mirror of
https://github.com/netwide-assembler/nasm.git
synced 2024-12-09 08:51:18 +08:00
39 lines
598 B
NASM
39 lines
598 B
NASM
%macro DosPrintMsg 1+
|
|
%ifnid %1
|
|
section .data
|
|
|
|
%%str_to_print:db %1
|
|
|
|
section .text
|
|
|
|
mov dx,%%str_to_print
|
|
mov ah,9
|
|
int 0x21
|
|
%else
|
|
mov dx,(%1)
|
|
mov ah,9
|
|
int 0x21
|
|
%endif
|
|
%endmacro
|
|
|
|
%macro DosExit 1
|
|
%if (%1) == 0
|
|
;use short-form return 0 exit
|
|
int 0x20
|
|
%elif ((%1) < 256) && ((%1) > 0)
|
|
mov ax,0x4C00 | (%1)
|
|
int 0x21
|
|
%else
|
|
%error Invalid return value
|
|
%endif
|
|
%endmacro
|
|
|
|
section .text
|
|
DosPrintMsg predefined_str
|
|
DosPrintMsg "Using string with macro-defined label",10,0
|
|
DosExit 0
|
|
DosExit 1
|
|
|
|
section .data
|
|
predefined_str:db "Using string with predefined label",10,0
|