From: catalin.marinas@arm.com (Catalin Marinas)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v5 3/3] arm64: Add seccomp support
Date: Thu, 24 Jul 2014 16:16:28 +0100 [thread overview]
Message-ID: <20140724151628.GH13371@arm.com> (raw)
In-Reply-To: <CALCETrWTDS7VSyuR5wgGxpu-_YMWVUVmv9ht6t1tCSX=GA46cQ@mail.gmail.com>
On Thu, Jul 24, 2014 at 04:00:03PM +0100, Andy Lutomirski wrote:
> On Jul 23, 2014 10:40 PM, "AKASHI Takahiro" <takahiro.akashi@linaro.org> wrote:
> > when I implemented audit for arm64, the assumptions were
> > * If userspace is LE, then the kernel is also LE and if BE, then the kernel is BE.
> > * the syscall numbers and how arguments are encoded are the same btw BE and LE.
> > So syscall_get_arch() always return the same value.
>
> If arm64 ever adds support for mixed-endian userspace, this could
> become awkward. Hmm.
I really doubt we would ever support mixed endian user space. Too many
problems with translating syscalls, futexes (someone looked into this
and gave up eventually).
--
Catalin
WARNING: multiple messages have this Message-ID (diff)
From: Catalin Marinas <catalin.marinas@arm.com>
To: Andy Lutomirski <luto@amacapital.net>
Cc: AKASHI Takahiro <takahiro.akashi@linaro.org>,
Deepak Saxena <dsaxena@linaro.org>,
Will Drewry <wad@chromium.org>, Kees Cook <keescook@chromium.org>,
"linaro-kernel@lists.linaro.org" <linaro-kernel@lists.linaro.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
Will Deacon <Will.Deacon@arm.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v5 3/3] arm64: Add seccomp support
Date: Thu, 24 Jul 2014 16:16:28 +0100 [thread overview]
Message-ID: <20140724151628.GH13371@arm.com> (raw)
In-Reply-To: <CALCETrWTDS7VSyuR5wgGxpu-_YMWVUVmv9ht6t1tCSX=GA46cQ@mail.gmail.com>
On Thu, Jul 24, 2014 at 04:00:03PM +0100, Andy Lutomirski wrote:
> On Jul 23, 2014 10:40 PM, "AKASHI Takahiro" <takahiro.akashi@linaro.org> wrote:
> > when I implemented audit for arm64, the assumptions were
> > * If userspace is LE, then the kernel is also LE and if BE, then the kernel is BE.
> > * the syscall numbers and how arguments are encoded are the same btw BE and LE.
> > So syscall_get_arch() always return the same value.
>
> If arm64 ever adds support for mixed-endian userspace, this could
> become awkward. Hmm.
I really doubt we would ever support mixed endian user space. Too many
problems with translating syscalls, futexes (someone looked into this
and gave up eventually).
--
Catalin
next prev parent reply other threads:[~2014-07-24 15:16 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-22 9:14 [PATCH v5 0/3] arm64: Add seccomp support AKASHI Takahiro
2014-07-22 9:14 ` AKASHI Takahiro
2014-07-22 9:14 ` [PATCH v5 1/3] arm64: ptrace: reload a syscall number after ptrace operations AKASHI Takahiro
2014-07-22 9:14 ` AKASHI Takahiro
2014-07-22 20:15 ` Kees Cook
2014-07-22 20:15 ` Kees Cook
2014-07-23 7:03 ` AKASHI Takahiro
2014-07-23 7:03 ` AKASHI Takahiro
2014-07-23 8:25 ` Will Deacon
2014-07-23 8:25 ` Will Deacon
2014-07-23 9:09 ` AKASHI Takahiro
2014-07-23 9:09 ` AKASHI Takahiro
2014-07-23 15:13 ` Kees Cook
2014-07-23 15:13 ` Kees Cook
2014-07-24 3:54 ` Andy Lutomirski
2014-07-24 3:54 ` Andy Lutomirski
2014-07-24 5:57 ` AKASHI Takahiro
2014-07-24 5:57 ` AKASHI Takahiro
2014-07-24 15:01 ` Andy Lutomirski
2014-07-24 15:01 ` Andy Lutomirski
2014-07-25 10:36 ` AKASHI Takahiro
2014-07-25 10:36 ` AKASHI Takahiro
2014-07-25 11:03 ` Will Deacon
2014-07-25 11:03 ` Will Deacon
2014-07-29 6:49 ` AKASHI Takahiro
2014-07-29 6:49 ` AKASHI Takahiro
2014-07-29 13:26 ` Will Deacon
2014-07-29 13:26 ` Will Deacon
2014-07-22 9:14 ` [PATCH v5 2/3] asm-generic: Add generic seccomp.h for secure computing mode 1 AKASHI Takahiro
2014-07-22 9:14 ` AKASHI Takahiro
2014-07-24 3:40 ` Andy Lutomirski
2014-07-24 3:40 ` Andy Lutomirski
2014-07-24 4:41 ` Kees Cook
2014-07-24 4:41 ` Kees Cook
2014-07-24 5:17 ` AKASHI Takahiro
2014-07-24 5:17 ` AKASHI Takahiro
2014-07-24 14:57 ` Andy Lutomirski
2014-07-24 14:57 ` Andy Lutomirski
2014-07-25 8:52 ` AKASHI Takahiro
2014-07-25 8:52 ` AKASHI Takahiro
2014-07-22 9:14 ` [PATCH v5 3/3] arm64: Add seccomp support AKASHI Takahiro
2014-07-22 9:14 ` AKASHI Takahiro
2014-07-24 3:52 ` Andy Lutomirski
2014-07-24 3:52 ` Andy Lutomirski
2014-07-24 5:40 ` AKASHI Takahiro
2014-07-24 5:40 ` AKASHI Takahiro
2014-07-24 15:00 ` Andy Lutomirski
2014-07-24 15:00 ` Andy Lutomirski
2014-07-24 15:16 ` Catalin Marinas [this message]
2014-07-24 15:16 ` Catalin Marinas
2014-07-25 9:37 ` AKASHI Takahiro
2014-07-25 9:37 ` AKASHI Takahiro
2014-08-05 15:08 ` Kees Cook
2014-08-05 15:08 ` Kees Cook
2014-08-08 7:35 ` AKASHI Takahiro
2014-08-08 7:35 ` AKASHI Takahiro
2014-08-11 9:24 ` Will Deacon
2014-08-11 9:24 ` Will Deacon
2014-08-12 6:57 ` AKASHI Takahiro
2014-08-12 6:57 ` AKASHI Takahiro
2014-08-12 9:40 ` Will Deacon
2014-08-12 9:40 ` Will Deacon
2014-08-12 11:17 ` AKASHI Takahiro
2014-08-12 11:17 ` AKASHI Takahiro
2014-08-15 14:33 ` Will Deacon
2014-08-15 14:33 ` Will Deacon
2014-07-22 20:16 ` [PATCH v5 0/3] " Kees Cook
2014-07-22 20:16 ` Kees Cook
2014-07-23 7:09 ` AKASHI Takahiro
2014-07-23 7:09 ` AKASHI Takahiro
2014-07-23 15:36 ` Kees Cook
2014-07-23 15:36 ` Kees Cook
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