I want to define a new section in ld script so I can use that for variables which have to keep their values in case of soft resets (like IWDG).
I have done some researches and wrote something like this and added that below the .bss section in ld file.
/* Uninitialized data section into "RAM" Ram type memory */
. = ALIGN(4);
.bss :
{
/* This is used by the startup in order to initialize the .bss secion */
_sbss = .; /* define a global symbol at bss start */
__bss_start__ = _sbss;
*(.bss)
*(.bss*)
*(COMMON)
. = ALIGN(4);
_ebss = .; /* define a global symbol at bss end */
__bss_end__ = _ebss;
} >RAM
/**
* .noinit section - uninitialized data
*/
.noinit (NOLOAD):
{
. = ALIGN(4);
_start_of_noinit = .;
*(.noinit)
*(.noinit.*)
. = ALIGN(4);
_end_of_noinit = .;
} >RAM
/* User_heap_stack section, used to check that there is enough "RAM" Ram type memory left */
._user_heap_stack :
{
. = ALIGN(8);
PROVIDE ( end = . );
PROVIDE ( _end = . );
. = . + _Min_Heap_Size;
. = . + _Min_Stack_Size;
. = ALIGN(8);
} >RAM
I also define this kind of variables in this way:
uint32_t aVeryStableGeniusVariableArray[10] __attribute__ ((section (".noinit")));
As I'm not an expert in ld technics, I just wanted to know if the above code is OK and does not cause any unwanted malfunction.
Actual ld file is attached.
