The movt/movw instruction can be used to hardcode an memory location in the instruction itself. The linker starts complaining about this if the compiler decides to do so: "relocation R_ARM_MOVW_ABS_NC against `a local symbol' can not be used" and it is not support by U-boot as well. Prevent their use by requiring word relocations. This allows u-boot to be build at other optimalization levels then -Os.
Signed-off-by: Jeroen Hofstee <jer...@myspectrum.nl> Cc: tiger...@viatech.com.cn Cc: Albert ARIBAUD <albert.u.b...@aribaud.net> --- arch/arm/config.mk | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/arch/arm/config.mk b/arch/arm/config.mk index 540a119..2277c82 100644 --- a/arch/arm/config.mk +++ b/arch/arm/config.mk @@ -94,7 +94,11 @@ 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 +# Check that only R_ARM_RELATIVE relocations are generated. +ALL-y += checkarmreloc +# The movt / movw can hardcode 16 bit parts of the addresses in the +# instruction. Relocation is not supported for that case, so disable +# such usage by requiring word relocations. +PLATFORM_CPPFLAGS += $(call cc-option, -mword-relocations) endif -- 1.8.1.2 _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
