• Chris Smart's avatar
    powerpc: Send SIGBUS on unaligned copy and paste · ae26b36f
    Chris Smart authored
    Calling ISA 3.0 instructions copy, copy_first, paste and paste_last
    generates an alignment fault when copying or pasting unaligned
    data (128 byte). We catch this and send SIGBUS to the userspace
    process that caused it.
    
    We do not emulate these because paste may contain additional metadata
    when pasting to a co-processor and paste_last is the synchronisation
    point for preceding copy/paste sequences.
    
    Thanks to Michael Neuling <mikey@neuling.org> for his help.
    Signed-off-by: default avatarChris Smart <chris@distroguy.com>
    Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
    ae26b36f
ppc-opcode.h 14.5 KB