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powerpc: Use the new post-link pass to check relocations

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Currently powerpc has to introduce a dependency on its default build
target zImage in order to run a relocation check pass over the linked
vmlinux. This is deficient because the check is not run if the plain
vmlinux target is built, or if one of the other boot targets is built.

Switch to using the kbuild post-link pass, added in commit fbe6e37dab
("kbuild: add arch specific post-link Makefile") in order to run this
check. In future powerpc will use this to do more complicated operations,
but initially using it for something simple is a good first step.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Nicholas Piggin 2016-11-26 14:26:09 +11:00 committed by Michael Ellerman
parent 1cd6ed7c2e
commit f188d0524d
2 changed files with 34 additions and 11 deletions
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11
arch/powerpc/Makefile
View File

@ -274,17 +274,6 @@ PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
boot := arch/$(ARCH)/boot
ifeq ($(CONFIG_RELOCATABLE),y)
quiet_cmd_relocs_check = CALL $<
cmd_relocs_check = $(CONFIG_SHELL) $< "$(OBJDUMP)" "$(obj)/vmlinux"
PHONY += relocs_check
relocs_check: arch/powerpc/relocs_check.sh vmlinux
$(call cmd,relocs_check)
zImage: relocs_check
endif
$(BOOT_TARGETS1): vmlinux
$(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
$(BOOT_TARGETS2): vmlinux

34
arch/powerpc/Makefile.postlink Normal file
View File

@ -0,0 +1,34 @@
# ===========================================================================
# Post-link powerpc pass
# ===========================================================================
#
# 1. Check that vmlinux relocations look sane
PHONY := __archpost
__archpost:
include include/config/auto.conf
include scripts/Kbuild.include
quiet_cmd_relocs_check = CHKREL $@
cmd_relocs_check = $(CONFIG_SHELL) $(srctree)/arch/powerpc/relocs_check.sh "$(OBJDUMP)" "$@"
# `@true` prevents complaint when there is nothing to be done
vmlinux: FORCE
@true
ifdef CONFIG_RELOCATABLE
$(call if_changed,relocs_check)
endif
%.ko: FORCE
@true
clean:
@true
PHONY += FORCE clean
FORCE:
.PHONY: $(PHONY)