[PATCH v4 1/5] gcc-plugins: arm-ssp: Prepare for THREAD_INFO_IN_TASK support

[Kees Cook]

On Mon, Sep 13, 2021 at 12:39:57PM +0200, Ard Biesheuvel wrote:
> We will be enabling THREAD_INFO_IN_TASK support for ARM, which means
> that we can no longer load the stack canary value by masking the stack
> pointer and taking the copy that lives in thread_info. Instead, we will
> be able to load it from the task_struct directly, by using the TPIDRURO
> register which will hold the current task pointer when
> THREAD_INFO_IN_TASK is in effect. This is much more straight-forward,
> and allows us to declutter this code a bit while at it.
> 
> Signed-off-by: Ard Biesheuvel <ardb at kernel.org>

Reviewed-by: Kees Cook <keescook at chromium.org>

-- 
Kees Cook