2 # Makefile for the linux kernel.
5 obj-y = fork.o exec_domain.o panic.o \
6 cpu.o exit.o softirq.o resource.o \
7 sysctl.o sysctl_binary.o capability.o ptrace.o user.o \
8 signal.o sys.o kmod.o workqueue.o pid.o task_work.o \
10 kthread.o sys_ni.o nsproxy.o \
11 notifier.o ksysfs.o cred.o reboot.o \
12 async.o range.o smpboot.o
14 obj-$(CONFIG_MULTIUSER) += groups.o
16 ifdef CONFIG_FUNCTION_TRACER
17 # Do not trace debug files and internal ftrace files
18 CFLAGS_REMOVE_cgroup-debug.o = $(CC_FLAGS_FTRACE)
19 CFLAGS_REMOVE_irq_work.o = $(CC_FLAGS_FTRACE)
22 # cond_syscall is currently not LTO compatible
23 CFLAGS_sys_ni.o = $(DISABLE_LTO)
33 obj-$(CONFIG_CHECKPOINT_RESTORE) += kcmp.o
34 obj-$(CONFIG_FREEZER) += freezer.o
35 obj-$(CONFIG_PROFILING) += profile.o
36 obj-$(CONFIG_STACKTRACE) += stacktrace.o
38 obj-$(CONFIG_FUTEX) += futex.o
39 ifeq ($(CONFIG_COMPAT),y)
40 obj-$(CONFIG_FUTEX) += futex_compat.o
42 obj-$(CONFIG_GENERIC_ISA_DMA) += dma.o
43 obj-$(CONFIG_SMP) += smp.o
44 ifneq ($(CONFIG_SMP),y)
47 obj-$(CONFIG_UID16) += uid16.o
48 obj-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += system_keyring.o system_certificates.o
49 obj-$(CONFIG_MODULES) += module.o
50 obj-$(CONFIG_MODULE_SIG) += module_signing.o
51 obj-$(CONFIG_KALLSYMS) += kallsyms.o
52 obj-$(CONFIG_BSD_PROCESS_ACCT) += acct.o
53 obj-$(CONFIG_KEXEC) += kexec.o
54 obj-$(CONFIG_BACKTRACE_SELF_TEST) += backtracetest.o
55 obj-$(CONFIG_COMPAT) += compat.o
56 obj-$(CONFIG_CGROUPS) += cgroup.o
57 obj-$(CONFIG_CGROUP_FREEZER) += cgroup_freezer.o
58 obj-$(CONFIG_CPUSETS) += cpuset.o
59 obj-$(CONFIG_UTS_NS) += utsname.o
60 obj-$(CONFIG_USER_NS) += user_namespace.o
61 obj-$(CONFIG_PID_NS) += pid_namespace.o
62 obj-$(CONFIG_IKCONFIG) += configs.o
63 obj-$(CONFIG_SMP) += stop_machine.o
64 obj-$(CONFIG_KPROBES_SANITY_TEST) += test_kprobes.o
65 obj-$(CONFIG_AUDIT) += audit.o auditfilter.o
66 obj-$(CONFIG_AUDITSYSCALL) += auditsc.o
67 obj-$(CONFIG_AUDIT_WATCH) += audit_watch.o
68 obj-$(CONFIG_AUDIT_TREE) += audit_tree.o
69 obj-$(CONFIG_GCOV_KERNEL) += gcov/
70 obj-$(CONFIG_KPROBES) += kprobes.o
71 obj-$(CONFIG_KGDB) += debug/
72 obj-$(CONFIG_DETECT_HUNG_TASK) += hung_task.o
73 obj-$(CONFIG_LOCKUP_DETECTOR) += watchdog.o
74 obj-$(CONFIG_SECCOMP) += seccomp.o
75 obj-$(CONFIG_RELAY) += relay.o
76 obj-$(CONFIG_SYSCTL) += utsname_sysctl.o
77 obj-$(CONFIG_TASK_DELAY_ACCT) += delayacct.o
78 obj-$(CONFIG_TASKSTATS) += taskstats.o tsacct.o
79 obj-$(CONFIG_TRACEPOINTS) += tracepoint.o
80 obj-$(CONFIG_LATENCYTOP) += latencytop.o
81 obj-$(CONFIG_BINFMT_ELF) += elfcore.o
82 obj-$(CONFIG_COMPAT_BINFMT_ELF) += elfcore.o
83 obj-$(CONFIG_BINFMT_ELF_FDPIC) += elfcore.o
84 obj-$(CONFIG_FUNCTION_TRACER) += trace/
85 obj-$(CONFIG_TRACING) += trace/
86 obj-$(CONFIG_TRACE_CLOCK) += trace/
87 obj-$(CONFIG_RING_BUFFER) += trace/
88 obj-$(CONFIG_TRACEPOINTS) += trace/
89 obj-$(CONFIG_IRQ_WORK) += irq_work.o
90 obj-$(CONFIG_CPU_PM) += cpu_pm.o
91 obj-$(CONFIG_BPF) += bpf/
93 obj-$(CONFIG_PERF_EVENTS) += events/
95 obj-$(CONFIG_USER_RETURN_NOTIFIER) += user-return-notifier.o
96 obj-$(CONFIG_PADATA) += padata.o
97 obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
98 obj-$(CONFIG_JUMP_LABEL) += jump_label.o
99 obj-$(CONFIG_CONTEXT_TRACKING) += context_tracking.o
100 obj-$(CONFIG_TORTURE_TEST) += torture.o
102 $(obj)/configs.o: $(obj)/config_data.h
104 # config_data.h contains the same information as ikconfig.h but gzipped.
105 # Info from config_data can be extracted from /proc/config*
106 targets += config_data.gz
107 $(obj)/config_data.gz: $(KCONFIG_CONFIG) FORCE
108 $(call if_changed,gzip)
110 filechk_ikconfiggz = (echo "static const char kernel_config_data[] __used = MAGIC_START"; cat $< | scripts/basic/bin2c; echo "MAGIC_END;")
111 targets += config_data.h
112 $(obj)/config_data.h: $(obj)/config_data.gz FORCE
113 $(call filechk,ikconfiggz)
115 ###############################################################################
117 # Roll all the X.509 certificates that we can find together and pull them into
118 # the kernel so that they get loaded into the system trusted keyring during
121 # We look in the source root and the build root for all files whose name ends
122 # in ".x509". Unfortunately, this will generate duplicate filenames, so we
123 # have make canonicalise the pathnames and then sort them to discard the
126 ###############################################################################
127 ifeq ($(CONFIG_SYSTEM_TRUSTED_KEYRING),y)
128 X509_CERTIFICATES-y := $(wildcard *.x509) $(wildcard $(srctree)/*.x509)
129 X509_CERTIFICATES-$(CONFIG_MODULE_SIG) += $(objtree)/signing_key.x509
130 X509_CERTIFICATES-raw := $(sort $(foreach CERT,$(X509_CERTIFICATES-y), \
131 $(or $(realpath $(CERT)),$(CERT))))
132 X509_CERTIFICATES := $(subst $(realpath $(objtree))/,,$(X509_CERTIFICATES-raw))
134 ifeq ($(X509_CERTIFICATES),)
135 $(warning *** No X.509 certificates found ***)
138 ifneq ($(wildcard $(obj)/.x509.list),)
139 ifneq ($(shell cat $(obj)/.x509.list),$(X509_CERTIFICATES))
140 $(info X.509 certificate list changed)
141 $(shell rm $(obj)/.x509.list)
145 kernel/system_certificates.o: $(obj)/x509_certificate_list
147 quiet_cmd_x509certs = CERTS $@
148 cmd_x509certs = cat $(X509_CERTIFICATES) /dev/null >$@ $(foreach X509,$(X509_CERTIFICATES),; $(kecho) " - Including cert $(X509)")
150 targets += $(obj)/x509_certificate_list
151 $(obj)/x509_certificate_list: $(X509_CERTIFICATES) $(obj)/.x509.list
152 $(call if_changed,x509certs)
154 targets += $(obj)/.x509.list
156 @echo $(X509_CERTIFICATES) >$@
159 clean-files := x509_certificate_list .x509.list
161 ifeq ($(CONFIG_MODULE_SIG),y)
162 ###############################################################################
164 # If module signing is requested, say by allyesconfig, but a key has not been
165 # supplied, then one will need to be generated to make sure the build does not
166 # fail and that the kernel may be used afterwards.
168 ###############################################################################
169 ifndef CONFIG_MODULE_SIG_HASH
170 $(error Could not determine digest type to use from kernel config)
173 signing_key.priv signing_key.x509: x509.genkey
175 @echo "### Now generating an X.509 key pair to be used for signing modules."
177 @echo "### If this takes a long time, you might wish to run rngd in the"
178 @echo "### background to keep the supply of entropy topped up. It"
179 @echo "### needs to be run as root, and uses a hardware random"
180 @echo "### number generator if one is available."
182 openssl req -new -nodes -utf8 -$(CONFIG_MODULE_SIG_HASH) -days 36500 \
183 -batch -x509 -config x509.genkey \
184 -outform DER -out signing_key.x509 \
185 -keyout signing_key.priv 2>&1
187 @echo "### Key pair generated."
191 @echo Generating X.509 key generation config
192 @echo >x509.genkey "[ req ]"
193 @echo >>x509.genkey "default_bits = 4096"
194 @echo >>x509.genkey "distinguished_name = req_distinguished_name"
195 @echo >>x509.genkey "prompt = no"
196 @echo >>x509.genkey "string_mask = utf8only"
197 @echo >>x509.genkey "x509_extensions = myexts"
199 @echo >>x509.genkey "[ req_distinguished_name ]"
200 @echo >>x509.genkey "O = Magrathea"
201 @echo >>x509.genkey "CN = Glacier signing key"
202 @echo >>x509.genkey "emailAddress = slartibartfast@magrathea.h2g2"
204 @echo >>x509.genkey "[ myexts ]"
205 @echo >>x509.genkey "basicConstraints=critical,CA:FALSE"
206 @echo >>x509.genkey "keyUsage=digitalSignature"
207 @echo >>x509.genkey "subjectKeyIdentifier=hash"
208 @echo >>x509.genkey "authorityKeyIdentifier=keyid"