From: cartercheng@gmail.com (Carter Cheng)
To: kernelnewbies@lists.kernelnewbies.org
Subject: link time analysis for the kernel.
Date: Fri, 12 Oct 2018 03:46:57 +0800 [thread overview]
Message-ID: <CALS6=qWMiqf0+o0Nq9Zi_tGey==y9=iteNkRcSK31N+=2Jn5kg@mail.gmail.com> (raw)
In-Reply-To: <CALS6=qVc1E7=HW3fL5dfKQqQ4mgmt10n_ZKPd1fxodS6+-o+8A@mail.gmail.com>
sorry not a kernel loader but an ELF loader.
On Fri, Oct 12, 2018 at 2:55 AM Carter Cheng <cartercheng@gmail.com> wrote:
> Actually I have compiled and installed kernels before. I am wondering
> however if LTO still works for compiling kernel images on clang or gcc
> since my understanding is the kernel code includes a kernel loader which
> loads the ELF format but the image of an OS kernel is loaded either
> directly or via a bootloader which my understanding is cannot read ELF(is
> this correct?).
>
>
>
> On Fri, Oct 12, 2018 at 2:02 AM <o@goosey.org> wrote:
>
>>
>>
>> 11.10.2018, 17:48, "Carter Cheng" <cartercheng@gmail.com>:
>>
>> Hi,
>>
>>
>>
>> Hello,
>>
>> I want to ask pardon me and have you ever compiled a linux kernel?
>> In my opinion you should first examine gcc ld and make process :)
>>
>> The elf format executable format and the process after compiling the c
>> code.
>> Please read:
>>
>> http://www.ntu.edu.sg/home/ehchua/programming/cpp/gcc_make.html
>>
>> keep calm and go step by step and continue to learn c, gcc, ld, make, c
>> code compile to machine code.
>>
>> Ozgur
>>
>>
>>
>>
>> There are some detaills about the current procedures for linking the
>> kernel that I am unfamiliar with. My understanding is that GCC and Clang
>> both have the ability to do link time analysis and transforms on code but
>> is it possible to write link time passes that will run on the kernel since
>> the linking phase is a bit different (i.e. doesnt produce an ELF file)?
>>
>> Regards,
>>
>> Carter.
>> ,
>>
>> _______________________________________________
>> Kernelnewbies mailing list
>> Kernelnewbies at kernelnewbies.org
>> https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>>
>>
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next prev parent reply other threads:[~2018-10-11 19:46 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-11 13:45 link time analysis for the kernel Carter Cheng
2018-10-11 18:02 ` o at goosey.org
2018-10-11 18:55 ` Carter Cheng
2018-10-11 19:04 ` Ozgur
2018-10-11 19:07 ` Ozgur
2018-10-11 19:46 ` Carter Cheng [this message]
2018-10-12 2:20 ` valdis.kletnieks at vt.edu
2018-10-12 6:49 ` Carter Cheng
2018-10-12 7:05 ` Ozgur
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