powerpc: Send SIGBUS on unaligned copy and paste
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:Chris Smart <chris@distroguy.com> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au>
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