test/multisection.asm

   1 ; To test where code that is placed before any explicit SECTION
   2 ; gets placed, and what happens if a .text section has an ORG
   3 ;statement, uncomment the following lines.
   4 ;
   5 ;       times   10h     nop
   6 ;
   7 ;section .text
   8 ;org 0x300
   9 ;       times   20h     inc ax
  10
  11 ; let's see which of these sections can be placed in the specified order.
  12
  13 section .appspecific
  14 section .data
  15 section .stringdata
  16 section .mytext
  17 section .code
  18 section .extra_code
  19
  20
  21 section .stringdata
  22 mystr1: db "Hello, this is string 1", 13, 10, '$'
  23
  24 section .extra_code
  25 org 0x200
  26 bits 16
  27 more:
  28    mov si, asciz1
  29    mov ah, 0x0E
  30    xor bx, bx
  31 .print:
  32    lodsb
  33    test al, al
  34    jz .end
  35    int  0x10
  36    jmp short .print
  37 .end:
  38
  39    xor ax, ax
  40    int 0x16
  41
  42    mov ax, 0x4c00
  43    int 0x21
  44
  45 section .appspecific
  46 asciz1: db "This is string 2", 0
  47
  48 section .code
  49 org 0x100
  50 bits 16
  51
  52 start:
  53    mov dx, mystr1
  54    mov ah, 9
  55    int 0x21
  56
  57    xor ax, ax
  58    int 0x16
  59
  60    jmp more
  61
  62 section .text
  63         xor     eax,eax
  64         times   50h nop
  65
  66 section .mytext
  67
  68         xor     ebx,ebx
  69
  70 section .data
  71         db      95h,95h,95h,95h,95h,95h,95h,95h
  72
  73 section .hmm
  74         resd    2
  75
  76 section .bss
  77         resd    8
  78
  79 section .final1
  80         inc     ax
  81
  82 section .final2
  83         inc     bx
  84
  85 section .final3
  86         inc     cx