lldb/source/Plugins/Process/Utility/RegisterContextWindows_i386.cpp

   1 //===-- RegisterContextWindows_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 "RegisterContextWindows_i386.h"
  10 #include "RegisterContext_x86.h"
  11 #include "lldb-x86-register-enums.h"
  12
  13 using namespace lldb_private;
  14 using namespace lldb;
  15
  16 namespace {
  17 // Declare our g_register_infos structure.
  18 typedef struct _GPR {
  19   uint32_t eax;
  20   uint32_t ebx;
  21   uint32_t ecx;
  22   uint32_t edx;
  23   uint32_t edi;
  24   uint32_t esi;
  25   uint32_t ebp;
  26   uint32_t esp;
  27   uint32_t eip;
  28   uint32_t eflags;
  29   uint32_t cs;
  30   uint32_t fs;
  31   uint32_t gs;
  32   uint32_t ss;
  33   uint32_t ds;
  34   uint32_t es;
  35 } GPR;
  36
  37 #define GPR_OFFSET(regname) (LLVM_EXTENSION offsetof(GPR, regname))
  38
  39 #define DEFINE_GPR(reg, alt, kind1, kind2, kind3, kind4)                       \
  40   {                                                                            \
  41 #reg, alt, sizeof(((GPR *)nullptr)->reg), GPR_OFFSET(reg), eEncodingUint,  \
  42         eFormatHex,                                                            \
  43         {kind1, kind2, kind3, kind4, lldb_##reg##_i386 }, nullptr, nullptr,    \
  44         nullptr,                                                               \
  45   }
  46
  47 // clang-format off
  48 static RegisterInfo g_register_infos_i386[] = {
  49 // General purpose registers     EH_Frame              DWARF                 Generic                     Process Plugin
  50 //  ===========================  ==================    ================      =========================   ====================
  51     DEFINE_GPR(eax,   nullptr,   ehframe_eax_i386,     dwarf_eax_i386,       LLDB_INVALID_REGNUM,        LLDB_INVALID_REGNUM),
  52     DEFINE_GPR(ebx,   nullptr,   ehframe_ebx_i386,     dwarf_ebx_i386,       LLDB_INVALID_REGNUM,        LLDB_INVALID_REGNUM),
  53     DEFINE_GPR(ecx,   nullptr,   ehframe_ecx_i386,     dwarf_ecx_i386,       LLDB_INVALID_REGNUM,        LLDB_INVALID_REGNUM),
  54     DEFINE_GPR(edx,   nullptr,   ehframe_edx_i386,     dwarf_edx_i386,       LLDB_INVALID_REGNUM,        LLDB_INVALID_REGNUM),
  55     DEFINE_GPR(edi,   nullptr,   ehframe_edi_i386,     dwarf_edi_i386,       LLDB_INVALID_REGNUM,        LLDB_INVALID_REGNUM),
  56     DEFINE_GPR(esi,   nullptr,   ehframe_esi_i386,     dwarf_esi_i386,       LLDB_INVALID_REGNUM,        LLDB_INVALID_REGNUM),
  57     DEFINE_GPR(ebp,   "fp",      ehframe_ebp_i386,     dwarf_ebp_i386,       LLDB_REGNUM_GENERIC_FP,     LLDB_INVALID_REGNUM),
  58     DEFINE_GPR(esp,   "sp",      ehframe_esp_i386,     dwarf_esp_i386,       LLDB_REGNUM_GENERIC_SP,     LLDB_INVALID_REGNUM),
  59     DEFINE_GPR(eip,   "pc",      ehframe_eip_i386,     dwarf_eip_i386,       LLDB_REGNUM_GENERIC_PC,     LLDB_INVALID_REGNUM),
  60     DEFINE_GPR(eflags, "flags",  ehframe_eflags_i386,  dwarf_eflags_i386,    LLDB_REGNUM_GENERIC_FLAGS,  LLDB_INVALID_REGNUM),
  61     DEFINE_GPR(cs,     nullptr,  LLDB_INVALID_REGNUM,  dwarf_cs_i386,        LLDB_INVALID_REGNUM,        LLDB_INVALID_REGNUM),
  62     DEFINE_GPR(fs,     nullptr,  LLDB_INVALID_REGNUM,  dwarf_fs_i386,        LLDB_INVALID_REGNUM,        LLDB_INVALID_REGNUM),
  63     DEFINE_GPR(gs,     nullptr,  LLDB_INVALID_REGNUM,  dwarf_gs_i386,        LLDB_INVALID_REGNUM,        LLDB_INVALID_REGNUM),
  64     DEFINE_GPR(ss,     nullptr,  LLDB_INVALID_REGNUM,  dwarf_ss_i386,        LLDB_INVALID_REGNUM,        LLDB_INVALID_REGNUM),
  65     DEFINE_GPR(ds,     nullptr,  LLDB_INVALID_REGNUM,  dwarf_ds_i386,        LLDB_INVALID_REGNUM,        LLDB_INVALID_REGNUM),
  66     DEFINE_GPR(es,     nullptr,  LLDB_INVALID_REGNUM,  dwarf_es_i386,        LLDB_INVALID_REGNUM,        LLDB_INVALID_REGNUM),
  67 };
  68 // clang-format on
  69 } // namespace
  70
  71 RegisterContextWindows_i386::RegisterContextWindows_i386(
  72     const ArchSpec &target_arch)
  73     : lldb_private::RegisterInfoInterface(target_arch) {
  74   assert(target_arch.GetMachine() == llvm::Triple::x86);
  75 }
  76
  77 const RegisterInfo *RegisterContextWindows_i386::GetRegisterInfo() const {
  78   return g_register_infos_i386;
  79 }
  80
  81 uint32_t RegisterContextWindows_i386::GetRegisterCount() const {
  82   return std::size(g_register_infos_i386);
  83 }
  84
  85 uint32_t RegisterContextWindows_i386::GetUserRegisterCount() const {
  86   return std::size(g_register_infos_i386);
  87 }
  88
  89 size_t RegisterContextWindows_i386::GetGPRSize() const { return sizeof(GPR); }