* Thomas Garnier <[email protected]> wrote:
> Changes:
> - v2:
> - Add support for global stack cookie while compiler default to fs without
> mcmodel=kernel
> - Change patch 7 to correctly jump out of the identity mapping on kexec
> load
> preserve.
>
> These patches make the changes necessary to build the kernel as Position
> Independent Executable (PIE) on x86_64. A PIE kernel can be relocated below
> the top 2G of the virtual address space. It allows to optionally extend the
> KASLR randomization range from 1G to 3G.
So this:
61 files changed, 923 insertions(+), 299 deletions(-)
... is IMHO an _awful_ lot of churn and extra complexity in pretty fragile
pieces
of code, to gain what appears to be only ~1.5 more bits of randomization!
Do these changes get us closer to being able to build the kernel as truly
position
independent, i.e. to place it anywhere in the valid x86-64 address space? Or
any
other advantages?
Thanks,
Ingo
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