From: Rich Felker <dalias@libc.org>
To: musl@lists.openwall.com
Subject: Re: max_align_t mess on i386
Date: Mon, 16 Dec 2019 12:51:24 -0500 [thread overview]
Message-ID: <20191216175124.GF1666@brightrain.aerifal.cx> (raw)
In-Reply-To: <87h82017q6.fsf@mid.deneb.enyo.de>
On Mon, Dec 16, 2019 at 06:49:21PM +0100, Florian Weimer wrote:
> * Rich Felker:
>
> > The latter looks buggy. It's clearly supposed to be in bits, not
> > bytes, with some archs defining it as 64 or 128 and:
> >
> > gcc/defaults.h:#ifndef MALLOC_ABI_ALIGNMENT
> > gcc/defaults.h:#define MALLOC_ABI_ALIGNMENT BITS_PER_WORD
> >
> > However arm has:
> >
> > gcc/config/arm/arm.h:#define MALLOC_ABI_ALIGNMENT BIGGEST_ALIGNMENT
> >
> > which is in bytes...
>
> The target hook is in bits. The macro synthesized from that is in
> bytes:
>
> cpp_define_formatted (pfile, "__BIGGEST_ALIGNMENT__=%d",
> BIGGEST_ALIGNMENT / BITS_PER_UNIT);
Ah, that explains it. So no bug. Thanks.
Rich
next prev parent reply other threads:[~2019-12-16 17:51 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-14 15:19 Rich Felker
2019-12-14 17:51 ` Florian Weimer
2019-12-14 18:17 ` Rich Felker
2019-12-14 18:53 ` Daniel Kolesa
2019-12-15 18:04 ` Rich Felker
2019-12-15 5:47 ` Markus Wichmann
2019-12-15 18:06 ` Jeffrey Walton
2019-12-15 18:22 ` Rich Felker
2019-12-16 15:30 ` Jeffrey Walton
2019-12-16 15:56 ` Rich Felker
2019-12-16 16:36 ` Jeffrey Walton
2019-12-16 17:49 ` Rich Felker
2019-12-16 16:40 ` Florian Weimer
2019-12-16 17:45 ` Rich Felker
2019-12-16 17:49 ` Florian Weimer
2019-12-16 17:51 ` Rich Felker [this message]
2019-12-15 18:23 ` Joakim Sindholt
2019-12-15 18:51 ` Rich Felker
2019-12-15 20:03 ` Alexander Monakov
2019-12-15 20:50 ` Szabolcs Nagy
2019-12-15 21:51 ` Jeffrey Walton
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