+# vmlinux is build from the objects selected by $(vmlinux-init) and
+# $(vmlinux-main). Most are built-in.o files from top-level directories
+# in the kernel tree, others are specified in arch/$(ARCH)Makefile.
+# Ordering when linking is important, and $(vmlinux-init) must be first.
+#
+# vmlinux
+# ^
+# |
+# +-< $(vmlinux-init)
+# | +--< init/version.o + more
+# |
+# +--< $(vmlinux-main)
+# | +--< driver/built-in.o mm/built-in.o + more
+# |
+# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
+#
+# vmlinux version (uname -v) cannot be updated during normal
+# descending-into-subdirs phase since we do not yet know if we need to
+# update vmlinux.
+# Therefore this step is delayed until just before final link of vmlinux -
+# except in the kallsyms case where it is done just before adding the
+# symbols to the kernel.
+#
+# System.map is generated to document addresses of all kernel symbols
+
+vmlinux-init := $(head-y) $(init-y)
+vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
+vmlinux-all := $(vmlinux-init) $(vmlinux-main)
+vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
+
+# Rule to link vmlinux - also used during CONFIG_KALLSYMS
+# May be overridden by arch/$(ARCH)/Makefile
+quiet_cmd_vmlinux__ ?= LD $@
+ cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
+ -T $(vmlinux-lds) $(vmlinux-init) \
+ --start-group $(vmlinux-main) --end-group \
+ $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
+
+# Generate new vmlinux version
+quiet_cmd_vmlinux_version = GEN .version
+ cmd_vmlinux_version = set -e; \
+ . $(srctree)/scripts/mkversion > .tmp_version; \
+ mv -f .tmp_version .version; \
+ $(MAKE) $(build)=init
+
+# Generate System.map
+quiet_cmd_sysmap = SYSMAP
+ cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
+
+# Link of vmlinux
+# If CONFIG_KALLSYMS is set .version is already updated
+# Generate System.map and verify that the content is consistent