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Subject: Re: [PATCH 26/26] x86, pkeys: Documentation
References: <20150916174903.E112E464@viggo.jf.intel.com>
 <20150916174913.AF5FEA6D@viggo.jf.intel.com>
 <20150920085554.GA21906@gmail.com> <55FF88BA.6080006@sr71.net>
 <20150924094956.GA30349@gmail.com> <56044A88.7030203@sr71.net>
 <20151001111718.GA25333@gmail.com>
 <CAGXu5j+j92EPEwv9O4cX92zJDTyBEz3WtQ2CDHT0KmqJ6bCmGQ@mail.gmail.com>
 <560DB4A6.6050107@sr71.net>
 <CA+55aFwUAY01QC8A3mCOoq5aYjT7Lw-gVx6DvqYBr0UMZ9kZEQ@mail.gmail.com>
From: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <560E6F5C.4040302@redhat.com>
Date: Fri, 2 Oct 2015 13:49:48 +0200
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To: Linus Torvalds <torvalds@linux-foundation.org>, Dave Hansen <dave@sr71.net>
Cc: Kees Cook <keescook@google.com>, Ingo Molnar <mingo@kernel.org>, "x86@kernel.org" <x86@kernel.org>, LKML <linux-kernel@vger.kernel.org>, Linux-MM <linux-mm@kvack.org>, Andrew Morton <akpm@linux-foundation.org>, Peter Zijlstra <a.p.zijlstra@chello.nl>, Andy Lutomirski <luto@kernel.org>, Borislav Petkov <bp@alien8.de>



On 02/10/2015 00:48, Linus Torvalds wrote:
> It's quite likely that you will find that compilers put read-only
> constants in the text section, knowing that executable means readable.

Not on x86 (because it has large immediates; RISC machines and s390 do
put large constants in the text section).

But at the very least jump tables reside in the .text seection.

Paolo

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