[tkreuzer] 43824: Partly implement KiDebugTrapOrFault. Single stepping now works.

Author: tkreuzer
Date: Thu Oct 29 00:54:07 2009
New Revision: 43824

URL: http://svn.reactos.org/svn/reactos?rev=43824&view=rev
Log:
Partly implement KiDebugTrapOrFault. Single stepping now works.

Modified:
    branches/ros-amd64-bringup/reactos/ntoskrnl/ke/amd64/trap.S

Modified: branches/ros-amd64-bringup/reactos/ntoskrnl/ke/amd64/trap.S
URL:
http://svn.reactos.org/svn/reactos/branches/ros-amd64-bringup/reactos/ntosk…
==============================================================================
--- branches/ros-amd64-bringup/reactos/ntoskrnl/ke/amd64/trap.S [iso-8859-1] (original)
+++ branches/ros-amd64-bringup/reactos/ntoskrnl/ke/amd64/trap.S [iso-8859-1] Thu Oct 29
00:54:07 2009
@@ -242,9 +242,22 @@
     push 0
     .allocstack 0x8
 
-    UNIMPLEMENTED KiDebugTrapOrFault
-
-    jmp $
+    ENTER_TRAP_FRAME (SIZE_EXCEPTION_RECORD + 0x28), 0
+
+    /* Check if the frame was from kernelmode */
+    test word ptr [rbp + KTRAP_FRAME_SegCs], 3
+    jz KiDebugTrapOrFaultKMode
+
+    /* Enable interrupts for user-mode */
+    sti
+
+KiDebugTrapOrFaultKMode:
+
+    DISPATCH_EXCEPTION STATUS_SINGLE_STEP, 0, 0, 0, 0
+
+    /* Return */
+    LEAVE_TRAP_FRAME
+    iretq
 .endproc
 
 .proc KiNmiInterrupt