Data-abort exception while trying to boot skalk/linux imx-53 branch with genode trustzone
rijurekha at ...71...
rijurekha at ...71...
Fri Jun 2 14:15:48 CEST 2017
Hi Stefan,
We looked at the USB armory Linux:
https://github.com/m-stein/linux/tree/genode_hw_usb_armory_tz_vmm,
which has very clean interfaces to talk to the genode trustzone code,
example the following files to do serial and block device operations using
SMC hypercalls.
(1) include/genode_tz_vmm_defs.h: SMC variables and arguments #defined
(2) include/genode_tz_vmm.h: SMC function declarations
(3) kernel/genode_tz_vmm.c: SMC function definitions
(4) drivers/tty/serial/genode.c: calls SMC function to use UART via genode
in secure world
(5) drivers/block/genode.c: calls SMC function to use block device via
genode in secure world
Can you please let us know is there is a similar linux source repo for
IMX53 qsb, from which this binary was built:
http://genode.org/files/images/imx53_qsb/linux_trustzone.bin? This linux
binary works great, while the binary using
https://github.com/skalk/linux/tree/imx53-tz crashes with an external data
abort.
Thanks for your time.
Riju
> Hello Stefan
> Thanks for your help. Linux is loading now but it shows i2c error and then
> dumps the same exception state as shown above `Data Abort`.
>
> ```
> da9052_ssc_i2c 0-0048: 2 - da9052_i2c_read:master_xfer Failed!!
> da9052_i2c_is_connected - i2c read failed.....
>
> ```
>
> Though the linux.bin which tz_vmm script tries to download, loads fine. It
> also shows above error but continues to load instead of crashing. I need
> the source code of whatever binary I am running. Can you help me with
> source code of the executable which is available here `
> http://genode.org/files/images/imx53_qsb/linux_trustzone.bin`.
>
> Thanks
> Abhishek
>
>
> On Thu, Jun 1, 2017 at 8:46 AM, Stefan Kalkowski <
> stefan.kalkowski at ...1...> wrote:
>
>> Hi,
>>
>> the tz_vmm component does not expect an uImage to be loaded, but the
>> pure kernel binary instead. Within the Linux build tree for instance the
>> path: "arch/arm/boot/compressed/vmlinux". I wonder, whether you got the
>> very same exception state when not trying to execute on secure world
>> RAM?
>>
>> Regards
>> Stefan
>>
>> On 05/31/2017 04:39 PM, Abhishek Kumar wrote:
>> > Hello Stefan
>> > Thanks for your reply. I tried at 80008000 address as well.
>> >
>> > abhishek at ...514...:~$ file linux
>> > linux: u-boot legacy uImage, Linux-2.6.35.3-01384-g9533414-di,
>> > Linux/ARM, OS Kernel Image (Not compressed), 2933872 bytes, Wed
>> May
>> > 31 15:52:08 2017, Load Address: 0x80008000, Entry Point:
>> 0x80008000,
>> > Header CRC: 0x83CD7B97, Data CRC: 0x914C7C24
>> >
>> >
>> >
>> > I tried to print from `start` function in
>> > "os/src/server/tz_vmm/include/vm_base.h" file.
>> >
>> > void start()
>> > {
>> > Genode::memset((void*)_state, 0,
>> > sizeof(Genode::Vm_state));
>> > _load_kernel();
>> > _load_kernel_surroundings();
>> > _state->cpsr = 0x93; /* SVC mode and IRQs
>> > disabled */
>> > _state->r0 = 0;
>> > _state->r1 = _mach_type;
>> > _state->r2 = _ram.base() +
>> > _board_info_offset();
>> > }
>> >
>> >
>> > _load_kernel() and other statements are working perfectly fine, I
>> tried
>> > printing after each line using PINF. I think that means kernel is
>> > loading fine, though I'm not sure. What might be going wrong here?
>> >
>> > Thanks
>> > Abhishek
>> >
>> > On Wed, May 31, 2017 at 2:57 PM, Stefan Kalkowski
>> > <stefan.kalkowski at ...1...
>> > <mailto:stefan.kalkowski at ...1...>> wrote:
>> >
>> > Hello,
>> >
>> > On 05/31/2017 02:25 PM, Abhishek Kumar wrote:
>> > > Hello
>> > > I am trying to run linux in normal world on genode trustzone. I
>> have
>> > > changed the run-script of genode to copy the uImage generated
>> from
>> > > skalk/linux's imx-53 branch instead of downloading (default). I
>> am
>> > > making uImage with following command:
>> > >
>> > > make uImage LOADADDR=0x70010000
>> >
>> > You are trying to relocate the Linux kernel within the memory
>> portion
>> > that is used by the secure world (Genode). The secure RAM is from
>> > 0x70000000 to 0x7fffffff. Please follow these instructions to
>> build
>> the
>> > guest kernel on your own, like referenced within the tz_vmm
>> run-script:
>> >
>> > https://genode.org/files/release-15.11/usb_armory_tz_vmm/README
>> > <https://genode.org/files/release-15.11/usb_armory_tz_vmm/README>
>> >
>> > Regards
>> > Stefan
>> >
>> > >
>> > > while executing, genode stops after starting virtual machine
>> with
>> > > following error trace:
>> > >
>> > > ```
>> > > .
>> > > .
>> > > [init] child "tz_vmm"
>> > > [init] RAM quota: 10203136
>> > > [init] ELF binary: tz_vmm
>> > > [init] priority: 0
>> > > [init -> tz_vmm] Start virtual machine ...
>> > > [init -> tz_vmm] Cpu state:
>> > > [init -> tz_vmm] Register Virt Phys
>> > > [init -> tz_vmm] ---------------------------------
>> > > [init -> tz_vmm] r0 = 07000000 [00000000]
>> > > [init -> tz_vmm] r1 = f801ff50 [00000000]
>> > > [init -> tz_vmm] r2 = ffffffe4 [00000000]
>> > > [init -> tz_vmm] r3 = 40002000 [00000000]
>> > > [init -> tz_vmm] r4 = 00000000 [00000000]
>> > > [init -> tz_vmm] r5 = 00000000 [00000000]
>> > > [init -> tz_vmm] r6 = 000000ee [00000000]
>> > > [init -> tz_vmm] r7 = 00000000 [00000000]
>> > > [init -> tz_vmm] r8 = 00000000 [00000000]
>> > > [init -> tz_vmm] r9 = 00000000 [00000000]
>> > > [init -> tz_vmm] r10 = 00000000 [00000000]
>> > > [init -> tz_vmm] r11 = 00000000 [00000000]
>> > > [init -> tz_vmm] r12 = 00000000 [00000000]
>> > > [init -> tz_vmm] sp = 00000000 [00000000]
>> > > [init -> tz_vmm] lr = 00000000 [00000000]
>> > > [init -> tz_vmm] ip = 0040dfe8 [00000000]
>> > > [init -> tz_vmm] cpsr = 60000093
>> > > [init -> tz_vmm] sp_und = 00000000 [00000000]
>> > > [init -> tz_vmm] lr_und = 8000800c [00000000]
>> > > [init -> tz_vmm] spsr_und = 00000093 [00000000]
>> > > [init -> tz_vmm] sp_svc = f801ff4c [00000000]
>> > > [init -> tz_vmm] lr_svc = 0040bc97 [00000000]
>> > > [init -> tz_vmm] spsr_svc = 00000000 [00000000]
>> > > [init -> tz_vmm] sp_abt = 00000000 [00000000]
>> > > [init -> tz_vmm] lr_abt = 00000000 [00000000]
>> > > [init -> tz_vmm] spsr_abt = 00000000 [00000000]
>> > > [init -> tz_vmm] sp_irq = 00000000 [00000000]
>> > > [init -> tz_vmm] lr_irq = 00000000 [00000000]
>> > > [init -> tz_vmm] spsr_irq = 00000000 [00000000]
>> > > [init -> tz_vmm] sp_fiq = 00000000 [00000000]
>> > > [init -> tz_vmm] lr_fiq = 00000000 [00000000]
>> > > [init -> tz_vmm] spsr_fiq = 00000000 [00000000]
>> > > [init -> tz_vmm] ttbr0 = 00000000
>> > > [init -> tz_vmm] ttbr1 = 00000000
>> > > [init -> tz_vmm] ttbrc = 00000000
>> > > [init -> tz_vmm] dfar = 07000000 [00000000]
>> > > [init -> tz_vmm] exception = data_abort
>> > > [init -> tz_vmm] Could not handle data-abort will exit!
>> > >
>> > >
>> > > ```
>> > >
>> > > Initially I thought I might be giving wrong load address while
>> making
>> > > uImage, but it seems problem is not that. Can someone help me
>> with
>> > what
>> > > might be possibly going wrong?
>> > >
>> > > Thanks
>> > > Abhishek
>> > >
>> > >
>> > >
>> > ------------------------------------------------------------
>> ------------------
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>> > >
>> > >
>> > > _______________________________________________
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>> > > genode-main at lists.sourceforge.net
>> > <mailto:genode-main at lists.sourceforge.net>
>> > > https://lists.sourceforge.net/lists/listinfo/genode-main
>> > <https://lists.sourceforge.net/lists/listinfo/genode-main>
>> > >
>> >
>> > --
>> > Stefan Kalkowski
>> > Genode Labs
>> >
>> > https://github.com/skalk · http://genode.org/
>> >
>> > ------------------------------------------------------------
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>> >
>> >
>> >
>> >
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>>
>> --
>> Stefan Kalkowski
>> Genode Labs
>>
>> https://github.com/skalk · http://genode.org/
>>
>> ------------------------------------------------------------
>> ------------------
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