From: rostedt@goodmis.org (Steven Rostedt)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 03/10] ftrace: allow building without frame pointers
Date: Tue, 23 Feb 2010 08:44:42 -0500 [thread overview]
Message-ID: <1266932682.19540.15.camel@frodo> (raw)
In-Reply-To: <1266090518-31120-4-git-send-email-rabin@rab.in>
On Sun, 2010-02-14 at 01:18 +0530, Rabin Vincent wrote:
> With current gcc, compiling with both -pg and -fomit-frame-pointer is
> not allowed. However, -pg can be used to build without actually
> specying -fno-omit-frame-pointer, upon which the defaut behaviour for
> the target will be used.
>
> On ARM, it is not possible to build a Thumb-2 kernel with
> -fno-omit-frame-pointer (FRAME_POINTERS depends on !THUMB2_KERNEL). In
> order to support ftrace for Thumb-2, we need to be able to allow a
> combination of FUNCTION_TRACER and !FRAME_POINTER. We do this by
> omitting -fomit-frame-pointer if ftrace is enabled.
>
> Signed-off-by: Rabin Vincent <rabin@rab.in>
> ---
> Makefile | 3 +++
> 1 files changed, 3 insertions(+), 0 deletions(-)
>
> diff --git a/Makefile b/Makefile
> index 67d6cff..72d90de 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -546,8 +546,11 @@ endif
> ifdef CONFIG_FRAME_POINTER
> KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
> else
> +ifndef CONFIG_FUNCTION_TRACER
Is this needed? Selecting FUNCTION_TRACER also selects FRAME_POINTER,
which this change is in the else part of that #if.
-- Steve
> +# -fomit-frame-pointer is incompatible with -pg
> KBUILD_CFLAGS += -fomit-frame-pointer
> endif
> +endif
>
> ifdef CONFIG_DEBUG_INFO
> KBUILD_CFLAGS += -g
next prev parent reply other threads:[~2010-02-23 13:44 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-13 19:48 [PATCH 00/10] ARM: ftrace: cleanups, Thumb-2, and dynamic ftrace Rabin Vincent
2010-02-13 19:48 ` [PATCH 01/10] ARM: ftrace: clean up mcount assembly indentation Rabin Vincent
2010-02-13 20:18 ` Uwe Kleine-König
2010-02-22 18:36 ` Frederic Weisbecker
2010-02-13 19:48 ` [PATCH 02/10] ARM: ftrace: document mcount formats Rabin Vincent
2010-02-13 20:37 ` Uwe Kleine-König
2010-02-22 18:06 ` Rabin Vincent
2010-02-22 19:20 ` Uwe Kleine-König
2010-02-23 19:42 ` Rabin Vincent
2010-02-23 20:27 ` Uwe Kleine-König
2010-02-22 18:41 ` Frederic Weisbecker
2010-02-13 19:48 ` [PATCH 03/10] ftrace: allow building without frame pointers Rabin Vincent
2010-02-22 18:36 ` Frederic Weisbecker
2010-02-23 13:44 ` Steven Rostedt [this message]
2010-02-13 19:48 ` [PATCH 04/10] ARM: " Rabin Vincent
2010-02-22 19:05 ` Frederic Weisbecker
2010-02-23 13:18 ` Steven Rostedt
2010-02-23 17:11 ` Frederic Weisbecker
2010-02-23 17:58 ` Rabin Vincent
2010-02-23 18:03 ` Steven Rostedt
2010-02-23 18:41 ` Rabin Vincent
2010-02-23 13:47 ` Steven Rostedt
2010-02-13 19:48 ` [PATCH 05/10] ARM: ftrace: add ENDPROC annotations Rabin Vincent
2010-02-13 22:54 ` Catalin Marinas
2010-02-13 19:48 ` [PATCH 06/10] ARM: ftrace: add Thumb-2 support Rabin Vincent
2010-02-13 23:27 ` Catalin Marinas
2010-02-14 16:38 ` Rabin Vincent
2010-02-13 19:48 ` [PATCH 07/10] ftrace: pass KBUILD_CFLAGS to record_mcount.pl Rabin Vincent
2010-02-23 13:30 ` Steven Rostedt
2010-02-23 18:23 ` Rabin Vincent
2010-02-23 18:37 ` Steven Rostedt
2010-02-13 19:48 ` [PATCH 08/10] ARM: ftrace: fix and update dynamic ftrace Rabin Vincent
2010-02-14 11:08 ` Uwe Kleine-König
2010-02-14 15:53 ` Rabin Vincent
2010-02-13 19:48 ` [PATCH 09/10] ARM: ftrace: add Thumb-2 support to " Rabin Vincent
2010-02-23 13:35 ` Steven Rostedt
2010-02-23 17:10 ` Rabin Vincent
2010-02-13 19:48 ` [PATCH 10/10] ARM: ftrace: enable " Rabin Vincent
2010-02-22 18:16 ` [PATCH 00/10] ARM: ftrace: cleanups, Thumb-2, and " Rabin Vincent
-- strict thread matches above, loose matches on Subject: below --
2010-03-13 6:49 [PATCH 00/10] ARM: ftrace: cleanups, Thumb-2, and dynamic ftrace (v2) Rabin Vincent
2010-03-13 6:49 ` [PATCH 03/10] ftrace: allow building without frame pointers Rabin Vincent
2010-03-13 17:36 ` Steven Rostedt
2010-03-15 18:45 ` Rabin Vincent
2010-03-14 16:56 ` Steven Rostedt
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