/// <summary>
/// Per-CPU page hook/unhook routine
/// </summary>
/// <param name="Dpc">Unused</param>
/// <param name="Context">Valid PHOOK_CONTEXT</param>
/// <param name="SystemArgument1">Unused</param>
/// <param name="SystemArgument2">Unused</param>
VOID PHpHookCallbackDPC( IN PRKDPC Dpc, IN PVOID Context, IN PVOID SystemArgument1, IN PVOID SystemArgument2 )
{
UNREFERENCED_PARAMETER( Dpc );
PHOOK_CONTEXT pCTX = (PHOOK_CONTEXT)Context;
if (pCTX != NULL)
__vmx_vmcall( pCTX->Hook ? HYPERCALL_HOOK_PAGE : HYPERCALL_UNHOOK_PAGE, pCTX->DataPagePFN, pCTX->CodePagePFN, pCTX->Type );
KeSignalCallDpcSynchronize( SystemArgument2 );
KeSignalCallDpcDone( SystemArgument1 );
}
static NTSTATUS __ksm_exit_cpu(struct ksm *k)
{
VCPU_DEBUG_RAW("going down\n");
struct vcpu *vcpu = NULL;
size_t err = __vmx_vmcall(HYPERCALL_STOP, &vcpu);
if (err)
VCPU_DEBUG("%d\n", err);
else
VCPU_DEBUG("stopped\n");
k->vcpu_list[vcpu->nr] = NULL;
vcpu_free(vcpu);
k->active_vcpus--;
return err ? STATUS_UNSUCCESSFUL : STATUS_SUCCESS;
}
/// <summary>
/// Revert CPU to non-root mode
/// </summary>
/// <param name="Vcpu">Virtual CPU data</param>
VOID VmxShutdown( IN PVCPU Vcpu )
{
//DPRINT( "HyperBone: CPU %d: %s: CR3 load count %d\n", CPU_IDX, __FUNCTION__, Vcpu->Cr3Loads );
__vmx_vmcall( HYPERCALL_UNLOAD, 0, 0, 0 );
VmxVMCleanup( KGDT64_R3_DATA | RPL_MASK, KGDT64_R3_CMTEB | RPL_MASK );
EptFreeIdentityMap( &Vcpu->EPT );
if (Vcpu->VMXON)
MmFreeContiguousMemory( Vcpu->VMXON );
if (Vcpu->VMCS)
MmFreeContiguousMemory( Vcpu->VMCS );
if (Vcpu->VMMStack)
MmFreeContiguousMemory( Vcpu->VMMStack );
Vcpu->VMXON = NULL;
Vcpu->VMCS = NULL;
Vcpu->VMMStack = NULL;
}