For some reason, when I give these two variables the "used" attribute, the compiler makes them 8 bytes long. Without it, the compiler optimizes them away as I don't use them (yet). Anyone knows why this is? And are any workarounds for this known?
__attribute__ ((used,section(".booter_version"))) static uint32_t BooterVersion = 2;
__attribute__ ((used,section(".hardware_version"))) static uint32_t HardwareVersion = 3;
Linkerscript part with these sections:
/* booter version number is placed at the second last 4 bytes of program mem for the booter*/
.BooterVersion _BOOTER_VERSION_ADDRESS :
{
KEEP (*(.booter_version))
} >kseg0_program_mem
/* hardware version number is placed at the end of program mem for the booter */
.HardwareVersion _HARDWARE_VERSION_ADDRESS :
{
KEEP (*(.hardware_version))
} >kseg0_program_mem
Image from the memory map after compiling (in program mem, you see the last two lines for these):
