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
21 # cond_syscall is currently not LTO compatible
22 CFLAGS_sys_ni.o
= $(DISABLE_LTO
)
31 obj-
$(CONFIG_CHECKPOINT_RESTORE
) += kcmp.o
32 obj-
$(CONFIG_FREEZER
) += freezer.o
33 obj-
$(CONFIG_PROFILING
) += profile.o
34 obj-
$(CONFIG_STACKTRACE
) += stacktrace.o
36 obj-
$(CONFIG_FUTEX
) += futex.o
37 ifeq ($(CONFIG_COMPAT
),y
)
38 obj-
$(CONFIG_FUTEX
) += futex_compat.o
40 obj-
$(CONFIG_GENERIC_ISA_DMA
) += dma.o
41 obj-
$(CONFIG_SMP
) += smp.o
42 ifneq ($(CONFIG_SMP
),y
)
45 obj-
$(CONFIG_UID16
) += uid16.o
46 obj-
$(CONFIG_SYSTEM_TRUSTED_KEYRING
) += system_keyring.o system_certificates.o
47 obj-
$(CONFIG_MODULES
) += module.o
48 obj-
$(CONFIG_MODULE_SIG
) += module_signing.o
49 obj-
$(CONFIG_KALLSYMS
) += kallsyms.o
50 obj-
$(CONFIG_BSD_PROCESS_ACCT
) += acct.o
51 obj-
$(CONFIG_KEXEC
) += kexec.o
52 obj-
$(CONFIG_BACKTRACE_SELF_TEST
) += backtracetest.o
53 obj-
$(CONFIG_COMPAT
) += compat.o
54 obj-
$(CONFIG_CGROUPS
) += cgroup.o
55 obj-
$(CONFIG_CGROUP_FREEZER
) += cgroup_freezer.o
56 obj-
$(CONFIG_CPUSETS
) += cpuset.o
57 obj-
$(CONFIG_UTS_NS
) += utsname.o
58 obj-
$(CONFIG_USER_NS
) += user_namespace.o
59 obj-
$(CONFIG_PID_NS
) += pid_namespace.o
60 obj-
$(CONFIG_IKCONFIG
) += configs.o
61 obj-
$(CONFIG_RESOURCE_COUNTERS
) += res_counter.o
62 obj-
$(CONFIG_SMP
) += stop_machine.o
63 obj-
$(CONFIG_KPROBES_SANITY_TEST
) += test_kprobes.o
64 obj-
$(CONFIG_AUDIT
) += audit.o auditfilter.o
65 obj-
$(CONFIG_AUDITSYSCALL
) += auditsc.o
66 obj-
$(CONFIG_AUDIT_WATCH
) += audit_watch.o
67 obj-
$(CONFIG_AUDIT_TREE
) += audit_tree.o
68 obj-
$(CONFIG_GCOV_KERNEL
) += gcov
/
69 obj-
$(CONFIG_KPROBES
) += kprobes.o
70 obj-
$(CONFIG_KGDB
) += debug
/
71 obj-
$(CONFIG_DETECT_HUNG_TASK
) += hung_task.o
72 obj-
$(CONFIG_LOCKUP_DETECTOR
) += watchdog.o
73 obj-
$(CONFIG_SECCOMP
) += seccomp.o
74 obj-
$(CONFIG_RELAY
) += relay.o
75 obj-
$(CONFIG_SYSCTL
) += utsname_sysctl.o
76 obj-
$(CONFIG_TASK_DELAY_ACCT
) += delayacct.o
77 obj-
$(CONFIG_TASKSTATS
) += taskstats.o tsacct.o
78 obj-
$(CONFIG_TRACEPOINTS
) += tracepoint.o
79 obj-
$(CONFIG_LATENCYTOP
) += latencytop.o
80 obj-
$(CONFIG_BINFMT_ELF
) += elfcore.o
81 obj-
$(CONFIG_COMPAT_BINFMT_ELF
) += elfcore.o
82 obj-
$(CONFIG_BINFMT_ELF_FDPIC
) += elfcore.o
83 obj-
$(CONFIG_FUNCTION_TRACER
) += trace
/
84 obj-
$(CONFIG_TRACING
) += trace
/
85 obj-
$(CONFIG_TRACE_CLOCK
) += trace
/
86 obj-
$(CONFIG_RING_BUFFER
) += trace
/
87 obj-
$(CONFIG_TRACEPOINTS
) += trace
/
88 obj-
$(CONFIG_IRQ_WORK
) += irq_work.o
89 obj-
$(CONFIG_CPU_PM
) += cpu_pm.o
90 obj-
$(CONFIG_NET
) += bpf
/
92 obj-
$(CONFIG_PERF_EVENTS
) += events
/
94 obj-
$(CONFIG_USER_RETURN_NOTIFIER
) += user-return-notifier.o
95 obj-
$(CONFIG_PADATA
) += padata.o
96 obj-
$(CONFIG_CRASH_DUMP
) += crash_dump.o
97 obj-
$(CONFIG_JUMP_LABEL
) += jump_label.o
98 obj-
$(CONFIG_CONTEXT_TRACKING
) += context_tracking.o
99 obj-
$(CONFIG_TORTURE_TEST
) += torture.o
101 $(obj
)/configs.o
: $(obj
)/config_data.h
103 # config_data.h contains the same information as ikconfig.h but gzipped.
104 # Info from config_data can be extracted from /proc/config*
105 targets
+= config_data.gz
106 $(obj
)/config_data.gz
: $(KCONFIG_CONFIG
) FORCE
107 $(call if_changed
,gzip
)
109 filechk_ikconfiggz
= (echo
"static const char kernel_config_data[] __used = MAGIC_START"; cat
$< | scripts
/bin2c
; echo
"MAGIC_END;")
110 targets
+= config_data.h
111 $(obj
)/config_data.h
: $(obj
)/config_data.gz FORCE
112 $(call filechk
,ikconfiggz
)
114 $(obj
)/time.o
: $(obj
)/timeconst.h
116 quiet_cmd_hzfile
= HZFILE
$@
117 cmd_hzfile
= echo
"hz=$(CONFIG_HZ)" > $@
120 $(obj
)/hz.bc
: $(objtree
)/include/config
/hz.h FORCE
121 $(call if_changed
,hzfile
)
124 cmd_bc
= bc
-q
$(filter-out FORCE
,$^
) > $@
126 targets
+= timeconst.h
127 $(obj
)/timeconst.h
: $(obj
)/hz.bc
$(src
)/timeconst.bc FORCE
128 $(call if_changed
,bc
)
130 ###############################################################################
132 # Roll all the X.509 certificates that we can find together and pull them into
133 # the kernel so that they get loaded into the system trusted keyring during
136 # We look in the source root and the build root for all files whose name ends
137 # in ".x509". Unfortunately, this will generate duplicate filenames, so we
138 # have make canonicalise the pathnames and then sort them to discard the
141 ###############################################################################
142 ifeq ($(CONFIG_SYSTEM_TRUSTED_KEYRING
),y
)
143 X509_CERTIFICATES-y
:= $(wildcard *.x509
) $(wildcard $(srctree
)/*.x509
)
144 X509_CERTIFICATES-
$(CONFIG_MODULE_SIG
) += $(objtree
)/signing_key.x509
145 X509_CERTIFICATES-raw
:= $(sort $(foreach CERT
,$(X509_CERTIFICATES-y
), \
146 $(or
$(realpath
$(CERT
)),$(CERT
))))
147 X509_CERTIFICATES
:= $(subst $(realpath
$(objtree
))/,,$(X509_CERTIFICATES-raw
))
149 ifeq ($(X509_CERTIFICATES
),)
150 $(warning
*** No X
.509 certificates found
***)
153 ifneq ($(wildcard $(obj
)/.x509.list
),)
154 ifneq ($(shell cat
$(obj
)/.x509.list
),$(X509_CERTIFICATES
))
155 $(info X
.509 certificate list changed
)
156 $(shell rm $(obj
)/.x509.list
)
160 kernel
/system_certificates.o
: $(obj
)/x509_certificate_list
162 quiet_cmd_x509certs
= CERTS
$@
163 cmd_x509certs
= cat
$(X509_CERTIFICATES
) /dev
/null
>$@
$(foreach X509
,$(X509_CERTIFICATES
),; echo
" - Including cert $(X509)")
165 targets
+= $(obj
)/x509_certificate_list
166 $(obj
)/x509_certificate_list
: $(X509_CERTIFICATES
) $(obj
)/.x509.list
167 $(call if_changed
,x509certs
)
169 targets
+= $(obj
)/.x509.list
171 @echo
$(X509_CERTIFICATES
) >$@
174 clean-files
:= x509_certificate_list .x509.list
176 ifeq ($(CONFIG_MODULE_SIG
),y
)
177 ###############################################################################
179 # If module signing is requested, say by allyesconfig, but a key has not been
180 # supplied, then one will need to be generated to make sure the build does not
181 # fail and that the kernel may be used afterwards.
183 ###############################################################################
184 ifndef CONFIG_MODULE_SIG_HASH
185 $(error Could not determine digest type to use from kernel config
)
188 signing_key.priv signing_key.x509
: x509.genkey
190 @echo
"### Now generating an X.509 key pair to be used for signing modules."
192 @echo
"### If this takes a long time, you might wish to run rngd in the"
193 @echo
"### background to keep the supply of entropy topped up. It"
194 @echo
"### needs to be run as root, and uses a hardware random"
195 @echo
"### number generator if one is available."
197 openssl req
-new
-nodes
-utf8
-$(CONFIG_MODULE_SIG_HASH
) -days
36500 \
198 -batch
-x509
-config x509.genkey \
199 -outform DER
-out signing_key.x509 \
200 -keyout signing_key.priv
2>&1
202 @echo
"### Key pair generated."
206 @echo Generating X
.509 key generation config
207 @echo
>x509.genkey
"[ req ]"
208 @echo
>>x509.genkey
"default_bits = 4096"
209 @echo
>>x509.genkey
"distinguished_name = req_distinguished_name"
210 @echo
>>x509.genkey
"prompt = no"
211 @echo
>>x509.genkey
"string_mask = utf8only"
212 @echo
>>x509.genkey
"x509_extensions = myexts"
214 @echo
>>x509.genkey
"[ req_distinguished_name ]"
215 @echo
>>x509.genkey
"O = Magrathea"
216 @echo
>>x509.genkey
"CN = Glacier signing key"
217 @echo
>>x509.genkey
"emailAddress = slartibartfast@magrathea.h2g2"
219 @echo
>>x509.genkey
"[ myexts ]"
220 @echo
>>x509.genkey
"basicConstraints=critical,CA:FALSE"
221 @echo
>>x509.genkey
"keyUsage=digitalSignature"
222 @echo
>>x509.genkey
"subjectKeyIdentifier=hash"
223 @echo
>>x509.genkey
"authorityKeyIdentifier=keyid"