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flat assembler > Windows > Iczelion's Tutorial #2 Win64 fasm format

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yeohhs



Joined: 19 Jan 2004
Posts: 170
Location: N 5.43564° E 100.3091°
Code:

format PE64 GUI 5.0
entry start

include 'win64a.inc'

section '.text' code readable executable

  start:
        sub     rsp,8*5
        invoke  MessageBox, NULL, MsgBoxText, MsgCaption, MB_OK
        invoke  ExitProcess, NULL

section '.data' data readable writeable

  MsgCaption db "Iczelion's Tutorial #2",0
  MsgBoxText db "Win64 Assembly is Great!",0

section '.idata' import data readable writeable

  library kernel32,'KERNEL32.DLL',\
          user32,'USER32.DLL'

  include 'api\kernel32.inc'
  include 'api\user32.inc'
    
Post 04 Jan 2018, 05:40
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Mikl___



Joined: 30 Dec 2014
Posts: 86
Code:
format binary as "exe"
include "d:\fasm\include\win64a.inc"
struc dbs [data]
{ 
  common 
  . db data 
  .size = $ - . 
}

IMAGE_DOS_SIGNATURE             equ 5A4Dh
IMAGE_NT_SIGNATURE              equ 00004550h
PROCESSOR_AMD_X8664             equ 8664h
IMAGE_SCN_CNT_CODE              equ 00000020h
IMAGE_SCN_MEM_WRITE             equ 80000000h
IMAGE_SCN_MEM_READ              equ 40000000h
IMAGE_SCN_CNT_INITIALIZED_DATA  equ 00000040h
IMAGE_SUBSYSTEM_WINDOWS_GUI     equ 2
IMAGE_NT_OPTIONAL_HDR64_MAGIC   equ 20Bh
IMAGE_FILE_RELOCS_STRIPPED      equ 1
IMAGE_FILE_EXECUTABLE_IMAGE     equ 2
IMAGE_BASE                      equ 0x400000
align1                          equ 4
use64
org 0
;--------DOS-stub-------------------------------
Signature               dw IMAGE_DOS_SIGNATURE,0
;-------PE-заголовок--------------------------------------------------
ntHeader                dd IMAGE_NT_SIGNATURE;'PE'
;image_header----Файловый заголовок
Machine                 dw PROCESSOR_AMD_X8664;7Ch;Тип центрального процессора
Count_of_section        dw 1;7Eh;Количество секций
TimeStump               dd 0;80h;Информация о времени, когда был собран данный PE-файл
Symbol_table_offset     dd 0;84h;Указатель на размер отладочной информации
Symbol_table_count      dd 0;88h;Указатель на COFF-таблицу символов PE-формата
Size_of_optional_header dw section_table-optional_header;F0;8Ch;Размер опционального заголовка
Characteristics         dw IMAGE_FILE_RELOCS_STRIPPED or IMAGE_FILE_EXECUTABLE_IMAGE;3;7Eh;Атрибуты файла
;-------Стандартные поля NT
optional_header:
Magic_optional_header   dw IMAGE_NT_OPTIONAL_HDR64_MAGIC;20Bh;90h;Состояние отображаемого файла
Linker_version_major_and_minor db 14,11;92h;Содержат версию линковщика, создавшего данный файл
Size_of_code            dd Import_Table-begin;60h;94h;230h-1D0h;Суммарный размер секций кода
Size_of_init_data       dd 0x70;Суммарный размер инициализированных данных
Size_of_uninit_data     dd 0;Суммарный размер неинициализированных данных
entry_point             dd start;20Ah;0A0h
base_of_code            dd begin;1D0h;0A4h
;------Дополнительные поля NT-----------------------------------------------
image_base              dq IMAGE_BASE;0A8
section_alignment       dd align1;10h;0B0h
file_alignment          dd ntHeader;align1;10h;0B4h
OS_version_major_minor  dw 6,0;0B8h
image_version_major_minor dd 0;0BCh
subsystem_version_major_minor dw 6,0;0C0h
Win32_version           dd 0;0C4h
size_of_image           dd end_import;0C8h
size_of_header          dd begin;1D0h;0CCh
checksum                dd 0;0D0h
subsystem               dw IMAGE_SUBSYSTEM_WINDOWS_GUI;0D4h
DLL_flag                dw 8100h;0D6h;8000h;IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
Stack_allocation        dq 0x100000;0D8h
Stack_commit            dq 0x1000;0E0h
Heap_allocation         dq 0x100000;0E8h
Heap_commit             dq 0x1000;0F0h
loader_flag             dd 0;0F8h
number_of_dirs          dd 2;0FCh
export_RVA_size         dq 0;100h
import_RVA_size         dd _import,0x3C;end_import-import
;------------------------------------------------
section_table           dq ".text";180h
.virtual_size           dd  a0-begin;51h;188h;0x57
.virtual_address        dd begin;1D0h;18Ch
.Physical_size          dd Import_Table-begin;60h;190h
.Physical_offset        dd begin;1D0h;194h
.Relocations_and_Linenumbers dq 0;198h
.Relocations_and_Linenumbers_count dd 0;1A0h
.Attributes             dd 80000020h;1A4;IMAGE_SCN_MEM_WRITE or IMAGE_SCN_CNT_CODE;0x80000020
;--------данные и код-----------------------------------------
begin:          ;1D0h
MsgBoxText      dbs "Win64 Assembly is Great!",0;1D0h
MsgCaption      db "Uncle Remus tales: #1 MessageBox",0;1E9h
start:          ;20Ah
        push rbp                     ;55h
        mov edx,MsgBoxText+IMAGE_BASE;BAD0014000
        lea r8d,[rdx+MsgBoxText.size];448D4219
        xor ecx,ecx                  ;33C9
        xor r9d,r9d                  ;4533C9
        call [MessageBox]            ;FF1511000000
        pop rbp                      ;5D
        retn                         ;C3
a0:
;---------секция импорта---------------------------------------
Import_Table:
user32_table:
MessageBox  dq _MessageBox
_import:
dd 0,0,0,user32_dll,user32_table,0
user32_dll db "user32"
dd 0
_MessageBox             db 0,0,"MessageBoxA"

end_import:    
The size of exe-file is 332 bytes


Description:
Download
Filename: 01.zip
Filesize: 2.22 KB
Downloaded: 61 Time(s)

Post 01 May 2018, 23:36
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