contrib/llvm/tools/lldb/source/Plugins/Process/Utility/RegisterContextOpenBSD_x86_64.cpp

   1 //===-- RegisterContextOpenBSD_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 "RegisterContextOpenBSD_x86_64.h"
  11 #include "RegisterContextPOSIX_x86.h"
  12 #include <vector>
  13
  14 using namespace lldb_private;
  15 using namespace lldb;
  16
  17 // /usr/include/machine/reg.h
  18 typedef struct _GPR {
  19   uint64_t rdi;
  20   uint64_t rsi;
  21   uint64_t rdx;
  22   uint64_t rcx;
  23   uint64_t r8;
  24   uint64_t r9;
  25   uint64_t r10;
  26   uint64_t r11;
  27   uint64_t r12;
  28   uint64_t r13;
  29   uint64_t r14;
  30   uint64_t r15;
  31   uint64_t rbp;
  32   uint64_t rbx;
  33   uint64_t rax;
  34   uint64_t rsp;
  35   uint64_t rip;
  36   uint64_t rflags;
  37   uint64_t cs;
  38   uint64_t ss;
  39   uint64_t ds;
  40   uint64_t es;
  41   uint64_t fs;
  42   uint64_t gs;
  43 } GPR;
  44
  45 struct DBG {
  46   uint64_t dr[16]; /* debug registers */
  47                    /* Index 0-3: debug address registers */
  48                    /* Index 4-5: reserved */
  49                    /* Index 6: debug status */
  50                    /* Index 7: debug control */
  51                    /* Index 8-15: reserved */
  52 };
  53
  54 struct UserArea {
  55   GPR gpr;
  56   FPR fpr;
  57   DBG dbg;
  58 };
  59
  60 #define DR_OFFSET(reg_index) (LLVM_EXTENSION offsetof(DBG, dr[reg_index]))
  61
  62 //---------------------------------------------------------------------------
  63 // Include RegisterInfos_x86_64 to declare our g_register_infos_x86_64
  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 const RegisterInfo *
  71 PrivateGetRegisterInfoPtr(const lldb_private::ArchSpec &target_arch) {
  72   switch (target_arch.GetMachine()) {
  73   case llvm::Triple::x86_64:
  74     return g_register_infos_x86_64;
  75   default:
  76     assert(false && "Unhandled target architecture.");
  77     return nullptr;
  78   }
  79 }
  80
  81 static uint32_t
  82 PrivateGetRegisterCount(const lldb_private::ArchSpec &target_arch) {
  83   switch (target_arch.GetMachine()) {
  84   case llvm::Triple::x86_64:
  85     return static_cast<uint32_t>(sizeof(g_register_infos_x86_64) /
  86                                  sizeof(g_register_infos_x86_64[0]));
  87   default:
  88     assert(false && "Unhandled target architecture.");
  89     return 0;
  90   }
  91 }
  92
  93 RegisterContextOpenBSD_x86_64::RegisterContextOpenBSD_x86_64(
  94     const ArchSpec &target_arch)
  95     : lldb_private::RegisterInfoInterface(target_arch),
  96       m_register_info_p(PrivateGetRegisterInfoPtr(target_arch)),
  97       m_register_count(PrivateGetRegisterCount(target_arch)) {}
  98
  99 size_t RegisterContextOpenBSD_x86_64::GetGPRSize() const { return sizeof(GPR); }
 100
 101 const RegisterInfo *RegisterContextOpenBSD_x86_64::GetRegisterInfo() const {
 102   return m_register_info_p;
 103 }
 104
 105 uint32_t RegisterContextOpenBSD_x86_64::GetRegisterCount() const {
 106   return m_register_count;
 107 }