error .local_label

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macomics

Joined: 26 Jan 2021
Posts: 1151
Location: Russia

macomics 27 Apr 2025, 10:33

FoXx wrote:

macomics, is it possible to declare a label twice?

In my example, there is no double declaration of labels.

It is based on the features of the preprocessor and assembler. The preprocessor is responsible for generating label names and all label directives are visible to it, but the assembler will simply skip the label directive because it is inside if 0 .. end if

That is, when the assembler needs to calculate the address for this name, it will be uniquely determined once. But the preprocessor will take note and concatenate the names with a string that occurs more than once in the text.

27 Apr 2025, 10:33

FoXx

Joined: 25 Feb 2025
Posts: 18

FoXx 27 Apr 2025, 12:28

revolution, if I declare a label with two dots (..global), it will be visible from everywhere. And it will not change the following main label. Am I right?

macomics, I'm not very good at the intricacies of macros. Simple solutions work better for me.

27 Apr 2025, 12:28

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20632
Location: In your JS exploiting you and your system

revolution 27 Apr 2025, 12:45

All labels are visible everywhere. fasm doesn't have the concept of global labels as a separate type, all labels are global.

The double-dot just means that the base label is not changed.

The single-dot just means to append the name to the current base label.

Code:

a:   ; base label is now a
b:   ; base label is now b
..c: ; base label is still b
.d:  ; label name is "b.d", base label is still b

27 Apr 2025, 12:45

FoXx

Joined: 25 Feb 2025
Posts: 18

FoXx 28 Apr 2025, 07:44

I used the label syntax:

Code:

label@MyFunction: ; always global label

Code:

proc Func_A
        ...
label@Func_A:
        ...
        jmp Func_end
endp
;-------------------
proc Func_B
        ...
label@Func_B:
        ...
        jmp Func_end
endp
;-------------------
proc Func_C
        ...
label@Func_C:
        ...
        jmp Func_end
endp
;-------------------
proc Func_D
        ...
label@Func_D:
        ...
        jmp Func_end
endp
;-------------------
proc Func_end
        ...
        ret
endp

Now I'm tidying up the code.

revolution and macomics thanks for helping me understand.

28 Apr 2025, 07:44

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