[ECOS] Re: ecos with thumb

[Nick Garnett <nickg at ecoscentric dot com>]

It it best to send questions like this to the ecos-discuss
list, to which I have copied this response.

I'm afraid I know very little about how the thumb stuff works, maybe
someone on the list can help.



Beat Morf <beat.morf@duagon.com> writes:

> hi nick
> 
> I have a little problem with my hardware, hope you can help me!
> 
> I work with eCos and MicroMonitor as bootloader - all work well and I
> am quite happy. Because I have not very much of flash and ram, I tried
> to compile my applications in thumb-mode (with -mthumb and
> -mthumb-interwork).
> First of all I compiled the eCos implemented test-applications. It
> worked until the test dhrystone - I think you wrote something in the
> mailing list?!
> Anyway, the tests before the dhrystone are compiled and I can test them.
> 
> Now, some are good, some are bad because of a SIGTRAP in misc.cxx
> (105), clock.cxx (86) or kapi.cxx (113).
> I will give you the output of the test-application <clock0>:
> 
> **** begin gdb-output ****
> Run started
> (gdb) set remote memory-write-packet-size 1024
> set remote memory-write-packet-size 1024
> (gdb) set height 0
> set height 0
> (gdb) set debug remote 0
> set debug remote 0
> (gdb) target remote 192.168.0.23:8888
> target remote 192.168.0.23:8888
> Remote debugging using 192.168.0.23:8888
> 0x00000000 in ?? ()
> (gdb) load
> load
> Loading section .rom_vectors, size 0x40 lma 0x2080000
> Loading section .text, size 0x8344 lma 0x2080040
> Loading section .rodata, size 0xd44 lma 0x2088384
> Loading section .data, size 0x528 lma 0x20890c8
> Start address 0x2080040, load size 38384
> Transfer rate: 102357 bits/sec, 498 bytes/write.
> (gdb) break cyg_test_exit
> break cyg_test_exit
> Breakpoint 1 at 0x2082b8a: file
> /opt/ecos/ecos-2.0/packages/infra/v2_0/src/tcdiag.cxx, line 260.
> (gdb) break cyg_assert_fail
> break cyg_assert_fail
> Function "cyg_assert_fail" not defined.
> (gdb) break cyg_test_init
> break cyg_test_init
> Breakpoint 2 at 0x2082aec: file
> /opt/ecos/ecos-2.0/packages/infra/v2_0/src/tcdiag.cxx, line 192.
> (gdb) cont
> cont
> Continuing.
> 
> Program received signal SIGTRAP, Trace/breakpoint trap.
> Cyg_Counter (this=0x208aa68, incr=1)
>     at /opt/ecos/ecos-2.0/packages/kernel/v2_0/src/common/clock.cxx:86
> 86    {
> (gdb) set cyg_test_is_simulator=0
> set cyg_test_is_simulator=0
> Address of symbol "cyg_test_is_simulator" is unknown.
> (gdb) cont
> cont
> Continuing.
> 
> Program received signal SIGTRAP, Trace/breakpoint trap.
> Cyg_Counter (this=0x208aa68, incr=1)
>     at /opt/ecos/ecos-2.0/packages/kernel/v2_0/src/common/clock.cxx:86
> 86    {
> (gdb) bt
> bt
> #0  Cyg_Counter (this=0x208aa68, incr=1)
>     at /opt/ecos/ecos-2.0/packages/kernel/v2_0/src/common/clock.cxx:86
> #1  0x02082e86 in Cyg_Clock (this=0x208aa68, res=
>       {dividend = 1600000000, divisor = 100})
>     at /opt/ecos/ecos-2.0/packages/kernel/v2_0/src/common/clock.cxx:482
> #2  0x0208357c in Cyg_RealTimeClock (this=0x208aa68)
>     at /opt/ecos/ecos-2.0/packages/kernel/v2_0/src/common/clock.cxx:866
> Cannot access memory at address 0xe59ff010
> (gdb) Run complete
> **** end gdb-output ****
> 
> I will give you the list of all tests with an error (until dhrystone):
> SIGTRAP in misc.cxx at line 105:
>  - cxxsupp
> SIGTRAP in clock.css at line 86
>  - clock0
>  - clock1
>  - clockcnv
>  - clocktruth
>  - flag1
>  - mbox1
>  - mutex3
> SIGTRAP in kapi.cxx at line 113
>  - kclock1
>  - kexept1
>  - kflag0
>  - kinter0
>  - klock
>  - kmbox1
>  - kmutex1
>  - kmutex3 (kapi.cxx at line 119)
>  - kmutex4 (kapi.cxx at line 119)
>  - ksched1
>  - ksem1
>  - thread_gdb
>  - timeslice
>  - tm_basic (kapi.cxx at line 119)
>  - fptest
> 
> The other tests until dhrystone worked well without an error!
> 
> Perhaps you can help me - would be great!
> 
> Thanks
> Beat
> 
> 

-- 
Nick Garnett                    eCos Kernel Architect
http://www.ecoscentric.com      The eCos and RedBoot experts


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