# SPDX-License-Identifier: GPL-2.0-only

PHONY := __default

__default: vmlinux

include include/config/auto.conf

include $(srctree)/scripts/Kbuild.include

include $(srctree)/scripts/Makefile.lib

targets :=

%.o: %.c FORCE

$(call if_changed_rule,cc_o_c)

%.o: %.S FORCE

$(call if_changed_rule,as_o_S)

# Built-in dtb

# ---------------------------------------------------------------------------

quiet_cmd_wrap_dtbs = WRAP $@

cmd_wrap_dtbs = { \

echo '\#include <asm-generic/vmlinux.lds.h>'; \

echo '.section .dtb.init.rodata,"a"'; \

while read dtb; do \

symbase=__dtb_$$(basename -s .dtb "$${dtb}" | tr - _); \

echo '.balign STRUCT_ALIGNMENT'; \

echo ".global $${symbase}_begin"; \

echo "$${symbase}_begin:"; \

echo '.incbin "'$$dtb'" '; \

echo ".global $${symbase}_end"; \

echo "$${symbase}_end:"; \

done < $<; \

} > $@

.builtin-dtbs.S: .builtin-dtbs-list FORCE

$(call if_changed,wrap_dtbs)

quiet_cmd_gen_dtbs_list = GEN $@

cmd_gen_dtbs_list = \

$(if $(CONFIG_BUILTIN_DTB_NAME), echo "arch/$(SRCARCH)/boot/dts/$(CONFIG_BUILTIN_DTB_NAME).dtb",:) > $@

.builtin-dtbs-list: arch/$(SRCARCH)/boot/dts/dtbs-list FORCE

$(call if_changed,$(if $(CONFIG_BUILTIN_DTB_ALL),copy,gen_dtbs_list))

targets += .builtin-dtbs-list

ifdef CONFIG_GENERIC_BUILTIN_DTB

targets += .builtin-dtbs.S .builtin-dtbs.o

vmlinux.unstripped: .builtin-dtbs.o

endif

# vmlinux.unstripped

# ---------------------------------------------------------------------------

ifdef CONFIG_ARCH_WANTS_PRE_LINK_VMLINUX

vmlinux.unstripped: arch/$(SRCARCH)/tools/vmlinux.arch.o

arch/$(SRCARCH)/tools/vmlinux.arch.o: vmlinux.o FORCE

$(Q)$(MAKE) $(build)=arch/$(SRCARCH)/tools $@

endif

ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)

# Final link of vmlinux with optional arch pass after final link

cmd_link_vmlinux = \

$< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)" "$@"; \

$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)

targets += vmlinux.unstripped .vmlinux.export.o

vmlinux.unstripped: scripts/link-vmlinux.sh vmlinux.o .vmlinux.export.o $(KBUILD_LDS) FORCE

+$(call if_changed_dep,link_vmlinux)

ifdef CONFIG_DEBUG_INFO_BTF

vmlinux.unstripped: $(RESOLVE_BTFIDS)

endif

ifdef CONFIG_BUILDTIME_TABLE_SORT

vmlinux.unstripped: scripts/sorttable

endif

# vmlinux

# ---------------------------------------------------------------------------

remove-section-y := .modinfo

remove-section-$(CONFIG_ARCH_VMLINUX_NEEDS_RELOCS) += '.rel*' '!.rel*.dyn'

# for compatibility with binutils < 2.32

# https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=c12d9fa2afe7abcbe407a00e15719e1a1350c2a7

remove-section-$(CONFIG_ARCH_VMLINUX_NEEDS_RELOCS) += '.rel.*'

remove-symbols := -w --strip-unneeded-symbol='__mod_device_table__*'

# To avoid warnings: "empty loadable segment detected at ..." from GNU objcopy,

# it is necessary to remove the PT_LOAD flag from the segment.

quiet_cmd_strip_relocs = OBJCOPY $@

cmd_strip_relocs = $(OBJCOPY) $(patsubst %,--set-section-flags %=noload,$(remove-section-y)) $< $@; \

$(OBJCOPY) $(addprefix --remove-section=,$(remove-section-y)) $(remove-symbols) $@

targets += vmlinux

vmlinux: vmlinux.unstripped FORCE

$(call if_changed,strip_relocs)

# modules.builtin.modinfo

# ---------------------------------------------------------------------------

# .modinfo in vmlinux.unstripped is aligned to 8 bytes for compatibility with

# tools that expect vmlinux to have sufficiently aligned sections but the

# additional bytes used for padding .modinfo to satisfy this requirement break

# certain versions of kmod with

#

# depmod: ERROR: kmod_builtin_iter_next: unexpected string without modname prefix

#

# Strip the trailing padding bytes after extracting .modinfo to comply with

# what kmod expects to parse.

quiet_cmd_modules_builtin_modinfo = GEN $@

cmd_modules_builtin_modinfo = $(cmd_objcopy); \

sed -i 's/\x00\+$$/\x00/g' $@

OBJCOPYFLAGS_modules.builtin.modinfo := -j .modinfo -O binary

targets += modules.builtin.modinfo

modules.builtin.modinfo: vmlinux.unstripped FORCE

$(call if_changed,modules_builtin_modinfo)

# modules.builtin

# ---------------------------------------------------------------------------

__default: modules.builtin

# The second line aids cases where multiple modules share the same object.

quiet_cmd_modules_builtin = GEN $@

cmd_modules_builtin = \

tr '\0' '\n' < $< | \

sed -n 's/^[[:alnum:]:_]*\.file=//p' | \

tr ' ' '\n' | uniq | sed -e 's:^:kernel/:' -e 's/$$/.ko/' > $@

targets += modules.builtin

modules.builtin: modules.builtin.modinfo FORCE

$(call if_changed,modules_builtin)

# modules.builtin.ranges

# ---------------------------------------------------------------------------

ifdef CONFIG_BUILTIN_MODULE_RANGES

__default: modules.builtin.ranges

quiet_cmd_modules_builtin_ranges = GEN $@

cmd_modules_builtin_ranges = gawk -f $(real-prereqs) > $@

targets += modules.builtin.ranges

modules.builtin.ranges: $(srctree)/scripts/generate_builtin_ranges.awk \

modules.builtin vmlinux.map vmlinux.o.map FORCE

$(call if_changed,modules_builtin_ranges)

vmlinux.map: vmlinux.unstripped

@:

endif

# Add FORCE to the prerequisites of a target to force it to be always rebuilt.

# ---------------------------------------------------------------------------

PHONY += FORCE

FORCE:

# Read all saved command lines and dependencies for the $(targets) we

# may be building above, using $(if_changed{,_dep}). As an

# optimization, we don't need to read them if the target does not

# exist, we will rebuild anyway in that case.

existing-targets := $(wildcard $(sort $(targets)))

-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)

.PHONY: $(PHONY)