From: "Dmitry V. Levin" <ldv@altlinux.org>
To: ALT Linux Team development discussions <devel@lists.altlinux.org>
Subject: Re: [devel] PIE Executables
Date: Sat, 31 May 2008 02:53:18 +0400
Message-ID: <20080530225318.GB11322@wo.int.altlinux.org> (raw)
In-Reply-To: <20080522071403.GA6179@localhost.localdomain>
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On Thu, May 22, 2008 at 10:14:05AM +0300, Kirill A. Shutemov wrote:
> On Thu, May 22, 2008 at 09:50:27AM +0300, Led wrote:
> > Thursday, 22 May 2008 08:02:03 Kirill A. Shutemov написав:
[...]
> > > Эвристику ломает преждеверменный strip. Опция -s при линковке удаляет
> > > символ __preinit_array_end по которому shared library отделяется от
> > > position independed executable.
> >
> > Точно! Спасибо!
> > Надо бы это где-то задокументировать. Потому как ИМХО неочевидно, что strip
> > при сборке у нас, получается, недопустим :(
>
> Я считаю, что это слабость эвристики. Нужно что-то делать.
Дело в том, что pic и pie объекты действительно слабо отличаются,
см. напр. diff -u /usr/lib/ldscripts/elf_i386.x{s,d}
Единственное, что можно попробовать, это проверку порядка секций,
у pie objects .interp должна быть первой.
--
ldv
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next prev parent reply other threads:[~2008-05-30 22:53 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-21 18:02 Led
2008-05-21 18:16 ` Led
2008-05-21 18:24 ` Andrey Rahmatullin
2008-05-21 19:21 ` Kirill A. Shutemov
2008-05-21 20:44 ` Led
2008-05-21 21:49 ` Dmitry V. Levin
2008-05-21 22:06 ` Led
2008-05-21 22:34 ` Led
2008-05-21 23:41 ` Dmitry V. Levin
2008-05-22 0:04 ` Led
2008-05-22 5:02 ` Kirill A. Shutemov
2008-05-22 6:50 ` Led
2008-05-22 7:14 ` Kirill A. Shutemov
2008-05-22 8:15 ` [devel] [JT] " Andrey Rahmatullin
2008-05-30 22:53 ` Dmitry V. Levin [this message]
2008-05-31 8:54 ` [devel] " Kirill A. Shutemov
2008-05-31 10:47 ` Dmitry V. Levin
2008-05-30 22:47 ` Dmitry V. Levin
2008-05-30 23:00 ` Led
2008-05-30 23:05 ` Dmitry V. Levin
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