kernel/Makefile

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