Re: [PATCH v7 2/4] x86/stackvalidate: Compile-time stack validation

On Tue, Jul 14, 2015 at 10:57:38PM +0200, Peter Zijlstra wrote:
> On Tue, Jul 14, 2015 at 12:14:08PM -0500, Josh Poimboeuf wrote:
> > This adds a CONFIG_STACK_VALIDATION option which enables a host tool
> > named stackvalidate which runs at compile time. It analyzes every .o
> > file and ensures the validity of its stack metadata. It enforces a set
> > of rules on asm code and C inline assembly code so that stack traces can
> > be reliable.
> >
> > Currently it checks frame pointer usage. I plan to add DWARF CFI
> > validation as well.
>
> Validation or Annotation, as in the generation of DWARF CFI info?

My current thinking is I'll do both:

- CFI generation for asm code
- CFI validation of C code (and possibly asm code too)

It's TBD whether the generation will be done by this tool or by a
separate tool.

--
Josh
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