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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 | { | |
bcc0c096 SM |
50 | pid_t pid = get_ptrace_pid (regcache_get_ptid (regcache)); |
51 | ||
b268007c JB |
52 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
53 | if (regnum == -1 || getregs_supplies (gdbarch, regnum)) | |
54 | { | |
55 | struct reg regs; | |
56 | ||
bcc0c096 | 57 | if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
b268007c JB |
58 | perror_with_name (_("Couldn't get registers")); |
59 | ||
60 | mips_fbsd_supply_gregs (regcache, regnum, ®s, sizeof (register_t)); | |
61 | if (regnum != -1) | |
62 | return; | |
63 | } | |
64 | ||
65 | if (regnum == -1 | |
66 | || regnum >= gdbarch_fp0_regnum (get_regcache_arch (regcache))) | |
67 | { | |
68 | struct fpreg fpregs; | |
69 | ||
bcc0c096 | 70 | if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
b268007c JB |
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 | { | |
bcc0c096 SM |
85 | pid_t pid = get_ptrace_pid (regcache_get_ptid (regcache)); |
86 | ||
b268007c JB |
87 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
88 | if (regnum == -1 || getregs_supplies (gdbarch, regnum)) | |
89 | { | |
90 | struct reg regs; | |
91 | ||
bcc0c096 | 92 | if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
b268007c JB |
93 | perror_with_name (_("Couldn't get registers")); |
94 | ||
95 | mips_fbsd_collect_gregs (regcache, regnum, (char *) ®s, | |
96 | sizeof (register_t)); | |
97 | ||
bcc0c096 | 98 | if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
b268007c JB |
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 | ||
bcc0c096 | 110 | if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
b268007c JB |
111 | perror_with_name (_("Couldn't get floating point status")); |
112 | ||
113 | mips_fbsd_collect_fpregs (regcache, regnum, (char *) &fpregs, | |
114 | sizeof (f_register_t)); | |
115 | ||
bcc0c096 | 116 | if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
b268007c JB |
117 | perror_with_name (_("Couldn't write floating point status")); |
118 | } | |
119 | } | |
120 | \f | |
121 | ||
122 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
123 | void _initialize_mips_fbsd_nat (void); | |
124 | ||
125 | void | |
126 | _initialize_mips_fbsd_nat (void) | |
127 | { | |
128 | struct target_ops *t; | |
129 | ||
130 | t = inf_ptrace_target (); | |
131 | t->to_fetch_registers = mips_fbsd_fetch_inferior_registers; | |
132 | t->to_store_registers = mips_fbsd_store_inferior_registers; | |
133 | fbsd_nat_add_target (t); | |
134 | } |