1/* Native-dependent code for FreeBSD/arm.
2
3   Copyright (C) 2017-2023 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 "inferior.h"
22#include "target.h"
23
24#include "elf/common.h"
25
26#include <sys/types.h>
27#include <sys/ptrace.h>
28#include <machine/reg.h>
29
30#include "fbsd-nat.h"
31#include "arm-tdep.h"
32#include "arm-fbsd-tdep.h"
33#include "inf-ptrace.h"
34
35struct arm_fbsd_nat_target : public fbsd_nat_target
36{
37  void fetch_registers (struct regcache *, int) override;
38  void store_registers (struct regcache *, int) override;
39  const struct target_desc *read_description () override;
40};
41
42static arm_fbsd_nat_target the_arm_fbsd_nat_target;
43
44/* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
45   for all registers.  */
46
47void
48arm_fbsd_nat_target::fetch_registers (struct regcache *regcache, int regnum)
49{
50  fetch_register_set<struct reg> (regcache, regnum, PT_GETREGS,
51				  &arm_fbsd_gregset);
52#ifdef PT_GETVFPREGS
53  fetch_register_set<struct vfpreg> (regcache, regnum, PT_GETVFPREGS,
54				     &arm_fbsd_vfpregset);
55#endif
56#ifdef PT_GETREGSET
57  gdbarch *gdbarch = regcache->arch ();
58  arm_gdbarch_tdep *tdep = gdbarch_tdep<arm_gdbarch_tdep> (gdbarch);
59
60  if (tdep->tls_regnum > 0)
61    fetch_regset<uint32_t> (regcache, regnum, NT_ARM_TLS, &arm_fbsd_tls_regset,
62			    tdep->tls_regnum);
63#endif
64}
65
66/* Store register REGNUM back into the inferior.  If REGNUM is -1, do
67   this for all registers.  */
68
69void
70arm_fbsd_nat_target::store_registers (struct regcache *regcache, int regnum)
71{
72  store_register_set<struct reg> (regcache, regnum, PT_GETREGS, PT_SETREGS,
73				  &arm_fbsd_gregset);
74#ifdef PT_GETVFPREGS
75  store_register_set<struct vfpreg> (regcache, regnum, PT_GETVFPREGS,
76				     PT_SETVFPREGS, &arm_fbsd_vfpregset);
77#endif
78#ifdef PT_GETREGSET
79  gdbarch *gdbarch = regcache->arch ();
80  arm_gdbarch_tdep *tdep = gdbarch_tdep<arm_gdbarch_tdep> (gdbarch);
81
82  if (tdep->tls_regnum > 0)
83    store_regset<uint32_t> (regcache, regnum, NT_ARM_TLS, &arm_fbsd_tls_regset,
84			    tdep->tls_regnum);
85#endif
86}
87
88/* Implement the to_read_description method.  */
89
90const struct target_desc *
91arm_fbsd_nat_target::read_description ()
92{
93  const struct target_desc *desc;
94  bool tls = false;
95
96#ifdef PT_GETREGSET
97  tls = have_regset (inferior_ptid, NT_ARM_TLS) != 0;
98#endif
99  desc = arm_fbsd_read_description_auxv (tls);
100  if (desc == NULL)
101    desc = this->beneath ()->read_description ();
102  return desc;
103}
104
105void _initialize_arm_fbsd_nat ();
106void
107_initialize_arm_fbsd_nat ()
108{
109  add_inf_child_target (&the_arm_fbsd_nat_target);
110}
111