Clear current_kprobe and enable preemption in kprobe
even if pre_handler returns !0.
This simplifies function override using kprobes.
Jprobe used to require to keep the preemption disabled and
keep current_kprobe until it returned to original function
entry. For this reason kprobe_int3_handler()
Don't call the ->break_handler() from the ARC kprobes code,
because it was only used by jprobes which got removed.
Signed-off-by: Masami Hiramatsu
Cc: Vineet Gupta
Cc: linux-snps-arc@lists.infradead.org
---
arch/arc/kernel/kprobes.c |7 ---
1 file changed, 7 deletions(-)
diff --git a/a
Remove arch dependent setjump/longjump functions
and unused fields in kprobe_ctlblk for jprobes
from arch/arc.
Signed-off-by: Masami Hiramatsu
Cc: Vineet Gupta
Cc: linux-snps-arc@lists.infradead.org
---
arch/arc/include/asm/kprobes.h |2 --
arch/arc/kernel/kprobes.c | 38 ++--
From: Peter Zijlstra
arc_usr_cmpxchg syscall is supposed to be used on platforms
that lack support of Load-Locked/Store-Conditional instructions
in hardware. And in that case we mimic missing hardware features
with help of kernel's sycall that "atomically" checks current
value in memory and then
On Mon, Mar 19, 2018 at 02:00:02PM +0300, Alexey Brodkin wrote:
> diff --git a/arch/arc/kernel/process.c b/arch/arc/kernel/process.c
> index 5ac3b547453f..d7d3e16133d6 100644
> --- a/arch/arc/kernel/process.c
> +++ b/arch/arc/kernel/process.c
> @@ -47,7 +47,9 @@ SYSCALL_DEFINE0(arc_gettls)
> SYSCA
Hi Vineet,
On Wed, 2018-04-18 at 11:16 -0700, Vineet Gupta wrote:
> On 03/21/2018 04:54 AM, Alexey Brodkin wrote:
> > /*
> > > > * This is only for old cores lacking LLOCK/SCOND, which by
> > > > defintion
> > > > @@ -60,23 +62,48 @@ SYSCALL_DEFINE3(arc_usr_cmpxchg, int *, uaddr, int,
>
