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[NTOS:KE]

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- Load LDT on context switch if required.
CORE-11511 #resolve

svn path=/trunk/; revision=71967
This commit is contained in:
Thomas Faber 2016-07-19 12:51:49 +00:00
parent 280b976e35
commit 4bcb47a522
3 changed files with 23 additions and 6 deletions
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14
reactos/ntoskrnl/ke/i386/context.c
View file

@ -34,9 +34,17 @@ KiSwapProcess(IN PKPROCESS NewProcess,
/* Check for new LDT */
if (NewProcess->LdtDescriptor.LimitLow != OldProcess->LdtDescriptor.LimitLow)
{
/* Not handled yet */
UNIMPLEMENTED_DBGBREAK();
return;
if (NewProcess->LdtDescriptor.LimitLow)
{
KeSetGdtSelector(KGDT_LDT,
((PULONG)&NewProcess->LdtDescriptor)[0],
((PULONG)&NewProcess->LdtDescriptor)[1]);
Ke386SetLocalDescriptorTable(KGDT_LDT);
}
else
{
Ke386SetLocalDescriptorTable(0);
}
}
/* Update CR3 */

2
reactos/ntoskrnl/ke/i386/ldt.c
View file

@ -167,7 +167,7 @@ BOOLEAN PspIsDescriptorValid(PLDT_ENTRY ldt_entry)
if ((Base + SegLimit > (ULONG_PTR) MmHighestUserAddress) ||
(Base > Base+SegLimit))
{
DPRINT1("WARNING: Windows would mark this descriptor invalid!");
DPRINT1("WARNING: Windows would mark this descriptor invalid!\n");
}
/*

13
reactos/ntoskrnl/ke/i386/thrdini.c
View file

@ -345,8 +345,17 @@ KiSwapContextExit(IN PKTHREAD OldThread,
/* Check if there is a different LDT */
if (*(PULONGLONG)&OldProcess->LdtDescriptor != *(PULONGLONG)&NewProcess->LdtDescriptor)
{
DPRINT1("LDT switch not implemented\n");
ASSERT(FALSE);
if (NewProcess->LdtDescriptor.LimitLow)
{
KeSetGdtSelector(KGDT_LDT,
((PULONG)&NewProcess->LdtDescriptor)[0],
((PULONG)&NewProcess->LdtDescriptor)[1]);
Ke386SetLocalDescriptorTable(KGDT_LDT);
}
else
{
Ke386SetLocalDescriptorTable(0);
}
}
/* Switch address space and flush TLB */