unsigned long perf_instruction_pointer(struct pt_regs *regs)
{
	unsigned long ip;

	if (TRAP(regs) != 0xf00)
		return regs->nip;	/* not a PMU interrupt */

	ip = mfspr(SPRN_SIAR) + perf_ip_adjust(regs);
 	return ip;
 }

This weakness involves numeric computation errors, such as integer overflows, underflows, or precision losses, which can lead to miscalculations and exploitable behaviors in software.