1 /* Native-dependent code for FreeBSD/riscv.
3 Copyright (C) 2018-2019 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/>. */
24 #include <sys/types.h>
25 #include <sys/ptrace.h>
26 #include <machine/reg.h>
29 #include "riscv-tdep.h"
30 #include "riscv-fbsd-tdep.h"
31 #include "inf-ptrace.h"
33 struct riscv_fbsd_nat_target final : public fbsd_nat_target
35 void fetch_registers (struct regcache *, int) override;
36 void store_registers (struct regcache *, int) override;
39 static riscv_fbsd_nat_target the_riscv_fbsd_nat_target;
41 /* Determine if PT_GETREGS fetches REGNUM. */
44 getregs_supplies (int regnum)
46 return ((regnum >= RISCV_RA_REGNUM && regnum <= RISCV_PC_REGNUM)
47 || regnum == RISCV_CSR_SSTATUS_REGNUM);
50 /* Determine if PT_GETFPREGS fetches REGNUM. */
53 getfpregs_supplies (int regnum)
55 return ((regnum >= RISCV_FIRST_FP_REGNUM && regnum <= RISCV_LAST_FP_REGNUM)
56 || regnum == RISCV_CSR_FCSR_REGNUM);
59 /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
63 riscv_fbsd_nat_target::fetch_registers (struct regcache *regcache,
66 pid_t pid = get_ptrace_pid (regcache->ptid ());
68 if (regnum == -1 || regnum == RISCV_ZERO_REGNUM)
69 regcache->raw_supply_zeroed (RISCV_ZERO_REGNUM);
70 if (regnum == -1 || getregs_supplies (regnum))
74 if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
75 perror_with_name (_("Couldn't get registers"));
77 regcache->supply_regset (&riscv_fbsd_gregset, regnum, ®s,
81 if (regnum == -1 || getfpregs_supplies (regnum))
85 if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
86 perror_with_name (_("Couldn't get floating point status"));
88 regcache->supply_regset (&riscv_fbsd_fpregset, regnum, &fpregs,
93 /* Store register REGNUM back into the inferior. If REGNUM is -1, do
94 this for all registers. */
97 riscv_fbsd_nat_target::store_registers (struct regcache *regcache,
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 (&riscv_fbsd_gregset, regnum, ®s,
112 if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
113 perror_with_name (_("Couldn't write registers"));
116 if (regnum == -1 || getfpregs_supplies (regnum))
120 if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
121 perror_with_name (_("Couldn't get floating point status"));
123 regcache->collect_regset (&riscv_fbsd_fpregset, regnum, &fpregs,
126 if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
127 perror_with_name (_("Couldn't write floating point status"));
132 _initialize_riscv_fbsd_nat (void)
134 add_inf_child_target (&the_riscv_fbsd_nat_target);