From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: "Naveen N. Rao" <naveen.n.rao@linux.vnet.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org,
Masami Hiramatsu <mhiramat@kernel.org>,
Steven Rostedt <rostedt@goodmis.org>
Subject: Re: [v2, 2/4] powerpc/ftrace: Pass the correct stack pointer for DYNAMIC_FTRACE_WITH_REGS
Date: Mon, 19 Jun 2017 22:22:40 +1000 (AEST) [thread overview]
Message-ID: <3wrqqj05Wwz9s8F@ozlabs.org> (raw)
In-Reply-To: <7a91bf93179afb3ada72948e8feb5e5f09fb64c4.1496309487.git.naveen.n.rao@linux.vnet.ibm.com>
On Thu, 2017-06-01 at 10:48:16 UTC, "Naveen N. Rao" wrote:
> For DYNAMIC_FTRACE_WITH_REGS, we should be passing-in the original set
> of registers in pt_regs, to capture the state _before_ ftrace_caller.
> However, we are instead passing the stack pointer *after* allocating a
> stack frame in ftrace_caller. Fix this by saving the proper value of r1
> in pt_regs. Also, use SAVE_10GPRS() to simplify the code.
>
> Fixes: 153086644fd1f ("powerpc/ftrace: Add support for -mprofile-kernel
> ftrace ABI")
> Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Applied to powerpc fixes, thanks.
https://git.kernel.org/powerpc/c/a4979a7e71eb8da976cbe4a0a1fa50
cheers
next prev parent reply other threads:[~2017-06-19 12:22 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-01 10:48 [PATCH v2 0/4] ftrace/kprobe fixes Naveen N. Rao
2017-06-01 10:48 ` [PATCH v2 1/4] powerpc/kprobes: Pause function_graph tracing during jprobes handling Naveen N. Rao
2017-06-08 13:43 ` Masami Hiramatsu
2017-06-08 15:33 ` Steven Rostedt
2017-06-19 12:22 ` [v2, " Michael Ellerman
2017-06-01 10:48 ` [PATCH v2 2/4] powerpc/ftrace: Pass the correct stack pointer for DYNAMIC_FTRACE_WITH_REGS Naveen N. Rao
2017-06-19 12:22 ` Michael Ellerman [this message]
2017-06-01 10:48 ` [PATCH v2 3/4] powerpc/kprobes_on_ftrace: Skip livepatch_handler() for jprobes Naveen N. Rao
2017-06-08 13:59 ` Masami Hiramatsu
2017-06-15 11:19 ` Michael Ellerman
2017-06-15 15:32 ` Naveen N. Rao
2017-06-19 12:22 ` [v2, " Michael Ellerman
2017-06-01 10:48 ` [PATCH v2 4/4] powerpc/xmon: Disable ftrace while in xmon Naveen N. Rao
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