source/Plugins/Process/Windows/Live/x86/RegisterContextWindowsLive_x86.cpp

   1 //===-- RegisterContextWindowsLive_x86.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 "lldb/lldb-private-types.h"
  11 #include "lldb/Core/Error.h"
  12 #include "lldb/Core/RegisterValue.h"
  13 #include "lldb/Host/windows/HostThreadWindows.h"
  14 #include "lldb/Host/windows/windows.h"
  15
  16 #include "lldb-x86-register-enums.h"
  17 #include "ProcessWindowsLog.h"
  18 #include "RegisterContextWindowsLive_x86.h"
  19 #include "TargetThreadWindows.h"
  20
  21 #include "llvm/ADT/STLExtras.h"
  22
  23 using namespace lldb;
  24
  25 namespace lldb_private
  26 {
  27
  28 RegisterContextWindowsLive_x86::RegisterContextWindowsLive_x86(Thread &thread, uint32_t concrete_frame_idx)
  29     : RegisterContextWindows_x86(thread, concrete_frame_idx)
  30 {
  31 }
  32
  33 RegisterContextWindowsLive_x86::~RegisterContextWindowsLive_x86()
  34 {
  35 }
  36
  37
  38 bool
  39 RegisterContextWindowsLive_x86::WriteRegister(const RegisterInfo *reg_info, const RegisterValue &reg_value)
  40 {
  41     // Since we cannot only write a single register value to the inferior, we need to make sure
  42     // our cached copy of the register values are fresh.  Otherwise when writing EAX, for example,
  43     // we may also overwrite some other register with a stale value.
  44     if (!CacheAllRegisterValues())
  45         return false;
  46
  47     uint32_t reg = reg_info->kinds[eRegisterKindLLDB];
  48     switch (reg)
  49     {
  50         case lldb_eax_i386:
  51             WINLOG_IFALL(WINDOWS_LOG_REGISTERS, "Write value 0x%x to EAX", reg_value.GetAsUInt32());
  52             m_context.Eax = reg_value.GetAsUInt32();
  53             break;
  54         case lldb_ebx_i386:
  55             WINLOG_IFALL(WINDOWS_LOG_REGISTERS, "Write value 0x%x to EBX", reg_value.GetAsUInt32());
  56             m_context.Ebx = reg_value.GetAsUInt32();
  57             break;
  58         case lldb_ecx_i386:
  59             WINLOG_IFALL(WINDOWS_LOG_REGISTERS, "Write value 0x%x to ECX", reg_value.GetAsUInt32());
  60             m_context.Ecx = reg_value.GetAsUInt32();
  61             break;
  62         case lldb_edx_i386:
  63             WINLOG_IFALL(WINDOWS_LOG_REGISTERS, "Write value 0x%x to EDX", reg_value.GetAsUInt32());
  64             m_context.Edx = reg_value.GetAsUInt32();
  65             break;
  66         case lldb_edi_i386:
  67             WINLOG_IFALL(WINDOWS_LOG_REGISTERS, "Write value 0x%x to EDI", reg_value.GetAsUInt32());
  68             m_context.Edi = reg_value.GetAsUInt32();
  69             break;
  70         case lldb_esi_i386:
  71             WINLOG_IFALL(WINDOWS_LOG_REGISTERS, "Write value 0x%x to ESI", reg_value.GetAsUInt32());
  72             m_context.Esi = reg_value.GetAsUInt32();
  73             break;
  74         case lldb_ebp_i386:
  75             WINLOG_IFALL(WINDOWS_LOG_REGISTERS, "Write value 0x%x to EBP", reg_value.GetAsUInt32());
  76             m_context.Ebp = reg_value.GetAsUInt32();
  77             break;
  78         case lldb_esp_i386:
  79             WINLOG_IFALL(WINDOWS_LOG_REGISTERS, "Write value 0x%x to ESP", reg_value.GetAsUInt32());
  80             m_context.Esp = reg_value.GetAsUInt32();
  81             break;
  82         case lldb_eip_i386:
  83             WINLOG_IFALL(WINDOWS_LOG_REGISTERS, "Write value 0x%x to EIP", reg_value.GetAsUInt32());
  84             m_context.Eip = reg_value.GetAsUInt32();
  85             break;
  86         case lldb_eflags_i386:
  87             WINLOG_IFALL(WINDOWS_LOG_REGISTERS, "Write value 0x%x to EFLAGS", reg_value.GetAsUInt32());
  88             m_context.EFlags = reg_value.GetAsUInt32();
  89             break;
  90         default:
  91             WINWARN_IFALL(WINDOWS_LOG_REGISTERS, "Write value 0x%x to unknown register %u", reg_value.GetAsUInt32(),
  92                           reg);
  93     }
  94
  95     // Physically update the registers in the target process.
  96     TargetThreadWindows &wthread = static_cast<TargetThreadWindows &>(m_thread);
  97     return ::SetThreadContext(wthread.GetHostThread().GetNativeThread().GetSystemHandle(), &m_context);
  98 }
  99
 100 }  // namespace lldb_private