WriteHardwareDebugRegs(lldb::addr_t *addr_buf, uint32_t *cntrl_buf, int type, int count);
179     };
180 
181 } // namespace process_linux
182 } // namespace lldb_private
183 
184 #endif // #ifndef lldb_NativeRegisterContextLinux_arm64_h
185 
186 #endif // defined (__arm64__) || defined (__aarch64__)
187