void doSomething(void) {

	int a = 1, b = 2, c = 3, d = 4, e = 5;
	void *stackp = NULL;

#ifdef _ARM_ARCH_H
	__asm__("mov %[address],r9" : [address]"=r" (stackp)); //r9 is the rfp
#else
	__asm__("mov %%ebp,%[address]" : [address]"=a" (stackp));
	stackp -= 2 * sizeof(int); // two 32-bit values on stack, self && _cmd even though unused for a simple C func?
	stackp -= 6 * sizeof(int); // position at start of stack vars addr range
#endif

	memset(stackp, 0, 6*sizeof(int));

	NSLog(@"a:%d, b:%d, c:%d, d:%d, e:%d", a, b, c, d, e); // should print all ZEROs

}