From: "H. Peter Anvin" <hpa@zytor.com>
To: Andy Lutomirski <luto@amacapital.net>,
Frederic Weisbecker <fweisbec@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>,
linux-arch <linux-arch@vger.kernel.org>, X86 ML <x86@kernel.org>,
LSM List <linux-security-module@vger.kernel.org>,
Linux MIPS Mailing List <linux-mips@linux-mips.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
Alexei Starovoitov <ast@plumgrid.com>,
Will Drewry <wad@chromium.org>, Kees Cook <keescook@chromium.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v4 0/5] x86: two-phase syscall tracing and seccomp fastpath
Date: Thu, 31 Jul 2014 09:56:48 -0700 [thread overview]
Message-ID: <53DA7550.40905@zytor.com> (raw)
In-Reply-To: <CALCETrUafpWfnbfZzgu3qSGqyxcG0+6A=A1RE8g++=GrQKD93Q@mail.gmail.com>
On 07/30/2014 10:25 AM, Andy Lutomirski wrote:
>
> And yet x86_64 has this code implemented in assembly even in the
> slowpath. Go figure.
>
There is way too much assembly in entry_64.S probably because things
have been grafted on, ahem, "organically". It is darn nigh impossible
to even remotely figure out what goes on in that file.
-hpa
WARNING: multiple messages have this Message-ID (diff)
From: hpa@zytor.com (H. Peter Anvin)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v4 0/5] x86: two-phase syscall tracing and seccomp fastpath
Date: Thu, 31 Jul 2014 09:56:48 -0700 [thread overview]
Message-ID: <53DA7550.40905@zytor.com> (raw)
In-Reply-To: <CALCETrUafpWfnbfZzgu3qSGqyxcG0+6A=A1RE8g++=GrQKD93Q@mail.gmail.com>
On 07/30/2014 10:25 AM, Andy Lutomirski wrote:
>
> And yet x86_64 has this code implemented in assembly even in the
> slowpath. Go figure.
>
There is way too much assembly in entry_64.S probably because things
have been grafted on, ahem, "organically". It is darn nigh impossible
to even remotely figure out what goes on in that file.
-hpa
next prev parent reply other threads:[~2014-07-31 16:56 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-29 3:38 [PATCH v4 0/5] x86: two-phase syscall tracing and seccomp fastpath Andy Lutomirski
2014-07-29 3:38 ` Andy Lutomirski
2014-07-29 3:38 ` [PATCH v4 1/5] x86,x32,audit: Fix x32's AUDIT_ARCH wrt audit Andy Lutomirski
2014-07-29 3:38 ` Andy Lutomirski
2014-07-29 3:38 ` [PATCH v4 2/5] x86,entry: Only call user_exit if TIF_NOHZ Andy Lutomirski
2014-07-29 3:38 ` Andy Lutomirski
2014-07-29 19:32 ` Oleg Nesterov
2014-07-29 19:32 ` Oleg Nesterov
2014-07-30 16:43 ` Frederic Weisbecker
2014-07-30 16:43 ` Frederic Weisbecker
2014-07-30 17:23 ` Andy Lutomirski
2014-07-30 17:23 ` Andy Lutomirski
2014-07-31 15:16 ` Frederic Weisbecker
2014-07-31 15:16 ` Frederic Weisbecker
2014-07-31 16:42 ` Oleg Nesterov
2014-07-31 16:42 ` Oleg Nesterov
2014-07-31 16:49 ` Frederic Weisbecker
2014-07-31 16:49 ` Frederic Weisbecker
2014-07-31 16:54 ` Oleg Nesterov
2014-07-31 16:54 ` Oleg Nesterov
2014-07-31 16:58 ` Oleg Nesterov
2014-07-31 16:58 ` Oleg Nesterov
2014-07-31 17:17 ` Frederic Weisbecker
2014-07-31 17:17 ` Frederic Weisbecker
2014-07-29 3:38 ` [PATCH v4 3/5] x86: Split syscall_trace_enter into two phases Andy Lutomirski
2014-07-29 3:38 ` Andy Lutomirski
2014-07-29 19:25 ` Oleg Nesterov
2014-07-29 19:25 ` Oleg Nesterov
2014-07-29 3:38 ` [PATCH v4 4/5] x86_64,entry: Treat regs->ax the same in fastpath and slowpath syscalls Andy Lutomirski
2014-07-29 3:38 ` [PATCH v4 4/5] x86_64, entry: " Andy Lutomirski
2014-07-29 3:38 ` [PATCH v4 5/5] x86_64,entry: Use split-phase syscall_trace_enter for 64-bit syscalls Andy Lutomirski
2014-07-29 3:38 ` [PATCH v4 5/5] x86_64, entry: " Andy Lutomirski
2014-07-29 19:20 ` [PATCH v4 0/5] x86: two-phase syscall tracing and seccomp fastpath Oleg Nesterov
2014-07-29 19:20 ` Oleg Nesterov
2014-07-29 20:54 ` Andy Lutomirski
2014-07-29 20:54 ` Andy Lutomirski
2014-07-29 23:30 ` Andy Lutomirski
2014-07-29 23:30 ` Andy Lutomirski
2014-07-30 15:32 ` Oleg Nesterov
2014-07-30 15:32 ` Oleg Nesterov
2014-07-30 16:59 ` Frederic Weisbecker
2014-07-30 16:59 ` Frederic Weisbecker
2014-07-30 17:25 ` Andy Lutomirski
2014-07-30 17:25 ` Andy Lutomirski
2014-07-31 16:56 ` H. Peter Anvin [this message]
2014-07-31 16:56 ` H. Peter Anvin
2014-07-31 17:20 ` Frederic Weisbecker
2014-07-31 17:20 ` Frederic Weisbecker
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