kernel debugger on cubietruck

[Gilles DALMAS]

i comment emac line from :

# Ethernet
device        loop
device        ether
device        mii
device        smscphy
#device     cpsw
device        bpf

device        emac

# USB ethernet support, requires miibus
device        miibus

 

and re run the compilation ?

 

 

no need to re created the sd card ? just the USB flash ?

 

> Message du 20/09/14 16:09
> De : "Ganbold Tsagaankhuu" 
> A : "Gilles DALMAS" 
> Copie à : "freebsd-arm at freebsd.org" 
> Objet : Re: kernel debugger on cubietruck
> 
>

>

>
On Sat, Sep 20, 2014 at 9:25 PM, Gilles DALMAS  wrote:
>
I did not know much about debug kernel, but when I pass the trace command, I get:
> 
> db> trace
> Tracing pid 0 tid 100000 td 0xc08ba870
> db_trace_self() at db_trace_self
>          pc = 0xc04eba6c  lr = 0xc0232780 (db_hex2dec+0x4d8)
>          sp = 0xc08e5750  fp = 0xc08e5768
>         r10 = 0xc08ba1c4
> db_hex2dec() at db_hex2dec+0x4d8
>          pc = 0xc0232780  lr = 0xc02320f0 (db_command_loop+0x2fc)
>          sp = 0xc08e5770  fp = 0xc08e5810
>          r4 = 0x00000000  r5 = 0x00000000
>          r6 = 0x00000063
> db_command_loop() at db_command_loop+0x2fc
>          pc = 0xc02320f0  lr = 0xc0231e54 (db_command_loop+0x60)
>          sp = 0xc08e5818  fp = 0xc08e5828
>          r4 = 0xc0528609  r5 = 0xc0540c1c
>          r6 = 0xc08ba1b0  r7 = 0xc08e5a48
>          r8 = 0x00000001  r9 = 0xc05d2918
>         r10 = 0xc0615aa4
> db_command_loop() at db_command_loop+0x60
>          pc = 0xc0231e54  lr = 0xc023481c (X_db_symbol_values+0x250)
>          sp = 0xc08e5830  fp = 0xc08e5950
>          r4 = 0x00000000  r5 = 0xc08ba1bc
>          r6 = 0xc0615ac8
> X_db_symbol_values() at X_db_symbol_values+0x250
>          pc = 0xc023481c  lr = 0xc0352c88 (kdb_trap+0x15c)
>          sp = 0xc08e5958  fp = 0xc08e5978
>          r4 = 0x00000000  r5 = 0x00000005
>          r6 = 0xc0615ac8  r7 = 0xc08e5a48
> kdb_trap() at kdb_trap+0x15c
>          pc = 0xc0352c88  lr = 0xc050138c (data_abort_handler+0x680)
>          sp = 0xc08e5980  fp = 0xc08e5998
>          r4 = 0xc08e5a48  r5 = 0x00000005
>          r6 = 0x600001d3  r7 = 0x00000000
>          r8 = 0x00000013  r9 = 0xc08e5a48
>         r10 = 0x00000001
> data_abort_handler() at data_abort_handler+0x680
>          pc = 0xc050138c  lr = 0xc0501134 (data_abort_handler+0x428)
>          sp = 0xc08e59a0  fp = 0xc08e5a40
>          r4 = 0xc08e5eb0  r5 = 0xc08ba870
>          r6 = 0xc08ba548  r7 = 0x00000005
> data_abort_handler() at data_abort_handler+0x428
>          pc = 0xc0501134  lr = 0xc04ed754 (exception_exit)
>          sp = 0xc08e5a48  fp = 0xc08e5ab0
>          r4 = 0xc3b49f00  r5 = 0xc3b4a080
>          r6 = 0xc3b4a0b8  r7 = 0x00000000
>          r8 = 0xc056b038  r9 = 0xc3ae1700
>         r10 = 0xc05d4930
> exception_exit() at exception_exit
>          pc = 0xc04ed754  lr = 0xc024e0f0 (mii_phy_flowstatus+0x2080)
>          sp = 0xc08e5a98  fp = 0xc08e5ab0
>          r0 = 0x00000000  r1 = 0xc0547c85
>          r2 = 0x00000072  r3 = 0x00000008
>          r4 = 0xc3b49f00  r5 = 0xc3b4a080
>          r6 = 0xc3b4a0b8  r7 = 0x00000000
>          r8 = 0xc056b038  r9 = 0xc3ae1700
>         r10 = 0xc05d4930 r12 = 0x00000000
> strcmp() at strcmp+0x4
>          pc = 0xc03d7604  lr = 0xc024e0f0 (mii_phy_flowstatus+0x2080)
>          sp = 0xc08e5a98  fp = 0xc08e5ab0
> Unwind failure (no registers changed)
>

>
Please try without emac driver. MII in Cubietruck could be different.
>

> 
Ganbold

> 

> 
 

> 
> 
>  
> 
> > Message du 20/09/14 15:13
> > De : "Boris Astardzhiev"
> > A : "Gilles DALMAS"
> > Copie à : freebsd-arm at freebsd.org
> > Objet : Re: kernel debugger on cubietruck
> >
> >
> > Hi,
> 
> > As far as I see strcmp() is passed a NULL pointer, try issuing a backtrace to get the exact place of calling.
> 
> > Regards
> 
> 

On Sep 20, 2014 4:11 PM, "Gilles DALMAS"  wrote:
> 
> hi,
> >
> >  
> >
> > I would compile freebsd for it run on a cubietruck. For this I used the wiki page: https://wiki.freebsd.org/FreeBSD/arm/Cubieboard using option confifuration "CUBIEBOARD2." everything goes well, but starting on the "truck", I get this message:
> >
> >  
> >
> > vm_fault(0xc08bab80, 0, 1, 0) -> 1
> > Fatal kernel mode data abort: 'Translation Fault (S)'
> > trapframe: 0xc08e5a48
> > FSR=00000005, FAR=00000000, spsr=a00001d3
> > r0 =00000000, r1 =c0547c85, r2 =00000072, r3 =00000008
> > r4 =c3b49f00, r5 =c3b4a080, r6 =c3b4a0b8, r7 =00000000
> > r8 =c056b038, r9 =c3ae1700, r10=c05d4930, r11=c08e5ab0
> > r12=00000000, ssp=c08e5a98, slr=c024e0f0, pc =c03d7604
> >
> > [ thread pid 0 tid 100000 ]
> > Stopped at      strcmp+0x4:     ldrb    r3, [r0]
> >
> >
> >
> > where is the problem please ?
> >
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