x86 / x64 CPUID en C#
lié à mon autre question , s'il vous plaît aidez-moi à déboguer "une exception non manipulée du système de type'.AccessViolationException " s'est produit dans le Module inconnu. Informations supplémentaires: Tentative de lecture ou d'écriture de mémoire protégée. Cela indique souvent que d'autres souvenirs sont corrompus."En parcourant le code, Tout fonctionne jusqu'à l'appel réel à del() et échoue dans cette ligne.
ce code est basé sur cet article exemple et ce code python qui fonctionne en python. Je ne peux pas obtenir l'exemple de code comme-est de travailler soit (même exception), mais j'espère que c'est juste un peu dépassé ou quelque chose.
EDIT: voir l'historique d'edit si vous vous souciez de la façon dont nous sommes arrivés ici, ce qui est inintéressant.
version de travail terminée:
public static class CpuID
{
public static byte[] Invoke(int level)
{
IntPtr codePointer = IntPtr.Zero;
try
{
// compile
byte[] codeBytes;
if (IntPtr.Size == 4)
{
codeBytes = x86CodeBytes;
}
else
{
codeBytes = x64CodeBytes;
}
codePointer = VirtualAlloc(
IntPtr.Zero,
new UIntPtr((uint)codeBytes.Length),
AllocationType.COMMIT | AllocationType.RESERVE,
MemoryProtection.EXECUTE_READWRITE
);
Marshal.Copy(codeBytes, 0, codePointer, codeBytes.Length);
CpuIDDelegate cpuIdDelg = (CpuIDDelegate)Marshal.GetDelegateForFunctionPointer(codePointer, typeof(CpuIDDelegate));
// invoke
GCHandle handle = default(GCHandle);
var buffer = new byte[16];
try
{
handle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
cpuIdDelg(level, buffer);
}
finally
{
if (handle != default(GCHandle))
{
handle.Free();
}
}
return buffer;
}
finally
{
if (codePointer != IntPtr.Zero)
{
VirtualFree(codePointer, 0, 0x8000);
codePointer = IntPtr.Zero;
}
}
}
[UnmanagedFunctionPointerAttribute(CallingConvention.Cdecl)]
private delegate void CpuIDDelegate(int level, byte[] buffer);
[DllImport("kernel32.dll", SetLastError = true)]
private static extern IntPtr VirtualAlloc(IntPtr lpAddress, UIntPtr dwSize, AllocationType flAllocationType,
MemoryProtection flProtect);
[DllImport("kernel32")]
private static extern bool VirtualFree(IntPtr lpAddress, UInt32 dwSize, UInt32 dwFreeType);
[Flags()]
private enum AllocationType : uint
{
COMMIT = 0x1000,
RESERVE = 0x2000,
RESET = 0x80000,
LARGE_PAGES = 0x20000000,
PHYSICAL = 0x400000,
TOP_DOWN = 0x100000,
WRITE_WATCH = 0x200000
}
[Flags()]
private enum MemoryProtection : uint
{
EXECUTE = 0x10,
EXECUTE_READ = 0x20,
EXECUTE_READWRITE = 0x40,
EXECUTE_WRITECOPY = 0x80,
NOACCESS = 0x01,
READONLY = 0x02,
READWRITE = 0x04,
WRITECOPY = 0x08,
GUARD_Modifierflag = 0x100,
NOCACHE_Modifierflag = 0x200,
WRITECOMBINE_Modifierflag = 0x400
}
// Basic ASM strategy --
// void x86CpuId(int level, byte* buffer)
// {
// eax = level
// cpuid
// buffer[0] = eax
// buffer[4] = ebx
// buffer[8] = ecx
// buffer[12] = edx
// }
private readonly static byte[] x86CodeBytes = {
0x55, // push ebp
0x8B, 0xEC, // mov ebp,esp
0x53, // push ebx
0x57, // push edi
0x8B, 0x45, 0x08, // mov eax, dword ptr [ebp+8] (move level into eax)
0x0F, 0xA2, // cpuid
0x8B, 0x7D, 0x0C, // mov edi, dword ptr [ebp+12] (move address of buffer into edi)
0x89, 0x07, // mov dword ptr [edi+0], eax (write eax, ... to buffer)
0x89, 0x5F, 0x04, // mov dword ptr [edi+4], ebx
0x89, 0x4F, 0x08, // mov dword ptr [edi+8], ecx
0x89, 0x57, 0x0C, // mov dword ptr [edi+12],edx
0x5F, // pop edi
0x5B, // pop ebx
0x8B, 0xE5, // mov esp,ebp
0x5D, // pop ebp
0xc3 // ret
};
private readonly static byte[] x64CodeBytes = {
0x53, // push rbx this gets clobbered by cpuid
// rcx is level
// rdx is buffer.
// Need to save buffer elsewhere, cpuid overwrites rdx
// Put buffer in r8, use r8 to reference buffer later.
// Save rdx (buffer addy) to r8
0x49, 0x89, 0xd0, // mov r8, rdx
// Move ecx (level) to eax to call cpuid, call cpuid
0x89, 0xc8, // mov eax, ecx
0x0F, 0xA2, // cpuid
// Write eax et al to buffer
0x41, 0x89, 0x40, 0x00, // mov dword ptr [r8+0], eax
0x41, 0x89, 0x58, 0x04, // mov dword ptr [r8+4], ebx
0x41, 0x89, 0x48, 0x08, // mov dword ptr [r8+8], ecx
0x41, 0x89, 0x50, 0x0c, // mov dword ptr [r8+12], edx
0x5b, // pop rbx
0xc3 // ret
};
}
notez que CPUID0 doit être lu dans la droite ordre:
//a twelve character ASCII string stored in EBX, EDX, ECX - in that order
var cpuid0s = new string(ASCIIEncoding.ASCII.GetChars(
cpuid0.Skip(4).Take(4).Concat(
cpuid0.Skip(12).Take(4)).Concat(
cpuid0.Skip(8).Take(4)).ToArray()));
29
demandé sur
Community
2010-07-10 01:00:28
6 réponses
je suis assez certain que vous êtes bloqué par DEP . Les réseaux de bytes x_CPUIDy_INSNS se trouvent dans un segment de mémoire marqué comme données et non exécutable.
EDIT:
cela dit, j'ai eu une version qui compile et tourne, mais je ne pense pas avoir les bonnes valeurs. Peut-être cela vous mettra sur votre chemin.
EDIT 2:
je pense que j'ai les bonnes valeurs qui reviennent maintenant. Se sentir libre pour valider.
namespace CPUID
{
using System;
using System.Globalization;
using System.Linq;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Text;
internal static class Program
{
[Flags]
private enum AllocationTypes : uint
{
Commit = 0x1000,
Reserve = 0x2000,
Reset = 0x80000,
LargePages = 0x20000000,
Physical = 0x400000,
TopDown = 0x100000,
WriteWatch = 0x200000
}
[Flags]
private enum MemoryProtections : uint
{
Execute = 0x10,
ExecuteRead = 0x20,
ExecuteReadWrite = 0x40,
ExecuteWriteCopy = 0x80,
NoAccess = 0x01,
ReadOnly = 0x02,
ReadWrite = 0x04,
WriteCopy = 0x08,
GuartModifierflag = 0x100,
NoCacheModifierflag = 0x200,
WriteCombineModifierflag = 0x400
}
[Flags]
private enum FreeTypes : uint
{
Decommit = 0x4000,
Release = 0x8000
}
[UnmanagedFunctionPointerAttribute(CallingConvention.Cdecl)]
private unsafe delegate void CPUID0Delegate(byte* buffer);
[UnmanagedFunctionPointerAttribute(CallingConvention.Cdecl)]
private unsafe delegate void CPUID1Delegate(byte* buffer);
private static void Main()
{
Console.WriteLine("CPUID0: {0}", string.Join(", ", CPUID0().Select(x => x.ToString("X2", CultureInfo.InvariantCulture))));
Console.WriteLine("CPUID0: {0}", new string(ASCIIEncoding.ASCII.GetChars(CPUID0())));
Console.WriteLine("CPUID1: {0}", string.Join(", ", CPUID1().Select(x => x.ToString("X2", CultureInfo.InvariantCulture))));
Console.ReadLine();
}
private static unsafe byte[] CPUID0()
{
byte[] buffer = new byte[12];
if (IntPtr.Size == 4)
{
IntPtr p = NativeMethods.VirtualAlloc(
IntPtr.Zero,
new UIntPtr((uint)x86_CPUID0_INSNS.Length),
AllocationTypes.Commit | AllocationTypes.Reserve,
MemoryProtections.ExecuteReadWrite);
try
{
Marshal.Copy(x86_CPUID0_INSNS, 0, p, x86_CPUID0_INSNS.Length);
CPUID0Delegate del = (CPUID0Delegate)Marshal.GetDelegateForFunctionPointer(p, typeof(CPUID0Delegate));
fixed (byte* newBuffer = &buffer[0])
{
del(newBuffer);
}
}
finally
{
NativeMethods.VirtualFree(p, 0, FreeTypes.Release);
}
}
else if (IntPtr.Size == 8)
{
IntPtr p = NativeMethods.VirtualAlloc(
IntPtr.Zero,
new UIntPtr((uint)x64_CPUID0_INSNS.Length),
AllocationTypes.Commit | AllocationTypes.Reserve,
MemoryProtections.ExecuteReadWrite);
try
{
Marshal.Copy(x64_CPUID0_INSNS, 0, p, x64_CPUID0_INSNS.Length);
CPUID0Delegate del = (CPUID0Delegate)Marshal.GetDelegateForFunctionPointer(p, typeof(CPUID0Delegate));
fixed (byte* newBuffer = &buffer[0])
{
del(newBuffer);
}
}
finally
{
NativeMethods.VirtualFree(p, 0, FreeTypes.Release);
}
}
return buffer;
}
private static unsafe byte[] CPUID1()
{
byte[] buffer = new byte[12];
if (IntPtr.Size == 4)
{
IntPtr p = NativeMethods.VirtualAlloc(
IntPtr.Zero,
new UIntPtr((uint)x86_CPUID1_INSNS.Length),
AllocationTypes.Commit | AllocationTypes.Reserve,
MemoryProtections.ExecuteReadWrite);
try
{
Marshal.Copy(x86_CPUID1_INSNS, 0, p, x86_CPUID1_INSNS.Length);
CPUID1Delegate del = (CPUID1Delegate)Marshal.GetDelegateForFunctionPointer(p, typeof(CPUID1Delegate));
fixed (byte* newBuffer = &buffer[0])
{
del(newBuffer);
}
}
finally
{
NativeMethods.VirtualFree(p, 0, FreeTypes.Release);
}
}
else if (IntPtr.Size == 8)
{
IntPtr p = NativeMethods.VirtualAlloc(
IntPtr.Zero,
new UIntPtr((uint)x64_CPUID1_INSNS.Length),
AllocationTypes.Commit | AllocationTypes.Reserve,
MemoryProtections.ExecuteReadWrite);
try
{
Marshal.Copy(x64_CPUID1_INSNS, 0, p, x64_CPUID1_INSNS.Length);
CPUID1Delegate del = (CPUID1Delegate)Marshal.GetDelegateForFunctionPointer(p, typeof(CPUID1Delegate));
fixed (byte* newBuffer = &buffer[0])
{
del(newBuffer);
}
}
finally
{
NativeMethods.VirtualFree(p, 0, FreeTypes.Release);
}
}
return buffer;
}
private static class NativeMethods
{
[DllImport("kernel32.dll", SetLastError = true)]
internal static extern IntPtr VirtualAlloc(
IntPtr lpAddress,
UIntPtr dwSize,
AllocationTypes flAllocationType,
MemoryProtections flProtect);
[DllImport("kernel32")]
[return: MarshalAs(UnmanagedType.Bool)]
internal static extern bool VirtualFree(
IntPtr lpAddress,
uint dwSize,
FreeTypes flFreeType);
}
#region ASM
private static readonly byte[] x86_CPUID0_INSNS = new byte[]
{
0x53, // push %ebx
0x31, 0xc0, // xor %eax,%eax
0x0f, 0xa2, // cpuid
0x8b, 0x44, 0x24, 0x08, // mov 0x8(%esp),%eax
0x89, 0x18, // mov %ebx,0x0(%eax)
0x89, 0x50, 0x04, // mov %edx,0x4(%eax)
0x89, 0x48, 0x08, // mov %ecx,0x8(%eax)
0x5b, // pop %ebx
0xc3 // ret
};
private static readonly byte[] x86_CPUID1_INSNS = new byte[]
{
0x53, // push %ebx
0x31, 0xc0, // xor %eax,%eax
0x40, // inc %eax
0x0f, 0xa2, // cpuid
0x5b, // pop %ebx
0xc3 // ret
};
private static readonly byte[] x64_CPUID0_INSNS = new byte[]
{
0x49, 0x89, 0xd8, // mov %rbx,%r8
0x49, 0x89, 0xc9, // mov %rcx,%r9
0x48, 0x31, 0xc0, // xor %rax,%rax
0x0f, 0xa2, // cpuid
0x4c, 0x89, 0xc8, // mov %r9,%rax
0x89, 0x18, // mov %ebx,0x0(%rax)
0x89, 0x50, 0x04, // mov %edx,0x4(%rax)
0x89, 0x48, 0x08, // mov %ecx,0x8(%rax)
0x4c, 0x89, 0xc3, // mov %r8,%rbx
0xc3 // retq
};
private static readonly byte[] x64_CPUID1_INSNS = new byte[]
{
0x53, // push %rbx
0x48, 0x31, 0xc0, // xor %rax,%rax
0x48, 0xff, 0xc0, // inc %rax
0x0f, 0xa2, // cpuid
0x5b, // pop %rbx
0xc3 // retq
};
#endregion
}
}
16
répondu
Jesse C. Slicer
2013-10-09 02:20:07
j'ai décidé d'améliorer votre réponse. Il n'a plus besoin d'être dangereux pour compiler, et il n'a besoin que de deux blocs d'assemblage pour pouvoir lire tous les blocs cpuid, car il n'écrit que eax/ebx/ecx/edx sur un tableau d'octets de 16 octets.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Reflection;
using System.Runtime.InteropServices;
namespace CpuID
{
public class CpuID : IDisposable
{
[UnmanagedFunctionPointerAttribute(CallingConvention.Cdecl)]
public delegate void CpuIDDelegate(int level, byte[] buffer);
[DllImport("kernel32.dll", SetLastError = true)]
private static extern IntPtr VirtualAlloc(
IntPtr lpAddress,
UIntPtr dwSize,
AllocationType flAllocationType,
MemoryProtection flProtect
);
[DllImport("kernel32")]
private static extern bool VirtualFree(
IntPtr lpAddress,
UInt32 dwSize,
UInt32 dwFreeType
);
[Flags()]
public enum AllocationType : uint
{
COMMIT = 0x1000,
RESERVE = 0x2000,
RESET = 0x80000,
LARGE_PAGES = 0x20000000,
PHYSICAL = 0x400000,
TOP_DOWN = 0x100000,
WRITE_WATCH = 0x200000
}
[Flags()]
public enum MemoryProtection : uint
{
EXECUTE = 0x10,
EXECUTE_READ = 0x20,
EXECUTE_READWRITE = 0x40,
EXECUTE_WRITECOPY = 0x80,
NOACCESS = 0x01,
READONLY = 0x02,
READWRITE = 0x04,
WRITECOPY = 0x08,
GUARD_Modifierflag = 0x100,
NOCACHE_Modifierflag = 0x200,
WRITECOMBINE_Modifierflag = 0x400
}
private CpuIDDelegate cpuIdDelg;
private IntPtr codePointer;
// void x86CpuId(int level, byte* buffer)
// {
// eax = level
// cpuid
// buffer[0] = eax
// buffer[4] = ebx
// buffer[8] = ecx
// buffer[12] = edx
// }
private byte[] x86CodeBytes =
{
0x55, // push ebp
0x8B, 0xEC, // mov ebp,esp
0x53, // push ebx
0x57, // push edi
0x8B, 0x45, 0x08, // mov eax, dword ptr [ebp+8] (move level into eax)
0x0F, 0xA2, // cpuid
0x8B, 0x7D, 0x0C, // mov edi, dword ptr [ebp+12] (move address of buffer into edi)
0x89, 0x07, // mov dword ptr [edi+0], eax (write eax, ... to buffer)
0x89, 0x5F, 0x04, // mov dword ptr [edi+4], ebx
0x89, 0x4F, 0x08, // mov dword ptr [edi+8], ecx
0x89, 0x57, 0x0C, // mov dword ptr [edi+12],edx
0x5F, // pop edi
0x5B, // pop ebx
0x8B, 0xE5, // mov esp,ebp
0x5D, // pop ebp
0xc3 // ret
};
private byte[] x64CodeBytes =
{
0x53, // push rbx this gets clobbered by cpuid
// rcx is level
// rdx is buffer.
// Need to save buffer elsewhere, cpuid overwrites rdx
// Put buffer in r8, use r8 to reference buffer later.
// Save rdx (buffer addy) to r8
0x49, 0x89, 0xd0, // mov r8, rdx
// Move ecx (level) to eax to call cpuid, call cpuid
0x89, 0xc8, // mov eax, ecx
0x0F, 0xA2, // cpuid
// Write eax et al to buffer
0x41, 0x89, 0x40, 0x00, // mov dword ptr [r8+0], eax
0x41, 0x89, 0x58, 0x04, // mov dword ptr [r8+4], ebx
0x41, 0x89, 0x48, 0x08, // mov dword ptr [r8+8], ecx
0x41, 0x89, 0x50, 0x0c, // mov dword ptr [r8+12], edx
0x5b, // pop rbx
0xc3 // ret
};
public CpuID()
{
Compile();
}
~CpuID()
{
Dispose(false);
}
private void Compile()
{
byte[] codeBytes;
if (IntPtr.Size == 4)
{
codeBytes = x86CodeBytes;
}
else
{
codeBytes = x64CodeBytes;
}
this.codePointer = VirtualAlloc(
IntPtr.Zero,
new UIntPtr((uint)codeBytes.Length),
AllocationType.COMMIT | AllocationType.RESERVE,
MemoryProtection.EXECUTE_READWRITE
);
Marshal.Copy(codeBytes, 0, this.codePointer, codeBytes.Length);
this.cpuIdDelg = (CpuIDDelegate)Marshal.GetDelegateForFunctionPointer(this.codePointer, typeof(CpuIDDelegate));
}
public void Invoke(int level, byte[] buffer)
{
GCHandle handle = default(GCHandle);
if (buffer.Length < 16)
{
throw new ArgumentException("buffer must be at least 16 bytes long");
}
try
{
handle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
this.cpuIdDelg(level, buffer);
}
finally
{
if (handle != default(GCHandle))
{
handle.Free();
}
}
}
public void Dispose()
{
Dispose(true);
}
public void Dispose(bool disposing)
{
if (this.codePointer != IntPtr.Zero)
{
VirtualFree(this.codePointer, 0, 0x8000);
this.codePointer = IntPtr.Zero;
}
}
}
}
10
répondu
antiduh
2011-11-01 16:16:50
j'ai pris le code de @antiduh et je l'ai transformé en une méthode statique, donc il n'y a pas de cycle de vie d'objet à gérer. C'est plus lent parce que le code ASM n'est pas réutilisé entre les appels à invoquer(), mais le compromis entre la vitesse et la simplicité est logique pour mon cas d'utilisation. Cette nouvelle version peut appeler CPUID 1000 fois en 15 millisecondes sur ma machine.
Merci pour le code merveilleux gars!
public static class CpuID {
public static byte[] Invoke(int level) {
IntPtr codePointer = IntPtr.Zero;
try {
// compile
byte[] codeBytes;
if (IntPtr.Size == 4) {
codeBytes = x86CodeBytes;
} else {
codeBytes = x64CodeBytes;
}
codePointer = VirtualAlloc(
IntPtr.Zero,
new UIntPtr((uint)codeBytes.Length),
AllocationType.COMMIT | AllocationType.RESERVE,
MemoryProtection.EXECUTE_READWRITE
);
Marshal.Copy(codeBytes, 0, codePointer, codeBytes.Length);
CpuIDDelegate cpuIdDelg = (CpuIDDelegate)Marshal.GetDelegateForFunctionPointer(codePointer, typeof(CpuIDDelegate));
// invoke
GCHandle handle = default(GCHandle);
var buffer = new byte[16];
try {
handle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
cpuIdDelg(level, buffer);
} finally {
if (handle != default(GCHandle)) {
handle.Free();
}
}
return buffer;
} finally {
if (codePointer != IntPtr.Zero) {
VirtualFree(codePointer, 0, 0x8000);
codePointer = IntPtr.Zero;
}
}
}
[UnmanagedFunctionPointerAttribute(CallingConvention.Cdecl)]
private delegate void CpuIDDelegate(int level, byte[] buffer);
[DllImport("kernel32.dll", SetLastError = true)]
private static extern IntPtr VirtualAlloc(IntPtr lpAddress, UIntPtr dwSize, AllocationType flAllocationType,
MemoryProtection flProtect);
[DllImport("kernel32")]
private static extern bool VirtualFree(IntPtr lpAddress, UInt32 dwSize, UInt32 dwFreeType);
[Flags()]
private enum AllocationType : uint {
COMMIT = 0x1000,
RESERVE = 0x2000,
RESET = 0x80000,
LARGE_PAGES = 0x20000000,
PHYSICAL = 0x400000,
TOP_DOWN = 0x100000,
WRITE_WATCH = 0x200000
}
[Flags()]
private enum MemoryProtection : uint {
EXECUTE = 0x10,
EXECUTE_READ = 0x20,
EXECUTE_READWRITE = 0x40,
EXECUTE_WRITECOPY = 0x80,
NOACCESS = 0x01,
READONLY = 0x02,
READWRITE = 0x04,
WRITECOPY = 0x08,
GUARD_Modifierflag = 0x100,
NOCACHE_Modifierflag = 0x200,
WRITECOMBINE_Modifierflag = 0x400
}
// Basic ASM strategy --
// void x86CpuId(int level, byte* buffer)
// {
// eax = level
// cpuid
// buffer[0] = eax
// buffer[4] = ebx
// buffer[8] = ecx
// buffer[12] = edx
// }
private readonly static byte[] x86CodeBytes = {
0x55, // push ebp
0x8B, 0xEC, // mov ebp,esp
0x53, // push ebx
0x57, // push edi
0x8B, 0x45, 0x08, // mov eax, dword ptr [ebp+8] (move level into eax)
0x0F, 0xA2, // cpuid
0x8B, 0x7D, 0x0C, // mov edi, dword ptr [ebp+12] (move address of buffer into edi)
0x89, 0x07, // mov dword ptr [edi+0], eax (write eax, ... to buffer)
0x89, 0x5F, 0x04, // mov dword ptr [edi+4], ebx
0x89, 0x4F, 0x08, // mov dword ptr [edi+8], ecx
0x89, 0x57, 0x0C, // mov dword ptr [edi+12],edx
0x5F, // pop edi
0x5B, // pop ebx
0x8B, 0xE5, // mov esp,ebp
0x5D, // pop ebp
0xc3 // ret
};
private readonly static byte[] x64CodeBytes = {
0x53, // push rbx this gets clobbered by cpuid
// rcx is level
// rdx is buffer.
// Need to save buffer elsewhere, cpuid overwrites rdx
// Put buffer in r8, use r8 to reference buffer later.
// Save rdx (buffer addy) to r8
0x49, 0x89, 0xd0, // mov r8, rdx
// Move ecx (level) to eax to call cpuid, call cpuid
0x89, 0xc8, // mov eax, ecx
0x0F, 0xA2, // cpuid
// Write eax et al to buffer
0x41, 0x89, 0x40, 0x00, // mov dword ptr [r8+0], eax
0x41, 0x89, 0x58, 0x04, // mov dword ptr [r8+4], ebx
0x41, 0x89, 0x48, 0x08, // mov dword ptr [r8+8], ecx
0x41, 0x89, 0x50, 0x0c, // mov dword ptr [r8+12], edx
0x5b, // pop rbx
0xc3 // ret
};
}
5
répondu
adam smith
2011-12-05 19:38:34
puis-je suggérer la page suivante: http://devpinoy.org/blogs/cvega/archive/2006/04/07/2658.aspx
cette page vous montrera le code source de l'assemblée pour CPUID, comment le compiler dans une DLL et comment l'appeler de C#.
aussi si vous avez besoin d'autres procédures d'identification du matériel, puis-je suggérer cette page: http://www.codeproject.com/KB/system/GetHardwareInformation.aspx
cette page montre comment obtenir des informations comme des informations de carte mère, des informations de disque dur, des informations de cpu, des informations de carte vidéo, etc
2
répondu
Icemanind
2010-07-09 21:32:58
en outre, pour obtenir CPUID4, un argument de plus est nécessaire. Voici comment vous obtenez CPUID0, CPUID1, CPUID2, CPUID4.
byte[] cpuid0 = Invoke(0, 0);
byte[] cpuid1 = Invoke(1, 0);
byte[] cpuid2 = Invoke(2, 0);
List<byte[]> cpuid4L = new List<byte[]>();
for (int i = 0; true; i++)
{
byte[] cpuid4 = Invoke(4, (uint)i);
if ( (cpuid4[0] & 0x0F) == 0)
break;
cpuid4L.Add(cpuid4);
}
private static byte[] Invoke(uint functionNum, uint ecx)
{
IntPtr codePointer = IntPtr.Zero;
try
{
// Select a code
byte[] codeBytes;
if (IntPtr.Size == 4)
codeBytes = x86CodeBytes;
else
codeBytes = x64CodeBytes;
codePointer = NativeMethods.VirtualAlloc(IntPtr.Zero, new UIntPtr((uint)codeBytes.Length), MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE);
Marshal.Copy(codeBytes, 0, codePointer, codeBytes.Length);
CpuIdDelegate cpuIdDelg = (CpuIdDelegate)Marshal.GetDelegateForFunctionPointer(codePointer, typeof(CpuIdDelegate));
// Invoke the code
GCHandle handle = default(GCHandle);
var buffer = new byte[16];
try
{
handle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
cpuIdDelg(ecx, functionNum, buffer); // Run the assembly code.
}
finally
{
if (handle != default(GCHandle))
{
handle.Free();
}
}
return buffer;
}
finally
{
if (codePointer != IntPtr.Zero)
{
NativeMethods.VirtualFree(codePointer, (UIntPtr) 0, MEM_RELEASE);
codePointer = IntPtr.Zero;
}
}
}
private readonly static byte[] x86CodeBytes = {
0x55,
0x8B, 0xEC,
0x53,
0x57,
0x8B, 0x4D, 0x08,
0x8B, 0x45, 0x0C,
0x0F, 0xA2,
0x8B, 0x7D, 0x10,
0x89, 0x07,
0x89, 0x5F, 0x04,
0x89, 0x4F, 0x08,
0x89, 0x57, 0x0C,
0x5F,
0x5B,
0x8B, 0xE5,
0x5D,
0xc3
};
private readonly static byte[] x64CodeBytes = {
0x53,
0x89, 0xD0,
0x0F, 0xA2,
0x41, 0x89, 0x40, 0x00,
0x41, 0x89, 0x58, 0x04,
0x41, 0x89, 0x48, 0x08,
0x41, 0x89, 0x50, 0x0c,
0x5b,
0xc3
};
0
répondu
John
2017-04-11 20:51:11
merci à @antiduh pour sa solution. Je changerais un peu la signature Invoke pour une meilleure utilisabilité comme suit, donc vous n'avez pas besoin d'allouer un get le résultat comme un ensemble de registres
// This is a modification to https://stackoverflow.com/a/7964376/725903
[UnmanagedFunctionPointerAttribute(CallingConvention.Cdecl)]
private delegate void CpuIDDelegate(int level, IntPtr ptr);
[StructLayout(LayoutKind.Sequential, Size = 16)]
public struct CpuIdResult
{
public int Eax;
public int Ebx;
public int Ecx;
public int Edx;
}
public CpuIdResult Invoke(int level)
{
CpuIdResult result;
IntPtr buffer = Marshal.AllocHGlobal(16);
try
{
this.cpuIdDelg(level, buffer);
result = (CpuIdResult)Marshal.PtrToStructure(buffer, typeof(CpuIdResult));
}
finally
{
Marshal.FreeHGlobal(buffer);
}
return result;
}
0
répondu
mistika
2017-05-26 20:14:04