On Mon 2017-09-25 09:33:42, Ingo Molnar wrote:
>
> * Pavel Machek wrote:
>
> > > For example, there would be collision with regular user-space mappings,
> > > right?
> > > Can local unprivileged users use mmap(MAP_FIXED) probing to figure out
Hi!
> > We do need to consider how we want modules to fit into whatever model we
> > choose, though. They can be adjacent, or we could go with a more
> > traditional dynamic link model where the modules can be separate, and
> > chained together with the main kernel via the GOT.
>
> So I believe
Hi!
> > + The kernel and modules will generate slightly more assembly (1 to
> > 2%
> > + increase on the .text sections). The vmlinux binary will be
> > + significantly smaller due to less relocations.
> >
> > ... but describing a 1-2% kernel text size increase as "slightl
2G memory limit.
>
> Signed-off-by: Thomas Garnier
Acked-by: Pavel Machek
> --- a/arch/x86/power/hibernate_asm_64.S
> +++ b/arch/x86/power/hibernate_asm_64.S
> @@ -24,7 +24,7 @@
> #include
>
> ENTRY(swsusp_arch_suspend)
> - movq$saved_context, %rax
> + l
2G memory limit.
>
> Signed-off-by: Thomas Garnier
Acked-by: Pavel Machek
(But not tested; testing it would be nice).
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures)
http://atrey.karlin.mff.c
On Wed 2017-03-22 13:06:54, Jiri Slaby wrote:
> Hi,
>
> On 03/21/2017, 03:08 PM, Pavel Machek wrote:
> >> -ENTRY(saved_rbp) .quad 0
> >> -ENTRY(saved_rsi) .quad 0
> >> -ENTRY(saved_rdi) .quad 0
> >> -ENTRY(saved_rbx) .quad 0
>
Hi!
> -ENTRY(saved_rbp) .quad 0
> -ENTRY(saved_rsi) .quad 0
> -ENTRY(saved_rdi) .quad 0
> -ENTRY(saved_rbx) .quad 0
> +SYM_DATA_START(saved_rbp).quad 0
> +SYM_DATA_START(saved_rsi).quad 0
> +SYM_DATA_START(saved_rdi).quad 0
> +SYM_D
On Tue 2017-03-14 10:05:08, Thomas Garnier wrote:
> This patch makes the GDT remapped pages read-only to prevent corruption.
> This change is done only on 64-bit.
>
> The native_load_tr_desc function was adapted to correctly handle a
> read-only GDT. The LTR instruction always writes to the GDT TS
