[ion] 26142: - Fix an important bug which was causing us to incorrectly set the DPC Stack in the Processor Region Control Block. - Enable usage of the DPC Stack during DPCs. - Enable usage of the DPC Stack during Fast System Calls and put back the correct push/pop code in FASTCALL_PROLOG.

Author: ion
Date: Tue Mar 20 00:53:38 2007
New Revision: 26142

URL: http://svn.reactos.org/svn/reactos?rev=26142&view=rev
Log:
- Fix an important bug which was causing us to incorrectly set the DPC Stack in the Processor Region Control Block.
- Enable usage of the DPC Stack during DPCs.
- Enable usage of the DPC Stack during Fast System Calls and put back the correct push/pop code in FASTCALL_PROLOG.

Modified:
    trunk/reactos/ntoskrnl/include/internal/i386/asmmacro.S
    trunk/reactos/ntoskrnl/ke/i386/kiinit.c
    trunk/reactos/ntoskrnl/ke/i386/trap.s
    trunk/reactos/ntoskrnl/ke/krnlinit.c

Modified: trunk/reactos/ntoskrnl/include/internal/i386/asmmacro.S
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/include/internal/i...
==============================================================================
--- trunk/reactos/ntoskrnl/include/internal/i386/asmmacro.S (original)
+++ trunk/reactos/ntoskrnl/include/internal/i386/asmmacro.S Tue Mar 20 00:53:38 2007
@@ -699,14 +699,13 @@
 // @remark None.
 //
 .macro FASTCALL_PROLOG Label EndLabel
-    /* Set FS to PCR */
-    //push KGDT_R0_PCR
-    //pop fs
-    mov ecx, KGDT_R0_PCR
-    mov fs, cx

/* Set user selector */
     mov ecx, KGDT_R3_DATA | RPL_MASK
+
+    /* Set FS to PCR */
+    push KGDT_R0_PCR
+    pop fs

/* Set DS/ES to User Selector */
     mov ds, cx

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 Tue Mar 20 00:53:38 2007
@@ -570,7 +570,7 @@
         /* Allocate the DPC Stack */
         DpcStack = MmCreateKernelStack(FALSE);
         if (!DpcStack) KeBugCheckEx(NO_PAGES_AVAILABLE, 1, 0, 0, 0);
-        Prcb->DpcStack = DpcStack;
+        Prcb->DpcStack = (PVOID)((ULONG_PTR)DpcStack + KERNEL_STACK_SIZE);

/* Allocate the IOPM save area. */
         Ki386IopmSaveArea = ExAllocatePoolWithTag(PagedPool,
@@ -715,7 +715,7 @@
     do
     {
         /* Loop until execution can continue */
-        while ((volatile KSPIN_LOCK)KiFreezeExecutionLock == 1);
+        while (*(volatile PKSPIN_LOCK*)&KiFreezeExecutionLock == (PVOID)1);
     } while(InterlockedBitTestAndSet((PLONG)&KiFreezeExecutionLock, 0));

/* Setup CPU-related fields */
@@ -745,17 +745,19 @@
     KfRaiseIrql(HIGH_LEVEL);

/* Align stack and make space for the trap frame and NPX frame */
-    InitialStack &= ~KTRAP_FRAME_ALIGN;
+    InitialStack &= -KTRAP_FRAME_ALIGN;
 #ifdef __GNUC__
+    __asm__ __volatile__("xorl %ebp, %ebp");
     __asm__ __volatile__("movl %0,%%esp" : :"r" (InitialStack));
     __asm__ __volatile__("subl %0,%%esp" : :"r" (NPX_FRAME_LENGTH +
                                                  KTRAP_FRAME_LENGTH +
                                                  KTRAP_FRAME_ALIGN));
     __asm__ __volatile__("push %0" : :"r" (CR0_EM + CR0_TS + CR0_MP));
 #else
+    __asm xor ebp, ebp;
     __asm mov esp, InitialStack;
     __asm sub esp, NPX_FRAME_LENGTH + KTRAP_FRAME_ALIGN + KTRAP_FRAME_LENGTH;
-    __asm push CR0_EM + CR0_TS + CR0_MP
+    __asm push CR0_EM + CR0_TS + CR0_MP;
 #endif

/* Call main kernel initialization */

Modified: trunk/reactos/ntoskrnl/ke/i386/trap.s
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/ke/i386/trap.s?rev...
==============================================================================
--- trunk/reactos/ntoskrnl/ke/i386/trap.s (original)
+++ trunk/reactos/ntoskrnl/ke/i386/trap.s Tue Mar 20 00:53:38 2007
@@ -2165,7 +2165,7 @@

/* Save the stack and switch to the DPC Stack */
     mov edx, esp
-    //mov esp, [ebx+KPCR_PRCB_DPC_STACK]
+    mov esp, [ebx+KPCR_PRCB_DPC_STACK]
     push edx

/* Deliver DPCs */

Modified: trunk/reactos/ntoskrnl/ke/krnlinit.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/ke/krnlinit.c?rev=...
==============================================================================
--- trunk/reactos/ntoskrnl/ke/krnlinit.c (original)
+++ trunk/reactos/ntoskrnl/ke/krnlinit.c Tue Mar 20 00:53:38 2007
@@ -289,6 +289,3 @@
     KiInitMachineDependent();
     return TRUE;
 }
-
-
-