Messages in this thread | | | Date | Thu, 26 Sep 2002 18:14:24 +0200 | From | DervishD <> | Subject | Re: A newbie's question |
| |
Hi unknown :)
> rep > movw
In my bootsector.S, it's movsw: repeat move (string) by words. 'movw' is 'mov word size operands'.
> jmpi go,INITSEG
AFAIK, the correct is 'ljmp': long jump. What kernel sources are you seeing?. Old kernels (2.0 and I think that 2.2 too) used as86 to do the assembling, and the syntax was like the Intel one, but with some differences. Not quite standard, I think.
> ///////////////////////////// > 1. What assembly language used in boot.s? Intel Asm or AT&T?
AT&T in new kernels, fully 'assembleable' with GNU as. IMHO is a better syntax, but I don't want to feed a troll here ;)
> 2. Where is the definition of operand movw and jmpi? > I cant find it in the Intel Manual.
Of course, there aren't Intel syntax anyway :) I recommend you to see the 2.4 sources for reading the assembler part. Moreover, the info section for 'GNU as' comments the differences between Intel assembly syntax and the AT&T one. This will be of great help.
In addition to this, I have a document about using GNU as for real mode assembly that comments some of these points. But it is written in spanish only :((
Last, the Assembly-HOWTO will cast some light to the issue, too.
Raúl - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |