DuetPkg/BootSector/efi64.S

   1 #------------------------------------------------------------------------------
   2 #*
   3 #*   Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
   4 #*   This program and the accompanying materials
   5 #*   are licensed and made available under the terms and conditions of the BSD License
   6 #*   which accompanies this distribution.  The full text of the license may be found at
   7 #*   http://opensource.org/licenses/bsd-license.php
   8 #*
   9 #*   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 #*   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11 #*
  12 #*    efi64.asm
  13 #*
  14 #*   Abstract:
  15 #*
  16 #------------------------------------------------------------------------------
  17
  18 ##############################################################################
  19 # Now in 64-bit long mode.
  20 ##############################################################################
  21
  22         .486:
  23         .stack:
  24         .code:
  25         .org 0x21000
  26
  27 .global _start
  28 _start:
  29
  30 .equ                 DEFAULT_HANDLER_SIZE, INT1 - INT0
  31
  32 .macro jmpCommonIdtEntry
  33     # jmp     commonIdtEntry - this must be hand coded to keep the assembler from
  34     #                          using a 8 bit reletive jump when the entries are
  35     #                          within 255 bytes of the common entry.  This must
  36     #                          be done to maintain the consistency of the size
  37     #                          of entry points...
  38     .byte   0xe9                     # jmp 16 bit relative
  39     .long   commonIdtEntry - . - 4   # offset to jump to
  40 .endm
  41
  42
  43 Start:
  44
  45     movl    $0x001fffe8,%esp # make final stack aligned
  46
  47     # set OSFXSR and OSXMMEXCPT because some code will use XMM register
  48     .byte 0xf
  49     .byte 0x20
  50     .byte 0xe0
  51 #    mov rax, cr4
  52     btsl $9,%eax
  53     btsl $0xa,%eax
  54     .byte 0xf
  55     .byte 0x22
  56     .byte 0xe0
  57 #    mov cr4, rax
  58
  59     call    ClearScreen
  60
  61     # Populate IDT with meaningful offsets for exception handlers...
  62     sidt    Idtr
  63
  64
  65     movl    Halt, %eax
  66     movl    %eax,%ebx                   # use bx to copy 15..0 to descriptors
  67     shrl    $16,%eax                    # use ax to copy 31..16 to descriptors
  68                                         # 63..32 of descriptors is 0
  69     movl    $0x78,%ecx                  # 78h IDT entries to initialize with unique entry points (exceptions)
  70     movl    (Idtr + 2), %esi
  71     movl    (%esi),%edi
  72
  73 LOOP_1:                                         # loop through all IDT entries exception handlers and initialize to default handler
  74     movw    %bx, (%edi)                         # write bits 15..0 of offset
  75     movw    $0x38, 2(%edi)                      # SYS_CODE_SEL64 from GDT
  76     movw    $(0x0e00 | 0x8000), 4(%edi)         # type = 386 interrupt gate, present
  77     movw    %ax, 6(%edi)                        # write bits 31..16 of offset
  78     movl    $0, 8(%edi)                         # write bits 31..16 of offset
  79     addl    $16, %edi                           # move up to next descriptor
  80     addw    DEFAULT_HANDLER_SIZE, %bx           # move to next entry point
  81     loopl   LOOP_1                              # loop back through again until all descriptors are initialized
  82
  83     ## at this point edi contains the offset of the descriptor for INT 20
  84     ## and bx contains the low 16 bits of the offset of the default handler
  85     ## so initialize all the rest of the descriptors with these two values...
  86 #    mov     ecx, 101                            ; there are 100 descriptors left (INT 20 (14h) - INT 119 (77h)
  87 #@@:                                             ; loop through all IDT entries exception handlers and initialize to default handler
  88 #    mov     word ptr [edi], bx                  ; write bits 15..0 of offset
  89 #    mov     word ptr [edi+2], 38h               ; SYS_CODE64_SEL from GDT
  90 #    mov     word ptr [edi+4], 0e00h OR 8000h    ; type = 386 interrupt gate, present
  91 #    mov     word ptr [edi+6], ax                ; write bits 31..16 of offset
  92 #    mov     dword ptr [edi+8], 0                ; write bits 63..32 of offset
  93 #    add     edi, 16                             ; move up to next descriptor
  94 #    loop    @b                                  ; loop back through again until all descriptors are initialized
  95
  96
  97 ##  DUMP    location of IDT and several of the descriptors
  98 #    mov     ecx, 8
  99 #    mov     eax, [offset Idtr + 2]
 100 #    mov     eax, [eax]
 101 #    mov     edi, 0b8000h
 102 #    call    PrintQword
 103 #    mov     esi, eax
 104 #    mov     edi, 0b80a0h
 105 #    jmp     OuterLoop
 106
 107 ##
 108 ## just for fun, let's do a software interrupt to see if we correctly land in the exception handler...
 109 #    mov     eax, 011111111h
 110 #    mov     ebx, 022222222h
 111 #    mov     ecx, 033333333h
 112 #    mov     edx, 044444444h
 113 #    mov     ebp, 055555555h
 114 #    mov     esi, 066666666h
 115 #    mov     edi, 077777777h
 116 #    push    011111111h
 117 #    push    022222222h
 118 #    push    033333333h
 119 #    int     119
 120
 121     movl    $0x22000,%esi               # esi = 22000
 122     movl    0x14(%esi),%eax             # eax = [22014]
 123     addl    %eax,%esi                   # esi = 22000 + [22014] = Base of EFILDR.C
 124     movl    0x3c(%esi),%ebp             # ebp = [22000 + [22014] + 3c] = NT Image Header for EFILDR.C
 125     addl    %esi,%ebp
 126     movl    0x30(%ebp),%edi             # edi = [[22000 + [22014] + 3c] + 2c] = ImageBase (63..32 is zero, ignore)
 127     movl    0x28(%ebp),%eax             # eax = [[22000 + [22014] + 3c] + 24] = EntryPoint
 128     addl    %edi,%eax                   # eax = ImageBase + EntryPoint
 129     movl    %ebx, EfiLdrOffset
 130     movl    %eax, (%ebx)                # Modify far jump instruction for correct entry point
 131
 132     movw    6(%ebp), %bx                # bx = Number of sections
 133     xorl    %eax,%eax
 134     movw    0x14(%ebp), %ax             # ax = Optional Header Size
 135     addl    %eax,%ebp
 136     addl    $0x18,%ebp                  # ebp = Start of 1st Section
 137
 138 SectionLoop:
 139     pushl   %esi                        # Save Base of EFILDR.C
 140     pushl   %edi                        # Save ImageBase
 141     addl    0x14(%ebp),%esi             # esi = Base of EFILDR.C + PointerToRawData
 142     addl    0x0c(%ebp),%edi             # edi = ImageBase + VirtualAddress
 143     movl    0x10(%ebp),%ecx             # ecs = SizeOfRawData
 144
 145     cld
 146     shrl    $2,%ecx
 147     rep
 148     movsl
 149
 150     popl    %edi                        # Restore ImageBase
 151     popl    %esi                        # Restore Base of EFILDR.C
 152
 153     addw    $0x28,%bp                   # ebp = ebp + 028h = Pointer to next section record
 154     .byte 0x66
 155     .byte 0xff
 156     .byte 0xcb
 157 #    dec     bx
 158     cmpw    $0,%bx
 159     jne     SectionLoop
 160
 161     movl    (Idtr), %eax                  # get size of IDT
 162     movzx   (%edx), %eax
 163     .byte 0xff
 164     .byte 0xc0
 165 #    inc     eax
 166     addl    2(%edx), %eax                # add to base of IDT to get location of memory map...
 167     xorl    %ecx,%ecx
 168     movl    %eax,%ecx                    # put argument to RCX
 169
 170     .byte 0x48
 171     .byte 0xc7
 172     .byte 0xc0
 173 EfiLdrOffset:
 174     .long 0x00401000                    # Offset of EFILDR
 175 #   mov rax, 401000h
 176     .byte 0x50
 177 #   push rax
 178
 179 # ret
 180     .byte 0xc3
 181
 182 #    db      "**** DEFAULT IDT ENTRY ***",0
 183     .p2align 1
 184 Halt:
 185 INT0:
 186     pushl   $0x0    # push error code place holder on the stack
 187     pushl   $0x0
 188     jmpCommonIdtEntry
 189 #    db      0e9h                        ; jmp 16 bit reletive
 190 #    dd      commonIdtEntry - $ - 4      ;  offset to jump to
 191
 192 INT1:
 193     pushl   $0x0    # push error code place holder on the stack
 194     pushl   $0x1
 195     jmpCommonIdtEntry
 196
 197 INT2:
 198     pushl   $0x0    # push error code place holder on the stack
 199     pushl   $0x2
 200     jmpCommonIdtEntry
 201
 202 INT3:
 203     pushl   $0x0    # push error code place holder on the stack
 204     pushl   $0x3
 205     jmpCommonIdtEntry
 206
 207 INT4:
 208     pushl   $0x0    # push error code place holder on the stack
 209     pushl   $0x4
 210     jmpCommonIdtEntry
 211
 212 INT5:
 213     pushl   $0x0    # push error code place holder on the stack
 214     pushl   $0x5
 215     jmpCommonIdtEntry
 216
 217 INT6:
 218     pushl   $0x0    # push error code place holder on the stack
 219     pushl   $0x6
 220     jmpCommonIdtEntry
 221
 222 INT7:
 223     pushl   $0x0    # push error code place holder on the stack
 224     pushl   $0x7
 225     jmpCommonIdtEntry
 226
 227 INT8:
 228 #   Double fault causes an error code to be pushed so no phony push necessary
 229     nop
 230     nop
 231     pushl   $0x8
 232     jmpCommonIdtEntry
 233
 234 INT9:
 235     pushl   $0x0    # push error code place holder on the stack
 236     pushl   $0x9
 237     jmpCommonIdtEntry
 238
 239 INT10:
 240 #   Invalid TSS causes an error code to be pushed so no phony push necessary
 241     nop
 242     nop
 243     pushl   $10
 244     jmpCommonIdtEntry
 245
 246 INT11:
 247 #   Segment Not Present causes an error code to be pushed so no phony push necessary
 248     nop
 249     nop
 250     pushl   $11
 251     jmpCommonIdtEntry
 252
 253 INT12:
 254 #   Stack fault causes an error code to be pushed so no phony push necessary
 255     nop
 256     nop
 257     pushl   $12
 258     jmpCommonIdtEntry
 259
 260 INT13:
 261 #   GP fault causes an error code to be pushed so no phony push necessary
 262     nop
 263     nop
 264     pushl   $13
 265     jmpCommonIdtEntry
 266
 267 INT14:
 268 #   Page fault causes an error code to be pushed so no phony push necessary
 269     nop
 270     nop
 271     pushl   $14
 272     jmpCommonIdtEntry
 273
 274 INT15:
 275     pushl   $0x0    # push error code place holder on the stack
 276     pushl   $15
 277     jmpCommonIdtEntry
 278
 279 INT16:
 280     pushl   $0x0    # push error code place holder on the stack
 281     pushl   $16
 282     jmpCommonIdtEntry
 283
 284 INT17:
 285 #   Alignment check causes an error code to be pushed so no phony push necessary
 286     nop
 287     nop
 288     pushl   $17
 289     jmpCommonIdtEntry
 290
 291 INT18:
 292     pushl   $0x0    # push error code place holder on the stack
 293     pushl   $18
 294     jmpCommonIdtEntry
 295
 296 INT19:
 297     pushl   $0x0    # push error code place holder on the stack
 298     pushl   $19
 299     jmpCommonIdtEntry
 300
 301 INTUnknown:
 302 # The following segment repeats (0x78 - 20) times:
 303 # No. 1
 304     pushl   $0x0    # push error code place holder on the stack
 305 #    push    xxh     ; push vector number
 306     .byte 0x6a
 307     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 308     jmpCommonIdtEntry
 309 # No. 2
 310     pushl   $0x0    # push error code place holder on the stack
 311 #    push    xxh     ; push vector number
 312     .byte 0x6a
 313     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 314     jmpCommonIdtEntry
 315 # No. 3
 316     pushl   $0x0    # push error code place holder on the stack
 317 #    push    xxh     ; push vector number
 318     .byte 0x6a
 319     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 320     jmpCommonIdtEntry
 321 # No. 4
 322     pushl   $0x0    # push error code place holder on the stack
 323 #    push    xxh     ; push vector number
 324     .byte 0x6a
 325     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 326     jmpCommonIdtEntry
 327 # No. 5
 328     pushl   $0x0    # push error code place holder on the stack
 329 #    push    xxh     ; push vector number
 330     .byte 0x6a
 331     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 332     jmpCommonIdtEntry
 333 # No. 6
 334     pushl   $0x0    # push error code place holder on the stack
 335 #    push    xxh     ; push vector number
 336     .byte 0x6a
 337     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 338     jmpCommonIdtEntry
 339 # No. 7
 340     pushl   $0x0    # push error code place holder on the stack
 341 #    push    xxh     ; push vector number
 342     .byte 0x6a
 343     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 344     jmpCommonIdtEntry
 345 # No. 8
 346     pushl   $0x0    # push error code place holder on the stack
 347 #    push    xxh     ; push vector number
 348     .byte 0x6a
 349     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 350     jmpCommonIdtEntry
 351 # No. 9
 352     pushl   $0x0    # push error code place holder on the stack
 353 #    push    xxh     ; push vector number
 354     .byte 0x6a
 355     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 356     jmpCommonIdtEntry
 357 # No. 10
 358     pushl   $0x0    # push error code place holder on the stack
 359 #    push    xxh     ; push vector number
 360     .byte 0x6a
 361     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 362     jmpCommonIdtEntry
 363 # No. 11
 364     pushl   $0x0    # push error code place holder on the stack
 365 #    push    xxh     ; push vector number
 366     .byte 0x6a
 367     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 368     jmpCommonIdtEntry
 369 # No. 12
 370     pushl   $0x0    # push error code place holder on the stack
 371 #    push    xxh     ; push vector number
 372     .byte 0x6a
 373     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 374     jmpCommonIdtEntry
 375 # No. 13
 376     pushl   $0x0    # push error code place holder on the stack
 377 #    push    xxh     ; push vector number
 378     .byte 0x6a
 379     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 380     jmpCommonIdtEntry
 381 # No. 14
 382     pushl   $0x0    # push error code place holder on the stack
 383 #    push    xxh     ; push vector number
 384     .byte 0x6a
 385     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 386     jmpCommonIdtEntry
 387 # No. 15
 388     pushl   $0x0    # push error code place holder on the stack
 389 #    push    xxh     ; push vector number
 390     .byte 0x6a
 391     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 392     jmpCommonIdtEntry
 393 # No. 16
 394     pushl   $0x0    # push error code place holder on the stack
 395 #    push    xxh     ; push vector number
 396     .byte 0x6a
 397     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 398     jmpCommonIdtEntry
 399 # No. 17
 400     pushl   $0x0    # push error code place holder on the stack
 401 #    push    xxh     ; push vector number
 402     .byte 0x6a
 403     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 404     jmpCommonIdtEntry
 405 # No. 18
 406     pushl   $0x0    # push error code place holder on the stack
 407 #    push    xxh     ; push vector number
 408     .byte 0x6a
 409     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 410     jmpCommonIdtEntry
 411 # No. 19
 412     pushl   $0x0    # push error code place holder on the stack
 413 #    push    xxh     ; push vector number
 414     .byte 0x6a
 415     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 416     jmpCommonIdtEntry
 417 # No. 20
 418     pushl   $0x0    # push error code place holder on the stack
 419 #    push    xxh     ; push vector number
 420     .byte 0x6a
 421     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 422     jmpCommonIdtEntry
 423 # No. 21
 424     pushl   $0x0    # push error code place holder on the stack
 425 #    push    xxh     ; push vector number
 426     .byte 0x6a
 427     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 428     jmpCommonIdtEntry
 429 # No. 22
 430     pushl   $0x0    # push error code place holder on the stack
 431 #    push    xxh     ; push vector number
 432     .byte 0x6a
 433     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 434     jmpCommonIdtEntry
 435 # No. 23
 436     pushl   $0x0    # push error code place holder on the stack
 437 #    push    xxh     ; push vector number
 438     .byte 0x6a
 439     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 440     jmpCommonIdtEntry
 441 # No. 24
 442     pushl   $0x0    # push error code place holder on the stack
 443 #    push    xxh     ; push vector number
 444     .byte 0x6a
 445     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 446     jmpCommonIdtEntry
 447 # No. 25
 448     pushl   $0x0    # push error code place holder on the stack
 449 #    push    xxh     ; push vector number
 450     .byte 0x6a
 451     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 452     jmpCommonIdtEntry
 453 # No. 26
 454     pushl   $0x0    # push error code place holder on the stack
 455 #    push    xxh     ; push vector number
 456     .byte 0x6a
 457     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 458     jmpCommonIdtEntry
 459 # No. 27
 460     pushl   $0x0    # push error code place holder on the stack
 461 #    push    xxh     ; push vector number
 462     .byte 0x6a
 463     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 464     jmpCommonIdtEntry
 465 # No. 28
 466     pushl   $0x0    # push error code place holder on the stack
 467 #    push    xxh     ; push vector number
 468     .byte 0x6a
 469     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 470     jmpCommonIdtEntry
 471 # No. 29
 472     pushl   $0x0    # push error code place holder on the stack
 473 #    push    xxh     ; push vector number
 474     .byte 0x6a
 475     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 476     jmpCommonIdtEntry
 477 # No. 30
 478     pushl   $0x0    # push error code place holder on the stack
 479 #    push    xxh     ; push vector number
 480     .byte 0x6a
 481     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 482     jmpCommonIdtEntry
 483 # No. 31
 484     pushl   $0x0    # push error code place holder on the stack
 485 #    push    xxh     ; push vector number
 486     .byte 0x6a
 487     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 488     jmpCommonIdtEntry
 489 # No. 32
 490     pushl   $0x0    # push error code place holder on the stack
 491 #    push    xxh     ; push vector number
 492     .byte 0x6a
 493     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 494     jmpCommonIdtEntry
 495 # No. 33
 496     pushl   $0x0    # push error code place holder on the stack
 497 #    push    xxh     ; push vector number
 498     .byte 0x6a
 499     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 500     jmpCommonIdtEntry
 501 # No. 34
 502     pushl   $0x0    # push error code place holder on the stack
 503 #    push    xxh     ; push vector number
 504     .byte 0x6a
 505     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 506     jmpCommonIdtEntry
 507 # No. 35
 508     pushl   $0x0    # push error code place holder on the stack
 509 #    push    xxh     ; push vector number
 510     .byte 0x6a
 511     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 512     jmpCommonIdtEntry
 513 # No. 36
 514     pushl   $0x0    # push error code place holder on the stack
 515 #    push    xxh     ; push vector number
 516     .byte 0x6a
 517     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 518     jmpCommonIdtEntry
 519 # No. 37
 520     pushl   $0x0    # push error code place holder on the stack
 521 #    push    xxh     ; push vector number
 522     .byte 0x6a
 523     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 524     jmpCommonIdtEntry
 525 # No. 38
 526     pushl   $0x0    # push error code place holder on the stack
 527 #    push    xxh     ; push vector number
 528     .byte 0x6a
 529     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 530     jmpCommonIdtEntry
 531 # No. 39
 532     pushl   $0x0    # push error code place holder on the stack
 533 #    push    xxh     ; push vector number
 534     .byte 0x6a
 535     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 536     jmpCommonIdtEntry
 537 # No. 40
 538     pushl   $0x0    # push error code place holder on the stack
 539 #    push    xxh     ; push vector number
 540     .byte 0x6a
 541     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 542     jmpCommonIdtEntry
 543 # No. 41
 544     pushl   $0x0    # push error code place holder on the stack
 545 #    push    xxh     ; push vector number
 546     .byte 0x6a
 547     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 548     jmpCommonIdtEntry
 549 # No. 42
 550     pushl   $0x0    # push error code place holder on the stack
 551 #    push    xxh     ; push vector number
 552     .byte 0x6a
 553     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 554     jmpCommonIdtEntry
 555 # No. 43
 556     pushl   $0x0    # push error code place holder on the stack
 557 #    push    xxh     ; push vector number
 558     .byte 0x6a
 559     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 560     jmpCommonIdtEntry
 561 # No. 44
 562     pushl   $0x0    # push error code place holder on the stack
 563 #    push    xxh     ; push vector number
 564     .byte 0x6a
 565     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 566     jmpCommonIdtEntry
 567 # No. 45
 568     pushl   $0x0    # push error code place holder on the stack
 569 #    push    xxh     ; push vector number
 570     .byte 0x6a
 571     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 572     jmpCommonIdtEntry
 573 # No. 46
 574     pushl   $0x0    # push error code place holder on the stack
 575 #    push    xxh     ; push vector number
 576     .byte 0x6a
 577     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 578     jmpCommonIdtEntry
 579 # No. 47
 580     pushl   $0x0    # push error code place holder on the stack
 581 #    push    xxh     ; push vector number
 582     .byte 0x6a
 583     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 584     jmpCommonIdtEntry
 585 # No. 48
 586     pushl   $0x0    # push error code place holder on the stack
 587 #    push    xxh     ; push vector number
 588     .byte 0x6a
 589     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 590     jmpCommonIdtEntry
 591 # No. 49
 592     pushl   $0x0    # push error code place holder on the stack
 593 #    push    xxh     ; push vector number
 594     .byte 0x6a
 595     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 596     jmpCommonIdtEntry
 597 # No. 50
 598     pushl   $0x0    # push error code place holder on the stack
 599 #    push    xxh     ; push vector number
 600     .byte 0x6a
 601     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 602     jmpCommonIdtEntry
 603 # No. 51
 604     pushl   $0x0    # push error code place holder on the stack
 605 #    push    xxh     ; push vector number
 606     .byte 0x6a
 607     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 608     jmpCommonIdtEntry
 609 # No. 52
 610     pushl   $0x0    # push error code place holder on the stack
 611 #    push    xxh     ; push vector number
 612     .byte 0x6a
 613     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 614     jmpCommonIdtEntry
 615 # No. 53
 616     pushl   $0x0    # push error code place holder on the stack
 617 #    push    xxh     ; push vector number
 618     .byte 0x6a
 619     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 620     jmpCommonIdtEntry
 621 # No. 54
 622     pushl   $0x0    # push error code place holder on the stack
 623 #    push    xxh     ; push vector number
 624     .byte 0x6a
 625     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 626     jmpCommonIdtEntry
 627 # No. 55
 628     pushl   $0x0    # push error code place holder on the stack
 629 #    push    xxh     ; push vector number
 630     .byte 0x6a
 631     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 632     jmpCommonIdtEntry
 633 # No. 56
 634     pushl   $0x0    # push error code place holder on the stack
 635 #    push    xxh     ; push vector number
 636     .byte 0x6a
 637     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 638     jmpCommonIdtEntry
 639 # No. 57
 640     pushl   $0x0    # push error code place holder on the stack
 641 #    push    xxh     ; push vector number
 642     .byte 0x6a
 643     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 644     jmpCommonIdtEntry
 645 # No. 58
 646     pushl   $0x0    # push error code place holder on the stack
 647 #    push    xxh     ; push vector number
 648     .byte 0x6a
 649     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 650     jmpCommonIdtEntry
 651 # No. 59
 652     pushl   $0x0    # push error code place holder on the stack
 653 #    push    xxh     ; push vector number
 654     .byte 0x6a
 655     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 656     jmpCommonIdtEntry
 657 # No. 60
 658     pushl   $0x0    # push error code place holder on the stack
 659 #    push    xxh     ; push vector number
 660     .byte 0x6a
 661     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 662     jmpCommonIdtEntry
 663 # No. 61
 664     pushl   $0x0    # push error code place holder on the stack
 665 #    push    xxh     ; push vector number
 666     .byte 0x6a
 667     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 668     jmpCommonIdtEntry
 669 # No. 62
 670     pushl   $0x0    # push error code place holder on the stack
 671 #    push    xxh     ; push vector number
 672     .byte 0x6a
 673     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 674     jmpCommonIdtEntry
 675 # No. 63
 676     pushl   $0x0    # push error code place holder on the stack
 677 #    push    xxh     ; push vector number
 678     .byte 0x6a
 679     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 680     jmpCommonIdtEntry
 681 # No. 64
 682     pushl   $0x0    # push error code place holder on the stack
 683 #    push    xxh     ; push vector number
 684     .byte 0x6a
 685     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 686     jmpCommonIdtEntry
 687 # No. 65
 688     pushl   $0x0    # push error code place holder on the stack
 689 #    push    xxh     ; push vector number
 690     .byte 0x6a
 691     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 692     jmpCommonIdtEntry
 693 # No. 66
 694     pushl   $0x0    # push error code place holder on the stack
 695 #    push    xxh     ; push vector number
 696     .byte 0x6a
 697     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 698     jmpCommonIdtEntry
 699 # No. 67
 700     pushl   $0x0    # push error code place holder on the stack
 701 #    push    xxh     ; push vector number
 702     .byte 0x6a
 703     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 704     jmpCommonIdtEntry
 705 # No. 68
 706     pushl   $0x0    # push error code place holder on the stack
 707 #    push    xxh     ; push vector number
 708     .byte 0x6a
 709     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 710     jmpCommonIdtEntry
 711 # No. 69
 712     pushl   $0x0    # push error code place holder on the stack
 713 #    push    xxh     ; push vector number
 714     .byte 0x6a
 715     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 716     jmpCommonIdtEntry
 717 # No. 70
 718     pushl   $0x0    # push error code place holder on the stack
 719 #    push    xxh     ; push vector number
 720     .byte 0x6a
 721     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 722     jmpCommonIdtEntry
 723 # No. 71
 724     pushl   $0x0    # push error code place holder on the stack
 725 #    push    xxh     ; push vector number
 726     .byte 0x6a
 727     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 728     jmpCommonIdtEntry
 729 # No. 72
 730     pushl   $0x0    # push error code place holder on the stack
 731 #    push    xxh     ; push vector number
 732     .byte 0x6a
 733     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 734     jmpCommonIdtEntry
 735 # No. 73
 736     pushl   $0x0    # push error code place holder on the stack
 737 #    push    xxh     ; push vector number
 738     .byte 0x6a
 739     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 740     jmpCommonIdtEntry
 741 # No. 74
 742     pushl   $0x0    # push error code place holder on the stack
 743 #    push    xxh     ; push vector number
 744     .byte 0x6a
 745     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 746     jmpCommonIdtEntry
 747 # No. 75
 748     pushl   $0x0    # push error code place holder on the stack
 749 #    push    xxh     ; push vector number
 750     .byte 0x6a
 751     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 752     jmpCommonIdtEntry
 753 # No. 76
 754     pushl   $0x0    # push error code place holder on the stack
 755 #    push    xxh     ; push vector number
 756     .byte 0x6a
 757     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 758     jmpCommonIdtEntry
 759 # No. 77
 760     pushl   $0x0    # push error code place holder on the stack
 761 #    push    xxh     ; push vector number
 762     .byte 0x6a
 763     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 764     jmpCommonIdtEntry
 765 # No. 78
 766     pushl   $0x0    # push error code place holder on the stack
 767 #    push    xxh     ; push vector number
 768     .byte 0x6a
 769     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 770     jmpCommonIdtEntry
 771 # No. 79
 772     pushl   $0x0    # push error code place holder on the stack
 773 #    push    xxh     ; push vector number
 774     .byte 0x6a
 775     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 776     jmpCommonIdtEntry
 777 # No. 80
 778     pushl   $0x0    # push error code place holder on the stack
 779 #    push    xxh     ; push vector number
 780     .byte 0x6a
 781     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 782     jmpCommonIdtEntry
 783 # No. 81
 784     pushl   $0x0    # push error code place holder on the stack
 785 #    push    xxh     ; push vector number
 786     .byte 0x6a
 787     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 788     jmpCommonIdtEntry
 789 # No. 82
 790     pushl   $0x0    # push error code place holder on the stack
 791 #    push    xxh     ; push vector number
 792     .byte 0x6a
 793     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 794     jmpCommonIdtEntry
 795 # No. 83
 796     pushl   $0x0    # push error code place holder on the stack
 797 #    push    xxh     ; push vector number
 798     .byte 0x6a
 799     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 800     jmpCommonIdtEntry
 801 # No. 84
 802     pushl   $0x0    # push error code place holder on the stack
 803 #    push    xxh     ; push vector number
 804     .byte 0x6a
 805     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 806     jmpCommonIdtEntry
 807 # No. 85
 808     pushl   $0x0    # push error code place holder on the stack
 809 #    push    xxh     ; push vector number
 810     .byte 0x6a
 811     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 812     jmpCommonIdtEntry
 813 # No. 86
 814     pushl   $0x0    # push error code place holder on the stack
 815 #    push    xxh     ; push vector number
 816     .byte 0x6a
 817     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 818     jmpCommonIdtEntry
 819 # No. 87
 820     pushl   $0x0    # push error code place holder on the stack
 821 #    push    xxh     ; push vector number
 822     .byte 0x6a
 823     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 824     jmpCommonIdtEntry
 825 # No. 88
 826     pushl   $0x0    # push error code place holder on the stack
 827 #    push    xxh     ; push vector number
 828     .byte 0x6a
 829     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 830     jmpCommonIdtEntry
 831 # No. 89
 832     pushl   $0x0    # push error code place holder on the stack
 833 #    push    xxh     ; push vector number
 834     .byte 0x6a
 835     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 836     jmpCommonIdtEntry
 837 # No. 90
 838     pushl   $0x0    # push error code place holder on the stack
 839 #    push    xxh     ; push vector number
 840     .byte 0x6a
 841     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 842     jmpCommonIdtEntry
 843 # No. 91
 844     pushl   $0x0    # push error code place holder on the stack
 845 #    push    xxh     ; push vector number
 846     .byte 0x6a
 847     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 848     jmpCommonIdtEntry
 849 # No. 92
 850     pushl   $0x0    # push error code place holder on the stack
 851 #    push    xxh     ; push vector number
 852     .byte 0x6a
 853     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 854     jmpCommonIdtEntry
 855 # No. 93
 856     pushl   $0x0    # push error code place holder on the stack
 857 #    push    xxh     ; push vector number
 858     .byte 0x6a
 859     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 860     jmpCommonIdtEntry
 861 # No. 94
 862     pushl   $0x0    # push error code place holder on the stack
 863 #    push    xxh     ; push vector number
 864     .byte 0x6a
 865     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 866     jmpCommonIdtEntry
 867 # No. 95
 868     pushl   $0x0    # push error code place holder on the stack
 869 #    push    xxh     ; push vector number
 870     .byte 0x6a
 871     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 872     jmpCommonIdtEntry
 873 # No. 96
 874     pushl   $0x0    # push error code place holder on the stack
 875 #    push    xxh     ; push vector number
 876     .byte 0x6a
 877     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 878     jmpCommonIdtEntry
 879 # No. 97
 880     pushl   $0x0    # push error code place holder on the stack
 881 #    push    xxh     ; push vector number
 882     .byte 0x6a
 883     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 884     jmpCommonIdtEntry
 885 # No. 98
 886     pushl   $0x0    # push error code place holder on the stack
 887 #    push    xxh     ; push vector number
 888     .byte 0x6a
 889     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 890     jmpCommonIdtEntry
 891 # No. 99
 892     pushl   $0x0    # push error code place holder on the stack
 893 #    push    xxh     ; push vector number
 894     .byte 0x6a
 895     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 896     jmpCommonIdtEntry
 897 # No. 100
 898     pushl   $0x0    # push error code place holder on the stack
 899 #    push    xxh     ; push vector number
 900     .byte 0x6a
 901     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 902     jmpCommonIdtEntry
 903
 904
 905 commonIdtEntry:
 906     pushl   %eax
 907     pushl   %ecx
 908     pushl   %edx
 909     pushl   %ebx
 910     pushl   %esp
 911     pushl   %ebp
 912     pushl   %esi
 913     pushl   %edi
 914     .byte 0x41
 915     .byte 0x50
 916 #    push    r8
 917     .byte 0x41
 918     .byte 0x51
 919 #    push    r9
 920     .byte 0x41
 921     .byte 0x52
 922 #    push    r10
 923     .byte 0x41
 924     .byte 0x53
 925 #    push    r11
 926     .byte 0x41
 927     .byte 0x54
 928 #    push    r12
 929     .byte 0x41
 930     .byte 0x55
 931 #    push    r13
 932     .byte 0x41
 933     .byte 0x56
 934 #    push    r14
 935     .byte 0x41
 936     .byte 0x57
 937 #    push    r15
 938     .byte 0x48
 939     movl    %esp,%ebp
 940 #    mov     rbp, rsp
 941
 942 ##
 943 ##  At this point the stack looks like this:
 944 ##
 945 ##      Calling SS
 946 ##      Calling RSP
 947 ##      rflags
 948 ##      Calling CS
 949 ##      Calling RIP
 950 ##      Error code or 0
 951 ##      Int num or 0ffh for unknown int num
 952 ##      rax
 953 ##      rcx
 954 ##      rdx
 955 ##      rbx
 956 ##      rsp
 957 ##      rbp
 958 ##      rsi
 959 ##      rdi
 960 ##      r8
 961 ##      r9
 962 ##      r10
 963 ##      r11
 964 ##      r12
 965 ##      r13
 966 ##      r14
 967 ##      r15 <------- RSP, RBP
 968 ##
 969
 970     call    ClearScreen
 971     mov     String1, %esi
 972     call    PrintString
 973     .byte 0x48
 974     movl    16*8(%ebp),%eax       ## move Int number into RAX
 975     .byte 0x48
 976     cmpl    $18,%eax
 977     ja      PrintDefaultString
 978 PrintExceptionString:
 979     shll    $3,%eax             ## multiply by 8 to get offset from StringTable to actual string address
 980     addl    StringTable, %eax
 981     movl    (%eax),%esi
 982     jmp     PrintTheString
 983 PrintDefaultString:
 984     movl    IntUnknownString, %esi
 985     # patch Int number
 986     movl    %eax,%edx
 987     call    A2C
 988     movb    %al,1(%esi)
 989     movl    %edx,%eax
 990     shrl    $4,%eax
 991     call    A2C
 992     movb    %al,(%esi)
 993 PrintTheString:
 994     call    PrintString
 995     movl    String2, %esi
 996     call    PrintString
 997     .byte 0x48
 998     movl    19*8(%ebp),%eax    # CS
 999     call    PrintQword
1000     movb    $':', %al
1001     movb    %al, (%edi)
1002     addl    $2,%edi
1003     .byte 0x48
1004     movl    18*8(%ebp),%eax    # RIP
1005     call    PrintQword
1006     movl    String3, %esi
1007     call    PrintString
1008
1009     movl    $0xb8140,%edi
1010
1011     movl    StringRax, %esi
1012     call    PrintString
1013     .byte 0x48
1014     movl    15*8(%ebp),%eax
1015     call    PrintQword
1016
1017     movl    StringRcx, %esi
1018     call    PrintString
1019     .byte 0x48
1020     movl    14*8(%ebp),%eax
1021     call    PrintQword
1022
1023     movl    StringRdx, %esi
1024     call    PrintString
1025     .byte 0x48
1026     movl    13*8(%ebp),%eax
1027     call    PrintQword
1028
1029     movl    $0xb81e0,%edi
1030
1031     movl    StringRbx, %esi
1032     call    PrintString
1033     .byte 0x48
1034     movl    12*8(%ebp),%eax
1035     call    PrintQword
1036
1037     movl    StringRsp, %esi
1038     call    PrintString
1039     .byte 0x48
1040     movl    21*8(%ebp),%eax
1041     call    PrintQword
1042
1043     movl    StringRbp, %esi
1044     call    PrintString
1045     .byte 0x48
1046     movl    10*8(%ebp),%eax
1047     call    PrintQword
1048
1049     movl    $0xb8280,%edi
1050
1051     movl    StringRsi, %esi
1052     call    PrintString
1053     .byte 0x48
1054     movl    9*8(%ebp),%eax
1055     call    PrintQword
1056
1057     movl    StringRdi, %esi
1058     call    PrintString
1059     .byte 0x48
1060     movl    8*8(%ebp),%eax
1061     call    PrintQword
1062
1063     movl    StringEcode, %esi
1064     call    PrintString
1065     .byte 0x48
1066     movl    17*8(%ebp),%eax
1067     call    PrintQword
1068
1069     movl    $0xb8320,%edi
1070
1071     movl    StringR8, %esi
1072     call    PrintString
1073     .byte 0x48
1074     movl    7*8(%ebp),%eax
1075     call    PrintQword
1076
1077     movl    StringR9, %esi
1078     call    PrintString
1079     .byte 0x48
1080     movl    6*8(%ebp),%eax
1081     call    PrintQword
1082
1083     movl    StringR10, %esi
1084     call    PrintString
1085     .byte 0x48
1086     movl    5*8(%ebp),%eax
1087     call    PrintQword
1088
1089     movl    $0xb83c0,%edi
1090
1091     movl    StringR11, %esi
1092     call    PrintString
1093     .byte 0x48
1094     movl    4*8(%ebp),%eax
1095     call    PrintQword
1096
1097     movl    StringR12, %esi
1098     call    PrintString
1099     .byte 0x48
1100     movl    3*8(%ebp),%eax
1101     call    PrintQword
1102
1103     movl    StringR13, %esi
1104     call    PrintString
1105     .byte 0x48
1106     movl    2*8(%ebp),%eax
1107     call    PrintQword
1108
1109     movl    $0xb8460,%edi
1110
1111     movl    StringR14, %esi
1112     call    PrintString
1113     .byte 0x48
1114     movl    1*8(%ebp),%eax
1115     call    PrintQword
1116
1117     movl    StringR15, %esi
1118     call    PrintString
1119     .byte 0x48
1120     movl    0*8(%ebp),%eax
1121     call    PrintQword
1122
1123     movl    StringSs, %esi
1124     call    PrintString
1125     .byte 0x48
1126     movl    22*8(%ebp),%eax
1127     call    PrintQword
1128
1129     movl    $0xb8500,%edi
1130
1131     movl    StringRflags, %esi
1132     call    PrintString
1133     .byte 0x48
1134     movl    20*8(%ebp),%eax
1135     call    PrintQword
1136
1137     movl    $0xb8640,%edi
1138
1139     movl    %ebp,%esi
1140     addl    $23*8,%esi
1141     movl    $4,%ecx
1142
1143
1144 OuterLoop:
1145     pushl   %ecx
1146     movl    $4,%ecx
1147     .byte 0x48
1148     movl    %edi,%edx
1149
1150 InnerLoop:
1151     .byte 0x48
1152     movl    (%esi),%eax
1153     call    PrintQword
1154     addl    $8,%esi
1155     mov     $0x00, %al
1156     movb    %al,(%edi)
1157     addl    $2,%edi
1158     loop    InnerLoop
1159
1160     popl    %ecx
1161     addl    $0xa0,%edx
1162     movl    %edx,%edi
1163     loop    OuterLoop
1164
1165
1166     movl    $0xb8960,%edi
1167
1168     .byte 0x48
1169     movl    18*8(%ebp),%eax  # RIP
1170     subl    $8*8,%eax
1171     .byte 0x48
1172     movl    %eax,%esi       # esi = rip - 8 QWORD linear (total 16 QWORD)
1173
1174     movl    $4,%ecx
1175
1176 OuterLoop1:
1177     pushl   %ecx
1178     movl    $4,%ecx
1179     movl    %edi,%edx
1180
1181 InnerLoop1:
1182     .byte 0x48
1183     movl    (%esi),%eax
1184     call    PrintQword
1185     addl    $8,%esi
1186     movb    $0x00, %al
1187     movb    %al,(%edi)
1188     addl    $2,%edi
1189     loop    InnerLoop1
1190
1191     popl    %ecx
1192     addl    $0xa0,%edx
1193     movl    %edx,%edi
1194     loop    OuterLoop1
1195
1196
1197
1198     #wbinvd
1199 LN_C1:
1200     jmp     LN_C1
1201
1202 #
1203 # return
1204 #
1205     movl    %ebp,%esp
1206 #    mov     rsp, rbp
1207     .byte 0x41
1208     .byte 0x5f
1209 #    pop    r15
1210     .byte 0x41
1211     .byte 0x5e
1212 #    pop    r14
1213     .byte 0x41
1214     .byte 0x5d
1215 #    pop    r13
1216     .byte 0x41
1217     .byte 0x5c
1218 #    pop    r12
1219     .byte 0x41
1220     .byte 0x5b
1221 #    pop    r11
1222     .byte 0x41
1223     .byte 0x5a
1224 #    pop    r10
1225     .byte 0x41
1226     .byte 0x59
1227 #    pop    r9
1228     .byte 0x41
1229     .byte 0x58
1230 #    pop    r8
1231     popl   %edi
1232     popl   %esi
1233     popl   %ebp
1234     popl   %eax # esp
1235     popl   %ebx
1236     popl   %edx
1237     popl   %ecx
1238     popl   %eax
1239
1240     .byte 0x48
1241     .byte 0x83
1242     .byte 0xc4
1243     .byte 0x10
1244 #    add    esp, 16 ; error code and INT number
1245
1246     .byte 0x48
1247     .byte 0xcf
1248 #    iretq
1249
1250 PrintString:
1251     pushl   %eax
1252 LN_C2:
1253     movb    (%esi), %al
1254     cmpb    $0,%al
1255     je      LN_C3
1256     movb    %al, (%edi)
1257     .byte 0xff
1258     .byte 0xc6
1259 #    inc     esi
1260     addl    $2,%edi
1261     jmp     LN_C2
1262 LN_C3:
1263     popl    %eax
1264     ret
1265
1266 ## RAX contains qword to print
1267 ## RDI contains memory location (screen location) to print it to
1268 PrintQword:
1269     pushl   %ecx
1270     pushl   %ebx
1271     pushl   %eax
1272
1273     .byte 0x48
1274     .byte 0xc7
1275     .byte 0xc1
1276     .long 16
1277 #    mov     rcx, 16
1278 looptop:
1279     .byte 0x48
1280     roll    $4,%eax
1281     movb    %al,%bl
1282     andb    $0xf,%bl
1283     addb    $'0', %bl
1284     cmpb    $'9', %bl
1285     jle     LN_C4
1286     addb    $7,%bl
1287 LN_C4:
1288     movb %bl, (%edi)
1289     addl    $2,%edi
1290     loop    looptop
1291     #wbinvd
1292
1293     popl    %eax
1294     popl    %ebx
1295     popl    %ecx
1296     ret
1297
1298 ClearScreen:
1299     pushl   %eax
1300     pushl   %ecx
1301
1302     movb    $0x00, %al
1303     movb    $0xc,%ah
1304     movl    $0xb8000,%edi
1305     movl    $80*24,%ecx
1306 LN_C5:
1307     movw    %ax, (%edi)
1308     addl    $2,%edi
1309     loop    LN_C5
1310     movl    $0xb8000,%edi
1311
1312     popl    %ecx
1313     popl    %eax
1314
1315     ret
1316
1317 A2C:
1318     andb    $0xf,%al
1319     addb    $'0', %al
1320     cmpb    $'9', %al
1321     jle     LN_C6
1322     addb    $7,%al
1323 LN_C6:
1324     ret
1325
1326 String1:            .asciz      "*** INT "
1327
1328 Int0String:         .asciz      "00h Divide by 0 -"
1329 Int1String:         .asciz      "01h Debug exception -"
1330 Int2String:         .asciz      "02h NMI -"
1331 Int3String:         .asciz      "03h Breakpoint -"
1332 Int4String:         .asciz      "04h Overflow -"
1333 Int5String:         .asciz      "05h Bound -"
1334 Int6String:         .asciz      "06h Invalid opcode -"
1335 Int7String:         .asciz      "07h Device not available -"
1336 Int8String:         .asciz      "08h Double fault -"
1337 Int9String:         .asciz      "09h Coprocessor seg overrun (reserved) -"
1338 Int10String:        .asciz      "0Ah Invalid TSS -"
1339 Int11String:        .asciz      "0Bh Segment not present -"
1340 Int12String:        .asciz      "0Ch Stack fault -"
1341 Int13String:        .asciz      "0Dh General protection fault -"
1342 Int14String:        .asciz      "0Eh Page fault -"
1343 Int15String:        .asciz      "0Fh (Intel reserved) -"
1344 Int16String:        .asciz      "10h Floating point error -"
1345 Int17String:        .asciz      "11h Alignment check -"
1346 Int18String:        .asciz      "12h Machine check -"
1347 Int19String:        .asciz      "13h SIMD Floating-Point Exception -"
1348 IntUnknownString:   .asciz      "??h Unknown interrupt -"
1349
1350 StringTable:   .long  Int0String, Int1String, Int2String, Int3String,    \
1351                       Int4String, Int5String, Int6String, Int7String,    \
1352                       Int8String, Int9String, Int10String, Int11String,  \
1353                       Int12String, Int13String, Int14String, Int15String,\
1354                       Int16String, Int17String, Int18String, Int19String
1355
1356 String2:           .asciz  " HALT!! *** ("
1357 String3:           .asciz  ")"
1358 StringRax:         .asciz  "RAX="
1359 StringRcx:         .asciz  " RCX="
1360 StringRdx:         .asciz  " RDX="
1361 StringRbx:         .asciz  "RBX="
1362 StringRsp:         .asciz  " RSP="
1363 StringRbp:         .asciz  " RBP="
1364 StringRsi:         .asciz  "RSI="
1365 StringRdi:         .asciz  " RDI="
1366 StringEcode:       .asciz  " ECODE="
1367 StringR8:          .asciz  "R8 ="
1368 StringR9:          .asciz  " R9 ="
1369 StringR10:         .asciz  " R10="
1370 StringR11:         .asciz  "R11="
1371 StringR12:         .asciz  " R12="
1372 StringR13:         .asciz  " R13="
1373 StringR14:         .asciz  "R14="
1374 StringR15:         .asciz  " R15="
1375 StringSs:          .asciz  " SS ="
1376 StringRflags:      .asciz  "RFLAGS="
1377
1378 Idtr:        .float  0
1379             .float  0
1380
1381     .org 0x21ffe
1382 BlockSignature:
1383     .word 0xaa55
1384