[fireball] 29477: - Copy kernel's IDT entries to the IDT we've got from the bootloader. Fixes boot-process initiated by ntldr-compatible loaders.

Author: fireball
Date: Wed Oct 10 16:39:54 2007
New Revision: 29477

URL: http://svn.reactos.org/svn/reactos?rev=29477&view=rev
Log:
- Copy kernel's IDT entries to the IDT we've got from the bootloader. Fixes boot-process initiated by ntldr-compatible loaders.

Modified:
    trunk/reactos/ntoskrnl/ke/i386/kiinit.c

Modified: trunk/reactos/ntoskrnl/ke/i386/kiinit.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/ke/i386/kiinit.c?r...
==============================================================================
--- trunk/reactos/ntoskrnl/ke/i386/kiinit.c (original)
+++ trunk/reactos/ntoskrnl/ke/i386/kiinit.c Wed Oct 10 16:39:54 2007
@@ -661,6 +661,7 @@
     ULONG InitialStack;
     PKGDTENTRY Gdt;
     PKIDTENTRY Idt;
+    KIDTENTRY NmiEntry, DoubleFaultEntry;
     PKTSS Tss;
     PKIPCR Pcr;

@@ -722,6 +723,19 @@
     Ke386SetDs(KGDT_R3_DATA | RPL_MASK);
     Ke386SetEs(KGDT_R3_DATA | RPL_MASK);

+    /* Save NMI and double fault traps */
+    RtlCopyMemory(&NmiEntry, &Idt[2], sizeof(KIDTENTRY));
+    RtlCopyMemory(&DoubleFaultEntry, &Idt[8], sizeof(KIDTENTRY));
+
+    /* Copy kernel's trap handlers */
+    RtlCopyMemory(Idt,
+                  (PVOID)KiIdtDescriptor.Base,
+                  KiIdtDescriptor.Limit + 1);
+
+    /* Restore NMI and double fault */
+    RtlCopyMemory(&Idt[2], &NmiEntry, sizeof(KIDTENTRY));
+    RtlCopyMemory(&Idt[8], &DoubleFaultEntry, sizeof(KIDTENTRY));
+
 AppCpuInit:
     /* Loop until we can release the freeze lock */
     do