[minicoredumper] [PATCH 0/2] Rework get_stack_pointer for linux above 4.8

[John Ogness]

Hello Marco,

I appreciate your hard work on this issue. After much thought I have
decided that we should not begin manually interpretting the core data to
find the stack pointer. There are too many platforms that would need to
be supported (and tested!). This is a Linux user API regression issue
and is being handled as such [0].

Once that change makes it to the appropriate stable branches, this issue
will resolve itself.

John Ogness

[0] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fd7d56270b526ca3ed0c224362e3c64a0f86687a

On 2017-08-02, Marco Felsch <Marco.Felsch at preh.de> wrote:
> The stack pointer isn't reported to the proc-fs since linux kernel 4.9.
> It turned out [0] that we need to parse the kernel coredump ELF-header to
> obtain the stack pointers for each thread. This has the disadvantage of
> architecture depency. Therefore we keep the proc-fs methode for kernel
> below 4.9 and inform the user if he use a kernel > 4.9 and use a
> unsupported architecture.
>
> This patch series is an approach to parse the stack pointer from the
> ELF-header. Currently only the arm64 is supported because of my target arch.
> I've tested it with a linux kernel 4.9 and it works as it should.
>
> [0] http://lists.linutronix.de/pipermail/minicoredumper/2017-July/000044.html
>
> Marco Felsch (2):
>   minicoredumper: add new task_info struct
>   minicoredumper: add new get_stack_pointer function
>
>  configure.ac                      |  14 ++-
>  src/minicoredumper/corestripper.c | 214 +++++++++++++++++++++++++++++++++++++-
>  src/minicoredumper/corestripper.h |   7 ++
>  3 files changed, 232 insertions(+), 3 deletions(-)