Re: [PATCH v3 35/75] x86/head/64: Build k/head64.c with -fno-stack-protector
From: Joerg Roedel
Date: Wed Jun 03 2020 - 11:19:01 EST
On Tue, May 19, 2020 at 09:58:18AM -0400, Brian Gerst wrote:
> On Tue, Apr 28, 2020 at 11:28 AM Joerg Roedel <joro@xxxxxxxxxx> wrote:
> The proper fix would be to initialize MSR_GS_BASE earlier.
That'll mean to initialize it two times during boot, as the first C
function with stack-protection is called before the kernel switches to
its high addresses (early_idt_setup call-path). But okay, I can do that.
On the other side, which value does the stack protector have in the early
boot code?
Joerg