On Fri, Mar 6, 2015 at 11:56 AM, Kees Cook <[email protected]> wrote:
> On Fri, Mar 6, 2015 at 11:28 AM, Yinghai Lu <[email protected]> wrote:
> Okay, I've proven this to myself now. :) I think it would be valuable
> to call out that brk and bss are included in the _end calculation. For
> others:
...
> So, _end - _text does equal _text + bss offset + bss size + brk size
>
> Thanks! It'll be nice to lose the run_size hack. Adding some
> documentation to the code here would help others in the future trying
> to find this value, I think. :)
in arch/x86/kernel/vmlinux.lds.S, we have
/* BSS */
. = ALIGN(PAGE_SIZE);
.bss : AT(ADDR(.bss) - LOAD_OFFSET) {
__bss_start = .;
*(.bss..page_aligned)
*(.bss)
. = ALIGN(PAGE_SIZE);
__bss_stop = .;
}
. = ALIGN(PAGE_SIZE);
.brk : AT(ADDR(.brk) - LOAD_OFFSET) {
__brk_base = .;
. += 64 * 1024; /* 64k alignment slop space */
*(.brk_reservation) /* areas brk users have reserved */
__brk_limit = .;
}
_end = .;
so _end already cover bss and brk.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
