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     movl    $Idtr, %eax
  63     sidt    (%eax)                      # get fword address of IDT
  64
  65
  66     movl    $Halt, %eax
  67     movl    %eax,%ebx                   # use bx to copy 15..0 to descriptors
  68     shrl    $16,%eax                    # use ax to copy 31..16 to descriptors
  69                                         # 63..32 of descriptors is 0
  70     movl    $0x78,%ecx                  # 78h IDT entries to initialize with unique entry points (exceptions)
  71     movl    $(Idtr + 2), %esi
  72     movl    (%esi),%edi
  73
  74 LOOP_1:                                         # loop through all IDT entries exception handlers and initialize to default handler
  75     movw    %bx, (%edi)                         # write bits 15..0 of offset
  76     movw    $0x38, 2(%edi)                      # SYS_CODE_SEL64 from GDT
  77     movw    $(0x0e00 | 0x8000), 4(%edi)         # type = 386 interrupt gate, present
  78     movw    %ax, 6(%edi)                        # write bits 31..16 of offset
  79     movl    $0, 8(%edi)                         # write bits 31..16 of offset
  80     addl    $16, %edi                           # move up to next descriptor
  81     addw    $DEFAULT_HANDLER_SIZE, %bx          # move to next entry point
  82     loopl   LOOP_1                              # loop back through again until all descriptors are initialized
  83
  84     ## at this point edi contains the offset of the descriptor for INT 20
  85     ## and bx contains the low 16 bits of the offset of the default handler
  86     ## so initialize all the rest of the descriptors with these two values...
  87 #    mov     ecx, 101                            ; there are 100 descriptors left (INT 20 (14h) - INT 119 (77h)
  88 #@@:                                             ; loop through all IDT entries exception handlers and initialize to default handler
  89 #    mov     word ptr [edi], bx                  ; write bits 15..0 of offset
  90 #    mov     word ptr [edi+2], 38h               ; SYS_CODE64_SEL from GDT
  91 #    mov     word ptr [edi+4], 0e00h OR 8000h    ; type = 386 interrupt gate, present
  92 #    mov     word ptr [edi+6], ax                ; write bits 31..16 of offset
  93 #    mov     dword ptr [edi+8], 0                ; write bits 63..32 of offset
  94 #    add     edi, 16                             ; move up to next descriptor
  95 #    loop    @b                                  ; loop back through again until all descriptors are initialized
  96
  97
  98 ##  DUMP    location of IDT and several of the descriptors
  99 #    mov     ecx, 8
 100 #    mov     eax, [offset Idtr + 2]
 101 #    mov     eax, [eax]
 102 #    mov     edi, 0b8000h
 103 #    call    PrintQword
 104 #    mov     esi, eax
 105 #    mov     edi, 0b80a0h
 106 #    jmp     OuterLoop
 107
 108 ##
 109 ## just for fun, let's do a software interrupt to see if we correctly land in the exception handler...
 110 #    mov     eax, 011111111h
 111 #    mov     ebx, 022222222h
 112 #    mov     ecx, 033333333h
 113 #    mov     edx, 044444444h
 114 #    mov     ebp, 055555555h
 115 #    mov     esi, 066666666h
 116 #    mov     edi, 077777777h
 117 #    push    011111111h
 118 #    push    022222222h
 119 #    push    033333333h
 120 #    int     119
 121
 122     movl    $0x22000,%esi               # esi = 22000
 123     movl    0x14(%esi),%eax             # eax = [22014]
 124     addl    %eax,%esi                   # esi = 22000 + [22014] = Base of EFILDR.C
 125     movl    0x3c(%esi),%ebp             # ebp = [22000 + [22014] + 3c] = NT Image Header for EFILDR.C
 126     addl    %esi,%ebp
 127     movl    0x30(%ebp),%edi             # edi = [[22000 + [22014] + 3c] + 2c] = ImageBase (63..32 is zero, ignore)
 128     movl    0x28(%ebp),%eax             # eax = [[22000 + [22014] + 3c] + 24] = EntryPoint
 129     addl    %edi,%eax                   # eax = ImageBase + EntryPoint
 130     movl    $EfiLdrOffset, %ebx
 131     movl    %eax, (%ebx)                # Modify far jump instruction for correct entry point
 132
 133     movw    6(%ebp), %bx                # bx = Number of sections
 134     xorl    %eax,%eax
 135     movw    0x14(%ebp), %ax             # ax = Optional Header Size
 136     addl    %eax,%ebp
 137     addl    $0x18,%ebp                  # ebp = Start of 1st Section
 138
 139 SectionLoop:
 140     pushl   %esi                        # Save Base of EFILDR.C
 141     pushl   %edi                        # Save ImageBase
 142     addl    0x14(%ebp),%esi             # esi = Base of EFILDR.C + PointerToRawData
 143     addl    0x0c(%ebp),%edi             # edi = ImageBase + VirtualAddress
 144     movl    0x10(%ebp),%ecx             # ecs = SizeOfRawData
 145
 146     cld
 147     shrl    $2,%ecx
 148     rep
 149     movsl
 150
 151     popl    %edi                        # Restore ImageBase
 152     popl    %esi                        # Restore Base of EFILDR.C
 153
 154     addw    $0x28,%bp                   # ebp = ebp + 028h = Pointer to next section record
 155     .byte 0x66
 156     .byte 0xff
 157     .byte 0xcb
 158 #    dec     bx
 159     cmpw    $0,%bx
 160     jne     SectionLoop
 161
 162     movl    $Idtr, %edx                  # get size of IDT
 163     movzxw  (%edx), %eax
 164     .byte 0xff
 165     .byte 0xc0
 166 #    inc     eax
 167     addl    2(%edx), %eax                # add to base of IDT to get location of memory map...
 168     xorl    %ecx,%ecx
 169     movl    %eax,%ecx                    # put argument to RCX
 170
 171     .byte 0x48
 172     .byte 0xc7
 173     .byte 0xc0
 174 EfiLdrOffset:
 175     .long 0x00401000                    # Offset of EFILDR
 176 #   mov rax, 401000h
 177     .byte 0x50
 178 #   push rax
 179
 180 # ret
 181     .byte 0xc3
 182
 183 #    db      "**** DEFAULT IDT ENTRY ***",0
 184     .p2align 1
 185 Halt:
 186 INT0:
 187     pushl   $0x0    # push error code place holder on the stack
 188     pushl   $0x0
 189     jmpCommonIdtEntry
 190 #    db      0e9h                        ; jmp 16 bit reletive
 191 #    dd      commonIdtEntry - $ - 4      ;  offset to jump to
 192
 193 INT1:
 194     pushl   $0x0    # push error code place holder on the stack
 195     pushl   $0x1
 196     jmpCommonIdtEntry
 197
 198 INT2:
 199     pushl   $0x0    # push error code place holder on the stack
 200     pushl   $0x2
 201     jmpCommonIdtEntry
 202
 203 INT3:
 204     pushl   $0x0    # push error code place holder on the stack
 205     pushl   $0x3
 206     jmpCommonIdtEntry
 207
 208 INT4:
 209     pushl   $0x0    # push error code place holder on the stack
 210     pushl   $0x4
 211     jmpCommonIdtEntry
 212
 213 INT5:
 214     pushl   $0x0    # push error code place holder on the stack
 215     pushl   $0x5
 216     jmpCommonIdtEntry
 217
 218 INT6:
 219     pushl   $0x0    # push error code place holder on the stack
 220     pushl   $0x6
 221     jmpCommonIdtEntry
 222
 223 INT7:
 224     pushl   $0x0    # push error code place holder on the stack
 225     pushl   $0x7
 226     jmpCommonIdtEntry
 227
 228 INT8:
 229 #   Double fault causes an error code to be pushed so no phony push necessary
 230     nop
 231     nop
 232     pushl   $0x8
 233     jmpCommonIdtEntry
 234
 235 INT9:
 236     pushl   $0x0    # push error code place holder on the stack
 237     pushl   $0x9
 238     jmpCommonIdtEntry
 239
 240 INT10:
 241 #   Invalid TSS causes an error code to be pushed so no phony push necessary
 242     nop
 243     nop
 244     pushl   $10
 245     jmpCommonIdtEntry
 246
 247 INT11:
 248 #   Segment Not Present causes an error code to be pushed so no phony push necessary
 249     nop
 250     nop
 251     pushl   $11
 252     jmpCommonIdtEntry
 253
 254 INT12:
 255 #   Stack fault causes an error code to be pushed so no phony push necessary
 256     nop
 257     nop
 258     pushl   $12
 259     jmpCommonIdtEntry
 260
 261 INT13:
 262 #   GP fault causes an error code to be pushed so no phony push necessary
 263     nop
 264     nop
 265     pushl   $13
 266     jmpCommonIdtEntry
 267
 268 INT14:
 269 #   Page fault causes an error code to be pushed so no phony push necessary
 270     nop
 271     nop
 272     pushl   $14
 273     jmpCommonIdtEntry
 274
 275 INT15:
 276     pushl   $0x0    # push error code place holder on the stack
 277     pushl   $15
 278     jmpCommonIdtEntry
 279
 280 INT16:
 281     pushl   $0x0    # push error code place holder on the stack
 282     pushl   $16
 283     jmpCommonIdtEntry
 284
 285 INT17:
 286 #   Alignment check causes an error code to be pushed so no phony push necessary
 287     nop
 288     nop
 289     pushl   $17
 290     jmpCommonIdtEntry
 291
 292 INT18:
 293     pushl   $0x0    # push error code place holder on the stack
 294     pushl   $18
 295     jmpCommonIdtEntry
 296
 297 INT19:
 298     pushl   $0x0    # push error code place holder on the stack
 299     pushl   $19
 300     jmpCommonIdtEntry
 301
 302 INTUnknown:
 303 # The following segment repeats (0x78 - 20) times:
 304 # No. 1
 305     pushl   $0x0    # push error code place holder on the stack
 306 #    push    xxh     ; push vector number
 307     .byte 0x6a
 308     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 309     jmpCommonIdtEntry
 310 # No. 2
 311     pushl   $0x0    # push error code place holder on the stack
 312 #    push    xxh     ; push vector number
 313     .byte 0x6a
 314     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 315     jmpCommonIdtEntry
 316 # No. 3
 317     pushl   $0x0    # push error code place holder on the stack
 318 #    push    xxh     ; push vector number
 319     .byte 0x6a
 320     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 321     jmpCommonIdtEntry
 322 # No. 4
 323     pushl   $0x0    # push error code place holder on the stack
 324 #    push    xxh     ; push vector number
 325     .byte 0x6a
 326     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 327     jmpCommonIdtEntry
 328 # No. 5
 329     pushl   $0x0    # push error code place holder on the stack
 330 #    push    xxh     ; push vector number
 331     .byte 0x6a
 332     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 333     jmpCommonIdtEntry
 334 # No. 6
 335     pushl   $0x0    # push error code place holder on the stack
 336 #    push    xxh     ; push vector number
 337     .byte 0x6a
 338     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 339     jmpCommonIdtEntry
 340 # No. 7
 341     pushl   $0x0    # push error code place holder on the stack
 342 #    push    xxh     ; push vector number
 343     .byte 0x6a
 344     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 345     jmpCommonIdtEntry
 346 # No. 8
 347     pushl   $0x0    # push error code place holder on the stack
 348 #    push    xxh     ; push vector number
 349     .byte 0x6a
 350     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 351     jmpCommonIdtEntry
 352 # No. 9
 353     pushl   $0x0    # push error code place holder on the stack
 354 #    push    xxh     ; push vector number
 355     .byte 0x6a
 356     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 357     jmpCommonIdtEntry
 358 # No. 10
 359     pushl   $0x0    # push error code place holder on the stack
 360 #    push    xxh     ; push vector number
 361     .byte 0x6a
 362     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 363     jmpCommonIdtEntry
 364 # No. 11
 365     pushl   $0x0    # push error code place holder on the stack
 366 #    push    xxh     ; push vector number
 367     .byte 0x6a
 368     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 369     jmpCommonIdtEntry
 370 # No. 12
 371     pushl   $0x0    # push error code place holder on the stack
 372 #    push    xxh     ; push vector number
 373     .byte 0x6a
 374     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 375     jmpCommonIdtEntry
 376 # No. 13
 377     pushl   $0x0    # push error code place holder on the stack
 378 #    push    xxh     ; push vector number
 379     .byte 0x6a
 380     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 381     jmpCommonIdtEntry
 382 # No. 14
 383     pushl   $0x0    # push error code place holder on the stack
 384 #    push    xxh     ; push vector number
 385     .byte 0x6a
 386     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 387     jmpCommonIdtEntry
 388 # No. 15
 389     pushl   $0x0    # push error code place holder on the stack
 390 #    push    xxh     ; push vector number
 391     .byte 0x6a
 392     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 393     jmpCommonIdtEntry
 394 # No. 16
 395     pushl   $0x0    # push error code place holder on the stack
 396 #    push    xxh     ; push vector number
 397     .byte 0x6a
 398     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 399     jmpCommonIdtEntry
 400 # No. 17
 401     pushl   $0x0    # push error code place holder on the stack
 402 #    push    xxh     ; push vector number
 403     .byte 0x6a
 404     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 405     jmpCommonIdtEntry
 406 # No. 18
 407     pushl   $0x0    # push error code place holder on the stack
 408 #    push    xxh     ; push vector number
 409     .byte 0x6a
 410     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 411     jmpCommonIdtEntry
 412 # No. 19
 413     pushl   $0x0    # push error code place holder on the stack
 414 #    push    xxh     ; push vector number
 415     .byte 0x6a
 416     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 417     jmpCommonIdtEntry
 418 # No. 20
 419     pushl   $0x0    # push error code place holder on the stack
 420 #    push    xxh     ; push vector number
 421     .byte 0x6a
 422     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 423     jmpCommonIdtEntry
 424 # No. 21
 425     pushl   $0x0    # push error code place holder on the stack
 426 #    push    xxh     ; push vector number
 427     .byte 0x6a
 428     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 429     jmpCommonIdtEntry
 430 # No. 22
 431     pushl   $0x0    # push error code place holder on the stack
 432 #    push    xxh     ; push vector number
 433     .byte 0x6a
 434     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 435     jmpCommonIdtEntry
 436 # No. 23
 437     pushl   $0x0    # push error code place holder on the stack
 438 #    push    xxh     ; push vector number
 439     .byte 0x6a
 440     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 441     jmpCommonIdtEntry
 442 # No. 24
 443     pushl   $0x0    # push error code place holder on the stack
 444 #    push    xxh     ; push vector number
 445     .byte 0x6a
 446     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 447     jmpCommonIdtEntry
 448 # No. 25
 449     pushl   $0x0    # push error code place holder on the stack
 450 #    push    xxh     ; push vector number
 451     .byte 0x6a
 452     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 453     jmpCommonIdtEntry
 454 # No. 26
 455     pushl   $0x0    # push error code place holder on the stack
 456 #    push    xxh     ; push vector number
 457     .byte 0x6a
 458     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 459     jmpCommonIdtEntry
 460 # No. 27
 461     pushl   $0x0    # push error code place holder on the stack
 462 #    push    xxh     ; push vector number
 463     .byte 0x6a
 464     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 465     jmpCommonIdtEntry
 466 # No. 28
 467     pushl   $0x0    # push error code place holder on the stack
 468 #    push    xxh     ; push vector number
 469     .byte 0x6a
 470     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 471     jmpCommonIdtEntry
 472 # No. 29
 473     pushl   $0x0    # push error code place holder on the stack
 474 #    push    xxh     ; push vector number
 475     .byte 0x6a
 476     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 477     jmpCommonIdtEntry
 478 # No. 30
 479     pushl   $0x0    # push error code place holder on the stack
 480 #    push    xxh     ; push vector number
 481     .byte 0x6a
 482     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 483     jmpCommonIdtEntry
 484 # No. 31
 485     pushl   $0x0    # push error code place holder on the stack
 486 #    push    xxh     ; push vector number
 487     .byte 0x6a
 488     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 489     jmpCommonIdtEntry
 490 # No. 32
 491     pushl   $0x0    # push error code place holder on the stack
 492 #    push    xxh     ; push vector number
 493     .byte 0x6a
 494     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 495     jmpCommonIdtEntry
 496 # No. 33
 497     pushl   $0x0    # push error code place holder on the stack
 498 #    push    xxh     ; push vector number
 499     .byte 0x6a
 500     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 501     jmpCommonIdtEntry
 502 # No. 34
 503     pushl   $0x0    # push error code place holder on the stack
 504 #    push    xxh     ; push vector number
 505     .byte 0x6a
 506     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 507     jmpCommonIdtEntry
 508 # No. 35
 509     pushl   $0x0    # push error code place holder on the stack
 510 #    push    xxh     ; push vector number
 511     .byte 0x6a
 512     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 513     jmpCommonIdtEntry
 514 # No. 36
 515     pushl   $0x0    # push error code place holder on the stack
 516 #    push    xxh     ; push vector number
 517     .byte 0x6a
 518     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 519     jmpCommonIdtEntry
 520 # No. 37
 521     pushl   $0x0    # push error code place holder on the stack
 522 #    push    xxh     ; push vector number
 523     .byte 0x6a
 524     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 525     jmpCommonIdtEntry
 526 # No. 38
 527     pushl   $0x0    # push error code place holder on the stack
 528 #    push    xxh     ; push vector number
 529     .byte 0x6a
 530     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 531     jmpCommonIdtEntry
 532 # No. 39
 533     pushl   $0x0    # push error code place holder on the stack
 534 #    push    xxh     ; push vector number
 535     .byte 0x6a
 536     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 537     jmpCommonIdtEntry
 538 # No. 40
 539     pushl   $0x0    # push error code place holder on the stack
 540 #    push    xxh     ; push vector number
 541     .byte 0x6a
 542     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 543     jmpCommonIdtEntry
 544 # No. 41
 545     pushl   $0x0    # push error code place holder on the stack
 546 #    push    xxh     ; push vector number
 547     .byte 0x6a
 548     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 549     jmpCommonIdtEntry
 550 # No. 42
 551     pushl   $0x0    # push error code place holder on the stack
 552 #    push    xxh     ; push vector number
 553     .byte 0x6a
 554     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 555     jmpCommonIdtEntry
 556 # No. 43
 557     pushl   $0x0    # push error code place holder on the stack
 558 #    push    xxh     ; push vector number
 559     .byte 0x6a
 560     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 561     jmpCommonIdtEntry
 562 # No. 44
 563     pushl   $0x0    # push error code place holder on the stack
 564 #    push    xxh     ; push vector number
 565     .byte 0x6a
 566     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 567     jmpCommonIdtEntry
 568 # No. 45
 569     pushl   $0x0    # push error code place holder on the stack
 570 #    push    xxh     ; push vector number
 571     .byte 0x6a
 572     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 573     jmpCommonIdtEntry
 574 # No. 46
 575     pushl   $0x0    # push error code place holder on the stack
 576 #    push    xxh     ; push vector number
 577     .byte 0x6a
 578     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 579     jmpCommonIdtEntry
 580 # No. 47
 581     pushl   $0x0    # push error code place holder on the stack
 582 #    push    xxh     ; push vector number
 583     .byte 0x6a
 584     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 585     jmpCommonIdtEntry
 586 # No. 48
 587     pushl   $0x0    # push error code place holder on the stack
 588 #    push    xxh     ; push vector number
 589     .byte 0x6a
 590     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 591     jmpCommonIdtEntry
 592 # No. 49
 593     pushl   $0x0    # push error code place holder on the stack
 594 #    push    xxh     ; push vector number
 595     .byte 0x6a
 596     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 597     jmpCommonIdtEntry
 598 # No. 50
 599     pushl   $0x0    # push error code place holder on the stack
 600 #    push    xxh     ; push vector number
 601     .byte 0x6a
 602     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 603     jmpCommonIdtEntry
 604 # No. 51
 605     pushl   $0x0    # push error code place holder on the stack
 606 #    push    xxh     ; push vector number
 607     .byte 0x6a
 608     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 609     jmpCommonIdtEntry
 610 # No. 52
 611     pushl   $0x0    # push error code place holder on the stack
 612 #    push    xxh     ; push vector number
 613     .byte 0x6a
 614     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 615     jmpCommonIdtEntry
 616 # No. 53
 617     pushl   $0x0    # push error code place holder on the stack
 618 #    push    xxh     ; push vector number
 619     .byte 0x6a
 620     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 621     jmpCommonIdtEntry
 622 # No. 54
 623     pushl   $0x0    # push error code place holder on the stack
 624 #    push    xxh     ; push vector number
 625     .byte 0x6a
 626     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 627     jmpCommonIdtEntry
 628 # No. 55
 629     pushl   $0x0    # push error code place holder on the stack
 630 #    push    xxh     ; push vector number
 631     .byte 0x6a
 632     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 633     jmpCommonIdtEntry
 634 # No. 56
 635     pushl   $0x0    # push error code place holder on the stack
 636 #    push    xxh     ; push vector number
 637     .byte 0x6a
 638     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 639     jmpCommonIdtEntry
 640 # No. 57
 641     pushl   $0x0    # push error code place holder on the stack
 642 #    push    xxh     ; push vector number
 643     .byte 0x6a
 644     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 645     jmpCommonIdtEntry
 646 # No. 58
 647     pushl   $0x0    # push error code place holder on the stack
 648 #    push    xxh     ; push vector number
 649     .byte 0x6a
 650     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 651     jmpCommonIdtEntry
 652 # No. 59
 653     pushl   $0x0    # push error code place holder on the stack
 654 #    push    xxh     ; push vector number
 655     .byte 0x6a
 656     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 657     jmpCommonIdtEntry
 658 # No. 60
 659     pushl   $0x0    # push error code place holder on the stack
 660 #    push    xxh     ; push vector number
 661     .byte 0x6a
 662     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 663     jmpCommonIdtEntry
 664 # No. 61
 665     pushl   $0x0    # push error code place holder on the stack
 666 #    push    xxh     ; push vector number
 667     .byte 0x6a
 668     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 669     jmpCommonIdtEntry
 670 # No. 62
 671     pushl   $0x0    # push error code place holder on the stack
 672 #    push    xxh     ; push vector number
 673     .byte 0x6a
 674     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 675     jmpCommonIdtEntry
 676 # No. 63
 677     pushl   $0x0    # push error code place holder on the stack
 678 #    push    xxh     ; push vector number
 679     .byte 0x6a
 680     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 681     jmpCommonIdtEntry
 682 # No. 64
 683     pushl   $0x0    # push error code place holder on the stack
 684 #    push    xxh     ; push vector number
 685     .byte 0x6a
 686     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 687     jmpCommonIdtEntry
 688 # No. 65
 689     pushl   $0x0    # push error code place holder on the stack
 690 #    push    xxh     ; push vector number
 691     .byte 0x6a
 692     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 693     jmpCommonIdtEntry
 694 # No. 66
 695     pushl   $0x0    # push error code place holder on the stack
 696 #    push    xxh     ; push vector number
 697     .byte 0x6a
 698     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 699     jmpCommonIdtEntry
 700 # No. 67
 701     pushl   $0x0    # push error code place holder on the stack
 702 #    push    xxh     ; push vector number
 703     .byte 0x6a
 704     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 705     jmpCommonIdtEntry
 706 # No. 68
 707     pushl   $0x0    # push error code place holder on the stack
 708 #    push    xxh     ; push vector number
 709     .byte 0x6a
 710     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 711     jmpCommonIdtEntry
 712 # No. 69
 713     pushl   $0x0    # push error code place holder on the stack
 714 #    push    xxh     ; push vector number
 715     .byte 0x6a
 716     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 717     jmpCommonIdtEntry
 718 # No. 70
 719     pushl   $0x0    # push error code place holder on the stack
 720 #    push    xxh     ; push vector number
 721     .byte 0x6a
 722     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 723     jmpCommonIdtEntry
 724 # No. 71
 725     pushl   $0x0    # push error code place holder on the stack
 726 #    push    xxh     ; push vector number
 727     .byte 0x6a
 728     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 729     jmpCommonIdtEntry
 730 # No. 72
 731     pushl   $0x0    # push error code place holder on the stack
 732 #    push    xxh     ; push vector number
 733     .byte 0x6a
 734     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 735     jmpCommonIdtEntry
 736 # No. 73
 737     pushl   $0x0    # push error code place holder on the stack
 738 #    push    xxh     ; push vector number
 739     .byte 0x6a
 740     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 741     jmpCommonIdtEntry
 742 # No. 74
 743     pushl   $0x0    # push error code place holder on the stack
 744 #    push    xxh     ; push vector number
 745     .byte 0x6a
 746     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 747     jmpCommonIdtEntry
 748 # No. 75
 749     pushl   $0x0    # push error code place holder on the stack
 750 #    push    xxh     ; push vector number
 751     .byte 0x6a
 752     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 753     jmpCommonIdtEntry
 754 # No. 76
 755     pushl   $0x0    # push error code place holder on the stack
 756 #    push    xxh     ; push vector number
 757     .byte 0x6a
 758     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 759     jmpCommonIdtEntry
 760 # No. 77
 761     pushl   $0x0    # push error code place holder on the stack
 762 #    push    xxh     ; push vector number
 763     .byte 0x6a
 764     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 765     jmpCommonIdtEntry
 766 # No. 78
 767     pushl   $0x0    # push error code place holder on the stack
 768 #    push    xxh     ; push vector number
 769     .byte 0x6a
 770     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 771     jmpCommonIdtEntry
 772 # No. 79
 773     pushl   $0x0    # push error code place holder on the stack
 774 #    push    xxh     ; push vector number
 775     .byte 0x6a
 776     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 777     jmpCommonIdtEntry
 778 # No. 80
 779     pushl   $0x0    # push error code place holder on the stack
 780 #    push    xxh     ; push vector number
 781     .byte 0x6a
 782     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 783     jmpCommonIdtEntry
 784 # No. 81
 785     pushl   $0x0    # push error code place holder on the stack
 786 #    push    xxh     ; push vector number
 787     .byte 0x6a
 788     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 789     jmpCommonIdtEntry
 790 # No. 82
 791     pushl   $0x0    # push error code place holder on the stack
 792 #    push    xxh     ; push vector number
 793     .byte 0x6a
 794     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 795     jmpCommonIdtEntry
 796 # No. 83
 797     pushl   $0x0    # push error code place holder on the stack
 798 #    push    xxh     ; push vector number
 799     .byte 0x6a
 800     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 801     jmpCommonIdtEntry
 802 # No. 84
 803     pushl   $0x0    # push error code place holder on the stack
 804 #    push    xxh     ; push vector number
 805     .byte 0x6a
 806     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 807     jmpCommonIdtEntry
 808 # No. 85
 809     pushl   $0x0    # push error code place holder on the stack
 810 #    push    xxh     ; push vector number
 811     .byte 0x6a
 812     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 813     jmpCommonIdtEntry
 814 # No. 86
 815     pushl   $0x0    # push error code place holder on the stack
 816 #    push    xxh     ; push vector number
 817     .byte 0x6a
 818     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 819     jmpCommonIdtEntry
 820 # No. 87
 821     pushl   $0x0    # push error code place holder on the stack
 822 #    push    xxh     ; push vector number
 823     .byte 0x6a
 824     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 825     jmpCommonIdtEntry
 826 # No. 88
 827     pushl   $0x0    # push error code place holder on the stack
 828 #    push    xxh     ; push vector number
 829     .byte 0x6a
 830     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 831     jmpCommonIdtEntry
 832 # No. 89
 833     pushl   $0x0    # push error code place holder on the stack
 834 #    push    xxh     ; push vector number
 835     .byte 0x6a
 836     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 837     jmpCommonIdtEntry
 838 # No. 90
 839     pushl   $0x0    # push error code place holder on the stack
 840 #    push    xxh     ; push vector number
 841     .byte 0x6a
 842     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 843     jmpCommonIdtEntry
 844 # No. 91
 845     pushl   $0x0    # push error code place holder on the stack
 846 #    push    xxh     ; push vector number
 847     .byte 0x6a
 848     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 849     jmpCommonIdtEntry
 850 # No. 92
 851     pushl   $0x0    # push error code place holder on the stack
 852 #    push    xxh     ; push vector number
 853     .byte 0x6a
 854     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 855     jmpCommonIdtEntry
 856 # No. 93
 857     pushl   $0x0    # push error code place holder on the stack
 858 #    push    xxh     ; push vector number
 859     .byte 0x6a
 860     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 861     jmpCommonIdtEntry
 862 # No. 94
 863     pushl   $0x0    # push error code place holder on the stack
 864 #    push    xxh     ; push vector number
 865     .byte 0x6a
 866     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 867     jmpCommonIdtEntry
 868 # No. 95
 869     pushl   $0x0    # push error code place holder on the stack
 870 #    push    xxh     ; push vector number
 871     .byte 0x6a
 872     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 873     jmpCommonIdtEntry
 874 # No. 96
 875     pushl   $0x0    # push error code place holder on the stack
 876 #    push    xxh     ; push vector number
 877     .byte 0x6a
 878     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 879     jmpCommonIdtEntry
 880 # No. 97
 881     pushl   $0x0    # push error code place holder on the stack
 882 #    push    xxh     ; push vector number
 883     .byte 0x6a
 884     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 885     jmpCommonIdtEntry
 886 # No. 98
 887     pushl   $0x0    # push error code place holder on the stack
 888 #    push    xxh     ; push vector number
 889     .byte 0x6a
 890     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 891     jmpCommonIdtEntry
 892 # No. 99
 893     pushl   $0x0    # push error code place holder on the stack
 894 #    push    xxh     ; push vector number
 895     .byte 0x6a
 896     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 897     jmpCommonIdtEntry
 898 # No. 100
 899     pushl   $0x0    # push error code place holder on the stack
 900 #    push    xxh     ; push vector number
 901     .byte 0x6a
 902     .byte      ( . - INTUnknown - 3 ) / 9 + 20   # vector number
 903     jmpCommonIdtEntry
 904
 905
 906 commonIdtEntry:
 907     pushl   %eax
 908     pushl   %ecx
 909     pushl   %edx
 910     pushl   %ebx
 911     pushl   %esp
 912     pushl   %ebp
 913     pushl   %esi
 914     pushl   %edi
 915     .byte 0x41
 916     .byte 0x50
 917 #    push    r8
 918     .byte 0x41
 919     .byte 0x51
 920 #    push    r9
 921     .byte 0x41
 922     .byte 0x52
 923 #    push    r10
 924     .byte 0x41
 925     .byte 0x53
 926 #    push    r11
 927     .byte 0x41
 928     .byte 0x54
 929 #    push    r12
 930     .byte 0x41
 931     .byte 0x55
 932 #    push    r13
 933     .byte 0x41
 934     .byte 0x56
 935 #    push    r14
 936     .byte 0x41
 937     .byte 0x57
 938 #    push    r15
 939     .byte 0x48
 940     movl    %esp,%ebp
 941 #    mov     rbp, rsp
 942
 943 ##
 944 ##  At this point the stack looks like this:
 945 ##
 946 ##      Calling SS
 947 ##      Calling RSP
 948 ##      rflags
 949 ##      Calling CS
 950 ##      Calling RIP
 951 ##      Error code or 0
 952 ##      Int num or 0ffh for unknown int num
 953 ##      rax
 954 ##      rcx
 955 ##      rdx
 956 ##      rbx
 957 ##      rsp
 958 ##      rbp
 959 ##      rsi
 960 ##      rdi
 961 ##      r8
 962 ##      r9
 963 ##      r10
 964 ##      r11
 965 ##      r12
 966 ##      r13
 967 ##      r14
 968 ##      r15 <------- RSP, RBP
 969 ##
 970
 971     call    ClearScreen
 972     movl    $String1, %esi
 973     call    PrintString
 974     .byte 0x48
 975     movl    16*8(%ebp),%eax       ## move Int number into RAX
 976     .byte 0x48
 977     cmpl    $18,%eax
 978     ja      PrintDefaultString
 979 PrintExceptionString:
 980     shll    $3,%eax             ## multiply by 8 to get offset from StringTable to actual string address
 981     addl    $StringTable, %eax
 982     movl    (%eax),%esi
 983     jmp     PrintTheString
 984 PrintDefaultString:
 985     movl    $IntUnknownString, %esi
 986     # patch Int number
 987     movl    %eax,%edx
 988     call    A2C
 989     movb    %al,1(%esi)
 990     movl    %edx,%eax
 991     shrl    $4,%eax
 992     call    A2C
 993     movb    %al,(%esi)
 994 PrintTheString:
 995     call    PrintString
 996     movl    $String2, %esi
 997     call    PrintString
 998     .byte 0x48
 999     movl    19*8(%ebp),%eax    # CS
1000     call    PrintQword
1001     movb    $':', %al
1002     movb    %al, (%edi)
1003     addl    $2,%edi
1004     .byte 0x48
1005     movl    18*8(%ebp),%eax    # RIP
1006     call    PrintQword
1007     movl    $String3, %esi
1008     call    PrintString
1009
1010     movl    $0xb8140,%edi
1011
1012     movl    $StringRax, %esi
1013     call    PrintString
1014     .byte 0x48
1015     movl    15*8(%ebp),%eax
1016     call    PrintQword
1017
1018     movl    $StringRcx, %esi
1019     call    PrintString
1020     .byte 0x48
1021     movl    14*8(%ebp),%eax
1022     call    PrintQword
1023
1024     movl    $StringRdx, %esi
1025     call    PrintString
1026     .byte 0x48
1027     movl    13*8(%ebp),%eax
1028     call    PrintQword
1029
1030     movl    $0xb81e0,%edi
1031
1032     movl    $StringRbx, %esi
1033     call    PrintString
1034     .byte 0x48
1035     movl    12*8(%ebp),%eax
1036     call    PrintQword
1037
1038     movl    $StringRsp, %esi
1039     call    PrintString
1040     .byte 0x48
1041     movl    21*8(%ebp),%eax
1042     call    PrintQword
1043
1044     movl    $StringRbp, %esi
1045     call    PrintString
1046     .byte 0x48
1047     movl    10*8(%ebp),%eax
1048     call    PrintQword
1049
1050     movl    $0xb8280,%edi
1051
1052     movl    $StringRsi, %esi
1053     call    PrintString
1054     .byte 0x48
1055     movl    9*8(%ebp),%eax
1056     call    PrintQword
1057
1058     movl    $StringRdi, %esi
1059     call    PrintString
1060     .byte 0x48
1061     movl    8*8(%ebp),%eax
1062     call    PrintQword
1063
1064     movl    $StringEcode, %esi
1065     call    PrintString
1066     .byte 0x48
1067     movl    17*8(%ebp),%eax
1068     call    PrintQword
1069
1070     movl    $0xb8320,%edi
1071
1072     movl    $StringR8, %esi
1073     call    PrintString
1074     .byte 0x48
1075     movl    7*8(%ebp),%eax
1076     call    PrintQword
1077
1078     movl    $StringR9, %esi
1079     call    PrintString
1080     .byte 0x48
1081     movl    6*8(%ebp),%eax
1082     call    PrintQword
1083
1084     movl    $StringR10, %esi
1085     call    PrintString
1086     .byte 0x48
1087     movl    5*8(%ebp),%eax
1088     call    PrintQword
1089
1090     movl    $0xb83c0,%edi
1091
1092     movl    $StringR11, %esi
1093     call    PrintString
1094     .byte 0x48
1095     movl    4*8(%ebp),%eax
1096     call    PrintQword
1097
1098     movl    $StringR12, %esi
1099     call    PrintString
1100     .byte 0x48
1101     movl    3*8(%ebp),%eax
1102     call    PrintQword
1103
1104     movl    $StringR13, %esi
1105     call    PrintString
1106     .byte 0x48
1107     movl    2*8(%ebp),%eax
1108     call    PrintQword
1109
1110     movl    $0xb8460,%edi
1111
1112     movl    $StringR14, %esi
1113     call    PrintString
1114     .byte 0x48
1115     movl    1*8(%ebp),%eax
1116     call    PrintQword
1117
1118     movl    $StringR15, %esi
1119     call    PrintString
1120     .byte 0x48
1121     movl    0*8(%ebp),%eax
1122     call    PrintQword
1123
1124     movl    $StringSs, %esi
1125     call    PrintString
1126     .byte 0x48
1127     movl    22*8(%ebp),%eax
1128     call    PrintQword
1129
1130     movl    $0xb8500,%edi
1131
1132     movl    $StringRflags, %esi
1133     call    PrintString
1134     .byte 0x48
1135     movl    20*8(%ebp),%eax
1136     call    PrintQword
1137
1138     movl    $0xb8640,%edi
1139
1140     movl    %ebp,%esi
1141     addl    $23*8,%esi
1142     movl    $4,%ecx
1143
1144
1145 OuterLoop:
1146     pushl   %ecx
1147     movl    $4,%ecx
1148     .byte 0x48
1149     movl    %edi,%edx
1150
1151 InnerLoop:
1152     .byte 0x48
1153     movl    (%esi),%eax
1154     call    PrintQword
1155     addl    $8,%esi
1156     movb    $0x20, %al       # blank character
1157     movb    %al,(%edi)
1158     addl    $2,%edi
1159     loop    InnerLoop
1160
1161     popl    %ecx
1162     addl    $0xa0,%edx
1163     movl    %edx,%edi
1164     loop    OuterLoop
1165
1166
1167     movl    $0xb8960,%edi
1168
1169     .byte 0x48
1170     movl    18*8(%ebp),%eax  # RIP
1171     subl    $8*8,%eax
1172     .byte 0x48
1173     movl    %eax,%esi       # esi = rip - 8 QWORD linear (total 16 QWORD)
1174
1175     movl    $4,%ecx
1176
1177 OuterLoop1:
1178     pushl   %ecx
1179     movl    $4,%ecx
1180     movl    %edi,%edx
1181
1182 InnerLoop1:
1183     .byte 0x48
1184     movl    (%esi),%eax
1185     call    PrintQword
1186     addl    $8,%esi
1187     movb    $0x20, %al     # blank character
1188     movb    %al,(%edi)
1189     addl    $2,%edi
1190     loop    InnerLoop1
1191
1192     popl    %ecx
1193     addl    $0xa0,%edx
1194     movl    %edx,%edi
1195     loop    OuterLoop1
1196
1197
1198
1199     #wbinvd
1200 LN_C1:
1201     jmp     LN_C1
1202
1203 #
1204 # return
1205 #
1206     movl    %ebp,%esp
1207 #    mov     rsp, rbp
1208     .byte 0x41
1209     .byte 0x5f
1210 #    pop    r15
1211     .byte 0x41
1212     .byte 0x5e
1213 #    pop    r14
1214     .byte 0x41
1215     .byte 0x5d
1216 #    pop    r13
1217     .byte 0x41
1218     .byte 0x5c
1219 #    pop    r12
1220     .byte 0x41
1221     .byte 0x5b
1222 #    pop    r11
1223     .byte 0x41
1224     .byte 0x5a
1225 #    pop    r10
1226     .byte 0x41
1227     .byte 0x59
1228 #    pop    r9
1229     .byte 0x41
1230     .byte 0x58
1231 #    pop    r8
1232     popl   %edi
1233     popl   %esi
1234     popl   %ebp
1235     popl   %eax # esp
1236     popl   %ebx
1237     popl   %edx
1238     popl   %ecx
1239     popl   %eax
1240
1241     .byte 0x48
1242     .byte 0x83
1243     .byte 0xc4
1244     .byte 0x10
1245 #    add    esp, 16 ; error code and INT number
1246
1247     .byte 0x48
1248     .byte 0xcf
1249 #    iretq
1250
1251 PrintString:
1252     pushl   %eax
1253 LN_C2:
1254     movb    (%esi), %al
1255     cmpb    $0,%al
1256     je      LN_C3
1257     movb    %al, (%edi)
1258     .byte 0xff
1259     .byte 0xc6
1260 #    inc     esi
1261     addl    $2,%edi
1262     jmp     LN_C2
1263 LN_C3:
1264     popl    %eax
1265     ret
1266
1267 ## RAX contains qword to print
1268 ## RDI contains memory location (screen location) to print it to
1269 PrintQword:
1270     pushl   %ecx
1271     pushl   %ebx
1272     pushl   %eax
1273
1274     .byte 0x48
1275     .byte 0xc7
1276     .byte 0xc1
1277     .long 16
1278 #    mov     rcx, 16
1279 looptop:
1280     .byte 0x48
1281     roll    $4,%eax
1282     movb    %al,%bl
1283     andb    $0xf,%bl
1284     addb    $'0', %bl
1285     cmpb    $'9', %bl
1286     jle     LN_C4
1287     addb    $7,%bl
1288 LN_C4:
1289     movb %bl, (%edi)
1290     addl    $2,%edi
1291     loop    looptop
1292     #wbinvd
1293
1294     popl    %eax
1295     popl    %ebx
1296     popl    %ecx
1297     ret
1298
1299 ClearScreen:
1300     pushl   %eax
1301     pushl   %ecx
1302
1303     movb    $0x20, %al       # blank character
1304     movb    $0xc,%ah
1305     movl    $0xb8000,%edi
1306     movl    $80*24,%ecx
1307 LN_C5:
1308     movw    %ax, (%edi)
1309     addl    $2,%edi
1310     loop    LN_C5
1311     movl    $0xb8000,%edi
1312
1313     popl    %ecx
1314     popl    %eax
1315
1316     ret
1317
1318 A2C:
1319     andb    $0xf,%al
1320     addb    $'0', %al
1321     cmpb    $'9', %al
1322     jle     LN_C6
1323     addb    $7,%al
1324 LN_C6:
1325     ret
1326
1327 String1:            .asciz      "*** INT "
1328
1329 Int0String:         .asciz      "00h Divide by 0 -"
1330 Int1String:         .asciz      "01h Debug exception -"
1331 Int2String:         .asciz      "02h NMI -"
1332 Int3String:         .asciz      "03h Breakpoint -"
1333 Int4String:         .asciz      "04h Overflow -"
1334 Int5String:         .asciz      "05h Bound -"
1335 Int6String:         .asciz      "06h Invalid opcode -"
1336 Int7String:         .asciz      "07h Device not available -"
1337 Int8String:         .asciz      "08h Double fault -"
1338 Int9String:         .asciz      "09h Coprocessor seg overrun (reserved) -"
1339 Int10String:        .asciz      "0Ah Invalid TSS -"
1340 Int11String:        .asciz      "0Bh Segment not present -"
1341 Int12String:        .asciz      "0Ch Stack fault -"
1342 Int13String:        .asciz      "0Dh General protection fault -"
1343 Int14String:        .asciz      "0Eh Page fault -"
1344 Int15String:        .asciz      "0Fh (Intel reserved) -"
1345 Int16String:        .asciz      "10h Floating point error -"
1346 Int17String:        .asciz      "11h Alignment check -"
1347 Int18String:        .asciz      "12h Machine check -"
1348 Int19String:        .asciz      "13h SIMD Floating-Point Exception -"
1349 IntUnknownString:   .asciz      "??h Unknown interrupt -"
1350
1351 StringTable:   .long  Int0String, 0, Int1String, 0, Int2String, 0, Int3String, 0,  \
1352                       Int4String, 0, Int5String, 0, Int6String, 0, Int7String, 0,  \
1353                       Int8String, 0, Int9String, 0, Int10String, 0, Int11String, 0,  \
1354                       Int12String, 0, Int13String, 0, Int14String, 0, Int15String, 0,  \
1355                       Int16String, 0, Int17String, 0, Int18String, 0, Int19String, 0
1356
1357 String2:           .asciz  " HALT!! *** ("
1358 String3:           .asciz  ")"
1359 StringRax:         .asciz  "RAX="
1360 StringRcx:         .asciz  " RCX="
1361 StringRdx:         .asciz  " RDX="
1362 StringRbx:         .asciz  "RBX="
1363 StringRsp:         .asciz  " RSP="
1364 StringRbp:         .asciz  " RBP="
1365 StringRsi:         .asciz  "RSI="
1366 StringRdi:         .asciz  " RDI="
1367 StringEcode:       .asciz  " ECODE="
1368 StringR8:          .asciz  "R8 ="
1369 StringR9:          .asciz  " R9 ="
1370 StringR10:         .asciz  " R10="
1371 StringR11:         .asciz  "R11="
1372 StringR12:         .asciz  " R12="
1373 StringR13:         .asciz  " R13="
1374 StringR14:         .asciz  "R14="
1375 StringR15:         .asciz  " R15="
1376 StringSs:          .asciz  " SS ="
1377 StringRflags:      .asciz  "RFLAGS="
1378
1379 Idtr:        .float  0
1380             .float  0
1381
1382     .org 0x21ffe
1383 BlockSignature:
1384     .word 0xaa55
1385