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/tmp/gdb-7.10/gdb/sparc64fbsd-nat.c
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1 /* Native-dependent code for FreeBSD/sparc64.
2 
3  Copyright (C) 2003-2015 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 "fbsd-nat.h"
25 #include "sparc64-tdep.h"
26 #include "sparc-nat.h"
27 
28 
29 /* Support for debugging kernel virtual memory images. */
30 
31 #include <sys/types.h>
32 #include <machine/pcb.h>
33 
34 #include "bsd-kvm.h"
35 
36 static int
37 sparc64fbsd_kvm_supply_pcb (struct regcache *regcache, struct pcb *pcb)
38 {
39  /* The following is true for FreeBSD 5.4:
40 
41  The pcb contains %sp and %pc. Since the register windows are
42  explicitly flushed, we can find the `local' and `in' registers on
43  the stack. */
44 
45  /* The stack pointer shouldn't be zero. */
46  if (pcb->pcb_sp == 0)
47  return 0;
48 
49  regcache_raw_supply (regcache, SPARC_SP_REGNUM, &pcb->pcb_sp);
50  regcache_raw_supply (regcache, SPARC64_PC_REGNUM, &pcb->pcb_pc);
51 
52  /* Synthesize %npc. */
53  pcb->pcb_pc += 4;
54  regcache_raw_supply (regcache, SPARC64_NPC_REGNUM, &pcb->pcb_pc);
55 
56  /* Read `local' and `in' registers from the stack. */
57  sparc_supply_rwindow (regcache, pcb->pcb_sp, -1);
58 
59  return 1;
60 }
61 
62 
63 /* Provide a prototype to silence -Wmissing-prototypes. */
64 void _initialize_sparc64fbsd_nat (void);
65 
66 void
68 {
69  struct target_ops *t;
70 
71  /* Add some extra features to the generic SPARC target. */
72  t = sparc_target ();
74 
76 
77  /* Support debugging kernel virtual memory images. */
79 }
void fbsd_nat_add_target(struct target_ops *t)
Definition: fbsd-nat.c:491
struct target_ops * sparc_target(void)
Definition: sparc-nat.c:333
void sparc_supply_rwindow(struct regcache *regcache, CORE_ADDR sp, int regnum)
Definition: sparc-tdep.c:1750
void _initialize_sparc64fbsd_nat(void)
void regcache_raw_supply(struct regcache *regcache, int regnum, const void *buf)
Definition: regcache.c:1041
static int sparc64fbsd_kvm_supply_pcb(struct regcache *regcache, struct pcb *pcb)
void bsd_kvm_add_target(int(*supply_pcb)(struct regcache *, struct pcb *))
Definition: bsd-kvm.c:351
const struct sparc_gregmap sparc64fbsd_gregmap