On Wed, Sep 21, 2016 at 04:03:58PM -0500, Josh Poimboeuf wrote:
> - keep 'restore_all' label in "x86/entry/head/32: use local labels"
> Thanks to all the recent x86 entry code refactoring, most tasks' kernel
> stacks start at the same offset right below their saved pt_regs,
> regardless of which syscall was used to enter the kernel. That creates
> a nice convention which makes it straightforward to identify the end of
> the stack, which can be useful [*] for the unwinder.
> But there a few places where tasks don't yet follow the convention.
> This patch set finishes the job.
> [*] This will be useful for three upcoming proposed features:
> - Detecting corrupt stacks in the unwinder (which will also be a force
> for ensuring this end of stack convention continues to be followed in
> the future).
> - Printing all saved pt_regs on the stack during an oops/warning.
> - Validating stacks in the livepatch consistency model.