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1 | /* Native-dependent code for NetBSD/sh. | |
2 | ||
3 | Copyright (C) 2002-2020 Free Software Foundation, Inc. | |
4 | ||
5 | Contributed by Wasabi Systems, Inc. | |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 3 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
21 | ||
22 | #include "defs.h" | |
23 | #include "inferior.h" | |
24 | ||
25 | #include <sys/types.h> | |
26 | #include <sys/ptrace.h> | |
27 | #include <machine/reg.h> | |
28 | ||
29 | #include "sh-tdep.h" | |
30 | #include "inf-ptrace.h" | |
31 | #include "nbsd-nat.h" | |
32 | #include "regcache.h" | |
33 | ||
34 | struct sh_nbsd_nat_target final : public nbsd_nat_target | |
35 | { | |
36 | void fetch_registers (struct regcache *, int) override; | |
37 | void store_registers (struct regcache *, int) override; | |
38 | }; | |
39 | ||
40 | static sh_nbsd_nat_target the_sh_nbsd_nat_target; | |
41 | ||
42 | /* Determine if PT_GETREGS fetches this register. */ | |
43 | #define GETREGS_SUPPLIES(gdbarch, regno) \ | |
44 | (((regno) >= R0_REGNUM && (regno) <= (R0_REGNUM + 15)) \ | |
45 | || (regno) == gdbarch_pc_regnum (gdbarch) || (regno) == PR_REGNUM \ | |
46 | || (regno) == MACH_REGNUM || (regno) == MACL_REGNUM \ | |
47 | || (regno) == SR_REGNUM) | |
48 | ||
49 | /* Sizeof `struct reg' in <machine/reg.h>. */ | |
50 | #define SHNBSD_SIZEOF_GREGS (21 * 4) | |
51 | ||
52 | void | |
53 | sh_nbsd_nat_target::fetch_registers (struct regcache *regcache, int regno) | |
54 | { | |
55 | pid_t pid = regcache->ptid ().pid (); | |
56 | int lwp = regcache->ptid ().lwp (); | |
57 | ||
58 | if (regno == -1 || GETREGS_SUPPLIES (regcache->arch (), regno)) | |
59 | { | |
60 | struct reg inferior_registers; | |
61 | ||
62 | if (ptrace (PT_GETREGS, pid, | |
63 | (PTRACE_TYPE_ARG3) &inferior_registers, lwp) == -1) | |
64 | perror_with_name (_("Couldn't get registers")); | |
65 | ||
66 | sh_corefile_supply_regset (&sh_corefile_gregset, regcache, regno, | |
67 | (char *) &inferior_registers, | |
68 | SHNBSD_SIZEOF_GREGS); | |
69 | ||
70 | if (regno != -1) | |
71 | return; | |
72 | } | |
73 | } | |
74 | ||
75 | void | |
76 | sh_nbsd_nat_target::store_registers (struct regcache *regcache, int regno) | |
77 | { | |
78 | pid_t pid = regcache->ptid ().pid (); | |
79 | int lwp = regcache->ptid ().lwp (); | |
80 | ||
81 | if (regno == -1 || GETREGS_SUPPLIES (regcache->arch (), regno)) | |
82 | { | |
83 | struct reg inferior_registers; | |
84 | ||
85 | if (ptrace (PT_GETREGS, pid, | |
86 | (PTRACE_TYPE_ARG3) &inferior_registers, lwp) == -1) | |
87 | perror_with_name (_("Couldn't get registers")); | |
88 | ||
89 | sh_corefile_collect_regset (&sh_corefile_gregset, regcache, regno, | |
90 | (char *) &inferior_registers, | |
91 | SHNBSD_SIZEOF_GREGS); | |
92 | ||
93 | if (ptrace (PT_SETREGS, pid, | |
94 | (PTRACE_TYPE_ARG3) &inferior_registers, lwp) == -1) | |
95 | perror_with_name (_("Couldn't set registers")); | |
96 | ||
97 | if (regno != -1) | |
98 | return; | |
99 | } | |
100 | } | |
101 | ||
102 | void _initialize_shnbsd_nat (); | |
103 | void | |
104 | _initialize_shnbsd_nat () | |
105 | { | |
106 | add_inf_child_target (&the_sh_nbsd_nat_target); | |
107 | } |