2 # Makefile for the linux kernel.
5 obj-y = fork.o exec_domain.o panic.o \
6 cpu.o exit.o itimer.o time.o softirq.o resource.o \
7 sysctl.o sysctl_binary.o capability.o ptrace.o timer.o user.o \
8 signal.o sys.o kmod.o workqueue.o pid.o task_work.o \
9 extable.o params.o posix-timers.o \
10 kthread.o sys_ni.o posix-cpu-timers.o \
12 notifier.o ksysfs.o cred.o reboot.o \
13 async.o range.o groups.o smpboot.o
15 ifdef CONFIG_FUNCTION_TRACER
16 # Do not trace debug files and internal ftrace files
17 CFLAGS_REMOVE_cgroup-debug.o = -pg
18 CFLAGS_REMOVE_irq_work.o = -pg
29 obj-$(CONFIG_CHECKPOINT_RESTORE) += kcmp.o
30 obj-$(CONFIG_FREEZER) += freezer.o
31 obj-$(CONFIG_PROFILING) += profile.o
32 obj-$(CONFIG_STACKTRACE) += stacktrace.o
34 obj-$(CONFIG_FUTEX) += futex.o
35 ifeq ($(CONFIG_COMPAT),y)
36 obj-$(CONFIG_FUTEX) += futex_compat.o
38 obj-$(CONFIG_GENERIC_ISA_DMA) += dma.o
39 obj-$(CONFIG_SMP) += smp.o
40 ifneq ($(CONFIG_SMP),y)
43 obj-$(CONFIG_UID16) += uid16.o
44 obj-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += system_keyring.o system_certificates.o
45 obj-$(CONFIG_MODULES) += module.o
46 obj-$(CONFIG_MODULE_SIG) += module_signing.o
47 obj-$(CONFIG_KALLSYMS) += kallsyms.o
48 obj-$(CONFIG_BSD_PROCESS_ACCT) += acct.o
49 obj-$(CONFIG_KEXEC) += kexec.o
50 obj-$(CONFIG_BACKTRACE_SELF_TEST) += backtracetest.o
51 obj-$(CONFIG_COMPAT) += compat.o
52 obj-$(CONFIG_CGROUPS) += cgroup.o
53 obj-$(CONFIG_CGROUP_FREEZER) += cgroup_freezer.o
54 obj-$(CONFIG_CPUSETS) += cpuset.o
55 obj-$(CONFIG_UTS_NS) += utsname.o
56 obj-$(CONFIG_USER_NS) += user_namespace.o
57 obj-$(CONFIG_PID_NS) += pid_namespace.o
58 obj-$(CONFIG_IKCONFIG) += configs.o
59 obj-$(CONFIG_RESOURCE_COUNTERS) += res_counter.o
60 obj-$(CONFIG_SMP) += stop_machine.o
61 obj-$(CONFIG_KPROBES_SANITY_TEST) += test_kprobes.o
62 obj-$(CONFIG_AUDIT) += audit.o auditfilter.o
63 obj-$(CONFIG_AUDITSYSCALL) += auditsc.o
64 obj-$(CONFIG_AUDIT_WATCH) += audit_watch.o
65 obj-$(CONFIG_AUDIT_TREE) += audit_tree.o
66 obj-$(CONFIG_GCOV_KERNEL) += gcov/
67 obj-$(CONFIG_KPROBES) += kprobes.o
68 obj-$(CONFIG_KGDB) += debug/
69 obj-$(CONFIG_DETECT_HUNG_TASK) += hung_task.o
70 obj-$(CONFIG_LOCKUP_DETECTOR) += watchdog.o
71 obj-$(CONFIG_SECCOMP) += seccomp.o
72 obj-$(CONFIG_RELAY) += relay.o
73 obj-$(CONFIG_SYSCTL) += utsname_sysctl.o
74 obj-$(CONFIG_TASK_DELAY_ACCT) += delayacct.o
75 obj-$(CONFIG_TASKSTATS) += taskstats.o tsacct.o
76 obj-$(CONFIG_TRACEPOINTS) += tracepoint.o
77 obj-$(CONFIG_LATENCYTOP) += latencytop.o
78 obj-$(CONFIG_BINFMT_ELF) += elfcore.o
79 obj-$(CONFIG_COMPAT_BINFMT_ELF) += elfcore.o
80 obj-$(CONFIG_BINFMT_ELF_FDPIC) += elfcore.o
81 obj-$(CONFIG_FUNCTION_TRACER) += trace/
82 obj-$(CONFIG_TRACING) += trace/
83 obj-$(CONFIG_TRACE_CLOCK) += trace/
84 obj-$(CONFIG_RING_BUFFER) += trace/
85 obj-$(CONFIG_TRACEPOINTS) += trace/
86 obj-$(CONFIG_IRQ_WORK) += irq_work.o
87 obj-$(CONFIG_CPU_PM) += cpu_pm.o
89 obj-$(CONFIG_PERF_EVENTS) += events/
91 obj-$(CONFIG_USER_RETURN_NOTIFIER) += user-return-notifier.o
92 obj-$(CONFIG_PADATA) += padata.o
93 obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
94 obj-$(CONFIG_JUMP_LABEL) += jump_label.o
95 obj-$(CONFIG_CONTEXT_TRACKING) += context_tracking.o
96 obj-$(CONFIG_TORTURE_TEST) += torture.o
98 $(obj)/configs.o: $(obj)/config_data.h
100 # config_data.h contains the same information as ikconfig.h but gzipped.
101 # Info from config_data can be extracted from /proc/config*
102 targets += config_data.gz
103 $(obj)/config_data.gz: $(KCONFIG_CONFIG) FORCE
104 $(call if_changed,gzip)
106 filechk_ikconfiggz = (echo "static const char kernel_config_data[] __used = MAGIC_START"; cat $< | scripts/bin2c; echo "MAGIC_END;")
107 targets += config_data.h
108 $(obj)/config_data.h: $(obj)/config_data.gz FORCE
109 $(call filechk,ikconfiggz)
111 $(obj)/time.o: $(obj)/timeconst.h
113 quiet_cmd_hzfile = HZFILE $@
114 cmd_hzfile = echo "hz=$(CONFIG_HZ)" > $@
117 $(obj)/hz.bc: $(objtree)/include/config/hz.h FORCE
118 $(call if_changed,hzfile)
121 cmd_bc = bc -q $(filter-out FORCE,$^) > $@
123 targets += timeconst.h
124 $(obj)/timeconst.h: $(obj)/hz.bc $(src)/timeconst.bc FORCE
125 $(call if_changed,bc)
127 ###############################################################################
129 # Roll all the X.509 certificates that we can find together and pull them into
130 # the kernel so that they get loaded into the system trusted keyring during
133 # We look in the source root and the build root for all files whose name ends
134 # in ".x509". Unfortunately, this will generate duplicate filenames, so we
135 # have make canonicalise the pathnames and then sort them to discard the
138 ###############################################################################
139 ifeq ($(CONFIG_SYSTEM_TRUSTED_KEYRING),y)
140 X509_CERTIFICATES-y := $(wildcard *.x509) $(wildcard $(srctree)/*.x509)
141 X509_CERTIFICATES-$(CONFIG_MODULE_SIG) += $(objtree)/signing_key.x509
142 X509_CERTIFICATES-raw := $(sort $(foreach CERT,$(X509_CERTIFICATES-y), \
143 $(or $(realpath $(CERT)),$(CERT))))
144 X509_CERTIFICATES := $(subst $(realpath $(objtree))/,,$(X509_CERTIFICATES-raw))
146 ifeq ($(X509_CERTIFICATES),)
147 $(warning *** No X.509 certificates found ***)
150 ifneq ($(wildcard $(obj)/.x509.list),)
151 ifneq ($(shell cat $(obj)/.x509.list),$(X509_CERTIFICATES))
152 $(info X.509 certificate list changed)
153 $(shell rm $(obj)/.x509.list)
157 kernel/system_certificates.o: $(obj)/x509_certificate_list
159 quiet_cmd_x509certs = CERTS $@
160 cmd_x509certs = cat $(X509_CERTIFICATES) /dev/null >$@ $(foreach X509,$(X509_CERTIFICATES),; echo " - Including cert $(X509)")
162 targets += $(obj)/x509_certificate_list
163 $(obj)/x509_certificate_list: $(X509_CERTIFICATES) $(obj)/.x509.list
164 $(call if_changed,x509certs)
166 targets += $(obj)/.x509.list
168 @echo $(X509_CERTIFICATES) >$@
171 clean-files := x509_certificate_list .x509.list
173 ifeq ($(CONFIG_MODULE_SIG),y)
174 ###############################################################################
176 # If module signing is requested, say by allyesconfig, but a key has not been
177 # supplied, then one will need to be generated to make sure the build does not
178 # fail and that the kernel may be used afterwards.
180 ###############################################################################
181 ifndef CONFIG_MODULE_SIG_HASH
182 $(error Could not determine digest type to use from kernel config)
185 signing_key.priv signing_key.x509: x509.genkey
187 @echo "### Now generating an X.509 key pair to be used for signing modules."
189 @echo "### If this takes a long time, you might wish to run rngd in the"
190 @echo "### background to keep the supply of entropy topped up. It"
191 @echo "### needs to be run as root, and uses a hardware random"
192 @echo "### number generator if one is available."
194 openssl req -new -nodes -utf8 -$(CONFIG_MODULE_SIG_HASH) -days 36500 \
195 -batch -x509 -config x509.genkey \
196 -outform DER -out signing_key.x509 \
197 -keyout signing_key.priv 2>&1
199 @echo "### Key pair generated."
203 @echo Generating X.509 key generation config
204 @echo >x509.genkey "[ req ]"
205 @echo >>x509.genkey "default_bits = 4096"
206 @echo >>x509.genkey "distinguished_name = req_distinguished_name"
207 @echo >>x509.genkey "prompt = no"
208 @echo >>x509.genkey "string_mask = utf8only"
209 @echo >>x509.genkey "x509_extensions = myexts"
211 @echo >>x509.genkey "[ req_distinguished_name ]"
212 @echo >>x509.genkey "O = Magrathea"
213 @echo >>x509.genkey "CN = Glacier signing key"
214 @echo >>x509.genkey "emailAddress = slartibartfast@magrathea.h2g2"
216 @echo >>x509.genkey "[ myexts ]"
217 @echo >>x509.genkey "basicConstraints=critical,CA:FALSE"
218 @echo >>x509.genkey "keyUsage=digitalSignature"
219 @echo >>x509.genkey "subjectKeyIdentifier=hash"
220 @echo >>x509.genkey "authorityKeyIdentifier=keyid"