[axfs-developer] Mounting profiled axfs

[Andre P. <and...@im...>]

Hi list,

I am using a axfs with profiling enabled as my root filesystem. Here is 
my kernel command line: "console=ttyS0,115200n8 rootfstype=axfs 
rootflags=physaddr=0x360000". I am not able to mount the image in any 
other way than using the physaddr-flag (see last post for details).
After extracting the captured profile I tried to build the appropriate 
profiled file system image. However, mounting this image in the same way 
does not work. Well, mounting it works but trying to execute init just 
raises some "illegal instruction" messages on my serial console. Seems 
like there is something wrong :-) Maybe mapping the XIP sections fails?
If I mount the same image after booting the rootfs via nfs it works with 
the -o physaddr-flag, but I can't umount the image afterwards. If I just 
use /dev/mtd3 or /dev/mtdblock3 mouting also fails with a kernel NULL 
pointer dereference or with an Oops like the one below. I guess there is 
something wrong with handling the mount parameters on one hand and with 
mapping the XIP section on the other hand.

Any hints?

Best regards,
Andre


<log>
# mount -t axfs /dev/mtdblock3 /mnt/flash/
[  146.800000] Internal error: Oops: 17 [#1]
[  146.800000] Modules linked in:
[  146.800000] CPU: 0
[  146.800000] PC is at memcpy+0x48/0x330
[  146.800000] LR is at axfs_copy_mem+0x24/0x2c
[  146.800000] pc : [<c00f4f48>]    lr : [<c00a6d6c>]    Not tainted
[  146.800000] sp : c3de3b84  ip : 00000000  fp : c3de3bac
[  146.800000] r10: c3ced800  r9 : 00000000  r8 : 00000100
[  146.800000] r7 : 00000000  r6 : 00000000  r5 : c03a8200  r4 : 00000100
[  146.800000] r3 : c3ced800  r2 : 00000080  r1 : 00000000  r0 : c03c50c0
[  146.800000] Flags: nzCv  IRQs on  FIQs on  Mode SVC_32  Segment user
[  146.800000] Control: 397F
[  146.800000] Table: A03E4000  DAC: 00000015
[  146.800000] Process mount (pid: 196, stack limit = 0xc3de2260)
[  146.800000] Stack: (0xc3de3b84 to 0xc3de4000)
[  146.800000] 3b80:          c03a8200 00000000 00000000 00000100 
c03c50c0 00000100 c00a6d6c
[  146.800000] 3ba0: c3de3bf4 c3de3bb0 c00a6e6c c00a6d54 00000100 
00000000 c03c50c0 c03a8200
[  146.800000] 3bc0: c02f4ba0 c03ac2a0 c02f4ba0 00000100 00000000 
c03c50c0 c02f4ba0 c03ac2a0
[  146.800000] 3be0: c02f4ba0 c0224b50 c3de3c54 c3de3bf8 c00a73f0 
c00a6d80 00000100 00000000
[  146.800000] 3c00: c03a8200 c3ced800 c02f4ba0 00000000 c3de3c54 
c3de3c20 c006791c c007adc4
[  146.800000] 3c20: c006f4c4 c3ced800 a0000013 c03a8200 c03a8200 
c3cedc00 c02f4ba0 c03ac2a0
[  146.800000] 3c40: c02f4ba0 c0224b50 c3de3c7c c3de3c58 c00a8e18 
c00a7378 c3de3c7c c3d86000
[  146.800000] 3c60: c3cedc00 c0224b50 00008000 00008000 c3de3cac 
c3de3c80 c00a8edc c00a8dd0
[  146.800000] 3c80: c03ac2a0 c00a736c c02f4ba0 c3de3c98 01f00003 
c3d86000 c3de3cc0 c3cedc00
[  146.800000] 3ca0: c3de3d44 c3de3cb0 c00a91ec c00a8e88 00000003 
c00a736c c02f4ba0 c025a600
[  146.800000] 3cc0: c3d792b8 c02f4ca0 c3de3d14 c3de3cd8 c00624e4 
00000001 00000001 00000000
[  146.800000] 3ce0: 000000d0 00000001 c006f4c4 c03e2000 a0000013 
c025a600 c0224b50 00008000
[  146.800000] 3d00: c02f4ba0 c3d86000 c3de3d34 c3de3d18 c006274c 
c0062774 c3de3d3c c3de3d74
[  146.800000] 3d20: c3cedc00 c3d86000 c0224b50 00008000 c02f4ba0 
c3d86000 c3de3da4 c3de3d48
[  146.800000] 3d40: c00a6cb0 c00a9058 c02f4ba0 c3de3d74 c3de3d7c 
c3de3d60 c006274c c0062774
[  146.800000] 3d60: 00000000 c02f4ba0 00000000 00000000 c03e2000 
00000000 c3d95ba0 c02f4ba0
[  146.800000] 3d80: fffffff4 c3d86000 c03e2000 c0224b50 c03e2000 
c000e000 c3de3dd4 c3de3da8
[  146.800000] 3da0: c0067e38 c00a6a64 c02f4ba0 c03e2000 c3de3dd4 
c0224b50 ffffffed c03e2000
[  146.800000] 3dc0: c3d86000 00008000 c3de3df4 c3de3dd8 c0067ed0 
c0067dec c3de3df4 00000000
[  146.800000] 3de0: 00000000 00000000 c3de3f6c c3de3df8 c007cad0 
c0067ea0 c3d67ee8 c0354040
[  146.800000] 3e00: c3de3e4c c3de3e10 c00207dc c0020568 c3de3f44 
00000001 00000001 00000017
[  146.800000] 3e20: 00008000 ffffffff c0220678 00000017 c3de3f00 
00062000 60000013 00061018
[  146.800000] 3e40: c3de3efc c3de3e50 c0020974 c00205e8 c00f9144 
c00f8a54 00000090 00000000
[  146.800000] 3e60: c3cf4000 00001000 00001f03 c000a968 c000a968 
0000000f 20000013 c0223804
[  146.800000] 3e80: 00000000 00061018 c3de3ee4 c3de3e98 c0050a44 
c0050460 00000044 c000afbc
[  146.800000] 3ea0: 000200d0 00000000 00000000 00000001 c0223a84 
c0223a84 000061b0 00000000
[  146.800000] 3ec0: 00061018 000000d0 00000000 c0354040 c3de2000 
c0223a80 c3de3f34 ffffffff
[  146.800000] 3ee0: c3de3f34 00000018 c000fd58 c02f4320 c3de3f6c 
c3de3f00 c001a7ec 00000001
[  146.800000] 3f00: 00000001 00000000 00000000 00062000 00001000 
00061018 00000018 c03e2000
[  146.800000] 3f20: c3de3f84 c3de2000 00061018 c3de3f6c 00000000 
c3de3f48 00000000 c01af300
[  146.800000] 3f40: 20000013 00000000 c3cf4000 bec62eaf 00008000 
c001ad64 c3de2000 00061018
[  146.800000] 3f60: c3de3fa4 c3de3f70 c007cbc8 c007c59c c03e2000 
400a6e58 c3de3f9c c3d86000
[  146.800000] 3f80: c000e000 c03e2000 00061018 bec62ebe bec62eaa 
00000015 00000000 c3de3fa8
[  146.800000] 3fa0: c001abe0 c007cb48 00061018 bec62ebe bec62eaf 
bec62ebe bec62eaa 00008000
[  146.800000] 3fc0: 00061018 bec62ebe bec62eaa 00000015 00008000 
00008000 00061018 0000c648
[  146.800000] 3fe0: 4001b644 bec628a0 0002ff80 4001b654 20000010 
bec62eaf 00000000 00000000
[  146.800000] Backtrace:
[  146.800000] [<c00a6d48>] (axfs_copy_mem+0x0/0x2c) from [<c00a6e6c>] 
(axfs_copy_metadata+0xf8/0x1e0)
[  146.800000] [<c00a6d74>] (axfs_copy_metadata+0x0/0x1e0) from 
[<c00a73f0>] (axfs_fill_super+0x84/0x9b0)
[  146.800000] [<c00a736c>] (axfs_fill_super+0x0/0x9b0) from 
[<c00a8e18>] (get_sb_mtd_aux+0x54/0xb8)
[  146.800000] [<c00a8dc4>] (get_sb_mtd_aux+0x0/0xb8) from [<c00a8edc>] 
(get_sb_mtd_nr+0x60/0x70)
[  146.800000]  r8 = 00008000  r7 = 00008000  r6 = C0224B50  r5 = C3CEDC00
[  146.800000]  r4 = C3D86000
[  146.800000] [<c00a8e7c>] (get_sb_mtd_nr+0x0/0x70) from [<c00a91ec>] 
(axfs_get_sb_mtd+0x1a0/0x23c)
[  146.800000]  r7 = C3CEDC00  r6 = C3DE3CC0  r5 = C3D86000  r4 = 01F00003
[  146.800000] [<c00a904c>] (axfs_get_sb_mtd+0x0/0x23c) from 
[<c00a6cb0>] (axfs_get_sb+0x258/0x2f0)
[  146.800000] [<c00a6a58>] (axfs_get_sb+0x0/0x2f0) from [<c0067e38>] 
(vfs_kern_mount+0x58/0x94)
[  146.800000] [<c0067de0>] (vfs_kern_mount+0x0/0x94) from [<c0067ed0>] 
(do_kern_mount+0x3c/0x50)
[  146.800000]  r8 = 00008000  r7 = C3D86000  r6 = C03E2000  r5 = FFFFFFED
[  146.800000]  r4 = C0224B50
[  146.800000] [<c0067e94>] (do_kern_mount+0x0/0x50) from [<c007cad0>] 
(do_mount+0x540/0x5ac)
[  146.800000]  r6 = 00000000  r5 = 00000000  r4 = 00000000
[  146.800000] [<c007c590>] (do_mount+0x0/0x5ac) from [<c007cbc8>] 
(sys_mount+0x8c/0xd4)
[  146.800000] [<c007cb3c>] (sys_mount+0x0/0xd4) from [<c001abe0>] 
(ret_fast_syscall+0x0/0x2c)
[  146.800000]  r7 = 00000015  r6 = BEC62EAA  r5 = BEC62EBE  r4 = 00061018
[  146.800000] Code: ba000002 f5d1f03c f5d1f05c f5d1f07c (e8b151f8)
</log>