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/* Native-dependent code for FreeBSD/sparc64.

   Copyright (C) 2003, 2004, 2005, 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 "fbsd-nat.h"

#include "sparc64-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

sparc64fbsd_kvm_supply_pcb (struct regcache *regcache, struct pcb *pcb)

{

  /* The following is true for FreeBSD 5.4:

     The pcb contains %sp and %pc.  Since the register windows are

     explicitly flushed, we can find the `local' and `in' registers on

     the stack.  */

  /* 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, SPARC64_PC_REGNUM, &pcb->pcb_pc);

  /* Synthesize %npc.  */

  pcb->pcb_pc += 4;

  regcache_raw_supply (regcache, SPARC64_NPC_REGNUM, &pcb->pcb_pc);

  /* Read `local' and `in' registers from the stack.  */

  sparc_supply_rwindow (regcache, pcb->pcb_sp, -1);

  return 1;

}

/* Provide a prototype to silence -Wmissing-prototypes.  */

void _initialize_sparc64fbsd_nat (void);

void

_initialize_sparc64fbsd_nat (void)

{

  struct target_ops *t;

  /* Add some extra features to the generic SPARC target.  */

  t = sparc_target ();

  t->to_pid_to_exec_file = fbsd_pid_to_exec_file;

  t->to_find_memory_regions = fbsd_find_memory_regions;

  t->to_make_corefile_notes = fbsd_make_corefile_notes;

  add_target (t);

  sparc_gregset = &sparc64fbsd_gregset;

  /* Support debugging kernel virtual memory images.  */

  bsd_kvm_add_target (sparc64fbsd_kvm_supply_pcb);

}