[PATCH 4/8] unwind: Implement generic sframe unwinder library

[Weinan Liu]

On Thu, Jan 30, 2025 at 2:29 AM Prasanna Kumar T S M <ptsm at linux.microsoft.com> wrote:
> On 30-01-2025 15:52, Prasanna Kumar T S M wrote:
> >
> > On 28-01-2025 03:03, Weinan Liu wrote:
> > > This change introduces a kernel space unwinder using sframe table for
> > > architectures without ORC unwinder support.
> > >
> > > The implementation is adapted from Josh's userspace sframe unwinder
> > > proposal[1] according to the sframe v2 spec[2].
> > >
> > > [1]
> > > https://lore.kernel.org/lkml/42c0a99236af65c09c8182e260af7bcf5aa1e158.1730150953.git.jpoimboe@kernel.org/
> > > [2] https://sourceware.org/binutils/docs/sframe-spec.html
> > >
> > > Signed-off-by: Weinan Liu <wnliu at google.com>
> > > ---
> > >   include/linux/sframe_lookup.h |  43 ++++++++
> > >   kernel/Makefile               |   1 +
> > >   kernel/sframe_lookup.c        | 196 ++++++++++++++++++++++++++++++++++
> Nit: Can this file be placed inside lib/ instead of kernel/ folder?
This could be integrated with Josh's proposal in the future.
https://lore.kernel.org/lkml/cover.1737511963.git.jpoimboe@kernel.org/

Either lib/ or kernel/unwind/ are ok to me.