# SPDX-License-Identifier: GPL-2.0 # Do not instrument the tracer itself: ccflags-remove-$(CONFIG_FUNCTION_TRACER) += $(CC_FLAGS_FTRACE) ifdef CONFIG_FUNCTION_TRACER # Avoid recursion due to instrumentation.KCSAN_SANITIZE := n ifdef CONFIG_FTRACE_SELFTEST# selftest needs instrumentationCFLAGS_trace_selftest_dynamic.o = $(CC_FLAGS_FTRACE)obj-y += trace_selftest_dynamic.oendifendif # Allow some files to be function tracedifdef CONFIG_FUNCTION_SELF_TRACINGCFLAGS_trace_output.o = $(CC_FLAGS_FTRACE)CFLAGS_trace_seq.o = $(CC_FLAGS_FTRACE)CFLAGS_trace_stat.o = $(CC_FLAGS_FTRACE)CFLAGS_tracing_map.o = $(CC_FLAGS_FTRACE)CFLAGS_synth_event_gen_test.o = $(CC_FLAGS_FTRACE)CFLAGS_trace_events.o = $(CC_FLAGS_FTRACE)CFLAGS_trace_syscalls.o = $(CC_FLAGS_FTRACE)CFLAGS_trace_events_filter.o = $(CC_FLAGS_FTRACE)CFLAGS_trace_events_trigger.o = $(CC_FLAGS_FTRACE)CFLAGS_trace_events_synth.o = $(CC_FLAGS_FTRACE)CFLAGS_trace_events_hist.o = $(CC_FLAGS_FTRACE)CFLAGS_trace_events_user.o = $(CC_FLAGS_FTRACE)CFLAGS_trace_dynevent.o = $(CC_FLAGS_FTRACE)endif ifdef CONFIG_FTRACE_STARTUP_TESTCFLAGS_trace_kprobe_selftest.o = $(CC_FLAGS_FTRACE)obj-$(CONFIG_KPROBE_EVENTS) += trace_kprobe_selftest.oendif # If unlikely tracing is enabled, do not trace these filesifdef CONFIG_TRACING_BRANCHESKBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILINGendif # for GCOV coverage profilingifdef CONFIG_GCOV_PROFILE_FTRACEGCOV_PROFILE := yendif # Functions in these files can run from IRQ entry before hardirq context# is visible to KCOV, and produce coverage unrelated to syscall inputs.KCOV_INSTRUMENT_trace_preemptirq.o := nKCOV_INSTRUMENT_trace_irqsoff.o := n CFLAGS_bpf_trace.o := -I$(src) CFLAGS_trace_benchmark.o := -I$(src)CFLAGS_trace_events_filter.o := -I$(src) obj-$(CONFIG_TRACE_CLOCK) += trace_clock.o obj-$(CONFIG_FUNCTION_TRACER) += libftrace.oobj-$(CONFIG_RING_BUFFER) += ring_buffer.oobj-$(CONFIG_RING_BUFFER_BENCHMARK) += ring_buffer_benchmark.o obj-$(CONFIG_TRACING) += trace.oobj-$(CONFIG_TRACING) += trace_output.oobj-$(CONFIG_TRACING) += trace_seq.oobj-$(CONFIG_TRACING) += trace_stat.oobj-$(CONFIG_TRACING) += trace_printk.oobj-$(CONFIG_TRACING) += trace_pid.oobj-$(CONFIG_TRACER_SNAPSHOT) += trace_snapshot.oobj-$(CONFIG_TRACING) += 	pid_list.oobj-$(CONFIG_TRACING_MAP) += tracing_map.oobj-$(CONFIG_PREEMPTIRQ_DELAY_TEST) += preemptirq_delay_test.oobj-$(CONFIG_SYNTH_EVENT_GEN_TEST) += synth_event_gen_test.oobj-$(CONFIG_KPROBE_EVENT_GEN_TEST) += kprobe_event_gen_test.oobj-$(CONFIG_CONTEXT_SWITCH_TRACER) += trace_sched_switch.oobj-$(CONFIG_FUNCTION_TRACER) += trace_functions.oobj-$(CONFIG_PREEMPTIRQ_TRACEPOINTS) += trace_preemptirq.oobj-$(CONFIG_IRQSOFF_TRACER) += trace_irqsoff.oobj-$(CONFIG_PREEMPT_TRACER) += trace_irqsoff.oobj-$(CONFIG_SCHED_TRACER) += trace_sched_wakeup.oobj-$(CONFIG_HWLAT_TRACER) += trace_hwlat.oobj-$(CONFIG_OSNOISE_TRACER) += trace_osnoise.oobj-$(CONFIG_NOP_TRACER) += trace_nop.oobj-$(CONFIG_STACK_TRACER) += trace_stack.oobj-$(CONFIG_MMIOTRACE) += trace_mmiotrace.oobj-$(CONFIG_FUNCTION_GRAPH_TRACER) += trace_functions_graph.oobj-$(CONFIG_TRACE_BRANCH_PROFILING) += trace_branch.oobj-$(CONFIG_BLK_DEV_IO_TRACE) += blktrace.oobj-$(CONFIG_FUNCTION_GRAPH_TRACER) += fgraph.oifeq ($(CONFIG_BLOCK),y)obj-$(CONFIG_EVENT_TRACING) += blktrace.oendifobj-$(CONFIG_EVENT_TRACING) += trace_events.oobj-$(CONFIG_EVENT_TRACING) += trace_export.oobj-$(CONFIG_FTRACE_SYSCALLS) += trace_syscalls.oifeq ($(CONFIG_PERF_EVENTS),y)obj-$(CONFIG_EVENT_TRACING) += trace_event_perf.oendifobj-$(CONFIG_EVENT_TRACING) += trace_events_filter.oobj-$(CONFIG_EVENT_TRACING) += trace_events_trigger.oobj-$(CONFIG_EPROBE_EVENTS) += trace_eprobe.oobj-$(CONFIG_TRACE_EVENT_INJECT) += trace_events_inject.oobj-$(CONFIG_SYNTH_EVENTS) += trace_events_synth.oobj-$(CONFIG_HIST_TRIGGERS) += trace_events_hist.oobj-$(CONFIG_USER_EVENTS) += trace_events_user.oobj-$(CONFIG_BPF_EVENTS) += bpf_trace.oobj-$(CONFIG_KPROBE_EVENTS) += trace_kprobe.oobj-$(CONFIG_TRACEPOINTS) += error_report-traces.oobj-$(CONFIG_TRACEPOINTS) += power-traces.oifeq ($(CONFIG_PM),y)obj-$(CONFIG_TRACEPOINTS) += rpm-traces.oendififeq ($(CONFIG_TRACING),y)obj-$(CONFIG_KGDB_KDB) += trace_kdb.oendifobj-$(CONFIG_DYNAMIC_EVENTS) += trace_dynevent.oobj-$(CONFIG_PROBE_EVENTS) += trace_probe.oobj-$(CONFIG_PROBE_EVENTS_BTF_ARGS) += trace_btf.oobj-$(CONFIG_UPROBE_EVENTS) += trace_uprobe.oobj-$(CONFIG_BOOTTIME_TRACING) += trace_boot.oobj-$(CONFIG_FTRACE_RECORD_RECURSION) += trace_recursion_record.oobj-$(CONFIG_FPROBE) += fprobe.oobj-$(CONFIG_RETHOOK) += rethook.oobj-$(CONFIG_FPROBE_EVENTS) += trace_fprobe.o obj-$(CONFIG_TRACEPOINT_BENCHMARK) += trace_benchmark.oobj-$(CONFIG_RV) += rv/ obj-$(CONFIG_TRACE_REMOTE) += trace_remote.oobj-$(CONFIG_SIMPLE_RING_BUFFER) += simple_ring_buffer.oobj-$(CONFIG_TRACE_REMOTE_TEST) += remote_test.o # simple_ring_buffer is used by the pKVM hypervisor which does not have access# to all kernel symbols. Fail the build if forbidden symbols are found. # Basic compiler and tooling-generated symbols that can safely be left# undefined. Ensure KASAN is enabled to avoid logic that may disable# FORTIFY_SOURCE when KASAN is not enabled. undefsyms_base.o does not# automatically get KASAN flags because it is not linked into vmlinux.targets += undefsyms_base.oKASAN_SANITIZE_undefsyms_base.o := y UNDEFINED_ALLOWLIST = __asan __gcov __kasan __kcsan __hwasan __sancov __sanitizer __tsan __ubsan __msan \		      __aeabi_unwind_cpp __s390_indirect_jump __x86_indirect_thunk simple_ring_buffer \		      $(shell $(NM) -u $(obj)/undefsyms_base.o 2>/dev/null | awk '{print $$2}') quiet_cmd_check_undefined = NM      $<      cmd_check_undefined = \          undefsyms=$$($(NM) -u $< | grep -v $(addprefix -e , $(UNDEFINED_ALLOWLIST)) || true); \          if [ -n "$$undefsyms" ]; then \              echo "Unexpected symbols in $<:" >&2; \              echo "$$undefsyms" >&2; \              false; \          fi; \          touch $@ $(obj)/%.o.checked: $(obj)/%.o $(obj)/undefsyms_base.o FORCE	$(call if_changed,check_undefined) always-$(CONFIG_SIMPLE_RING_BUFFER) += simple_ring_buffer.o.checked libftrace-y := ftrace.o