From: Andi Kleen <andi@firstfloor.org>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Andi Kleen <andi@firstfloor.org>,
linux-kernel@vger.kernel.org, sam@ravnborg.org, x86@kernel.org,
linux-kbuild@vger.kernel.org, Andi Kleen <ak@linux.intel.com>
Subject: Re: [PATCH 1/6] kbuild: Remove relocations from kallsyms table
Date: Tue, 18 Feb 2014 19:50:08 +0100 [thread overview]
Message-ID: <20140218185007.GB22728@two.firstfloor.org> (raw)
In-Reply-To: <53036E26.1040701@zytor.com>
On Tue, Feb 18, 2014 at 06:28:54AM -0800, H. Peter Anvin wrote:
> On 02/18/2014 06:24 AM, Andi Kleen wrote:
> > From: Andi Kleen <ak@linux.intel.com>
> >
> > Remove the ELF relocations from the kallsyms_address[] table.
> > Instead we just store offsets to _text and relocate that while
> > accessing the kallsyms table. This is done with a new
> > kallsyms_offsets[] table. With these changes .tmp_kallsyms*.o
> > becomes relocation free.
> >
> > In theory this would also allow to shrink the kallsyms table
> > on 64bit by using offsets.
> >
>
> Why not do that, then?
I tried it once, but it didn't boot for some reason. Didn't have
time to track it down so I removed it. Could be done as followon
work.
-Andi
next prev parent reply other threads:[~2014-02-18 18:50 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-18 14:24 Single pass kallsyms v3 Andi Kleen
2014-02-18 14:24 ` [PATCH 1/6] kbuild: Remove relocations from kallsyms table Andi Kleen
2014-02-18 14:28 ` H. Peter Anvin
2014-02-18 18:50 ` Andi Kleen [this message]
2014-02-18 14:24 ` [PATCH 2/6] kbuild: Put kallsyms into own section Andi Kleen
2014-02-18 14:24 ` [PATCH 3/6] kbuild: Don't include const variable in kallsyms with !KALLSYMS_ALL Andi Kleen
2014-02-18 14:24 ` [PATCH 4/6] kbuild: Support padding in kallsyms tables v2 Andi Kleen
2014-02-18 14:24 ` [PATCH 5/6] kbuild: Use single pass kallsyms Andi Kleen
2014-02-18 14:24 ` [PATCH 6/6] kbuild: Remove .dot postfixes in kallsyms Andi Kleen
-- strict thread matches above, loose matches on Subject: below --
2014-02-14 21:17 Updated single-pass kallsyms patchkit for LTO Andi Kleen
2014-02-14 21:17 ` [PATCH 1/6] kbuild: Remove relocations from kallsyms table Andi Kleen
2014-02-08 7:50 Andi Kleen
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