nobo...@web.de wrote:
in the stackcheck example &_end is used for the stack check
and the comment says that _end is defined by the linker.
Because the heap begins behind the bss segment and grows
towards the stack this seem to mean that stackcheck can only work
if the heap is unused.
Is this right?
yes
if you have a heap (use of malloc/free) then the stack check has to be
done differently. one solution is to preclaculate a lowest allowed
address and put the stackmarker there:
extern unsigned short __stack;
unsigned short *address = (unsigned short *)(__stack-50);
