linux-kernel - On what archs are PROT_READ and PROT

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <5be025980804082359i125deasfd2e34a3c51f8524@mail.gmail.com>
Date:	Wed, 9 Apr 2008 02:59:18 -0400
From:	"Wei Hu" <glegoo@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: On what archs are PROT_READ and PROT_EXEC independent?

Hello,

I know that newer Intel and AMD CPUs support readable and
non-executable pages. But from my tests, if I use mprotect() to set a
page's permission to be PROT_EXEC, that page is still readable. I'm
wondering what architectures implement these flags independently? Is
it possible to get executable and non-readable pages?

Thanks,
Wei
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/