Question

我刚刚收到一个错误报告，该问题仅在程序“在64位计算机上运行”时才会出现。现在，Delphi不会生成64位代码，所以从理论上说这应该不重要，但显然它确实在这种情况下。我想我有一个解决方法，但它会破坏32位Windows上的东西，所以我需要一些方法来告诉：

如果我在x64或x86处理器上运行
如果我在Win32仿真下运行64位版本的Windows或在32位操作系统上运行本机Win32。

有谁知道如何从我的应用程序中获得这些答案？

Answer 1

Mason，您可以使用IsWow64Process（WOW64是x86模拟器，允许32位基于Windows的应用程序在64位Windows上无缝运行）

Uses Windows;

type
  WinIsWow64 = function( Handle: THandle; var Iret: BOOL ): Windows.BOOL; stdcall;


function IAmIn64Bits: Boolean;
var
  HandleTo64BitsProcess: WinIsWow64;
  Iret                 : Windows.BOOL;
begin
  Result := False;
  HandleTo64BitsProcess := GetProcAddress(GetModuleHandle('kernel32.dll'), 'IsWow64Process');
  if Assigned(HandleTo64BitsProcess) then
  begin
    if not HandleTo64BitsProcess(GetCurrentProcess, Iret) then
    Raise Exception.Create('Invalid handle');
    Result := Iret;
  end;
end;

再见。

Answer 2

我看到你的问题2（你在Win64上运行吗？）已经回答了。请记住，为了使您的代码能够面向未来，您需要考虑在Win64上运行的（假设的）64位Delphi应用程序中，IsWow64Process也将返回FALSE。

关于你的第一个问题 - 你是64位CPU - 你可以检查硬件上各自的CPUID功能标志，如下面的代码所示。


function Is64BitProcessor: boolean;
begin
  Result:=false;
  if CpuidAvailable = true then Result := Has64BitFeatureFlag;
end;

使用以下两个低级函数：


function CPUIDavailable:boolean;
asm // if EFLAGS bit 21 can be modified then CPUID is available
    pushfd              //Save Flags
          pushfd        //Copy flags to EAX
          pop eax
          mov ecx,eax   //Make another copy in ECX
          btc eax,21    //Complement bit 21
          push eax      //Copy EAX to flags
          popfd
          pushfd        //Copy flags back to EAX
          pop eax
          cmp eax,ecx   //Compare "old" flags value with potentially modified "new" value
          setne al      //Set return value
    popfd               //Restore flags
end;

function Has64BitFeatureFlag: boolean;
asm
  //IF CPUID.80000001h.EDX[bit29]=1 THEN it's a 64bit processor.
  //But we first need to check whether there's a function 80000001h.
  push ebx                  //Save EBX as CPUID will modify EBX
  push esi                  //Save ESI as we'll use ESI internally

xor eax,eax             //Setting EAX = input param for CPUID to 0
cpuid                   //Call CPUID.0
                        //Returns -> EAX = max "standard" EAX input value
mov esi, eax            //Saving MaxStdInput Value

mov eax,80000000h       //Setting EAX = input param for CPUID to $80000000
cpuid                   //Call CPUID.80000000h
                        //Returns -> EAX = max "extended" EAX input value
                        //If 80000000h call is unsupported (no 64-bit processor),
                        //cpuid should return the same as in call 0
cmp eax, esi
je @No64BitProcessor    //IF EAX{MaxExtInput} = ESI{MaxStdInput} THEN goto No64BitProcessor;

cmp eax, 80000001h
jb @No64BitProcessor    //IF EAX{MaxExtInput} < $80000001 THEN goto No64BitProcessor;

mov eax,80000001h       //Call $80000001 is supported, setting EAX:=$80000001
cpuid                   //Call CPUID.80000001h
                        //Checking "AMD long mode"/"Intel EM64T" feature bit (i.e., 64bit processor)
bt edx, 29              //by checking CPUID.80000001h.EDX[bit29]
setc al                 //IF Bit29=1 then AL{Result}:=1{true; it's a 64-bit processor}
jmp @Exit               //Exit {Note that Delphi may actually recode this as POP ESI; POP EBX; RET}


@No64BitProcessor:
    xor eax, eax            //Result{AL/EAX}:=0{false; it's a 32-bit processor};
 @Exit:
  pop esi                   //Restore ESI
  pop ebx                   //Restore EBX
end;

EDIT1：关于xor eax,eax //Setting EAX = input param for CPUID to 0 cpuid //Call CPUID.0 //Returns -> EAX = max "standard" EAX input value mov esi, eax //Saving MaxStdInput Value mov eax,80000000h //Setting EAX = input param for CPUID to $80000000 cpuid //Call CPUID.80000000h //Returns -> EAX = max "extended" EAX input value //If 80000000h call is unsupported (no 64-bit processor), //cpuid should return the same as in call 0 cmp eax, esi je @No64BitProcessor //IF EAX{MaxExtInput} = ESI{MaxStdInput} THEN goto No64BitProcessor; cmp eax, 80000001h jb @No64BitProcessor //IF EAX{MaxExtInput} < $80000001 THEN goto No64BitProcessor; mov eax,80000001h //Call $80000001 is supported, setting EAX:=$80000001 cpuid //Call CPUID.80000001h //Checking "AMD long mode"/"Intel EM64T" feature bit (i.e., 64bit processor) bt edx, 29 //by checking CPUID.80000001h.EDX[bit29] setc al //IF Bit29=1 then AL{Result}:=1{true; it's a 64-bit processor} jmp @Exit //Exit {Note that Delphi may actually recode this as POP ESI; POP EBX; RET}的注释：这当然是假设一个＆gt; = 32位x86处理器（80386或更高版本），但Delphi Win32代码无论如何都不会在早期的机器上运行。 CPUID指令是在80486后期处理器中引入的。

Answer 3

您可以检查是否存在，然后拨打IsWow64Process。链接的MSDN页面显示了所需的代码。

Answer 4

MSDN页面说：

与不支持此操作系统的操作系统兼容函数，调用GetProcAddress来检测IsWow64Process是否为在Kernel32.dll中实现。如果GetProcAddress成功，那么它是安全的叫这个功能。否则，WOW64不存在。请注意这一点技术不是检测操作系统是否可靠的方法是64位版本的Windows，因为当前的Kernel32.dll 32位Windows的版本也包含此功能。

这意味着：这是一个新功能，您必须小心静态链接到它。

Answer 5

在第一个功能的开头，您需要添加

if SizeOf(Pointer)=8 then
  Exit(True); // Current app is 64 bit

Answer 6

如果sizeof(IntPtr) == 8 您是64位Windows上的64位应用程序（编辑：仅适用于Delphi Prism）

如果IsWow64Process成功并返回true ，那么您就是32位应用程序 64位Windows

其他您使用的是32位Windows

如何判断我是否在x64上运行？

6 个答案: