reactos/apps/utils/pice/module/init.c

   1 /*++
   2
   3 Copyright (c) 1998-2001 Klaus P. Gerlicher
   4
   5 Module Name:
   6
   7     init.c
   8
   9 Abstract:
  10
  11     initialisation and cleanup of debugger kernel module
  12
  13 Environment:
  14
  15     Kernel mode only
  16
  17 Author:
  18
  19     Klaus P. Gerlicher
  20
  21 Revision History:
  22
  23     25-Jan-1999:        created
  24     15-Nov-2000:    general cleanup of source files
  25
  26 Copyright notice:
  27
  28   This file may be distributed under the terms of the GNU Public License.
  29
  30 --*/
  31
  32 ////////////////////////////////////////////////////
  33 // INCLUDES
  34 ////
  35 #include "remods.h"
  36 #include "precomp.h"
  37
  38 #include <linux/fs.h>
  39 #include <asm/uaccess.h>
  40 #include <asm/io.h>
  41 #include <asm/delay.h>
  42
  43 ////////////////////////////////////////////////////
  44 // GLOBALS
  45 ULONG ulDoInitialBreak=1;
  46 char szBootParams[1024]="";
  47 char tempInit[256];
  48
  49 //*************************************************************************
  50 // InitPICE()
  51 //
  52 //*************************************************************************
  53 BOOLEAN InitPICE(void)
  54 {
  55     ULONG ulHandleScancode=0,ulHandleKbdEvent=0;
  56         ARGS Args;
  57
  58     ENTER_FUNC();
  59
  60     DPRINT((0,"InitPICE(): trace step 1\n"));
  61     // enable monochrome passthrough on BX type chipset
  62     EnablePassThrough();
  63
  64     DPRINT((0,"InitPICE(): trace step 2\n"));
  65     // now load all symbol files described in /etc/pice.conf
  66     if(!LoadSymbolsFromConfig(FALSE))
  67     {
  68         DPRINT((0,"InitPICE: LoadSymbolsFromConfig() failed\n"));
  69         LEAVE_FUNC();
  70         return FALSE;
  71     }
  72
  73     DPRINT((0,"InitPICE(): trace step 3\n"));
  74     // init the output console
  75         // this might be one of the following depending setup
  76         // a) monochrome card
  77         // b) serial terminal (TODO)
  78     if(!ConsoleInit())
  79     {
  80         DPRINT((0,"InitPICE: ConsoleInit() failed\n"));
  81         UnloadSymbols();
  82         LEAVE_FUNC();
  83         return FALSE;
  84     }
  85
  86     DPRINT((0,"InitPICE(): trace step 4\n"));
  87     // print the initial screen template
  88     PrintTemplate();
  89
  90     DPRINT((0,"InitPICE(): trace step 5\n"));
  91         // ask the user if he wants to abort the debugger load
  92     if(!CheckLoadAbort())
  93         {
  94                 Print(OUTPUT_WINDOW,"pICE: ABORT (abort by user)\n");
  95         UnloadSymbols();
  96                 ConsoleShutdown();
  97         LEAVE_FUNC();
  98                 return FALSE;
  99         }
 100
 101     DPRINT((0,"InitPICE(): trace step 6\n"));
 102     // get kernel mm_struct
 103     my_init_mm = GetInitMm();
 104     if(!my_init_mm)
 105         {
 106                 Print(OUTPUT_WINDOW,"pICE: ABORT (initial memory map not found)\n");
 107                 Print(OUTPUT_WINDOW,"pICE: press any key to continue...\n");
 108         while(!GetKeyPolled());
 109         UnloadSymbols();
 110                 ConsoleShutdown();
 111         LEAVE_FUNC();
 112                 return FALSE;
 113         }
 114     DPRINT((0,"init_mm @ %X\n",my_init_mm));
 115
 116     DPRINT((0,"InitPICE(): trace step 7\n"));
 117     // load the file /boot/System.map.
 118     // !!! It must be consistent with the current kernel at all cost!!!
 119     if(!LoadExports())
 120     {
 121                 Print(OUTPUT_WINDOW,"pICE: failed to load exports\n");
 122         Print(OUTPUT_WINDOW,"press any key to continue...\n");
 123         while(!GetKeyPolled());
 124         UnloadSymbols();
 125                 ConsoleShutdown();
 126         LEAVE_FUNC();
 127                 return FALSE;
 128     }
 129
 130     DPRINT((0,"InitPICE(): trace step 8\n"));
 131     // end of the kernel
 132     ScanExports("_end",(PULONG)&kernel_end);
 133     if(!kernel_end)
 134         {
 135                 Print(OUTPUT_WINDOW,"pICE: ABORT (kernel size is unknown)\n");
 136                 Print(OUTPUT_WINDOW,"pICE: press any key to continue...\n");
 137         while(!GetKeyPolled());
 138                 UnloadExports();
 139         UnloadSymbols();
 140                 ConsoleShutdown();
 141         LEAVE_FUNC();
 142                 return FALSE;
 143         }
 144
 145     DPRINT((0,"InitPICE(): trace step 9\n"));
 146     // the loaded module list
 147     ScanExports("module_list",(PULONG)&pmodule_list);
 148     if(!pmodule_list)
 149         {
 150                 Print(OUTPUT_WINDOW,"pICE: ABORT (couldn't retreive kernel module list)\n");
 151                 Print(OUTPUT_WINDOW,"pICE: press any key to continue...\n");
 152         while(!GetKeyPolled());
 153                 UnloadExports();
 154         UnloadSymbols();
 155                 ConsoleShutdown();
 156         LEAVE_FUNC();
 157                 return FALSE;
 158         }
 159
 160     DPRINT((0,"InitPICE(): trace step 10\n"));
 161     // setup a fake module struct for use by symbol routines
 162     if(!InitFakeKernelModule())
 163         {
 164                 Print(OUTPUT_WINDOW,"pICE: ABORT (couldn't initialize kernel module)\n");
 165                 Print(OUTPUT_WINDOW,"pICE: press any key to continue...\n");
 166         while(!GetKeyPolled());
 167                 UnloadExports();
 168         UnloadSymbols();
 169                 ConsoleShutdown();
 170         LEAVE_FUNC();
 171                 return FALSE;
 172         }
 173
 174     DPRINT((0,"InitPICE(): trace step 11\n"));
 175     // do a sanity check on exports
 176     if(!SanityCheckExports())
 177     {
 178                 Print(OUTPUT_WINDOW,"pICE: ABORT (exports are conflicting with kernel symbols)\n");
 179                 Print(OUTPUT_WINDOW,"pICE: press any key to continue...\n");
 180         while(!GetKeyPolled());
 181                 UnloadExports();
 182         UnloadSymbols();
 183                 ConsoleShutdown();
 184         LEAVE_FUNC();
 185                 return FALSE;
 186     }
 187
 188     DPRINT((0,"InitPICE(): trace step 12\n"));
 189
 190
 191     DPRINT((0,"InitPICE(): trace step 13\n"));
 192     // patch the keyboard driver
 193
 194         if(PatchKeyboardDriver())
 195         {
 196                 Print(OUTPUT_WINDOW,"pICE: ABORT (couldn't patch keyboard driver)\n");
 197                 Print(OUTPUT_WINDOW,"pICE: press any key to continue...\n");
 198         while(!GetKeyPolled());
 199                 UnloadSymbols();
 200                 UnloadExports();
 201                 ConsoleShutdown();
 202         LEAVE_FUNC();
 203                 return FALSE;
 204         }
 205
 206     DPRINT((0,"InitPICE(): trace step 14\n"));
 207     // partial init of shadow registers
 208     CurrentCS = GLOBAL_CODE_SEGMENT;
 209     CurrentEIP = (ULONG)RealIsr;
 210
 211     CurrentDS = CurrentSS = GLOBAL_DATA_SEGMENT;
 212     __asm__("
 213             mov %%esp,%%eax
 214             mov %%eax,CurrentESP
 215             ":::"eax");
 216
 217
 218     // display version and symbol information
 219     Ver(NULL);
 220
 221     // disable HW breakpoints
 222         __asm__("
 223                 xorl %%eax,%%eax
 224                 mov %%eax,%%dr6
 225                 mov %%eax,%%dr7
 226         mov %%dr0,%%eax
 227         mov %%dr1,%%eax
 228         mov %%dr2,%%eax
 229         mov %%dr3,%%eax"
 230                 :::"eax"
 231                 );
 232
 233     DPRINT((0,"InitPICE(): trace step 15\n"));
 234     TakeIdtSnapshot();
 235
 236     DPRINT((0,"InitPICE(): trace step 16\n"));
 237     // install all hooks
 238     InstallTraceHook();
 239     InstallGlobalKeyboardHook();
 240     InstallSyscallHook();
 241     InstallInt3Hook();
 242     InstallPrintkHook();
 243     InstallDblFltHook();
 244     InstallGPFaultHook();
 245     InstallIntEHook();
 246
 247     DPRINT((0,"InitPICE(): trace step 16\n"));
 248     if(ulDoInitialBreak)
 249     {
 250         DPRINT((0,"about to do initial break...\n"));
 251
 252         // simulate an initial break
 253         __asm__("
 254             pushfl
 255             pushl %cs
 256             pushl $initialreturnpoint
 257             pushl $" STR(REASON_CTRLF) "
 258             jmp NewInt31Handler
 259 initialreturnpoint:");
 260     }
 261     else
 262     {
 263         // display register contents
 264         DisplayRegs();
 265
 266         // display data window
 267         Args.Value[0]=CurrentDS;
 268         Args.Value[1]=CurrentEIP;
 269         Args.Count=2;
 270         DisplayMemory(&Args);
 271
 272         // disassembly from current address
 273         Args.Value[0]=CurrentCS;
 274         Args.Value[1]=CurrentEIP;
 275         Args.Count=2;
 276         Unassemble(&Args);
 277     }
 278
 279     DPRINT((0,"InitPICE(): trace step 17\n"));
 280         InitPiceRunningTimer();
 281
 282     LEAVE_FUNC();
 283     return TRUE;
 284 }
 285
 286 //*************************************************************************
 287 // CleanUpPICE()
 288 //
 289 //*************************************************************************
 290 void CleanUpPICE(void)
 291 {
 292     DPRINT((0,"CleanUpPICE(): trace step 1\n"));
 293         RemovePiceRunningTimer();
 294
 295     DPRINT((0,"CleanUpPICE(): trace step 2\n"));
 296     // de-install all hooks
 297     DeInstallGlobalKeyboardHook();
 298     DeInstallSyscallHook();
 299     DeInstallInt3Hook();
 300     DeInstallPrintkHook();
 301     DeInstallDblFltHook();
 302     DeInstallGPFaultHook();
 303     DeInstallIntEHook();
 304     DeInstallTraceHook();
 305
 306     DPRINT((0,"CleanUpPICE(): trace step 3\n"));
 307     RestoreIdt();
 308
 309     DPRINT((0,"CleanUpPICE(): trace step 4\n"));
 310     UnloadExports(); // don't use ScanExports() after this
 311     UnloadSymbols();
 312
 313     DPRINT((0,"CleanUpPICE(): trace step 5\n"));
 314     // restore patch of keyboard driver
 315     RestoreKeyboardDriver();
 316
 317     DPRINT((0,"CleanUpPICE(): trace step 6\n"));
 318     Print(OUTPUT_WINDOW,"pICE: shutting down...\n");
 319
 320     DPRINT((0,"CleanUpPICE(): trace step 7\n"));
 321     // cleanup the console
 322         ConsoleShutdown();
 323 }