linux-kernel - Re: [PATCH v3 00/16] objtool: Enable and implement --mcount option on powerpc

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Date:   Wed, 21 Sep 2022 14:40:44 +0530
From:   Sathvika Vasireddy <sv@...ux.vnet.ibm.com>
To:     Josh Poimboeuf <jpoimboe@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>
Cc:     Sathvika Vasireddy <sv@...ux.ibm.com>, aik@...abs.ru,
        chenzhongjin@...wei.com, npiggin@...il.com,
        linux-kernel@...r.kernel.org, mingo@...hat.com,
        rostedt@...dmis.org, jpoimboe@...hat.com,
        naveen.n.rao@...ux.vnet.ibm.com, mbenes@...e.cz,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v3 00/16] objtool: Enable and implement --mcount option on
 powerpc

Hi Josh,

On 14/09/22 05:45, Josh Poimboeuf wrote:

> On Tue, Sep 13, 2022 at 04:13:52PM +0200, Peter Zijlstra wrote:
>> On Mon, Sep 12, 2022 at 01:50:04PM +0530, Sathvika Vasireddy wrote:
>>> Christophe Leroy (4):
>>>    objtool: Fix SEGFAULT
>>>    objtool: Use target file endianness instead of a compiled constant
>>>    objtool: Use target file class size instead of a compiled constant
>>> Sathvika Vasireddy (12):
>>>    objtool: Add --mnop as an option to --mcount
>>>    objtool: Read special sections with alts only when specific options are selected
>>>    objtool: Use macros to define arch specific reloc types
>>>    objtool: Add arch specific function arch_ftrace_match()
>>>    objtool/powerpc: Enable objtool to be built on ppc
>>>    objtool/powerpc: Add --mcount specific implementation
>>>   tools/objtool/arch/powerpc/Build              |   2 +
>>>   tools/objtool/arch/powerpc/decode.c           | 101 ++++++++++++++++++
>>>   .../arch/powerpc/include/arch/cfi_regs.h      |  11 ++
>>>   tools/objtool/arch/powerpc/include/arch/elf.h |  10 ++
>>>   .../arch/powerpc/include/arch/special.h       |  21 ++++
>>>   tools/objtool/arch/powerpc/special.c          |  19 ++++
>>>   tools/objtool/arch/x86/decode.c               |   5 +
>>>   tools/objtool/arch/x86/include/arch/elf.h     |   2 +
>>>   .../arch/x86/include/arch/endianness.h        |   9 --
>>>   tools/objtool/builtin-check.c                 |  14 +++
>>>   tools/objtool/check.c                         |  53 ++++-----
>>>   tools/objtool/elf.c                           |   8 +-
>>>   tools/objtool/include/objtool/arch.h          |   2 +
>>>   tools/objtool/include/objtool/builtin.h       |   1 +
>>>   tools/objtool/include/objtool/elf.h           |   8 ++
>>>   tools/objtool/include/objtool/endianness.h    |  32 +++---
>>>   tools/objtool/orc_dump.c                      |  11 +-
>>>   tools/objtool/orc_gen.c                       |   4 +-
>>>   tools/objtool/special.c                       |   3 +-
>> This seems to painlessly merge with the objtool changes I have in
>> queue.git/call-depth-tracking. After that all I need is the below little
>> patch to make it to build ppc44x_defconfig + CONFIG_DYNAMIC_FTRACE=y.
>>
>> So I think these patches can go through the powerpc tree if Michael
>> wants. Josh you okay with that, or should we do something complicated?
> I'm all for avoiding complicated, but let me try to give it a proper
> review first.

Did you get a chance to review this patch set?

- Sathvika