1# 2# Makefile for the linux kernel. 3# 4 5obj-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 14obj-$(CONFIG_MULTIUSER) += groups.o 15 16ifdef CONFIG_FUNCTION_TRACER 17# Do not trace debug files and internal ftrace files 18CFLAGS_REMOVE_cgroup-debug.o = $(CC_FLAGS_FTRACE) 19CFLAGS_REMOVE_irq_work.o = $(CC_FLAGS_FTRACE) 20endif 21 22# cond_syscall is currently not LTO compatible 23CFLAGS_sys_ni.o = $(DISABLE_LTO) 24 25obj-y += sched/ 26obj-y += locking/ 27obj-y += power/ 28obj-y += printk/ 29obj-y += irq/ 30obj-y += rcu/ 31obj-y += livepatch/ 32 33obj-$(CONFIG_CHECKPOINT_RESTORE) += kcmp.o 34obj-$(CONFIG_FREEZER) += freezer.o 35obj-$(CONFIG_PROFILING) += profile.o 36obj-$(CONFIG_STACKTRACE) += stacktrace.o 37obj-y += time/ 38obj-$(CONFIG_FUTEX) += futex.o 39ifeq ($(CONFIG_COMPAT),y) 40obj-$(CONFIG_FUTEX) += futex_compat.o 41endif 42obj-$(CONFIG_GENERIC_ISA_DMA) += dma.o 43obj-$(CONFIG_SMP) += smp.o 44ifneq ($(CONFIG_SMP),y) 45obj-y += up.o 46endif 47obj-$(CONFIG_UID16) += uid16.o 48obj-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += system_keyring.o system_certificates.o 49obj-$(CONFIG_MODULES) += module.o 50obj-$(CONFIG_MODULE_SIG) += module_signing.o 51obj-$(CONFIG_KALLSYMS) += kallsyms.o 52obj-$(CONFIG_BSD_PROCESS_ACCT) += acct.o 53obj-$(CONFIG_KEXEC) += kexec.o 54obj-$(CONFIG_BACKTRACE_SELF_TEST) += backtracetest.o 55obj-$(CONFIG_COMPAT) += compat.o 56obj-$(CONFIG_CGROUPS) += cgroup.o 57obj-$(CONFIG_CGROUP_FREEZER) += cgroup_freezer.o 58obj-$(CONFIG_CPUSETS) += cpuset.o 59obj-$(CONFIG_UTS_NS) += utsname.o 60obj-$(CONFIG_USER_NS) += user_namespace.o 61obj-$(CONFIG_PID_NS) += pid_namespace.o 62obj-$(CONFIG_IKCONFIG) += configs.o 63obj-$(CONFIG_SMP) += stop_machine.o 64obj-$(CONFIG_KPROBES_SANITY_TEST) += test_kprobes.o 65obj-$(CONFIG_AUDIT) += audit.o auditfilter.o 66obj-$(CONFIG_AUDITSYSCALL) += auditsc.o 67obj-$(CONFIG_AUDIT_WATCH) += audit_watch.o 68obj-$(CONFIG_AUDIT_TREE) += audit_tree.o 69obj-$(CONFIG_GCOV_KERNEL) += gcov/ 70obj-$(CONFIG_KPROBES) += kprobes.o 71obj-$(CONFIG_KGDB) += debug/ 72obj-$(CONFIG_DETECT_HUNG_TASK) += hung_task.o 73obj-$(CONFIG_LOCKUP_DETECTOR) += watchdog.o 74obj-$(CONFIG_SECCOMP) += seccomp.o 75obj-$(CONFIG_RELAY) += relay.o 76obj-$(CONFIG_SYSCTL) += utsname_sysctl.o 77obj-$(CONFIG_TASK_DELAY_ACCT) += delayacct.o 78obj-$(CONFIG_TASKSTATS) += taskstats.o tsacct.o 79obj-$(CONFIG_TRACEPOINTS) += tracepoint.o 80obj-$(CONFIG_LATENCYTOP) += latencytop.o 81obj-$(CONFIG_BINFMT_ELF) += elfcore.o 82obj-$(CONFIG_COMPAT_BINFMT_ELF) += elfcore.o 83obj-$(CONFIG_BINFMT_ELF_FDPIC) += elfcore.o 84obj-$(CONFIG_FUNCTION_TRACER) += trace/ 85obj-$(CONFIG_TRACING) += trace/ 86obj-$(CONFIG_TRACE_CLOCK) += trace/ 87obj-$(CONFIG_RING_BUFFER) += trace/ 88obj-$(CONFIG_TRACEPOINTS) += trace/ 89obj-$(CONFIG_IRQ_WORK) += irq_work.o 90obj-$(CONFIG_CPU_PM) += cpu_pm.o 91obj-$(CONFIG_BPF) += bpf/ 92 93obj-$(CONFIG_PERF_EVENTS) += events/ 94 95obj-$(CONFIG_USER_RETURN_NOTIFIER) += user-return-notifier.o 96obj-$(CONFIG_PADATA) += padata.o 97obj-$(CONFIG_CRASH_DUMP) += crash_dump.o 98obj-$(CONFIG_JUMP_LABEL) += jump_label.o 99obj-$(CONFIG_CONTEXT_TRACKING) += context_tracking.o 100obj-$(CONFIG_TORTURE_TEST) += torture.o 101 102$(obj)/configs.o: $(obj)/config_data.h 103 104# config_data.h contains the same information as ikconfig.h but gzipped. 105# Info from config_data can be extracted from /proc/config* 106targets += config_data.gz 107$(obj)/config_data.gz: $(KCONFIG_CONFIG) FORCE 108 $(call if_changed,gzip) 109 110 filechk_ikconfiggz = (echo "static const char kernel_config_data[] __used = MAGIC_START"; cat $< | scripts/basic/bin2c; echo "MAGIC_END;") 111targets += config_data.h 112$(obj)/config_data.h: $(obj)/config_data.gz FORCE 113 $(call filechk,ikconfiggz) 114 115############################################################################### 116# 117# Roll all the X.509 certificates that we can find together and pull them into 118# the kernel so that they get loaded into the system trusted keyring during 119# boot. 120# 121# We look in the source root and the build root for all files whose name ends 122# in ".x509". Unfortunately, this will generate duplicate filenames, so we 123# have make canonicalise the pathnames and then sort them to discard the 124# duplicates. 125# 126############################################################################### 127ifeq ($(CONFIG_SYSTEM_TRUSTED_KEYRING),y) 128X509_CERTIFICATES-y := $(wildcard *.x509) $(wildcard $(srctree)/*.x509) 129X509_CERTIFICATES-$(CONFIG_MODULE_SIG) += $(objtree)/signing_key.x509 130X509_CERTIFICATES-raw := $(sort $(foreach CERT,$(X509_CERTIFICATES-y), \ 131 $(or $(realpath $(CERT)),$(CERT)))) 132X509_CERTIFICATES := $(subst $(realpath $(objtree))/,,$(X509_CERTIFICATES-raw)) 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 145kernel/system_certificates.o: $(obj)/x509_certificate_list 146 147quiet_cmd_x509certs = CERTS $@ 148 cmd_x509certs = cat $(X509_CERTIFICATES) /dev/null >$@ $(foreach X509,$(X509_CERTIFICATES),; $(kecho) " - Including cert $(X509)") 149 150targets += $(obj)/x509_certificate_list 151$(obj)/x509_certificate_list: $(X509_CERTIFICATES) $(obj)/.x509.list 152 $(call if_changed,x509certs) 153 154targets += $(obj)/.x509.list 155$(obj)/.x509.list: 156 @echo $(X509_CERTIFICATES) >$@ 157endif 158 159clean-files := x509_certificate_list .x509.list 160 161ifeq ($(CONFIG_MODULE_SIG),y) 162############################################################################### 163# 164# If module signing is requested, say by allyesconfig, but a key has not been 165# supplied, then one will need to be generated to make sure the build does not 166# fail and that the kernel may be used afterwards. 167# 168############################################################################### 169ifndef CONFIG_MODULE_SIG_HASH 170$(error Could not determine digest type to use from kernel config) 171endif 172 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" 179 @echo "### needs to be run as root, and uses a hardware random" 180 @echo "### number generator if one is available." 181 @echo "###" 182 openssl req -new -nodes -utf8 -$(CONFIG_MODULE_SIG_HASH) -days 36500 \ 183 -batch -x509 -config x509.genkey \ 184 -outform DER -out signing_key.x509 \ 185 -keyout signing_key.priv 2>&1 186 @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" 196 @echo >>x509.genkey "string_mask = utf8only" 197 @echo >>x509.genkey "x509_extensions = myexts" 198 @echo >>x509.genkey 199 @echo >>x509.genkey "[ req_distinguished_name ]" 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" 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 210