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BeneficialCode
42 lines
1.2 KiB
C++
42 lines
1.2 KiB
C++
#include "pch.h"
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#include "NewKernelHandler.h"
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void NewKernelHandler::InitMaxPhyMask(){
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INT cpuInfo[4];// eax,ebx,ecx,edx
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CpuIdEx(cpuInfo, 0x80000008, 0);
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if (cpuInfo[0] != 0) {
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_MaxPhyAddr = cpuInfo[0] & 0xFF;
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_MaxPhyAddrMask = 0xffffffffffffffff;
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_MaxPhyAddrMask = _MaxPhyAddrMask >> _MaxPhyAddr;
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_MaxPhyAddrMask = ~(_MaxPhyAddrMask << _MaxPhyAddr);
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_MaxPhyAddrMaskPb = _MaxPhyAddrMask & 0xfffffffffffff000;
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_MaxLinearAddr = (cpuInfo[0] >> 8) & 0xFF;
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_MaxLinearAddrMask = 0xffffffffffffffff;
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_MaxLinearAddrMask = _MaxLinearAddrMask >> _MaxLinearAddr;
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_MaxLinearAddrMask = _MaxLinearAddrMask << _MaxLinearAddr;
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_MaxLinearAddrTest = 1ull << (_MaxLinearAddr - 1);
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#ifdef _WIN64
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_MaxPhyAddrMaskPbBig = _MaxPhyAddrMask & 0xffffffffffe00000;
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#else
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_MaxPhyAddrMaskPbBig = _MaxPhyAddrMask & 0xffffffffffc00000;
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#endif // _WIN64
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}
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else {
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_MaxPhyAddrMask = 0xffffffffffffffff;
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_MaxLinearAddrMask = 0xffffffffffffffff;
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}
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}
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bool NewKernelHandler::VerifyAddress(ULONG_PTR addr){
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bool result = false;
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if ((addr & _MaxLinearAddrTest) > 0) {
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result = (addr & _MaxLinearAddrMask) == _MaxLinearAddrMask;
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}
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else {
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result = (addr & _MaxLinearAddrMask) == 0;
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}
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return result;
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} |