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struct sigscratch {

        unsigned long scratch_unat;     /* ar.unat for the general registers saved in pt */

        unsigned long ar_pfs;           /* for syscalls, the user-level function-state  */

        struct pt_regs pt;

};

struct sigframe {

        /*

         * Place signal handler args where user-level unwinder can find them easily.

         * DO NOT MOVE THESE.  They are part of the IA-64 Linux ABI and there is

         * user-level code that depends on their presence!

         */

        unsigned long arg0;             /* signum */

        unsigned long arg1;             /* siginfo pointer */

        unsigned long arg2;             /* sigcontext pointer */

        /*

         * End of architected state.

         */

        void *handler;                  /* pointer to the plabel of the signal handler */

        struct siginfo info;

        struct sigcontext sc;

};