From: Paul Brook <paul@codesourcery.com>
To: qemu-devel@nongnu.org
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
Subject: Re: [Qemu-devel] [PATCH v2] Build *-user targets as PIE
Date: Thu, 3 Sep 2009 15:38:19 +0100 [thread overview]
Message-ID: <200909031538.19806.paul@codesourcery.com> (raw)
In-Reply-To: <cc557aab0909030721o3623ab3bhb92a51c72195454d@mail.gmail.com>
> PIE code usually is a bit slower. Approximately, 1% for i386 according to
> some tests. RISC architectures should be affected less, since they have
> more registers. On other hand we are getting rid from text relocations on
> i386 which make executable loading slower. So...
I think you've got that backwards.
A traditional (fixed address) executable requires no load-time relocation for
internal references because all addresses are known at static link time. PIE
require the dynamic linker adjust all absolute addresses.
Paul
next prev parent reply other threads:[~2009-09-03 14:38 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-02 15:21 [Qemu-devel] [PATCH 1/2] Do not link *-user target with libhw*.a Kirill A. Shutemov
2009-09-02 15:21 ` [Qemu-devel] [PATCH 2/2] Build *-user targets as PIE Kirill A. Shutemov
2009-09-02 14:24 ` [Qemu-devel] " Paolo Bonzini
2009-09-02 14:35 ` Kirill A. Shutemov
2009-09-02 15:46 ` [Qemu-devel] " Arnaud Patard
2009-09-02 15:52 ` Kirill A. Shutemov
2009-09-02 16:03 ` Arnaud Patard
2009-09-03 12:15 ` [Qemu-devel] [PATCH v2] " Kirill A. Shutemov
2009-09-03 12:00 ` Reimar Döffinger
2009-09-03 14:21 ` Kirill A. Shutemov
2009-09-03 14:38 ` Paul Brook [this message]
2009-09-03 14:52 ` [Qemu-devel] " Paolo Bonzini
2009-09-03 15:07 ` [Qemu-devel] " Kirill A. Shutemov
2009-09-03 17:17 ` Reimar Döffinger
2009-09-04 4:33 ` Kirill A. Shutemov
2009-09-04 7:51 ` Reimar Döffinger
2009-09-04 8:03 ` Kirill A. Shutemov
[not found] ` <m3ws4g9qqe.fsf@neno.mitica>
2009-09-03 12:51 ` [Qemu-devel] " Kirill A. Shutemov
2009-09-03 14:39 ` [Qemu-devel] " Paul Brook
2009-09-03 15:08 ` Kirill A. Shutemov
2009-09-02 18:54 ` [Qemu-devel] [PATCH 2/2] " Riku Voipio
[not found] ` <m3iqg1ckts.fsf@neno.mitica>
2009-09-02 18:59 ` [Qemu-devel] " Kirill A. Shutemov
-- strict thread matches above, loose matches on Subject: below --
2009-09-03 18:36 [Qemu-devel] [PATCH v2] " Kirill A. Shutemov
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