Re: [Qemu-devel] [PATCH v2 5/5] linux-user: Add aarch64_be magic numbers to qemu-binfmt-conf.sh

[Laurent Vivier <laurent@vivier.eu>]

Le 19/12/2017 à 21:16, Michael Weiser a écrit :
> As we now have a linux-user aarch64_be target, we can add it to the list
> of supported targets in qemu-binfmt-conf.sh
> 
> Signed-off-by: Michael Weiser <michael.weiser@gmx.de>
> ---
>  scripts/qemu-binfmt-conf.sh | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/scripts/qemu-binfmt-conf.sh b/scripts/qemu-binfmt-conf.sh
> index 8afc3eb5bb..d69953525c 100755
> --- a/scripts/qemu-binfmt-conf.sh
> +++ b/scripts/qemu-binfmt-conf.sh
> @@ -4,7 +4,7 @@
>  
>  qemu_target_list="i386 i486 alpha arm sparc32plus ppc ppc64 ppc64le m68k \
>  mips mipsel mipsn32 mipsn32el mips64 mips64el \
> -sh4 sh4eb s390x aarch64 hppa"
> +sh4 sh4eb s390x aarch64 aarch64_be hppa"
>  
>  i386_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x03\x00'
>  i386_mask='\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
> @@ -92,6 +92,10 @@ aarch64_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x
>  aarch64_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
>  aarch64_family=arm
>  
> +aarch64_be_magic='\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7'
> +aarch64_be_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
> +aarch64_be_family=arm

You need a different family, something like "armbe", to let
qemu_set_binfmts() registers aarch64_be on aarch64 and vice-versa.

The principle is binaries of a given family can be executed natively on
the host of the same family, so we don't want to register a binfmt
handler. Is that the case between aarch64 and arch64_be?

Thanks,
Laurent