Re: [avr-gcc-list] jmp boot loader

[Yannick PODGORSKI]

Thanks Matthias but it doesn't work for me.
I have this error at line of my rjmp app_start :
   bootldr.o(.text+0x280): In function `BootLoader':
   /home/avr-boot2/bootldr.c:315: relocation truncated to fit: 
R_AVR_13_PCREL no symbol
   make: *** [main.elf] Erreur 1
I can't use the rjmp and it doesn't work with the jmp.
I can't jump to an other section at all. It's very strange.
I stop all the interrupts by cli() before and nothing different.
Maybe there is a problem with interrupt vectors.
I continue.

Thanks.

Yannick PODGORSKI

----- Original Message ----- 
From: "Matthias Weißer" <address@hidden>
To: "Yannick PODGORSKI" <address@hidden>
Sent: Thursday, December 30, 2004 9:42 PM
Subject: Re: [avr-gcc-list] jmp boot loader


> Yannick PODGORSKI schrieb:
> > asm volatile ("jmp 0"); // to start application but It restarts to boot 
> > section (not application section).
>
> I had similar problems with a Mega8 bootloader and solved it (with some 
> hints by Joerg Wunsch) this way:
>
> Replaced
> asm volatile("rjmp 0");
> with
> asm volatile("rjmp app_start");
>
> and defined a linker symbol "app_start" at the linker command line:
> -Wl,...,--defsym=app_start=0
>
> Worked for me.
>
> --
> Matthias Weißer
> address@hidden
> http://www.matwei.de