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/* Native-dependent code for NetBSD/sparc.
 
   Copyright (C) 2002, 2003, 2004, 2007, 2008, 2009, 2010
   Free Software Foundation, Inc.
 
   This file is part of GDB.
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.
 
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
 
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
#include "defs.h"
#include "regcache.h"
#include "target.h"
 
#include "sparc-tdep.h"
#include "sparc-nat.h"
 
/* Support for debugging kernel virtual memory images.  */
 
#include <sys/types.h>
#include <machine/pcb.h>
 
#include "bsd-kvm.h"
 
static int
sparc32nbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
{
  /* The following is true for NetBSD 1.6.2:
 
     The pcb contains %sp, %pc, %psr and %wim.  From this information
     we reconstruct the register state as it would look when we just
     returned from cpu_switch().  */
 
  /* The stack pointer shouldn't be zero.  */
  if (pcb->pcb_sp == 0)
    return 0;
 
  regcache_raw_supply (regcache, SPARC_SP_REGNUM, &pcb->pcb_sp);
  regcache_raw_supply (regcache, SPARC_O7_REGNUM, &pcb->pcb_pc);
  regcache_raw_supply (regcache, SPARC32_PSR_REGNUM, &pcb->pcb_psr);
  regcache_raw_supply (regcache, SPARC32_WIM_REGNUM, &pcb->pcb_wim);
  regcache_raw_supply (regcache, SPARC32_PC_REGNUM, &pcb->pcb_pc);
 
  sparc_supply_rwindow (regcache, pcb->pcb_sp, -1);
 
  return 1;
}

 
/* Provide a prototype to silence -Wmissing-prototypes.  */
void _initialize_sparcnbsd_nat (void);
 
void
_initialize_sparcnbsd_nat (void)
{
  sparc_gregset = &sparc32nbsd_gregset;
 
  /* We've got nothing to add to the generic SPARC target.  */
  add_target (sparc_target ());
 
  /* Support debugging kernel virtual memory images.  */
  bsd_kvm_add_target (sparc32nbsd_supply_pcb);
}