From: "H. Peter Anvin" <hpa@zytor.com>
To: Roland McGrath <mcgrathr@google.com>
Cc: "H.J. Lu" <hjl.tools@gmail.com>,
Stefani Seibold <stefani@seibold.net>,
Andy Lutomirski <luto@amacapital.net>,
linux-kernel@vger.kernel.org, x86@kernel.org, tglx@linutronix.de,
mingo@redhat.com, ak@linux.intel.com, aarcange@redhat.com,
john.stultz@linaro.org, xemul@parallels.com, gorcunov@openvz.org,
andriy.shevchenko@linux.intel.com,
Linus Torvalds <torvalds@linux-foundation.org>,
jakub@redhat.com
Subject: Re: [PATCH 6/6] Add 32 bit VDSO support for 32 and 64 bit kernels
Date: Thu, 20 Dec 2012 10:40:59 -0800 [thread overview]
Message-ID: <50D35BBB.7020905@zytor.com> (raw)
In-Reply-To: <CAB=4xhpXojoeNdThEQi3CH_fhsAqk63_G5zYgMTvoPxn5nE7Zg@mail.gmail.com>
On 12/20/2012 10:35 AM, Roland McGrath wrote:
> The Kconfig text for COMPAT_VDSO suggests that glibc versions prior to
> 2.3.3 may have relied on the fixed address. I can't find anything in the
> libc revision history to explain that (AFAIK the code always used
> AT_SYSINFO* since it started using the vDSO at all), but it might have been
> something less obvious. Someone like Jakub might recall the details.
Jakub, any insights?
We're trying to figure out if anything ever depended on the COMPAT_VDSO
(at a fixed address), in particular for i386 (as opposed to x86-64).
-hpa
prev parent reply other threads:[~2012-12-20 18:41 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-18 9:40 [PATCH 0/6] Add 32 bit VDSO time function support stefani
2012-12-18 9:40 ` [PATCH 1/6] Move out seqcount from seqlock.h stefani
2012-12-18 9:40 ` [PATCH 2/6] Make vsyscall_gtod_data handling x86 generic stefani
2012-12-18 9:40 ` [PATCH 3/6] Make vsyscall_gtod_data compatible with 32 bit VDSO stefani
2012-12-18 9:40 ` [PATCH 4/6] Add new base function _install_special_mapping() to mmap.c stefani
2012-12-18 9:40 ` [PATCH 5/6] Cleanup header files to build a proper 32 bit VDSO stefani
2012-12-18 9:40 ` [PATCH 6/6] Add 32 bit VDSO support for 32 and 64 bit kernels stefani
2012-12-18 16:17 ` H. Peter Anvin
2012-12-18 16:52 ` Stefani Seibold
2012-12-18 18:44 ` H. Peter Anvin
2012-12-18 20:32 ` Stefani Seibold
2012-12-18 20:37 ` Andy Lutomirski
2012-12-18 22:24 ` H. Peter Anvin
2012-12-20 7:41 ` Stefani Seibold
2012-12-20 16:17 ` H. Peter Anvin
2012-12-20 17:53 ` Stefani Seibold
2012-12-20 18:21 ` H. Peter Anvin
2012-12-20 18:23 ` H.J. Lu
2012-12-20 18:35 ` Roland McGrath
2012-12-20 18:40 ` H. Peter Anvin [this message]
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