I wrote a kernel module for a character device however, when I try to compile it I get an assembler error, could this be a problem of the code or is it internal?
Any help would be highly appreciated.Code:beg_g@pop:~ > make gcc -Wall -DMODULE -D__KERNEL__ -DLINUX -c char.c -I/lib/modules/`uname -r`/build/include /tmp/ccaELEEv.s: Assembler messages: /tmp/ccaELEEv.s:219: Error: `%al' not allowed with `movl' make: *** [char.o] Error 1
Gerald
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Gerald.
I think you want to use movw.
No, movb.
movl expects a 32 bit register (%eax for example)
movw expects a 16 bit register (%ax)
movb expects a 8 bit register (%al, %ah)
easy, isn't it?
(it is if you remember that b -> byte, w -> word, l -> longword)
alex
Yea, I use nasm if I do any assembly so I don't have that problem.
But gcc doesn't accept nasm-like-syntax in inline assembly...
