DuetPkg/BootSector/efi64.S

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