dereference_kernel_function_descriptor
return (unsigned long)dereference_kernel_function_descriptor(fn) == pc;
PPC_LI64(_R12, dereference_kernel_function_descriptor(bpf_stf_barrier));
void *dereference_kernel_function_descriptor(void *ptr);
ptr = dereference_kernel_function_descriptor(ptr);
return dereference_kernel_function_descriptor(__kretprobe_trampoline);
unsigned long return_handler = (unsigned long)dereference_kernel_function_descriptor(return_to_handler);
unsigned long return_handler = (unsigned long)dereference_kernel_function_descriptor(return_to_handler);