flipper-linux-kernel/scripts/Makefile.modpost at test-csi · flipperdevices/flipper-linux-kernel · GitHub

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# SPDX-License-Identifier: GPL-2.0

# ===========================================================================

# Module versions

# ===========================================================================

# Stage one of module building created the following:

# a) The individual .o files used for the module

# b) A <module>.o file which is the .o files above linked together

# c) A <module>.mod file, listing the name of the preliminary <module>.o file,

# plus all .o files

# d) modules.order, which lists all the modules

# Stage 2 is handled by this file and does the following

# 1) Find all modules listed in modules.order

# 2) modpost is then used to

# 3) create one <module>.mod.c file per module

# 4) create one Module.symvers file with CRC for all exported symbols

# Step 3 is used to place certain information in the module's ELF

# section, including information such as:

# Version magic (see include/linux/vermagic.h for full details)

# - Kernel release

# - SMP is CONFIG_SMP

# - PREEMPT is CONFIG_PREEMPT[_RT]

# - GCC Version

# Module info

# - Module version (MODULE_VERSION)

# - Module alias'es (MODULE_ALIAS)

# - Module license (MODULE_LICENSE)

# - See include/linux/module.h for more details

# Step 4 is solely used to allow module versioning in external modules,

# where the CRC of each module is retrieved from the Module.symvers file.

PHONY := __modpost

__modpost:

include $(objtree)/include/config/auto.conf

include $(srctree)/scripts/Kbuild.include

MODPOST = $(objtree)/scripts/mod/modpost

modpost-args = \

$(if $(CONFIG_MODULES),-M) \

$(if $(CONFIG_MODVERSIONS),-m) \

$(if $(CONFIG_BASIC_MODVERSIONS),-b) \

$(if $(CONFIG_EXTENDED_MODVERSIONS),-x) \

$(if $(CONFIG_MODULE_SRCVERSION_ALL),-a) \

$(if $(CONFIG_SECTION_MISMATCH_WARN_ONLY),,-E) \

$(if $(KBUILD_MODPOST_WARN),-w) \

$(if $(KBUILD_NSDEPS),-d modules.nsdeps) \

$(if $(CONFIG_MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS)$(KBUILD_NSDEPS),-N) \

$(if $(findstring 1, $(KBUILD_EXTRA_WARN)),-W) \

-o $@

modpost-deps := $(MODPOST)

# 'make -i -k' ignores compile errors, and builds as many modules as possible.

ifneq ($(findstring i,$(filter-out --%,$(MAKEFLAGS))),)

modpost-args += -n

endif

# Read out modules.order to pass in modpost.

# Otherwise, allmodconfig would fail with "Argument list too long".

ifdef KBUILD_MODULES

modpost-args += -T modules.order

modpost-deps += modules.order

endif

ifeq ($(KBUILD_EXTMOD),)

# Generate the list of in-tree objects in vmlinux

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

# This is used to retrieve symbol versions generated by genksyms.

ifdef CONFIG_MODVERSIONS

vmlinux.symvers Module.symvers: .vmlinux.objs

endif

# Ignore libgcc.a

# Some architectures do '$(CC) --print-libgcc-file-name' to borrow libgcc.a

# from the toolchain, but there is no EXPORT_SYMBOL in it.

quiet_cmd_vmlinux_objs = GEN $@

cmd_vmlinux_objs = \

for f in $(real-prereqs); do \

case $${f} in \

*libgcc.a) ;; \

*) $(AR) t $${f} ;; \

esac \

done > $@

targets += .vmlinux.objs

.vmlinux.objs: vmlinux.a $(KBUILD_VMLINUX_LIBS) FORCE

$(call if_changed,vmlinux_objs)

ifdef CONFIG_TRIM_UNUSED_KSYMS

ksym-wl := $(CONFIG_UNUSED_KSYMS_WHITELIST)

ksym-wl := $(if $(filter-out /%, $(ksym-wl)),$(if $(wildcard $(ksym-wl)),,$(srctree)/))$(ksym-wl)

modpost-args += -t $(addprefix -u , $(ksym-wl))

modpost-deps += $(ksym-wl)

endif

ifeq ($(wildcard vmlinux.o),)

missing-input := vmlinux.o

output-symdump := modules-only.symvers

else

modpost-args += vmlinux.o

modpost-deps += vmlinux.o

output-symdump := $(if $(KBUILD_MODULES), Module.symvers, vmlinux.symvers)

endif

else

# set src + obj - they may be used in the modules's Makefile

obj := .

src := $(srcroot)

# Include the module's Makefile to find KBUILD_EXTRA_SYMBOLS

include $(kbuild-file)

output-symdump := Module.symvers

ifeq ($(wildcard $(objtree)/Module.symvers),)

missing-input := $(objtree)/Module.symvers

else

modpost-args += -i $(objtree)/Module.symvers

modpost-deps += $(objtree)/Module.symvers

endif

modpost-args += -e $(addprefix -i , $(KBUILD_EXTRA_SYMBOLS))

endif # ($(KBUILD_EXTMOD),)

quiet_cmd_modpost = MODPOST $@

cmd_modpost = \

$(if $(missing-input), \

echo >&2 "WARNING: $(missing-input) is missing."; \

echo >&2 " Modules may not have dependencies or modversions."; \

echo >&2 " You may get many unresolved symbol errors."; \

echo >&2 " You can set KBUILD_MODPOST_WARN=1 to turn errors into warning"; \

echo >&2 " if you want to proceed at your own risk.";) \

$(MODPOST) $(modpost-args)

targets += $(output-symdump)

$(output-symdump): $(modpost-deps) FORCE

$(call if_changed,modpost)

__modpost: $(output-symdump)

PHONY += FORCE

FORCE:

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

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

.PHONY: $(PHONY)

flipper-linux-kernel/scripts/Makefile.modpost at test-csi · flipperdevices/flipper-linux-kernel · GitHub

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