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Re: [PATCH 1/2 roland/nptl] ARM: Consolidate NPTL/non versions of vfork
- From: "Joseph S. Myers" <joseph at codesourcery dot com>
- To: Roland McGrath <roland at hack dot frob dot com>
- Cc: "GNU C. Library" <libc-alpha at sourceware dot org>
- Date: Tue, 13 May 2014 23:01:05 +0000
- Subject: Re: [PATCH 1/2 roland/nptl] ARM: Consolidate NPTL/non versions of vfork
- Authentication-results: sourceware.org; auth=none
- References: <20140513221939 dot A63F52C39B4 at topped-with-meat dot com>
On Tue, 13 May 2014, Roland McGrath wrote:
> The presence of vfork/__vfork in the historical libpthread.so ABI means we
> can't just get rid of pt-vfork entirely. Instead, I've implemented the ABI
> compatibility generically in nptl/pt-vfork.c, using IFUNC redirectors so
> libpthread's symbols resolve to libc's function. This will serve other
> machines as they clean out their old pt-vfork.S files too.
ARM supports IFUNCs, but lots of architectures don't; you need something
that will work when the architecture-specific dynamic linker support for
IFUNCs isn't present in glibc (or does this somehow not need that
support)?
--
Joseph S. Myers
joseph@codesourcery.com