From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <3D458D46.D3511AAE@broadcom.com> Date: Mon, 29 Jul 2002 11:45:26 -0700 From: "James Dougherty" MIME-Version: 1.0 To: linuxppc-embedded@lists.linuxppc.org, jfd@broadcom.com Subject: Problems with mount system call -- cannot mount procfs! Content-Type: text/plain; charset=us-ascii Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: Hi, I've recently ported Linux 2.4.2 and Linux 2.4.19-rc3 to our custom MPC8245 processor board. The system boots up fine, and mounts a known good root filesystem, however, it fails to mount procfs. Here is a trace of the "mount" command on 2.4.2 after the system boots: root@switch-2:/# mount -t proc proc /proc Oops: Exception in kernel mode, sig: 4 NIP: C004021C XER: 00000000 LR: C0003FFC SP: C3765E80 REGS: c3765dd0 TRAP: 0700 MSR: 00089032 EE: 1 PR: 0 FP: 0 ME: 1 IR/DR: 11 TASK = c3764000[37] 'mount' Last syscall: 21 last math c3764000 last altivec 00000000 GPR00: 00000054 C3765E80 C3764000 100203D8 100203E8 100203F8 C0ED0000 00000000 GPR08: 100203F9 10020484 C0040214 48422488 48422488 100265D0 00000000 100CC250 GPR16: 7FFFFC6C 7FFFFC68 10020000 00000000 00009032 03765E80 00000000 C0004268 GPR24: C0003FA0 100203B8 7FFFFE8F 00000000 100203D8 7FFFFC68 00000000 7FFFFC78 Call backtrace: C0003FFC FFFFFFFF 10002654 100031D8 10003EB8 10004CC4 0FEDA188 00000000 Illegal instruction root@switch-2:/# root@switch-2:/# strace mount -t proc proc /proc Oops: Exception in kernel mode, sig: 4 NIP: C004021C XER: 00000000 LR: C00040B0 SP: C36BDE80 REGS: c36bddd0 TRAP: 0700 MSR: 00089032 EE: 1 PR: 0 FP: 0 ME: 1 IR/DR: 11 TASK = c36bc000[39] 'mount' Last syscall: 21 last math c36bc000 last altivec 00000000 GPR00: 00000054 C36BDE80 C36BC000 100203D8 100203E8 100203F8 C0ED0000 00000000 GPR08: 100203F9 10020484 C0040214 C36BDE70 01000000 10039790 00000000 100B1690 GPR16: 7FFFFC5C 7FFFFC58 10020000 00000000 00009032 036BDE80 00000000 C0004268 GPR24: C0003FA0 100203B8 7FFFFE8A 00000000 100203D8 7FFFFC58 00000000 7FFFFC68 Call backtrace: C0004064 FFFFFFFF 10002654 100031D8 10003EB8 10004CC4 0FEDA188 00000000 execve("/bin/mount", ["mount", "-t", "proc", "proc", "/proc"], [/* 18 vars */]) = 0 brk(0) = 0x1002014c open("/etc/ld.so.preload", O_RDONLY) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY) = -1 ENOENT (No such file or directory) open("/lib/libc.so.6", O_RDONLY) = 3 read(3, "\177ELF\1\2\1\0\0\0\0\0\0\0\0\0\0\3\0\24\0\0\0\1\0\2\243"..., 1024) = 1024 fstat64(0x3, 0x7ffff090) = 0 mmap(0xfeb0000, 1307264, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0xfeb0000 mprotect(0xffc1000, 189056, PROT_NONE) = 0 mmap(0xffd0000, 106496, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0x110000) = 0xffd0000 mmap(0xffea000, 21120, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xffea000 close(3) = 0 getpid() = 39 brk(0) = 0x1002014c brk(0x10020174) = 0x10020174 brk(0x10021000) = 0x10021000 open("/dev/null", O_RDWR) = 3 close(3) = 0 getuid() = 0 geteuid() = 0 lstat("/etc/mtab", {st_mode=S_IFLNK|0777, st_size=12, ...}) = 0 stat("/sbin/mount.proc", 0x7ffffa28) = -1 ENOENT (No such file or directory) rt_sigprocmask(SIG_BLOCK, ~[TRAP SEGV], NULL, 8) = 0 mount("proc", "/proc", "proc", 0xc0ed0000, 0 +++ killed by SIGILL +++ root@switch-2:/# c0040214 : c0040214: 94 21 ff d0 stwu r1,-48(r1) c0040218: 7c 08 02 a6 mflr r0 c004021c: bf 61 00 1c stmw r27,28(r1) <----------- c0040220: 90 01 00 34 stw r0,52(r1) c0040224: 7c 7d 1b 78 mr r29,r3 c0040228: 7c 9e 23 78 mr r30,r4 c004022c: 7c db 33 78 mr r27,r6 c0040230: 7c fc 3b 78 mr r28,r7 c0040234: 7c a3 2b 78 mr r3,r5 c0040238: 38 81 00 08 addi r4,r1,8 c004023c: 4b ff fb 75 bl c003fdb0 c0040240: 7c 7f 1b 79 mr. r31,r3 c0003ffc : c0003ffc: 90 61 00 bc stw r3,188(r1) c0004000: 39 40 fd fd li r10,-515 c0004004: 7c 03 50 40 cmplw r3,r10 c0004008: 41 80 00 20 blt c0004028 c000400c: 7c 63 00 d0 neg r3,r3 c0004010: 2c 03 02 02 cmpwi r3,514 c0004014: 40 82 00 08 bne c000401c c0004018: 38 60 00 04 li r3,4 Anybody have an idea on what is going wrong here or how I should proceed to debug? Many thanks in advance. -James -- James F. Dougherty, III Broadcom Corporation jfd@broadcom.com (408) 501-8273 ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/