Commit | Line | Data |
---|---|---|
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 | ||
3ca4edb6 TBA |
34 | const gdb_byte *sw_breakpoint_from_kind (int kind, int *size) override; |
35 | ||
797bcff5 TBA |
36 | protected: |
37 | ||
38 | void low_arch_setup () override; | |
daca57a7 TBA |
39 | |
40 | bool low_cannot_fetch_register (int regno) override; | |
41 | ||
42 | bool low_cannot_store_register (int regno) override; | |
bf9ae9d8 TBA |
43 | |
44 | bool low_supports_breakpoints () override; | |
45 | ||
46 | CORE_ADDR low_get_pc (regcache *regcache) override; | |
47 | ||
48 | void low_set_pc (regcache *regcache, CORE_ADDR newpc) override; | |
d7146cda TBA |
49 | |
50 | bool low_breakpoint_at (CORE_ADDR pc) override; | |
ef0478f6 TBA |
51 | }; |
52 | ||
53 | /* The singleton target ops object. */ | |
54 | ||
55 | static tile_target the_tile_target; | |
56 | ||
bf9ae9d8 TBA |
57 | bool |
58 | tile_target::low_supports_breakpoints () | |
59 | { | |
60 | return true; | |
61 | } | |
62 | ||
63 | CORE_ADDR | |
64 | tile_target::low_get_pc (regcache *regcache) | |
65 | { | |
66 | return linux_get_pc_64bit (regcache); | |
67 | } | |
68 | ||
69 | void | |
70 | tile_target::low_set_pc (regcache *regcache, CORE_ADDR pc) | |
71 | { | |
72 | linux_set_pc_64bit (regcache, pc); | |
73 | } | |
74 | ||
e1f58301 JW |
75 | /* Defined in auto-generated file reg-tilegx.c. */ |
76 | void init_registers_tilegx (void); | |
3aee8918 PA |
77 | extern const struct target_desc *tdesc_tilegx; |
78 | ||
e1f58301 JW |
79 | /* Defined in auto-generated file reg-tilegx32.c. */ |
80 | void init_registers_tilegx32 (void); | |
3aee8918 | 81 | extern const struct target_desc *tdesc_tilegx32; |
65f479b6 PA |
82 | |
83 | #define tile_num_regs 65 | |
84 | ||
85 | static int tile_regmap[] = | |
86 | { | |
87 | 0, 1, 2, 3, 4, 5, 6, 7, | |
88 | 8, 9, 10, 11, 12, 13, 14, 15, | |
89 | 16, 17, 18, 19, 20, 21, 22, 23, | |
90 | 24, 25, 26, 27, 28, 29, 30, 31, | |
91 | 32, 33, 34, 35, 36, 37, 38, 39, | |
92 | 40, 41, 42, 43, 44, 45, 46, 47, | |
93 | 48, 49, 50, 51, 52, 53, 54, 55, | |
94 | -1, -1, -1, -1, -1, -1, -1, -1, | |
95 | 56 | |
96 | }; | |
97 | ||
daca57a7 TBA |
98 | bool |
99 | tile_target::low_cannot_fetch_register (int regno) | |
65f479b6 PA |
100 | { |
101 | if (regno >= 0 && regno < 56) | |
daca57a7 | 102 | return false; |
65f479b6 | 103 | else if (regno == 64) |
daca57a7 | 104 | return false; |
65f479b6 | 105 | else |
daca57a7 | 106 | return true; |
65f479b6 PA |
107 | } |
108 | ||
daca57a7 TBA |
109 | bool |
110 | tile_target::low_cannot_store_register (int regno) | |
65f479b6 PA |
111 | { |
112 | if (regno >= 0 && regno < 56) | |
daca57a7 | 113 | return false; |
65f479b6 | 114 | else if (regno == 64) |
daca57a7 | 115 | return false; |
65f479b6 | 116 | else |
daca57a7 | 117 | return true; |
65f479b6 PA |
118 | } |
119 | ||
65f479b6 PA |
120 | static uint64_t tile_breakpoint = 0x400b3cae70166000ULL; |
121 | #define tile_breakpoint_len 8 | |
122 | ||
3ca4edb6 | 123 | /* Implementation of target ops method "sw_breakpoint_from_kind". */ |
dd373349 | 124 | |
3ca4edb6 TBA |
125 | const gdb_byte * |
126 | tile_target::sw_breakpoint_from_kind (int kind, int *size) | |
dd373349 AT |
127 | { |
128 | *size = tile_breakpoint_len; | |
129 | return (const gdb_byte *) &tile_breakpoint; | |
130 | } | |
131 | ||
d7146cda TBA |
132 | bool |
133 | tile_target::low_breakpoint_at (CORE_ADDR where) | |
65f479b6 PA |
134 | { |
135 | uint64_t insn; | |
136 | ||
d7146cda | 137 | read_memory (where, (unsigned char *) &insn, 8); |
65f479b6 | 138 | if (insn == tile_breakpoint) |
d7146cda | 139 | return true; |
65f479b6 PA |
140 | |
141 | /* If necessary, recognize more trap instructions here. GDB only uses the | |
142 | one. */ | |
d7146cda | 143 | return false; |
65f479b6 PA |
144 | } |
145 | ||
146 | static void | |
147 | tile_fill_gregset (struct regcache *regcache, void *buf) | |
148 | { | |
149 | int i; | |
150 | ||
151 | for (i = 0; i < tile_num_regs; i++) | |
152 | if (tile_regmap[i] != -1) | |
e1f58301 | 153 | collect_register (regcache, i, ((uint_reg_t *) buf) + tile_regmap[i]); |
65f479b6 PA |
154 | } |
155 | ||
156 | static void | |
157 | tile_store_gregset (struct regcache *regcache, const void *buf) | |
158 | { | |
159 | int i; | |
160 | ||
161 | for (i = 0; i < tile_num_regs; i++) | |
162 | if (tile_regmap[i] != -1) | |
e1f58301 | 163 | supply_register (regcache, i, ((uint_reg_t *) buf) + tile_regmap[i]); |
65f479b6 PA |
164 | } |
165 | ||
3aee8918 | 166 | static struct regset_info tile_regsets[] = |
65f479b6 | 167 | { |
d6707650 | 168 | { PTRACE_GETREGS, PTRACE_SETREGS, 0, tile_num_regs * 8, |
65f479b6 | 169 | GENERAL_REGS, tile_fill_gregset, tile_store_gregset }, |
50bc912a | 170 | NULL_REGSET |
65f479b6 PA |
171 | }; |
172 | ||
3aee8918 PA |
173 | static struct regsets_info tile_regsets_info = |
174 | { | |
175 | tile_regsets, /* regsets */ | |
176 | 0, /* num_regsets */ | |
177 | NULL, /* disabled_regsets */ | |
178 | }; | |
179 | ||
180 | static struct usrregs_info tile_usrregs_info = | |
181 | { | |
182 | tile_num_regs, | |
183 | tile_regmap, | |
184 | }; | |
185 | ||
aa8d21c9 | 186 | static struct regs_info myregs_info = |
3aee8918 PA |
187 | { |
188 | NULL, /* regset_bitmap */ | |
189 | &tile_usrregs_info, | |
190 | &tile_regsets_info, | |
191 | }; | |
192 | ||
aa8d21c9 TBA |
193 | const regs_info * |
194 | tile_target::get_regs_info () | |
3aee8918 | 195 | { |
aa8d21c9 | 196 | return &myregs_info; |
3aee8918 PA |
197 | } |
198 | ||
797bcff5 TBA |
199 | void |
200 | tile_target::low_arch_setup () | |
e1f58301 | 201 | { |
0bfdf32f | 202 | int pid = pid_of (current_thread); |
e1f58301 JW |
203 | unsigned int machine; |
204 | int is_elf64 = linux_pid_exe_is_elf_64_file (pid, &machine); | |
205 | ||
206 | if (sizeof (void *) == 4) | |
207 | if (is_elf64 > 0) | |
208 | error (_("Can't debug 64-bit process with 32-bit GDBserver")); | |
209 | ||
210 | if (!is_elf64) | |
3aee8918 | 211 | current_process ()->tdesc = tdesc_tilegx32; |
e1f58301 | 212 | else |
3aee8918 | 213 | current_process ()->tdesc = tdesc_tilegx; |
e1f58301 JW |
214 | } |
215 | ||
ef0478f6 TBA |
216 | /* The linux target ops object. */ |
217 | ||
218 | linux_process_target *the_linux_target = &the_tile_target; | |
219 | ||
3aee8918 PA |
220 | void |
221 | initialize_low_arch (void) | |
222 | { | |
223 | init_registers_tilegx32(); | |
224 | init_registers_tilegx(); | |
225 | ||
226 | initialize_regsets_info (&tile_regsets_info); | |
227 | } |