linux-kernel - Re: [PATCH] x86/asm/entry/32: Rename labels in INT 0x80 code path

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

Message-ID: <CAMzpN2hCMa2MHkDkPQiVf3_LuBFmYs3cxM_osM0wdbL5+i+ttg@mail.gmail.com>
Date:	Mon, 8 Jun 2015 10:47:10 -0400
From:	Brian Gerst <brgerst@...il.com>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Denys Vlasenko <dvlasenk@...hat.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Kees Cook <keescook@...omium.org>,
	Borislav Petkov <bp@...en8.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Alexei Starovoitov <ast@...mgrid.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Will Drewry <wad@...omium.org>,
	Andy Lutomirski <luto@...capital.net>,
	Steven Rostedt <rostedt@...dmis.org>,
	"the arch/x86 maintainers" <x86@...nel.org>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH] x86/asm/entry/32: Rename labels in INT 0x80 code path

On Mon, Jun 8, 2015 at 1:35 AM, Ingo Molnar <mingo@...nel.org> wrote:
>
> * Linus Torvalds <torvalds@...ux-foundation.org> wrote:
>
>> On Jun 7, 2015 11:42 AM, "Denys Vlasenko" <dvlasenk@...hat.com> wrote:
>> >
>> > Rename it to ia32_int80_target.
>>
>> Btw, could we arrive to get rid of the idiotic "ia32" naming too? It's wrong,
>> and it harkens back to the days when intel thought itanium makes sense and
>> wanted to talk about "intel architecture".
>
> Absolutely, I've been slowly eliminating uses of it - that naming is very
> annoying.
>
> Another thing I'm doing is to slowly remove references to 'emulation' - we don't
> emulate 32-bit in any way, we implement various 32-bit syscall ABIs (old a new)
> natively.
>
> I'd like to remove CONFIG_IA32_EMULATION from the .config as well - it offers
> nothing real over CONFIG_COMPAT.

A few months ago I started working on a set of patches to decouple the
X32 support from the 32-bit compat support.  There is actually quite a
bit of non-shared code between the two, mainly signal handling and
syscall entries.  The code used by both should be CONFIG_COMPAT, but
separate config defines should be kept for the non-shared code.  That
would allow X32 support without dragging in all of the 32-bit compat
support.  I never finished it because I couldn't find a current
distribution that supported X32 out of the box to test with.

I agree on dropping the word emulation though, since the hardware
provides a full 32-bit environment.  I suggest CONFIG_X86_32_COMPAT
(or CONFIG_COMPAT_X86_32) as a new name.

--
Brian Gerst
--
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/