Re: kernel .text and .rodata

[Matt Thomas <matt%3am-software.com@localhost>]

> On Nov 6, 2014, at 4:20 AM, Masao Uebayashi <uebayasi%gmail.com@localhost> wrote:
> 
> On Thu, Nov 6, 2014 at 4:44 PM, Matt Thomas <matt%3am-software.com@localhost> wrote:
>>> .rodata is set as XN, right?
>> 
>> Since all of memory  is usually direct-mapped these days, the 16MB
>> supersection that holds the kernel text doesn't have XN even though
>> it's RW.
> 
> o all memory is direct-mapped as RW w/ XN (no executable)
> o .text (including .rodata) is mapped as RW w/o XN (executable)
> 
> ?  I hope you meant .text is RO...

What I wrote is not a mistake.

Since data shares the same supersegment as .text, it has to be rw.