1 /* Native-dependent code for FreeBSD/arm.
3 Copyright (C) 2017-2019 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
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/>. */
23 #include <sys/types.h>
24 #include <sys/ptrace.h>
25 #include <machine/reg.h>
29 #include "arm-fbsd-tdep.h"
30 #include "inf-ptrace.h"
32 struct arm_fbsd_nat_target : public fbsd_nat_target
34 void fetch_registers (struct regcache *, int) override;
35 void store_registers (struct regcache *, int) override;
36 const struct target_desc *read_description () override;
39 static arm_fbsd_nat_target the_arm_fbsd_nat_target;
41 /* Determine if PT_GETREGS fetches REGNUM. */
44 getregs_supplies (int regnum)
46 return ((regnum >= ARM_A1_REGNUM && regnum <= ARM_PC_REGNUM)
47 || regnum == ARM_PS_REGNUM);
51 /* Determine if PT_GETVFPREGS fetches REGNUM. */
54 getvfpregs_supplies (int regnum)
56 return ((regnum >= ARM_D0_REGNUM && regnum <= ARM_D31_REGNUM)
57 || regnum == ARM_FPSCR_REGNUM);
61 /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
65 arm_fbsd_nat_target::fetch_registers (struct regcache *regcache, int regnum)
67 pid_t pid = get_ptrace_pid (regcache->ptid ());
69 if (regnum == -1 || getregs_supplies (regnum))
73 if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
74 perror_with_name (_("Couldn't get registers"));
76 regcache->supply_regset (&arm_fbsd_gregset, regnum, ®s,
81 if (regnum == -1 || getvfpregs_supplies (regnum))
83 struct vfpreg vfpregs;
85 if (ptrace (PT_GETVFPREGS, pid, (PTRACE_TYPE_ARG3) &vfpregs, 0) == -1)
86 perror_with_name (_("Couldn't get floating point status"));
88 regcache->supply_regset (&arm_fbsd_vfpregset, regnum, &vfpregs,
94 /* Store register REGNUM back into the inferior. If REGNUM is -1, do
95 this for all registers. */
98 arm_fbsd_nat_target::store_registers (struct regcache *regcache, int regnum)
100 pid_t pid = get_ptrace_pid (regcache->ptid ());
102 if (regnum == -1 || getregs_supplies (regnum))
106 if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
107 perror_with_name (_("Couldn't get registers"));
109 regcache->collect_regset (&arm_fbsd_gregset, regnum, ®s,
112 if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
113 perror_with_name (_("Couldn't write registers"));
117 if (regnum == -1 || getvfpregs_supplies (regnum))
119 struct vfpreg vfpregs;
121 if (ptrace (PT_GETVFPREGS, pid, (PTRACE_TYPE_ARG3) &vfpregs, 0) == -1)
122 perror_with_name (_("Couldn't get floating point status"));
124 regcache->collect_regset (&arm_fbsd_vfpregset, regnum, &vfpregs,
127 if (ptrace (PT_SETVFPREGS, pid, (PTRACE_TYPE_ARG3) &vfpregs, 0) == -1)
128 perror_with_name (_("Couldn't write floating point status"));
133 /* Implement the to_read_description method. */
135 const struct target_desc *
136 arm_fbsd_nat_target::read_description ()
138 const struct target_desc *desc;
140 desc = arm_fbsd_read_description_auxv (this);
142 desc = this->beneath ()->read_description ();
147 _initialize_arm_fbsd_nat (void)
149 add_inf_child_target (&the_arm_fbsd_nat_target);