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b268007c JB |
1 | /* Native-dependent code for FreeBSD/mips. |
2 | ||
3 | Copyright (C) 2017 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 "regcache.h" | |
23 | #include "target.h" | |
24 | ||
25 | #include <sys/types.h> | |
26 | #include <sys/ptrace.h> | |
27 | #include <machine/reg.h> | |
28 | ||
29 | #include "fbsd-nat.h" | |
30 | #include "mips-tdep.h" | |
31 | #include "mips-fbsd-tdep.h" | |
32 | #include "inf-ptrace.h" | |
33 | ||
34 | /* Determine if PT_GETREGS fetches this register. */ | |
35 | ||
36 | static bool | |
37 | getregs_supplies (struct gdbarch *gdbarch, int regnum) | |
38 | { | |
39 | return (regnum >= MIPS_ZERO_REGNUM | |
40 | && regnum <= gdbarch_pc_regnum (gdbarch)); | |
41 | } | |
42 | ||
43 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this | |
44 | for all registers. */ | |
45 | ||
46 | static void | |
47 | mips_fbsd_fetch_inferior_registers (struct target_ops *ops, | |
48 | struct regcache *regcache, int regnum) | |
49 | { | |
50 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
51 | if (regnum == -1 || getregs_supplies (gdbarch, regnum)) | |
52 | { | |
53 | struct reg regs; | |
54 | ||
55 | if (ptrace (PT_GETREGS, get_ptrace_pid (inferior_ptid), | |
56 | (PTRACE_TYPE_ARG3) ®s, 0) == -1) | |
57 | perror_with_name (_("Couldn't get registers")); | |
58 | ||
59 | mips_fbsd_supply_gregs (regcache, regnum, ®s, sizeof (register_t)); | |
60 | if (regnum != -1) | |
61 | return; | |
62 | } | |
63 | ||
64 | if (regnum == -1 | |
65 | || regnum >= gdbarch_fp0_regnum (get_regcache_arch (regcache))) | |
66 | { | |
67 | struct fpreg fpregs; | |
68 | ||
69 | if (ptrace (PT_GETFPREGS, get_ptrace_pid (inferior_ptid), | |
70 | (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) | |
71 | perror_with_name (_("Couldn't get floating point status")); | |
72 | ||
73 | mips_fbsd_supply_fpregs (regcache, regnum, &fpregs, | |
74 | sizeof (f_register_t)); | |
75 | } | |
76 | } | |
77 | ||
78 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do | |
79 | this for all registers. */ | |
80 | ||
81 | static void | |
82 | mips_fbsd_store_inferior_registers (struct target_ops *ops, | |
83 | struct regcache *regcache, int regnum) | |
84 | { | |
85 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
86 | if (regnum == -1 || getregs_supplies (gdbarch, regnum)) | |
87 | { | |
88 | struct reg regs; | |
89 | ||
90 | if (ptrace (PT_GETREGS, get_ptrace_pid (inferior_ptid), | |
91 | (PTRACE_TYPE_ARG3) ®s, 0) == -1) | |
92 | perror_with_name (_("Couldn't get registers")); | |
93 | ||
94 | mips_fbsd_collect_gregs (regcache, regnum, (char *) ®s, | |
95 | sizeof (register_t)); | |
96 | ||
97 | if (ptrace (PT_SETREGS, get_ptrace_pid (inferior_ptid), | |
98 | (PTRACE_TYPE_ARG3) ®s, 0) == -1) | |
99 | perror_with_name (_("Couldn't write registers")); | |
100 | ||
101 | if (regnum != -1) | |
102 | return; | |
103 | } | |
104 | ||
105 | if (regnum == -1 | |
106 | || regnum >= gdbarch_fp0_regnum (get_regcache_arch (regcache))) | |
107 | { | |
108 | struct fpreg fpregs; | |
109 | ||
110 | if (ptrace (PT_GETFPREGS, get_ptrace_pid (inferior_ptid), | |
111 | (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) | |
112 | perror_with_name (_("Couldn't get floating point status")); | |
113 | ||
114 | mips_fbsd_collect_fpregs (regcache, regnum, (char *) &fpregs, | |
115 | sizeof (f_register_t)); | |
116 | ||
117 | if (ptrace (PT_SETFPREGS, get_ptrace_pid (inferior_ptid), | |
118 | (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) | |
119 | perror_with_name (_("Couldn't write floating point status")); | |
120 | } | |
121 | } | |
122 | \f | |
123 | ||
124 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
125 | void _initialize_mips_fbsd_nat (void); | |
126 | ||
127 | void | |
128 | _initialize_mips_fbsd_nat (void) | |
129 | { | |
130 | struct target_ops *t; | |
131 | ||
132 | t = inf_ptrace_target (); | |
133 | t->to_fetch_registers = mips_fbsd_fetch_inferior_registers; | |
134 | t->to_store_registers = mips_fbsd_store_inferior_registers; | |
135 | fbsd_nat_add_target (t); | |
136 | } |