[avr-gcc-list] Local data & stack pointer questions

[Marko Panger]

Hello all !

 

I was wondering If GCC uses Y pointer alwasy as a stack frame pointer for data which is allocated locally in a function (with or without "naked" attribute) ?

 

 

Example:

 

void Test(void) __attribute__ ((naked));

 

void Test(void)

{

    char a;

 

    a =  10;

}

 

Another question is about stack pointer. I noticed that even If I declare my MCU type as atmega103 in my makefile the stack pointer alwasy points to 0x25f, even if atmega has 4k os SRAM ?

 

Any help would be appreciated !

 

marko