tree 99872945803a76d1ff9e438cf48864cd0a5d9bf4
parent 499a4f3ec057a0f79636cc3c1e581bb6e977a30f
author Sebastian Andrzej Siewior <bigeasy@linutronix.de> 1344355948 +0200
committer Oleg Nesterov <oleg@redhat.com> 1347723448 +0200

uprobes: Introduce arch_uprobe_enable/disable_step()

As Oleg pointed out in [0] uprobe should not use the ptrace interface
for enabling/disabling single stepping.

[0] http://lkml.kernel.org/r/20120730141638.GA5306@redhat.com

Add the new "__weak arch" helpers which simply call user_*_single_step()
as a preparation. This is only needed to not break the powerpc port, we
will fold this logic into arch_uprobe_pre/post_xol() hooks later.

We should also change handle_singlestep(), _disable_step(&uprobe->arch)
should be called before put_uprobe().

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>