powerpc: Add show_user_instructions()
authorMurilo Opsfelder Araujo <muriloo@linux.ibm.com>
Wed, 1 Aug 2018 21:33:19 +0000 (18:33 -0300)
committerMichael Ellerman <mpe@ellerman.id.au>
Tue, 7 Aug 2018 14:32:30 +0000 (00:32 +1000)
commit88b0fe17573592a8e3196bf143f865da460178e7
treea05812fa22f6c39ee714951eb6882a4193d0ac15
parent0f642d616b8b15647ca34786877b298ff2970713
powerpc: Add show_user_instructions()

show_user_instructions() is a slightly modified version of
show_instructions() that allows userspace instruction dump.

This will be useful within show_signal_msg() to dump userspace
instructions of the faulty location.

Here is a sample of what show_user_instructions() outputs:

  pandafault[10850]: code: 4bfffeec 4bfffee8 3c401002 38427f00 fbe1fff8 f821ffc1 7c3f0b78 3d22fffe
  pandafault[10850]: code: 392988d0 f93f0020 e93f0020 39400048 <9949000039200000 7d234b78 383f0040

The current->comm and current->pid printed can serve as a glue that
links the instructions dump to its originator, allowing messages to be
interleaved in the logs.

Signed-off-by: Murilo Opsfelder Araujo <muriloo@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
arch/powerpc/include/asm/stacktrace.h [new file with mode: 0644]
arch/powerpc/kernel/process.c