From: David Mosberger <davidm@napali.hpl.hp.com>
To: Kurt Garloff <garloff@suse.de>
Cc: Andrew Morton <akpm@osdl.org>,
linux-kernel@vger.kernel.org, mingo@redhat.com
Subject: Re: Non-Exec stack patches
Date: Tue, 23 Mar 2004 16:38:50 -0800 [thread overview]
Message-ID: <16480.55450.730214.175997@napali.hpl.hp.com> (raw)
In-Reply-To: <20040324002149.GT4677@tpkurt.garloff.de>
>>>>> On Wed, 24 Mar 2004 01:21:49 +0100, Kurt Garloff <garloff@suse.de> said:
>> Which architectures are currently making their pre-page execute
>> permissions depend upon VM_EXEC? Would additional arch patches
>> be needed for this?
Kurt> It works on AMD64 (not ia32e), both for 64bit and 32bit
Kurt> binaries. I have not yet tested other archs.
IA64 Linux had non-executable stack/data before PT_GNU_STACK was invented.
It's keyed off a ELF header flags bit:
/* Least-significant four bits of ELF header's e_flags are
OS-specific. The bits are interpreted as follows by Linux: */
#define EF_IA_64_LINUX_EXECUTABLE_STACK 0x1
I guess I never quiet understood why an entire program header is
needed for this, but that's just me.
--david
next prev parent reply other threads:[~2004-03-24 0:39 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-23 23:12 Kurt Garloff
2004-03-23 23:22 ` Ingo Molnar
2004-03-23 23:49 ` Andrew Morton
2004-03-24 0:21 ` Kurt Garloff
2004-03-24 0:38 ` David Mosberger [this message]
2004-03-24 1:20 ` Ulrich Drepper
2004-03-24 1:41 ` David Mosberger
2004-03-24 2:01 ` Ulrich Drepper
2004-03-24 7:09 ` David Mosberger
2004-03-24 7:00 ` Jakub Jelinek
2004-03-24 7:16 ` David Mosberger
2004-03-24 7:28 ` Jakub Jelinek
2004-03-24 7:45 ` David Mosberger
2004-03-24 16:29 ` John Reiser
2004-03-24 17:12 ` David Mosberger
2004-03-24 17:24 ` Jakub Jelinek
2004-03-24 18:01 ` David Mosberger
2004-03-24 19:02 ` John Reiser
2004-03-24 19:18 ` David Mosberger
2004-03-24 0:41 ` Andrew Morton
2004-03-24 0:41 ` Ingo Molnar
2004-03-24 10:53 ` Kurt Garloff
[not found] <1D3lO-3dh-13@gated-at.bofh.it>
[not found] ` <1D3YZ-3Gl-1@gated-at.bofh.it>
2004-03-24 6:01 ` Andi Kleen
2004-03-24 10:23 ` Stefan Smietanowski
2004-03-24 11:27 ` Andi Kleen
2004-03-24 22:03 ` Kurt Garloff
[not found] <20040324002149.GT4677@tpkurt.garloff.de.suse.lists.linux.kernel>
[not found] ` <16480.55450.730214.175997@napali.hpl.hp.com.suse.lists.linux.kernel>
[not found] ` <4060E24C.9000507@redhat.com.suse.lists.linux.kernel>
[not found] ` <16480.59229.808025.231875@napali.hpl.hp.com.suse.lists.linux.kernel>
[not found] ` <20040324070020.GI31589@devserv.devel.redhat.com.suse.lists.linux.kernel>
[not found] ` <16481.13780.673796.20976@napali.hpl.hp.com.suse.lists.linux.kernel>
[not found] ` <20040324072840.GK31589@devserv.devel.redhat.com.suse.lists.linux.kernel>
[not found] ` <16481.15493.591464.867776@napali.hpl.hp.com.suse.lists.linux.kernel>
[not found] ` <4061B764.5070008@BitWagon.com.suse.lists.linux.kernel>
[not found] ` <16481.49534.124281.434663@napali.hpl.hp.com.suse.lists.linux.kernel>
[not found] ` <20040324172454.GP31589@devserv.devel.redhat.com.suse.lists.linux.kernel>
2004-03-24 17:49 ` Andi Kleen
2004-03-24 17:54 ` Jakub Jelinek
2004-04-14 7:28 Siddha, Suresh B
2004-04-14 8:23 ` Jamie Lokier
2004-04-14 9:47 ` Jamie Lokier
2004-04-14 18:30 ` Kurt Garloff
2004-04-14 20:54 ` Jeff Dike
2004-04-14 8:45 Siddha, Suresh B
2004-04-14 9:38 ` Jamie Lokier
2004-04-14 19:14 Siddha, Suresh B
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