linux - kernel/Makefile

206 lines · 7.3 KiB

1	#
2	# Makefile for the linux kernel.
3	#
4
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 \
9	extable.o params.o \
10	kthread.o sys_ni.o nsproxy.o \
11	notifier.o ksysfs.o cred.o reboot.o \
12	async.o range.o groups.o smpboot.o
13
14	ifdef CONFIG_FUNCTION_TRACER
15	# Do not trace debug files and internal ftrace files
16	CFLAGS_REMOVE_cgroup-debug.o = -pg
17	CFLAGS_REMOVE_irq_work.o = -pg
18	endif
19
20	# cond_syscall is currently not LTO compatible
21	CFLAGS_sys_ni.o = $(DISABLE_LTO)
22
23	obj-y += sched/
24	obj-y += locking/
25	obj-y += power/
26	obj-y += printk/
27	obj-y += irq/
28	obj-y += rcu/
29
30	obj-$(CONFIG_CHECKPOINT_RESTORE) += kcmp.o
31	obj-$(CONFIG_FREEZER) += freezer.o
32	obj-$(CONFIG_PROFILING) += profile.o
33	obj-$(CONFIG_STACKTRACE) += stacktrace.o
34	obj-y += time/
35	obj-$(CONFIG_FUTEX) += futex.o
36	ifeq ($(CONFIG_COMPAT),y)
37	obj-$(CONFIG_FUTEX) += futex_compat.o
38	endif
39	obj-$(CONFIG_GENERIC_ISA_DMA) += dma.o
40	obj-$(CONFIG_SMP) += smp.o
41	ifneq ($(CONFIG_SMP),y)
42	obj-y += up.o
43	endif
44	obj-$(CONFIG_UID16) += uid16.o
45	obj-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += system_keyring.o system_certificates.o
46	obj-$(CONFIG_MODULES) += module.o
47	obj-$(CONFIG_MODULE_SIG) += module_signing.o
48	obj-$(CONFIG_KALLSYMS) += kallsyms.o
49	obj-$(CONFIG_BSD_PROCESS_ACCT) += acct.o
50	obj-$(CONFIG_KEXEC) += kexec.o
51	obj-$(CONFIG_BACKTRACE_SELF_TEST) += backtracetest.o
52	obj-$(CONFIG_COMPAT) += compat.o
53	obj-$(CONFIG_CGROUPS) += cgroup.o
54	obj-$(CONFIG_CGROUP_FREEZER) += cgroup_freezer.o
55	obj-$(CONFIG_CPUSETS) += cpuset.o
56	obj-$(CONFIG_UTS_NS) += utsname.o
57	obj-$(CONFIG_USER_NS) += user_namespace.o
58	obj-$(CONFIG_PID_NS) += pid_namespace.o
59	obj-$(CONFIG_IKCONFIG) += configs.o
60	obj-$(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-$(CONFIG_CPU_PM) += cpu_pm.o
88	obj-$(CONFIG_BPF) += bpf/
89
90	obj-$(CONFIG_PERF_EVENTS) += events/
91
92	obj-$(CONFIG_USER_RETURN_NOTIFIER) += user-return-notifier.o
93	obj-$(CONFIG_PADATA) += padata.o
94	obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
95	obj-$(CONFIG_JUMP_LABEL) += jump_label.o
96	obj-$(CONFIG_CONTEXT_TRACKING) += context_tracking.o
97	obj-$(CONFIG_TORTURE_TEST) += torture.o
98
99	$(obj)/configs.o: $(obj)/config_data.h
100
101	# config_data.h contains the same information as ikconfig.h but gzipped.
102	# Info from config_data can be extracted from /proc/config*
103	targets += config_data.gz
104	$(obj)/config_data.gz: $(KCONFIG_CONFIG) FORCE
105	$(call if_changed,gzip)
106
107	filechk_ikconfiggz = (echo "static const char kernel_config_data[] __used = MAGIC_START"; cat $< \| scripts/basic/bin2c; echo "MAGIC_END;")
108	targets += config_data.h
109	$(obj)/config_data.h: $(obj)/config_data.gz FORCE
110	$(call filechk,ikconfiggz)
111
112	###############################################################################
113	#
114	# Roll all the X.509 certificates that we can find together and pull them into
115	# the kernel so that they get loaded into the system trusted keyring during
116	# boot.
117	#
118	# We look in the source root and the build root for all files whose name ends
119	# in ".x509". Unfortunately, this will generate duplicate filenames, so we
120	# have make canonicalise the pathnames and then sort them to discard the
121	# duplicates.
122	#
123	###############################################################################
124	ifeq ($(CONFIG_SYSTEM_TRUSTED_KEYRING),y)
125	X509_CERTIFICATES-y := $(wildcard .x509) $(wildcard $(srctree)/.x509)
126	X509_CERTIFICATES-$(CONFIG_MODULE_SIG) += $(objtree)/signing_key.x509
127	X509_CERTIFICATES-raw := $(sort $(foreach CERT,$(X509_CERTIFICATES-y), \
128	$(or $(realpath $(CERT)),$(CERT))))
129	X509_CERTIFICATES := $(subst $(realpath $(objtree))/,,$(X509_CERTIFICATES-raw))
130
131	ifeq ($(X509_CERTIFICATES),)
132	$(warning * No X.509 certificates found *)
133	endif
134
135	ifneq ($(wildcard $(obj)/.x509.list),)
136	ifneq ($(shell cat $(obj)/.x509.list),$(X509_CERTIFICATES))
137	$(info X.509 certificate list changed)
138	$(shell rm $(obj)/.x509.list)
139	endif
140	endif
141
142	kernel/system_certificates.o: $(obj)/x509_certificate_list
143
144	quiet_cmd_x509certs = CERTS $@
145	cmd_x509certs = cat $(X509_CERTIFICATES) /dev/null >$@ $(foreach X509,$(X509_CERTIFICATES),; echo " - Including cert $(X509)")
146
147	targets += $(obj)/x509_certificate_list
148	$(obj)/x509_certificate_list: $(X509_CERTIFICATES) $(obj)/.x509.list
149	$(call if_changed,x509certs)
150
151	targets += $(obj)/.x509.list
152	$(obj)/.x509.list:
153	@echo $(X509_CERTIFICATES) >$@
154	endif
155
156	clean-files := x509_certificate_list .x509.list
157
158	ifeq ($(CONFIG_MODULE_SIG),y)
159	###############################################################################
160	#
161	# If module signing is requested, say by allyesconfig, but a key has not been
162	# supplied, then one will need to be generated to make sure the build does not
163	# fail and that the kernel may be used afterwards.
164	#
165	###############################################################################
166	ifndef CONFIG_MODULE_SIG_HASH
167	$(error Could not determine digest type to use from kernel config)
168	endif
169
170	signing_key.priv signing_key.x509: x509.genkey
171	@echo "###"
172	@echo "### Now generating an X.509 key pair to be used for signing modules."
173	@echo "###"
174	@echo "### If this takes a long time, you might wish to run rngd in the"
175	@echo "### background to keep the supply of entropy topped up. It"
176	@echo "### needs to be run as root, and uses a hardware random"
177	@echo "### number generator if one is available."
178	@echo "###"
179	openssl req -new -nodes -utf8 -$(CONFIG_MODULE_SIG_HASH) -days 36500 \
180	-batch -x509 -config x509.genkey \
181	-outform DER -out signing_key.x509 \
182	-keyout signing_key.priv 2>&1
183	@echo "###"
184	@echo "### Key pair generated."
185	@echo "###"
186
187	x509.genkey:
188	@echo Generating X.509 key generation config
189	@echo >x509.genkey "[ req ]"
190	@echo >>x509.genkey "default_bits = 4096"
191	@echo >>x509.genkey "distinguished_name = req_distinguished_name"
192	@echo >>x509.genkey "prompt = no"
193	@echo >>x509.genkey "string_mask = utf8only"
194	@echo >>x509.genkey "x509_extensions = myexts"
195	@echo >>x509.genkey
196	@echo >>x509.genkey "[ req_distinguished_name ]"
197	@echo >>x509.genkey "O = Magrathea"
198	@echo >>x509.genkey "CN = Glacier signing key"
199	@echo >>x509.genkey "emailAddress = [email protected]"
200	@echo >>x509.genkey
201	@echo >>x509.genkey "[ myexts ]"
202	@echo >>x509.genkey "basicConstraints=critical,CA:FALSE"
203	@echo >>x509.genkey "keyUsage=digitalSignature"
204	@echo >>x509.genkey "subjectKeyIdentifier=hash"
205	@echo >>x509.genkey "authorityKeyIdentifier=keyid"
206	endif