summaryrefslogtreecommitdiff
path: root/kernel/Makefile
blob: 7453283981ca8ef28f6007b550b463777dfbe6a7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
#
# Makefile for the linux kernel.
#

obj-y     = fork.o exec_domain.o panic.o \
	    cpu.o exit.o softirq.o resource.o \
	    sysctl.o sysctl_binary.o capability.o ptrace.o user.o \
	    signal.o sys.o kmod.o workqueue.o pid.o task_work.o \
	    extable.o params.o \
	    kthread.o sys_ni.o nsproxy.o \
	    notifier.o ksysfs.o cred.o reboot.o \
	    async.o range.o smpboot.o

obj-$(CONFIG_MULTIUSER) += groups.o

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

# cond_syscall is currently not LTO compatible
CFLAGS_sys_ni.o = $(DISABLE_LTO)

obj-y += sched/
obj-y += locking/
obj-y += power/
obj-y += printk/
obj-y += irq/
obj-y += rcu/
obj-y += livepatch/

obj-$(CONFIG_CHECKPOINT_RESTORE) += kcmp.o
obj-$(CONFIG_FREEZER) += freezer.o
obj-$(CONFIG_PROFILING) += profile.o
obj-$(CONFIG_STACKTRACE) += stacktrace.o
obj-y += time/
obj-$(CONFIG_FUTEX) += futex.o
ifeq ($(CONFIG_COMPAT),y)
obj-$(CONFIG_FUTEX) += futex_compat.o
endif
obj-$(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_SYSTEM_TRUSTED_KEYRING) += system_keyring.o system_certificates.o
obj-$(CONFIG_MODULES) += module.o
obj-$(CONFIG_MODULE_SIG) += module_signing.o
obj-$(CONFIG_KALLSYMS) += kallsyms.o
obj-$(CONFIG_BSD_PROCESS_ACCT) += acct.o
obj-$(CONFIG_KEXEC) += kexec.o
obj-$(CONFIG_BACKTRACE_SELF_TEST) += backtracetest.o
obj-$(CONFIG_COMPAT) += compat.o
obj-$(CONFIG_CGROUPS) += cgroup.o
obj-$(CONFIG_CGROUP_FREEZER) += cgroup_freezer.o
obj-$(CONFIG_CPUSETS) += cpuset.o
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-$(CONFIG_SMP) += stop_machine.o
obj-$(CONFIG_KPROBES_SANITY_TEST) += test_kprobes.o
obj-$(CONFIG_AUDIT) += audit.o auditfilter.o
obj-$(CONFIG_AUDITSYSCALL) += auditsc.o
obj-$(CONFIG_AUDIT_WATCH) += audit_watch.o
obj-$(CONFIG_AUDIT_TREE) += audit_tree.o
obj-$(CONFIG_GCOV_KERNEL) += gcov/
obj-$(CONFIG_KPROBES) += kprobes.o
obj-$(CONFIG_KGDB) += debug/
obj-$(CONFIG_DETECT_HUNG_TASK) += hung_task.o
obj-$(CONFIG_LOCKUP_DETECTOR) += watchdog.o
obj-$(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-$(CONFIG_BINFMT_ELF) += elfcore.o
obj-$(CONFIG_COMPAT_BINFMT_ELF) += elfcore.o
obj-$(CONFIG_BINFMT_ELF_FDPIC) += elfcore.o
obj-$(CONFIG_FUNCTION_TRACER) += trace/
obj-$(CONFIG_TRACING) += trace/
obj-$(CONFIG_TRACE_CLOCK) += trace/
obj-$(CONFIG_RING_BUFFER) += trace/
obj-$(CONFIG_TRACEPOINTS) += trace/
obj-$(CONFIG_IRQ_WORK) += irq_work.o
obj-$(CONFIG_CPU_PM) += cpu_pm.o
obj-$(CONFIG_BPF) += bpf/

obj-$(CONFIG_PERF_EVENTS) += events/

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

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

# config_data.h contains the same information as ikconfig.h but gzipped.
# Info from config_data can be extracted from /proc/config*
targets += config_data.gz
$(obj)/config_data.gz: $(KCONFIG_CONFIG) FORCE
	$(call if_changed,gzip)

      filechk_ikconfiggz = (echo "static const char kernel_config_data[] __used = MAGIC_START"; cat $< | scripts/basic/bin2c; echo "MAGIC_END;")
targets += config_data.h
$(obj)/config_data.h: $(obj)/config_data.gz FORCE
	$(call filechk,ikconfiggz)

###############################################################################
#
# Roll all the X.509 certificates that we can find together and pull them into
# the kernel so that they get loaded into the system trusted keyring during
# boot.
#
# We look in the source root and the build root for all files whose name ends
# in ".x509".  Unfortunately, this will generate duplicate filenames, so we
# have make canonicalise the pathnames and then sort them to discard the
# duplicates.
#
###############################################################################
ifeq ($(CONFIG_SYSTEM_TRUSTED_KEYRING),y)
X509_CERTIFICATES-y := $(wildcard *.x509) $(wildcard $(srctree)/*.x509)
X509_CERTIFICATES-$(CONFIG_MODULE_SIG) += $(objtree)/signing_key.x509
X509_CERTIFICATES-raw := $(sort $(foreach CERT,$(X509_CERTIFICATES-y), \
				$(or $(realpath $(CERT)),$(CERT))))
X509_CERTIFICATES := $(subst $(realpath $(objtree))/,,$(X509_CERTIFICATES-raw))

ifeq ($(X509_CERTIFICATES),)
$(warning *** No X.509 certificates found ***)
endif

ifneq ($(wildcard $(obj)/.x509.list),)
ifneq ($(shell cat $(obj)/.x509.list),$(X509_CERTIFICATES))
$(warning X.509 certificate list changed to "$(X509_CERTIFICATES)" from "$(shell cat $(obj)/.x509.list)")
$(shell rm $(obj)/.x509.list)
endif
endif

kernel/system_certificates.o: $(obj)/x509_certificate_list

quiet_cmd_x509certs  = CERTS   $@
      cmd_x509certs  = cat $(X509_CERTIFICATES) /dev/null >$@ $(foreach X509,$(X509_CERTIFICATES),; $(kecho) "  - Including cert $(X509)")

targets += $(obj)/x509_certificate_list
$(obj)/x509_certificate_list: $(X509_CERTIFICATES) $(obj)/.x509.list
	$(call if_changed,x509certs)

targets += $(obj)/.x509.list
$(obj)/.x509.list:
	@echo $(X509_CERTIFICATES) >$@
endif

clean-files := x509_certificate_list .x509.list

ifeq ($(CONFIG_MODULE_SIG),y)
###############################################################################
#
# If module signing is requested, say by allyesconfig, but a key has not been
# supplied, then one will need to be generated to make sure the build does not
# fail and that the kernel may be used afterwards.
#
###############################################################################
ifndef CONFIG_MODULE_SIG_HASH
$(error Could not determine digest type to use from kernel config)
endif

# We do it this way rather than having a boolean option for enabling an
# external private key, because 'make randconfig' might enable such a
# boolean option and we unfortunately can't make it depend on !RANDCONFIG.
ifeq ($(CONFIG_MODULE_SIG_KEY),"signing_key.pem")
signing_key.pem: x509.genkey
	@echo "###"
	@echo "### Now generating an X.509 key pair to be used for signing modules."
	@echo "###"
	@echo "### If this takes a long time, you might wish to run rngd in the"
	@echo "### background to keep the supply of entropy topped up.  It"
	@echo "### needs to be run as root, and uses a hardware random"
	@echo "### number generator if one is available."
	@echo "###"
	openssl req -new -nodes -utf8 -$(CONFIG_MODULE_SIG_HASH) -days 36500 \
		-batch -x509 -config x509.genkey \
		-outform PEM -out signing_key.pem \
		-keyout signing_key.pem 2>&1
	@echo "###"
	@echo "### Key pair generated."
	@echo "###"

x509.genkey:
	@echo Generating X.509 key generation config
	@echo  >x509.genkey "[ req ]"
	@echo >>x509.genkey "default_bits = 4096"
	@echo >>x509.genkey "distinguished_name = req_distinguished_name"
	@echo >>x509.genkey "prompt = no"
	@echo >>x509.genkey "string_mask = utf8only"
	@echo >>x509.genkey "x509_extensions = myexts"
	@echo >>x509.genkey
	@echo >>x509.genkey "[ req_distinguished_name ]"
	@echo >>x509.genkey "#O = Unspecified company"
	@echo >>x509.genkey "CN = Build time autogenerated kernel key"
	@echo >>x509.genkey "#emailAddress = unspecified.user@unspecified.company"
	@echo >>x509.genkey
	@echo >>x509.genkey "[ myexts ]"
	@echo >>x509.genkey "basicConstraints=critical,CA:FALSE"
	@echo >>x509.genkey "keyUsage=digitalSignature"
	@echo >>x509.genkey "subjectKeyIdentifier=hash"
	@echo >>x509.genkey "authorityKeyIdentifier=keyid"
endif

# We need to obtain the certificate from CONFIG_MODULE_SIG_KEY.
quiet_cmd_extract_der = CERT_DER $(2)
      cmd_extract_der = scripts/extract-cert "$(2)" signing_key.x509

# CONFIG_MODULE_SIG_KEY is either a PKCS#11 URI or a filename. It is
# surrounded by quotes, and may contain spaces. To strip the quotes
# with $(patsubst) we need to turn the spaces into something else.
# And if it's a filename, those spaces need to be escaped as '\ ' in
# order to use it in dependencies or $(wildcard).
space :=
space +=
space_escape := %%%SPACE%%%
X509_SOURCE_temp := $(subst $(space),$(space_escape),$(CONFIG_MODULE_SIG_KEY))
# We need this to check for absolute paths or PKCS#11 URIs.
X509_SOURCE_ONEWORD := $(patsubst "%",%,$(X509_SOURCE_temp))
# This is the actual source filename/URI without the quotes
X509_SOURCE := $(subst $(space_escape),$(space),$(X509_SOURCE_ONEWORD))
# This\ version\ with\ spaces\ escaped\ for\ $(wildcard)\ and\ dependencies
X509_SOURCE_ESCAPED := $(subst $(space_escape),\$(space),$(X509_SOURCE_ONEWORD))

ifeq ($(patsubst pkcs11:%,%,$(X509_SOURCE_ONEWORD)),$(X509_SOURCE_ONEWORD))
# If it's a filename, depend on it.
X509_DEP := $(X509_SOURCE_ESCAPED)
ifeq ($(patsubst /%,%,$(X509_SOURCE_ONEWORD)),$(X509_SOURCE_ONEWORD))
ifeq ($(wildcard $(X509_SOURCE_ESCAPED)),)
ifneq ($(wildcard $(srctree)/$(X509_SOURCE_ESCAPED)),)
# Non-absolute filename, found in source tree and not build tree
X509_SOURCE := $(srctree)/$(X509_SOURCE)
X509_DEP := $(srctree)/$(X509_SOURCE_ESCAPED)
endif
endif
endif
endif

signing_key.x509: scripts/extract-cert include/config/module/sig/key.h $(X509_DEP)
	$(call cmd,extract_der,$(X509_SOURCE))
endif