Re: [avr-gcc-list] Bootloader again ;(((

[Jason Kyle]

At 07:39 14/04/2003 +0200, address@hidden wrote:
> Hi guys,
>
> I'm a newbie to the list, although I've tried to search the archive for 
> cure for
> my problems.
> I'm implementing a bootloader for my ATmega8. I've programmed the boot 
> configuration
> bits (i.e.BOOTRST, BOOTSZx). I've also relocated the application to 0x1800 
> with
> -Ttext 0x1800.

Try adding the linker flag --section-start=.text=0x1800 , this is all you 
need to do.

Jason Kyle


> What else do I need? Do I have to relocate other sections as well?
> Currently my code (which compiles just fine, .MAP tells me that addresses 
> are relocated
> also) seems to be good, but the code does not want to execute (I mean I 
> don't even get
> to the very first byte of my code in main()).
> Could anyone tell me in details how to relocate (since the avr-libc user's 
> guide do not
> tell much about APPLICATION relocation)???
> I also have some problems with -fPIC. I wanted to use fixed (not relative) 
> calls to my
> functions. Since it did not work, I had to "install" a function pointer 
> table ;((((
> so that to be able to use the functions already implemented in the 
> bootstrap (kinda
> "shared" library stuff). How shall I use it?
> Thanks a lot!
> Cheers,
>
> t.