Re: [PATCH] x86: kaslr: move ELF relocation handling to C

[Kees Cook]

On Mon, Apr 22, 2013 at 1:04 AM, Ingo Molnar <mingo@xxxxxxxxxx> wrote:
>
> * Kees Cook <keescook@xxxxxxxxxxxx> wrote:
>
>> On Sun, Apr 21, 2013 at 2:13 AM, Ingo Molnar <mingo@xxxxxxxxxx> wrote:
>> >
>> > * Kees Cook <keescook@xxxxxxxxxxxx> wrote:
>> >
>> >> Moves the relocation handling into C, after decompression. Only
>> >> kernels that need relocation support will use the code. The new
>> >> CONFIG_RANDOMIZE_BASE does not yet do anything except turn on this logic
>> >> for 64-bit kernels.
>> >
>> > So why not keep the inactive CONFIG_RANDOMIZE_BASE hunks in a separate
>> > patch, and just have this one clean, orthogonal patch that moves
>> > relocation handling into C?
>>
>> I had wanted there to be a way to test building with 64-bit
>> relocations. With this patch and CONFIG_RANDOMIZE_BASE=y, I could do
>> that. Would you rather I remove those pieces?
>
> But AFAICS CONFIG_RANDOMIZE_BASE is not an interactive config option, so
> how did you turn it on?

I directly edited the .config file to enable it.

> But no strong objections in any case.

HPA, any opinion? How would you like to see arranged for tip/kaslr?

-Kees

--
Kees Cook
Chrome OS Security
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