Commit | Line | Data |
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65f479b6 PA |
1 | /* GNU/Linux/TILE-Gx specific low level interface, GDBserver. |
2 | ||
b811d2c2 | 3 | Copyright (C) 2012-2020 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 | |
ef0478f6 TBA |
26 | /* Linux target op definitions for the TILE-Gx architecture. */ |
27 | ||
28 | class tile_target : public linux_process_target | |
29 | { | |
30 | public: | |
31 | ||
aa8d21c9 TBA |
32 | const regs_info *get_regs_info () override; |
33 | ||
797bcff5 TBA |
34 | protected: |
35 | ||
36 | void low_arch_setup () override; | |
ef0478f6 TBA |
37 | }; |
38 | ||
39 | /* The singleton target ops object. */ | |
40 | ||
41 | static tile_target the_tile_target; | |
42 | ||
e1f58301 JW |
43 | /* Defined in auto-generated file reg-tilegx.c. */ |
44 | void init_registers_tilegx (void); | |
3aee8918 PA |
45 | extern const struct target_desc *tdesc_tilegx; |
46 | ||
e1f58301 JW |
47 | /* Defined in auto-generated file reg-tilegx32.c. */ |
48 | void init_registers_tilegx32 (void); | |
3aee8918 | 49 | extern const struct target_desc *tdesc_tilegx32; |
65f479b6 PA |
50 | |
51 | #define tile_num_regs 65 | |
52 | ||
53 | static int tile_regmap[] = | |
54 | { | |
55 | 0, 1, 2, 3, 4, 5, 6, 7, | |
56 | 8, 9, 10, 11, 12, 13, 14, 15, | |
57 | 16, 17, 18, 19, 20, 21, 22, 23, | |
58 | 24, 25, 26, 27, 28, 29, 30, 31, | |
59 | 32, 33, 34, 35, 36, 37, 38, 39, | |
60 | 40, 41, 42, 43, 44, 45, 46, 47, | |
61 | 48, 49, 50, 51, 52, 53, 54, 55, | |
62 | -1, -1, -1, -1, -1, -1, -1, -1, | |
63 | 56 | |
64 | }; | |
65 | ||
66 | static int | |
67 | tile_cannot_fetch_register (int regno) | |
68 | { | |
69 | if (regno >= 0 && regno < 56) | |
70 | return 0; | |
71 | else if (regno == 64) | |
72 | return 0; | |
73 | else | |
74 | return 1; | |
75 | } | |
76 | ||
77 | static int | |
78 | tile_cannot_store_register (int regno) | |
79 | { | |
80 | if (regno >= 0 && regno < 56) | |
81 | return 0; | |
82 | else if (regno == 64) | |
83 | return 0; | |
84 | else | |
85 | return 1; | |
86 | } | |
87 | ||
65f479b6 PA |
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 | ||
52405d85 | 105 | the_target->read_memory (where, (unsigned char *) &insn, 8); |
65f479b6 PA |
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 | ||
aa8d21c9 | 154 | static struct regs_info myregs_info = |
3aee8918 PA |
155 | { |
156 | NULL, /* regset_bitmap */ | |
157 | &tile_usrregs_info, | |
158 | &tile_regsets_info, | |
159 | }; | |
160 | ||
aa8d21c9 TBA |
161 | const regs_info * |
162 | tile_target::get_regs_info () | |
3aee8918 | 163 | { |
aa8d21c9 | 164 | return &myregs_info; |
3aee8918 PA |
165 | } |
166 | ||
797bcff5 TBA |
167 | void |
168 | tile_target::low_arch_setup () | |
e1f58301 | 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 | ||
7d00775e AT |
184 | /* Support for hardware single step. */ |
185 | ||
186 | static int | |
187 | tile_supports_hardware_single_step (void) | |
188 | { | |
189 | return 1; | |
190 | } | |
191 | ||
e1f58301 | 192 | |
65f479b6 PA |
193 | struct linux_target_ops the_low_target = |
194 | { | |
65f479b6 PA |
195 | tile_cannot_fetch_register, |
196 | tile_cannot_store_register, | |
197 | NULL, | |
6f69e520 YQ |
198 | linux_get_pc_64bit, |
199 | linux_set_pc_64bit, | |
dd373349 AT |
200 | NULL, /* breakpoint_kind_from_pc */ |
201 | tile_sw_breakpoint_from_kind, | |
65f479b6 PA |
202 | NULL, |
203 | 0, | |
204 | tile_breakpoint_at, | |
7d00775e AT |
205 | NULL, /* supports_z_point_type */ |
206 | NULL, /* insert_point */ | |
207 | NULL, /* remove_point */ | |
208 | NULL, /* stopped_by_watchpoint */ | |
209 | NULL, /* stopped_data_address */ | |
210 | NULL, /* collect_ptrace_register */ | |
211 | NULL, /* supply_ptrace_register */ | |
212 | NULL, /* siginfo_fixup */ | |
213 | NULL, /* new_process */ | |
04ec7890 | 214 | NULL, /* delete_process */ |
7d00775e | 215 | NULL, /* new_thread */ |
466eecee | 216 | NULL, /* delete_thread */ |
7d00775e AT |
217 | NULL, /* new_fork */ |
218 | NULL, /* prepare_to_resume */ | |
219 | NULL, /* process_qsupported */ | |
220 | NULL, /* supports_tracepoints */ | |
221 | NULL, /* get_thread_area */ | |
222 | NULL, /* install_fast_tracepoint_jump_pad */ | |
223 | NULL, /* emit_ops */ | |
224 | NULL, /* get_min_fast_tracepoint_insn_len */ | |
225 | NULL, /* supports_range_stepping */ | |
226 | NULL, /* breakpoint_kind_from_current_state */ | |
227 | tile_supports_hardware_single_step, | |
65f479b6 | 228 | }; |
3aee8918 | 229 | |
ef0478f6 TBA |
230 | /* The linux target ops object. */ |
231 | ||
232 | linux_process_target *the_linux_target = &the_tile_target; | |
233 | ||
3aee8918 PA |
234 | void |
235 | initialize_low_arch (void) | |
236 | { | |
237 | init_registers_tilegx32(); | |
238 | init_registers_tilegx(); | |
239 | ||
240 | initialize_regsets_info (&tile_regsets_info); | |
241 | } |