From: Florian Weimer <fweimer@redhat.com>
To: hegdesmailbox@gmail.com, David Edelsohn <dje.gcc@gmail.com>,
Rafael Avila de Espindola <rafael.espindola@gmail.com>
Cc: Binutils Development <binutils@sourceware.org>,
Alan Modra <amodra@gmail.com>, Cary Coutant <ccoutant@gmail.com>,
Sriraman Tallam <tmsriram@google.com>,
gnu-gabi@sourceware.org, Xinliang David Li <davidxl@google.com>,
Sterling Augustine <saugustine@google.com>,
Paul Pluzhnikov <ppluzhnikov@google.com>,
Ian Lance Taylor <iant@google.com>,
"H.J. Lu" <hjl.tools@gmail.com>,
Rahul Chaudhry <rahulchaudhry@google.com>,
Luis Lozano <llozano@google.com>,
Peter Collingbourne <pcc@google.com>,
Rui Ueyama <ruiu@google.com>
Subject: Re: Reducing code size of Position Independent Executables (PIE) by shrinking the size of dynamic relocations section
Date: Sun, 01 Jan 2017 00:00:00 -0000 [thread overview]
Message-ID: <a68a5d29-09d6-e758-8680-d94f42762adf@redhat.com> (raw)
In-Reply-To: <a3e5c76c-8cb9-fc53-a30a-96b2c85079e1@gmail.com>
On 05/01/2017 08:28 PM, Suprateeka R Hegde wrote:
> So the ratio shows ~96% is RELATIVE reloc. And only ~4% others. This is
> not the case on HP-UX/Itanium. But as I said, this comparison does not
> make sense as the runtime architecture and ISA are totally different.
It could be that HP-UX was written in a way to reduce relative
relocations, or that the final executables aren't actually PIC anymore.
The amount of C++ code with large vtables could differ as well.
Here's a GCC extension proposed which is relevant to producing fully
relocatable code with fewer relative relocations:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38295
Florian
next prev parent reply other threads:[~2017-05-01 18:36 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CAGWvnynFwXFGLj3tAVgDatn0zmuHcWHyRNuDvR+wRZCXLnar_A@mail.gmail.com>
2017-01-01 0:00 ` Rafael Avila de Espindola
2017-01-01 0:00 ` David Edelsohn
2017-01-01 0:00 ` Suprateeka R Hegde
2017-01-01 0:00 ` Florian Weimer [this message]
2017-01-01 0:00 ` Suprateeka R Hegde
2017-01-01 0:00 ` Sriraman Tallam via gnu-gabi
2017-01-01 0:00 ` Rahul Chaudhry via gnu-gabi
2017-01-01 0:00 ` Cary Coutant
2017-01-01 0:00 ` Rahul Chaudhry via gnu-gabi
2017-01-01 0:00 ` Rahul Chaudhry via gnu-gabi
2017-01-01 0:00 ` Ian Lance Taylor via gnu-gabi
2017-01-01 0:00 ` Florian Weimer
2017-01-01 0:00 ` Sriraman Tallam via gnu-gabi
2017-01-01 0:00 ` Rahul Chaudhry via gnu-gabi
[not found] ` <CAORpzuMftCGpXUObOyoFY0=jorMBDWEDbQJ23DifTNW3v-WA6Q@mail.gmail.com>
2017-01-01 0:00 ` Rahul Chaudhry via gnu-gabi
2017-01-01 0:00 ` Cary Coutant
2017-01-01 0:00 ` Rahul Chaudhry via gnu-gabi
[not found] ` <CAORpzuPYsSBJtypm3NDcfcgRzos3WO4JjkvgiqpyBYBhoqLVFA@mail.gmail.com>
2018-01-01 0:00 ` Florian Weimer
2017-01-01 0:00 Sriraman Tallam
2017-01-01 0:00 ` Rafael Espíndola
2017-01-01 0:00 ` Sriraman Tallam
2017-01-01 0:00 ` Cary Coutant
2017-01-01 0:00 ` Sriraman Tallam
2017-01-01 0:00 ` H.J. Lu
2017-01-01 0:00 ` Florian Weimer
2017-01-01 0:00 ` Alan Modra
2017-01-01 0:00 ` Markus Trippelsdorf
2017-01-01 0:00 ` H.J. Lu
2017-01-01 0:00 ` Sriraman Tallam
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