kernel/Makefile - linux - Git at Google


            
            # SPDX-License-Identifier: GPL-2.0

            
            #

            
            # Makefile for the linux kernel.

            
            #


            obj-y     = fork.o exec_domain.o exec_state.o panic.o \

            
            	    cpu.o exit.o softirq.o resource.o \

            
            	    sysctl.o capability.o ptrace.o user.o \

            
            	    signal.o sys.o umh.o workqueue.o pid.o task_work.o \

            
            	    extable.o params.o \

            
            	    kthread.o sys_ni.o nsproxy.o nstree.o nscommon.o \

            
            	    notifier.o ksysfs.o cred.o reboot.o \

            
            	    async.o range.o smpboot.o ucount.o regset.o ksyms_common.o


            obj-$(CONFIG_MULTIUSER) += groups.o

            
            obj-$(CONFIG_VHOST_TASK) += vhost_task.o


            ifdef CONFIG_FUNCTION_TRACER

            
            # Do not trace internal ftrace files

            
            CFLAGS_REMOVE_irq_work.o = $(CC_FLAGS_FTRACE)

            
            endif


            # Branch profiling isn't noinstr-safe

            
            ifdef CONFIG_TRACE_BRANCH_PROFILING

            
            CFLAGS_context_tracking.o += -DDISABLE_BRANCH_PROFILING

            
            endif


            # Prevents flicker of uninteresting __do_softirq()/__local_bh_disable_ip()

            
            # in coverage traces.

            
            KCOV_INSTRUMENT_softirq.o := n

            
            # Avoid KCSAN instrumentation in softirq ("No shared variables, all the data

            
            # are CPU local" => assume no data races), to reduce overhead in interrupts.

            
            KCSAN_SANITIZE_softirq.o = n

            
            # These are called from save_stack_trace() on slub debug path,

            
            # and produce insane amounts of uninteresting coverage.

            
            KCOV_INSTRUMENT_extable.o := n

            
            KCOV_INSTRUMENT_stacktrace.o := n

            
            # Don't self-instrument.

            
            KCOV_INSTRUMENT_kcov.o := n

            
            # If sanitizers detect any issues in kcov, it may lead to recursion

            
            # via printk, etc.

            
            KASAN_SANITIZE_kcov.o := n

            
            KCSAN_SANITIZE_kcov.o := n

            
            UBSAN_SANITIZE_kcov.o := n

            
            KMSAN_SANITIZE_kcov.o := n


            CONTEXT_ANALYSIS_kcov.o := y

            
            CFLAGS_kcov.o := $(call cc-option, -fno-conserve-stack) -fno-stack-protector


            obj-y += sched/

            
            obj-y += locking/

            
            obj-y += power/

            
            obj-y += printk/

            
            obj-y += irq/

            
            obj-y += rcu/

            
            obj-y += livepatch/

            
            obj-y += liveupdate/

            
            obj-y += dma/

            
            obj-y += entry/

            
            obj-y += unwind/

            
            obj-$(CONFIG_MODULES) += module/


            obj-$(CONFIG_KCMP) += kcmp.o

            
            obj-$(CONFIG_FREEZER) += freezer.o

            
            obj-$(CONFIG_PROFILING) += profile.o

            
            obj-$(CONFIG_STACKTRACE) += stacktrace.o

            
            obj-y += time/

            
            obj-$(CONFIG_FUTEX) += futex/

            
            obj-$(CONFIG_GENERIC_ISA_DMA) += dma.o

            
            obj-$(CONFIG_SMP) += smp.o

            
            ifneq ($(CONFIG_SMP),y)

            
            obj-y += up.o

            
            endif

            
            obj-$(CONFIG_UID16) += uid16.o

            
            obj-$(CONFIG_MODULE_SIG_FORMAT) += module_signature.o

            
            obj-$(CONFIG_KALLSYMS) += kallsyms.o

            
            obj-$(CONFIG_KALLSYMS_SELFTEST) += kallsyms_selftest.o

            
            obj-$(CONFIG_BSD_PROCESS_ACCT) += acct.o

            
            obj-$(CONFIG_VMCORE_INFO) += vmcore_info.o elfcorehdr.o

            
            obj-$(CONFIG_CRASH_RESERVE) += crash_reserve.o

            
            obj-$(CONFIG_KEXEC_CORE) += kexec_core.o

            
            obj-$(CONFIG_CRASH_DUMP) += crash_core.o

            
            obj-$(CONFIG_CRASH_DM_CRYPT) += crash_dump_dm_crypt.o

            
            obj-$(CONFIG_CRASH_DUMP_KUNIT_TEST) += crash_core_test.o

            
            obj-$(CONFIG_KEXEC) += kexec.o

            
            obj-$(CONFIG_KEXEC_FILE) += kexec_file.o

            
            obj-$(CONFIG_KEXEC_ELF) += kexec_elf.o

            
            obj-$(CONFIG_BACKTRACE_SELF_TEST) += backtracetest.o

            
            obj-$(CONFIG_COMPAT) += compat.o

            
            obj-$(CONFIG_CGROUPS) += cgroup/

            
            obj-$(CONFIG_UTS_NS) += utsname.o

            
            obj-$(CONFIG_USER_NS) += user_namespace.o

            
            obj-$(CONFIG_PID_NS) += pid_namespace.o

            
            obj-$(CONFIG_IKCONFIG) += configs.o

            
            obj-$(CONFIG_IKHEADERS) += kheaders.o

            
            obj-$(CONFIG_SMP) += stop_machine.o

            
            obj-$(CONFIG_AUDIT) += audit.o auditfilter.o

            
            obj-$(CONFIG_AUDITSYSCALL) += auditsc.o audit_watch.o audit_fsnotify.o audit_tree.o

            
            obj-$(CONFIG_GCOV_KERNEL) += gcov/

            
            obj-$(CONFIG_KCOV) += kcov.o

            
            obj-$(CONFIG_KPROBES) += kprobes.o

            
            obj-$(CONFIG_FAIL_FUNCTION) += fail_function.o

            
            obj-$(CONFIG_KGDB) += debug/

            
            obj-$(CONFIG_DETECT_HUNG_TASK) += hung_task.o

            
            obj-$(CONFIG_LOCKUP_DETECTOR) += watchdog.o

            
            obj-$(CONFIG_HARDLOCKUP_DETECTOR_BUDDY) += watchdog_buddy.o

            
            obj-$(CONFIG_HARDLOCKUP_DETECTOR_PERF) += watchdog_perf.o

            
            obj-$(CONFIG_SECCOMP) += seccomp.o

            
            obj-$(CONFIG_RELAY) += relay.o

            
            obj-$(CONFIG_SYSCTL) += utsname_sysctl.o

            
            obj-$(CONFIG_TASK_DELAY_ACCT) += delayacct.o

            
            obj-$(CONFIG_TASKSTATS) += taskstats.o tsacct.o

            
            obj-$(CONFIG_TRACEPOINTS) += tracepoint.o

            
            obj-$(CONFIG_LATENCYTOP) += latencytop.o

            
            obj-$(CONFIG_FUNCTION_TRACER) += trace/

            
            obj-$(CONFIG_TRACING) += trace/

            
            obj-$(CONFIG_TRACE_CLOCK) += trace/

            
            obj-$(CONFIG_RING_BUFFER) += trace/

            
            obj-$(CONFIG_TRACEPOINTS) += trace/

            
            obj-$(CONFIG_RETHOOK) += trace/

            
            obj-$(CONFIG_IRQ_WORK) += irq_work.o

            
            obj-$(CONFIG_CPU_PM) += cpu_pm.o

            
            obj-$(CONFIG_BPF) += bpf/

            
            obj-$(CONFIG_KCSAN) += kcsan/

            
            obj-$(CONFIG_SHADOW_CALL_STACK) += scs.o

            
            obj-$(CONFIG_HAVE_STATIC_CALL) += static_call.o

            
            obj-$(CONFIG_HAVE_STATIC_CALL_INLINE) += static_call_inline.o

            
            obj-$(CONFIG_CFI) += cfi.o


            obj-$(CONFIG_PERF_EVENTS) += events/


            obj-$(CONFIG_USER_RETURN_NOTIFIER) += user-return-notifier.o

            
            obj-$(CONFIG_PADATA) += padata.o

            
            obj-$(CONFIG_JUMP_LABEL) += jump_label.o

            
            obj-$(CONFIG_CONTEXT_TRACKING) += context_tracking.o

            
            obj-$(CONFIG_TORTURE_TEST) += torture.o


            obj-$(CONFIG_HAS_IOMEM) += iomem.o

            
            obj-$(CONFIG_RSEQ) += rseq.o

            
            obj-$(CONFIG_WATCH_QUEUE) += watch_queue.o


            obj-$(CONFIG_RESOURCE_KUNIT_TEST) += resource_kunit.o

            
            obj-$(CONFIG_SYSCTL_KUNIT_TEST) += sysctl-test.o


            CFLAGS_kstack_erase.o += $(DISABLE_KSTACK_ERASE)

            
            CFLAGS_kstack_erase.o += $(call cc-option,-mgeneral-regs-only)

            
            obj-$(CONFIG_KSTACK_ERASE) += kstack_erase.o

            
            KASAN_SANITIZE_kstack_erase.o := n

            
            KCSAN_SANITIZE_kstack_erase.o := n

            
            KCOV_INSTRUMENT_kstack_erase.o := n


            obj-$(CONFIG_SCF_TORTURE_TEST) += scftorture.o


            $(obj)/configs.o: $(obj)/config_data.gz


            targets += config_data config_data.gz

            
            $(obj)/config_data.gz: $(obj)/config_data FORCE

            
            	$(call if_changed,gzip)


            filechk_cat = cat $<


            $(obj)/config_data: $(KCONFIG_CONFIG) FORCE

            
            	$(call filechk,cat)


            # kheaders_data.tar.xz

            
            $(obj)/kheaders.o: $(obj)/kheaders_data.tar.xz


            quiet_cmd_kheaders_data = GEN     $@

            
                  cmd_kheaders_data = "$<" "$@" "$(obj)/kheaders-srclist" "$(obj)/kheaders-objlist" "$(KBUILD_BUILD_TIMESTAMP)"

            
                  cmd_kheaders_data_dep = cat $(depfile) >> $(dot-target).cmd; rm -f $(depfile)


            define rule_kheaders_data

            
            	$(call cmd_and_savecmd,kheaders_data)

            
            	$(call cmd,kheaders_data_dep)

            
            endef


            targets += kheaders_data.tar.xz

            
            $(obj)/kheaders_data.tar.xz: $(src)/gen_kheaders.sh $(obj)/kheaders-srclist $(obj)/kheaders-objlist $(obj)/kheaders.md5 FORCE

            
            	$(call if_changed_rule,kheaders_data)


            # generated headers in objtree

            
            #

            
            # include/generated/utsversion.h is ignored because it is generated

            
            # after gen_kheaders.sh is executed. (utsversion.h is unneeded for kheaders)

            
            filechk_kheaders_objlist = \

            
            	for d in include "arch/$(SRCARCH)/include"; do \

            
            		find "$${d}/generated" ! -path "include/generated/utsversion.h" -a -name "*.h" -print; \

            
            	done


            $(obj)/kheaders-objlist: FORCE

            
            	$(call filechk,kheaders_objlist)


            # non-generated headers in srctree

            
            filechk_kheaders_srclist = \

            
            	for d in include "arch/$(SRCARCH)/include"; do \

            
            		find "$(srctree)/$${d}" -path "$(srctree)/$${d}/generated" -prune -o -name "*.h" -print; \

            
            	done


            $(obj)/kheaders-srclist: FORCE

            
            	$(call filechk,kheaders_srclist)


            # Some files are symlinks. If symlinks are changed, kheaders_data.tar.xz should

            
            # be rebuilt.

            
            filechk_kheaders_md5sum = xargs -r -a $< stat -c %N | md5sum


            $(obj)/kheaders.md5: $(obj)/kheaders-srclist FORCE

            
            	$(call filechk,kheaders_md5sum)


            clean-files := kheaders.md5 kheaders-srclist kheaders-objlist
	# SPDX-License-Identifier: GPL-2.0
	#
	# Makefile for the linux kernel.
	#

	obj-y = fork.o exec_domain.o exec_state.o panic.o \
	cpu.o exit.o softirq.o resource.o \
	sysctl.o capability.o ptrace.o user.o \
	signal.o sys.o umh.o workqueue.o pid.o task_work.o \
	extable.o params.o \
	kthread.o sys_ni.o nsproxy.o nstree.o nscommon.o \
	notifier.o ksysfs.o cred.o reboot.o \
	async.o range.o smpboot.o ucount.o regset.o ksyms_common.o

	obj-$(CONFIG_MULTIUSER) += groups.o
	obj-$(CONFIG_VHOST_TASK) += vhost_task.o

	ifdef CONFIG_FUNCTION_TRACER
	# Do not trace internal ftrace files
	CFLAGS_REMOVE_irq_work.o = $(CC_FLAGS_FTRACE)
	endif

	# Branch profiling isn't noinstr-safe
	ifdef CONFIG_TRACE_BRANCH_PROFILING
	CFLAGS_context_tracking.o += -DDISABLE_BRANCH_PROFILING
	endif

	# Prevents flicker of uninteresting __do_softirq()/__local_bh_disable_ip()
	# in coverage traces.
	KCOV_INSTRUMENT_softirq.o := n
	# Avoid KCSAN instrumentation in softirq ("No shared variables, all the data
	# are CPU local" => assume no data races), to reduce overhead in interrupts.
	KCSAN_SANITIZE_softirq.o = n
	# These are called from save_stack_trace() on slub debug path,
	# and produce insane amounts of uninteresting coverage.
	KCOV_INSTRUMENT_extable.o := n
	KCOV_INSTRUMENT_stacktrace.o := n
	# Don't self-instrument.
	KCOV_INSTRUMENT_kcov.o := n
	# If sanitizers detect any issues in kcov, it may lead to recursion
	# via printk, etc.
	KASAN_SANITIZE_kcov.o := n
	KCSAN_SANITIZE_kcov.o := n
	UBSAN_SANITIZE_kcov.o := n
	KMSAN_SANITIZE_kcov.o := n

	CONTEXT_ANALYSIS_kcov.o := y
	CFLAGS_kcov.o := $(call cc-option, -fno-conserve-stack) -fno-stack-protector

	obj-y += sched/
	obj-y += locking/
	obj-y += power/
	obj-y += printk/
	obj-y += irq/
	obj-y += rcu/
	obj-y += livepatch/
	obj-y += liveupdate/
	obj-y += dma/
	obj-y += entry/
	obj-y += unwind/
	obj-$(CONFIG_MODULES) += module/

	obj-$(CONFIG_KCMP) += kcmp.o
	obj-$(CONFIG_FREEZER) += freezer.o
	obj-$(CONFIG_PROFILING) += profile.o
	obj-$(CONFIG_STACKTRACE) += stacktrace.o
	obj-y += time/
	obj-$(CONFIG_FUTEX) += futex/
	obj-$(CONFIG_GENERIC_ISA_DMA) += dma.o
	obj-$(CONFIG_SMP) += smp.o
	ifneq ($(CONFIG_SMP),y)
	obj-y += up.o
	endif
	obj-$(CONFIG_UID16) += uid16.o
	obj-$(CONFIG_MODULE_SIG_FORMAT) += module_signature.o
	obj-$(CONFIG_KALLSYMS) += kallsyms.o
	obj-$(CONFIG_KALLSYMS_SELFTEST) += kallsyms_selftest.o
	obj-$(CONFIG_BSD_PROCESS_ACCT) += acct.o
	obj-$(CONFIG_VMCORE_INFO) += vmcore_info.o elfcorehdr.o
	obj-$(CONFIG_CRASH_RESERVE) += crash_reserve.o
	obj-$(CONFIG_KEXEC_CORE) += kexec_core.o
	obj-$(CONFIG_CRASH_DUMP) += crash_core.o
	obj-$(CONFIG_CRASH_DM_CRYPT) += crash_dump_dm_crypt.o
	obj-$(CONFIG_CRASH_DUMP_KUNIT_TEST) += crash_core_test.o
	obj-$(CONFIG_KEXEC) += kexec.o
	obj-$(CONFIG_KEXEC_FILE) += kexec_file.o
	obj-$(CONFIG_KEXEC_ELF) += kexec_elf.o
	obj-$(CONFIG_BACKTRACE_SELF_TEST) += backtracetest.o
	obj-$(CONFIG_COMPAT) += compat.o
	obj-$(CONFIG_CGROUPS) += cgroup/
	obj-$(CONFIG_UTS_NS) += utsname.o
	obj-$(CONFIG_USER_NS) += user_namespace.o
	obj-$(CONFIG_PID_NS) += pid_namespace.o
	obj-$(CONFIG_IKCONFIG) += configs.o
	obj-$(CONFIG_IKHEADERS) += kheaders.o
	obj-$(CONFIG_SMP) += stop_machine.o
	obj-$(CONFIG_AUDIT) += audit.o auditfilter.o
	obj-$(CONFIG_AUDITSYSCALL) += auditsc.o audit_watch.o audit_fsnotify.o audit_tree.o
	obj-$(CONFIG_GCOV_KERNEL) += gcov/
	obj-$(CONFIG_KCOV) += kcov.o
	obj-$(CONFIG_KPROBES) += kprobes.o
	obj-$(CONFIG_FAIL_FUNCTION) += fail_function.o
	obj-$(CONFIG_KGDB) += debug/
	obj-$(CONFIG_DETECT_HUNG_TASK) += hung_task.o
	obj-$(CONFIG_LOCKUP_DETECTOR) += watchdog.o
	obj-$(CONFIG_HARDLOCKUP_DETECTOR_BUDDY) += watchdog_buddy.o
	obj-$(CONFIG_HARDLOCKUP_DETECTOR_PERF) += watchdog_perf.o
	obj-$(CONFIG_SECCOMP) += seccomp.o
	obj-$(CONFIG_RELAY) += relay.o
	obj-$(CONFIG_SYSCTL) += utsname_sysctl.o
	obj-$(CONFIG_TASK_DELAY_ACCT) += delayacct.o
	obj-$(CONFIG_TASKSTATS) += taskstats.o tsacct.o
	obj-$(CONFIG_TRACEPOINTS) += tracepoint.o
	obj-$(CONFIG_LATENCYTOP) += latencytop.o
	obj-$(CONFIG_FUNCTION_TRACER) += trace/
	obj-$(CONFIG_TRACING) += trace/
	obj-$(CONFIG_TRACE_CLOCK) += trace/
	obj-$(CONFIG_RING_BUFFER) += trace/
	obj-$(CONFIG_TRACEPOINTS) += trace/
	obj-$(CONFIG_RETHOOK) += trace/
	obj-$(CONFIG_IRQ_WORK) += irq_work.o
	obj-$(CONFIG_CPU_PM) += cpu_pm.o
	obj-$(CONFIG_BPF) += bpf/
	obj-$(CONFIG_KCSAN) += kcsan/
	obj-$(CONFIG_SHADOW_CALL_STACK) += scs.o
	obj-$(CONFIG_HAVE_STATIC_CALL) += static_call.o
	obj-$(CONFIG_HAVE_STATIC_CALL_INLINE) += static_call_inline.o
	obj-$(CONFIG_CFI) += cfi.o

	obj-$(CONFIG_PERF_EVENTS) += events/

	obj-$(CONFIG_USER_RETURN_NOTIFIER) += user-return-notifier.o
	obj-$(CONFIG_PADATA) += padata.o
	obj-$(CONFIG_JUMP_LABEL) += jump_label.o
	obj-$(CONFIG_CONTEXT_TRACKING) += context_tracking.o
	obj-$(CONFIG_TORTURE_TEST) += torture.o

	obj-$(CONFIG_HAS_IOMEM) += iomem.o
	obj-$(CONFIG_RSEQ) += rseq.o
	obj-$(CONFIG_WATCH_QUEUE) += watch_queue.o

	obj-$(CONFIG_RESOURCE_KUNIT_TEST) += resource_kunit.o
	obj-$(CONFIG_SYSCTL_KUNIT_TEST) += sysctl-test.o

	CFLAGS_kstack_erase.o += $(DISABLE_KSTACK_ERASE)
	CFLAGS_kstack_erase.o += $(call cc-option,-mgeneral-regs-only)
	obj-$(CONFIG_KSTACK_ERASE) += kstack_erase.o
	KASAN_SANITIZE_kstack_erase.o := n
	KCSAN_SANITIZE_kstack_erase.o := n
	KCOV_INSTRUMENT_kstack_erase.o := n

	obj-$(CONFIG_SCF_TORTURE_TEST) += scftorture.o

	$(obj)/configs.o: $(obj)/config_data.gz

	targets += config_data config_data.gz
	$(obj)/config_data.gz: $(obj)/config_data FORCE
	$(call if_changed,gzip)

	filechk_cat = cat $<

	$(obj)/config_data: $(KCONFIG_CONFIG) FORCE
	$(call filechk,cat)

	# kheaders_data.tar.xz
	$(obj)/kheaders.o: $(obj)/kheaders_data.tar.xz

	quiet_cmd_kheaders_data = GEN $@
	cmd_kheaders_data = "$<" "$@" "$(obj)/kheaders-srclist" "$(obj)/kheaders-objlist" "$(KBUILD_BUILD_TIMESTAMP)"
	cmd_kheaders_data_dep = cat $(depfile) >> $(dot-target).cmd; rm -f $(depfile)

	define rule_kheaders_data
	$(call cmd_and_savecmd,kheaders_data)
	$(call cmd,kheaders_data_dep)
	endef

	targets += kheaders_data.tar.xz
	$(obj)/kheaders_data.tar.xz: $(src)/gen_kheaders.sh $(obj)/kheaders-srclist $(obj)/kheaders-objlist $(obj)/kheaders.md5 FORCE
	$(call if_changed_rule,kheaders_data)

	# generated headers in objtree
	#
	# include/generated/utsversion.h is ignored because it is generated
	# after gen_kheaders.sh is executed. (utsversion.h is unneeded for kheaders)
	filechk_kheaders_objlist = \
	for d in include "arch/$(SRCARCH)/include"; do \
	find "$${d}/generated" ! -path "include/generated/utsversion.h" -a -name "*.h" -print; \
	done

	$(obj)/kheaders-objlist: FORCE
	$(call filechk,kheaders_objlist)

	# non-generated headers in srctree
	filechk_kheaders_srclist = \
	for d in include "arch/$(SRCARCH)/include"; do \
	find "$(srctree)/$${d}" -path "$(srctree)/$${d}/generated" -prune -o -name "*.h" -print; \
	done

	$(obj)/kheaders-srclist: FORCE
	$(call filechk,kheaders_srclist)

	# Some files are symlinks. If symlinks are changed, kheaders_data.tar.xz should
	# be rebuilt.
	filechk_kheaders_md5sum = xargs -r -a $< stat -c %N \| md5sum

	$(obj)/kheaders.md5: $(obj)/kheaders-srclist FORCE
	$(call filechk,kheaders_md5sum)

	clean-files := kheaders.md5 kheaders-srclist kheaders-objlist