[PATCH v3 1/3] xen/arm: set -mno-unaligned-access compiler option for Arm32

[Juergen Gross <jgross@xxxxxxxx>]

As the hypervisor is disabling unaligned accesses for Arm32, set the
-mno-unaligned-access compiler option for building. This will prohibit
unaligned accesses when e.g. accessing 2- or 4-byte data items in
packed data structures.

Backport: 4.15+
Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
Acked-by: Julien Grall <jgrall@xxxxxxxxxx>
---
V2:
- new patch
---
 xen/arch/arm/arch.mk | 1 +
 1 file changed, 1 insertion(+)

diff --git a/xen/arch/arm/arch.mk b/xen/arch/arm/arch.mk
index 58db76c4e1..022dcda192 100644
--- a/xen/arch/arm/arch.mk
+++ b/xen/arch/arm/arch.mk
@@ -7,6 +7,7 @@ $(call cc-option-add,CFLAGS,CC,-Wnested-externs)
 # Prevent floating-point variables from creeping into Xen.
 CFLAGS-$(CONFIG_ARM_32) += -msoft-float
 CFLAGS-$(CONFIG_ARM_32) += -mcpu=cortex-a15
+CFLAGS-$(CONFIG_ARM_32) += -mno-unaligned-access
 
 CFLAGS-$(CONFIG_ARM_64) += -mcpu=generic
 CFLAGS-$(CONFIG_ARM_64) += -mgeneral-regs-only # No fp registers etc
-- 
2.35.3