# SPDX-License-Identifier: GPL-2.0
|
|
#
|
# This file is included by the generic Kbuild makefile to permit the
|
# architecture to perform postlink actions on vmlinux and any .ko module file.
|
# In this case, we only need it for fips140.ko, which needs some postprocessing
|
# for the integrity check mandated by FIPS. This involves making copies of the
|
# relocation sections so that the module will have access to them at
|
# initialization time, and calculating and injecting a HMAC digest into the
|
# module. All other targets are NOPs.
|
#
|
|
PHONY := __archpost
|
__archpost:
|
|
-include include/config/auto.conf
|
include scripts/Kbuild.include
|
|
CMD_FIPS140_GEN_HMAC = crypto/fips140_gen_hmac
|
quiet_cmd_gen_hmac = HMAC $@
|
cmd_gen_hmac = $(OBJCOPY) $@ \
|
--dump-section=$(shell $(READELF) -SW $@|grep -Eo '\.rela\.text\S*')=$@.rela.text \
|
--dump-section=$(shell $(READELF) -SW $@|grep -Eo '\.rela\.rodata\S*')=$@.rela.rodata \
|
--add-section=.init.rela.text=$@.rela.text \
|
--add-section=.init.rela.rodata=$@.rela.rodata \
|
--set-section-flags=.init.rela.text=alloc,readonly \
|
--set-section-flags=.init.rela.rodata=alloc,readonly && \
|
$(CMD_FIPS140_GEN_HMAC) $@
|
|
# `@true` prevents complaints when there is nothing to be done
|
|
vmlinux: FORCE
|
@true
|
|
$(objtree)/crypto/fips140.ko: FORCE
|
$(call cmd,gen_hmac)
|
|
%.ko: FORCE
|
@true
|
|
clean:
|
rm -f $(objtree)/crypto/fips140.ko.rela.*
|
|
PHONY += FORCE clean
|
|
FORCE:
|
|
.PHONY: $(PHONY)
|
