Commit | Line | Data |
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0a30fbc4 | 1 | /* GNU/Linux/m68k specific low level interface, for the remote server for GDB. |
f450004a | 2 | Copyright 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 |
0a30fbc4 DJ |
3 | 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 2 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, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | #include "server.h" | |
58caa3dc | 23 | #include "linux-low.h" |
0a30fbc4 DJ |
24 | |
25 | #ifdef HAVE_SYS_REG_H | |
26 | #include <sys/reg.h> | |
27 | #endif | |
28 | ||
4c0711e0 | 29 | #define m68k_num_regs 29 |
db1d3e1b | 30 | #define m68k_num_gregs 18 |
0a30fbc4 DJ |
31 | |
32 | /* This table must line up with REGISTER_NAMES in tm-m68k.h */ | |
2ec06d2e | 33 | static int m68k_regmap[] = |
0a30fbc4 DJ |
34 | { |
35 | #ifdef PT_D0 | |
36 | PT_D0 * 4, PT_D1 * 4, PT_D2 * 4, PT_D3 * 4, | |
37 | PT_D4 * 4, PT_D5 * 4, PT_D6 * 4, PT_D7 * 4, | |
38 | PT_A0 * 4, PT_A1 * 4, PT_A2 * 4, PT_A3 * 4, | |
39 | PT_A4 * 4, PT_A5 * 4, PT_A6 * 4, PT_USP * 4, | |
40 | PT_SR * 4, PT_PC * 4, | |
41 | #else | |
42 | 14 * 4, 0 * 4, 1 * 4, 2 * 4, 3 * 4, 4 * 4, 5 * 4, 6 * 4, | |
43 | 7 * 4, 8 * 4, 9 * 4, 10 * 4, 11 * 4, 12 * 4, 13 * 4, 15 * 4, | |
44 | 17 * 4, 18 * 4, | |
45 | #endif | |
46 | #ifdef PT_FP0 | |
47 | PT_FP0 * 4, PT_FP1 * 4, PT_FP2 * 4, PT_FP3 * 4, | |
48 | PT_FP4 * 4, PT_FP5 * 4, PT_FP6 * 4, PT_FP7 * 4, | |
49 | PT_FPCR * 4, PT_FPSR * 4, PT_FPIAR * 4 | |
50 | #else | |
51 | 21 * 4, 24 * 4, 27 * 4, 30 * 4, 33 * 4, 36 * 4, | |
52 | 39 * 4, 42 * 4, 45 * 4, 46 * 4, 47 * 4 | |
53 | #endif | |
54 | }; | |
55 | ||
2ec06d2e DJ |
56 | static int |
57 | m68k_cannot_store_register (int regno) | |
0a30fbc4 | 58 | { |
2ec06d2e | 59 | return (regno >= m68k_num_regs); |
0a30fbc4 DJ |
60 | } |
61 | ||
2ec06d2e DJ |
62 | static int |
63 | m68k_cannot_fetch_register (int regno) | |
0a30fbc4 | 64 | { |
2ec06d2e | 65 | return (regno >= m68k_num_regs); |
0a30fbc4 | 66 | } |
2ec06d2e | 67 | |
db1d3e1b AS |
68 | #ifdef HAVE_LINUX_REGSETS |
69 | #include <sys/procfs.h> | |
70 | #include <sys/ptrace.h> | |
71 | ||
72 | static void | |
73 | m68k_fill_gregset (void *buf) | |
74 | { | |
75 | int i; | |
76 | ||
77 | for (i = 0; i < m68k_num_gregs; i++) | |
78 | collect_register (i, (char *) buf + m68k_regmap[i]); | |
79 | } | |
80 | ||
81 | static void | |
82 | m68k_store_gregset (const void *buf) | |
83 | { | |
84 | int i; | |
85 | ||
86 | for (i = 0; i < m68k_num_gregs; i++) | |
87 | supply_register (i, (const char *) buf + m68k_regmap[i]); | |
88 | } | |
89 | ||
90 | static void | |
91 | m68k_fill_fpregset (void *buf) | |
92 | { | |
93 | int i; | |
94 | ||
95 | for (i = m68k_num_gregs; i < m68k_num_regs; i++) | |
96 | collect_register (i, ((char *) buf | |
97 | + (m68k_regmap[i] - m68k_regmap[m68k_num_gregs]))); | |
98 | } | |
99 | ||
100 | static void | |
101 | m68k_store_fpregset (const void *buf) | |
102 | { | |
103 | int i; | |
104 | ||
105 | for (i = m68k_num_gregs; i < m68k_num_regs; i++) | |
106 | supply_register (i, ((const char *) buf | |
107 | + (m68k_regmap[i] - m68k_regmap[m68k_num_gregs]))); | |
108 | } | |
109 | ||
110 | ||
111 | struct regset_info target_regsets[] = { | |
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 }, | |
118 | { 0, 0, -1, -1, NULL, NULL } | |
119 | }; | |
120 | ||
121 | #endif /* HAVE_LINUX_REGSETS */ | |
122 | ||
f450004a | 123 | static const unsigned char m68k_breakpoint[] = { 0x4E, 0x4F }; |
db1d3e1b AS |
124 | #define m68k_breakpoint_len 2 |
125 | ||
126 | static CORE_ADDR | |
127 | m68k_get_pc () | |
128 | { | |
129 | unsigned long pc; | |
130 | ||
131 | collect_register_by_name ("pc", &pc); | |
132 | return pc; | |
133 | } | |
134 | ||
135 | static void | |
136 | m68k_set_pc (CORE_ADDR value) | |
137 | { | |
138 | unsigned long newpc = value; | |
139 | ||
140 | supply_register_by_name ("pc", &newpc); | |
141 | } | |
142 | ||
143 | static int | |
144 | m68k_breakpoint_at (CORE_ADDR pc) | |
145 | { | |
146 | unsigned char c[2]; | |
147 | ||
148 | read_inferior_memory (pc, c, 2); | |
149 | if (c[0] == 0x4E && c[1] == 0x4F) | |
150 | return 1; | |
151 | ||
152 | return 0; | |
153 | } | |
154 | ||
2ec06d2e DJ |
155 | struct linux_target_ops the_low_target = { |
156 | m68k_num_regs, | |
157 | m68k_regmap, | |
158 | m68k_cannot_fetch_register, | |
159 | m68k_cannot_store_register, | |
db1d3e1b AS |
160 | m68k_get_pc, |
161 | m68k_set_pc, | |
162 | m68k_breakpoint, | |
163 | m68k_breakpoint_len, | |
164 | NULL, | |
165 | 2, | |
166 | m68k_breakpoint_at, | |
2ec06d2e | 167 | }; |