Date: Sun, 20 May 2007 21:43:31 -0400 (EDT) From: Wes Morgan <morganw@chemikals.org> To: Kris Kennaway <kris@obsecurity.org> Cc: Dag-Erling Sm??rgrav <des@des.no>, freebsd-current@freebsd.org, Harald Schmalzbauer <h.schmalzbauer@omnisec.de> Subject: Re: strange "Exec format error" (gcc4.2 suspicious) Message-ID: <20070520214222.L44264@volatile.chemikals.org> In-Reply-To: <20070521013910.GA46734@xor.obsecurity.org> References: <200705201954.00476.h.schmalzbauer@omnisec.de> <868xbjib8t.fsf@dwp.des.no> <200705202130.55833.h.schmalzbauer@omnisec.de> <20070520184710.75db1335@kan.dnsalias.net> <20070520210704.H33354@volatile.chemikals.org> <20070521012910.GA46689@xor.obsecurity.org> <20070521013910.GA46734@xor.obsecurity.org>
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On Sun, 20 May 2007, Kris Kennaway wrote: > On Sun, May 20, 2007 at 09:29:10PM -0400, Kris Kennaway wrote: >> On Sun, May 20, 2007 at 09:07:24PM -0400, Wes Morgan wrote: >>> On Sun, 20 May 2007, Alexander Kabaev wrote: >>> >>>> On Sun, 20 May 2007 21:30:55 +0200 >>>> Harald Schmalzbauer <h.schmalzbauer@omnisec.de> wrote: >>>> >>>>> Am Sonntag, 20. Mai 2007 schrieb Dag-Erling Sm?rgrav: >>>>>> Harald Schmalzbauer <h.schmalzbauer@omnisec.de> writes: >>>>>>> I compiled samba on a fresh -current and I'm seeing strange >>>>>>> errors. When I try to execute 'net' I get this error: >>>>>>> /usr/local/bin/net: Exec format error. Binary file not executable. >>>>>> >>>>>> If you're running amd64, there was briefly a bug that caused the >>>>>> 32-bit >>>>> >>>>> It was my very first thought too, but it's i386. It's a xeon 3050 >>>>> (core2, thus EM64-T) processor but world alwys was i386 and also is >>>>> for that jail. Could it be possible that there's any runtime >>>>> detection which made me 64-bit binaries on a 32-bit base system? >>>>> >>>> Samba auto-detected -fpie support in GCC 4.3 and tried to use it. >>>> FreeBSD kernel does not know how to deal with binaries created by this >>>> option yet, so it freaks out. >>>> >>>> Add --disable-pie to CONFIGURE_ARGS in sambe3 port for now. >>> >>> This same problem exists for kdelibs3, maybe other kde ports >>> (investigating now). >> >> Are you sure, they do not appear to compile with -fPIE. > > Hmm, I guess they are silencing their compiler invocations via libtool > or something. I have to ask the stupidly obvious question of why isn't the compiler smart enough to realize (or forcefully taught) that our platform doesn't support this? -- This .signature sanitized for your protection
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