L4Re: unhandled exception while building Fiasco.OC-L4Re for ARM platform

Adam Lackorzynski adam at os.inf.tu-dresden.de
Tue Aug 4 21:35:09 CEST 2015


Hi,

On Mon Aug 03, 2015 at 12:33:05 +0530, Raja Sekhar wrote:
> I'm getting unhandled exception while running clntsrv example
> 
> 
> I've build Fiasco-L4Re system with the following specifications
> *Fiasco.OC:*
>     Architecture (ARM processor family)
>     Platform (ARM RealView Platform)
>     Realview Platform (PBX)
>     Start of RAM (physical address) (0x00000000)
>     CPU (ARM Cortex-A9 CPU)
> *L4Re:*
>     Target Architecture (ARM architecture)
>     CPU variant (ARMv4 type CPU)

Could you switch to ARMv7 here as this is the corresponding version for
a Cortex-A9.

>     Platform Selection (ARM Realview PBX)
> 
> and *trying to run examples/clntsrv* by adding the following entry in
> module.list
> 
> entry clntsrv
> bootstrap bootstrap -serial
> kernel fiasco -serial_esc
> roottask moe rom/clntsrv.cfg
> module clntsrv.cfg
> module l4re
> module ned
> module ex_clntsrv-server
> module ex_clntsrv-client
> 
> Creating image:
> 
> make elfimage E=clntsrv
> MODULE_SEARCH_PATH=`pwd`/../Fiasco.OC:`pwd`/source/pkg/examples/clntsrv
> 
> Running image on QEMU:
> 
> qemu-system-arm -M realview-pbx-a9 --kernel images/bootstrap_clntsrv
> -m 256M -serial /dev/pts/4
> 
> L4 Bootstrapper
>   Build: #56 Thu Jul 30 23:21:33 IST 2015, 4.7.3 20130226 (prerelease)
>   Scanning up to 256 MB RAM
>   Memory size is 256MB (00000000 - 0fffffff)
>   RAM: 0000000000000000 - 000000000fffffff: 262144kB
>   Total RAM: 256MB
>   mod07: 0113d000-011565bc: ex_clntsrv-client
>   mod06: 01123000-0113c5c0: ex_clntsrv-server
>   mod05: 010d0000-01122bf4: ned
>   mod04: 010b6000-010cf49c: l4re
>   mod03: 010b5000-010b52a6: clntsrv.cfg
>   mod02: 01083000-010b4668: moe
>   mod01: 01079000-01082380: sigma0
>   mod00: 01015000-01078770: fiasco
>   Moving up to 8 modules behind 1100000
>   moving module 00 { 1015000-107876f } -> { 1242000-12a576f } [407408]
>   moving module 01 { 1079000-108237f } -> { 12a6000-12af37f } [37760]
>   moving module 02 { 1083000-10b4667 } -> { 12b0000-12e1667 } [202344]
>   moving module 03 { 10b5000-10b52a5 } -> { 1157000-11572a5 } [678]
>   moving module 04 { 10b6000-10cf49b } -> { 1158000-117149b } [103580]
>   moving module 05 { 10d0000-1122bf3 } -> { 1172000-11c4bf3 } [338932]
>   moving module 06 { 1123000-113c5bf } -> { 1100000-11195bf } [103872]
>   moving module 07 { 113d000-11565bb } -> { 111a000-11335bb } [103868]
>   moving module 03 { 1157000-11572a5 } -> { 1134000-11342a5 } [678]
>   moving module 04 { 1158000-117149b } -> { 1135000-114e49b } [103580]
>   moving module 05 { 1172000-11c4bf3 } -> { 114f000-11a1bf3 } [338932]
>   Scanning fiasco -serial_esc
>   Scanning sigma0
>   Scanning moe rom/clntsrv.cfg
>   Relocated mbi to [0x100e000-0x100e140]
>   Loading fiasco
>   Loading sigma0
>   Loading moe
>   find kernel info page...
>   found kernel info page at 0x2000
> Regions of list 'regions'
>     [     1000,      1abf] {      ac0} Kern   fiasco
>     [     2000,     72fff] {    71000} Kern   fiasco
>     [    90000,     9643b] {     643c} Sigma0 sigma0
>     [    98000,     9e17b] {     617c} Sigma0 sigma0
>     [   140000,    16becb] {    2becc} Root   moe
>     [   170000,    186f0f] {    16f10} Root   moe
>     [  1000000,   10143f7] {    143f8} Boot   bootstrap
>     [  100e000,   100e23d] {      23e} Root   Multiboot info
>     [  1100000,   11a1bf3] {    a1bf4} Root   Module
>   API Version: (87) experimental
>   Sigma0 config    ip:00090100 sp:01013de4
>   Roottask config  ip:001401fc sp:00000000
>   Starting kernel fiasco at 000012b4
> Realview System ID: Rev=0 HBI=178 Build=0 Arch=5 FPGA=00
> Hello from Startup::stage2
> Per_cpu_data_alloc: (orig: 0xf00605e8-0xf0060f68)
> Number of IRQs available at this GIC: 96
> Cache config: ON
> ID_PFR[01]:  00001031 00000001 ID_[DA]FR0: 00000000 00000000
> ID_MMFR[04]: 00100103 20000000 01230000 00002111
> L2: ID=410000c8 Type=1c100100 Aux=30520000 WMask=ff S=0
> L2: Type L2C-310 Size = 128kB
> SERIAL ESC: allocated IRQ 44 for serial uart
> Not using serial hack in slow timer handler.
> Welcome to Fiasco.OC (arm)!
> L4/Fiasco.OC arm microkernel (C) 1998-2013 TU Dresden
> Rev: rexported compiled with gcc 4.7.3 for Realview    []
> Build: #4 Tue Jul 28 22:46:31 IST 2015
> 
> Per_cpu_data_alloc: (orig: 0xf00605e8-0xf0060f68)
> Allocate 2432 bytes (2KB) for CPU[4] local storage (offset=1187a18,
> 0xf11e8000-0xf11e8980)
> Number of CPUs: 1
> Calibrating timer loop... done.
> SIGMA0: Hello!
>   KIP @ 2000
>   allocated 4KB for maintenance structures
> SIGMA0: Dump of all resource maps
> RAM:------------------------
> [0:0;fff]
> [0:73000;8ffff]
> [0:97000;97fff]
> [0:9f000;13ffff]
> [4:140000;16bfff]
> [0:16c000;16ffff]
> [4:170000;186fff]
> [0:187000;100dfff]
> [4:100e000;100efff]
> [0:100f000;10fffff]
> [4:1100000;11a1fff]
> [0:11a2000;effffff]
> IOMEM:----------------------
> [0:10000000;ffffffff]
> MOE: Hello world
> MOE: found 244324 KByte free memory
> MOE: found RAM from 73000 to f000000
> MOE: allocated 239 KByte for the page array @0x9f000
> MOE: virtual user address space [0-bfffffff]
> MOE: rom name space cap -> [C:501000]
>   BOOTFS: [1134000-11342a6] [C:503000] clntsrv.cfg
>   BOOTFS: [1135000-114e49c] [C:504000] l4re
>   BOOTFS: [114f000-11a1bf4] [C:505000] ned
>   BOOTFS: [1100000-11195c0] [C:506000] ex_clntsrv-server
>   BOOTFS: [111a000-11335bc] [C:507000] ex_clntsrv-client
> MOE: cmdline: moe rom/clntsrv.cfg
> MOE: Starting: rom/ned rom/clntsrv.cfg
> MOE: loading 'rom/ned'
> Ned says: Hi World!
> ****I am in luaK_prefix()****
> L4Re: unhandled exception: pc=0x1021984
> 
> I have gone through the code flow for "ned" and I found that the
> exception is raising while loading ned.lua script,
> At certain point luaK_prefix() is trying to call codearith() but
> failed to call codearith().
> both the function are located at l4re/pkg/lua/lib/contrib/src/lcode.c
> 
> I'm able to get print statement which I placed before calling the
> codearith() in luaK_prefix(),
> But not printing the statement which I placed inside the codearith()
> 
> Can you please get me out from this issue.

Please check whether this persists after recompiling for ARMv7.
If not, I'd like to know which instruction/code is at 0x1021984.



Adam
-- 
Adam                 adam at os.inf.tu-dresden.de
  Lackorzynski         http://os.inf.tu-dresden.de/~adam/



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