reactos/ntoskrnl/ke/i386/trap.s

   1 /*
   2  *  ReactOS kernel
   3  *  Copyright (C) 2000 David Welch <welch@cwcom.net>
   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 /* $Id$
  20  *
  21  * PROJECT:         ReactOS kernel
  22  * FILE:            ntoskrnl/ke/i386/trap.s
  23  * PURPOSE:         Exception handlers
  24  * PROGRAMMER:      David Welch <welch@cwcom.net>
  25  */
  26
  27 /* INCLUDES ******************************************************************/
  28
  29 #include <roscfg.h>
  30 #include <ddk/status.h>
  31 #include <internal/i386/ke.h>
  32 #include <internal/i386/segment.h>
  33 #include <internal/ps.h>
  34 #include <ddk/defines.h>
  35
  36 /* FUNCTIONS *****************************************************************/
  37
  38 /*
  39  * Epilog for exception handlers
  40  */
  41 _KiTrapEpilog:
  42         cmpl    $1, %eax       /* Check for v86 recovery */
  43         jne     _KiTrapRet
  44         jmp     _KiV86Complete
  45 _KiTrapRet:
  46         /* Skip debug information and unsaved registers */
  47         addl    $0x18, %esp
  48         popl    %eax            /* Dr0 */
  49         movl    %eax, %dr0
  50         popl    %eax            /* Dr1 */
  51         movl    %eax, %dr1
  52         popl    %eax            /* Dr2 */
  53         movl    %eax, %dr2
  54         popl    %eax            /* Dr3 */
  55         movl    %eax, %dr3
  56         popl    %eax            /* Dr6 */
  57         movl    %eax, %dr6
  58         popl    %eax            /* Dr7 */
  59         movl    %eax, %dr7
  60         popl    %gs
  61         popl    %es
  62         popl    %ds
  63         popl    %edx
  64         popl    %ecx
  65         popl    %eax
  66
  67         /* Restore the old previous mode */
  68         popl    %ebx
  69         movb    %bl, %ss:KTHREAD_PREVIOUS_MODE(%esi)
  70
  71         /* Restore the old exception handler list */
  72         popl    %ebx
  73         movl    %ebx, %fs:KPCR_EXCEPTION_LIST
  74
  75         popl    %fs
  76         popl    %edi
  77         popl    %esi
  78         popl    %ebx
  79         popl    %ebp
  80         addl    $0x4, %esp  /* Ignore error code */
  81
  82         iret
  83
  84 .globl _KiTrapProlog
  85 _KiTrapProlog:
  86
  87         pushl   %edi
  88         pushl   %fs
  89
  90         /*
  91          * Check that the PCR exists, very early in the boot process it may
  92          * not
  93          */
  94         cmpl    $0, %ss:_KiPcrInitDone
  95         je      .L5
  96
  97         /* Load the PCR selector into fs */
  98         movl    $PCR_SELECTOR, %ebx
  99         movl    %ebx, %fs
 100
 101         /* Save the old exception list */
 102         movl    %fs:KPCR_EXCEPTION_LIST, %ebx
 103         pushl   %ebx
 104
 105         /* Get a pointer to the current thread */
 106         movl    %fs:KPCR_CURRENT_THREAD, %edi
 107
 108         /* The current thread may be NULL early in the boot process */
 109         cmpl    $0, %edi
 110         je      .L4
 111
 112         /* Save the old previous mode */
 113         movl    $0, %ebx
 114         movb    %ss:KTHREAD_PREVIOUS_MODE(%edi), %bl
 115         pushl   %ebx
 116
 117         /* Set the new previous mode based on the saved CS selector */
 118         movl     0x24(%esp), %ebx
 119         andl     $0x0000FFFF, %ebx
 120         cmpl     $KERNEL_CS, %ebx
 121         jne      .L1
 122         movb     $KernelMode, %ss:KTHREAD_PREVIOUS_MODE(%edi)
 123         jmp      .L3
 124 .L1:
 125         movb     $UserMode, %ss:KTHREAD_PREVIOUS_MODE(%edi)
 126 .L3:
 127
 128         /* Save other registers */
 129         pushl   %eax
 130         pushl   %ecx
 131         pushl   %edx
 132         pushl   %ds
 133         pushl   %es
 134         pushl   %gs
 135         movl    %dr7, %eax
 136         pushl   %eax            /* Dr7 */
 137         /* Clear all breakpoint enables in dr7. */
 138         andl    $0xFFFF0000, %eax
 139         movl    %eax, %dr7
 140         movl    %dr6, %eax
 141         pushl   %eax            /* Dr6 */
 142         movl    %dr3, %eax
 143         pushl   %eax            /* Dr3 */
 144         movl    %dr2, %eax
 145         pushl   %eax            /* Dr2 */
 146         movl    %dr1, %eax
 147         pushl   %eax            /* Dr1 */
 148         movl    %dr0, %eax
 149         pushl   %eax            /* Dr0 */
 150     leal    0x64(%esp), %eax
 151         pushl   %eax    /* XXX: TempESP */
 152         pushl   %ss     /* XXX: TempSS */
 153         pushl   $0     /* XXX: DebugPointer */
 154         pushl   $0     /* XXX: DebugArgMark */
 155         movl    0x60(%esp), %ebx
 156         pushl   %ebx   /* XXX: DebugEIP */
 157         pushl   %ebp   /* XXX: DebugEBP */
 158
 159         /* Load the segment registers */
 160         movl    $KERNEL_DS, %ebx
 161         movl    %ebx, %ds
 162         movl    %ebx, %es
 163         movl    %ebx, %gs
 164
 165         /*  Set ES to kernel segment  */
 166         movw    $KERNEL_DS,%bx
 167         movw    %bx,%es
 168
 169         movl    %esp, %ebx
 170         movl    %esp, %ebp
 171
 172         /* Save the old trap frame. */
 173         cmpl    $0, %edi
 174         je      .L7
 175         movl    %ss:KTHREAD_TRAP_FRAME(%edi), %edx
 176         pushl   %edx
 177         jmp     .L8
 178 .L7:
 179         pushl   $0
 180 .L8:
 181
 182         /* Save a pointer to the trap frame in the current KTHREAD */
 183         cmpl    $0, %edi
 184         je      .L6
 185         movl    %ebx, %ss:KTHREAD_TRAP_FRAME(%edi)
 186 .L6:
 187
 188         /* Call the C exception handler */
 189         pushl   %esi
 190         pushl   %ebx
 191         call    _KiTrapHandler
 192         addl    $4, %esp
 193         addl    $4, %esp
 194
 195         /* Get a pointer to the current thread */
 196         movl    %fs:KPCR_CURRENT_THREAD, %esi
 197
 198         /* Restore the old trap frame pointer */
 199         popl    %ebx
 200         movl    %ebx, KTHREAD_TRAP_FRAME(%esi)
 201
 202         /* Return to the caller */
 203         jmp     _KiTrapEpilog
 204
 205         /* Handle the no-pcr case out of line */
 206 .L5:
 207         pushl   $0
 208
 209         /* Handle the no-thread case out of line */
 210 .L4:
 211         pushl   $0
 212         jmp     .L3
 213
 214 .globl _KiTrap0
 215 _KiTrap0:
 216         /* No error code */
 217         pushl   $0
 218         pushl   %ebp
 219         pushl   %ebx
 220         pushl   %esi
 221         movl    $0, %esi
 222         jmp     _KiTrapProlog
 223
 224 .globl _KiTrap1
 225 _KiTrap1:
 226         /* No error code */
 227         pushl   $0
 228         pushl   %ebp
 229         pushl   %ebx
 230         pushl   %esi
 231         movl    $1, %esi
 232         jmp     _KiTrapProlog
 233
 234 .globl _KiTrap2
 235 _KiTrap2:
 236         pushl   $0
 237         pushl   %ebp
 238         pushl   %ebx
 239         pushl   %esi
 240         movl    $2, %esi
 241         jmp     _KiTrapProlog
 242
 243 .globl _KiTrap3
 244 _KiTrap3:
 245         pushl   $0
 246         pushl   %ebp
 247         pushl   %ebx
 248         pushl   %esi
 249         movl    $3, %esi
 250         jmp     _KiTrapProlog
 251
 252 .globl _KiTrap4
 253 _KiTrap4:
 254         pushl   $0
 255         pushl   %ebp
 256         pushl   %ebx
 257         pushl   %esi
 258         movl    $4, %esi
 259         jmp     _KiTrapProlog
 260
 261 .globl _KiTrap5
 262 _KiTrap5:
 263         pushl   $0
 264         pushl   %ebp
 265         pushl   %ebx
 266         pushl   %esi
 267         movl    $5, %esi
 268         jmp     _KiTrapProlog
 269
 270 .globl _KiTrap6
 271 _KiTrap6:
 272         pushl   $0
 273         pushl   %ebp
 274         pushl   %ebx
 275         pushl   %esi
 276         movl    $6, %esi
 277         jmp     _KiTrapProlog
 278
 279 .globl _KiTrap7
 280 _KiTrap7:
 281         pushl   $0
 282         pushl   %ebp
 283         pushl   %ebx
 284         pushl   %esi
 285         movl    $7, %esi
 286         jmp     _KiTrapProlog
 287
 288 .globl _KiTrap8
 289 _KiTrap8:
 290         call    _KiDoubleFaultHandler
 291         iret
 292
 293 .globl _KiTrap9
 294 _KiTrap9:
 295         pushl   $0
 296         pushl   %ebp
 297         pushl   %ebx
 298         pushl   %esi
 299         movl    $9, %esi
 300         jmp     _KiTrapProlog
 301
 302 .globl _KiTrap10
 303 _KiTrap10:
 304         pushl   %ebp
 305         pushl   %ebx
 306         pushl   %esi
 307         movl    $10, %esi
 308         jmp     _KiTrapProlog
 309
 310 .globl _KiTrap11
 311 _KiTrap11:
 312         pushl   %ebp
 313         pushl   %ebx
 314         pushl   %esi
 315         movl    $11, %esi
 316         jmp     _KiTrapProlog
 317
 318 .globl _KiTrap12
 319 _KiTrap12:
 320         pushl   %ebp
 321         pushl   %ebx
 322         pushl   %esi
 323         movl    $12, %esi
 324         jmp     _KiTrapProlog
 325
 326 .globl _KiTrap13
 327 _KiTrap13:
 328         pushl   %ebp
 329         pushl   %ebx
 330         pushl   %esi
 331         movl    $13, %esi
 332         jmp     _KiTrapProlog
 333
 334 .globl _KiTrap14
 335 _KiTrap14:
 336         pushl   %ebp
 337         pushl   %ebx
 338         pushl   %esi
 339         movl    $14, %esi
 340         jmp     _KiTrapProlog
 341
 342 .globl _KiTrap15
 343 _KiTrap15:
 344         pushl   $0
 345         pushl   %ebp
 346         pushl   %ebx
 347         pushl   %esi
 348         movl    $15, %esi
 349         jmp     _KiTrapProlog
 350
 351 .globl _KiTrap16
 352 _KiTrap16:
 353         pushl   $0
 354         pushl   %ebp
 355         pushl   %ebx
 356         pushl   %esi
 357         movl    $16, %esi
 358         jmp     _KiTrapProlog
 359
 360 .globl _KiTrap17
 361 _KiTrap17:
 362         pushl   $0
 363         pushl   %ebp
 364         pushl   %ebx
 365         pushl   %esi
 366         movl    $17, %esi
 367         jmp     _KiTrapProlog
 368
 369 .globl _KiTrap18
 370 _KiTrap18:
 371         pushl   $0
 372         pushl   %ebp
 373         pushl   %ebx
 374         pushl   %esi
 375         movl    $18, %esi
 376         jmp     _KiTrapProlog
 377
 378 .globl _KiTrap19
 379 _KiTrap19:
 380         pushl   $0
 381         pushl   %ebp
 382         pushl   %ebx
 383         pushl   %esi
 384         movl    $19, %esi
 385         jmp     _KiTrapProlog
 386
 387 .globl _KiTrapUnknown
 388 _KiTrapUnknown:
 389         pushl   $0
 390         pushl   %ebp
 391         pushl   %ebx
 392         pushl   %esi
 393         movl    $255, %esi
 394         jmp     _KiTrapProlog
 395
 396
 397 /* EOF */