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Re: [PATCH][BZ 18960] setlocale.c: Mark *_used symbols as unaligned.
- From: Florian Weimer <fweimer at redhat dot com>
- To: Rich Felker <dalias at libc dot org>, Marcin KoÅcielnicki <koriakin at 0x04 dot net>
- Cc: libc-alpha at sourceware dot org
- Date: Mon, 28 Sep 2015 16:52:10 +0200
- Subject: Re: [PATCH][BZ 18960] setlocale.c: Mark *_used symbols as unaligned.
- Authentication-results: sourceware.org; auth=none
- References: <1443360385-20079-1-git-send-email-koriakin at 0x04 dot net> <20150928141824 dot GX17773 at brightrain dot aerifal dot cx>
On 09/28/2015 04:18 PM, Rich Felker wrote:
> Can you explain how/why you think this is needed? char has no
> alignment requirements (inherently) so as far as I can tell, the
> compiler may not make any alignment assumptions about an extern object
> of type char.
s390(x) expects all top-level objects in the data segment to be aligned
to at least 2. As far as I can tell, this is not explicitly mentioned
in the psABI supplement, but it is heavily implied by .align directives
and use of the lalr instruction.
--
Florian Weimer / Red Hat Product Security