[ECOS] Debugging arm-eabi - no stack frame?

[Stanislav Meduna <stano@meduna.org>]

Hi,

I am trying to debug an ARM9 code compiled using arm-eabi-*
compilers installed with ecos 3.0 release. The code is
running in a skyeye emulator and is using its gdbserver.
As I don't have the real hardware, I am not able to test
how the internal eCos gdb support works - anyway,
I'd like to be able to debug the eCos kernel itself.

I am unable to do any backtraces (the emulator barfs
at trying to access adresses 0xfffffffc - f).

If I understand this correctly, the gdb expects r11 as
the frame pointer. However, this register is null -
no wonder this does not work.

Specifying -mapcs-frame and/or -fno-omit-frame-pointer
does not help.

Is this a known problem?

$ arm-eabi-gcc -v
Using built-in specs.
Target: arm-eabi
Configured with: /gnutools/src/toolchains/gcc/gcc-4.3.2/configure -v
--target=arm-eabi --prefix=/gnutools/builds/toolchains/arm-eabi/tools
--with-newlib --with-gnu-as --with-gnu-ld --enable-languages=c,c++
--disable-__cxa_atexit --enable-threads
--with-bugurl=http://bugs.ecos.sourceware.org/
--with-pkgversion='eCosCentric GNU tools 4.3.2-sw'
--with-cpu=arm7tdmi
Thread model: single
gcc version 4.3.2 (eCosCentric GNU tools 4.3.2-sw)

$ arm-eabi-gdb -v
GNU gdb (eCosCentric GNU tools 4.3.2-sw) 6.8.50.20080706
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "--host=i686-pc-cygwin --target=arm-eabi".
For bug reporting instructions, please see:
<http://bugs.ecos.sourceware.org/>.


eCos v3.0 Template: Samsung ARM9/SMDK2410 development board

Thanks
-- 
                                       Stano

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