Date: Tue, 30 Oct 2001 23:11:38 -0800 (PST) From: Lamont Granquist <lamont@scriptkiddie.org> To: <hackers@freebsd.org> Cc: <jdp@polstra.com> Subject: Re: /etc/ld.so.preload? Message-ID: <20011030230606.A35139-200000@coredump.scriptkiddie.org> In-Reply-To: <20011030181830.R54298-100000@coredump.scriptkiddie.org>
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This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. Send mail to mime@docserver.cac.washington.edu for more info. --0-1072188969-1004512298=:35139 Content-Type: TEXT/PLAIN; charset=US-ASCII Well, here's a short patch to add the necessarily functionality to /var/run/ld-elf.so.hints and /usr/libexec/ld-elf.so.1. If this is acceptable, /sbin/ldconfig would need to be patched. Looks like the major bug is that if you preload libraries globally you break linux binary compatibility. On Tue, 30 Oct 2001, Lamont Granquist wrote: > Is there anything in FreeBSD that gives this functionality? My reading of > src/libexec/rtld-elf/rtld.c in both -stable and -current seems to indicate > that there isn't any such functionality (i need the global functionality > that LD_PRELOAD doesn't give me). I'd be willing to write a patch for it, > but I'd need some guidance on what would be a proper way to fix it. > > I'm thinking of a patch to ldconfig to get /etc/ld.so.preload into the > hints file and then to hack gethints() in rtld.c to take an argument > indicating which path you want to return. > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-hackers" in the body of the message > > --0-1072188969-1004512298=:35139 Content-Type: TEXT/PLAIN; charset=US-ASCII; name=patch Content-Transfer-Encoding: BASE64 Content-ID: <20011030231138.A35139@coredump.scriptkiddie.org> Content-Description: preload patch Content-Disposition: attachment; filename=patch LS0tIGluY2x1ZGUvZWxmLWhpbnRzLmh+CVR1ZSBPY3QgMzAgMTg6Mjk6NTcg MjAwMQ0KKysrIGluY2x1ZGUvZWxmLWhpbnRzLmgJVHVlIE9jdCAzMCAxODoz MTo0NyAyMDAxDQpAQCAtNDAsNyArNDAsMTAgQEANCiAJdV9pbnQzMl90CWRp cmxpc3Q7CS8qIE9mZnNldCBvZiBkaXJlY3RvcnkgbGlzdCBpbg0KIAkJCQkJ ICAgc3RyaW5nIHRhYmxlICovDQogCXVfaW50MzJfdAlkaXJsaXN0bGVuOwkv 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