test/aouttest.asm

   1 ;Testname=unoptimized; Arguments=-O0 -faout -oaouttest.o; Files=.stdout .stderr aouttest.o
   2 ;Testname=optimized;   Arguments=-Ox -faout -oaouttest.o; Files=.stdout .stderr aouttest.o
   3
   4 ; test source file for assembling to a.out
   5 ; build with:
   6 ;    nasm -f aout aouttest.asm
   7 ;    gcc -o aouttest aouttest.c aouttest.o
   8 ; (assuming your gcc is a.out)
   9
  10 ; This file should test the following:
  11 ; [1] Define and export a global text-section symbol
  12 ; [2] Define and export a global data-section symbol
  13 ; [3] Define and export a global BSS-section symbol
  14 ; [4] Define a non-global text-section symbol
  15 ; [5] Define a non-global data-section symbol
  16 ; [6] Define a non-global BSS-section symbol
  17 ; [7] Define a COMMON symbol
  18 ; [8] Define a NASM local label
  19 ; [9] Reference a NASM local label
  20 ; [10] Import an external symbol
  21 ; [11] Make a PC-relative call to an external symbol
  22 ; [12] Reference a text-section symbol in the text section
  23 ; [13] Reference a data-section symbol in the text section
  24 ; [14] Reference a BSS-section symbol in the text section
  25 ; [15] Reference a text-section symbol in the data section
  26 ; [16] Reference a data-section symbol in the data section
  27 ; [17] Reference a BSS-section symbol in the data section
  28
  29           BITS 32
  30           GLOBAL _lrotate       ; [1]
  31           GLOBAL _greet         ; [1]
  32           GLOBAL _asmstr        ; [2]
  33           GLOBAL _textptr       ; [2]
  34           GLOBAL _selfptr       ; [2]
  35           GLOBAL _integer       ; [3]
  36           EXTERN _printf        ; [10]
  37           COMMON _commvar 4     ; [7]
  38
  39           SECTION .text
  40
  41 ; prototype: long lrotate(long x, int num);
  42 _lrotate:                       ; [1]
  43           push ebp
  44           mov ebp,esp
  45           mov eax,[ebp+8]
  46           mov ecx,[ebp+12]
  47 .label    rol eax,1             ; [4] [8]
  48           loop .label           ; [9] [12]
  49           mov esp,ebp
  50           pop ebp
  51           ret
  52
  53 ; prototype: void greet(void);
  54 _greet    mov eax,[_integer]    ; [14]
  55           inc eax
  56           mov [localint],eax    ; [14]
  57           push dword [_commvar]
  58           mov eax,[localptr]    ; [13]
  59           push dword [eax]
  60           push dword [_integer] ; [1] [14]
  61           push dword _printfstr ; [13]
  62           call _printf          ; [11]
  63           add esp,16
  64           ret
  65
  66           SECTION .data
  67
  68 ; a string
  69 _asmstr   db 'hello, world', 0  ; [2]
  70
  71 ; a string for Printf
  72 _printfstr db "integer==%d, localint==%d, commvar=%d"
  73           db 10, 0
  74
  75 ; some pointers
  76 localptr  dd localint           ; [5] [17]
  77 _textptr  dd _greet             ; [15]
  78 _selfptr  dd _selfptr           ; [16]
  79
  80           SECTION .bss
  81
  82 ; an integer
  83 _integer  resd 1                ; [3]
  84
  85 ; a local integer
  86 localint  resd 1                ; [6]