Date: Wed, 12 Jan 2000 20:28:49 +0100 (CET) From: Oliver Fromme <olli@dorifer.heim3.tu-clausthal.de> To: freebsd-emulation@FreeBSD.ORG Subject: Re: DUAL-brand ELF binaries Message-ID: <200001121928.UAA45158@dorifer.heim3.tu-clausthal.de> In-Reply-To: <85ie6g$13m2$1@atlantis.rz.tu-clausthal.de>
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Vladimir B. Grebeschikov <vova@express.ru> wrote in list.freebsd-emulation:
> Is there theoretical problem to make dual-brand binaries ?
>
> real situation: I need FreeBSD program with linux libraries
That's not possible, if my understanding of matters is correct.
Someone please correct me if I'm wrong. :-)
FreeBSD and Linux binaries use different syscall mappings. The
appropriate mapping is selected by the exec() call and stays
the same for the whole process during its lifetime. If you
want to mix FreeBSD binaries and Linux libraries, the mapping
would have to be switched "on the fly" during code execution
inside the process. This is currently not supported, AFAIK,
and I guess it would be non-trivial to implement without a
significant performance hit.
Regards
Oliver
--
Oliver Fromme, Leibnizstr. 18/61, 38678 Clausthal, Germany
(Info: finger userinfo:olli@dorifer.heim3.tu-clausthal.de)
"In jedem Stück Kohle wartet ein Diamant auf seine Geburt"
(Terry Pratchett)
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