mirror of
https://github.com/netwide-assembler/nasm.git
synced 2024-11-27 08:10:07 +08:00
97 lines
2.6 KiB
NASM
97 lines
2.6 KiB
NASM
; test source file for assembling to NetBSD/FreeBSD a.out shared library
|
|
; build with:
|
|
; nasm -f aoutb aoutso.asm
|
|
; ld -Bshareable -o aoutso.so aoutso.o
|
|
; test with:
|
|
; cc -o aoutso aouttest.c aoutso.so
|
|
; ./aoutso
|
|
|
|
; This file should test the following:
|
|
; [1] Define and export a global text-section symbol
|
|
; [2] Define and export a global data-section symbol
|
|
; [3] Define and export a global BSS-section symbol
|
|
; [4] Define a non-global text-section symbol
|
|
; [5] Define a non-global data-section symbol
|
|
; [6] Define a non-global BSS-section symbol
|
|
; [7] Define a COMMON symbol
|
|
; [8] Define a NASM local label
|
|
; [9] Reference a NASM local label
|
|
; [10] Import an external symbol
|
|
; [11] Make a PC-relative call to an external symbol
|
|
; [12] Reference a text-section symbol in the text section
|
|
; [13] Reference a data-section symbol in the text section
|
|
; [14] Reference a BSS-section symbol in the text section
|
|
; [15] Reference a text-section symbol in the data section
|
|
; [16] Reference a data-section symbol in the data section
|
|
; [17] Reference a BSS-section symbol in the data section
|
|
|
|
BITS 32
|
|
EXTERN __GLOBAL_OFFSET_TABLE_
|
|
GLOBAL _lrotate:function ; [1]
|
|
GLOBAL _greet:function ; [1]
|
|
GLOBAL _asmstr:data _asmstr.end-_asmstr ; [2]
|
|
GLOBAL _textptr:data 4 ; [2]
|
|
GLOBAL _selfptr:data 4 ; [2]
|
|
GLOBAL _integer:data 4 ; [3]
|
|
EXTERN _printf ; [10]
|
|
COMMON _commvar 4 ; [7]
|
|
|
|
SECTION .text
|
|
|
|
; prototype: long lrotate(long x, int num);
|
|
_lrotate: ; [1]
|
|
push ebp
|
|
mov ebp,esp
|
|
mov eax,[ebp+8]
|
|
mov ecx,[ebp+12]
|
|
.label rol eax,1 ; [4] [8]
|
|
loop .label ; [9] [12]
|
|
mov esp,ebp
|
|
pop ebp
|
|
ret
|
|
|
|
; prototype: void greet(void);
|
|
_greet push ebx ; we'll use EBX for GOT, so save it
|
|
call .getgot
|
|
.getgot: pop ebx
|
|
add ebx,__GLOBAL_OFFSET_TABLE_ + $$ - .getgot wrt ..gotpc
|
|
mov eax,[ebx+_integer wrt ..got] ; [14]
|
|
mov eax,[eax]
|
|
inc eax
|
|
mov [ebx+localint wrt ..gotoff],eax ; [14]
|
|
mov eax,[ebx+_commvar wrt ..got]
|
|
push dword [eax]
|
|
mov eax,[ebx+localptr wrt ..gotoff] ; [13]
|
|
push dword [eax]
|
|
mov eax,[ebx+_integer wrt ..got] ; [1] [14]
|
|
push dword [eax]
|
|
lea eax,[ebx+_printfstr wrt ..gotoff]
|
|
push eax ; [13]
|
|
call _printf wrt ..plt ; [11]
|
|
add esp,16
|
|
pop ebx
|
|
ret
|
|
|
|
SECTION .data
|
|
|
|
; a string
|
|
_asmstr db 'hello, world', 0 ; [2]
|
|
.end
|
|
|
|
; a string for Printf
|
|
_printfstr db "integer==%d, localint==%d, commvar=%d"
|
|
db 10, 0
|
|
|
|
; some pointers
|
|
localptr dd localint ; [5] [17]
|
|
_textptr dd _greet wrt ..sym ; [15]
|
|
_selfptr dd _selfptr wrt ..sym ; [16]
|
|
|
|
SECTION .bss
|
|
|
|
; an integer
|
|
_integer resd 1 ; [3]
|
|
|
|
; a local integer
|
|
localint resd 1 ; [6]
|