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Re: glibc 2.21 - Machine maintainers, please test your machines.
- From: Andreas Schwab <schwab at suse dot de>
- To: "H.J. Lu" <hjl dot tools at gmail dot com>
- Cc: Chris Metcalf <cmetcalf at ezchip dot com>, Torvald Riegel <triegel at redhat dot com>, "Carlos O'Donell" <carlos at redhat dot com>, GNU C Library <libc-alpha at sourceware dot org>, David Miller <davem at davemloft dot net>, Richard Henderson <rth at redhat dot com>, Mike Frysinger <vapier at gentoo dot org>, "Joseph S. Myers" <joseph at codesourcery dot com>, Kaz Kojima <kkojima at rr dot iij4u dot or dot jp>, Thomas Schwinge <thomas at codesourcery dot com>, Marcus Shawcroft <marcus dot shawcroft at linaro dot org>, Chung-Lin Tang <chunglin_tang at mentor dot com>, Adhemerval Zanella <azanella at linux dot vnet dot ibm dot com>, Andreas Krebbel <krebbel at linux dot vnet dot ibm dot com>
- Date: Mon, 26 Jan 2015 15:51:10 +0100
- Subject: Re: glibc 2.21 - Machine maintainers, please test your machines.
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"H.J. Lu" <hjl.tools@gmail.com> writes:
> On Mon, Jan 26, 2015 at 5:48 AM, Andreas Schwab <schwab@suse.de> wrote:
>> "H.J. Lu" <hjl.tools@gmail.com> writes:
>>
>>> On Mon, Jan 26, 2015 at 1:24 AM, Andreas Schwab <schwab@suse.de> wrote:
>>>> "H.J. Lu" <hjl.tools@gmail.com> writes:
>>>>
>>>>> It doesn't change the size, only increases alignment from 4 bytes to 8 bytes.
>>>>
>>>> Alignment is part of the ABI.
>>>>
>>>
>>> For x32, we can increase alignment from 4 bytes to 8 bytes without breaking
>>> existing binaries.
>>
>> The compiler may generate code to take advantage of the bigger
>> alignment, which will fail if not fulfilled (this is not just about
>> unaligned accesses).
>>
>
> Failure shouldn't happen on x32 in this case.
Which part of "this is not just about unaligned accesses" didn't you
understand?
Andreas.
--
Andreas Schwab, SUSE Labs, schwab@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."
- References:
- glibc 2.21 - Machine maintainers, please test your machines.
- Re: glibc 2.21 - Machine maintainers, please test your machines.
- Re: glibc 2.21 - Machine maintainers, please test your machines.
- Re: glibc 2.21 - Machine maintainers, please test your machines.
- Re: glibc 2.21 - Machine maintainers, please test your machines.
- Re: glibc 2.21 - Machine maintainers, please test your machines.
- Re: glibc 2.21 - Machine maintainers, please test your machines.
- Re: glibc 2.21 - Machine maintainers, please test your machines.
- Re: glibc 2.21 - Machine maintainers, please test your machines.
- Re: glibc 2.21 - Machine maintainers, please test your machines.
- Re: glibc 2.21 - Machine maintainers, please test your machines.
- Re: glibc 2.21 - Machine maintainers, please test your machines.
- Re: glibc 2.21 - Machine maintainers, please test your machines.