From: Jakub Jelinek <jakub@redhat.com>
To: Arijit Das <Arijit.Das@synopsys.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Shared library holes in x86_64
Date: Mon, 3 Oct 2005 03:18:13 -0400 [thread overview]
Message-ID: <20051003071813.GI8983@devserv.devel.redhat.com> (raw)
In-Reply-To: <7EC22963812B4F40AE780CF2F140AFE916835A@IN01WEMBX1.internal.synopsys.com>
On Mon, Oct 03, 2005 at 12:00:05PM +0530, Arijit Das wrote:
> If I strace a "/bin/sleep 23" command in a RHAS3.0/x86-AMD64 machine, I
> see that holes are being created in some of the mapped shared libraries
> using the mprotect system call like this:
I explained it 3 days ago, so once again:
x86-64 binaries and shared libraries are required to handle page sizes up
to 1MB and as RE and RW segments can't be on the same page, this means they
must not share the same 1MB page.
Just google for ELF_MAXPAGESIZE or look at the libraries using readelf -Wl.
Jakub
next parent reply other threads:[~2005-10-03 7:18 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <7EC22963812B4F40AE780CF2F140AFE916835A@IN01WEMBX1.internal.synopsys.com>
2005-10-03 7:18 ` Jakub Jelinek [this message]
2005-10-03 7:27 Shared library holes in x86_64 Arijit Das
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