let's say I have these 2 procedures:
dummy_proc_1 proc
pusha
call function_from_dummy_proc2
popa
ret
dummy_proc_1 endp
dummy_proc_2 proc
pusha
function_from_dummy_proc2:
xor eax,eax
ret
popa
dummy_proc_2 endp
ok,the problem is that MASM says that function_from_dummy_proc2 is undefined symbol?I even switched the places of the procedures.
wtf,old TASM 5.0 compiles this code flawlessly...the problem is that it aint free.
i'm not sure if i understand this well, but you want to execute the commands under "function_from_dummy_proc2:" by calling it from dummy_proc_1? i don't think that this is possible. you'll have to define "function_form_dummy_proc2" as a procedure as you did with "dummy_proc_1" and "dummy_proc_2" or (but i'm not sure) you can jump to "function_from_dummy_proc2" like this:
jmp function_from_dummy_proc2
afaik all labels in masm are local - you can achieve the same effect in tasm by using '@@' as a prefix for label names. as i'm not using masm i don't know if it's possible to access these labels from other procs.
Define your label with a double colon to make it visible outside the procedure, like this :
function_label::
Shaolinwu,
let's say I have these 2 procedures:
dummy_proc_1 proc ;
pusha ; This is OK
call function_from_dummy_proc2 ;
popa ;
ret ;
dummy_proc_1 endp ;
dummy_proc_2 proc ;
pusha ; Demage stack as only PUSH and never POP
function_from_dummy_proc2: ;
xor eax,eax ;
ret ;
popa ; Useless - never executed
dummy_proc_2 endp ;
This way it will be OK :
dummy_proc_1 proc ;
pusha ; This is OK
call function_from_dummy_proc2 ;
popa ;
ret ;
dummy_proc_1 endp ;
function_from_dummy_proc2: ;
xor eax,eax ;
retn ; Have to be a near return
thanks karim,that fixed the problem;)
forge,those were just some dummy procs i quickly wrote up,all instructions were dummy,no need to comment them:)