本文整理汇总了C++中AsmJitHelper::emit方法的典型用法代码示例。如果您正苦于以下问题：C++ AsmJitHelper::emit方法的具体用法？C++ AsmJitHelper::emit怎么用？C++ AsmJitHelper::emit使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类AsmJitHelper的用法示例。
在下文中一共展示了AsmJitHelper::emit方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: CreateVEH
/// <summary>
/// Inject VEH wrapper into process
/// Used to enable execution of SEH handlers out of image
/// </summary>
/// <param name="pTargetBase">Target image base address</param>
/// <param name="imageSize">Size of the image</param>
/// <returns>Error code</returns>
NTSTATUS MExcept::CreateVEH( size_t pTargetBase, size_t imageSize )
{
AsmJitHelper ea;
uint64_t result = 0;
// VEH codecave
_pVEHCode = _proc.memory().Allocate( 0x2000 );
_pVEHCode.Release();
if (!_pVEHCode.valid())
return LastNtStatus();
#ifdef USE64
asmjit::Label lExit = ea->newLabel();
//
// Assembly code for VectoredHandler64
// 0x10 - EXCEPTION_RECORD.ExceptionAddress
// 0x20 - EXCEPTION_RECORD.ExceptionInformation[0]
// 0x30 - EXCEPTION_RECORD.ExceptionInformation[2]
// 0x38 - EXCEPTION_RECORD.ExceptionInformation[3]
//
ea->mov( asmjit::host::rax, qword_ptr( asmjit::host::rcx ) );
ea->cmp( asmjit::host::dword_ptr( asmjit::host::rax ), EH_EXCEPTION_NUMBER );
ea->jne( lExit );
ea->mov( asmjit::host::rdx, pTargetBase );
ea->mov( asmjit::host::r8, asmjit::host::qword_ptr( asmjit::host::rax, 0x30 ) );
ea->cmp( asmjit::host::r8, asmjit::host::rdx );;
ea->jl( lExit );
ea->add( asmjit::host::rdx, imageSize );
ea->cmp( asmjit::host::r8, asmjit::host::rdx );;
ea->jg( lExit );
ea->cmp( asmjit::host::qword_ptr( asmjit::host::rax, 0x20 ), EH_PURE_MAGIC_NUMBER1 );;
ea->jne( lExit );
ea->cmp( asmjit::host::qword_ptr( asmjit::host::rax, 0x38 ), 0 );
ea->jne( lExit );
ea->mov( asmjit::host::qword_ptr( asmjit::host::rax, 0x20 ), EH_MAGIC_NUMBER1 );
ea->mov( asmjit::host::rcx, qword_ptr( asmjit::host::rcx ) );
ea->mov( asmjit::host::rdx, pTargetBase );
ea->mov( asmjit::host::qword_ptr( asmjit::host::rax, 0x38 ), asmjit::host::rdx );
ea->bind( lExit );
ea->xor_( asmjit::host::rax, asmjit::host::rax );
ea->ret();
ea->emit( 0xCC );
ea->emit( 0xCC );
ea->emit( 0xCC );
if (_pVEHCode.Write( 0, ea->getCodeSize(), ea->make() ) != STATUS_SUCCESS)
{
_pVEHCode.Free();
return LastNtStatus();
}
#else
UNREFERENCED_PARAMETER( pTargetBase );
UNREFERENCED_PARAMETER( imageSize );
// Resolve compiler incremental table address if any
void *pFunc = ResolveJmp( &VectoredHandler );
size_t fnSize = static_cast<size_t>(SizeOfProc( pFunc ));
size_t dataOfs = 0, code_ofs = 0;
// Find and replace magic values
for (uint8_t *pData = reinterpret_cast<uint8_t*>(pFunc);
pData < reinterpret_cast<uint8_t*>(pFunc) + fnSize - 4;
pData++)
{
// LdrpInvertedFunctionTable
if(*(size_t*)pData == 0xDEADDA7A)
{
dataOfs = pData - reinterpret_cast<uint8_t*>(pFunc);
continue;
}
// DecodeSystemPointer address
if(*(size_t*)pData == 0xDEADC0DE)
{
code_ofs = pData - reinterpret_cast<uint8_t*>(pFunc);
break;
}
}
// Write handler data into target process
if (_pVEHCode.Write( 0, fnSize, pFunc ) != STATUS_SUCCESS ||
_pVEHCode.Write( dataOfs, _proc.nativeLdr().LdrpInvertedFunctionTable() ) != STATUS_SUCCESS ||
_pVEHCode.Write( code_ofs, &DecodeSystemPointer ) != STATUS_SUCCESS)
{
_pVEHCode.Free();
return LastNtStatus();
}
#endif
ea.GenPrologue();
//.........这里部分代码省略.........