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abc08782 MK |
1 | /* Native-dependent code for OpenBSD/mips64. |
2 | ||
61baf725 | 3 | Copyright (C) 2004-2017 Free Software Foundation, Inc. |
abc08782 MK |
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 | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
abc08782 MK |
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 | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
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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 | ||
366e93e8 | 29 | #include "mips-tdep.h" |
abc08782 | 30 | #include "inf-ptrace.h" |
96c70aba | 31 | #include "obsd-nat.h" |
abc08782 | 32 | |
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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 | |
abc08782 MK |
37 | |
38 | /* Supply the general-purpose registers stored in GREGS to REGCACHE. */ | |
39 | ||
40 | static void | |
41 | mips64obsd_supply_gregset (struct regcache *regcache, const void *gregs) | |
42 | { | |
43 | const char *regs = gregs; | |
44 | int regnum; | |
45 | ||
366e93e8 | 46 | for (regnum = MIPS_ZERO_REGNUM; regnum <= MIPS_PC_REGNUM; regnum++) |
abc08782 | 47 | regcache_raw_supply (regcache, regnum, regs + regnum * 8); |
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48 | |
49 | for (regnum = MIPS_FP0_REGNUM; regnum <= MIPS_FSR_REGNUM; regnum++) | |
50 | regcache_raw_supply (regcache, regnum, regs + (regnum + 2) * 8); | |
abc08782 MK |
51 | } |
52 | ||
53 | /* Collect the general-purpose registers from REGCACHE and store them | |
54 | in GREGS. */ | |
55 | ||
56 | static void | |
57 | mips64obsd_collect_gregset (const struct regcache *regcache, | |
58 | void *gregs, int regnum) | |
59 | { | |
60 | char *regs = gregs; | |
61 | int i; | |
62 | ||
366e93e8 | 63 | for (i = MIPS_ZERO_REGNUM; i <= MIPS_PC_REGNUM; i++) |
abc08782 MK |
64 | { |
65 | if (regnum == -1 || regnum == i) | |
66 | regcache_raw_collect (regcache, i, regs + i * 8); | |
67 | } | |
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68 | |
69 | for (i = MIPS_FP0_REGNUM; i <= MIPS_FSR_REGNUM; i++) | |
70 | { | |
71 | if (regnum == -1 || regnum == i) | |
72 | regcache_raw_collect (regcache, i, regs + (i + 2) * 8); | |
73 | } | |
abc08782 MK |
74 | } |
75 | \f | |
76 | ||
77 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this | |
78 | for all registers. */ | |
79 | ||
80 | static void | |
28439f5e PA |
81 | mips64obsd_fetch_inferior_registers (struct target_ops *ops, |
82 | struct regcache *regcache, int regnum) | |
abc08782 MK |
83 | { |
84 | struct reg regs; | |
85 | ||
dfd4cc63 | 86 | if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid), |
abc08782 | 87 | (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
e2e0b3e5 | 88 | perror_with_name (_("Couldn't get registers")); |
abc08782 | 89 | |
56be3814 | 90 | mips64obsd_supply_gregset (regcache, ®s); |
abc08782 MK |
91 | } |
92 | ||
93 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do | |
94 | this for all registers. */ | |
95 | ||
96 | static void | |
28439f5e PA |
97 | mips64obsd_store_inferior_registers (struct target_ops *ops, |
98 | struct regcache *regcache, int regnum) | |
abc08782 MK |
99 | { |
100 | struct reg regs; | |
101 | ||
dfd4cc63 | 102 | if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid), |
abc08782 | 103 | (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
e2e0b3e5 | 104 | perror_with_name (_("Couldn't get registers")); |
abc08782 | 105 | |
56be3814 | 106 | mips64obsd_collect_gregset (regcache, ®s, regnum); |
abc08782 | 107 | |
dfd4cc63 | 108 | if (ptrace (PT_SETREGS, ptid_get_pid (inferior_ptid), |
abc08782 | 109 | (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
e2e0b3e5 | 110 | perror_with_name (_("Couldn't write registers")); |
abc08782 MK |
111 | } |
112 | \f | |
113 | ||
114 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
115 | void _initialize_mips64obsd_nat (void); | |
116 | ||
117 | void | |
118 | _initialize_mips64obsd_nat (void) | |
119 | { | |
120 | struct target_ops *t; | |
121 | ||
122 | t = inf_ptrace_target (); | |
123 | t->to_fetch_registers = mips64obsd_fetch_inferior_registers; | |
124 | t->to_store_registers = mips64obsd_store_inferior_registers; | |
96c70aba | 125 | obsd_add_target (t); |
abc08782 | 126 | } |