1 //===-- RegisterContextLinux_x86_64.cpp ------------------------*- 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 #include <vector>
11 #include "RegisterContextPOSIX_x86.h"
12 #include "RegisterContextLinux_i386.h"
13 #include "RegisterContextLinux_x86_64.h"
14 
15 using namespace lldb_private;
16 using namespace lldb;
17 
18 typedef struct _GPR
19 {
20     uint64_t r15;
21     uint64_t r14;
22     uint64_t r13;
23     uint64_t r12;
24     uint64_t rbp;
25     uint64_t rbx;
26     uint64_t r11;
27     uint64_t r10;
28     uint64_t r9;
29     uint64_t r8;
30     uint64_t rax;
31     uint64_t rcx;
32     uint64_t rdx;
33     uint64_t rsi;
34     uint64_t rdi;
35     uint64_t orig_ax;
36     uint64_t rip;
37     uint64_t cs;
38     uint64_t rflags;
39     uint64_t rsp;
40     uint64_t ss;
41     uint64_t fs_base;
42     uint64_t gs_base;
43     uint64_t ds;
44     uint64_t es;
45     uint64_t fs;
46     uint64_t gs;
47 } GPR;
48 
49 struct UserArea
50 {
51     GPR      gpr;           // General purpose registers.
52     int32_t  fpvalid;       // True if FPU is being used.
53     int32_t  pad0;
54     FXSAVE   i387;          // General purpose floating point registers (see FPR for extended register sets).
55     uint64_t tsize;         // Text segment size.
56     uint64_t dsize;         // Data segment size.
57     uint64_t ssize;         // Stack segment size.
58     uint64_t start_code;    // VM address of text.
59     uint64_t start_stack;   // VM address of stack bottom (top in rsp).
60     int64_t  signal;        // Signal causing core dump.
61     int32_t  reserved;      // Unused.
62     int32_t  pad1;
63     uint64_t ar0;           // Location of GPR's.
64     FXSAVE*  fpstate;       // Location of FPR's.
65     uint64_t magic;         // Identifier for core dumps.
66     char     u_comm[32];    // Command causing core dump.
67     uint64_t u_debugreg[8]; // Debug registers (DR0 - DR7).
68     uint64_t error_code;    // CPU error code.
69     uint64_t fault_address; // Control register CR3.
70 };
71 
72 #define DR_SIZE sizeof(((UserArea*)NULL)->u_debugreg[0])
73 #define DR_OFFSET(reg_index) \
74     (LLVM_EXTENSION offsetof(UserArea, u_debugreg[reg_index]))
75 
76 //---------------------------------------------------------------------------
77 // Include RegisterInfos_x86_64 to declare our g_register_infos_x86_64 structure.
78 //---------------------------------------------------------------------------
79 #define DECLARE_REGISTER_INFOS_X86_64_STRUCT
80 #include "RegisterInfos_x86_64.h"
81 #undef DECLARE_REGISTER_INFOS_X86_64_STRUCT
82 
83 static const RegisterInfo *
84 GetRegisterInfo_i386(const lldb_private::ArchSpec &arch)
85 {
86     static std::vector<lldb_private::RegisterInfo> g_register_infos;
87 
88     // Allocate RegisterInfo only once
89     if (g_register_infos.empty())
90     {
91         // Copy the register information from base class
92         std::unique_ptr<RegisterContextLinux_i386> reg_interface(new RegisterContextLinux_i386 (arch));
93         const RegisterInfo *base_info = reg_interface->GetRegisterInfo();
94         g_register_infos.insert(g_register_infos.end(), &base_info[0], &base_info[k_num_registers_i386]);
95 
96         //---------------------------------------------------------------------------
97         // Include RegisterInfos_x86_64 to update the g_register_infos structure
98         //  with x86_64 offsets.
99         //---------------------------------------------------------------------------
100         #define UPDATE_REGISTER_INFOS_I386_STRUCT_WITH_X86_64_OFFSETS
101         #include "RegisterInfos_x86_64.h"
102         #undef UPDATE_REGISTER_INFOS_I386_STRUCT_WITH_X86_64_OFFSETS
103     }
104 
105     return &g_register_infos[0];
106 }
107 
108 RegisterContextLinux_x86_64::RegisterContextLinux_x86_64(const ArchSpec &target_arch) :
109     lldb_private::RegisterInfoInterface(target_arch)
110 {
111 }
112 
113 RegisterContextLinux_x86_64::~RegisterContextLinux_x86_64()
114 {
115 }
116 
117 size_t
118 RegisterContextLinux_x86_64::GetGPRSize()
119 {
120     return sizeof(GPR);
121 }
122 
123 const RegisterInfo *
124 RegisterContextLinux_x86_64::GetRegisterInfo()
125 {
126     switch (m_target_arch.GetMachine())
127     {
128         case llvm::Triple::x86:
129             return GetRegisterInfo_i386 (m_target_arch);
130         case llvm::Triple::x86_64:
131             return g_register_infos_x86_64;
132         default:
133             assert(false && "Unhandled target architecture.");
134             return NULL;
135     }
136 }
137 
138