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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; | |
daca57a7 TBA |
37 | |
38 | bool low_cannot_fetch_register (int regno) override; | |
39 | ||
40 | bool low_cannot_store_register (int regno) override; | |
ef0478f6 TBA |
41 | }; |
42 | ||
43 | /* The singleton target ops object. */ | |
44 | ||
45 | static tile_target the_tile_target; | |
46 | ||
e1f58301 JW |
47 | /* Defined in auto-generated file reg-tilegx.c. */ |
48 | void init_registers_tilegx (void); | |
3aee8918 PA |
49 | extern const struct target_desc *tdesc_tilegx; |
50 | ||
e1f58301 JW |
51 | /* Defined in auto-generated file reg-tilegx32.c. */ |
52 | void init_registers_tilegx32 (void); | |
3aee8918 | 53 | extern const struct target_desc *tdesc_tilegx32; |
65f479b6 PA |
54 | |
55 | #define tile_num_regs 65 | |
56 | ||
57 | static int tile_regmap[] = | |
58 | { | |
59 | 0, 1, 2, 3, 4, 5, 6, 7, | |
60 | 8, 9, 10, 11, 12, 13, 14, 15, | |
61 | 16, 17, 18, 19, 20, 21, 22, 23, | |
62 | 24, 25, 26, 27, 28, 29, 30, 31, | |
63 | 32, 33, 34, 35, 36, 37, 38, 39, | |
64 | 40, 41, 42, 43, 44, 45, 46, 47, | |
65 | 48, 49, 50, 51, 52, 53, 54, 55, | |
66 | -1, -1, -1, -1, -1, -1, -1, -1, | |
67 | 56 | |
68 | }; | |
69 | ||
daca57a7 TBA |
70 | bool |
71 | tile_target::low_cannot_fetch_register (int regno) | |
65f479b6 PA |
72 | { |
73 | if (regno >= 0 && regno < 56) | |
daca57a7 | 74 | return false; |
65f479b6 | 75 | else if (regno == 64) |
daca57a7 | 76 | return false; |
65f479b6 | 77 | else |
daca57a7 | 78 | return true; |
65f479b6 PA |
79 | } |
80 | ||
daca57a7 TBA |
81 | bool |
82 | tile_target::low_cannot_store_register (int regno) | |
65f479b6 PA |
83 | { |
84 | if (regno >= 0 && regno < 56) | |
daca57a7 | 85 | return false; |
65f479b6 | 86 | else if (regno == 64) |
daca57a7 | 87 | return false; |
65f479b6 | 88 | else |
daca57a7 | 89 | return true; |
65f479b6 PA |
90 | } |
91 | ||
65f479b6 PA |
92 | static uint64_t tile_breakpoint = 0x400b3cae70166000ULL; |
93 | #define tile_breakpoint_len 8 | |
94 | ||
dd373349 AT |
95 | /* Implementation of linux_target_ops method "sw_breakpoint_from_kind". */ |
96 | ||
97 | static const gdb_byte * | |
98 | tile_sw_breakpoint_from_kind (int kind, int *size) | |
99 | { | |
100 | *size = tile_breakpoint_len; | |
101 | return (const gdb_byte *) &tile_breakpoint; | |
102 | } | |
103 | ||
65f479b6 PA |
104 | static int |
105 | tile_breakpoint_at (CORE_ADDR where) | |
106 | { | |
107 | uint64_t insn; | |
108 | ||
52405d85 | 109 | the_target->read_memory (where, (unsigned char *) &insn, 8); |
65f479b6 PA |
110 | if (insn == tile_breakpoint) |
111 | return 1; | |
112 | ||
113 | /* If necessary, recognize more trap instructions here. GDB only uses the | |
114 | one. */ | |
115 | return 0; | |
116 | } | |
117 | ||
118 | static void | |
119 | tile_fill_gregset (struct regcache *regcache, void *buf) | |
120 | { | |
121 | int i; | |
122 | ||
123 | for (i = 0; i < tile_num_regs; i++) | |
124 | if (tile_regmap[i] != -1) | |
e1f58301 | 125 | collect_register (regcache, i, ((uint_reg_t *) buf) + tile_regmap[i]); |
65f479b6 PA |
126 | } |
127 | ||
128 | static void | |
129 | tile_store_gregset (struct regcache *regcache, const void *buf) | |
130 | { | |
131 | int i; | |
132 | ||
133 | for (i = 0; i < tile_num_regs; i++) | |
134 | if (tile_regmap[i] != -1) | |
e1f58301 | 135 | supply_register (regcache, i, ((uint_reg_t *) buf) + tile_regmap[i]); |
65f479b6 PA |
136 | } |
137 | ||
3aee8918 | 138 | static struct regset_info tile_regsets[] = |
65f479b6 | 139 | { |
d6707650 | 140 | { PTRACE_GETREGS, PTRACE_SETREGS, 0, tile_num_regs * 8, |
65f479b6 | 141 | GENERAL_REGS, tile_fill_gregset, tile_store_gregset }, |
50bc912a | 142 | NULL_REGSET |
65f479b6 PA |
143 | }; |
144 | ||
3aee8918 PA |
145 | static struct regsets_info tile_regsets_info = |
146 | { | |
147 | tile_regsets, /* regsets */ | |
148 | 0, /* num_regsets */ | |
149 | NULL, /* disabled_regsets */ | |
150 | }; | |
151 | ||
152 | static struct usrregs_info tile_usrregs_info = | |
153 | { | |
154 | tile_num_regs, | |
155 | tile_regmap, | |
156 | }; | |
157 | ||
aa8d21c9 | 158 | static struct regs_info myregs_info = |
3aee8918 PA |
159 | { |
160 | NULL, /* regset_bitmap */ | |
161 | &tile_usrregs_info, | |
162 | &tile_regsets_info, | |
163 | }; | |
164 | ||
aa8d21c9 TBA |
165 | const regs_info * |
166 | tile_target::get_regs_info () | |
3aee8918 | 167 | { |
aa8d21c9 | 168 | return &myregs_info; |
3aee8918 PA |
169 | } |
170 | ||
797bcff5 TBA |
171 | void |
172 | tile_target::low_arch_setup () | |
e1f58301 | 173 | { |
0bfdf32f | 174 | int pid = pid_of (current_thread); |
e1f58301 JW |
175 | unsigned int machine; |
176 | int is_elf64 = linux_pid_exe_is_elf_64_file (pid, &machine); | |
177 | ||
178 | if (sizeof (void *) == 4) | |
179 | if (is_elf64 > 0) | |
180 | error (_("Can't debug 64-bit process with 32-bit GDBserver")); | |
181 | ||
182 | if (!is_elf64) | |
3aee8918 | 183 | current_process ()->tdesc = tdesc_tilegx32; |
e1f58301 | 184 | else |
3aee8918 | 185 | current_process ()->tdesc = tdesc_tilegx; |
e1f58301 JW |
186 | } |
187 | ||
7d00775e AT |
188 | /* Support for hardware single step. */ |
189 | ||
190 | static int | |
191 | tile_supports_hardware_single_step (void) | |
192 | { | |
193 | return 1; | |
194 | } | |
195 | ||
e1f58301 | 196 | |
65f479b6 PA |
197 | struct linux_target_ops the_low_target = |
198 | { | |
65f479b6 | 199 | NULL, |
6f69e520 YQ |
200 | linux_get_pc_64bit, |
201 | linux_set_pc_64bit, | |
dd373349 AT |
202 | NULL, /* breakpoint_kind_from_pc */ |
203 | tile_sw_breakpoint_from_kind, | |
65f479b6 PA |
204 | NULL, |
205 | 0, | |
206 | tile_breakpoint_at, | |
7d00775e AT |
207 | NULL, /* supports_z_point_type */ |
208 | NULL, /* insert_point */ | |
209 | NULL, /* remove_point */ | |
210 | NULL, /* stopped_by_watchpoint */ | |
211 | NULL, /* stopped_data_address */ | |
212 | NULL, /* collect_ptrace_register */ | |
213 | NULL, /* supply_ptrace_register */ | |
214 | NULL, /* siginfo_fixup */ | |
215 | NULL, /* new_process */ | |
04ec7890 | 216 | NULL, /* delete_process */ |
7d00775e | 217 | NULL, /* new_thread */ |
466eecee | 218 | NULL, /* delete_thread */ |
7d00775e AT |
219 | NULL, /* new_fork */ |
220 | NULL, /* prepare_to_resume */ | |
221 | NULL, /* process_qsupported */ | |
222 | NULL, /* supports_tracepoints */ | |
223 | NULL, /* get_thread_area */ | |
224 | NULL, /* install_fast_tracepoint_jump_pad */ | |
225 | NULL, /* emit_ops */ | |
226 | NULL, /* get_min_fast_tracepoint_insn_len */ | |
227 | NULL, /* supports_range_stepping */ | |
228 | NULL, /* breakpoint_kind_from_current_state */ | |
229 | tile_supports_hardware_single_step, | |
65f479b6 | 230 | }; |
3aee8918 | 231 | |
ef0478f6 TBA |
232 | /* The linux target ops object. */ |
233 | ||
234 | linux_process_target *the_linux_target = &the_tile_target; | |
235 | ||
3aee8918 PA |
236 | void |
237 | initialize_low_arch (void) | |
238 | { | |
239 | init_registers_tilegx32(); | |
240 | init_registers_tilegx(); | |
241 | ||
242 | initialize_regsets_info (&tile_regsets_info); | |
243 | } |