AVR-Chat

Larry,

    Thanks for the reply. I am using the latest winavr (20040720) and 
the latest avr studio. I think I found a solution to my problem, but I 
am still testing it.

This thread provides a new parser dll for dwarf.

http://www.avrfreaks.org/phpBB2/viewtopic.php?t=23276&highlight=libelfdwarfparser&sid=f59b47353ba104c20921f5f43f39a4cf

-jr



Larry Barello wrote:

> The latest winavr has the elf/dwarf support.  It is new.  You probably
> should direct these questions to the avr-gcc-list (http://avr1.org) 
> <http://avr1.org%29>  One way
> around this is to use the previous versions avr-coff and avr-coff-ext 
> output
> formats.  The latter works pretty well with studio 4.xxx allowing most
> structs to be displayed.
>
> -----Original Message-----
> From: James Russo [mailto:jr@halo3.net]
> Sent: Tuesday, October 05, 2004 6:16 AM
> To: AVR-Chat@yahoogroups.com
> Subject: Re: [AVR-Chat] malloc/heap issues?
>
>
>
> Replying to my own email... But I found out more information...
>
> If the following statement is included the problem occurs:
>
> char *my_packet_types[]
>     = {"unk","ping","pong","unk","unk","ack","nak","eeread","eeresp",
>         "alive","eedetailsreq","eedetailsresp","updaterp",
>         "esensordata","sensordata","reset"};
>
> I can easily reproduce the problem by just watching the
> __malloc_heap_start variables in either the avr simulator or using the
> jtag-ice on the hardware.  It seems like the DATA is somehow becoming
> corrupt when loading the default values from program memory. That is how
> it works, right? The initialized values are loaded from program memory
> in one of the .init sections.. When the above piece of code is included,
> somehow my sram contains various strings from the AVRStudio like
> "Loading Program Memory", but in double byte format (unicode?). I see
> the same data in the program memory, at the end of the program. So the
> program memory is somehow not getting the right value and this is then
> being copied to SRAM...
>
> In the process of writing this email, I think I found it might be a
> ELF/dwarf-2 problem. It happens with the .elf file in avr studio, but
> not the .hex file from the same build. I was trying to use GDB and
> simulavr to determine if the problem is in avr studio or in the
> elf/dwarf-2 creation, but didn't get anywhere.
>
> I am willing to provide the .hex and .elf file if someone else would be
> willing to take a look at it.
>
> Thanks!
>
> -jr
>
> James Russo wrote:
>
> > Hello,
> >
> >     Ok, I give up. Spent the last 4 hours on this problem. I have a ~12k
> > application trying to go into a atmega128. I seem to have this problem
> > when this one module is loaded in, malloc starts returning large values
> > greater then the size of ram. Its like it almost thinks that I have 65k
> > of memory installed. Removing the one module seems to solve the
> > problem?  I am using a JTAG-ICE to debug the problem.
> >
> > Here is the avr-size output.
> >
> >    text       data        bss        dec        hex    filename
> >   12426        192        846      13464       3498    main.elf
> >
> > The first address returned should be 192 + 846 + 2 (malloc size).
> >
> > can someone give me a hint?
> >
> > Thanks,
> >
> > -James
> >
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