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sigframe.h

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 __user *handler;         /* pointer to the plabel of the signal handler */
      struct siginfo info;
      struct sigcontext sc;
};

extern void ia64_do_signal (struct sigscratch *, long);

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