test/cofftest.asm

   1 ;Cannot be automatically tested because it differs every time,
   2 ;I guess because of a date/time field.
   3
   4 ; test source file for assembling to COFF
   5 ; build with (under DJGPP, for example):
   6 ;    nasm -f coff cofftest.asm
   7 ;    gcc -o cofftest cofftest.c cofftest.o
   8
   9 ; This file should test the following:
  10 ; [1] Define and export a global text-section symbol
  11 ; [2] Define and export a global data-section symbol
  12 ; [3] Define and export a global BSS-section symbol
  13 ; [4] Define a non-global text-section symbol
  14 ; [5] Define a non-global data-section symbol
  15 ; [6] Define a non-global BSS-section symbol
  16 ; [7] Define a COMMON symbol
  17 ; [8] Define a NASM local label
  18 ; [9] Reference a NASM local label
  19 ; [10] Import an external symbol
  20 ; [11] Make a PC-relative call to an external symbol
  21 ; [12] Reference a text-section symbol in the text section
  22 ; [13] Reference a data-section symbol in the text section
  23 ; [14] Reference a BSS-section symbol in the text section
  24 ; [15] Reference a text-section symbol in the data section
  25 ; [16] Reference a data-section symbol in the data section
  26 ; [17] Reference a BSS-section symbol in the data section
  27
  28           BITS 32
  29           GLOBAL _lrotate       ; [1]
  30           GLOBAL _greet         ; [1]
  31           GLOBAL _asmstr        ; [2]
  32           GLOBAL _textptr       ; [2]
  33           GLOBAL _selfptr       ; [2]
  34           GLOBAL _integer       ; [3]
  35           EXTERN _printf        ; [10]
  36           COMMON _commvar 4     ; [7]
  37
  38           SECTION .text
  39
  40 ; prototype: long lrotate(long x, int num);
  41 _lrotate:                       ; [1]
  42           push ebp
  43           mov ebp,esp
  44           mov eax,[ebp+8]
  45           mov ecx,[ebp+12]
  46 .label    rol eax,1             ; [4] [8]
  47           loop .label           ; [9] [12]
  48           mov esp,ebp
  49           pop ebp
  50           ret
  51
  52 ; prototype: void greet(void);
  53 _greet    mov eax,[_integer]    ; [14]
  54           inc eax
  55           mov [localint],eax    ; [14]
  56           push dword [_commvar]
  57           mov eax,[localptr]    ; [13]
  58           push dword [eax]
  59           push dword [_integer] ; [1] [14]
  60           push dword _printfstr ; [13]
  61           call _printf          ; [11]
  62           add esp,16
  63           ret
  64
  65           SECTION .data
  66
  67 ; a string
  68 _asmstr   db 'hello, world', 0  ; [2]
  69
  70 ; a string for Printf
  71 _printfstr db "integer==%d, localint==%d, commvar=%d"
  72           db 10, 0
  73
  74 ; some pointers
  75 localptr  dd localint           ; [5] [17]
  76 _textptr  dd _greet             ; [15]
  77 _selfptr  dd _selfptr           ; [16]
  78
  79           SECTION .bss
  80
  81 ; an integer
  82 _integer  resd 1                ; [3]
  83
  84 ; a local integer
  85 localint  resd 1                ; [6]