From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.org/gmane.linux.lib.musl.general/6051 Path: news.gmane.org!not-for-mail From: Szabolcs Nagy Newsgroups: gmane.linux.lib.musl.general Subject: Re: libc.so segfaults on mips Date: Thu, 4 Sep 2014 14:32:09 +0200 Message-ID: <20140904123208.GA10361@port70.net> References: <4971377a-43f4-4c82-bee6-635791bbe44b@email.android.com> <20140904073545.GP12888@brightrain.aerifal.cx> <7bb51525-1a3d-43e8-a567-7523ca3673c7@email.android.com> Reply-To: musl@lists.openwall.com NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable X-Trace: ger.gmane.org 1409833951 8747 80.91.229.3 (4 Sep 2014 12:32:31 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 4 Sep 2014 12:32:31 +0000 (UTC) To: musl@lists.openwall.com Original-X-From: musl-return-6064-gllmg-musl=m.gmane.org@lists.openwall.com Thu Sep 04 14:32:24 2014 Return-path: Envelope-to: gllmg-musl@plane.gmane.org Original-Received: from mother.openwall.net ([195.42.179.200]) by plane.gmane.org with smtp (Exim 4.69) (envelope-from ) id 1XPWD8-0000RH-0W for gllmg-musl@plane.gmane.org; Thu, 04 Sep 2014 14:32:22 +0200 Original-Received: (qmail 1545 invoked by uid 550); 4 Sep 2014 12:32:21 -0000 Mailing-List: contact musl-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: Original-Received: (qmail 1529 invoked from network); 4 Sep 2014 12:32:21 -0000 Mail-Followup-To: musl@lists.openwall.com Content-Disposition: inline In-Reply-To: <7bb51525-1a3d-43e8-a567-7523ca3673c7@email.android.com> User-Agent: Mutt/1.5.21 (2010-09-15) Xref: news.gmane.org gmane.linux.lib.musl.general:6051 Archived-At: * ???????? [2014-09-04 16:56:40 +0800]: > 4 ???????????????? 2014=A0??. 15:35:45 KRAT, Rich Felker ??????????: > >On Thu, Sep 04, 2014 at 03:07:57PM +0800, ???????? wrote: > >> Not a really blocking bug but I was wondering why cross compiled > >> musl libc.so for embedded wrt system is segfaults with this: OpenWRT does not use standard mips ABI but its own thing: you need mips-sf (softfloat) toolchain > >> % ./strace ./libc.so=20 > >> execve("./libc.so", ["./libc.so"], [/* 10 vars */]) =3D 0 > >> --- {si_signo=3DSIGSEGV, si_code=3DSI_USER, si_errno=3DEPERM, si_addr= =3D0x4} > >(Segmentation fault) --- > >> +++ killed by SIGSEGV +++ > >> Segmentation fault > >>=20 > >> A strange segfault with EPERM. > >>=20 > >> The target is mips2 bigendian router, specifically it is ar9331 SoC. > >> This is how file reports on libc.so: ELF 32-bit MSB shared object, > >> MIPS, MIPS-I version 1 (SYSV), dynamically linked, not stripped > >Could you attach the output of readelf -a libc.so? I'm guessing the > The output of readelf attached. i don't see the softfloat symbols of libgcc there (eg __addsf3) (musl malloc uses float arithmetics so ./libc.so will fail immediately) (openwrt kernel can be built with fpu emulation which is the default on normal mips kernels)