reactos/ntoskrnl/ps/i386/continue.c

   1 /* $Id: continue.c,v 1.5 2004/08/15 16:39:11 chorns Exp $
   2  *
   3  * COPYRIGHT:              See COPYING in the top level directory
   4  * PROJECT:                ReactOS kernel
   5  * FILE:                   ntoskrnl/ps/i386/continue.c
   6  * PURPOSE:                i386 implementation of NtContinue()
   7  * PROGRAMMER:             Royce Mitchell III, kjk_hyperion
   8  * REVISION HISTORY:
   9  *               29/06/04: Created
  10  */
  11
  12 /* INCLUDES ****************************************************************/
  13
  14 #include <ntoskrnl.h>
  15 #define NDEBUG
  16 #include <internal/debug.h>
  17
  18 VOID
  19 FASTCALL
  20 KeRosTrapReturn ( PKTRAP_FRAME TrapFrame, PKTRAP_FRAME PrevTrapFrame );
  21
  22 VOID STDCALL
  23 KeRosDumpStackFrames ( PULONG Frame, ULONG FrameCount );
  24
  25 /*
  26  * @implemented
  27  */
  28 NTSTATUS STDCALL
  29 NtContinue (
  30         IN PCONTEXT Context,
  31         IN BOOLEAN TestAlert)
  32 {
  33         PKTRAP_FRAME TrapFrame = KeGetCurrentThread()->TrapFrame;
  34         PKTRAP_FRAME PrevTrapFrame = (PKTRAP_FRAME)TrapFrame->Edx;
  35
  36         DPRINT("NtContinue: Context: Eip=0x%x, Esp=0x%x\n", Context->Eip, Context->Esp );
  37         PULONG Frame = 0;
  38         __asm__("mov %%ebp, %%ebx" : "=b" (Frame) : );
  39         DPRINT( "NtContinue(): Ebp=%x, prev/TF=%x/%x\n", Frame, Frame[0], TrapFrame );
  40 #ifndef NDEBUG
  41         KeRosDumpStackFrames(NULL,5);
  42 #endif
  43
  44         if ( Context == NULL )
  45         {
  46                 DPRINT1("NtContinue called with NULL Context\n");
  47                 return STATUS_INVALID_PARAMETER;
  48         }
  49
  50         if ( TrapFrame == NULL )
  51         {
  52                 CPRINT("NtContinue called but TrapFrame was NULL\n");
  53                 KEBUGCHECK(0);
  54         }
  55
  56         /*
  57         * Copy the supplied context over the register information that was saved
  58         * on entry to kernel mode, it will then be restored on exit
  59         * FIXME: Validate the context
  60         */
  61         KeContextToTrapFrame ( Context, TrapFrame );
  62
  63         KeRosTrapReturn ( TrapFrame, PrevTrapFrame );
  64
  65         return STATUS_SUCCESS; /* this doesn't actually happen b/c KeRosTrapReturn() won't return */
  66 }