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[HAL] Hack KeTryToAcquireQueuedSpinlock & KeTryToAcquireQueuedSpinLockRaiseToSynch into a somewhat working implementation

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Jérôme Gardou 2021-05-26 17:03:55 +02:00 committed by Jérôme Gardou
parent 91587a432b
commit 56d0bc31ce
1 changed files with 11 additions and 26 deletions
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37
hal/halx86/generic/spinlock.c
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@ -172,6 +172,7 @@ KeReleaseInStackQueuedSpinLock(IN PKLOCK_QUEUE_HANDLE LockHandle)
KeLowerIrql(LockHandle->OldIrql); KeLowerIrql(LockHandle->OldIrql);
} }
#ifndef _MINIHAL_
/* /*
* @implemented * @implemented
*/ */
@ -180,20 +181,12 @@ FASTCALL
KeTryToAcquireQueuedSpinLockRaiseToSynch(IN KSPIN_LOCK_QUEUE_NUMBER LockNumber, KeTryToAcquireQueuedSpinLockRaiseToSynch(IN KSPIN_LOCK_QUEUE_NUMBER LockNumber,
IN PKIRQL OldIrql) IN PKIRQL OldIrql)
{ {
#ifdef CONFIG_SMP PKSPIN_LOCK Lock = KeGetCurrentPrcb()->LockQueue[LockNumber].Lock;
ERROR_DBGBREAK("FIXME: Unused\n"); // FIXME: Unused
return FALSE;
#endif
/* Simply raise to synch */ /* KM tests demonstrate that this raises IRQL even if locking fails */
KeRaiseIrql(SYNCH_LEVEL, OldIrql); KeRaiseIrql(SYNCH_LEVEL, OldIrql);
/* HACK */
/* Add an explicit memory barrier to prevent the compiler from reordering return KeTryToAcquireSpinLockAtDpcLevel(Lock);
memory accesses across the borders of spinlocks */
KeMemoryBarrierWithoutFence();
/* Always return true on UP Machines */
return TRUE;
} }
/* /*
@ -204,23 +197,15 @@ FASTCALL
KeTryToAcquireQueuedSpinLock(IN KSPIN_LOCK_QUEUE_NUMBER LockNumber, KeTryToAcquireQueuedSpinLock(IN KSPIN_LOCK_QUEUE_NUMBER LockNumber,
OUT PKIRQL OldIrql) OUT PKIRQL OldIrql)
{ {
#ifdef CONFIG_SMP PKSPIN_LOCK Lock = KeGetCurrentPrcb()->LockQueue[LockNumber].Lock;
ERROR_DBGBREAK("FIXME: Unused\n"); // FIXME: Unused
return FALSE;
#endif
/* Simply raise to dispatch */ /* KM tests demonstrate that this raises IRQL even if locking fails */
KeRaiseIrql(DISPATCH_LEVEL, OldIrql); KeRaiseIrql(DISPATCH_LEVEL, OldIrql);
/* HACK */
/* Add an explicit memory barrier to prevent the compiler from reordering return KeTryToAcquireSpinLockAtDpcLevel(Lock);
memory accesses across the borders of spinlocks */
KeMemoryBarrierWithoutFence();
/* Always return true on UP Machines */
return TRUE;
} }
#endif /* !defined(_MINIHAL_) */
#endif #endif /* defined(_M_IX86) */
VOID VOID
NTAPI NTAPI