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1da177e4
LT
1#
2# Makefile for the linux kernel.
3#
4
b9ee979e 5obj-y = fork.o exec_domain.o panic.o \
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6 cpu.o exit.o softirq.o resource.o \
7 sysctl.o sysctl_binary.o capability.o ptrace.o user.o \
e73f8959 8 signal.o sys.o kmod.o workqueue.o pid.o task_work.o \
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9 extable.o params.o \
10 kthread.o sys_ni.o nsproxy.o \
15d94b82 11 notifier.o ksysfs.o cred.o reboot.o \
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12 async.o range.o smpboot.o
13
14obj-$(CONFIG_MULTIUSER) += groups.o
029632fb 15
606576ce 16ifdef CONFIG_FUNCTION_TRACER
6ec56232 17# Do not trace debug files and internal ftrace files
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18CFLAGS_REMOVE_cgroup-debug.o = $(CC_FLAGS_FTRACE)
19CFLAGS_REMOVE_irq_work.o = $(CC_FLAGS_FTRACE)
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20endif
21
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22# cond_syscall is currently not LTO compatible
23CFLAGS_sys_ni.o = $(DISABLE_LTO)
24
391e43da 25obj-y += sched/
01768b42 26obj-y += locking/
dae5cbc2 27obj-y += power/
b9ee979e 28obj-y += printk/
0244ad00 29obj-y += irq/
4102adab 30obj-y += rcu/
b700e7f0 31obj-y += livepatch/
391e43da 32
1e142b29 33obj-$(CONFIG_CHECKPOINT_RESTORE) += kcmp.o
8174f150 34obj-$(CONFIG_FREEZER) += freezer.o
b03f6489 35obj-$(CONFIG_PROFILING) += profile.o
8637c099 36obj-$(CONFIG_STACKTRACE) += stacktrace.o
ad596171 37obj-y += time/
1da177e4 38obj-$(CONFIG_FUTEX) += futex.o
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39ifeq ($(CONFIG_COMPAT),y)
40obj-$(CONFIG_FUTEX) += futex_compat.o
41endif
1da177e4 42obj-$(CONFIG_GENERIC_ISA_DMA) += dma.o
351f8f8e 43obj-$(CONFIG_SMP) += smp.o
9316fcac 44ifneq ($(CONFIG_SMP),y)
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45obj-y += up.o
46endif
1da177e4 47obj-$(CONFIG_UID16) += uid16.o
b56e5a17 48obj-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += system_keyring.o system_certificates.o
1da177e4 49obj-$(CONFIG_MODULES) += module.o
b56e5a17 50obj-$(CONFIG_MODULE_SIG) += module_signing.o
1da177e4 51obj-$(CONFIG_KALLSYMS) += kallsyms.o
1da177e4 52obj-$(CONFIG_BSD_PROCESS_ACCT) += acct.o
dc009d92 53obj-$(CONFIG_KEXEC) += kexec.o
6dab2778 54obj-$(CONFIG_BACKTRACE_SELF_TEST) += backtracetest.o
1da177e4 55obj-$(CONFIG_COMPAT) += compat.o
ddbcc7e8 56obj-$(CONFIG_CGROUPS) += cgroup.o
dc52ddc0 57obj-$(CONFIG_CGROUP_FREEZER) += cgroup_freezer.o
1da177e4 58obj-$(CONFIG_CPUSETS) += cpuset.o
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59obj-$(CONFIG_UTS_NS) += utsname.o
60obj-$(CONFIG_USER_NS) += user_namespace.o
74bd59bb 61obj-$(CONFIG_PID_NS) += pid_namespace.o
1da177e4 62obj-$(CONFIG_IKCONFIG) += configs.o
bbf1bb3e 63obj-$(CONFIG_SMP) += stop_machine.o
8c1c9356 64obj-$(CONFIG_KPROBES_SANITY_TEST) += test_kprobes.o
939a67fc 65obj-$(CONFIG_AUDIT) += audit.o auditfilter.o
1da177e4 66obj-$(CONFIG_AUDITSYSCALL) += auditsc.o
939a67fc 67obj-$(CONFIG_AUDIT_WATCH) += audit_watch.o
74c3cbe3 68obj-$(CONFIG_AUDIT_TREE) += audit_tree.o
939a67fc 69obj-$(CONFIG_GCOV_KERNEL) += gcov/
1da177e4 70obj-$(CONFIG_KPROBES) += kprobes.o
c4338209 71obj-$(CONFIG_KGDB) += debug/
e162b39a 72obj-$(CONFIG_DETECT_HUNG_TASK) += hung_task.o
58687acb 73obj-$(CONFIG_LOCKUP_DETECTOR) += watchdog.o
1da177e4 74obj-$(CONFIG_SECCOMP) += seccomp.o
b86ff981 75obj-$(CONFIG_RELAY) += relay.o
39732acd 76obj-$(CONFIG_SYSCTL) += utsname_sysctl.o
ca74e92b 77obj-$(CONFIG_TASK_DELAY_ACCT) += delayacct.o
f3cef7a9 78obj-$(CONFIG_TASKSTATS) += taskstats.o tsacct.o
97e1c18e 79obj-$(CONFIG_TRACEPOINTS) += tracepoint.o
9745512c 80obj-$(CONFIG_LATENCYTOP) += latencytop.o
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81obj-$(CONFIG_BINFMT_ELF) += elfcore.o
82obj-$(CONFIG_COMPAT_BINFMT_ELF) += elfcore.o
83obj-$(CONFIG_BINFMT_ELF_FDPIC) += elfcore.o
606576ce 84obj-$(CONFIG_FUNCTION_TRACER) += trace/
bc0c38d1 85obj-$(CONFIG_TRACING) += trace/
ea632e9f 86obj-$(CONFIG_TRACE_CLOCK) += trace/
1155de47 87obj-$(CONFIG_RING_BUFFER) += trace/
870915e0 88obj-$(CONFIG_TRACEPOINTS) += trace/
e360adbe 89obj-$(CONFIG_IRQ_WORK) += irq_work.o
ab10023e 90obj-$(CONFIG_CPU_PM) += cpu_pm.o
f89b7755 91obj-$(CONFIG_BPF) += bpf/
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92
93obj-$(CONFIG_PERF_EVENTS) += events/
94
7a041097 95obj-$(CONFIG_USER_RETURN_NOTIFIER) += user-return-notifier.o
16295bec 96obj-$(CONFIG_PADATA) += padata.o
93a72052 97obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
b77f0f3c 98obj-$(CONFIG_JUMP_LABEL) += jump_label.o
91d1aa43 99obj-$(CONFIG_CONTEXT_TRACKING) += context_tracking.o
51b1130e 100obj-$(CONFIG_TORTURE_TEST) += torture.o
1da177e4 101
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102$(obj)/configs.o: $(obj)/config_data.h
103
104# config_data.h contains the same information as ikconfig.h but gzipped.
105# Info from config_data can be extracted from /proc/config*
106targets += config_data.gz
41263fc6 107$(obj)/config_data.gz: $(KCONFIG_CONFIG) FORCE
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108 $(call if_changed,gzip)
109
8370edea 110 filechk_ikconfiggz = (echo "static const char kernel_config_data[] __used = MAGIC_START"; cat $< | scripts/basic/bin2c; echo "MAGIC_END;")
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111targets += config_data.h
112$(obj)/config_data.h: $(obj)/config_data.gz FORCE
e78e8f2d 113 $(call filechk,ikconfiggz)
bdc80787 114
f0e6d220 115###############################################################################
631cc66e 116#
0fbd39cf 117# Roll all the X.509 certificates that we can find together and pull them into
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118# the kernel so that they get loaded into the system trusted keyring during
119# boot.
631cc66e 120#
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121# We look in the source root and the build root for all files whose name ends
122# in ".x509". Unfortunately, this will generate duplicate filenames, so we
123# have make canonicalise the pathnames and then sort them to discard the
124# duplicates.
631cc66e 125#
f0e6d220 126###############################################################################
b56e5a17 127ifeq ($(CONFIG_SYSTEM_TRUSTED_KEYRING),y)
f0e6d220 128X509_CERTIFICATES-y := $(wildcard *.x509) $(wildcard $(srctree)/*.x509)
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129X509_CERTIFICATES-$(CONFIG_MODULE_SIG) += $(objtree)/signing_key.x509
130X509_CERTIFICATES-raw := $(sort $(foreach CERT,$(X509_CERTIFICATES-y), \
0fbd39cf 131 $(or $(realpath $(CERT)),$(CERT))))
d7ec435f 132X509_CERTIFICATES := $(subst $(realpath $(objtree))/,,$(X509_CERTIFICATES-raw))
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133
134ifeq ($(X509_CERTIFICATES),)
135$(warning *** No X.509 certificates found ***)
136endif
137
138ifneq ($(wildcard $(obj)/.x509.list),)
139ifneq ($(shell cat $(obj)/.x509.list),$(X509_CERTIFICATES))
140$(info X.509 certificate list changed)
141$(shell rm $(obj)/.x509.list)
142endif
143endif
144
b56e5a17 145kernel/system_certificates.o: $(obj)/x509_certificate_list
e10e1774 146
f0e6d220 147quiet_cmd_x509certs = CERTS $@
89f703f0 148 cmd_x509certs = cat $(X509_CERTIFICATES) /dev/null >$@ $(foreach X509,$(X509_CERTIFICATES),; $(kecho) " - Including cert $(X509)")
e10e1774 149
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150targets += $(obj)/x509_certificate_list
151$(obj)/x509_certificate_list: $(X509_CERTIFICATES) $(obj)/.x509.list
152 $(call if_changed,x509certs)
631cc66e 153
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154targets += $(obj)/.x509.list
155$(obj)/.x509.list:
156 @echo $(X509_CERTIFICATES) >$@
f46a3cbb 157endif
d441108c 158
f0e6d220 159clean-files := x509_certificate_list .x509.list
d441108c 160
b56e5a17 161ifeq ($(CONFIG_MODULE_SIG),y)
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162###############################################################################
163#
164# If module signing is requested, say by allyesconfig, but a key has not been
165# supplied, then one will need to be generated to make sure the build does not
166# fail and that the kernel may be used afterwards.
167#
168###############################################################################
22753674 169ifndef CONFIG_MODULE_SIG_HASH
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170$(error Could not determine digest type to use from kernel config)
171endif
172
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173signing_key.priv signing_key.x509: x509.genkey
174 @echo "###"
175 @echo "### Now generating an X.509 key pair to be used for signing modules."
176 @echo "###"
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"
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179 @echo "### needs to be run as root, and uses a hardware random"
180 @echo "### number generator if one is available."
d441108c 181 @echo "###"
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182 openssl req -new -nodes -utf8 -$(CONFIG_MODULE_SIG_HASH) -days 36500 \
183 -batch -x509 -config x509.genkey \
d441108c 184 -outform DER -out signing_key.x509 \
07c449bb 185 -keyout signing_key.priv 2>&1
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186 @echo "###"
187 @echo "### Key pair generated."
188 @echo "###"
189
190x509.genkey:
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"
e7d113bc 196 @echo >>x509.genkey "string_mask = utf8only"
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197 @echo >>x509.genkey "x509_extensions = myexts"
198 @echo >>x509.genkey
199 @echo >>x509.genkey "[ req_distinguished_name ]"
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200 @echo >>x509.genkey "#O = Unspecified company"
201 @echo >>x509.genkey "CN = Build time autogenerated kernel key"
202 @echo >>x509.genkey "#emailAddress = unspecified.user@unspecified.company"
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203 @echo >>x509.genkey
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"
209endif