Re: [avr-gcc-list] Memory section different of .text section

[Yannick PODGORSKI]

Hi,
I saw it in gcc 3.4.2 manual, there is an example.
I use --section-start=.function=0x1D000 and the section is well create.

I use __attribute__ ((section(".function"))) in front of functions and it 
works :
   uint16_t section_fct(void); __attribute__ ((section(".function")))
The function is well put in memory at 0x1D000

I try with variables but it doesn't work :
uint16_t var_section __attribute__ ((section(".function"))) = 0;
The linker doesn't link :-). The error is about "section type conflict".

When I use that :
uint16_t var_section; __attribute__ ((section(".function"))) the variable is 
put in .bss section
because it is not initialized.

Someone knows about it ?
Thanks for help.

Yannick


> Hi,
> I work with an ATMega 128, a stk500 and a hyperterminal.
> I use a boot loader section at the @ 0x1E000 :
> DFLAGS = -Wl,-Ttext=0x1E000 to put all code at this @.
>
> I want to know if it's possible to create a memory section different of 
> .text section
> because I need more memory than 8Kbytes.
> For example, I want to flash 4Kbytes at @ 0x1d000 and never rewrite on it 
> with the boot loader. It is specifically for crc funtions, usart functions 
> that never changes.
>
> I try to use --section=.function=0x1D000 but the main it put at this @.
>
> I saw many topics on forums but none speak about that. I look in the 
> manual and librairies but nothing on this.
> Thanks for help.
>
> Yannick
>
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