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94a0e877 MG |
1 | /* Xtensa GNU/Linux native support. |
2 | ||
8acc9f48 | 3 | Copyright (C) 2007-2013 Free Software Foundation, Inc. |
94a0e877 MG |
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 "defs.h" | |
21 | #include "gdb_string.h" | |
22 | #include "frame.h" | |
23 | #include "inferior.h" | |
24 | #include "gdbcore.h" | |
25 | #include "regcache.h" | |
26 | #include "gdb_assert.h" | |
27 | #include "target.h" | |
28 | #include "linux-nat.h" | |
29 | ||
30 | #include <stdint.h> | |
31 | #include <sys/types.h> | |
94a0e877 MG |
32 | #include <signal.h> |
33 | #include <sys/user.h> | |
34 | #include <sys/ioctl.h> | |
35 | #include "gdb_wait.h" | |
36 | #include <fcntl.h> | |
37 | #include <sys/procfs.h> | |
38 | #include <sys/ptrace.h> | |
39 | ||
40 | #include "gregset.h" | |
41 | #include "xtensa-tdep.h" | |
42 | ||
43 | /* Extended register set depends on hardware configs. | |
44 | Keeping these definitions separately allows to introduce | |
45 | hardware-specific overlays. */ | |
46 | #include "xtensa-xtregs.c" | |
47 | ||
4e841acf | 48 | static int |
94a0e877 MG |
49 | get_thread_id (ptid_t ptid) |
50 | { | |
dfd4cc63 | 51 | int tid = ptid_get_lwp (ptid); |
94a0e877 | 52 | if (0 == tid) |
dfd4cc63 | 53 | tid = ptid_get_pid (ptid); |
94a0e877 MG |
54 | return tid; |
55 | } | |
56 | #define GET_THREAD_ID(PTID) get_thread_id (PTID) | |
57 | ||
58 | void | |
59 | fill_gregset (const struct regcache *regcache, | |
60 | gdb_gregset_t *gregsetp, int regnum) | |
61 | { | |
62 | int i; | |
63 | xtensa_elf_gregset_t *regs = (xtensa_elf_gregset_t *) gregsetp; | |
64 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
65 | ||
66 | if (regnum == gdbarch_pc_regnum (gdbarch) || regnum == -1) | |
67 | regcache_raw_collect (regcache, gdbarch_pc_regnum (gdbarch), ®s->pc); | |
68 | if (regnum == gdbarch_ps_regnum (gdbarch) || regnum == -1) | |
69 | regcache_raw_collect (regcache, gdbarch_ps_regnum (gdbarch), ®s->ps); | |
70 | ||
71 | if (regnum == gdbarch_tdep (gdbarch)->wb_regnum || regnum == -1) | |
72 | regcache_raw_collect (regcache, | |
73 | gdbarch_tdep (gdbarch)->wb_regnum, | |
74 | ®s->windowbase); | |
75 | if (regnum == gdbarch_tdep (gdbarch)->ws_regnum || regnum == -1) | |
76 | regcache_raw_collect (regcache, | |
77 | gdbarch_tdep (gdbarch)->ws_regnum, | |
78 | ®s->windowstart); | |
79 | if (regnum == gdbarch_tdep (gdbarch)->lbeg_regnum || regnum == -1) | |
80 | regcache_raw_collect (regcache, | |
81 | gdbarch_tdep (gdbarch)->lbeg_regnum, | |
82 | ®s->lbeg); | |
83 | if (regnum == gdbarch_tdep (gdbarch)->lend_regnum || regnum == -1) | |
84 | regcache_raw_collect (regcache, | |
85 | gdbarch_tdep (gdbarch)->lend_regnum, | |
86 | ®s->lend); | |
87 | if (regnum == gdbarch_tdep (gdbarch)->lcount_regnum || regnum == -1) | |
88 | regcache_raw_collect (regcache, | |
89 | gdbarch_tdep (gdbarch)->lcount_regnum, | |
90 | ®s->lcount); | |
91 | if (regnum == gdbarch_tdep (gdbarch)->sar_regnum || regnum == -1) | |
92 | regcache_raw_collect (regcache, | |
93 | gdbarch_tdep (gdbarch)->sar_regnum, | |
94 | ®s->sar); | |
95 | if (regnum >=gdbarch_tdep (gdbarch)->ar_base | |
96 | && regnum < gdbarch_tdep (gdbarch)->ar_base | |
97 | + gdbarch_tdep (gdbarch)->num_aregs) | |
98 | regcache_raw_collect (regcache,regnum, | |
99 | ®s->ar[regnum - gdbarch_tdep (gdbarch)->ar_base]); | |
100 | else if (regnum == -1) | |
101 | { | |
102 | for (i = 0; i < gdbarch_tdep (gdbarch)->num_aregs; ++i) | |
103 | regcache_raw_collect (regcache, | |
104 | gdbarch_tdep (gdbarch)->ar_base + i, | |
105 | ®s->ar[i]); | |
106 | } | |
107 | } | |
108 | ||
109 | void | |
110 | supply_gregset_reg (struct regcache *regcache, | |
111 | const gdb_gregset_t *gregsetp, int regnum) | |
112 | { | |
113 | int i; | |
114 | xtensa_elf_gregset_t *regs = (xtensa_elf_gregset_t *) gregsetp; | |
115 | ||
116 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
117 | ||
118 | if (regnum == gdbarch_pc_regnum (gdbarch) || regnum == -1) | |
119 | regcache_raw_supply (regcache, gdbarch_pc_regnum (gdbarch), ®s->pc); | |
120 | if (regnum == gdbarch_ps_regnum (gdbarch) || regnum == -1) | |
121 | regcache_raw_supply (regcache, gdbarch_ps_regnum (gdbarch), ®s->ps); | |
122 | ||
123 | if (regnum == gdbarch_tdep (gdbarch)->wb_regnum || regnum == -1) | |
124 | regcache_raw_supply (regcache, | |
125 | gdbarch_tdep (gdbarch)->wb_regnum, | |
126 | ®s->windowbase); | |
127 | if (regnum == gdbarch_tdep (gdbarch)->ws_regnum || regnum == -1) | |
128 | regcache_raw_supply (regcache, | |
129 | gdbarch_tdep (gdbarch)->ws_regnum, | |
130 | ®s->windowstart); | |
131 | if (regnum == gdbarch_tdep (gdbarch)->lbeg_regnum || regnum == -1) | |
132 | regcache_raw_supply (regcache, | |
133 | gdbarch_tdep (gdbarch)->lbeg_regnum, | |
134 | ®s->lbeg); | |
135 | if (regnum == gdbarch_tdep (gdbarch)->lend_regnum || regnum == -1) | |
136 | regcache_raw_supply (regcache, | |
137 | gdbarch_tdep (gdbarch)->lend_regnum, | |
138 | ®s->lend); | |
139 | if (regnum == gdbarch_tdep (gdbarch)->lcount_regnum || regnum == -1) | |
140 | regcache_raw_supply (regcache, | |
141 | gdbarch_tdep (gdbarch)->lcount_regnum, | |
142 | ®s->lcount); | |
143 | if (regnum == gdbarch_tdep (gdbarch)->sar_regnum || regnum == -1) | |
144 | regcache_raw_supply (regcache, | |
145 | gdbarch_tdep (gdbarch)->sar_regnum, | |
146 | ®s->sar); | |
147 | if (regnum >=gdbarch_tdep (gdbarch)->ar_base | |
148 | && regnum < gdbarch_tdep (gdbarch)->ar_base | |
149 | + gdbarch_tdep (gdbarch)->num_aregs) | |
150 | regcache_raw_supply (regcache,regnum, | |
151 | ®s->ar[regnum - gdbarch_tdep (gdbarch)->ar_base]); | |
152 | else if (regnum == -1) | |
153 | { | |
154 | for (i = 0; i < gdbarch_tdep (gdbarch)->num_aregs; ++i) | |
155 | regcache_raw_supply (regcache, | |
156 | gdbarch_tdep (gdbarch)->ar_base + i, | |
157 | ®s->ar[i]); | |
158 | } | |
159 | } | |
160 | ||
161 | void | |
162 | supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregsetp) | |
163 | { | |
164 | supply_gregset_reg (regcache, gregsetp, -1); | |
165 | } | |
166 | ||
167 | void | |
168 | fill_fpregset (const struct regcache *regcache, | |
169 | gdb_fpregset_t *fpregsetp, int regnum) | |
170 | { | |
171 | return; | |
172 | } | |
173 | ||
174 | void | |
175 | supply_fpregset (struct regcache *regcache, | |
176 | const gdb_fpregset_t *fpregsetp) | |
177 | { | |
178 | return; | |
179 | } | |
180 | ||
181 | /* Fetch greg-register(s) from process/thread TID | |
182 | and store value(s) in GDB's register array. */ | |
183 | ||
184 | static void | |
185 | fetch_gregs (struct regcache *regcache, int regnum) | |
186 | { | |
187 | int tid = GET_THREAD_ID (inferior_ptid); | |
188 | const gdb_gregset_t regs; | |
189 | int areg; | |
190 | ||
191 | if (ptrace (PTRACE_GETREGS, tid, 0, (long) ®s) < 0) | |
192 | { | |
193 | perror_with_name (_("Couldn't get registers")); | |
194 | return; | |
195 | } | |
196 | ||
197 | supply_gregset_reg (regcache, ®s, regnum); | |
198 | } | |
199 | ||
200 | /* Store greg-register(s) in GDB's register | |
201 | array into the process/thread specified by TID. */ | |
202 | ||
203 | static void | |
204 | store_gregs (struct regcache *regcache, int regnum) | |
205 | { | |
206 | int tid = GET_THREAD_ID (inferior_ptid); | |
207 | gdb_gregset_t regs; | |
208 | int areg; | |
209 | ||
210 | if (ptrace (PTRACE_GETREGS, tid, 0, (long) ®s) < 0) | |
211 | { | |
212 | perror_with_name (_("Couldn't get registers")); | |
213 | return; | |
214 | } | |
215 | ||
216 | fill_gregset (regcache, ®s, regnum); | |
217 | ||
218 | if (ptrace (PTRACE_SETREGS, tid, 0, (long) ®s) < 0) | |
219 | { | |
220 | perror_with_name (_("Couldn't write registers")); | |
221 | return; | |
222 | } | |
223 | } | |
224 | ||
225 | static int xtreg_lo; | |
226 | static int xtreg_high; | |
227 | ||
228 | /* Fetch/Store Xtensa TIE registers. Xtensa GNU/Linux PTRACE | |
229 | interface provides special requests for this. */ | |
230 | ||
231 | static void | |
232 | fetch_xtregs (struct regcache *regcache, int regnum) | |
233 | { | |
234 | int tid = GET_THREAD_ID (inferior_ptid); | |
235 | const xtensa_regtable_t *ptr; | |
236 | char xtregs [XTENSA_ELF_XTREG_SIZE]; | |
237 | ||
238 | if (ptrace (PTRACE_GETXTREGS, tid, 0, (long)&xtregs) < 0) | |
239 | perror_with_name (_("Couldn't get extended registers")); | |
240 | ||
241 | for (ptr = xtensa_regmap_table; ptr->name; ptr++) | |
242 | if (regnum == ptr->gdb_regnum || regnum == -1) | |
243 | regcache_raw_supply (regcache, ptr->gdb_regnum, | |
244 | xtregs + ptr->ptrace_offset); | |
245 | } | |
246 | ||
247 | static void | |
248 | store_xtregs (struct regcache *regcache, int regnum) | |
249 | { | |
250 | int tid = GET_THREAD_ID (inferior_ptid); | |
251 | const xtensa_regtable_t *ptr; | |
252 | char xtregs [XTENSA_ELF_XTREG_SIZE]; | |
253 | ||
254 | if (ptrace (PTRACE_GETXTREGS, tid, 0, (long)&xtregs) < 0) | |
255 | perror_with_name (_("Couldn't get extended registers")); | |
256 | ||
257 | for (ptr = xtensa_regmap_table; ptr->name; ptr++) | |
258 | if (regnum == ptr->gdb_regnum || regnum == -1) | |
259 | regcache_raw_collect (regcache, ptr->gdb_regnum, | |
260 | xtregs + ptr->ptrace_offset); | |
261 | ||
262 | if (ptrace (PTRACE_SETXTREGS, tid, 0, (long)&xtregs) < 0) | |
263 | perror_with_name (_("Couldn't write extended registers")); | |
264 | } | |
265 | ||
266 | void | |
28439f5e PA |
267 | xtensa_linux_fetch_inferior_registers (struct target_ops *ops, |
268 | struct regcache *regcache, int regnum) | |
94a0e877 MG |
269 | { |
270 | if (regnum == -1) | |
271 | { | |
272 | fetch_gregs (regcache, regnum); | |
273 | fetch_xtregs (regcache, regnum); | |
274 | } | |
275 | else if ((regnum < xtreg_lo) || (regnum > xtreg_high)) | |
276 | fetch_gregs (regcache, regnum); | |
277 | else | |
278 | fetch_xtregs (regcache, regnum); | |
279 | } | |
280 | ||
281 | void | |
28439f5e PA |
282 | xtensa_linux_store_inferior_registers (struct target_ops *ops, |
283 | struct regcache *regcache, int regnum) | |
94a0e877 MG |
284 | { |
285 | if (regnum == -1) | |
286 | { | |
287 | store_gregs (regcache, regnum); | |
288 | store_xtregs (regcache, regnum); | |
289 | } | |
290 | else if ((regnum < xtreg_lo) || (regnum > xtreg_high)) | |
291 | store_gregs (regcache, regnum); | |
292 | else | |
293 | store_xtregs (regcache, regnum); | |
294 | } | |
295 | ||
296 | void _initialize_xtensa_linux_nat (void); | |
297 | ||
298 | void | |
299 | _initialize_xtensa_linux_nat (void) | |
300 | { | |
301 | struct target_ops *t; | |
302 | const xtensa_regtable_t *ptr; | |
303 | ||
304 | /* Calculate the number range for extended registers. */ | |
305 | xtreg_lo = 1000000000; | |
306 | xtreg_high = -1; | |
307 | for (ptr = xtensa_regmap_table; ptr->name; ptr++) | |
308 | { | |
309 | if (ptr->gdb_regnum < xtreg_lo) | |
310 | xtreg_lo = ptr->gdb_regnum; | |
311 | if (ptr->gdb_regnum > xtreg_high) | |
312 | xtreg_high = ptr->gdb_regnum; | |
313 | } | |
314 | ||
315 | /* Fill in the generic GNU/Linux methods. */ | |
316 | t = linux_target (); | |
317 | ||
318 | /* Add our register access methods. */ | |
319 | t->to_fetch_registers = xtensa_linux_fetch_inferior_registers; | |
320 | t->to_store_registers = xtensa_linux_store_inferior_registers; | |
321 | ||
322 | linux_nat_add_target (t); | |
323 | } |