reactos/ntoskrnl/ke/i386/usertrap.c

   1 /*
   2  *  ReactOS kernel
   3  *  Copyright (C) 1998, 1999, 2000, 2001 ReactOS Team
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19 /*
  20  * PROJECT:              ReactOS kernel
  21  * FILE:                 ntoskrnl/ke/i386/usertrap.c
  22  * PURPOSE:              Handling usermode exceptions.
  23  * PROGRAMMER:           David Welch (welch@cwcom.net)
  24  * REVISION HISTORY:
  25  *              18/11/01: Split from ntoskrnl/ke/i386/exp.c
  26  */
  27
  28 /* INCLUDES *****************************************************************/
  29
  30 #include <ddk/ntddk.h>
  31 #include <roscfg.h>
  32 #include <internal/ntoskrnl.h>
  33 #include <internal/ke.h>
  34 #include <internal/i386/segment.h>
  35 #include <internal/i386/mm.h>
  36 #include <internal/module.h>
  37 #include <internal/mm.h>
  38 #include <internal/ps.h>
  39 #include <internal/trap.h>
  40 #include <ntdll/ldr.h>
  41 #include <internal/safe.h>
  42
  43 #define NDEBUG
  44 #include <internal/debug.h>
  45
  46 /* FUNCTIONS ****************************************************************/
  47
  48 BOOLEAN
  49 print_user_address(PVOID address)
  50 {
  51    PLIST_ENTRY current_entry;
  52    PLDR_MODULE current;
  53    PEPROCESS CurrentProcess;
  54    PPEB Peb = NULL;
  55    ULONG_PTR RelativeAddress;
  56    PPEB_LDR_DATA Ldr;
  57    NTSTATUS Status;
  58
  59    CurrentProcess = PsGetCurrentProcess();
  60    if (NULL != CurrentProcess)
  61      {
  62        Peb = CurrentProcess->Peb;
  63      }
  64
  65    if (NULL == Peb)
  66      {
  67        DbgPrint("<%x>", address);
  68        return(TRUE);
  69      }
  70
  71    Status = MmSafeCopyFromUser(&Ldr, &Peb->Ldr, sizeof(PPEB_LDR_DATA));
  72    if (!NT_SUCCESS(Status))
  73      {
  74        DbgPrint("<%x>", address);
  75        return(TRUE);
  76      }
  77    current_entry = Ldr->InLoadOrderModuleList.Flink;
  78
  79    while (current_entry != &Ldr->InLoadOrderModuleList &&
  80           current_entry != NULL)
  81      {
  82         current =
  83           CONTAINING_RECORD(current_entry, LDR_MODULE, InLoadOrderModuleList);
  84
  85         if (address >= (PVOID)current->BaseAddress &&
  86             address < (PVOID)(current->BaseAddress + current->SizeOfImage))
  87           {
  88             RelativeAddress =
  89               (ULONG_PTR) address - (ULONG_PTR)current->BaseAddress;
  90             DbgPrint("<%wZ: %x>", &current->BaseDllName, RelativeAddress);
  91             return(TRUE);
  92           }
  93
  94         current_entry = current_entry->Flink;
  95      }
  96    return(FALSE);
  97 }
  98
  99 ULONG
 100 KiUserTrapHandler(PKTRAP_FRAME Tf, ULONG ExceptionNr, PVOID Cr2)
 101 {
 102   EXCEPTION_RECORD Er;
 103
 104   if (ExceptionNr == 0)
 105     {
 106       Er.ExceptionCode = STATUS_INTEGER_DIVIDE_BY_ZERO;
 107     }
 108   else if (ExceptionNr == 1)
 109     {
 110       Er.ExceptionCode = STATUS_SINGLE_STEP;
 111     }
 112   else if (ExceptionNr == 3)
 113     {
 114       Er.ExceptionCode = STATUS_BREAKPOINT;
 115     }
 116   else if (ExceptionNr == 4)
 117     {
 118       Er.ExceptionCode = STATUS_INTEGER_OVERFLOW;
 119     }
 120   else if (ExceptionNr == 5)
 121     {
 122       Er.ExceptionCode = STATUS_ARRAY_BOUNDS_EXCEEDED;
 123     }
 124   else if (ExceptionNr == 6)
 125     {
 126       Er.ExceptionCode = STATUS_ILLEGAL_INSTRUCTION;
 127     }
 128   else
 129     {
 130       Er.ExceptionCode = STATUS_ACCESS_VIOLATION;
 131     }
 132   Er.ExceptionFlags = 0;
 133   Er.ExceptionRecord = NULL;
 134   Er.ExceptionAddress = (PVOID)Tf->Eip;
 135   if (ExceptionNr == 14)
 136     {
 137       Er.NumberParameters = 2;
 138       Er.ExceptionInformation[0] = Tf->ErrorCode & 0x1;
 139       Er.ExceptionInformation[1] = (ULONG)Cr2;
 140     }
 141   else
 142     {
 143       Er.NumberParameters = 0;
 144     }
 145
 146
 147   Er.ExceptionFlags = ((NTSTATUS) STATUS_SINGLE_STEP == (NTSTATUS) Er.ExceptionCode ||
 148     (NTSTATUS) STATUS_BREAKPOINT == (NTSTATUS) Er.ExceptionCode) ?
 149     EXCEPTION_NONCONTINUABLE : 0;
 150
 151   KiDispatchException(&Er, 0, Tf, UserMode, TRUE);
 152   return(0);
 153 }