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authorAlbert ARIBAUD <albert.u.boot@aribaud.net>2012-10-09 09:28:15 +0000
committerTom Rini <trini@ti.com>2012-10-15 11:53:07 -0700
commitb823fd9ba56d56e3cbb5b05e7a4815fb0914204a (patch)
treeb93f7f8ba2874cd0478aee2f96718aedf4031ce7 /arch/arm/cpu/armv7
parent6528ff0109d81c1f21d20f9f1370782bccf87bcb (diff)
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ARM: prevent misaligned array inits
Under option -munaligned-access, gcc can perform local char or 16-bit array initializations using misaligned native accesses which will throw a data abort exception. Fix files where these array initializations were unneeded, and for files known to contain such initializations, enforce gcc option -mno-unaligned-access. Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net> [trini: Switch to usign call cc-option for -mno-unaligned-access as Albert had done previously as that's really correct] Signed-off-by: Tom Rini <trini@ti.com>
Diffstat (limited to 'arch/arm/cpu/armv7')
-rw-r--r--arch/arm/cpu/armv7/config.mk7
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/arm/cpu/armv7/config.mk b/arch/arm/cpu/armv7/config.mk
index 560c084..9c3e2f3 100644
--- a/arch/arm/cpu/armv7/config.mk
+++ b/arch/arm/cpu/armv7/config.mk
@@ -26,8 +26,6 @@ PLATFORM_RELFLAGS += -fno-common -ffixed-r8 -msoft-float
# supported by more tool-chains
PF_CPPFLAGS_ARMV7 := $(call cc-option, -march=armv7-a, -march=armv5)
PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARMV7)
-PF_CPPFLAGS_NO_UNALIGNED := $(call cc-option, -mno-unaligned-access,)
-PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_NO_UNALIGNED)
# =========================================================================
#
@@ -36,6 +34,11 @@ PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_NO_UNALIGNED)
# =========================================================================
PF_RELFLAGS_SLB_AT := $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
PLATFORM_RELFLAGS += $(PF_RELFLAGS_SLB_AT)
+
+# SEE README.arm-unaligned-accesses
+PF_NO_UNALIGNED := $(call cc-option, -mno-unaligned-access,)
+PLATFORM_NO_UNALIGNED := $(PF_NO_UNALIGNED)
+
ifneq ($(CONFIG_IMX_CONFIG),)
ALL-y += $(obj)u-boot.imx
endif