#include <avr/pgmspace.h>

__asm__ (
  " .global	arr"				"\n\t"
  " .section	.progmem.data,\"a\",@progbits"	"\n\t"
  "arr: "					"\n\t"
  ".set i,0"					"\n\t"
  " .rept 256" 					"\n\t"
  " .byte i"					"\n\t"
  "   .set i, i+1"				"\n\t"
  " .endr"
);

extern prog_char arr[];

char foo(unsigned char i)
{
	return pgm_read_byte( &arr[i]);
}