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KeStackAttach: Acquire lock before getting thread

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svn path=/trunk/; revision=11305
This commit is contained in:
Alex Ionescu 2004-10-17 03:43:26 +00:00
parent 1f59f1138b
commit b3f049be4f
2 changed files with 13 additions and 11 deletions
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20
reactos/ntoskrnl/ke/i386/kernel.c
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@ -134,30 +134,31 @@ KePrepareForApplicationProcessorInit(ULONG Id)
VOID VOID
KeApplicationProcessorInit(VOID) KeApplicationProcessorInit(VOID)
{ {
PKPCR KPCR; PKPCR Pcr;
ULONG Offset; ULONG Offset;
/* /*
* Create a PCR for this processor * Create a PCR for this processor
*/ */
Offset = InterlockedIncrement((LONG *)&PcrsAllocated) - 1; Offset = InterlockedIncrement((LONG *)&PcrsAllocated) - 1;
KPCR = (PKPCR)(KPCR_BASE + (Offset * PAGE_SIZE)); Pcr = (PKPCR)(KPCR_BASE + (Offset * PAGE_SIZE));
MmCreateVirtualMappingForKernel((PVOID)KPCR, MmCreateVirtualMappingForKernel((PVOID)Pcr,
PAGE_READWRITE, PAGE_READWRITE,
&PcrPages[Offset], &PcrPages[Offset],
1); 1);
memset(KPCR, 0, PAGE_SIZE); memset(Pcr, 0, PAGE_SIZE);
KPCR->ProcessorNumber = (UCHAR)Offset; Pcr->ProcessorNumber = (UCHAR)Offset;
KPCR->Self = KPCR; Pcr->Self = Pcr;
KPCR->Irql = HIGH_LEVEL; Pcr->Tib.Self = &Pcr->Tib;
Pcr->Irql = HIGH_LEVEL;
/* Mark the end of the exception handler list */ /* Mark the end of the exception handler list */
KPCR->Tib.ExceptionList = (PVOID)-1; Pcr->Tib.ExceptionList = (PVOID)-1;
/* /*
* Initialize the GDT * Initialize the GDT
*/ */
KiInitializeGdt(KPCR); KiInitializeGdt(Pcr);
/* /*
* It is now safe to process interrupts * It is now safe to process interrupts
@ -215,6 +216,7 @@ KeInit1(PCHAR CommandLine, PULONG LastKernelAddress)
KPCR = (PKPCR)KPCR_BASE; KPCR = (PKPCR)KPCR_BASE;
memset(KPCR, 0, PAGE_SIZE); memset(KPCR, 0, PAGE_SIZE);
KPCR->Self = (PKPCR)KPCR_BASE; KPCR->Self = (PKPCR)KPCR_BASE;
KPCR->Tib.Self = (PKPCR_TIB)KPCR_BASE;
KPCR->Irql = HIGH_LEVEL; KPCR->Irql = HIGH_LEVEL;
KPCR->GDT = KiBootGdt; KPCR->GDT = KiBootGdt;
KPCR->IDT = (PUSHORT)KiIdt; KPCR->IDT = (PUSHORT)KiIdt;

4
reactos/ntoskrnl/ke/process.c
View file

@ -16,7 +16,7 @@
* along with this program; if not, write to the Free Software * along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/ */
/* $Id: process.c,v 1.29 2004/10/13 22:27:03 ion Exp $ /* $Id: process.c,v 1.30 2004/10/17 03:43:26 ion Exp $
* *
* PROJECT: ReactOS kernel * PROJECT: ReactOS kernel
* FILE: ntoskrnl/ke/process.c * FILE: ntoskrnl/ke/process.c
@ -138,8 +138,8 @@ KeStackAttachProcess (
KIRQL OldIrql; KIRQL OldIrql;
PKTHREAD Thread; PKTHREAD Thread;
Thread = KeGetCurrentThread();
OldIrql = KeAcquireDispatcherDatabaseLock(); OldIrql = KeAcquireDispatcherDatabaseLock();
Thread = KeGetCurrentThread();
/* Crash system if DPC is being executed! */ /* Crash system if DPC is being executed! */
if (KeIsExecutingDpc()) { if (KeIsExecutingDpc()) {