I was seeing crashes shortly after calling flash_unique_id, and found that the asm code uses r5 and r7 without declaring them as clobbered.
(r7 is likely not a practical issue because as the frame pointer, the function prologue always saves it, but just to be safe I added a push/pop because it can't be marked as a regular clobber)
I was seeing crashes shortly after calling
flash_unique_id, and found that the asm code uses r5 and r7 without declaring them as clobbered.(r7 is likely not a practical issue because as the frame pointer, the function prologue always saves it, but just to be safe I added a push/pop because it can't be marked as a regular clobber)