Date: Thu, 18 Aug 2005 23:26:12 +0200 From: Emanuel Strobl <Emanuel.strobl@gmx.net> To: freebsd-current@freebsd.org Subject: Re: BTX failure [Was: Re: pxeboot problems with BETA2] Message-ID: <200508182326.21779@harrymail> In-Reply-To: <200508171529.45664.jhb@FreeBSD.org> References: <200508161405.18729@harrymail> <200508171643.57044@harrymail> <200508171529.45664.jhb@FreeBSD.org>
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--nextPart1362037.VnUTMyujBd Content-Type: text/plain; charset="iso-8859-6" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline [...] > > int=3D00000006 err=3D00000000 efl=3D00010202 eip=3D00023c21 > > eax=3D00000000 ebx=3D000384e0 ecx=3D000384e0 edx=3D00000001 > > esi=3D00001000 edi=3D00000029 ebp=3D00086770 esp=3D00086758 > > cs=3D002b ds=3D0033 es=3D0033 fs=3D0033 gs=3D0033 ss=3D0033 > > cs:eip=3D0f 4f c2 a3 c8 7d 03 00-8d 41 0c c7 41 04 fd 44 > > ff 55 89 39 c6 44 39 ff-fe 83 c4 0c 5b 5e 5f 5d > > ss:esp=3Db4 7d 03 00 29 00 00 00-00 10 00 00 00 00 00 00 > > 83 57 02 00 02 00 00 00-a0 67 08 00 98 1c 02 00 > > BTX halted > > > > Any clue? Regarding cvsweb nothing changed recently, and I had net4501 > > boxes pxebooting fine with FreeBSD 5.3..... > > Hmm. Int 6 is an invalid opcode exception: > > 00000000 0F4FC2 cmovg eax,edx > 00000003 A3C87D0300 mov [0x37dc8],eax > 00000008 8D410C lea eax,[ecx+0xc] > 0000000B C74104FD44FF55 mov dword [ecx+0x4],0x55ff44fd > 00000012 8939 mov [ecx],edi > 00000014 C64439FFFE mov byte [ecx+edi-0x1],0xfe > 00000019 83C40C add esp,byte +0xc > 0000001C 5B pop ebx > 0000001D 5E pop esi > 0000001E 5F pop edi > 0000001F 5D pop ebp > > I'm guessing that there's been a stack overflow or some such. Your eip > is in the loader. You can try using the loader.sym from your loader > binary to look up that eip address. In the loader here on my laptop > it's in the write function: > > % nm /usr/obj/usr/src/sys/boot/i386/loader/loader.sym | sort Hmm, thanks fot that detailed explanation, but it's still beond my level :( How Do I get a loader.sym? Like you told me I rebuilt libstand with=20 DEBUG_FLAGS=3D-g and also /sys/boot but I don't habe such a file... Thanks, =2DHarry > ... > 00023b9c T readdirfd > 00023c14 T write > 00023d18 T lseek > > If you want to be able to use gdb, then rebuild libstand with debugging > (make DEBUG_FLAGS=3D-g) and rebuild all of /sys/boot with debugging (make > DEBUG_FLAGS=3D-g). You can then > use /usr/obj/usr/src/sys/boot/i386/pxeldr/pxeboot for your pxeboot and > you can run gdb on /usr/obj/usr/src/sys/boot/i386/loader/loader.sym and > you can do listings of the addresses for eip, etc. --nextPart1362037.VnUTMyujBd Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (FreeBSD) iD8DBQBDBPz9Bylq0S4AzzwRArtzAJ4igAkVjNeJHWY13uEqfl1gIlwOMgCcCDbP uB1nZnh8/edGDDj5M/R6wZc= =f6hs -----END PGP SIGNATURE----- --nextPart1362037.VnUTMyujBd--
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