mirror of https://github.com/acidanthera/audk.git
788 lines
20 KiB
NASM
788 lines
20 KiB
NASM
;------------------------------------------------------------------------------
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;*
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;* Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
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;* This program and the accompanying materials
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;* are licensed and made available under the terms and conditions of the BSD License
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;* which accompanies this distribution. The full text of the license may be found at
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;* http://opensource.org/licenses/bsd-license.php
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;*
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;* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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;* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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;*
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;* efi64.asm
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;*
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;* Abstract:
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;*
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;------------------------------------------------------------------------------
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; Now in 64-bit long mode.
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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.486
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.model flat
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.stack
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.code
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org 21000h
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DEFAULT_HANDLER_SIZE EQU INT1 - INT0
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JmpCommonIdtEntry macro
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; jmp commonIdtEntry - this must be hand coded to keep the assembler from
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; using a 8 bit reletive jump when the entries are
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; within 255 bytes of the common entry. This must
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; be done to maintain the consistency of the size
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; of entry points...
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db 0e9h ; jmp 16 bit reletive
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dd commonIdtEntry - $ - 4 ; offset to jump to
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endm
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Start:
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mov esp,0001fffe8h ; make final stack aligned
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; set OSFXSR and OSXMMEXCPT because some code will use XMM register
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db 0fh
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db 20h
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db 0e0h
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; mov rax, cr4
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bts eax, 9
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bts eax, 0ah
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db 0fh
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db 22h
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db 0e0h
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; mov cr4, rax
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call ClearScreen
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; Populate IDT with meaningful offsets for exception handlers...
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mov eax, offset Idtr
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sidt fword ptr [eax] ; get fword address of IDT
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mov eax, offset Halt
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mov ebx, eax ; use bx to copy 15..0 to descriptors
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shr eax, 16 ; use ax to copy 31..16 to descriptors
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; 63..32 of descriptors is 0
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mov ecx, 78h ; 78h IDT entries to initialize with unique entry points (exceptions)
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mov esi, [offset Idtr + 2]
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mov edi, [esi]
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@@: ; loop through all IDT entries exception handlers and initialize to default handler
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mov word ptr [edi], bx ; write bits 15..0 of offset
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mov word ptr [edi+2], 38h ; SYS_CODE64_SEL from GDT
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mov word ptr [edi+4], 0e00h OR 8000h ; type = 386 interrupt gate, present
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mov word ptr [edi+6], ax ; write bits 31..16 of offset
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mov dword ptr [edi+8], 0 ; write bits 63..32 of offset
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add edi, 16 ; move up to next descriptor
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add bx, DEFAULT_HANDLER_SIZE ; move to next entry point
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loop @b ; loop back through again until all descriptors are initialized
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;; at this point edi contains the offset of the descriptor for INT 20
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;; and bx contains the low 16 bits of the offset of the default handler
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;; so initialize all the rest of the descriptors with these two values...
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; mov ecx, 101 ; there are 100 descriptors left (INT 20 (14h) - INT 119 (77h)
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;@@: ; loop through all IDT entries exception handlers and initialize to default handler
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; mov word ptr [edi], bx ; write bits 15..0 of offset
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; mov word ptr [edi+2], 38h ; SYS_CODE64_SEL from GDT
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; mov word ptr [edi+4], 0e00h OR 8000h ; type = 386 interrupt gate, present
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; mov word ptr [edi+6], ax ; write bits 31..16 of offset
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; mov dword ptr [edi+8], 0 ; write bits 63..32 of offset
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; add edi, 16 ; move up to next descriptor
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; loop @b ; loop back through again until all descriptors are initialized
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;; DUMP location of IDT and several of the descriptors
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; mov ecx, 8
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; mov eax, [offset Idtr + 2]
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; mov eax, [eax]
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; mov edi, 0b8000h
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; call PrintQword
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; mov esi, eax
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; mov edi, 0b80a0h
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; jmp OuterLoop
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;;
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;; just for fun, let's do a software interrupt to see if we correctly land in the exception handler...
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; mov eax, 011111111h
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; mov ebx, 022222222h
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; mov ecx, 033333333h
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; mov edx, 044444444h
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; mov ebp, 055555555h
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; mov esi, 066666666h
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; mov edi, 077777777h
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; push 011111111h
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; push 022222222h
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; push 033333333h
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; int 119
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mov esi,022000h ; esi = 22000
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mov eax,[esi+014h] ; eax = [22014]
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add esi,eax ; esi = 22000 + [22014] = Base of EFILDR.C
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mov ebp,[esi+03ch] ; ebp = [22000 + [22014] + 3c] = NT Image Header for EFILDR.C
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add ebp,esi
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mov edi,[ebp+030h] ; edi = [[22000 + [22014] + 3c] + 2c] = ImageBase (63..32 is zero, ignore)
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mov eax,[ebp+028h] ; eax = [[22000 + [22014] + 3c] + 24] = EntryPoint
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add eax,edi ; eax = ImageBase + EntryPoint
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mov ebx, offset EfiLdrOffset
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mov dword ptr [ebx],eax ; Modify far jump instruction for correct entry point
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mov bx,word ptr[ebp+6] ; bx = Number of sections
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xor eax,eax
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mov ax,word ptr[ebp+014h] ; ax = Optional Header Size
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add ebp,eax
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add ebp,018h ; ebp = Start of 1st Section
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SectionLoop:
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push esi ; Save Base of EFILDR.C
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push edi ; Save ImageBase
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add esi,[ebp+014h] ; esi = Base of EFILDR.C + PointerToRawData
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add edi,[ebp+00ch] ; edi = ImageBase + VirtualAddress
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mov ecx,[ebp+010h] ; ecs = SizeOfRawData
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cld
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shr ecx,2
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rep movsd
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pop edi ; Restore ImageBase
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pop esi ; Restore Base of EFILDR.C
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add bp,028h ; ebp = ebp + 028h = Pointer to next section record
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db 66h
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db 0ffh
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db 0cbh
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; dec bx
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cmp bx,0
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jne SectionLoop
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mov edx, offset Idtr
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movzx eax, word ptr [edx] ; get size of IDT
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db 0ffh
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db 0c0h
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; inc eax
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add eax, dword ptr [edx + 2] ; add to base of IDT to get location of memory map...
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xor ecx, ecx
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mov ecx, eax ; put argument to RCX
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db 48h
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db 0c7h
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db 0c0h
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EfiLdrOffset:
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dd 000401000h ; Offset of EFILDR
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; mov rax, 401000h
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db 50h
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; push rax
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; ret
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db 0c3h
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; db "**** DEFAULT IDT ENTRY ***",0
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align 02h
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Halt:
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INT0:
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push 0h ; push error code place holder on the stack
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push 0h
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JmpCommonIdtEntry
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; db 0e9h ; jmp 16 bit reletive
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; dd commonIdtEntry - $ - 4 ; offset to jump to
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INT1:
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push 0h ; push error code place holder on the stack
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push 1h
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JmpCommonIdtEntry
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INT2:
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push 0h ; push error code place holder on the stack
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push 2h
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JmpCommonIdtEntry
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INT3:
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push 0h ; push error code place holder on the stack
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push 3h
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JmpCommonIdtEntry
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INT4:
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push 0h ; push error code place holder on the stack
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push 4h
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JmpCommonIdtEntry
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INT5:
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push 0h ; push error code place holder on the stack
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push 5h
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JmpCommonIdtEntry
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INT6:
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push 0h ; push error code place holder on the stack
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push 6h
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JmpCommonIdtEntry
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INT7:
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push 0h ; push error code place holder on the stack
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push 7h
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JmpCommonIdtEntry
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INT8:
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; Double fault causes an error code to be pushed so no phony push necessary
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nop
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nop
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push 8h
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JmpCommonIdtEntry
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INT9:
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push 0h ; push error code place holder on the stack
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push 9h
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JmpCommonIdtEntry
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INT10:
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; Invalid TSS causes an error code to be pushed so no phony push necessary
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nop
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nop
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push 10
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JmpCommonIdtEntry
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INT11:
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; Segment Not Present causes an error code to be pushed so no phony push necessary
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nop
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nop
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push 11
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JmpCommonIdtEntry
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INT12:
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; Stack fault causes an error code to be pushed so no phony push necessary
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nop
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nop
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push 12
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JmpCommonIdtEntry
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INT13:
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; GP fault causes an error code to be pushed so no phony push necessary
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nop
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nop
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push 13
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JmpCommonIdtEntry
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INT14:
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; Page fault causes an error code to be pushed so no phony push necessary
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nop
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nop
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push 14
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JmpCommonIdtEntry
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INT15:
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push 0h ; push error code place holder on the stack
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push 15
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JmpCommonIdtEntry
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INT16:
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push 0h ; push error code place holder on the stack
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push 16
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JmpCommonIdtEntry
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INT17:
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; Alignment check causes an error code to be pushed so no phony push necessary
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nop
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nop
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push 17
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JmpCommonIdtEntry
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INT18:
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push 0h ; push error code place holder on the stack
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push 18
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JmpCommonIdtEntry
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INT19:
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push 0h ; push error code place holder on the stack
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push 19
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JmpCommonIdtEntry
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INTUnknown:
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REPEAT (78h - 20)
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push 0h ; push error code place holder on the stack
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; push xxh ; push vector number
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db 06ah
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db ( $ - INTUnknown - 3 ) / 9 + 20 ; vector number
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JmpCommonIdtEntry
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ENDM
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commonIdtEntry:
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push eax
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push ecx
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push edx
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push ebx
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push esp
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push ebp
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push esi
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push edi
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db 41h
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db 50h
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; push r8
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db 41h
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db 51h
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; push r9
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db 41h
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db 52h
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; push r10
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db 41h
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db 53h
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; push r11
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db 41h
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db 54h
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; push r12
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db 41h
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db 55h
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; push r13
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db 41h
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db 56h
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; push r14
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db 41h
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db 57h
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; push r15
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db 48h
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mov ebp, esp
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; mov rbp, rsp
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;;
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;; At this point the stack looks like this:
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;;
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;; Calling SS
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;; Calling RSP
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;; rflags
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;; Calling CS
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;; Calling RIP
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;; Error code or 0
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;; Int num or 0ffh for unknown int num
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;; rax
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;; rcx
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;; rdx
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;; rbx
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;; rsp
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;; rbp
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;; rsi
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;; rdi
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;; r8
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;; r9
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;; r10
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;; r11
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;; r12
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;; r13
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;; r14
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;; r15 <------- RSP, RBP
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;;
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call ClearScreen
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mov esi, offset String1
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call PrintString
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db 48h
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mov eax, [ebp + 16*8] ;; move Int number into RAX
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db 48h
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cmp eax, 18
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ja PrintDefaultString
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PrintExceptionString:
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shl eax, 3 ;; multiply by 8 to get offset from StringTable to actual string address
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add eax, offset StringTable
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mov esi, [eax]
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jmp PrintTheString
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PrintDefaultString:
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mov esi, offset IntUnknownString
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; patch Int number
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mov edx, eax
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call A2C
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mov [esi + 1], al
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mov eax, edx
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shr eax, 4
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call A2C
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mov [esi], al
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PrintTheString:
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call PrintString
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mov esi, offset String2
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call PrintString
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db 48h
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mov eax, [ebp+19*8] ; CS
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call PrintQword
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mov al, ':'
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mov byte ptr [edi], al
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add edi, 2
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db 48h
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mov eax, [ebp+18*8] ; RIP
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call PrintQword
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mov esi, offset String3
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call PrintString
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mov edi, 0b8140h
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mov esi, offset StringRax ; rax
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call PrintString
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db 48h
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mov eax, [ebp+15*8]
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call PrintQword
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mov esi, offset StringRcx ; rcx
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call PrintString
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db 48h
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mov eax, [ebp+14*8]
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call PrintQword
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mov esi, offset StringRdx ; rdx
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call PrintString
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db 48h
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mov eax, [ebp+13*8]
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call PrintQword
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mov edi, 0b81e0h
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mov esi, offset StringRbx ; rbx
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call PrintString
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db 48h
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mov eax, [ebp+12*8]
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call PrintQword
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mov esi, offset StringRsp ; rsp
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call PrintString
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db 48h
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mov eax, [ebp+21*8]
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call PrintQword
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mov esi, offset StringRbp ; rbp
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call PrintString
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db 48h
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mov eax, [ebp+10*8]
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call PrintQword
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mov edi, 0b8280h
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mov esi, offset StringRsi ; rsi
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call PrintString
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db 48h
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mov eax, [ebp+9*8]
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call PrintQword
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mov esi, offset StringRdi ; rdi
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call PrintString
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db 48h
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mov eax, [ebp+8*8]
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call PrintQword
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mov esi, offset StringEcode ; error code
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call PrintString
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db 48h
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mov eax, [ebp+17*8]
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call PrintQword
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mov edi, 0b8320h
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mov esi, offset StringR8 ; r8
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call PrintString
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db 48h
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mov eax, [ebp+7*8]
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call PrintQword
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mov esi, offset StringR9 ; r9
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call PrintString
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db 48h
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mov eax, [ebp+6*8]
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call PrintQword
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mov esi, offset StringR10 ; r10
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call PrintString
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db 48h
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mov eax, [ebp+5*8]
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call PrintQword
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mov edi, 0b83c0h
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mov esi, offset StringR11 ; r11
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call PrintString
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db 48h
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mov eax, [ebp+4*8]
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call PrintQword
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mov esi, offset StringR12 ; r12
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call PrintString
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db 48h
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mov eax, [ebp+3*8]
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call PrintQword
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mov esi, offset StringR13 ; r13
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call PrintString
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db 48h
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mov eax, [ebp+2*8]
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call PrintQword
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mov edi, 0b8460h
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mov esi, offset StringR14 ; r14
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call PrintString
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db 48h
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mov eax, [ebp+1*8]
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call PrintQword
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mov esi, offset StringR15 ; r15
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call PrintString
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db 48h
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mov eax, [ebp+0*8]
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call PrintQword
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mov esi, offset StringSs ; ss
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call PrintString
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db 48h
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mov eax, [ebp+22*8]
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call PrintQword
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mov edi, 0b8500h
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mov esi, offset StringRflags ; rflags
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call PrintString
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db 48h
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mov eax, [ebp+20*8]
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call PrintQword
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mov edi, 0b8640h
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mov esi, ebp
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add esi, 23*8
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mov ecx, 4
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OuterLoop:
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push ecx
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mov ecx, 4
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db 48h
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mov edx, edi
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InnerLoop:
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db 48h
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mov eax, [esi]
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call PrintQword
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add esi, 8
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mov al, ' '
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mov [edi], al
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add edi, 2
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loop InnerLoop
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pop ecx
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add edx, 0a0h
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mov edi, edx
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loop OuterLoop
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mov edi, 0b8960h
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db 48h
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mov eax, [ebp+18*8] ; RIP
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sub eax, 8 * 8
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db 48h
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mov esi, eax ; esi = rip - 8 QWORD linear (total 16 QWORD)
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mov ecx, 4
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OuterLoop1:
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push ecx
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mov ecx, 4
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mov edx, edi
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InnerLoop1:
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db 48h
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mov eax, [esi]
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call PrintQword
|
|
add esi, 8
|
|
mov al, ' '
|
|
mov [edi], al
|
|
add edi, 2
|
|
loop InnerLoop1
|
|
|
|
pop ecx
|
|
add edx, 0a0h
|
|
mov edi, edx
|
|
loop OuterLoop1
|
|
|
|
|
|
|
|
;wbinvd
|
|
@@:
|
|
jmp @b
|
|
|
|
;
|
|
; return
|
|
;
|
|
mov esp, ebp
|
|
; mov rsp, rbp
|
|
db 41h
|
|
db 5fh
|
|
; pop r15
|
|
db 41h
|
|
db 5eh
|
|
; pop r14
|
|
db 41h
|
|
db 5dh
|
|
; pop r13
|
|
db 41h
|
|
db 5ch
|
|
; pop r12
|
|
db 41h
|
|
db 5bh
|
|
; pop r11
|
|
db 41h
|
|
db 5ah
|
|
; pop r10
|
|
db 41h
|
|
db 59h
|
|
; pop r9
|
|
db 41h
|
|
db 58h
|
|
; pop r8
|
|
pop edi
|
|
pop esi
|
|
pop ebp
|
|
pop eax ; esp
|
|
pop ebx
|
|
pop edx
|
|
pop ecx
|
|
pop eax
|
|
|
|
db 48h
|
|
db 83h
|
|
db 0c4h
|
|
db 10h
|
|
; add esp, 16 ; error code and INT number
|
|
|
|
db 48h
|
|
db 0cfh
|
|
; iretq
|
|
|
|
PrintString:
|
|
push eax
|
|
@@:
|
|
mov al, byte ptr [esi]
|
|
cmp al, 0
|
|
je @f
|
|
mov byte ptr [edi], al
|
|
db 0ffh
|
|
db 0c6h
|
|
; inc esi
|
|
add edi, 2
|
|
jmp @b
|
|
@@:
|
|
pop eax
|
|
ret
|
|
|
|
;; RAX contains qword to print
|
|
;; RDI contains memory location (screen location) to print it to
|
|
PrintQword:
|
|
push ecx
|
|
push ebx
|
|
push eax
|
|
|
|
db 48h
|
|
db 0c7h
|
|
db 0c1h
|
|
dd 16
|
|
; mov rcx, 16
|
|
looptop:
|
|
db 48h
|
|
rol eax, 4
|
|
mov bl, al
|
|
and bl, 0fh
|
|
add bl, '0'
|
|
cmp bl, '9'
|
|
jle @f
|
|
add bl, 7
|
|
@@:
|
|
mov byte ptr [edi], bl
|
|
add edi, 2
|
|
loop looptop
|
|
;wbinvd
|
|
|
|
pop eax
|
|
pop ebx
|
|
pop ecx
|
|
ret
|
|
|
|
ClearScreen:
|
|
push eax
|
|
push ecx
|
|
|
|
mov al, ' '
|
|
mov ah, 0ch
|
|
mov edi, 0b8000h
|
|
mov ecx, 80 * 24
|
|
@@:
|
|
mov word ptr [edi], ax
|
|
add edi, 2
|
|
loop @b
|
|
mov edi, 0b8000h
|
|
|
|
pop ecx
|
|
pop eax
|
|
|
|
ret
|
|
|
|
A2C:
|
|
and al, 0fh
|
|
add al, '0'
|
|
cmp al, '9'
|
|
jle @f
|
|
add al, 7
|
|
@@:
|
|
ret
|
|
|
|
String1 db "*** INT ",0
|
|
|
|
Int0String db "00h Divide by 0 -",0
|
|
Int1String db "01h Debug exception -",0
|
|
Int2String db "02h NMI -",0
|
|
Int3String db "03h Breakpoint -",0
|
|
Int4String db "04h Overflow -",0
|
|
Int5String db "05h Bound -",0
|
|
Int6String db "06h Invalid opcode -",0
|
|
Int7String db "07h Device not available -",0
|
|
Int8String db "08h Double fault -",0
|
|
Int9String db "09h Coprocessor seg overrun (reserved) -",0
|
|
Int10String db "0Ah Invalid TSS -",0
|
|
Int11String db "0Bh Segment not present -",0
|
|
Int12String db "0Ch Stack fault -",0
|
|
Int13String db "0Dh General protection fault -",0
|
|
Int14String db "0Eh Page fault -",0
|
|
Int15String db "0Fh (Intel reserved) -",0
|
|
Int16String db "10h Floating point error -",0
|
|
Int17String db "11h Alignment check -",0
|
|
Int18String db "12h Machine check -",0
|
|
Int19String db "13h SIMD Floating-Point Exception -",0
|
|
IntUnknownString db "??h Unknown interrupt -",0
|
|
|
|
StringTable dq offset Int0String, offset Int1String, offset Int2String, offset Int3String,
|
|
offset Int4String, offset Int5String, offset Int6String, offset Int7String,
|
|
offset Int8String, offset Int9String, offset Int10String, offset Int11String,
|
|
offset Int12String, offset Int13String, offset Int14String, offset Int15String,
|
|
offset Int16String, offset Int17String, offset Int18String, offset Int19String
|
|
|
|
String2 db " HALT!! *** (",0
|
|
String3 db ")",0
|
|
StringRax db "RAX=",0
|
|
StringRcx db " RCX=",0
|
|
StringRdx db " RDX=",0
|
|
StringRbx db "RBX=",0
|
|
StringRsp db " RSP=",0
|
|
StringRbp db " RBP=",0
|
|
StringRsi db "RSI=",0
|
|
StringRdi db " RDI=",0
|
|
StringEcode db " ECODE=",0
|
|
StringR8 db "R8 =",0
|
|
StringR9 db " R9 =",0
|
|
StringR10 db " R10=",0
|
|
StringR11 db "R11=",0
|
|
StringR12 db " R12=",0
|
|
StringR13 db " R13=",0
|
|
StringR14 db "R14=",0
|
|
StringR15 db " R15=",0
|
|
StringSs db " SS =",0
|
|
StringRflags db "RFLAGS=",0
|
|
|
|
Idtr df 0
|
|
df 0
|
|
|
|
org 21ffeh
|
|
BlockSignature:
|
|
dw 0aa55h
|
|
|
|
end
|