1 files changed, 209 insertions, 0 deletions
diff --git a/kernel/Makefile b/kernel/Makefile
new file mode 100644
index 000000000..60c302cfb
--- /dev/null
+++ b/kernel/Makefile
@@ -0,0 +1,209 @@
+#
+# 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))
+$(info X.509 certificate list changed)
+$(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
+
+signing_key.priv signing_key.x509: 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 DER -out signing_key.x509 \
+		-keyout signing_key.priv 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