[sginsberg] 47487: [NTOS] Re-enable the APC debug check in the system call exit code that somehow got removed in 46247. [NTOS] Use an inline for emitting the iret instruction in C code for portability. [NTOS] Simplify the MSC assembly in KiSwitchToBootStack.

Author: sginsberg
Date: Mon May 31 14:52:16 2010
New Revision: 47487

URL: http://svn.reactos.org/svn/reactos?rev=47487&view=rev
Log:
[NTOS] Re-enable the APC debug check in the system call exit code that somehow got removed in 46247.
[NTOS] Use an inline for emitting the iret instruction in C code for portability.
[NTOS] Simplify the MSC assembly in KiSwitchToBootStack.

Modified:
    trunk/reactos/ntoskrnl/include/internal/i386/ke.h
    trunk/reactos/ntoskrnl/include/internal/trap_x.h
    trunk/reactos/ntoskrnl/ke/i386/traphdlr.c

Modified: trunk/reactos/ntoskrnl/include/internal/i386/ke.h
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/include/internal/i...
==============================================================================
--- trunk/reactos/ntoskrnl/include/internal/i386/ke.h [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/include/internal/i386/ke.h [iso-8859-1] Mon May 31 14:52:16 2010
@@ -774,8 +774,7 @@
     VOID NTAPI KiSystemStartupBootStack(VOID);
     __asm
     {
-        mov ecx, InitialStack
-        mov esp, ecx
+        mov esp, InitialStack
         sub esp, (NPX_FRAME_LENGTH + KTRAP_FRAME_ALIGN + KTRAP_FRAME_LENGTH)
         push (CR0_EM | CR0_TS | CR0_MP)
         jmp KiSystemStartupBootStack
@@ -786,6 +785,30 @@
 }

//
+// Emits the iret instruction for C code
+//
+DECLSPEC_NORETURN
+VOID
+FORCEINLINE
+KiIret(VOID)
+{
+#if defined(__GNUC__)
+    __asm__ __volatile__
+    (
+        "iret\n"
+    );
+#elif defined(_MSC_VER)
+    __asm
+    {
+        iret
+    }
+#else
+#error Unsupported compiler
+#endif
+    UNREACHABLE;
+}
+
+//
 // Normally this is done by the HAL, but on x86 as an optimization, the kernel
 // initiates the end by calling back into the HAL and exiting the trap here.
 //

Modified: trunk/reactos/ntoskrnl/include/internal/trap_x.h
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/include/internal/t...
==============================================================================
--- trunk/reactos/ntoskrnl/include/internal/trap_x.h [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/include/internal/trap_x.h [iso-8859-1] Mon May 31 14:52:16 2010
@@ -8,7 +8,7 @@

#pragma once

-//#define TRAP_DEBUG 1
+#define TRAP_DEBUG 0

//
 // Unreachable code hint for GCC 4.5.x, older GCC versions, and MSVC
@@ -81,7 +81,7 @@
     DbgPrint("V86Gs: %x\n", TrapFrame->V86Gs);
 }

-#ifdef TRAP_DEBUG
+#if TRAP_DEBUG
 VOID
 FORCEINLINE
 KiFillTrapFrameDebug(IN PKTRAP_FRAME TrapFrame)
@@ -168,7 +168,7 @@
                          0,
                          0);
         }
-#if 0
+
         /* Make sure we're not attached and that APCs are not disabled */
         if ((KeGetCurrentThread()->ApcStateIndex != CurrentApcEnvironment) ||
             (KeGetCurrentThread()->CombinedApcDisable != 0))
@@ -180,7 +180,6 @@
                          KeGetCurrentThread()->CombinedApcDisable,
                          0);
         }
-#endif
     }
 }
 #else
@@ -200,9 +199,11 @@
 DECLSPEC_NORETURN VOID FASTCALL KiTrapReturnNoSegments(IN PKTRAP_FRAME TrapFrame);

typedef
-VOID
-(FASTCALL
-*PFAST_SYSTEM_CALL_EXIT)(IN PKTRAP_FRAME TrapFrame);
+DECLSPEC_NORETURN
+VOID
+(FASTCALL *PFAST_SYSTEM_CALL_EXIT)(
+    IN PKTRAP_FRAME TrapFrame
+);

extern PFAST_SYSTEM_CALL_EXIT KiFastCallExitHandler;

@@ -222,7 +223,7 @@
     while (TRUE)
     {
         /* Return if this isn't V86 mode anymore */
-        if (!(TrapFrame->EFlags & EFLAGS_V86_MASK)) KiEoiHelper(TrapFrame);;
+        if (!(TrapFrame->EFlags & EFLAGS_V86_MASK)) KiEoiHelper(TrapFrame);

/* Turn off the alerted state for kernel mode */
         Thread->Alerted[KernelMode] = FALSE;

Modified: trunk/reactos/ntoskrnl/ke/i386/traphdlr.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/ke/i386/traphdlr.c...
==============================================================================
--- trunk/reactos/ntoskrnl/ke/i386/traphdlr.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/ke/i386/traphdlr.c [iso-8859-1] Mon May 31 14:52:16 2010
@@ -547,7 +547,7 @@
         //
         // Handled, return from interrupt
         //
-        __asm__ __volatile__ ("iret\n");
+        KiIret();
     }

//