From: Will Deacon <will.deacon@arm.com>
To: Jungseok Lee <jungseoklee85@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>,
Mark Rutland <Mark.Rutland@arm.com>,
Catalin Marinas <Catalin.Marinas@arm.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
AKASHI Takahiro <takahiro.akashi@linaro.org>,
"broonie@kernel.org" <broonie@kernel.org>,
"david.griego@linaro.org" <david.griego@linaro.org>,
"olof@lixom.net" <olof@lixom.net>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [RFC 2/3] arm64: refactor save_stack_trace()
Date: Mon, 20 Jul 2015 17:20:04 +0100 [thread overview]
Message-ID: <20150720162004.GL9908@arm.com> (raw)
In-Reply-To: <1357EA74-B972-4B99-ADB0-BC7E8F06DDB5@gmail.com>
Hi all,
On Fri, Jul 17, 2015 at 04:34:21PM +0100, Jungseok Lee wrote:
> On Jul 17, 2015, at 11:59 PM, Jungseok Lee wrote:
> > On Jul 17, 2015, at 11:41 PM, Steven Rostedt wrote:
> >> Thanks! Can you repost patch 1 with the changes I recommended, so that
> >> I can get an Acked-by from the arm64 maintainers and pull all the
> >> changes in together. This is fine for a 4.3 release, right? That is, it
> >> doesn't need to go into 4.2-rcs.
> >>
> >
> > It's not hard to repost a patch, but I feel like we have to wait for Akashi's response.
> > Also, it might be needed to consider Mark's comment on arch part.
> >
> > If they are okay, I will proceed.
>
> The [RFC 1/3] patch used in my environment is shaped as follows.
> I leave the hunk for *only* clear synchronization. This is why I choose this format
> instead of reposting a patch. I hope it would help to track down this thread.
>
> I think this is my best at this point.
>
> ----8<----
> diff --git a/arch/arm64/include/asm/ftrace.h b/arch/arm64/include/asm/ftrace.h
> index c5534fa..2b43e20 100644
> --- a/arch/arm64/include/asm/ftrace.h
> +++ b/arch/arm64/include/asm/ftrace.h
> @@ -13,8 +13,9 @@
>
> #include <asm/insn.h>
>
> -#define MCOUNT_ADDR ((unsigned long)_mcount)
> -#define MCOUNT_INSN_SIZE AARCH64_INSN_SIZE
> +#define MCOUNT_ADDR ((unsigned long)_mcount)
> +#define MCOUNT_INSN_SIZE AARCH64_INSN_SIZE
> +#define FTRACE_STACK_FRAME_OFFSET AARCH64_INSN_SIZE
>
> #ifndef __ASSEMBLY__
> #include <linux/compat.h>
> diff --git a/arch/arm64/kernel/stacktrace.c b/arch/arm64/kernel/stacktrace.c
> index 407991b..9ab67af 100644
> --- a/arch/arm64/kernel/stacktrace.c
> +++ b/arch/arm64/kernel/stacktrace.c
> @@ -20,6 +20,7 @@
> #include <linux/sched.h>
> #include <linux/stacktrace.h>
>
> +#include <asm/insn.h>
> #include <asm/stacktrace.h>
>
> /*
> @@ -52,7 +53,7 @@ int notrace unwind_frame(struct stackframe *frame)
> * -4 here because we care about the PC at time of bl,
> * not where the return will go.
> */
> - frame->pc = *(unsigned long *)(fp + 8) - 4;
> + frame->pc = *(unsigned long *)(fp + 8) - AARCH64_INSN_SIZE;
>
> return 0;
> }
The arm64 bits look fine to me:
Acked-by: Will Deacon <will.deacon@arm.com>
Steve: feel free to take this along with the other ftrace changes. I don't
anticipate any conflicts, but if anything crops up in -next we can sort
it out then.
Thanks!
Will
WARNING: multiple messages have this Message-ID (diff)
From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC 2/3] arm64: refactor save_stack_trace()
Date: Mon, 20 Jul 2015 17:20:04 +0100 [thread overview]
Message-ID: <20150720162004.GL9908@arm.com> (raw)
In-Reply-To: <1357EA74-B972-4B99-ADB0-BC7E8F06DDB5@gmail.com>
Hi all,
On Fri, Jul 17, 2015 at 04:34:21PM +0100, Jungseok Lee wrote:
> On Jul 17, 2015, at 11:59 PM, Jungseok Lee wrote:
> > On Jul 17, 2015, at 11:41 PM, Steven Rostedt wrote:
> >> Thanks! Can you repost patch 1 with the changes I recommended, so that
> >> I can get an Acked-by from the arm64 maintainers and pull all the
> >> changes in together. This is fine for a 4.3 release, right? That is, it
> >> doesn't need to go into 4.2-rcs.
> >>
> >
> > It's not hard to repost a patch, but I feel like we have to wait for Akashi's response.
> > Also, it might be needed to consider Mark's comment on arch part.
> >
> > If they are okay, I will proceed.
>
> The [RFC 1/3] patch used in my environment is shaped as follows.
> I leave the hunk for *only* clear synchronization. This is why I choose this format
> instead of reposting a patch. I hope it would help to track down this thread.
>
> I think this is my best at this point.
>
> ----8<----
> diff --git a/arch/arm64/include/asm/ftrace.h b/arch/arm64/include/asm/ftrace.h
> index c5534fa..2b43e20 100644
> --- a/arch/arm64/include/asm/ftrace.h
> +++ b/arch/arm64/include/asm/ftrace.h
> @@ -13,8 +13,9 @@
>
> #include <asm/insn.h>
>
> -#define MCOUNT_ADDR ((unsigned long)_mcount)
> -#define MCOUNT_INSN_SIZE AARCH64_INSN_SIZE
> +#define MCOUNT_ADDR ((unsigned long)_mcount)
> +#define MCOUNT_INSN_SIZE AARCH64_INSN_SIZE
> +#define FTRACE_STACK_FRAME_OFFSET AARCH64_INSN_SIZE
>
> #ifndef __ASSEMBLY__
> #include <linux/compat.h>
> diff --git a/arch/arm64/kernel/stacktrace.c b/arch/arm64/kernel/stacktrace.c
> index 407991b..9ab67af 100644
> --- a/arch/arm64/kernel/stacktrace.c
> +++ b/arch/arm64/kernel/stacktrace.c
> @@ -20,6 +20,7 @@
> #include <linux/sched.h>
> #include <linux/stacktrace.h>
>
> +#include <asm/insn.h>
> #include <asm/stacktrace.h>
>
> /*
> @@ -52,7 +53,7 @@ int notrace unwind_frame(struct stackframe *frame)
> * -4 here because we care about the PC at time of bl,
> * not where the return will go.
> */
> - frame->pc = *(unsigned long *)(fp + 8) - 4;
> + frame->pc = *(unsigned long *)(fp + 8) - AARCH64_INSN_SIZE;
>
> return 0;
> }
The arm64 bits look fine to me:
Acked-by: Will Deacon <will.deacon@arm.com>
Steve: feel free to take this along with the other ftrace changes. I don't
anticipate any conflicts, but if anything crops up in -next we can sort
it out then.
Thanks!
Will
next prev parent reply other threads:[~2015-07-20 16:20 UTC|newest]
Thread overview: 106+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-13 5:29 [RFC 0/3] arm64: ftrace: fix incorrect output from stack tracer AKASHI Takahiro
2015-07-13 5:29 ` AKASHI Takahiro
2015-07-13 5:29 ` [RFC 1/3] ftrace: adjust a function's pc to search for in check_stack() for arm64 AKASHI Takahiro
2015-07-13 5:29 ` AKASHI Takahiro
2015-07-13 15:24 ` Steven Rostedt
2015-07-13 15:24 ` Steven Rostedt
2015-07-15 0:22 ` AKASHI Takahiro
2015-07-15 0:22 ` AKASHI Takahiro
2015-07-13 5:29 ` [RFC 2/3] arm64: refactor save_stack_trace() AKASHI Takahiro
2015-07-13 5:29 ` AKASHI Takahiro
2015-07-14 12:47 ` Jungseok Lee
2015-07-14 12:47 ` Jungseok Lee
2015-07-14 13:31 ` Steven Rostedt
2015-07-14 13:31 ` Steven Rostedt
2015-07-15 0:20 ` AKASHI Takahiro
2015-07-15 0:20 ` AKASHI Takahiro
2015-07-15 2:51 ` Steven Rostedt
2015-07-15 2:51 ` Steven Rostedt
2015-07-15 11:41 ` AKASHI Takahiro
2015-07-15 11:41 ` AKASHI Takahiro
2015-07-15 14:55 ` Steven Rostedt
2015-07-15 14:55 ` Steven Rostedt
2015-07-15 16:13 ` Steven Rostedt
2015-07-15 16:13 ` Steven Rostedt
2015-07-16 0:27 ` AKASHI Takahiro
2015-07-16 0:27 ` AKASHI Takahiro
2015-07-16 1:08 ` AKASHI Takahiro
2015-07-16 1:08 ` AKASHI Takahiro
2015-07-16 1:38 ` Steven Rostedt
2015-07-16 1:38 ` Steven Rostedt
2015-07-17 10:46 ` Will Deacon
2015-07-17 10:46 ` Will Deacon
2015-07-16 13:29 ` Jungseok Lee
2015-07-16 13:29 ` Jungseok Lee
2015-07-16 13:54 ` Jungseok Lee
2015-07-16 13:54 ` Jungseok Lee
2015-07-16 14:24 ` Steven Rostedt
2015-07-16 14:24 ` Steven Rostedt
2015-07-16 15:01 ` Jungseok Lee
2015-07-16 15:01 ` Jungseok Lee
2015-07-16 15:31 ` Steven Rostedt
2015-07-16 15:31 ` Steven Rostedt
2015-07-16 15:52 ` Jungseok Lee
2015-07-16 15:52 ` Jungseok Lee
2015-07-16 20:22 ` Steven Rostedt
2015-07-16 20:22 ` Steven Rostedt
2015-07-17 2:49 ` AKASHI Takahiro
2015-07-17 2:49 ` AKASHI Takahiro
2015-07-17 3:21 ` Steven Rostedt
2015-07-17 3:21 ` Steven Rostedt
2015-07-16 16:16 ` Steven Rostedt
2015-07-16 16:16 ` Steven Rostedt
2015-07-17 12:40 ` Mark Rutland
2015-07-17 12:40 ` Mark Rutland
2015-07-17 12:51 ` Steven Rostedt
2015-07-17 12:51 ` Steven Rostedt
2015-07-17 13:00 ` Steven Rostedt
2015-07-17 13:00 ` Steven Rostedt
2015-07-17 14:28 ` Jungseok Lee
2015-07-17 14:28 ` Jungseok Lee
2015-07-17 14:41 ` Steven Rostedt
2015-07-17 14:41 ` Steven Rostedt
2015-07-17 14:59 ` Jungseok Lee
2015-07-17 14:59 ` Jungseok Lee
2015-07-17 15:34 ` Jungseok Lee
2015-07-17 15:34 ` Jungseok Lee
2015-07-17 16:01 ` Steven Rostedt
2015-07-17 16:01 ` Steven Rostedt
2015-07-20 16:20 ` Will Deacon [this message]
2015-07-20 16:20 ` Will Deacon
2015-07-20 23:53 ` AKASHI Takahiro
2015-07-20 23:53 ` AKASHI Takahiro
2015-07-21 10:26 ` AKASHI Takahiro
2015-07-21 10:26 ` AKASHI Takahiro
2015-07-21 14:34 ` Jungseok Lee
2015-07-21 14:34 ` Jungseok Lee
2015-08-03 9:09 ` Will Deacon
2015-08-03 9:09 ` Will Deacon
2015-08-03 14:01 ` Steven Rostedt
2015-08-03 14:01 ` Steven Rostedt
2015-08-03 14:04 ` Will Deacon
2015-08-03 14:04 ` Will Deacon
2015-08-03 16:30 ` Jungseok Lee
2015-08-03 16:30 ` Jungseok Lee
2015-08-03 16:57 ` Steven Rostedt
2015-08-03 16:57 ` Steven Rostedt
2015-08-03 17:22 ` Jungseok Lee
2015-08-03 17:22 ` Jungseok Lee
2015-08-03 17:32 ` Steven Rostedt
2015-08-03 17:32 ` Steven Rostedt
2015-08-04 7:41 ` AKASHI Takahiro
2015-08-04 7:41 ` AKASHI Takahiro
2015-07-17 2:04 ` AKASHI Takahiro
2015-07-17 2:04 ` AKASHI Takahiro
2015-07-17 14:38 ` Jungseok Lee
2015-07-17 14:38 ` Jungseok Lee
2015-07-16 14:28 ` Mark Rutland
2015-07-16 14:28 ` Mark Rutland
2015-07-16 14:34 ` Steven Rostedt
2015-07-16 14:34 ` Steven Rostedt
2015-07-17 2:09 ` AKASHI Takahiro
2015-07-17 2:09 ` AKASHI Takahiro
2015-07-13 5:29 ` [RFC 3/3] arm64: ftrace: mcount() should not create a stack frame AKASHI Takahiro
2015-07-13 5:29 ` AKASHI Takahiro
2015-07-13 15:01 ` [RFC 0/3] arm64: ftrace: fix incorrect output from stack tracer Jungseok Lee
2015-07-13 15:01 ` Jungseok Lee
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