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65f479b6 PA |
1 | /* GNU/Linux/TILE-Gx specific low level interface, GDBserver. |
2 | ||
32d0add0 | 3 | Copyright (C) 2012-2015 Free Software Foundation, Inc. |
65f479b6 PA |
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 3 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, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "server.h" | |
21 | #include "linux-low.h" | |
22 | ||
e1f58301 | 23 | #include <arch/abi.h> |
5826e159 | 24 | #include "nat/gdb_ptrace.h" |
65f479b6 | 25 | |
e1f58301 JW |
26 | /* Defined in auto-generated file reg-tilegx.c. */ |
27 | void init_registers_tilegx (void); | |
3aee8918 PA |
28 | extern const struct target_desc *tdesc_tilegx; |
29 | ||
e1f58301 JW |
30 | /* Defined in auto-generated file reg-tilegx32.c. */ |
31 | void init_registers_tilegx32 (void); | |
3aee8918 | 32 | extern const struct target_desc *tdesc_tilegx32; |
65f479b6 PA |
33 | |
34 | #define tile_num_regs 65 | |
35 | ||
36 | static int tile_regmap[] = | |
37 | { | |
38 | 0, 1, 2, 3, 4, 5, 6, 7, | |
39 | 8, 9, 10, 11, 12, 13, 14, 15, | |
40 | 16, 17, 18, 19, 20, 21, 22, 23, | |
41 | 24, 25, 26, 27, 28, 29, 30, 31, | |
42 | 32, 33, 34, 35, 36, 37, 38, 39, | |
43 | 40, 41, 42, 43, 44, 45, 46, 47, | |
44 | 48, 49, 50, 51, 52, 53, 54, 55, | |
45 | -1, -1, -1, -1, -1, -1, -1, -1, | |
46 | 56 | |
47 | }; | |
48 | ||
49 | static int | |
50 | tile_cannot_fetch_register (int regno) | |
51 | { | |
52 | if (regno >= 0 && regno < 56) | |
53 | return 0; | |
54 | else if (regno == 64) | |
55 | return 0; | |
56 | else | |
57 | return 1; | |
58 | } | |
59 | ||
60 | static int | |
61 | tile_cannot_store_register (int regno) | |
62 | { | |
63 | if (regno >= 0 && regno < 56) | |
64 | return 0; | |
65 | else if (regno == 64) | |
66 | return 0; | |
67 | else | |
68 | return 1; | |
69 | } | |
70 | ||
71 | static CORE_ADDR | |
72 | tile_get_pc (struct regcache *regcache) | |
73 | { | |
74 | unsigned long pc; | |
75 | ||
76 | collect_register_by_name (regcache, "pc", &pc); | |
77 | return pc; | |
78 | } | |
79 | ||
80 | static void | |
81 | tile_set_pc (struct regcache *regcache, CORE_ADDR pc) | |
82 | { | |
83 | unsigned long newpc = pc; | |
84 | ||
85 | supply_register_by_name (regcache, "pc", &newpc); | |
86 | } | |
87 | ||
88 | static uint64_t tile_breakpoint = 0x400b3cae70166000ULL; | |
89 | #define tile_breakpoint_len 8 | |
90 | ||
dd373349 AT |
91 | /* Implementation of linux_target_ops method "sw_breakpoint_from_kind". */ |
92 | ||
93 | static const gdb_byte * | |
94 | tile_sw_breakpoint_from_kind (int kind, int *size) | |
95 | { | |
96 | *size = tile_breakpoint_len; | |
97 | return (const gdb_byte *) &tile_breakpoint; | |
98 | } | |
99 | ||
65f479b6 PA |
100 | static int |
101 | tile_breakpoint_at (CORE_ADDR where) | |
102 | { | |
103 | uint64_t insn; | |
104 | ||
105 | (*the_target->read_memory) (where, (unsigned char *) &insn, 8); | |
106 | if (insn == tile_breakpoint) | |
107 | return 1; | |
108 | ||
109 | /* If necessary, recognize more trap instructions here. GDB only uses the | |
110 | one. */ | |
111 | return 0; | |
112 | } | |
113 | ||
114 | static void | |
115 | tile_fill_gregset (struct regcache *regcache, void *buf) | |
116 | { | |
117 | int i; | |
118 | ||
119 | for (i = 0; i < tile_num_regs; i++) | |
120 | if (tile_regmap[i] != -1) | |
e1f58301 | 121 | collect_register (regcache, i, ((uint_reg_t *) buf) + tile_regmap[i]); |
65f479b6 PA |
122 | } |
123 | ||
124 | static void | |
125 | tile_store_gregset (struct regcache *regcache, const void *buf) | |
126 | { | |
127 | int i; | |
128 | ||
129 | for (i = 0; i < tile_num_regs; i++) | |
130 | if (tile_regmap[i] != -1) | |
e1f58301 | 131 | supply_register (regcache, i, ((uint_reg_t *) buf) + tile_regmap[i]); |
65f479b6 PA |
132 | } |
133 | ||
3aee8918 | 134 | static struct regset_info tile_regsets[] = |
65f479b6 | 135 | { |
d6707650 | 136 | { PTRACE_GETREGS, PTRACE_SETREGS, 0, tile_num_regs * 8, |
65f479b6 | 137 | GENERAL_REGS, tile_fill_gregset, tile_store_gregset }, |
50bc912a | 138 | NULL_REGSET |
65f479b6 PA |
139 | }; |
140 | ||
3aee8918 PA |
141 | static struct regsets_info tile_regsets_info = |
142 | { | |
143 | tile_regsets, /* regsets */ | |
144 | 0, /* num_regsets */ | |
145 | NULL, /* disabled_regsets */ | |
146 | }; | |
147 | ||
148 | static struct usrregs_info tile_usrregs_info = | |
149 | { | |
150 | tile_num_regs, | |
151 | tile_regmap, | |
152 | }; | |
153 | ||
154 | static struct regs_info regs_info = | |
155 | { | |
156 | NULL, /* regset_bitmap */ | |
157 | &tile_usrregs_info, | |
158 | &tile_regsets_info, | |
159 | }; | |
160 | ||
161 | static const struct regs_info * | |
162 | tile_regs_info (void) | |
163 | { | |
164 | return ®s_info; | |
165 | } | |
166 | ||
e1f58301 JW |
167 | static void |
168 | tile_arch_setup (void) | |
169 | { | |
0bfdf32f | 170 | int pid = pid_of (current_thread); |
e1f58301 JW |
171 | unsigned int machine; |
172 | int is_elf64 = linux_pid_exe_is_elf_64_file (pid, &machine); | |
173 | ||
174 | if (sizeof (void *) == 4) | |
175 | if (is_elf64 > 0) | |
176 | error (_("Can't debug 64-bit process with 32-bit GDBserver")); | |
177 | ||
178 | if (!is_elf64) | |
3aee8918 | 179 | current_process ()->tdesc = tdesc_tilegx32; |
e1f58301 | 180 | else |
3aee8918 | 181 | current_process ()->tdesc = tdesc_tilegx; |
e1f58301 JW |
182 | } |
183 | ||
184 | ||
65f479b6 PA |
185 | struct linux_target_ops the_low_target = |
186 | { | |
e1f58301 | 187 | tile_arch_setup, |
3aee8918 | 188 | tile_regs_info, |
65f479b6 PA |
189 | tile_cannot_fetch_register, |
190 | tile_cannot_store_register, | |
191 | NULL, | |
192 | tile_get_pc, | |
193 | tile_set_pc, | |
dd373349 AT |
194 | NULL, /* breakpoint_kind_from_pc */ |
195 | tile_sw_breakpoint_from_kind, | |
65f479b6 PA |
196 | NULL, |
197 | 0, | |
198 | tile_breakpoint_at, | |
199 | }; | |
3aee8918 PA |
200 | |
201 | void | |
202 | initialize_low_arch (void) | |
203 | { | |
204 | init_registers_tilegx32(); | |
205 | init_registers_tilegx(); | |
206 | ||
207 | initialize_regsets_info (&tile_regsets_info); | |
208 | } |