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sparc64-fbsd-nat.c
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1/* Native-dependent code for FreeBSD/sparc64.
2
3 Copyright (C) 2003-2023 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
36static int
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 (SPARC_SP_REGNUM, &pcb->pcb_sp);
50 regcache->raw_supply (SPARC64_PC_REGNUM, &pcb->pcb_pc);
51
52 /* Synthesize %npc. */
53 pcb->pcb_pc += 4;
54 regcache->raw_supply (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/* Add some extra features to the generic SPARC target. */
64
66void
void bsd_kvm_add_target(int(*supply_pcb)(struct regcache *, struct pcb *))
Definition bsd-kvm.c:380
void raw_supply(int regnum, const void *buf) override
Definition regcache.c:1062
void add_inf_child_target(inf_child_target *target)
Definition inf-child.c:418
void sparc_supply_rwindow(struct regcache *regcache, CORE_ADDR sp, int regnum)
@ SPARC_SP_REGNUM
Definition sparc-tdep.h:118
void _initialize_sparc64fbsd_nat()
static int sparc64fbsd_kvm_supply_pcb(struct regcache *regcache, struct pcb *pcb)
static sparc_target< fbsd_nat_target > the_sparc64_fbsd_nat_target
const struct sparc_gregmap sparc64fbsd_gregmap
@ SPARC64_PC_REGNUM
@ SPARC64_NPC_REGNUM