reactos/ntoskrnl/ps/i386/continue.c

   1 /* $Id: continue.c,v 1.1 2004/07/02 00:47:57 royce 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 <ddk/ntddk.h>
  15 #include <internal/ke.h>
  16 #include <internal/ob.h>
  17 #include <internal/ps.h>
  18 #include <internal/ob.h>
  19 #include <internal/pool.h>
  20 #include <ntos/minmax.h>
  21 #include <internal/ldr.h>
  22 #include <rosrtl/string.h>
  23
  24 #define NDEBUG
  25 #include <internal/debug.h>
  26
  27 #if 1
  28 VOID
  29 FASTCALL
  30 KeRosTrapReturn ( PKTRAP_FRAME TrapFrame, PKTRAP_FRAME PrevTrapFrame );
  31
  32 VOID STDCALL
  33 KeRosDumpStackFrames ( PULONG Frame, ULONG FrameCount );
  34
  35 /*
  36  * @implemented
  37  */
  38 NTSTATUS STDCALL
  39 NtContinue (
  40         IN PCONTEXT Context,
  41         IN BOOLEAN TestAlert)
  42 {
  43         PKTRAP_FRAME TrapFrame = KeGetCurrentThread()->TrapFrame;
  44         PKTRAP_FRAME PrevTrapFrame = (PKTRAP_FRAME)TrapFrame->Edx;
  45
  46         DPRINT1("NtContinue: Context: Eip=0x%x, Esp=0x%x\n", Context->Eip, Context->Esp );
  47         PULONG Frame = 0;
  48         __asm__("mov %%ebp, %%ebx" : "=b" (Frame) : );
  49         DbgPrint ( "NtContinue(): Ebp=%x, prev/TF=%x/%x\n", Frame, Frame[0], TrapFrame );
  50         KeRosDumpStackFrames(NULL,5);
  51
  52         if ( Context == NULL )
  53         {
  54                 DPRINT1("NtContinue called with NULL Context\n");
  55                 return STATUS_INVALID_PARAMETER;
  56         }
  57
  58         if ( TrapFrame == NULL )
  59         {
  60                 CPRINT("NtContinue called but TrapFrame was NULL\n");
  61                 KEBUGCHECK(0);
  62         }
  63
  64         /*
  65         * Copy the supplied context over the register information that was saved
  66         * on entry to kernel mode, it will then be restored on exit
  67         * FIXME: Validate the context
  68         */
  69         KeContextToTrapFrame ( Context, TrapFrame );
  70
  71         KeRosTrapReturn ( TrapFrame, PrevTrapFrame );
  72
  73         return STATUS_SUCCESS; /* this doesn't actually happen b/c KeRosTrapReturn() won't return */
  74 }
  75 #else
  76 NTSTATUS STDCALL
  77 NtContinue (
  78         IN PCONTEXT Context,
  79         IN BOOLEAN TestAlert)
  80 {
  81         PKTRAP_FRAME TrapFrame = KeGetCurrentThread()->TrapFrame;
  82         PULONG Frame = 0;
  83         __asm__("mov %%ebp, %%ebx" : "=b" (Frame) : );
  84         DbgPrint ( "NtContinue(): Ebp=%x, prev/TF=%x/%x\n", Frame, Frame[0], TrapFrame );
  85
  86         /*
  87          * Copy the supplied context over the register information that was saved
  88          * on entry to kernel mode, it will then be restored on exit
  89          * FIXME: Validate the context
  90          */
  91         if ( TrapFrame == NULL )
  92         {
  93                 CPRINT("NtContinue called but TrapFrame was NULL\n");
  94                 KEBUGCHECK(0);
  95         }
  96         KeContextToTrapFrame ( Context, TrapFrame );
  97         return(STATUS_SUCCESS);
  98 }
  99 #endif