Hi Laurent, On Wed, Dec 20, 2017 at 03:18:34PM +0100, Laurent Vivier wrote:
> > +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? Right, while the CPU certainly is capable of switching endianess on the fly I'm not sure if there is any multilib/multiarch userland setup and kernel interface that would support mixed little/big-endianess of arm or aarch64 binaries. Even if, it would likely need further detection in the script to make sure it's there. Based on that I suspect that qemu-binfmt-conf.sh's current assignment of armeb and aarch64 into the arm CPU family is over-optimistic as well. So I'd suggest treating all of arm, armeb, aarch64 and aarch64_be as separate families. Incidentally: I noticed that armeb is missing from qemu_target_list. Is that intentional? How about the following changes, maybe split into two patches "add armeb" and "separate ARM CPU families"? diff --git a/scripts/qemu-binfmt-conf.sh b/scripts/qemu-binfmt-conf.sh index d69953525c..69ebfe7a6e 100755 --- a/scripts/qemu-binfmt-conf.sh +++ b/scripts/qemu-binfmt-conf.sh @@ -2,7 +2,7 @@ # enable automatic i386/ARM/M68K/MIPS/SPARC/PPC/s390/HPPA # program execution by the kernel -qemu_target_list="i386 i486 alpha arm sparc32plus ppc ppc64 ppc64le m68k \ +qemu_target_list="i386 i486 alpha arm armeb sparc32plus ppc ppc64 ppc64le m68k \ mips mipsel mipsn32 mipsn32el mips64 mips64el \ sh4 sh4eb s390x aarch64 aarch64_be hppa" @@ -24,7 +24,7 @@ arm_family=arm armeb_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28' armeb_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff' -armeb_family=arm +armeb_family=armeb sparc_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x02' sparc_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff' @@ -90,11 +90,11 @@ s390x_family=s390x aarch64_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7\x00' 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_family=aarch64 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 +aarch64_be_family=aarch64_be hppa_magic='\x7f\x45\x4c\x46\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x0f' hppa_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff' Okay? -- bye, Michael
