Re: [PATCH v2 0/9] x86/entry/head: standardize the end of the stack

From	Josh Poimboeuf <jpoimboe@redhat.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH v2 0/9] x86/entry/head: standardize the end of the stack
Date	2016-10-18 19:20 +0200
Message-ID	<stGdr-4O9-7@gated-at.bofh.it> (permalink)
References	<sjWWd-5EH-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Wed, Sep 21, 2016 at 04:03:58PM -0500, Josh Poimboeuf wrote:
> v2:
> - 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.

Ping?

-- 
Josh

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Re: [PATCH v2 0/9] x86/entry/head: standardize the end of the stack Josh Poimboeuf <jpoimboe@redhat.com> - 2016-10-18 19:20 +0200
  Re: [PATCH v2 0/9] x86/entry/head: standardize the end of the stack Ingo Molnar <mingo@kernel.org> - 2016-10-19 16:20 +0200

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