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Re: Is there filter-like functionality in binutils?
- From: Ian Lance Taylor <iant at google dot com>
- To: Nico Williams <nico at cryptonector dot com>
- Cc: Binutils <binutils at sourceware dot org>
- Date: Tue, 15 Oct 2013 21:24:51 -0700
- Subject: Re: Is there filter-like functionality in binutils?
- Authentication-results: sourceware.org; auth=none
- References: <CAK3OfOie-Su2tWdvq76vf3-i6xazFKAg6nDP+3kzPjuJLFWjjg at mail dot gmail dot com>
On Tue, Oct 15, 2013 at 5:40 PM, Nico Williams <nico@cryptonector.com> wrote:
> An ELF filter is a shared object that can "filter" another object (the
> filtee). It's mostly useful for three purposes: providing stubs for
> symbols whose implementations have moved from one object to another,
> providing stubs for possibly-not-installed functionality, and
> interposition on specific objects/symbols (and without having to use
> LD_PRELOAD).
>
> Is there any such functionality in binutils/gold/rtld?
Essentially no support is required in binutils/gold. All the
interesting code is in the dynamic linker. You sent this to the
binutils list; the binutils do not include a dynamic linker.
The glibc dynamic linker does support filters.
Ian