lldb/source/Plugins/Process/Utility/RegisterContextNetBSD_i386.cpp

   1 //===-- RegisterContextNetBSD_i386.cpp -------------------------*- C++ -*-===//
   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 "RegisterContextNetBSD_i386.h"
  10 #include "RegisterContextPOSIX_x86.h"
  11
  12 using namespace lldb_private;
  13 using namespace lldb;
  14
  15 // this needs to match 'struct reg'
  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 FPR_i386 {
  36   uint16_t fctrl;     // FPU Control Word (fcw)
  37   uint16_t fstat;     // FPU Status Word (fsw)
  38   uint16_t ftag;      // FPU Tag Word (ftw)
  39   uint16_t fop;       // Last Instruction Opcode (fop)
  40   union {
  41     struct {
  42       uint64_t fip; // Instruction Pointer
  43       uint64_t fdp; // Data Pointer
  44     } x86_64;
  45     struct {
  46       uint32_t fioff; // FPU IP Offset (fip)
  47       uint32_t fiseg; // FPU IP Selector (fcs)
  48       uint32_t fooff; // FPU Operand Pointer Offset (foo)
  49       uint32_t foseg; // FPU Operand Pointer Selector (fos)
  50     } i386_; // Added _ in the end to avoid error with gcc defining i386 in some
  51              // cases
  52   } ptr;
  53   uint32_t mxcsr;     // MXCSR Register State
  54   uint32_t mxcsrmask; // MXCSR Mask
  55   MMSReg stmm[8];     // 8*16 bytes for each FP-reg = 128 bytes
  56   XMMReg xmm[8];      // 8*16 bytes for each XMM-reg = 128 bytes
  57   uint32_t padding[56];
  58 };
  59
  60 struct UserArea {
  61   GPR gpr;
  62   FPR_i386 i387;
  63   uint32_t u_debugreg[8]; // Debug registers (DR0 - DR7).
  64   uint32_t tlsbase;
  65 };
  66
  67 #define DR_SIZE sizeof(((UserArea *)NULL)->u_debugreg[0])
  68 #define DR_OFFSET(reg_index)                                                   \
  69   (LLVM_EXTENSION offsetof(UserArea, u_debugreg[reg_index]))
  70
  71 // Include RegisterInfos_i386 to declare our g_register_infos_i386 structure.
  72 #define DECLARE_REGISTER_INFOS_I386_STRUCT
  73 #include "RegisterInfos_i386.h"
  74 #undef DECLARE_REGISTER_INFOS_I386_STRUCT
  75
  76 RegisterContextNetBSD_i386::RegisterContextNetBSD_i386(
  77     const ArchSpec &target_arch)
  78     : RegisterInfoInterface(target_arch) {}
  79
  80 size_t RegisterContextNetBSD_i386::GetGPRSize() const { return sizeof(GPR); }
  81
  82 const RegisterInfo *RegisterContextNetBSD_i386::GetRegisterInfo() const {
  83   switch (GetTargetArchitecture().GetMachine()) {
  84   case llvm::Triple::x86:
  85   case llvm::Triple::x86_64:
  86     return g_register_infos_i386;
  87   default:
  88     assert(false && "Unhandled target architecture.");
  89     return nullptr;
  90   }
  91 }
  92
  93 uint32_t RegisterContextNetBSD_i386::GetRegisterCount() const {
  94   return static_cast<uint32_t>(sizeof(g_register_infos_i386) /
  95                                sizeof(g_register_infos_i386[0]));
  96 }