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arm: ensure u-boot only uses relative relocations

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Add a Makefile target ('checkarmreloc') which
fails if the ELF binary contains relocation records
of types other than R_ARM_RELATIVE.

Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
Tested-by: Lubomir Popov <lpopov@mm-sol.com>
Tested-by: Jeroen Hofstee <jeroen@myspectrum.nl>
Reviewed-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
This commit is contained in:
Albert ARIBAUD 2013-06-11 14:17:30 +02:00
parent 7737c99460
commit c37980c31a
2 changed files with 12 additions and 0 deletions
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7
Makefile
View File

@ -743,6 +743,13 @@ tools: $(VERSION_FILE) $(TIMESTAMP_FILE)
$(MAKE) -C $@ all
endif # config.mk
# ARM relocations should all be R_ARM_RELATIVE.
checkarmreloc: $(obj)u-boot
@if test "R_ARM_RELATIVE" != \
"`readelf -r $< | cut -d ' ' -f 4 | grep R_ARM | sort -u`"; \
then echo "$< contains relocations other than \
R_ARM_RELATIVE"; false; fi
$(VERSION_FILE):
@mkdir -p $(dir $(VERSION_FILE))
@( localvers='$(shell $(TOPDIR)/tools/setlocalversion $(TOPDIR))' ; \

5
arch/arm/config.mk
View File

@ -109,3 +109,8 @@ ifeq ($(GAS_BUG_12532),y)
PLATFORM_RELFLAGS += -fno-optimize-sibling-calls
endif
endif
# check that only R_ARM_RELATIVE relocations are generated
ifneq ($(CONFIG_SPL_BUILD),y)
ALL-y += checkarmreloc
endif