[SOLVED] What's the proper way to define macro in YASM?

[Roman]

That's my macro for halting the CPU:

Code: Select all

%macro cpu_halt 0
        cli
        hlt
%endmacro

And when I call it nothing happens:

Code: Select all

cpu_halt

Code compiles without any warning, but CPU doesn't halt.

[iansjack]

So, what does the assembled code look like?

[Roman]

So, what does the assembled code look like?

I added this to check.

Code: Select all

        mov ax, [blah]
        cli
        hlt

...
...
...

blah:
        cpu_halt

AX == 4dbe

It's strange, because CLI & HLT should be 0xFA & 0xF4.

[Combuster]

-Worphan-labels: Warn on labels lacking a trailing option
When using the NASM-compatible parser, causes Yasm to warn about labels found alone on a line without a trailing colon. While these are legal labels in NASM syntax, they may be unintentional, due to
typos or macro definition ordering.

[alexfru]

"mov ax, [blah]" might probably need to be changed to something like "mov ax, cs:[blah]". At any rate, YASM should be able to generate a listing file, in which you should find the actual instructions from the expanded macros and/or instruction opcodes. Besides, there are disassemblers out there! I don't know if YASM comes with one, but NASM does.

[Roman]

Moved the macro to the top of the code, now works.