I try to ouput the string length of hello in cmd screen using the following masm code.
I create a function called strlo
to compute string length.
.486
.Model flat,Stdcall
option casemap :none ; case sensitive
include \masm32\include\windows.inc
include \masm32\include\kernel32.inc
includelib \masm32\lib\kernel32.lib
include \masm32\include\masm32.inc
includelib \masm32\lib\masm32.lib
strlo PROTO :DWORD
.data
msg db "Hello",0
.data?
pr dd ?
.code
start:
invoke strlo,addr msg
strlo proc parm:DWORD
xor eax,eax
mov edi,parm
l1:
cmp byte ptr [edi] ,0
je l2
inc edi
inc eax
jmp l1
l2:
ret
strlo endp
invoke StdOut,eax
invoke ExitProcess,0
end start
When I run it, I get no output.
F:\masm32>len.exe
F:\masm32>