From: boris brezillon <b.brezillon.musl@gmail.com>
To: musl@lists.openwall.com
Subject: Re: TLS (thread-local storage) support
Date: Wed, 17 Oct 2012 03:03:39 +0200 [thread overview]
Message-ID: <CAKAk8dYOthFhSQ-Krb8y5xuex+xOwkb=LGdSHDncQhe_XsMtGQ@mail.gmail.com> (raw)
In-Reply-To: <20121017004253.GW254@brightrain.aerifal.cx>
2012/10/17 Rich Felker <dalias@aerifal.cx>:
> On Wed, Oct 17, 2012 at 02:08:11AM +0200, boris brezillon wrote:
>> >> I agree. This should be made optional. But if we don't compile libc
>> >> with fsplit-stack (-fnosplit-stack).
>> >> Each call to a libc func from an external func compiled with split
>> >> stack may lead to a 64K stack chunk alloc.
>> >
>> > Where does this allocation take place from? There should simply be a
>> > way to inhibit it.
>> In the linker (gold linker).
>
> Well gold isn't running at runtime. I assume you mean it _arranges_
> for this allocation to take place somehow, and that's what I'm
> wondering about whether there's a way to avoid.
Sorry,
this is done in __morestack_non_split (libgcc/config/i386/morestack.S).
the linker replaces the __morestack call in the no_split_stack
function's caller by __morestack_non_split.
>
> Rich
next prev parent reply other threads:[~2012-10-17 1:03 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-04 21:13 Rich Felker
2012-10-04 21:29 ` Daniel Cegiełka
2012-10-04 22:36 ` Rich Felker
2012-10-06 8:17 ` Daniel Cegiełka
2012-10-16 21:27 ` boris brezillon
2012-10-16 21:47 ` boris brezillon
2012-10-16 22:09 ` Szabolcs Nagy
2012-10-16 23:16 ` boris brezillon
2012-10-17 10:37 ` Szabolcs Nagy
2012-10-16 23:29 ` Rich Felker
2012-10-16 22:54 ` Rich Felker
2012-10-16 23:39 ` boris brezillon
2012-10-16 23:48 ` Rich Felker
2012-10-17 0:08 ` boris brezillon
2012-10-17 0:42 ` Rich Felker
2012-10-17 1:03 ` boris brezillon [this message]
2012-10-17 1:49 ` boris brezillon
2012-10-17 1:58 ` Rich Felker
2012-10-17 7:48 ` musl
2012-10-19 18:39 ` orc
2012-10-19 18:41 ` Rich Felker
2012-10-05 3:04 ` Rich Felker
2012-10-05 17:27 ` Rich Felker
2012-10-06 14:33 ` Szabolcs Nagy
2012-10-06 20:39 ` Szabolcs Nagy
2012-10-06 20:58 ` Rich Felker
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