1/* Native-dependent code for NetBSD/sparc.
2
3   Copyright (C) 2002, 2003, 2004, 2007 Free Software Foundation, Inc.
4
5   This file is part of GDB.
6
7   This program is free software; you can redistribute it and/or modify
8   it under the terms of the GNU General Public License as published by
9   the Free Software Foundation; either version 3 of the License, or
10   (at your option) any later version.
11
12   This program is distributed in the hope that it will be useful,
13   but WITHOUT ANY WARRANTY; without even the implied warranty of
14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15   GNU General Public License for more details.
16
17   You should have received a copy of the GNU General Public License
18   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
19
20#include "defs.h"
21#include "regcache.h"
22#include "target.h"
23
24#include "sparc-tdep.h"
25#include "sparc-nat.h"
26
27/* Support for debugging kernel virtual memory images.  */
28
29#include <sys/types.h>
30#include <machine/pcb.h>
31
32#include "bsd-kvm.h"
33
34static int
35sparc32nbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
36{
37  /* The following is true for NetBSD 1.6.2:
38
39     The pcb contains %sp, %pc, %psr and %wim.  From this information
40     we reconstruct the register state as it would look when we just
41     returned from cpu_switch().  */
42
43  /* The stack pointer shouldn't be zero.  */
44  if (pcb->pcb_sp == 0)
45    return 0;
46
47  regcache_raw_supply (regcache, SPARC_SP_REGNUM, &pcb->pcb_sp);
48  regcache_raw_supply (regcache, SPARC_O7_REGNUM, &pcb->pcb_pc);
49  regcache_raw_supply (regcache, SPARC32_PSR_REGNUM, &pcb->pcb_psr);
50  regcache_raw_supply (regcache, SPARC32_WIM_REGNUM, &pcb->pcb_wim);
51  regcache_raw_supply (regcache, SPARC32_PC_REGNUM, &pcb->pcb_pc);
52
53  sparc_supply_rwindow (regcache, pcb->pcb_sp, -1);
54
55  return 1;
56}
57
58
59/* Provide a prototype to silence -Wmissing-prototypes.  */
60void _initialize_sparcnbsd_nat (void);
61
62void
63_initialize_sparcnbsd_nat (void)
64{
65  sparc_gregset = &sparc32nbsd_gregset;
66
67  /* We've got nothing to add to the generic SPARC target.  */
68  add_target (sparc_target ());
69
70  /* Support debugging kernel virtual memory images.  */
71  bsd_kvm_add_target (sparc32nbsd_supply_pcb);
72}
73