Hi Wei,
On 30/08/16 13:01, Wei Liu wrote:
The cbz instruction has range limitation. When compiled with gcov
support the object is larger so cbz can't handle that anymore. The error
message is like:
aarch64-linux-gnu-ld -EL -T xen.lds -N prelink.o \
/local/work/xen.git/xen/common/symbols-dummy.o -o
/local/work/xen.git/xen/.xen-syms.0
prelink.o: In function `launch':
/local/work/xen.git/xen/arch/arm/arm64/head.S:602:(.text+0x408): relocation
truncated to fit: R_AARCH64_CONDBR19 against symbol `start_xen' defined in
.init.text section in prelink.o
Use "b" instead.
From a quick look the size of xen doubled (776K -> 1.4M) with GCov. Xen
on ARM assumes the binary will always fit in 2MB, it might be time to
get rid of this limit.
I know that enabling UBSAN [1] will lead to a binary bigger than 2MB and
Xen will explode in early boot.
Signed-off-by: Wei Liu <wei.l...@citrix.com>
Reviewed-by: Julien Grall <julien.gr...@arm.com>
Regards,
[1]
http://developers.redhat.com/blog/2014/10/16/gcc-undefined-behavior-sanitizer-ubsan/
--
Julien Grall
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