freeldr/freeldr/arch/i386/i386trap.S

   1 /*
   2  *  FreeLoader
   3  *  Copyright (C) 1998-2002  Brian Palmer  <brianp@sginet.com>
   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         .text
  21         .code16
  22
  23 #define ASM
  24 #include <arch.h>
  25 #include <version.h>
  26
  27 #define SCREEN_ATTR 0x1f                        /* Bright white on blue background */
  28
  29 .macro SAVE_CPU_REGS
  30         movl    %eax,i386_EAX
  31         movl    %ebx,i386_EBX
  32         movl    %ecx,i386_ECX
  33         movl    %edx,i386_EDX
  34         movl    %esp,i386_ESP
  35         movl    %ebp,i386_EBP
  36         movl    %esi,i386_ESI
  37         movl    %edi,i386_EDI
  38         movw    %ds,%ax
  39         movw    %ax,i386_DS
  40         movw    %es,%ax
  41         movw    %ax,i386_ES
  42         movw    %fs,%ax
  43         movw    %ax,i386_FS
  44         movw    %gs,%ax
  45         movw    %ax,i386_GS
  46         movw    %ss,%ax
  47         movw    %ax,i386_SS
  48         popl    %eax
  49         movl    %eax,i386_EIP
  50         popl    %eax
  51         movw    %ax,i386_CS
  52         popl    %eax
  53         movl    %eax,i386_EFLAGS
  54         movl    %cr0,%eax
  55         movl    %eax,i386_CR0
  56         //movl  %cr1,%eax
  57         //movl  %eax,i386_CR1
  58         movl    %cr2,%eax
  59         movl    %eax,i386_CR2
  60         movl    %cr3,%eax
  61         movl    %eax,i386_CR3
  62         movl    %dr0,%eax
  63         movl    %eax,i386_DR0
  64         movl    %dr1,%eax
  65         movl    %eax,i386_DR1
  66         movl    %dr2,%eax
  67         movl    %eax,i386_DR2
  68         movl    %dr3,%eax
  69         movl    %eax,i386_DR3
  70         movl    %dr6,%eax
  71         movl    %eax,i386_DR6
  72         movl    %dr7,%eax
  73         movl    %eax,i386_DR7
  74         sgdt    i386_GDTR
  75         sidt    i386_IDTR
  76         sldt    i386_LDTR
  77         str             i386_TR
  78 .endm
  79
  80
  81
  82 i386ExceptionHandlerText:
  83         .ascii "An error occured in FreeLoader\n"
  84         .ascii VERSION
  85         .ascii "\n"
  86         .asciz "Report this error to the ReactOS Development mailing list <ros-dev@reactos.com>\n\n"
  87
  88 i386DivideByZeroText:
  89         .asciz "Exception 00: DIVIDE BY ZERO\n\n"
  90 i386DebugExceptionText:
  91         .asciz "Exception 01: DEBUG EXCEPTION\n\n"
  92 i386NMIExceptionText:
  93         .asciz "Exception 02: NON-MASKABLE INTERRUPT EXCEPTION\n\n"
  94 i386BreakpointText:
  95         .asciz "Exception 03: BREAKPOINT (INT 3)\n\n"
  96 i386OverflowText:
  97         .asciz "Exception 04: OVERFLOW\n\n"
  98 i386BoundExceptionText:
  99         .asciz "Exception 05: BOUND EXCEPTION\n\n"
 100 i386InvalidOpcodeText:
 101         .asciz "Exception 06: INVALID OPCODE\n\n"
 102 i386FPUNotAvailableText:
 103         .asciz "Exception 07: FPU NOT AVAILABLE\n\n"
 104 i386DoubleFaultText:
 105         .asciz "Exception 08: DOUBLE FAULT\n\n"
 106 i386CoprocessorSegmentText:
 107         .asciz "Exception 09: COPROCESSOR SEGMENT OVERRUN\n\n"
 108 i386InvalidTSSText:
 109         .asciz "Exception 0A: INVALID TSS\n\n"
 110 i386SegmentNotPresentText:
 111         .asciz "Exception 0B: SEGMENT NOT PRESENT\n\n"
 112 i386StackExceptionText:
 113         .asciz "Exception 0C: STACK EXCEPTION\n\n"
 114 i386GeneralProtectionFaultText:
 115         .asciz "Exception 0D: GENERAL PROTECTION FAULT\n\n"
 116 i386PageFaultText:
 117         .asciz "Exception 0E: PAGE FAULT\n\n"
 118 i386CoprocessorErrorText:
 119         .asciz "Exception 10: COPROCESSOR ERROR\n\n"
 120 i386AlignmentCheckText:
 121         .asciz "Exception 11: ALIGNMENT CHECK\n\n"
 122 i386MachineCheckText:
 123         .asciz "Exception 12: MACHINE CHECK\n\n"
 124
 125 i386_EAX_Text:
 126         .asciz "EAX: "
 127 i386_EBX_Text:
 128         .asciz "EBX: "
 129 i386_ECX_Text:
 130         .asciz "ECX: "
 131 i386_EDX_Text:
 132         .asciz "EDX: "
 133 i386_ESP_Text:
 134         .asciz "        ESP: "
 135 i386_EBP_Text:
 136         .asciz "        EBP: "
 137 i386_ESI_Text:
 138         .asciz "        ESI: "
 139 i386_EDI_Text:
 140         .asciz "        EDI: "
 141 i386_CS_Text:
 142         .asciz "CS: "
 143 i386_DS_Text:
 144         .asciz "DS: "
 145 i386_ES_Text:
 146         .asciz "ES: "
 147 i386_FS_Text:
 148         .asciz "FS: "
 149 i386_GS_Text:
 150         .asciz "GS: "
 151 i386_SS_Text:
 152         .asciz "SS: "
 153 i386_EFLAGS_Text:
 154         .asciz "        EFLAGS: "
 155 i386_EIP_Text:
 156         .asciz "        EIP: "
 157 i386_ERROR_CODE_Text:
 158         .asciz "        ERROR CODE: "
 159 i386_CR0_Text:
 160         .asciz "        CR0: "
 161 i386_CR1_Text:
 162         .asciz "        CR1: "
 163 i386_CR2_Text:
 164         .asciz "        CR2: "
 165 i386_CR3_Text:
 166         .asciz "        CR3: "
 167 i386_DR0_Text:
 168         .asciz "        DR0: "
 169 i386_DR1_Text:
 170         .asciz "        DR1: "
 171 i386_DR2_Text:
 172         .asciz "        DR2: "
 173 i386_DR3_Text:
 174         .asciz "        DR3: "
 175 i386_DR6_Text:
 176         .asciz "        DR6: "
 177 i386_DR7_Text:
 178         .asciz "        DR7: "
 179 i386_GDTR_Text:
 180         .asciz "        GDTR Base: "
 181 i386_IDTR_Text:
 182         .asciz "        IDTR Base: "
 183 i386_Limit_Text:
 184         .asciz " Limit: "
 185 i386_LDTR_Text:
 186         .asciz "        LDTR: "
 187 i386_TR_Text:
 188         .asciz " TR: "
 189
 190 i386FramesText:
 191         .asciz "Frames:\n"
 192
 193 /* Set by each exception handler to the address of the description text */
 194 i386ExceptionDescriptionText:
 195         .long   0
 196
 197 /* Used to store the contents of all the registers when an exception occurs */
 198 i386_EAX:
 199         .long   0
 200 i386_EBX:
 201         .long   0
 202 i386_ECX:
 203         .long   0
 204 i386_EDX:
 205         .long   0
 206 i386_ESP:
 207         .long   0
 208 i386_EBP:
 209         .long   0
 210 i386_ESI:
 211         .long   0
 212 i386_EDI:
 213         .long   0
 214 i386_CS:
 215         .word   0
 216 i386_DS:
 217         .word   0
 218 i386_ES:
 219         .word   0
 220 i386_FS:
 221         .word   0
 222 i386_GS:
 223         .word   0
 224 i386_SS:
 225         .word   0
 226 i386_EFLAGS:
 227         .long   0
 228 i386_EIP:
 229         .long   0
 230 i386_ERROR_CODE:
 231         .long   0
 232 i386_CR0:
 233         .long   0
 234 i386_CR1:
 235         .long   0
 236 i386_CR2:
 237         .long   0
 238 i386_CR3:
 239         .long   0
 240 i386_DR0:
 241         .long   0
 242 i386_DR1:
 243         .long   0
 244 i386_DR2:
 245         .long   0
 246 i386_DR3:
 247         .long   0
 248 i386_DR6:
 249         .long   0
 250 i386_DR7:
 251         .long   0
 252 i386_GDTR:
 253         .word   0
 254         .long   0
 255 i386_IDTR:
 256         .word   0
 257         .long   0
 258 i386_LDTR:
 259         .word   0
 260 i386_TR:
 261         .word   0
 262
 263 /* Used to store the current X and Y position on the screen */
 264 i386_ScreenPosX:
 265         .long   0
 266 i386_ScreenPosY:
 267         .long   0
 268
 269 /************************************************************************/
 270 i386CommonExceptionHandler:
 271         .code32
 272
 273         SAVE_CPU_REGS
 274
 275         pushl   $SCREEN_ATTR
 276         call    _MachVideoClearScreen
 277         add     $4,%esp
 278
 279         movl    $i386ExceptionHandlerText,%esi
 280         call    i386PrintText
 281
 282         movl    i386ExceptionDescriptionText,%esi
 283         call    i386PrintText
 284
 285         movl    $i386_EAX_Text,%esi
 286         call    i386PrintText
 287         movl    i386_EAX,%eax
 288         call    i386PrintHexDword                                       // Display EAX
 289         movl    $i386_ESP_Text,%esi
 290         call    i386PrintText
 291         movl    i386_ESP,%eax
 292         call    i386PrintHexDword                                       // Display ESP
 293         movl    $i386_CR0_Text,%esi
 294         call    i386PrintText
 295         movl    i386_CR0,%eax
 296         call    i386PrintHexDword                                       // Display CR0
 297         movl    $i386_DR0_Text,%esi
 298         call    i386PrintText
 299         movl    i386_DR0,%eax
 300         call    i386PrintHexDword                                       // Display DR0
 301         movl    $0,i386_ScreenPosX
 302         incl    i386_ScreenPosY
 303         movl    $i386_EBX_Text,%esi
 304         call    i386PrintText
 305         movl    i386_EBX,%eax
 306         call    i386PrintHexDword                                       // Display EBX
 307         movl    $i386_EBP_Text,%esi
 308         call    i386PrintText
 309         movl    i386_EBP,%eax
 310         call    i386PrintHexDword                                       // Display EBP
 311         movl    $i386_CR1_Text,%esi
 312         call    i386PrintText
 313         movl    i386_CR1,%eax
 314         call    i386PrintHexDword                                       // Display CR1
 315         movl    $i386_DR1_Text,%esi
 316         call    i386PrintText
 317         movl    i386_DR1,%eax
 318         call    i386PrintHexDword                                       // Display DR1
 319         movl    $0,i386_ScreenPosX
 320         incl    i386_ScreenPosY
 321         movl    $i386_ECX_Text,%esi
 322         call    i386PrintText
 323         movl    i386_ECX,%eax
 324         call    i386PrintHexDword                                       // Display ECX
 325         movl    $i386_ESI_Text,%esi
 326         call    i386PrintText
 327         movl    i386_ESI,%eax
 328         call    i386PrintHexDword                                       // Display ESI
 329         movl    $i386_CR2_Text,%esi
 330         call    i386PrintText
 331         movl    i386_CR2,%eax
 332         call    i386PrintHexDword                                       // Display CR2
 333         movl    $i386_DR2_Text,%esi
 334         call    i386PrintText
 335         movl    i386_DR2,%eax
 336         call    i386PrintHexDword                                       // Display DR2
 337         movl    $0,i386_ScreenPosX
 338         incl    i386_ScreenPosY
 339         movl    $i386_EDX_Text,%esi
 340         call    i386PrintText
 341         movl    i386_EDX,%eax
 342         call    i386PrintHexDword                                       // Display EDX
 343         movl    $i386_EDI_Text,%esi
 344         call    i386PrintText
 345         movl    i386_EDI,%eax
 346         call    i386PrintHexDword                                       // Display EDI
 347         movl    $i386_CR3_Text,%esi
 348         call    i386PrintText
 349         movl    i386_CR3,%eax
 350         call    i386PrintHexDword                                       // Display CR3
 351         movl    $i386_DR3_Text,%esi
 352         call    i386PrintText
 353         movl    i386_DR3,%eax
 354         call    i386PrintHexDword                                       // Display DR3
 355         incl    i386_ScreenPosY
 356         movl    $55,i386_ScreenPosX
 357         movl    $i386_DR6_Text,%esi
 358         call    i386PrintText
 359         movl    i386_DR6,%eax
 360         call    i386PrintHexDword                                       // Display DR6
 361         incl    i386_ScreenPosY
 362         movl    $55,i386_ScreenPosX
 363         movl    $i386_DR7_Text,%esi
 364         call    i386PrintText
 365         movl    i386_DR7,%eax
 366         call    i386PrintHexDword                                       // Display DR7
 367         movl    $0,i386_ScreenPosX
 368         incl    i386_ScreenPosY
 369         incl    i386_ScreenPosY
 370         movl    $i386_CS_Text,%esi
 371         call    i386PrintText
 372         movw    i386_CS,%ax
 373         call    i386PrintHexWord                                        // Display CS
 374         movl    $i386_EIP_Text,%esi
 375         call    i386PrintText
 376         movl    i386_EIP,%eax
 377         call    i386PrintHexDword                                       // Display EIP
 378         movl    $0,i386_ScreenPosX
 379         incl    i386_ScreenPosY
 380         movl    $i386_DS_Text,%esi
 381         call    i386PrintText
 382         movw    i386_DS,%ax
 383         call    i386PrintHexWord                                        // Display DS
 384         movl    $i386_ERROR_CODE_Text,%esi
 385         call    i386PrintText
 386         movl    i386_ERROR_CODE,%eax
 387         call    i386PrintHexDword                                       // Display ERROR CODE
 388         movl    $0,i386_ScreenPosX
 389         incl    i386_ScreenPosY
 390         movl    $i386_ES_Text,%esi
 391         call    i386PrintText
 392         movw    i386_ES,%ax
 393         call    i386PrintHexWord                                        // Display ES
 394         movl    $i386_EFLAGS_Text,%esi
 395         call    i386PrintText
 396         movl    i386_EFLAGS,%eax
 397         call    i386PrintHexDword                                       // Display EFLAGS
 398         movl    $0,i386_ScreenPosX
 399         incl    i386_ScreenPosY
 400         movl    $i386_FS_Text,%esi
 401         call    i386PrintText
 402         movw    i386_FS,%ax
 403         call    i386PrintHexWord                                        // Display FS
 404         movl    $i386_GDTR_Text,%esi
 405         call    i386PrintText
 406         movl    i386_GDTR+2,%eax
 407         call    i386PrintHexDword                                       // Display GDTR Base
 408         movl    $i386_Limit_Text,%esi
 409         call    i386PrintText
 410         movw    i386_GDTR,%ax
 411         call    i386PrintHexWord                                        // Display GDTR Limit
 412         movl    $0,i386_ScreenPosX
 413         incl    i386_ScreenPosY
 414         movl    $i386_GS_Text,%esi
 415         call    i386PrintText
 416         movw    i386_GS,%ax
 417         call    i386PrintHexWord                                        // Display GS
 418         movl    $i386_IDTR_Text,%esi
 419         call    i386PrintText
 420         movl    i386_IDTR+2,%eax
 421         call    i386PrintHexDword                                       // Display IDTR Base
 422         movl    $i386_Limit_Text,%esi
 423         call    i386PrintText
 424         movw    i386_IDTR,%ax
 425         call    i386PrintHexWord                                        // Display IDTR Limit
 426         movl    $0,i386_ScreenPosX
 427         incl    i386_ScreenPosY
 428         movl    $i386_SS_Text,%esi
 429         call    i386PrintText
 430         movw    i386_SS,%ax
 431         call    i386PrintHexWord                                        // Display SS
 432         movl    $i386_LDTR_Text,%esi
 433         call    i386PrintText
 434         movw    i386_LDTR,%ax
 435         call    i386PrintHexWord                                        // Display LDTR
 436         movl    $i386_TR_Text,%esi
 437         call    i386PrintText
 438         movw    i386_TR,%ax
 439         call    i386PrintHexWord                                        // Display TR
 440         movl    $0,i386_ScreenPosX
 441         incl    i386_ScreenPosY
 442         incl    i386_ScreenPosY
 443         call    i386PrintFrames                                         // Display frames
 444         incl    i386_ScreenPosY
 445         incl    i386_ScreenPosY
 446
 447         cli
 448 i386ExceptionHandlerHang:
 449         hlt
 450         jmp     i386ExceptionHandlerHang
 451
 452         iret
 453
 454 i386PrintFrames:
 455         movl    $0,i386_ScreenPosX
 456         movl    $i386FramesText,%esi
 457         call    i386PrintText
 458
 459         movl    i386_EBP,%edi
 460 printnextframe:
 461         test    %edi,%edi
 462         je      nomoreframes
 463         movl    $STACK32ADDR,%eax
 464         cmpl    %edi,%eax
 465         jbe     nomoreframes
 466         movl    4(%edi),%eax
 467         pushl   %edi
 468         call    i386PrintHexDword                                       // Display frame
 469         popl    %edi
 470         incl    i386_ScreenPosX
 471         incl    i386_ScreenPosX
 472         movl    0(%edi),%edi
 473         jmp     printnextframe
 474 nomoreframes:
 475         ret
 476
 477 /************************************************************************/
 478 /* AL = Char to display                                                 */
 479 /************************************************************************/
 480 i386PrintChar:
 481         .code32
 482
 483         pushl   i386_ScreenPosY
 484         pushl   i386_ScreenPosX
 485         pushl   $SCREEN_ATTR
 486         andl    $0xff,%eax
 487         pushl   %eax
 488         call    _MachVideoPutChar
 489         addl    $16,%esp
 490
 491         ret
 492
 493 /************************************************************************/
 494 /* ESI = Address of text to display                                     */
 495 /************************************************************************/
 496 i386PrintText:
 497         .code32
 498
 499 i386PrintTextLoop:
 500         lodsb
 501
 502         // Check for end of string char
 503         cmp     $0,%al
 504         je      i386PrintTextDone
 505
 506         // Check for newline char
 507         cmp     $0x0a,%al
 508         jne     i386PrintTextLoop2
 509         incl    i386_ScreenPosY
 510         movl    $0,i386_ScreenPosX
 511         jmp     i386PrintTextLoop
 512
 513 i386PrintTextLoop2:
 514         call    i386PrintChar
 515         incl    i386_ScreenPosX
 516
 517         jmp     i386PrintTextLoop
 518
 519 i386PrintTextDone:
 520
 521         ret
 522
 523 /************************************************************************/
 524 /* Prints the value in EAX on the screen in hex                         */
 525 /************************************************************************/
 526 i386PrintHexDword:
 527         .code32
 528
 529         call    i386PrintHex1
 530
 531 i386PrintHex1:
 532         call    i386PrintHex2
 533 i386PrintHex2:
 534         call    i386PrintHex3
 535 i386PrintHex3:
 536         movb    $4,%cl
 537         rol             %cl,%eax
 538         push    %eax
 539         andb    $0x0f,%al
 540         movl    $i386PrintHexTable,%ebx
 541         xlat    /*$i386PrintHexTable*/
 542         call    i386PrintChar
 543         incl    i386_ScreenPosX
 544         pop             %eax
 545
 546         ret
 547
 548 i386PrintHexTable:
 549         .ascii  "0123456789ABCDEF"
 550
 551 /************************************************************************/
 552 /* Prints the value in AX on the screen in hex                         */
 553 /************************************************************************/
 554 i386PrintHexWord:
 555         .code32
 556
 557         call    i386PrintHexWord1
 558 i386PrintHexWord1:
 559         call    i386PrintHexWord2
 560 i386PrintHexWord2:
 561         movb    $4,%cl
 562         rol             %cl,%ax
 563         push    %eax
 564         andb    $0x0f,%al
 565         movl    $i386PrintHexTable,%ebx
 566         xlat    /*$i386PrintHexTable*/
 567         call    i386PrintChar
 568         incl    i386_ScreenPosX
 569         pop     %eax
 570
 571         ret
 572
 573 /************************************************************************/
 574 /* Prints the value in AL on the screen in hex                         */
 575 /************************************************************************/
 576 i386PrintHexByte:
 577         .code32
 578
 579         call    i386PrintHexByte1
 580 i386PrintHexByte1:
 581         movb    $4,%cl
 582         rol             %cl,%al
 583         push    %eax
 584         andb    $0x0f,%al
 585         movl    $i386PrintHexTable,%ebx
 586         xlat    /*$i386PrintHexTable*/
 587         call    i386PrintChar
 588         incl    i386_ScreenPosX
 589         pop             %eax
 590
 591         ret
 592
 593 /************************************************************************/
 594 EXTERN(i386DivideByZero)
 595         .code32
 596
 597         movl    $i386DivideByZeroText,i386ExceptionDescriptionText
 598         jmp             i386CommonExceptionHandler
 599
 600 /************************************************************************/
 601 EXTERN(i386DebugException)
 602         .code32
 603
 604         movl    $i386DebugExceptionText,i386ExceptionDescriptionText
 605         jmp             i386CommonExceptionHandler
 606
 607 /************************************************************************/
 608 EXTERN(i386NMIException)
 609         .code32
 610
 611         movl    $i386NMIExceptionText,i386ExceptionDescriptionText
 612         jmp             i386CommonExceptionHandler
 613
 614 /************************************************************************/
 615 EXTERN(i386Breakpoint)
 616         .code32
 617
 618         movl    $i386BreakpointText,i386ExceptionDescriptionText
 619         jmp             i386CommonExceptionHandler
 620
 621 /************************************************************************/
 622 EXTERN(i386Overflow)
 623         .code32
 624
 625         movl    $i386OverflowText,i386ExceptionDescriptionText
 626         jmp             i386CommonExceptionHandler
 627
 628 /************************************************************************/
 629 EXTERN(i386BoundException)
 630         .code32
 631
 632         movl    $i386BoundExceptionText,i386ExceptionDescriptionText
 633         jmp             i386CommonExceptionHandler
 634
 635 /************************************************************************/
 636 EXTERN(i386InvalidOpcode)
 637         .code32
 638
 639         movl    $i386InvalidOpcodeText,i386ExceptionDescriptionText
 640         jmp             i386CommonExceptionHandler
 641
 642 /************************************************************************/
 643 EXTERN(i386FPUNotAvailable)
 644         .code32
 645
 646         movl    $i386FPUNotAvailableText,i386ExceptionDescriptionText
 647         jmp             i386CommonExceptionHandler
 648
 649 /************************************************************************/
 650 EXTERN(i386DoubleFault)
 651         .code32
 652
 653         popl    %eax
 654         movl    %eax,i386_ERROR_CODE
 655
 656         movl    $i386DoubleFaultText,i386ExceptionDescriptionText
 657         jmp             i386CommonExceptionHandler
 658
 659 /************************************************************************/
 660 EXTERN(i386CoprocessorSegment)
 661         .code32
 662
 663         movl    $i386CoprocessorSegmentText,i386ExceptionDescriptionText
 664         jmp             i386CommonExceptionHandler
 665
 666 /************************************************************************/
 667 EXTERN(i386InvalidTSS)
 668         .code32
 669
 670         popl    %eax
 671         movl    %eax,i386_ERROR_CODE
 672
 673         movl    $i386InvalidTSSText,i386ExceptionDescriptionText
 674         jmp             i386CommonExceptionHandler
 675
 676 /************************************************************************/
 677 EXTERN(i386SegmentNotPresent)
 678         .code32
 679
 680         popl    %eax
 681         movl    %eax,i386_ERROR_CODE
 682
 683         movl    $i386SegmentNotPresentText,i386ExceptionDescriptionText
 684         jmp             i386CommonExceptionHandler
 685
 686 /************************************************************************/
 687 EXTERN(i386StackException)
 688         .code32
 689
 690         popl    %eax
 691         movl    %eax,i386_ERROR_CODE
 692
 693         movl    $i386StackExceptionText,i386ExceptionDescriptionText
 694         jmp             i386CommonExceptionHandler
 695
 696 /************************************************************************/
 697 EXTERN(i386GeneralProtectionFault)
 698         .code32
 699
 700         popl    %eax
 701         movl    %eax,i386_ERROR_CODE
 702
 703         movl    $i386GeneralProtectionFaultText,i386ExceptionDescriptionText
 704         jmp             i386CommonExceptionHandler
 705
 706 /************************************************************************/
 707 EXTERN(i386PageFault)
 708         .code32
 709
 710         popl    %eax
 711         movl    %eax,i386_ERROR_CODE
 712
 713         movl    $i386PageFaultText,i386ExceptionDescriptionText
 714         jmp             i386CommonExceptionHandler
 715
 716 /************************************************************************/
 717 EXTERN(i386CoprocessorError)
 718         .code32
 719
 720         movl    $i386CoprocessorErrorText,i386ExceptionDescriptionText
 721         jmp             i386CommonExceptionHandler
 722
 723 /************************************************************************/
 724 EXTERN(i386AlignmentCheck)
 725         .code32
 726
 727         movl    $i386AlignmentCheckText,i386ExceptionDescriptionText
 728         jmp             i386CommonExceptionHandler
 729
 730 /************************************************************************/
 731 EXTERN(i386MachineCheck)
 732         .code32
 733
 734         movl    $i386MachineCheckText,i386ExceptionDescriptionText
 735         jmp             i386CommonExceptionHandler
 736
 737 /************************************************************************
 738  * DEBUGGING SUPPORT FUNCTIONS
 739  ************************************************************************/
 740 EXTERN(_INSTRUCTION_BREAKPOINT1)
 741         .code32
 742
 743         pushl   %eax
 744
 745         movl    8(%esp),%eax
 746
 747         movl    %eax,%dr0
 748         movl    %dr7,%eax
 749         andl    $0xfff0ffff,%eax
 750         orl             $0x00000303,%eax
 751         movl    %eax,%dr7
 752
 753         popl    %eax
 754
 755         ret
 756
 757 EXTERN(_MEMORY_READWRITE_BREAKPOINT1)
 758         .code32
 759
 760         pushl   %eax
 761
 762         movl    8(%esp),%eax
 763
 764         movl    %eax,%dr0
 765         movl    %dr7,%eax
 766         andl    $0xfff0ffff,%eax
 767         orl             $0x00030303,%eax
 768         movl    %eax,%dr7
 769
 770         popl    %eax
 771
 772         ret
 773
 774 EXTERN(_MEMORY_WRITE_BREAKPOINT1)
 775         .code32
 776
 777         pushl   %eax
 778
 779         movl    8(%esp),%eax
 780
 781         movl    %eax,%dr0
 782         movl    %dr7,%eax
 783         andl    $0xfff0ffff,%eax
 784         orl             $0x00010303,%eax
 785         movl    %eax,%dr7
 786
 787         popl    %eax
 788
 789         ret
 790
 791 EXTERN(_INSTRUCTION_BREAKPOINT2)
 792         .code32
 793
 794         pushl   %eax
 795
 796         movl    8(%esp),%eax
 797
 798         movl    %eax,%dr1
 799         movl    %dr7,%eax
 800         andl    $0xff0fffff,%eax
 801         orl             $0x0000030c,%eax
 802         movl    %eax,%dr7
 803
 804         popl    %eax
 805
 806         ret
 807
 808 EXTERN(_MEMORY_READWRITE_BREAKPOINT2)
 809         .code32
 810
 811         pushl   %eax
 812
 813         movl    8(%esp),%eax
 814
 815         movl    %eax,%dr1
 816         movl    %dr7,%eax
 817         andl    $0xff0fffff,%eax
 818         orl             $0x0030030c,%eax
 819         movl    %eax,%dr7
 820
 821         popl    %eax
 822
 823         ret
 824
 825 EXTERN(_MEMORY_WRITE_BREAKPOINT2)
 826         .code32
 827
 828         pushl   %eax
 829
 830         movl    8(%esp),%eax
 831
 832         movl    %eax,%dr1
 833         movl    %dr7,%eax
 834         andl    $0xff0fffff,%eax
 835         orl             $0x0010030c,%eax
 836         movl    %eax,%dr7
 837
 838         popl    %eax
 839
 840         ret
 841
 842 EXTERN(_INSTRUCTION_BREAKPOINT3)
 843         .code32
 844
 845         pushl   %eax
 846
 847         movl    8(%esp),%eax
 848
 849         movl    %eax,%dr2
 850         movl    %dr7,%eax
 851         andl    $0xf0ffffff,%eax
 852         orl             $0x00000330,%eax
 853         movl    %eax,%dr7
 854
 855         popl    %eax
 856
 857         ret
 858
 859 EXTERN(_MEMORY_READWRITE_BREAKPOINT3)
 860         .code32
 861
 862         pushl   %eax
 863
 864         movl    8(%esp),%eax
 865
 866         movl    %eax,%dr2
 867         movl    %dr7,%eax
 868         andl    $0xf0ffffff,%eax
 869         orl             $0x03000330,%eax
 870         movl    %eax,%dr7
 871
 872         popl    %eax
 873
 874         ret
 875
 876 EXTERN(_MEMORY_WRITE_BREAKPOINT3)
 877         .code32
 878
 879         pushl   %eax
 880
 881         movl    8(%esp),%eax
 882
 883         movl    %eax,%dr2
 884         movl    %dr7,%eax
 885         andl    $0xf0ffffff,%eax
 886         orl             $0x01000330,%eax
 887         movl    %eax,%dr7
 888
 889         popl    %eax
 890
 891         ret
 892
 893 EXTERN(_INSTRUCTION_BREAKPOINT4)
 894         .code32
 895
 896         pushl   %eax
 897
 898         movl    8(%esp),%eax
 899
 900         movl    %eax,%dr3
 901         movl    %dr7,%eax
 902         andl    $0x0fffffff,%eax
 903         orl             $0x000003c0,%eax
 904         movl    %eax,%dr7
 905
 906         popl    %eax
 907
 908         ret
 909
 910 EXTERN(_MEMORY_READWRITE_BREAKPOINT4)
 911         .code32
 912
 913         pushl   %eax
 914
 915         movl    8(%esp),%eax
 916
 917         movl    %eax,%dr3
 918         movl    %dr7,%eax
 919         andl    $0x0fffffff,%eax
 920         orl             $0x300003c0,%eax
 921         movl    %eax,%dr7
 922
 923         popl    %eax
 924
 925         ret
 926
 927 EXTERN(_MEMORY_WRITE_BREAKPOINT4)
 928         .code32
 929
 930         pushl   %eax
 931
 932         movl    8(%esp),%eax
 933
 934         movl    %eax,%dr3
 935         movl    %dr7,%eax
 936         andl    $0x0fffffff,%eax
 937         orl             $0x100003c0,%eax
 938         movl    %eax,%dr7
 939
 940         popl    %eax
 941
 942         ret