text: /*-
   * Copyright (c) 2003 Jake Burkholder.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   */
  
  #include <sys/cdefs.h>
  __FBSDID("$FreeBSD: src/lib/libc/sparc64/gen/signalcontext.c,v 1.2 2004/01/06 18:53:26 nectar Exp $");
  
  #include <sys/param.h>
  #include <sys/ucontext.h>
  
  #include <machine/frame.h>
  #include <machine/sigframe.h>
  
  #include <errno.h>
  #include <signal.h>
  #include <stdarg.h>
  #include <stdlib.h>
  #include <strings.h>
  #include <unistd.h>
  
  __weak_reference(__signalcontext, signalcontext);
  
  extern void _ctx_start(void);
  
  int
  __signalcontext(ucontext_t *ucp, int sig, __sighandler_t *func)
  {
  	struct sigframe *sfp;
  	struct frame *fp;
  	mcontext_t *mc;
  
  	mc = &ucp->uc_mcontext;
  	sfp = (struct sigframe *)(mc->mc_sp + SPOFF) - 1;
  	fp = (struct frame *)sfp - 1;
  
  	bzero(fp, sizeof(*fp));
  
  	bzero(sfp, sizeof(*sfp));
  	bcopy(ucp, &sfp->sf_uc, sizeof(*ucp));
  	sfp->sf_si.si_signo = sig;
  
  	mc->mc_global[1] = (uint64_t)func;
  	mc->mc_global[2] = (uint64_t)ucp;
  	mc->mc_out[0] = sig;
  	mc->mc_out[1] = (uint64_t)&sfp->sf_si;
  	mc->mc_out[2] = (uint64_t)&sfp->sf_uc;
  	mc->mc_out[6] = (uint64_t)fp - SPOFF;
  	mc->mc_tnpc = (uint64_t)_ctx_start + 4;
  	mc->mc_tpc = (uint64_t)_ctx_start;
  
  	ucp->uc_link = &sfp->sf_uc;
  	sigdelset(&ucp->uc_sigmask, sig);
  
  	return (0);
  }
  