Re: CVS commit: src/sys/arch/aarch64

[Ryo Shimizu <ryo%nerv.org@localhost>]

>Maybe we should just pass the protection bits in l2_setblocks, and map the
>kernel text/rodata as RO right away. It would also make it possible to map
>rodata/data as non executable, with PXN|UXN. (Looking at the code it seems
>to me rodata/data are executable currently.)
>
>We would make three calls, to map
>
>	.text as RX
>	.rodata as R
>	.data as RW
>
>a bit like in amd64[1]. Regarding the DDB ifndef, probably there must be
>a bit in ARM64 saying "disable page protection", so it could be set when
>we enter DDB, and we could remove the ifndef.

I get it. I need to write db_write_text(), and when I finish,
set kernel text/rodata READONLY by default.

Ah...I had forgotten deleting execute bit. We need more 2Mbyte alignment
between .text/.rodata. I will fix.

thanks,
-- 
ryo shimizu