本文告诉大家如何在 C# 里面使用汇编代码
请看
C#嵌入x86汇编——一个GPIO接口的实现 - 云+社区 - 腾讯云
C# inline-asm / 嵌入x86汇编 - 苏璃 - CSDN博客
通过这个方法在 dotnet core 获取 CPU 信息
[StructLayout(LayoutKind.Sequential)]
internal ref struct CpuIdInfo
{
public uint Eax;
public uint Ebx;
public uint Ecx;
public uint Edx;
public static void AppendAsString(StringBuilder builder,uint value)
{
var val = value;
while (val != 0)
{
builder.Append((char) (val & 0xFF));
val >>= 8;
}
}
public string GetString()
{
StringBuilder ret = new StringBuilder(16);
AppendAsString(ret,Ebx);
AppendAsString(ret,Edx);
AppendAsString(ret,Ecx);
return ret.ToString();
}
}
internal sealed class CpuIdAssemblyCode
: IDisposable
{
[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
private delegate void CpuIDDelegate(int level, ref CpuIdInfo cpuId);
private IntPtr _codePointer;
private uint _size;
private CpuIDDelegate _delegate;
public CpuIdAssemblyCode()
{
byte[] codeBytes = (IntPtr.Size == 4) ? x86CodeBytes : x64CodeBytes;
_size = (uint) codeBytes.Length;
_codePointer = NativeMethods.Kernel32.VirtualAlloc(
IntPtr.Zero,
new UIntPtr(_size),
AllocationType.COMMIT | AllocationType.RESERVE,
MemoryProtection.EXECUTE_READWRITE
);
Marshal.Copy(codeBytes, 0, _codePointer, codeBytes.Length);
#if NET40
_delegate = (CpuIDDelegate) Marshal.GetDelegateForFunctionPointer(_codePointer, typeof(CpuIDDelegate));
#else
_delegate = Marshal.GetDelegateForFunctionPointer<CpuIDDelegate>(_codePointer);
#endif
}
~CpuIdAssemblyCode()
{
Dispose(false);
}
public void Call(int level, ref CpuIdInfo cpuInfo)
{
_delegate(level, ref cpuInfo);
}
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
private void Dispose(bool disposing)
{
NativeMethods.Kernel32.VirtualFree(_codePointer, _size, 0x8000);
}
private readonly static byte[] x86CodeBytes =
{
0x55,
0x8B, 0xEC,
0x53,
0x57,
0x8B, 0x45, 0x08,
0x0F, 0xA2,
0x8B, 0x7D, 0x0C,
0x89, 0x07,
0x89, 0x5F, 0x04,
0x89, 0x4F, 0x08,
0x89, 0x57, 0x0C,
0x5F,
0x5B,
0x8B, 0xE5,
0x5D,
0xc3
};
private readonly static byte[] x64CodeBytes =
{
0x53,
0x49, 0x89, 0xd0,
0x89, 0xc8,
0x0F, 0xA2,
0x41, 0x89, 0x40, 0x00,
0x41, 0x89, 0x58, 0x04,
0x41, 0x89, 0x48, 0x08,
0x41, 0x89, 0x50, 0x0c,
0x5b,
0xc3
};
}
使用方法
var asmCode = new CpuIdAssemblyCode();
CpuIdInfo info = new CpuIdInfo();
asmCode.Call(0, ref info);
asmCode.Dispose();
string ret= info.GetString();
c# - How can I get CPU name in .NET Core? - Stack Overflow
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