From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailserv2.iuinc.com (IDENT:qmailr@mailserv2.iuinc.com [206.245.164.55]) by puffin.external.hp.com (8.9.3/8.9.3) with SMTP id QAA03259 for ; Sat, 2 Sep 2000 16:41:39 -0600 Sender: rbrad@mailserv2.iuinc.com Message-ID: <39B1822A.4E8F20AB@uswest.net> Date: Sat, 02 Sep 2000 16:41:46 -0600 From: Ryan Bradetich MIME-Version: 1.0 To: parisc-linux@thepuffingroup.com Content-Type: text/plain; charset=us-ascii Subject: [parisc-linux] Boot error on C200+ List-ID: Hello, I am getting the following error when I attempt to boot parisc-linux on the C200+. VFS: Mounted root (nfs filesystem) readonly. execve /sbin/init c0270008 c0270030 Kernel Fault: Code=7 regs=c7f98248 (Addr=00000110) PSW : 0004000b GR 1 : 00002000 GR 2 : 00013403 GR 3 : 00000000 GR 4 : 2001ff74 GR 5 : 00000000 GR 6 : 000777f4 GR 7 : 000010c4 GR 8 : 000011bc GR 9 : c7f98000 GR10 : c022fa78 GR11 : c0270030 GR12 : c0270008 GR13 : c022fe14 GR14 : c0270000 GR15 : 617bfdfb GR16 : c027c60c GR17 : 00000000 GR18 : c02b0000 GR19 : 00000001 GR20 : 00000037 GR21 : 00089b9c GR22 : 00089bd8 GR23 : 000010c4 GR24 : 2001ff74 GR25 : 00000001 GR26 : 00000000 GR27 : 00088f00 GR28 : b64d8e60 GR29 : b44302d0 GR30 : 20020140 GR31 : 00022d63 SR0 : 00002000 SR1 : fffd2dff SR2 : 00000000 SR3 : 00002000 SR4 : 00000000 SR5 : 00002000 SR6 : 00002000 SR7 : 00002000 IASQ : 00000000 00000000 IAOQ : 00000110 00000114 ORIG_R28 : ffdf7fff IIR : 43ffff40 ISR : 00000000 IOR : 00000000 Paul Bame helped me start tracking this error down. I wanted to post his analysis along with the boot message to this list for further comment. (Hopefully his analysis will help other how to start debugging these errors as Paul helped me.) - Kernel Fault Code 7 is an Instruction Memory Protection Trap. - Stack Pointer (GR30) is in user space. Most of the time if the kernel is in kernel space GR30 will look like this: 0xcxxxxxxx. - GR2 is often the address where a subroutine will return, so it tells where it was called from. In this case: 00013403. - The last two bits of GR2 are non-zero, which is consistent with a userspace program. - Perform an objdump -d on sash and look for address 133f8. (GR2 & 0xfffffffc) - 0x8 (two instructions). 133f8: e8 47 12 b4 b,l 22d58 <__libc_fcntl>,rp 133fc: 34 19 00 02 ldi 1,r25 13400: 8f 9f 20 50 cmpib,<> -1,ret0,13430 13404: 4b c2 3f 59 ldw -54(sr0,sp),rp - Find out who/what called your kernel, by looking up the sysmbols in sash (Note the sasy binary must contain symbols): hppa-linux-nm -n sash | grep 22d58 00022d58 W __fcntl 00022d58 T __libc_fcntl 00022d58 W fcntl I am going to start digging around in sash and glibc to see if I can figure out anymore information on this problem. Any help/advice is appreciated. Thanks, Ryan