lldb/source/Plugins/Process/Utility/RegisterContextOpenBSD_x86_64.cpp

   1 //===-- RegisterContextOpenBSD_x86_64.cpp ---------------------------------===//
   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 #include "RegisterContextOpenBSD_x86_64.h"
  10 #include "RegisterContextPOSIX_x86.h"
  11 #include <vector>
  12
  13 using namespace lldb_private;
  14 using namespace lldb;
  15
  16 // /usr/include/machine/reg.h
  17 typedef struct _GPR {
  18   uint64_t rdi;
  19   uint64_t rsi;
  20   uint64_t rdx;
  21   uint64_t rcx;
  22   uint64_t r8;
  23   uint64_t r9;
  24   uint64_t r10;
  25   uint64_t r11;
  26   uint64_t r12;
  27   uint64_t r13;
  28   uint64_t r14;
  29   uint64_t r15;
  30   uint64_t rbp;
  31   uint64_t rbx;
  32   uint64_t rax;
  33   uint64_t rsp;
  34   uint64_t rip;
  35   uint64_t rflags;
  36   uint64_t cs;
  37   uint64_t ss;
  38   uint64_t ds;
  39   uint64_t es;
  40   uint64_t fs;
  41   uint64_t gs;
  42 } GPR;
  43
  44 struct DBG {
  45   uint64_t dr[16]; /* debug registers */
  46                    /* Index 0-3: debug address registers */
  47                    /* Index 4-5: reserved */
  48                    /* Index 6: debug status */
  49                    /* Index 7: debug control */
  50                    /* Index 8-15: reserved */
  51 };
  52
  53 struct UserArea {
  54   GPR gpr;
  55   FPR fpr;
  56   DBG dbg;
  57 };
  58
  59 #define DR_OFFSET(reg_index) (LLVM_EXTENSION offsetof(DBG, dr[reg_index]))
  60
  61 // Include RegisterInfos_x86_64 to declare our g_register_infos_x86_64
  62 // structure.
  63 #define DECLARE_REGISTER_INFOS_X86_64_STRUCT
  64 #include "RegisterInfos_x86_64.h"
  65 #undef DECLARE_REGISTER_INFOS_X86_64_STRUCT
  66
  67 static const RegisterInfo *
  68 PrivateGetRegisterInfoPtr(const lldb_private::ArchSpec &target_arch) {
  69   switch (target_arch.GetMachine()) {
  70   case llvm::Triple::x86_64:
  71     return g_register_infos_x86_64;
  72   default:
  73     assert(false && "Unhandled target architecture.");
  74     return nullptr;
  75   }
  76 }
  77
  78 static uint32_t
  79 PrivateGetRegisterCount(const lldb_private::ArchSpec &target_arch) {
  80   switch (target_arch.GetMachine()) {
  81   case llvm::Triple::x86_64:
  82     return static_cast<uint32_t>(sizeof(g_register_infos_x86_64) /
  83                                  sizeof(g_register_infos_x86_64[0]));
  84   default:
  85     assert(false && "Unhandled target architecture.");
  86     return 0;
  87   }
  88 }
  89
  90 RegisterContextOpenBSD_x86_64::RegisterContextOpenBSD_x86_64(
  91     const ArchSpec &target_arch)
  92     : lldb_private::RegisterInfoInterface(target_arch),
  93       m_register_info_p(PrivateGetRegisterInfoPtr(target_arch)),
  94       m_register_count(PrivateGetRegisterCount(target_arch)) {}
  95
  96 size_t RegisterContextOpenBSD_x86_64::GetGPRSize() const { return sizeof(GPR); }
  97
  98 const RegisterInfo *RegisterContextOpenBSD_x86_64::GetRegisterInfo() const {
  99   return m_register_info_p;
 100 }
 101
 102 uint32_t RegisterContextOpenBSD_x86_64::GetRegisterCount() const {
 103   return m_register_count;
 104 }