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, |
0fb0cc75 | 3 | 2007, 2008, 2009 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 | 22 | |
d05b4ac3 UW |
23 | /* Defined in auto-generated file reg-m68k.c. */ |
24 | void init_registers_m68k (void); | |
25 | ||
0a30fbc4 DJ |
26 | #ifdef HAVE_SYS_REG_H |
27 | #include <sys/reg.h> | |
28 | #endif | |
29 | ||
4c0711e0 | 30 | #define m68k_num_regs 29 |
db1d3e1b | 31 | #define m68k_num_gregs 18 |
0a30fbc4 DJ |
32 | |
33 | /* This table must line up with REGISTER_NAMES in tm-m68k.h */ | |
2ec06d2e | 34 | static int m68k_regmap[] = |
0a30fbc4 DJ |
35 | { |
36 | #ifdef PT_D0 | |
37 | PT_D0 * 4, PT_D1 * 4, PT_D2 * 4, PT_D3 * 4, | |
38 | PT_D4 * 4, PT_D5 * 4, PT_D6 * 4, PT_D7 * 4, | |
39 | PT_A0 * 4, PT_A1 * 4, PT_A2 * 4, PT_A3 * 4, | |
40 | PT_A4 * 4, PT_A5 * 4, PT_A6 * 4, PT_USP * 4, | |
41 | PT_SR * 4, PT_PC * 4, | |
42 | #else | |
43 | 14 * 4, 0 * 4, 1 * 4, 2 * 4, 3 * 4, 4 * 4, 5 * 4, 6 * 4, | |
44 | 7 * 4, 8 * 4, 9 * 4, 10 * 4, 11 * 4, 12 * 4, 13 * 4, 15 * 4, | |
45 | 17 * 4, 18 * 4, | |
46 | #endif | |
47 | #ifdef PT_FP0 | |
48 | PT_FP0 * 4, PT_FP1 * 4, PT_FP2 * 4, PT_FP3 * 4, | |
49 | PT_FP4 * 4, PT_FP5 * 4, PT_FP6 * 4, PT_FP7 * 4, | |
50 | PT_FPCR * 4, PT_FPSR * 4, PT_FPIAR * 4 | |
51 | #else | |
52 | 21 * 4, 24 * 4, 27 * 4, 30 * 4, 33 * 4, 36 * 4, | |
53 | 39 * 4, 42 * 4, 45 * 4, 46 * 4, 47 * 4 | |
54 | #endif | |
55 | }; | |
56 | ||
2ec06d2e DJ |
57 | static int |
58 | m68k_cannot_store_register (int regno) | |
0a30fbc4 | 59 | { |
2ec06d2e | 60 | return (regno >= m68k_num_regs); |
0a30fbc4 DJ |
61 | } |
62 | ||
2ec06d2e DJ |
63 | static int |
64 | m68k_cannot_fetch_register (int regno) | |
0a30fbc4 | 65 | { |
2ec06d2e | 66 | return (regno >= m68k_num_regs); |
0a30fbc4 | 67 | } |
2ec06d2e | 68 | |
e9d25b98 | 69 | #ifdef HAVE_PTRACE_GETREGS |
db1d3e1b AS |
70 | #include <sys/procfs.h> |
71 | #include <sys/ptrace.h> | |
72 | ||
73 | static void | |
74 | m68k_fill_gregset (void *buf) | |
75 | { | |
76 | int i; | |
77 | ||
78 | for (i = 0; i < m68k_num_gregs; i++) | |
79 | collect_register (i, (char *) buf + m68k_regmap[i]); | |
80 | } | |
81 | ||
82 | static void | |
83 | m68k_store_gregset (const void *buf) | |
84 | { | |
85 | int i; | |
86 | ||
87 | for (i = 0; i < m68k_num_gregs; i++) | |
88 | supply_register (i, (const char *) buf + m68k_regmap[i]); | |
89 | } | |
90 | ||
91 | static void | |
92 | m68k_fill_fpregset (void *buf) | |
93 | { | |
94 | int i; | |
95 | ||
96 | for (i = m68k_num_gregs; i < m68k_num_regs; i++) | |
97 | collect_register (i, ((char *) buf | |
98 | + (m68k_regmap[i] - m68k_regmap[m68k_num_gregs]))); | |
99 | } | |
100 | ||
101 | static void | |
102 | m68k_store_fpregset (const void *buf) | |
103 | { | |
104 | int i; | |
105 | ||
106 | for (i = m68k_num_gregs; i < m68k_num_regs; i++) | |
107 | supply_register (i, ((const char *) buf | |
108 | + (m68k_regmap[i] - m68k_regmap[m68k_num_gregs]))); | |
109 | } | |
110 | ||
e9d25b98 | 111 | #endif /* HAVE_PTRACE_GETREGS */ |
db1d3e1b AS |
112 | |
113 | struct regset_info target_regsets[] = { | |
e9d25b98 | 114 | #ifdef HAVE_PTRACE_GETREGS |
db1d3e1b AS |
115 | { PTRACE_GETREGS, PTRACE_SETREGS, sizeof (elf_gregset_t), |
116 | GENERAL_REGS, | |
117 | m68k_fill_gregset, m68k_store_gregset }, | |
118 | { PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof (elf_fpregset_t), | |
119 | FP_REGS, | |
120 | m68k_fill_fpregset, m68k_store_fpregset }, | |
e9d25b98 | 121 | #endif /* HAVE_PTRACE_GETREGS */ |
db1d3e1b AS |
122 | { 0, 0, -1, -1, NULL, NULL } |
123 | }; | |
124 | ||
f450004a | 125 | static const unsigned char m68k_breakpoint[] = { 0x4E, 0x4F }; |
db1d3e1b AS |
126 | #define m68k_breakpoint_len 2 |
127 | ||
128 | static CORE_ADDR | |
129 | m68k_get_pc () | |
130 | { | |
131 | unsigned long pc; | |
132 | ||
133 | collect_register_by_name ("pc", &pc); | |
134 | return pc; | |
135 | } | |
136 | ||
137 | static void | |
138 | m68k_set_pc (CORE_ADDR value) | |
139 | { | |
140 | unsigned long newpc = value; | |
141 | ||
142 | supply_register_by_name ("pc", &newpc); | |
143 | } | |
144 | ||
145 | static int | |
146 | m68k_breakpoint_at (CORE_ADDR pc) | |
147 | { | |
148 | unsigned char c[2]; | |
149 | ||
150 | read_inferior_memory (pc, c, 2); | |
151 | if (c[0] == 0x4E && c[1] == 0x4F) | |
152 | return 1; | |
153 | ||
154 | return 0; | |
155 | } | |
156 | ||
2ec06d2e | 157 | struct linux_target_ops the_low_target = { |
d05b4ac3 | 158 | init_registers_m68k, |
2ec06d2e DJ |
159 | m68k_num_regs, |
160 | m68k_regmap, | |
161 | m68k_cannot_fetch_register, | |
162 | m68k_cannot_store_register, | |
db1d3e1b AS |
163 | m68k_get_pc, |
164 | m68k_set_pc, | |
165 | m68k_breakpoint, | |
166 | m68k_breakpoint_len, | |
167 | NULL, | |
168 | 2, | |
169 | m68k_breakpoint_at, | |
2ec06d2e | 170 | }; |