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

//===-- RegisterContextWindowsLive_x86.cpp ------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include "lldb/lldb-private-types.h"
#include "lldb/Core/Error.h"
#include "lldb/Core/RegisterValue.h"
#include "lldb/Host/windows/HostThreadWindows.h"
#include "lldb/Host/windows/windows.h"

#include "lldb-x86-register-enums.h"
#include "ProcessWindowsLog.h"
#include "RegisterContextWindowsLive_x86.h"
#include "TargetThreadWindows.h"

#include "llvm/ADT/STLExtras.h"

using namespace lldb;

namespace lldb_private
{

RegisterContextWindowsLive_x86::RegisterContextWindowsLive_x86(Thread &thread, uint32_t concrete_frame_idx)
    : RegisterContextWindows_x86(thread, concrete_frame_idx)
{
}

RegisterContextWindowsLive_x86::~RegisterContextWindowsLive_x86()
{
}


bool
RegisterContextWindowsLive_x86::WriteRegister(const RegisterInfo *reg_info, const RegisterValue &reg_value)
{
    // Since we cannot only write a single register value to the inferior, we need to make sure
    // our cached copy of the register values are fresh.  Otherwise when writing EAX, for example,
    // we may also overwrite some other register with a stale value.
    if (!CacheAllRegisterValues())
        return false;

    uint32_t reg = reg_info->kinds[eRegisterKindLLDB];
    switch (reg)
    {
        case lldb_eax_i386:
            WINLOG_IFALL(WINDOWS_LOG_REGISTERS, "Write value 0x%x to EAX", reg_value.GetAsUInt32());
            m_context.Eax = reg_value.GetAsUInt32();
            break;
        case lldb_ebx_i386:
            WINLOG_IFALL(WINDOWS_LOG_REGISTERS, "Write value 0x%x to EBX", reg_value.GetAsUInt32());
            m_context.Ebx = reg_value.GetAsUInt32();
            break;
        case lldb_ecx_i386:
            WINLOG_IFALL(WINDOWS_LOG_REGISTERS, "Write value 0x%x to ECX", reg_value.GetAsUInt32());
            m_context.Ecx = reg_value.GetAsUInt32();
            break;
        case lldb_edx_i386:
            WINLOG_IFALL(WINDOWS_LOG_REGISTERS, "Write value 0x%x to EDX", reg_value.GetAsUInt32());
            m_context.Edx = reg_value.GetAsUInt32();
            break;
        case lldb_edi_i386:
            WINLOG_IFALL(WINDOWS_LOG_REGISTERS, "Write value 0x%x to EDI", reg_value.GetAsUInt32());
            m_context.Edi = reg_value.GetAsUInt32();
            break;
        case lldb_esi_i386:
            WINLOG_IFALL(WINDOWS_LOG_REGISTERS, "Write value 0x%x to ESI", reg_value.GetAsUInt32());
            m_context.Esi = reg_value.GetAsUInt32();
            break;
        case lldb_ebp_i386:
            WINLOG_IFALL(WINDOWS_LOG_REGISTERS, "Write value 0x%x to EBP", reg_value.GetAsUInt32());
            m_context.Ebp = reg_value.GetAsUInt32();
            break;
        case lldb_esp_i386:
            WINLOG_IFALL(WINDOWS_LOG_REGISTERS, "Write value 0x%x to ESP", reg_value.GetAsUInt32());
            m_context.Esp = reg_value.GetAsUInt32();
            break;
        case lldb_eip_i386:
            WINLOG_IFALL(WINDOWS_LOG_REGISTERS, "Write value 0x%x to EIP", reg_value.GetAsUInt32());
            m_context.Eip = reg_value.GetAsUInt32();
            break;
        case lldb_eflags_i386:
            WINLOG_IFALL(WINDOWS_LOG_REGISTERS, "Write value 0x%x to EFLAGS", reg_value.GetAsUInt32());
            m_context.EFlags = reg_value.GetAsUInt32();
            break;
        default:
            WINWARN_IFALL(WINDOWS_LOG_REGISTERS, "Write value 0x%x to unknown register %u", reg_value.GetAsUInt32(),
                          reg);
    }

    // Physically update the registers in the target process.
    TargetThreadWindows &wthread = static_cast<TargetThreadWindows &>(m_thread);
    return ::SetThreadContext(wthread.GetHostThread().GetNativeThread().GetSystemHandle(), &m_context);
}

}  // namespace lldb_private