• Mark Salter's avatar
    C6X: add support to build with BINFMT_ELF_FDPIC · fce24476
    Mark Salter authored
    C6x userspace supports a shared library mechanism called DSBT for systems with
    no MMU. DSBT is similar to FDPIC in allowing shared text segments and private
    copies of data segments without an MMU. Both methods access data using a base
    register and offset. With FDPIC, the caller of an external function sets up the
    base register for the callee. With DSBT, the called function sets up its own
    base register. Other details differ but both userspaces need the same thing
    from the kernel loader: a map of where each ELF segment was loaded. The FDPIC
    loader already provides this, so DSBT just uses it.
    
    This patch enables BINFMT_ELF_FDPIC by default for C6X and provides the
    necessary architecture hooks for the generic loader.
    Signed-off-by: 's avatarMark Salter <msalter@redhat.com>
    fce24476
Kconfig.binfmt 6.44 KB