From: Balbir Singh <bsingharora@gmail.com>
To: Torsten Duwe <duwe@lst.de>, Michael Ellerman <mpe@ellerman.id.au>
Cc: Jiri Kosina <jkosina@suse.cz>, Miroslav Benes <mbenes@suse.cz>,
Petr Mladek <pmladek@suse.com>, Jessica Yu <jeyu@redhat.com>,
Steven Rostedt <rostedt@goodmis.org>,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
live-patching@vger.kernel.org
Subject: Re: [PATCH v8 4/8] ppc64 ftrace_with_regs configuration variables
Date: Thu, 11 Feb 2016 18:48:17 +1100 [thread overview]
Message-ID: <1455176897.2885.12.camel@gmail.com> (raw)
In-Reply-To: <20160210174450.9C065692C8@newverein.lst.de>
On Wed, 2016-02-10 at 17:25 +0100, Torsten Duwe wrote:
snip
> diff --git a/arch/powerpc/gcc-mprofile-kernel-notrace.sh b/arch/powerpc/gcc-mprofile-kernel-notrace.sh
> new file mode 100755
> index 0000000..68d6482
> --- /dev/null
> +++ b/arch/powerpc/gcc-mprofile-kernel-notrace.sh
> @@ -0,0 +1,33 @@
> +#!/bin/sh
> +# Test whether the compile option -mprofile-kernel
> +# generates profiling code ( = a call to mcount), and
> +# whether a function without any global references sets
> +# the TOC pointer properly at the beginning, and
> +# whether the "notrace" function attribute successfully
> +# suppresses the _mcount call.
> +
> +echo "int func() { return 0; }" | \
> + $* -S -x c -O2 -p -mprofile-kernel - -o - 2> /dev/null | \
> + grep -q "mcount"
> +
> +trace_result=$?
> +
> +echo "int func() { return 0; }" | \
> + $* -S -x c -O2 -p -mprofile-kernel - -o - 2> /dev/null | \
> + sed -n -e '/func:/,/bl _mcount/p' | grep -q TOC
> +
> +leaf_toc_result=$?
> +
leaf_toc_result failed for me with gcc 5. I'll try and grab gcc-6
and give the patches a spin
> +/bin/echo -e "#include \nnotrace int func() { return 0; }" | \
> + $* -S -x c -O2 -p -mprofile-kernel - -o - 2> /dev/null | \
> + grep -q "mcount"
> +
> +notrace_result=$?
> +
> +if [ "$trace_result" -eq "0" -a \
> + "$leaf_toc_result" -eq "0" -a \
> + "$notrace_result" -eq "1" ]; then
> + echo y
> +else
> + echo n
> +fi
next prev parent reply other threads:[~2016-02-11 7:48 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-10 17:29 [PATCH v8 0/8] ftrace with regs + live patching for ppc64 LE (ABI v2) Torsten Duwe
2016-01-28 15:32 ` [PATCH v8 8/8] livepatch: Detect offset for the ftrace location during build Torsten Duwe
2016-02-12 16:13 ` Balbir Singh
2016-02-12 16:45 ` Petr Mladek
2016-02-13 1:33 ` Balbir Singh
2016-02-16 5:47 ` Kamalesh Babulal
2016-02-16 8:23 ` Torsten Duwe
2016-02-16 10:30 ` Kamalesh Babulal
2016-02-16 10:39 ` Torsten Duwe
2016-02-16 13:57 ` Petr Mladek
2016-02-17 3:08 ` Michael Ellerman
2016-02-23 17:00 ` Torsten Duwe
2016-02-24 6:37 ` Balbir Singh
2016-02-24 6:55 ` Balbir Singh
2016-02-24 9:23 ` Torsten Duwe
2016-02-24 11:22 ` Balbir Singh
2016-02-24 7:51 ` Kamalesh Babulal
2016-02-10 16:21 ` [PATCH v8 1/8] ppc64 (le): prepare for -mprofile-kernel Torsten Duwe
2016-02-17 10:55 ` Michael Ellerman
2016-02-17 11:30 ` Torsten Duwe
2016-02-17 11:39 ` Michael Ellerman
2016-02-10 16:22 ` [PATCH v8 2/8] ppc64le FTRACE_WITH_REGS implementation Torsten Duwe
2016-02-10 16:22 ` [PATCH v8 3/8] ppc use ftrace_modify_all_code default Torsten Duwe
2016-02-10 16:25 ` [PATCH v8 4/8] ppc64 ftrace_with_regs configuration variables Torsten Duwe
2016-02-11 7:48 ` Balbir Singh [this message]
2016-02-11 8:39 ` Kamalesh Babulal
2016-02-11 9:35 ` Balbir Singh
2016-02-11 13:00 ` Murali Sampath
2016-02-11 13:00 ` Murali Sampath
2016-02-11 8:42 ` Torsten Duwe
2016-02-11 9:34 ` Balbir Singh
2016-02-15 10:27 ` Michael Ellerman
2016-02-15 12:56 ` Jiri Kosina
2016-02-15 14:04 ` Torsten Duwe
2016-02-15 22:21 ` Torsten Duwe
2016-02-16 4:53 ` Balbir Singh
2016-02-16 10:09 ` Michael Ellerman
2016-02-16 10:35 ` Torsten Duwe
2016-02-10 16:27 ` [PATCH v8 5/8] ppc64 ftrace_with_regs: disable profiling for some files Torsten Duwe
2016-02-10 16:34 ` [PATCH v8 6/8] Implement kernel live patching for ppc64le (ABIv2) Torsten Duwe
2016-02-11 9:01 ` Miroslav Benes
2016-02-10 16:36 ` [PATCH v8 7/8] Enable LIVEPATCH to be configured on ppc64le and add livepatch.o if it is selected Torsten Duwe
2016-02-11 6:18 ` [PATCH v8 0/8] ftrace with regs + live patching for ppc64 LE (ABI v2) Balbir Singh
2016-02-11 8:38 ` Torsten Duwe
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