lldb/source/Plugins/Process/Utility/RegisterContextOpenBSD_i386.cpp

   1 //===-- RegisterContextOpenBSD_i386.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_i386.h"
  10 #include "RegisterContextPOSIX_x86.h"
  11
  12 using namespace lldb_private;
  13 using namespace lldb;
  14
  15 // /usr/include/machine/reg.h
  16 struct GPR {
  17   uint32_t eax;
  18   uint32_t ecx;
  19   uint32_t edx;
  20   uint32_t ebx;
  21   uint32_t esp;
  22   uint32_t ebp;
  23   uint32_t esi;
  24   uint32_t edi;
  25   uint32_t eip;
  26   uint32_t eflags;
  27   uint32_t cs;
  28   uint32_t ss;
  29   uint32_t ds;
  30   uint32_t es;
  31   uint32_t fs;
  32   uint32_t gs;
  33 };
  34
  35 struct dbreg {
  36   uint32_t dr[8]; /* debug registers */
  37                   /* Index 0-3: debug address registers */
  38                   /* Index 4-5: reserved */
  39                   /* Index 6: debug status */
  40                   /* Index 7: debug control */
  41 };
  42
  43 using FPR_i386 = FXSAVE;
  44
  45 struct UserArea {
  46   GPR gpr;
  47   FPR_i386 i387;
  48 };
  49
  50 #define DR_SIZE sizeof(uint32_t)
  51 #define DR_OFFSET(reg_index) (LLVM_EXTENSION offsetof(dbreg, dr[reg_index]))
  52
  53 // Include RegisterInfos_i386 to declare our g_register_infos_i386 structure.
  54 #define DECLARE_REGISTER_INFOS_I386_STRUCT
  55 #include "RegisterInfos_i386.h"
  56 #undef DECLARE_REGISTER_INFOS_I386_STRUCT
  57
  58 RegisterContextOpenBSD_i386::RegisterContextOpenBSD_i386(
  59     const ArchSpec &target_arch)
  60     : RegisterInfoInterface(target_arch) {}
  61
  62 size_t RegisterContextOpenBSD_i386::GetGPRSize() const { return sizeof(GPR); }
  63
  64 const RegisterInfo *RegisterContextOpenBSD_i386::GetRegisterInfo() const {
  65   switch (GetTargetArchitecture().GetMachine()) {
  66   case llvm::Triple::x86:
  67     return g_register_infos_i386;
  68   default:
  69     assert(false && "Unhandled target architecture.");
  70     return nullptr;
  71   }
  72 }
  73
  74 uint32_t RegisterContextOpenBSD_i386::GetRegisterCount() const {
  75   return static_cast<uint32_t>(sizeof(g_register_infos_i386) /
  76                                sizeof(g_register_infos_i386[0]));
  77 }