Commit | Line | Data |
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0a30fbc4 | 1 | /* GNU/Linux/m68k specific low level interface, for the remote server for GDB. |
6aba47ca | 2 | Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, |
9b254dd1 | 3 | 2007, 2008 Free Software Foundation, Inc. |
0a30fbc4 DJ |
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 |
0a30fbc4 DJ |
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/>. */ |
0a30fbc4 DJ |
19 | |
20 | #include "server.h" | |
58caa3dc | 21 | #include "linux-low.h" |
0a30fbc4 DJ |
22 | |
23 | #ifdef HAVE_SYS_REG_H | |
24 | #include <sys/reg.h> | |
25 | #endif | |
26 | ||
4c0711e0 | 27 | #define m68k_num_regs 29 |
db1d3e1b | 28 | #define m68k_num_gregs 18 |
0a30fbc4 DJ |
29 | |
30 | /* This table must line up with REGISTER_NAMES in tm-m68k.h */ | |
2ec06d2e | 31 | static int m68k_regmap[] = |
0a30fbc4 DJ |
32 | { |
33 | #ifdef PT_D0 | |
34 | PT_D0 * 4, PT_D1 * 4, PT_D2 * 4, PT_D3 * 4, | |
35 | PT_D4 * 4, PT_D5 * 4, PT_D6 * 4, PT_D7 * 4, | |
36 | PT_A0 * 4, PT_A1 * 4, PT_A2 * 4, PT_A3 * 4, | |
37 | PT_A4 * 4, PT_A5 * 4, PT_A6 * 4, PT_USP * 4, | |
38 | PT_SR * 4, PT_PC * 4, | |
39 | #else | |
40 | 14 * 4, 0 * 4, 1 * 4, 2 * 4, 3 * 4, 4 * 4, 5 * 4, 6 * 4, | |
41 | 7 * 4, 8 * 4, 9 * 4, 10 * 4, 11 * 4, 12 * 4, 13 * 4, 15 * 4, | |
42 | 17 * 4, 18 * 4, | |
43 | #endif | |
44 | #ifdef PT_FP0 | |
45 | PT_FP0 * 4, PT_FP1 * 4, PT_FP2 * 4, PT_FP3 * 4, | |
46 | PT_FP4 * 4, PT_FP5 * 4, PT_FP6 * 4, PT_FP7 * 4, | |
47 | PT_FPCR * 4, PT_FPSR * 4, PT_FPIAR * 4 | |
48 | #else | |
49 | 21 * 4, 24 * 4, 27 * 4, 30 * 4, 33 * 4, 36 * 4, | |
50 | 39 * 4, 42 * 4, 45 * 4, 46 * 4, 47 * 4 | |
51 | #endif | |
52 | }; | |
53 | ||
2ec06d2e DJ |
54 | static int |
55 | m68k_cannot_store_register (int regno) | |
0a30fbc4 | 56 | { |
2ec06d2e | 57 | return (regno >= m68k_num_regs); |
0a30fbc4 DJ |
58 | } |
59 | ||
2ec06d2e DJ |
60 | static int |
61 | m68k_cannot_fetch_register (int regno) | |
0a30fbc4 | 62 | { |
2ec06d2e | 63 | return (regno >= m68k_num_regs); |
0a30fbc4 | 64 | } |
2ec06d2e | 65 | |
e9d25b98 | 66 | #ifdef HAVE_PTRACE_GETREGS |
db1d3e1b AS |
67 | #include <sys/procfs.h> |
68 | #include <sys/ptrace.h> | |
69 | ||
70 | static void | |
71 | m68k_fill_gregset (void *buf) | |
72 | { | |
73 | int i; | |
74 | ||
75 | for (i = 0; i < m68k_num_gregs; i++) | |
76 | collect_register (i, (char *) buf + m68k_regmap[i]); | |
77 | } | |
78 | ||
79 | static void | |
80 | m68k_store_gregset (const void *buf) | |
81 | { | |
82 | int i; | |
83 | ||
84 | for (i = 0; i < m68k_num_gregs; i++) | |
85 | supply_register (i, (const char *) buf + m68k_regmap[i]); | |
86 | } | |
87 | ||
88 | static void | |
89 | m68k_fill_fpregset (void *buf) | |
90 | { | |
91 | int i; | |
92 | ||
93 | for (i = m68k_num_gregs; i < m68k_num_regs; i++) | |
94 | collect_register (i, ((char *) buf | |
95 | + (m68k_regmap[i] - m68k_regmap[m68k_num_gregs]))); | |
96 | } | |
97 | ||
98 | static void | |
99 | m68k_store_fpregset (const void *buf) | |
100 | { | |
101 | int i; | |
102 | ||
103 | for (i = m68k_num_gregs; i < m68k_num_regs; i++) | |
104 | supply_register (i, ((const char *) buf | |
105 | + (m68k_regmap[i] - m68k_regmap[m68k_num_gregs]))); | |
106 | } | |
107 | ||
e9d25b98 | 108 | #endif /* HAVE_PTRACE_GETREGS */ |
db1d3e1b AS |
109 | |
110 | struct regset_info target_regsets[] = { | |
e9d25b98 | 111 | #ifdef HAVE_PTRACE_GETREGS |
db1d3e1b AS |
112 | { PTRACE_GETREGS, PTRACE_SETREGS, sizeof (elf_gregset_t), |
113 | GENERAL_REGS, | |
114 | m68k_fill_gregset, m68k_store_gregset }, | |
115 | { PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof (elf_fpregset_t), | |
116 | FP_REGS, | |
117 | m68k_fill_fpregset, m68k_store_fpregset }, | |
e9d25b98 | 118 | #endif /* HAVE_PTRACE_GETREGS */ |
db1d3e1b AS |
119 | { 0, 0, -1, -1, NULL, NULL } |
120 | }; | |
121 | ||
f450004a | 122 | static const unsigned char m68k_breakpoint[] = { 0x4E, 0x4F }; |
db1d3e1b AS |
123 | #define m68k_breakpoint_len 2 |
124 | ||
125 | static CORE_ADDR | |
126 | m68k_get_pc () | |
127 | { | |
128 | unsigned long pc; | |
129 | ||
130 | collect_register_by_name ("pc", &pc); | |
131 | return pc; | |
132 | } | |
133 | ||
134 | static void | |
135 | m68k_set_pc (CORE_ADDR value) | |
136 | { | |
137 | unsigned long newpc = value; | |
138 | ||
139 | supply_register_by_name ("pc", &newpc); | |
140 | } | |
141 | ||
142 | static int | |
143 | m68k_breakpoint_at (CORE_ADDR pc) | |
144 | { | |
145 | unsigned char c[2]; | |
146 | ||
147 | read_inferior_memory (pc, c, 2); | |
148 | if (c[0] == 0x4E && c[1] == 0x4F) | |
149 | return 1; | |
150 | ||
151 | return 0; | |
152 | } | |
153 | ||
2ec06d2e DJ |
154 | struct linux_target_ops the_low_target = { |
155 | m68k_num_regs, | |
156 | m68k_regmap, | |
157 | m68k_cannot_fetch_register, | |
158 | m68k_cannot_store_register, | |
db1d3e1b AS |
159 | m68k_get_pc, |
160 | m68k_set_pc, | |
161 | m68k_breakpoint, | |
162 | m68k_breakpoint_len, | |
163 | NULL, | |
164 | 2, | |
165 | m68k_breakpoint_at, | |
2ec06d2e | 166 | }; |