Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1286929

Re: [RFC][PATCH] ppc: Implement save_stack_trace_regs()

Show all headers | View raw

On Tue, 2015-12-08 at 13:50 -0500, Steven Rostedt wrote:

> It has come to my attention that kprobe event stack tracing does not
> work on powerpc.

Yep looks like you're right. I didn't realise it was separate from the regular
stack trace stuff.

> diff --git a/arch/powerpc/kernel/stacktrace.c b/arch/powerpc/kernel/stacktrace.c
> index ea43a347a104..0142c86801ba 100644
> --- a/arch/powerpc/kernel/stacktrace.c
> +++ b/arch/powerpc/kernel/stacktrace.c
> @@ -61,3 +61,10 @@ void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
>  	save_context_stack(trace, tsk->thread.ksp, tsk, 0);
>  }
>  EXPORT_SYMBOL_GPL(save_stack_trace_tsk);
> +
> +void
> +save_stack_trace_regs(struct pt_regs *regs, struct stack_trace *trace)
> +{
> +	save_context_stack(trace, regs->gpr[PT_R1], current, 0);

In the kernel we would normally use just '1' here rather than 'PT_R1', but it's
not a huge deal.

Should I take this via powerpc or do you want it to go in via tracing?

cheers

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[RFC][PATCH] ppc: Implement save_stack_trace_regs() Steven Rostedt <rostedt@goodmis.org> - 2015-12-08 20:00 +0100
  Re: [RFC][PATCH] ppc: Implement save_stack_trace_regs() Michael Ellerman <mpe@ellerman.id.au> - 2015-12-09 01:30 +0100
    Re: [RFC][PATCH] ppc: Implement save_stack_trace_regs() Steven Rostedt <rostedt@goodmis.org> - 2015-12-09 01:30 +0100
      Re: [RFC][PATCH] ppc: Implement save_stack_trace_regs() Michael Ellerman <mpe@ellerman.id.au> - 2015-12-09 02:10 +0100
        Re: [RFC][PATCH] ppc: Implement save_stack_trace_regs() Steven Rostedt <rostedt@goodmis.org> - 2015-12-09 02:30 +0100

csiph-web