Date: Thu, 27 Oct 2005 15:21:02 +1000 (EST) From: Bruce Evans <bde@zeta.org.au> To: "M. Warner Losh" <imp@bsdimp.com> Cc: developers@freebsd.org, PeterJeremy@optushome.com.au, freebsd-security@freebsd.org, cracauer@cons.org, delphij@delphij.net Subject: Re: Is it feasible to cross-build compat5x binary? Message-ID: <20051027151929.K24217@delplex.bde.org> In-Reply-To: <20051025.231729.26928360.imp@bsdimp.com> References: <20051023232935.GC602@dragon.NUXI.org> <20051024080811.GF39882@cirb503493.alcatel.com.au> <20051024064605.A44523@cons.org> <20051025.231729.26928360.imp@bsdimp.com>
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On Tue, 25 Oct 2005, M. Warner Losh wrote: > In message: <20051024064605.A44523@cons.org> > Martin Cracauer <cracauer@cons.org> writes: > : ELF object files are timestamped. But there's some elf-cmp out there. > > Elf .o's are timestampped, Script started on Thu Oct 27 15:17:31 2005 ttyv2:bde@epsplex:/tmp/z> echo "int i = 1;" >z.c ttyv2:bde@epsplex:/tmp/z> cc -c z.c ttyv2:bde@epsplex:/tmp/z> mv z.o z.o~ ttyv2:bde@epsplex:/tmp/z> cc -c z.c ttyv2:bde@epsplex:/tmp/z> md5 z.o~ z.o MD5 (z.o~) = c92e2bbb5a0e8b4f05eced238762dde1 MD5 (z.o) = c92e2bbb5a0e8b4f05eced238762dde1 ttyv2:bde@epsplex:/tmp/z> cmp z.o~ z.o ttyv2:bde@epsplex:/tmp/z> exit Script done on Thu Oct 27 15:18:14 2005 > but Elf executables are 100% reproducible, > except when people go out of their way to not make them so. Like > adding the date or person builder. True. Bruce
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