FETCH_OP_STACK   1139 kernel/trace/trace_kprobe.c 	case FETCH_OP_STACK:
FETCH_OP_STACK    298 kernel/trace/trace_probe.c 				code->op = FETCH_OP_STACK;
FETCH_OP_STACK    230 kernel/trace/trace_uprobe.c 	case FETCH_OP_STACK: