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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
commit5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch)
treea94efe259b9009378be6d90eb30d2b019d95c194 /scripts/Makefile.modpost
parentInitial commit. (diff)
downloadlinux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.tar.xz
linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.zip
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'scripts/Makefile.modpost')
-rw-r--r--scripts/Makefile.modpost141
1 files changed, 141 insertions, 0 deletions
diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost
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+++ b/scripts/Makefile.modpost
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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 pr. 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.
+
+# KBUILD_MODPOST_WARN can be set to avoid error out in case of undefined
+# symbols in the final module linking stage
+# KBUILD_MODPOST_NOFINAL can be set to skip the final link of modules.
+# This is solely useful to speed up test compiles
+
+PHONY := __modpost
+__modpost:
+
+include include/config/auto.conf
+include scripts/Kbuild.include
+
+MODPOST = scripts/mod/modpost \
+ $(if $(CONFIG_MODVERSIONS),-m) \
+ $(if $(CONFIG_MODULE_SRCVERSION_ALL),-a) \
+ $(if $(CONFIG_SECTION_MISMATCH_WARN_ONLY),,-E) \
+ $(if $(KBUILD_MODPOST_WARN),-w) \
+ -o $@
+
+ifdef MODPOST_VMLINUX
+
+quiet_cmd_modpost = MODPOST $@
+ cmd_modpost = $(MODPOST) $<
+
+vmlinux.symvers: vmlinux.o
+ $(call cmd,modpost)
+
+__modpost: vmlinux.symvers
+
+else
+
+ifeq ($(KBUILD_EXTMOD),)
+
+input-symdump := vmlinux.symvers
+output-symdump := modules-only.symvers
+
+quiet_cmd_cat = GEN $@
+ cmd_cat = cat $(real-prereqs) > $@
+
+ifneq ($(wildcard vmlinux.symvers),)
+
+__modpost: Module.symvers
+Module.symvers: vmlinux.symvers modules-only.symvers FORCE
+ $(call if_changed,cat)
+
+targets += Module.symvers
+
+endif
+
+else
+
+# set src + obj - they may be used in the modules's Makefile
+obj := $(KBUILD_EXTMOD)
+src := $(obj)
+
+# Include the module's Makefile to find KBUILD_EXTRA_SYMBOLS
+include $(if $(wildcard $(src)/Kbuild), $(src)/Kbuild, $(src)/Makefile)
+
+# modpost option for external modules
+MODPOST += -e
+
+input-symdump := Module.symvers $(KBUILD_EXTRA_SYMBOLS)
+output-symdump := $(KBUILD_EXTMOD)/Module.symvers
+
+endif
+
+# modpost options for modules (both in-kernel and external)
+MODPOST += \
+ $(addprefix -i ,$(wildcard $(input-symdump))) \
+ $(if $(KBUILD_NSDEPS),-d $(MODULES_NSDEPS)) \
+ $(if $(CONFIG_MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS)$(KBUILD_NSDEPS),-N)
+
+# 'make -i -k' ignores compile errors, and builds as many modules as possible.
+ifneq ($(findstring i,$(filter-out --%,$(MAKEFLAGS))),)
+MODPOST += -n
+endif
+
+# Clear VPATH to not search for *.symvers in $(srctree). Check only $(objtree).
+VPATH :=
+$(input-symdump):
+ @echo >&2 'WARNING: Symbol version dump "$@" is missing.'
+ @echo >&2 ' Modules may not have dependencies or modversions.'
+
+# Read out modules.order to pass in modpost.
+# Otherwise, allmodconfig would fail with "Argument list too long".
+quiet_cmd_modpost = MODPOST $@
+ cmd_modpost = sed 's/ko$$/o/' $< | $(MODPOST) -T -
+
+$(output-symdump): $(MODORDER) $(input-symdump) FORCE
+ $(call if_changed,modpost)
+
+targets += $(output-symdump)
+
+__modpost: $(output-symdump)
+ifneq ($(KBUILD_MODPOST_NOFINAL),1)
+ $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal
+endif
+
+PHONY += FORCE
+FORCE:
+
+existing-targets := $(wildcard $(sort $(targets)))
+
+-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
+
+endif
+
+.PHONY: $(PHONY)