From: "H. Peter Anvin" <hpa@zytor.com>
To: Will Drewry <wad@chromium.org>
Cc: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
linux-doc@vger.kernel.org, kernel-hardening@lists.openwall.com,
netdev@vger.kernel.org, x86@kernel.org, arnd@arndb.de,
davem@davemloft.net, mingo@redhat.com, oleg@redhat.com,
peterz@infradead.org, rdunlap@xenotime.net,
mcgrathr@chromium.org, tglx@linutronix.de, luto@mit.edu,
eparis@redhat.com, serge.hallyn@canonical.com, djm@mindrot.org,
scarybeasts@gmail.com, indan@nul.nu, pmoore@redhat.com,
akpm@linux-foundation.org, corbet@lwn.net,
eric.dumazet@gmail.com, markus@chromium.org,
coreyb@linux.vnet.ibm.com, keescook@chromium.org
Subject: [kernel-hardening] Re: [PATCH v15 04/13] arch/x86: add syscall_get_arch to syscall.h
Date: Tue, 10 Apr 2012 20:16:24 -0700 [thread overview]
Message-ID: <4F84F788.3020702@zytor.com> (raw)
In-Reply-To: <CABqD9hZgnrKFY_Wei-ysU=Dy7Og2iEemnqPvcQ14M0+vL65gHQ@mail.gmail.com>
On 04/10/2012 08:13 PM, Will Drewry wrote:
>
> Now that I've seen is_ia32_task(), it appears to be exactly the same as above:
> (1) If we're x86_32, it's ia32
> (2) If we're x86_64, ia32 == !!(status & TS_COMPAT)
> (3) Otherwise, it's x86_64, including x32
>
> Am I missing something? Should is_ia32_task(void) take a task_struct?
> Right now, I don't see any reason to change the code, as posted, but
> maybe I am mis-reading?
>
is_compat_task() is true for x32, is_ia32_task() is false.
-hpa
WARNING: multiple messages have this Message-ID (diff)
From: "H. Peter Anvin" <hpa@zytor.com>
To: Will Drewry <wad@chromium.org>
Cc: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
linux-doc@vger.kernel.org, kernel-hardening@lists.openwall.com,
netdev@vger.kernel.org, x86@kernel.org, arnd@arndb.de,
davem@davemloft.net, mingo@redhat.com, oleg@redhat.com,
peterz@infradead.org, rdunlap@xenotime.net,
mcgrathr@chromium.org, tglx@linutronix.de, luto@mit.edu,
eparis@redhat.com, serge.hallyn@canonical.com, djm@mindrot.org,
scarybeasts@gmail.com, indan@nul.nu, pmoore@redhat.com,
akpm@linux-foundation.org, corbet@lwn.net,
eric.dumazet@gmail.com, markus@chromium.org,
coreyb@linux.vnet.ibm.com, keescook@chromium.org
Subject: Re: [PATCH v15 04/13] arch/x86: add syscall_get_arch to syscall.h
Date: Tue, 10 Apr 2012 20:16:24 -0700 [thread overview]
Message-ID: <4F84F788.3020702@zytor.com> (raw)
In-Reply-To: <CABqD9hZgnrKFY_Wei-ysU=Dy7Og2iEemnqPvcQ14M0+vL65gHQ@mail.gmail.com>
On 04/10/2012 08:13 PM, Will Drewry wrote:
>
> Now that I've seen is_ia32_task(), it appears to be exactly the same as above:
> (1) If we're x86_32, it's ia32
> (2) If we're x86_64, ia32 == !!(status & TS_COMPAT)
> (3) Otherwise, it's x86_64, including x32
>
> Am I missing something? Should is_ia32_task(void) take a task_struct?
> Right now, I don't see any reason to change the code, as posted, but
> maybe I am mis-reading?
>
is_compat_task() is true for x32, is_ia32_task() is false.
-hpa
next prev parent reply other threads:[~2012-04-11 3:16 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-15 3:11 [kernel-hardening] [PATCH v15 00/13] seccomp_filter: syscall filtering using BPF Will Drewry
2012-03-15 3:11 ` Will Drewry
2012-03-15 3:11 ` [kernel-hardening] [PATCH v15 01/13] sk_run_filter: add BPF_S_ANC_SECCOMP_LD_W Will Drewry
2012-03-15 3:11 ` Will Drewry
2012-03-16 18:15 ` [kernel-hardening] " Eric Dumazet
2012-03-16 18:15 ` Eric Dumazet
2012-03-15 3:11 ` [kernel-hardening] [PATCH v15 02/13] net/compat.c,linux/filter.h: share compat_sock_fprog Will Drewry
2012-03-15 3:11 ` Will Drewry
2012-03-16 18:16 ` [kernel-hardening] " Eric Dumazet
2012-03-16 18:16 ` Eric Dumazet
2012-03-16 19:23 ` [kernel-hardening] " Will Drewry
2012-03-16 19:23 ` Will Drewry
2012-03-15 3:11 ` [kernel-hardening] [PATCH v15 03/13] seccomp: kill the seccomp_t typedef Will Drewry
2012-03-15 3:11 ` Will Drewry
2012-03-15 3:11 ` [kernel-hardening] [PATCH v15 04/13] arch/x86: add syscall_get_arch to syscall.h Will Drewry
2012-03-15 3:11 ` Will Drewry
2012-03-25 19:34 ` [kernel-hardening] " H. Peter Anvin
2012-03-25 19:34 ` H. Peter Anvin
2012-04-11 3:13 ` [kernel-hardening] " Will Drewry
2012-04-11 3:13 ` Will Drewry
2012-04-11 3:16 ` H. Peter Anvin [this message]
2012-04-11 3:16 ` H. Peter Anvin
2012-04-11 3:20 ` [kernel-hardening] " H. Peter Anvin
2012-04-11 3:20 ` H. Peter Anvin
2012-04-11 15:41 ` [kernel-hardening] " Will Drewry
2012-04-11 15:41 ` Will Drewry
2012-03-15 3:11 ` [kernel-hardening] [PATCH v15 05/13] asm/syscall.h: add syscall_get_arch Will Drewry
2012-03-15 3:11 ` Will Drewry
2012-03-15 3:11 ` [kernel-hardening] [PATCH v15 06/13] seccomp: add system call filtering using BPF Will Drewry
2012-03-15 3:11 ` Will Drewry
2012-03-25 7:31 ` [kernel-hardening] " Vladimir Murzin
2012-03-25 7:31 ` Vladimir Murzin
2012-03-15 3:11 ` [kernel-hardening] [PATCH v15 07/13] seccomp: remove duplicated failure logging Will Drewry
2012-03-15 3:11 ` Will Drewry
2012-03-15 3:12 ` [kernel-hardening] [PATCH v15 08/13] seccomp: add SECCOMP_RET_ERRNO Will Drewry
2012-03-15 3:12 ` Will Drewry
2012-03-15 3:12 ` [kernel-hardening] [PATCH v15 09/13] signal, x86: add SIGSYS info and make it synchronous Will Drewry
2012-03-15 3:12 ` Will Drewry
2012-03-15 3:12 ` [kernel-hardening] [PATCH v15 10/13] seccomp: Add SECCOMP_RET_TRAP Will Drewry
2012-03-15 3:12 ` Will Drewry
2012-03-15 3:12 ` [kernel-hardening] [PATCH v15 11/13] ptrace,seccomp: Add PTRACE_SECCOMP support Will Drewry
2012-03-15 3:12 ` Will Drewry
2012-03-15 4:49 ` [kernel-hardening] " Indan Zupancic
2012-03-15 4:49 ` Indan Zupancic
2012-03-15 4:49 ` Indan Zupancic
2012-03-15 4:49 ` Indan Zupancic
2012-03-15 14:40 ` [kernel-hardening] " Will Drewry
2012-03-15 14:40 ` Will Drewry
2012-03-15 3:12 ` [kernel-hardening] [PATCH v15 12/13] x86: Enable HAVE_ARCH_SECCOMP_FILTER Will Drewry
2012-03-15 3:12 ` Will Drewry
2012-03-15 3:12 ` [kernel-hardening] [PATCH v15 13/13] Documentation: prctl/seccomp_filter Will Drewry
2012-03-15 3:12 ` Will Drewry
2012-03-25 19:36 ` [kernel-hardening] Re: [PATCH v15 00/13] seccomp_filter: syscall filtering using BPF H. Peter Anvin
2012-03-25 19:36 ` H. Peter Anvin
2012-03-26 16:53 ` [kernel-hardening] " Will Drewry
2012-03-26 16:53 ` Will Drewry
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