contrib/llvm/tools/lldb/source/Plugins/Process/Utility/RegisterContextFreeBSD_x86_64.cpp

   1 //===-- RegisterContextFreeBSD_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 "RegisterContextFreeBSD_i386.h"
  13 #include "RegisterContextFreeBSD_x86_64.h"
  14
  15 using namespace lldb_private;
  16 using namespace lldb;
  17
  18 // http://svnweb.freebsd.org/base/head/sys/x86/include/reg.h
  19 typedef struct _GPR
  20 {
  21     uint64_t r15;
  22     uint64_t r14;
  23     uint64_t r13;
  24     uint64_t r12;
  25     uint64_t r11;
  26     uint64_t r10;
  27     uint64_t r9;
  28     uint64_t r8;
  29     uint64_t rdi;
  30     uint64_t rsi;
  31     uint64_t rbp;
  32     uint64_t rbx;
  33     uint64_t rdx;
  34     uint64_t rcx;
  35     uint64_t rax;
  36     uint32_t trapno;
  37     uint16_t fs;
  38     uint16_t gs;
  39     uint32_t err;
  40     uint16_t es;
  41     uint16_t ds;
  42     uint64_t rip;
  43     uint64_t cs;
  44     uint64_t rflags;
  45     uint64_t rsp;
  46     uint64_t ss;
  47 } GPR;
  48
  49 struct dbreg {
  50        uint64_t  dr[16];  /* debug registers */
  51                           /* Index 0-3: debug address registers */
  52                           /* Index 4-5: reserved */
  53                           /* Index 6: debug status */
  54                           /* Index 7: debug control */
  55                           /* Index 8-15: reserved */
  56 };
  57
  58 #define DR_SIZE sizeof(uint64_t)
  59 #define DR_OFFSET(reg_index) \
  60     (LLVM_EXTENSION offsetof(dbreg, dr[reg_index]))
  61
  62
  63 //---------------------------------------------------------------------------
  64 // Include RegisterInfos_x86_64 to declare our g_register_infos_x86_64 structure.
  65 //---------------------------------------------------------------------------
  66 #define DECLARE_REGISTER_INFOS_X86_64_STRUCT
  67 #include "RegisterInfos_x86_64.h"
  68 #undef DECLARE_REGISTER_INFOS_X86_64_STRUCT
  69
  70 static std::vector<lldb_private::RegisterInfo>&
  71 GetSharedRegisterInfoVector ()
  72 {
  73     static std::vector<lldb_private::RegisterInfo> register_infos;
  74     return register_infos;
  75 }
  76
  77 static const RegisterInfo *
  78 GetRegisterInfo_i386(const lldb_private::ArchSpec& arch)
  79 {
  80     static std::vector<lldb_private::RegisterInfo> g_register_infos (GetSharedRegisterInfoVector ());
  81
  82     // Allocate RegisterInfo only once
  83     if (g_register_infos.empty())
  84     {
  85         // Copy the register information from base class
  86         std::unique_ptr<RegisterContextFreeBSD_i386> reg_interface(new RegisterContextFreeBSD_i386 (arch));
  87         const RegisterInfo *base_info = reg_interface->GetRegisterInfo();
  88         g_register_infos.insert(g_register_infos.end(), &base_info[0], &base_info[k_num_registers_i386]);
  89
  90         //---------------------------------------------------------------------------
  91         // Include RegisterInfos_x86_64 to update the g_register_infos structure
  92         //  with x86_64 offsets.
  93         //---------------------------------------------------------------------------
  94         #define UPDATE_REGISTER_INFOS_I386_STRUCT_WITH_X86_64_OFFSETS
  95         #include "RegisterInfos_x86_64.h"
  96         #undef UPDATE_REGISTER_INFOS_I386_STRUCT_WITH_X86_64_OFFSETS
  97     }
  98
  99     return &g_register_infos[0];
 100 }
 101
 102 static const RegisterInfo *
 103 PrivateGetRegisterInfoPtr (const lldb_private::ArchSpec& target_arch)
 104 {
 105     switch (target_arch.GetMachine())
 106     {
 107         case llvm::Triple::x86:
 108             return GetRegisterInfo_i386 (target_arch);
 109         case llvm::Triple::x86_64:
 110             return g_register_infos_x86_64;
 111         default:
 112             assert(false && "Unhandled target architecture.");
 113             return nullptr;
 114     }
 115 }
 116
 117 static uint32_t
 118 PrivateGetRegisterCount (const lldb_private::ArchSpec& target_arch)
 119 {
 120     switch (target_arch.GetMachine())
 121     {
 122         case llvm::Triple::x86:
 123             // This vector should have already been filled.
 124             assert (!GetSharedRegisterInfoVector ().empty () && "i386 register info vector not filled.");
 125             return static_cast<uint32_t> (GetSharedRegisterInfoVector().size ());
 126         case llvm::Triple::x86_64:
 127             return static_cast<uint32_t> (sizeof (g_register_infos_x86_64) / sizeof (g_register_infos_x86_64 [0]));
 128         default:
 129             assert(false && "Unhandled target architecture.");
 130             return 0;
 131     }
 132 }
 133
 134 RegisterContextFreeBSD_x86_64::RegisterContextFreeBSD_x86_64(const ArchSpec &target_arch) :
 135     lldb_private::RegisterInfoInterface(target_arch),
 136     m_register_info_p (PrivateGetRegisterInfoPtr (target_arch)),
 137     m_register_count (PrivateGetRegisterCount (target_arch))
 138 {
 139 }
 140
 141 size_t
 142 RegisterContextFreeBSD_x86_64::GetGPRSize() const
 143 {
 144     return sizeof(GPR);
 145 }
 146
 147 const RegisterInfo *
 148 RegisterContextFreeBSD_x86_64::GetRegisterInfo() const
 149 {
 150     return m_register_info_p;
 151 }
 152
 153 uint32_t
 154 RegisterContextFreeBSD_x86_64::GetRegisterCount () const
 155 {
 156     return m_register_count;
 157 }
 158
 159