1 /* Native-dependent code for OpenBSD/mips64.
3 Copyright (C) 2004-2019 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/>. */
25 #include <sys/types.h>
26 #include <sys/ptrace.h>
27 #include <machine/reg.h>
29 #include "mips-tdep.h"
30 #include "inf-ptrace.h"
33 /* Shorthand for some register numbers used below. */
34 #define MIPS_PC_REGNUM MIPS_EMBED_PC_REGNUM
35 #define MIPS_FP0_REGNUM MIPS_EMBED_FP0_REGNUM
36 #define MIPS_FSR_REGNUM MIPS_EMBED_FP0_REGNUM + 32
38 struct mips64_obsd_nat_target final : public obsd_nat_target
40 void fetch_registers (struct regcache *, int) override;
41 void store_registers (struct regcache *, int) override;
44 static mips64_obsd_nat_target the_mips64_obsd_nat_target;
46 /* Supply the general-purpose registers stored in GREGS to REGCACHE. */
49 mips64obsd_supply_gregset (struct regcache *regcache, const void *gregs)
51 const char *regs = gregs;
54 for (regnum = MIPS_ZERO_REGNUM; regnum <= MIPS_PC_REGNUM; regnum++)
55 regcache->raw_supply (regnum, regs + regnum * 8);
57 for (regnum = MIPS_FP0_REGNUM; regnum <= MIPS_FSR_REGNUM; regnum++)
58 regcache->raw_supply (regnum, regs + (regnum + 2) * 8);
61 /* Collect the general-purpose registers from REGCACHE and store them
65 mips64obsd_collect_gregset (const struct regcache *regcache,
66 void *gregs, int regnum)
71 for (i = MIPS_ZERO_REGNUM; i <= MIPS_PC_REGNUM; i++)
73 if (regnum == -1 || regnum == i)
74 regcache->raw_collect (i, regs + i * 8);
77 for (i = MIPS_FP0_REGNUM; i <= MIPS_FSR_REGNUM; i++)
79 if (regnum == -1 || regnum == i)
80 regcache->raw_collect (i, regs + (i + 2) * 8);
85 /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
89 mips64_obsd_nat_target::fetch_registers (struct regcache *regcache, int regnum)
92 pid_t pid = regcache->ptid ().pid ();
94 if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
95 perror_with_name (_("Couldn't get registers"));
97 mips64obsd_supply_gregset (regcache, ®s);
100 /* Store register REGNUM back into the inferior. If REGNUM is -1, do
101 this for all registers. */
104 mips64_obsd_nat_target::store_registers (struct regcache *regcache, int regnum)
107 pid_t pid = regcache->ptid ().pid ();
109 if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
110 perror_with_name (_("Couldn't get registers"));
112 mips64obsd_collect_gregset (regcache, ®s, regnum);
114 if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
115 perror_with_name (_("Couldn't write registers"));
119 _initialize_mips64obsd_nat (void)
121 add_inf_child_target (&the_mips64_obsd_nat_target);