• Chris Metcalf's avatar
    tile: implement gettimeofday() via vDSO · 4a556f4f
    Chris Metcalf authored
    This change creates the framework for vDSO calls, makes the existing
    rt_sigreturn() mechanism use it, and adds a fast gettimeofday().
    Now that we need to expose the vDSO address to userspace, we add
    AT_SYSINFO_EHDR to the set of aux entries provided to userspace.
    (You can disable any extra vDSO support by booting with vdso=0,
    but the rt_sigreturn vDSO page will still be provided.)
    
    Note that glibc has supported the tile vDSO since release 2.17.
    Signed-off-by: default avatarChris Metcalf <cmetcalf@tilera.com>
    4a556f4f
page.h 10.3 KB