Generating code to execute from ROM?

[Jeff Mock <jeff at mock dot com>]

How do you generate code suitable for execution out of ROM with GCC?  The 
main thing
is that I need a way to link the addresses for initialized data at one location
and put the actual initialization data in another location in such a way that
crt0 can figure out how to copy the initialized data from ROM to RAM.

I suppose there are a lot of ways to do this.  I've seen embedded C compilers
generate code this way or it can be done by a clever linker, etc.  I can't
figure out how to do it with GCC...

thanks,
jeff

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