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