From: takahiro.akashi@linaro•org (AKASHI Takahiro)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v5 0/7] arm64: Add ftrace support
Date: Wed, 12 Mar 2014 10:47:20 +0900 [thread overview]
Message-ID: <531FBCA8.2080805@linaro.org> (raw)
In-Reply-To: <20140311143535.GE7944@mudshark.cambridge.arm.com>
Hi,
On 03/11/2014 11:35 PM, Will Deacon wrote:
> Hi Akashi,
>
> On Fri, Feb 28, 2014 at 05:18:37AM +0000, AKASHI Takahiro wrote:
>> This patchset implements a function tracer on arm64.
>> There was another implementation from Cavium network, but both of us agreed
>> to use my patchset as future base. He is supposed to review this code, too.
>>
>> The only issue that I had some concern on was "fault protection" code
>> in prepare_ftrace_return(). With discussions with Steven and Tim (as author
>> of arm ftrace), I removed that code since I'm not quite sure about possibility
>> of "fault" occurrences in this function.
>>
>> The code is tested on ARMv8 Fast Model with the following tracers & events:
>> function tracer with dynamic ftrace
>> function graph tracer with dynamic ftrace
>> syscall tracepoint
>> irqsoff & preemptirqsoff (which use CALLER_ADDRx)
>> and also verified with in-kernel tests, FTRACE_SELFTEST, FTRACE_STARTUP_TEST
>> and EVENT_TRACE_TEST_SYSCALLS.
>>
>> Prerequisites are:
>> * "arm64: Add regs_return_value() in syscall.h"
>> * "arm64: make a single hook to syscall_trace() for all syscall features" patch
>
> It looks like there might be some more dependencies that that. Do you have a
> branch anywhere containing this series, along with all the dependencies so I
> can have a play?
I think you saw the following messages:
> HOSTCC scripts/recordmcount
> /.../linux-aarch64/scripts/recordmcount.c: In function 'do_file':
> /.../linux-aarch64/scripts/recordmcount.c:350:7: error:
> 'EM_AARCH64' undeclared (first use in this function)
> /.../linux-aarch64/scripts/recordmcount.c:350:7: note:
> each undeclared identifier is reported only once for each function it appears in
> /.../linux-aarch64/scripts/recordmcount.c:351:15: error:
> 'R_AARCH64_ABS64' undeclared (first > use in this function)
> make[2]: *** [scripts/recordmcount] Error 1
> make[1]: *** [scripts] Error 2
> make: *** [sub-make] Error 2
This happens when a header file, elf.h, on "your host machine" does not have
definitions of EM_AARCH64 nor R_AARCH64_ABS64 because "recordmcount" is a binary
utility on host(x86), not target. It is very likely for most distros.
(I mentioned this in the cover letter, but the description might not be clear.)
Possible solutions are:
1) Define both macros directly in scripts/recordmcount.c
2) Use perl version of recordmcount
Currently I take 1), but it is a workaround.
2) should work with my current patch, too. But you need to remove HAVE_C_RECORDCOUNT
from arm64/Kconfig.
Which one do you prefer? I will include a fix for 1) in the next revision, anyway.
Thanks,
-Takahiro AKASHI
> Cheers,
>
> Will
>
next prev parent reply other threads:[~2014-03-12 1:47 UTC|newest]
Thread overview: 119+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-24 7:08 [PATCH v2 0/6] arm64: Add ftrace support AKASHI Takahiro
2013-10-24 7:08 ` [PATCH v2 1/6] " AKASHI Takahiro
2013-10-24 7:08 ` [PATCH v2 2/6] arm64: ftrace: Add dynamic " AKASHI Takahiro
2013-10-24 7:08 ` [PATCH v2 3/6] arm64: ftrace: Add CALLER_ADDRx macros AKASHI Takahiro
2013-10-24 7:08 ` [PATCH v2 4/6] ftrace: Add arm64 support to recordmcount AKASHI Takahiro
2013-10-24 7:08 ` [PATCH v2 5/6] arm64: ftrace: Add system call tracepoint AKASHI Takahiro
2013-10-24 7:08 ` [PATCH v2 6/6] arm64: Add 'notrace' attribute to unwind_frame() for ftrace AKASHI Takahiro
2014-02-07 10:18 ` [PATCH v3 0/6] arm64: Add ftrace support AKASHI Takahiro
2014-02-07 10:18 ` [PATCH v3 1/6] " AKASHI Takahiro
2014-02-10 15:03 ` Arnd Bergmann
2014-02-10 15:19 ` Steven Rostedt
[not found] ` <CAB5YjtCr2KL_q1FF8kO_VKe+feg7f9qFRKtwf3xj2h0ENwuB5g@mail.gmail.com>
2014-02-12 11:03 ` Arnd Bergmann
2014-02-17 18:12 ` Will Deacon
2014-02-19 10:46 ` AKASHI Takahiro
2014-02-07 10:18 ` [PATCH v3 2/6] arm64: ftrace: Add dynamic " AKASHI Takahiro
2014-02-07 10:18 ` [PATCH v3 3/6] arm64: ftrace: Add CALLER_ADDRx macros AKASHI Takahiro
2014-02-07 10:18 ` [PATCH v3 4/6] ftrace: Add arm64 support to recordmcount AKASHI Takahiro
2014-02-07 10:18 ` [PATCH v3 5/6] arm64: ftrace: Add system call tracepoint AKASHI Takahiro
2014-02-17 19:29 ` Will Deacon
2014-02-19 10:48 ` AKASHI Takahiro
2014-02-07 10:18 ` [PATCH v3 6/6] arm64: Add 'notrace' attribute to unwind_frame() for ftrace AKASHI Takahiro
2014-02-10 14:21 ` [PATCH v3 0/6] arm64: Add ftrace support Kulkarni, Ganapatrao
2014-02-25 9:23 ` [PATCH v4 0/7] " AKASHI Takahiro
2014-02-25 9:23 ` [PATCH v4 1/7] " AKASHI Takahiro
2014-02-25 15:38 ` Kulkarni, Ganapatrao
2014-02-28 5:06 ` AKASHI Takahiro
2014-02-25 9:23 ` [PATCH v4 2/7] arm64: ftrace: Add dynamic " AKASHI Takahiro
2014-02-25 9:23 ` [PATCH v4 3/7] arm64: ftrace: Add CALLER_ADDRx macros AKASHI Takahiro
2014-02-25 9:23 ` [PATCH v4 4/7] ftrace: Add arm64 support to recordmcount AKASHI Takahiro
2014-02-25 9:23 ` [PATCH v4 5/7] arm64: ftrace: Add system call tracepoint AKASHI Takahiro
2014-02-25 9:23 ` [PATCH v4 6/7] arm64: Add 'notrace' attribute to unwind_frame() for ftrace AKASHI Takahiro
2014-02-25 9:23 ` [PATCH v4 7/7] arm64: add __ASSEMBLY__ in asm/insn.h AKASHI Takahiro
2014-02-28 5:18 ` [PATCH v5 0/7] arm64: Add ftrace support AKASHI Takahiro
2014-02-28 5:18 ` [PATCH v5 1/7] " AKASHI Takahiro
2014-02-28 5:18 ` [PATCH v5 2/7] arm64: ftrace: Add dynamic " AKASHI Takahiro
2014-02-28 5:18 ` [PATCH v5 3/7] arm64: ftrace: Add CALLER_ADDRx macros AKASHI Takahiro
2014-02-28 5:18 ` [PATCH v5 4/7] ftrace: Add arm64 support to recordmcount AKASHI Takahiro
2014-02-28 5:18 ` [PATCH v5 5/7] arm64: ftrace: Add system call tracepoint AKASHI Takahiro
2014-02-28 5:18 ` [PATCH v5 6/7] arm64: Add 'notrace' attribute to unwind_frame() for ftrace AKASHI Takahiro
2014-02-28 5:18 ` [PATCH v5 7/7] arm64: add __ASSEMBLY__ in asm/insn.h AKASHI Takahiro
2014-03-11 14:35 ` [PATCH v5 0/7] arm64: Add ftrace support Will Deacon
2014-03-12 1:47 ` AKASHI Takahiro [this message]
2014-03-12 1:58 ` Steven Rostedt
2014-03-12 2:02 ` Steven Rostedt
2014-03-13 10:13 ` [PATCH v6 " AKASHI Takahiro
2014-03-13 10:13 ` [PATCH v6 1/7] arm64: add __ASSEMBLY__ in asm/insn.h AKASHI Takahiro
2014-03-13 12:19 ` Will Deacon
2014-03-13 10:13 ` [PATCH v6 2/7] arm64: Add 'notrace' attribute to unwind_frame() for ftrace AKASHI Takahiro
2014-03-13 12:19 ` Will Deacon
2014-03-13 10:13 ` [PATCH v6 3/7] ftrace: Add arm64 support to recordmcount AKASHI Takahiro
2014-03-13 12:38 ` Will Deacon
2014-03-13 14:57 ` AKASHI Takahiro
2014-03-13 16:05 ` Will Deacon
2014-03-13 10:13 ` [PATCH v6 4/7] arm64: Add ftrace support AKASHI Takahiro
2014-03-13 17:08 ` Will Deacon
2014-03-13 18:27 ` Steven Rostedt
2014-03-13 18:37 ` Will Deacon
2014-03-13 18:49 ` Steven Rostedt
2014-03-14 4:45 ` AKASHI Takahiro
2014-03-14 10:07 ` Will Deacon
2014-03-14 16:13 ` AKASHI Takahiro
2014-03-13 10:13 ` [PATCH v6 5/7] arm64: ftrace: Add dynamic " AKASHI Takahiro
2014-03-13 18:10 ` Will Deacon
2014-03-13 18:33 ` Steven Rostedt
2014-03-14 5:28 ` AKASHI Takahiro
2014-03-14 5:26 ` AKASHI Takahiro
2014-03-13 10:13 ` [PATCH v6 6/7] arm64: ftrace: Add CALLER_ADDRx macros AKASHI Takahiro
2014-03-13 15:54 ` Will Deacon
2014-03-13 18:07 ` Steven Rostedt
2014-03-14 4:55 ` AKASHI Takahiro
2014-03-14 3:00 ` AKASHI Takahiro
2014-03-14 10:09 ` Will Deacon
2014-03-14 16:15 ` AKASHI Takahiro
2014-03-13 10:13 ` [PATCH v6 7/7] arm64: ftrace: Add system call tracepoint AKASHI Takahiro
2014-03-13 16:25 ` Will Deacon
2014-03-14 3:50 ` AKASHI Takahiro
2014-03-15 5:40 ` [PATCH v7 0/7] arm64: Add ftrace support AKASHI Takahiro
2014-03-15 5:40 ` [PATCH v7 1/7] arm64: add __ASSEMBLY__ in asm/insn.h AKASHI Takahiro
2014-03-15 5:40 ` [PATCH v7 2/7] arm64: Add 'notrace' attribute to unwind_frame() for ftrace AKASHI Takahiro
2014-03-15 5:40 ` [PATCH v7 3/7] ftrace: Add arm64 support to recordmcount AKASHI Takahiro
2014-04-16 13:31 ` Will Deacon
2014-04-30 9:54 ` [PATCH v8 0/8] arm64: Add ftrace support AKASHI Takahiro
2014-04-30 9:54 ` [PATCH v8 1/8] ftrace: make CALLER_ADDRx macros more generic AKASHI Takahiro
2014-05-02 18:13 ` Will Deacon
2014-05-02 19:02 ` Steven Rostedt
2014-05-02 19:03 ` Steven Rostedt
2014-05-02 19:19 ` Steven Rostedt
2014-05-12 15:58 ` Will Deacon
2014-05-12 16:05 ` Steven Rostedt
2014-05-12 16:12 ` Will Deacon
2014-05-12 17:23 ` Steven Rostedt
2014-05-20 11:29 ` AKASHI Takahiro
2014-05-20 11:31 ` [PATCH v8_1] " AKASHI Takahiro
2014-06-11 12:34 ` [PATCH v8 1/8] " Geert Uytterhoeven
2014-06-11 13:23 ` [PATCH] arm/ftrace: Fix function_return_addr() to function_return_address() Steven Rostedt
2014-06-11 13:38 ` Geert Uytterhoeven
2014-06-11 13:44 ` Steven Rostedt
2014-04-30 9:54 ` [PATCH v8 2/8] arm64: add __ASSEMBLY__ in asm/insn.h AKASHI Takahiro
2014-04-30 9:54 ` [PATCH v8 3/8] arm64: Add 'notrace' attribute to unwind_frame() for ftrace AKASHI Takahiro
2014-04-30 9:54 ` [PATCH v8 4/8] ftrace: Add arm64 support to recordmcount AKASHI Takahiro
2014-04-30 9:54 ` [PATCH v8 5/8] arm64: Add ftrace support AKASHI Takahiro
2014-05-28 20:19 ` Mark Brown
2014-05-29 8:07 ` Will Deacon
2014-05-29 9:47 ` Mark Brown
2014-04-30 9:54 ` [PATCH v8 6/8] arm64: ftrace: Add dynamic " AKASHI Takahiro
2014-04-30 9:54 ` [PATCH v8 7/8] arm64: ftrace: Add CALLER_ADDRx macros AKASHI Takahiro
2014-04-30 9:54 ` [PATCH v8 8/8] arm64: ftrace: Add system call tracepoint AKASHI Takahiro
2014-03-15 5:45 ` [PATCH v7 4/7] arm64: Add ftrace support AKASHI Takahiro
2014-04-16 13:45 ` Will Deacon
2014-03-15 5:45 ` [PATCH v7 5/7] arm64: ftrace: Add dynamic " AKASHI Takahiro
2014-04-16 13:48 ` Will Deacon
2014-03-15 5:45 ` [PATCH v7 6/7] arm64: ftrace: Add CALLER_ADDRx macros AKASHI Takahiro
2014-04-16 13:52 ` Will Deacon
2014-04-28 10:41 ` AKASHI Takahiro
2014-05-27 13:10 ` [for-next][PATCH] ftrace: Make CALLER_ADDRx macros more generic Steven Rostedt
2014-05-27 18:49 ` Will Deacon
2014-05-29 5:27 ` AKASHI Takahiro
2014-05-29 8:10 ` Will Deacon
2014-03-15 5:45 ` [PATCH v7 7/7] arm64: ftrace: Add system call tracepoint AKASHI Takahiro
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