objcopy problem with tic4x architecture
Svein E. Seldal
Svein.Seldal@solidas.com
Sat Mar 15 11:44:00 GMT 2003
Aschwin Gopalan wrote:
> I try to produce a binary file (to loaded into the dsp) using
> objcopy from a coff2-c4x fully linked object file. As soon as I use
> -O binary (or any of the Hex output formats) the following happens:
> The Adresses in the coff file are addressing 32-bit wide memory. The
> adresses are put directly into the output file, but without multiplying
> them by four to address the correct *byte* in the file, resulting in
> overlapping sections. What should I do?
>
Hi,
Do you have a simple testcase to prove your point, please?
The problem with tic4x has always been that it is unaware of bytes. The
host must use 4 native storeage elements (i.e. bytes) to store one of
the target's native storeage element (i.e. a 32-bit word). This problem
arises when you are working with the output formats, like you do. Should
they apply to the host, i.e. multiply the addresses with four, or should
they apply to the target, like they do today. Beacause if you are to
flash this binary image (or ihex for that matter) into a 32-bits flash
which is connected to the DSP, well, then the image is correct AFAICS.
The same applies to your question about gdb; getting a gdb patch up and
running is simple enough - but the main gdb requres a lot of changes as
the host is byte addressable, while the target is 32-bit addressable. As
for your question; no I do not have any working source. I plan on make
one, but I'm too busy at the moment.
Regards,
Svein
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