[Bug ports/15493] New: AArch64 sigsetjmp always saves signal mask

["schwab at linux-m68k dot org" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=15493

             Bug #: 15493
           Summary: AArch64 sigsetjmp always saves signal mask
           Product: glibc
           Version: 2.17
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ports
        AssignedTo: unassigned@sourceware.org
        ReportedBy: schwab@linux-m68k.org
                CC: carlos@redhat.com, roland@gnu.org
    Classification: Unclassified


__sigsetjmp clobbers register x1 before making the tail call to __sigjmp_save,
which causes the latter to always save the signal mask.  Also, in ld.so the
signal mask never needs to be saved, so __sigjmp_save does not need to be
called.

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