Re: [Xen-devel] [PATCH] [RFC] xsm: add a default policy to .init.data

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 23.05.16 at 16:51, <dgdegra@xxxxxxxxxxxxx> wrote:
> --- a/xen/xsm/flask/Makefile
> +++ b/xen/xsm/flask/Makefile
> @@ -27,6 +27,27 @@ $(FLASK_H_FILES): $(FLASK_H_DEPEND)
>  $(AV_H_FILES): $(AV_H_DEPEND)
>       $(CONFIG_SHELL) policy/mkaccess_vector.sh $(AWK) $(AV_H_DEPEND)
>  
> +obj-y += policy.o
> +
> +ifeq ($(XEN_TARGET_ARCH),x86_64)
> +    OBJCOPY_ARGS := -I binary -O elf64-x86-64 -B i386:x86-64
> +else ifeq ($(XEN_TARGET_ARCH),arm32)
> +    OBJCOPY_ARGS := -I binary -O elf32-littlearm -B arm
> +else ifeq ($(XEN_TARGET_ARCH),arm64)
> +    OBJCOPY_ARGS := -I binary -O elf64-littleaarch64 -B aarch64
> +else
> +    $(error "Unknown XEN_TARGET_ARCH: $(XEN_TARGET_ARCH)")
> +endif

As this is kind of ugly - did you try whether binutils can be talked
into generating an architecture neutral ELF object (using EM_NONE
as the architecture in the ELF header), and whether that could
then be linked? Of course that would be of limited use of the blob
was other than a plain stream of bytes (i.e. endian independent).

Jan


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