[ipxe-devel] [PATCH 1/1] [arm] add -mno-unaligned-access compiler flag

[Heinrich Schuchardt]

Without the flag a "data abort" occured when compiling with gcc 6.3 for
armhf and running on an Allwinner A20 SOC in function efi_devpath_end().

The flag is usable both with GCC and LLVM.

With some console commands enabled bin-arm32-efi/snp.efi grows from 148448
to 154464 bytes.

Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
---
 src/arch/arm32/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/arch/arm32/Makefile b/src/arch/arm32/Makefile
index 3a7c0923..fc72af11 100644
--- a/src/arch/arm32/Makefile
+++ b/src/arch/arm32/Makefile
@@ -5,6 +5,7 @@ SRCDIRS		+= arch/arm32/libgcc
 
 # ARM32-specific flags
 #
+CFLAGS		+= -mno-unaligned-access
 CFLAGS		+= -mthumb -mcpu=cortex-a15 -mabi=aapcs -mfloat-abi=soft
 CFLAGS		+= -mword-relocations
 ASFLAGS		+= -mthumb -mcpu=cortex-a15
-- 
2.11.0