Hi Linux Virtualization Mailing List Members,
I am trying to develop a driver for virtio blk device in guest. I can safely
mount the virtual blk device with: mount /dev/vda /mnt/
in /mnt/ I can read & write the device. But when I run a simple hello world
program in /mnt/root/, this error happens:
root@linux_guest:/mnt/root# ./helloworld_static
[ 23.003459] CPU: 0 PID: 491 Comm: helloworld_stat Not tainted 3.19.1+ #101
[ 23.007030] Hardware name: ARM-Versatile Express
[ 23.010102] task: 970f2400 ti: 9184e000 task.ti: 9184e000
[ 23.011645] PC is at 0x11d6a
[ 23.012801] LR is at 0x89b3
[ 23.013627] pc : [<00011d6a>] lr : [<000089b3>] psr: 80000030
[ 23.013627] sp : 7e932c10 ip : 00008e45 fp : 00000000
[ 23.017108] r10: 00000000 r9 : 00000000 r8 : 00000000
[ 23.023165] r7 : 00000000 r6 : 00053794 r5 : 7e932dd4 r4 : 0006a9b4
[ 23.026854] r3 : 0000022c r2 : 00000000 r1 : ffffffd0 r0 : 00000021
[ 23.031814] Flags: Nzcv IRQs on FIQs on Mode USER_32 ISA Thumb Segment
user
[ 23.036225] Control: 10c5387d Table: 916f4059 DAC: 00000015
[ 23.040885] CPU: 0 PID: 491 Comm: helloworld_stat Not tainted 3.19.1+ #101
[ 23.043224] Hardware name: ARM-Versatile Express
[ 23.045168] [<80012c68>] (unwind_backtrace) from [<80010dc8>]
(show_stack+0x10/0x14)
[ 23.050392] [<80010dc8>] (show_stack) from [<8030c9d0>]
(__do_user_fault.isra.10+0x98/0xa8)
[ 23.052687] [<8030c9d0>] (__do_user_fault.isra.10) from [<80017c6c>]
(do_page_fault+0x35c/0x3b8)
[ 23.055358] [<80017c6c>] (do_page_fault) from [<80008488>]
(do_DataAbort+0x34/0x98)
[ 23.057510] [<80008488>] (do_DataAbort) from [<80011a5c>]
(__dabt_usr+0x3c/0x40)
[ 23.065243] Exception stack(0x9184ffb0 to 0x9184fff8)
[ 23.069425] ffa0: 00000021 ffffffd0
00000000 0000022c
[ 23.073779] ffc0: 0006a9b4 7e932dd4 00053794 00000000 00000000 00000000
00000000 00000000
[ 23.079985] ffe0: 00008e45 7e932c10 000089b3 00011d6a 80000030 ffffffff
Can you tell me what I could probably miss? Thank you very much, I forever in
debt for your time and effort to read this. I am writing the BLK Device based
on Lguest's code.
some information that may help:
root@linux_guest:/mnt/root# file helloworld_static
helloworld_static: ELF 32-bit LSB executable, ARM, version 1 (SYSV), statically
linked, for GNU/Linux 2.6.31,
BuildID[sha1]=0xc63622efd65f635f2b93c05caa8a1302d60a8caa, not stripped
root@linux_guest:/mnt/root# uname -a
Linux linux_guest 3.19.1+ #101 Tue Jul 7 09:35:23 KST 2015 armv7l GNU/Linux
root@linux_guest:/mnt/root# ls -l helloworld_static
-rwxr-xr-x 1 root root 456218 Jul 7 2015 helloworld_static
during booting:
[ 0.202185] brd: module loaded
[ 0.262288] loop: module loaded
[ 0.304868] vda: unknown partition table
AtLFprofile: no performance counters
[ 0.399451] oprofile: using timer interrupt.
CP: cubic registered
[ 0.403361] NET: Registered protocol family 17
[ 0.405039] Registering SWP/SWPB emulation handler
[ 0.409375] RAMDISK: gzip image found at block 0
[ 0.572643] EXT2-fs (ram0): warning: mounting unchecked fs, running e2fsck
is recommended
[ 0.620201] VFS: Mounted root (ext2 filesystem) on device 1:0.
[ 0.622113] devtmpfs: mounted
[ 0.623328] Freeing unused kernel memory: 172K (80417000 - 80442000)
Starting logging: OK
Initializing random number generator...
[ 0.691483] random: dd urandom read with 0 bits of entropy available
done.
Starting network...
Starting dropbear sshd: OK
linux_guest login:
_______________________________________________
Virtualization mailing list
Virtualization@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/virtualization