DECLSPEC_ALIGN FrLdrDbgPrint KiDoubleFaultStack KiFreezeExecutionLock KiInitializeCpu KiInitializeKernelMachineDependent KiInitializePcr KiInitializeSegments KiInitializeTss KiInitialPcr KiInitMachineDependent KiInitModuleList KiSystemCallEntry32 KiSystemCallEntry64 KiSystemStartup LdrCoreEntries NDEBUG P0BootStack REQUIRED_FEATURE_BITS

VOID NTAPI KiInitializeCpu ( PKIPCR  Pcr ) Definition at line 163 of file kiinit.c. Referenced by KiSystemStartup(). { ULONG FeatureBits; /* Initialize gs */ KiInitializeSegments(); /* Set GS base */ __writemsr(MSR_GS_BASE, (ULONG64)Pcr); __writemsr(MSR_GS_SWAP, (ULONG64)Pcr); /* Detect and set the CPU Type */ KiSetProcessorType(); /* Get the processor features for this CPU */ FeatureBits = KiGetFeatureBits(); /* Check if we support all needed features */ if ((FeatureBits & REQUIRED_FEATURE_BITS) != REQUIRED_FEATURE_BITS) { /* If not, bugcheck system */ FrLdrDbgPrint("CPU doesn't have needed features! Has: 0x%x, required: 0x%x\n", FeatureBits, REQUIRED_FEATURE_BITS); KeBugCheck(0); } /* Set DEP to always on */ SharedUserData->NXSupportPolicy = NX_SUPPORT_POLICY_ALWAYSON; FeatureBits |= KF_NX_ENABLED; /* Save feature bits */ Pcr->Prcb.FeatureBits = FeatureBits; /* Enable fx save restore support */ __writecr4(__readcr4() | CR4_FXSR); /* Enable XMMI exceptions */ __writecr4(__readcr4() | CR4_XMMEXCPT); /* Enable Write-Protection */ __writecr0(__readcr0() | CR0_WP); /* Disable fpu monitoring */ __writecr0(__readcr0() & ~CR0_MP); /* Disable x87 fpu exceptions */ __writecr0(__readcr0() & ~CR0_NE); /* LDT is unused */ __lldt(0); /* Set the systemcall entry points */ __writemsr(MSR_LSTAR, (ULONG64)KiSystemCallEntry64); __writemsr(MSR_CSTAR, (ULONG64)KiSystemCallEntry32); __writemsr(MSR_STAR, ((ULONG64)KGDT64_R0_CODE << 32) | ((ULONG64)(KGDT64_R3_CMCODE|RPL_MASK) << 48)); /* Set the flags to be cleared when doing a syscall */ __writemsr(MSR_SYSCALL_MASK, EFLAGS_IF_MASK | EFLAGS_TF | EFLAGS_DF); /* Enable syscall instruction */ __writemsr(MSR_EFER, __readmsr(MSR_EFER) | MSR_SCE); }