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94a0e877 MG |
1 | /* Xtensa GNU/Linux native support. |
2 | ||
61baf725 | 3 | Copyright (C) 2007-2017 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" | |
94a0e877 MG |
21 | #include "frame.h" |
22 | #include "inferior.h" | |
23 | #include "gdbcore.h" | |
24 | #include "regcache.h" | |
94a0e877 MG |
25 | #include "target.h" |
26 | #include "linux-nat.h" | |
94a0e877 | 27 | #include <sys/types.h> |
94a0e877 MG |
28 | #include <signal.h> |
29 | #include <sys/user.h> | |
30 | #include <sys/ioctl.h> | |
31 | #include "gdb_wait.h" | |
32 | #include <fcntl.h> | |
33 | #include <sys/procfs.h> | |
5826e159 | 34 | #include "nat/gdb_ptrace.h" |
e671835b | 35 | #include <asm/ptrace.h> |
94a0e877 MG |
36 | |
37 | #include "gregset.h" | |
38 | #include "xtensa-tdep.h" | |
39 | ||
40045d91 MF |
40 | /* Defines ps_err_e, struct ps_prochandle. */ |
41 | #include "gdb_proc_service.h" | |
42 | ||
94a0e877 MG |
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 | ||
94a0e877 MG |
48 | void |
49 | fill_gregset (const struct regcache *regcache, | |
50 | gdb_gregset_t *gregsetp, int regnum) | |
51 | { | |
52 | int i; | |
53 | xtensa_elf_gregset_t *regs = (xtensa_elf_gregset_t *) gregsetp; | |
54 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
55 | ||
56 | if (regnum == gdbarch_pc_regnum (gdbarch) || regnum == -1) | |
57 | regcache_raw_collect (regcache, gdbarch_pc_regnum (gdbarch), ®s->pc); | |
58 | if (regnum == gdbarch_ps_regnum (gdbarch) || regnum == -1) | |
59 | regcache_raw_collect (regcache, gdbarch_ps_regnum (gdbarch), ®s->ps); | |
60 | ||
61 | if (regnum == gdbarch_tdep (gdbarch)->wb_regnum || regnum == -1) | |
62 | regcache_raw_collect (regcache, | |
63 | gdbarch_tdep (gdbarch)->wb_regnum, | |
64 | ®s->windowbase); | |
65 | if (regnum == gdbarch_tdep (gdbarch)->ws_regnum || regnum == -1) | |
66 | regcache_raw_collect (regcache, | |
67 | gdbarch_tdep (gdbarch)->ws_regnum, | |
68 | ®s->windowstart); | |
69 | if (regnum == gdbarch_tdep (gdbarch)->lbeg_regnum || regnum == -1) | |
70 | regcache_raw_collect (regcache, | |
71 | gdbarch_tdep (gdbarch)->lbeg_regnum, | |
72 | ®s->lbeg); | |
73 | if (regnum == gdbarch_tdep (gdbarch)->lend_regnum || regnum == -1) | |
74 | regcache_raw_collect (regcache, | |
75 | gdbarch_tdep (gdbarch)->lend_regnum, | |
76 | ®s->lend); | |
77 | if (regnum == gdbarch_tdep (gdbarch)->lcount_regnum || regnum == -1) | |
78 | regcache_raw_collect (regcache, | |
79 | gdbarch_tdep (gdbarch)->lcount_regnum, | |
80 | ®s->lcount); | |
81 | if (regnum == gdbarch_tdep (gdbarch)->sar_regnum || regnum == -1) | |
82 | regcache_raw_collect (regcache, | |
83 | gdbarch_tdep (gdbarch)->sar_regnum, | |
84 | ®s->sar); | |
f74f865e MF |
85 | if (regnum == gdbarch_tdep (gdbarch)->threadptr_regnum || regnum == -1) |
86 | regcache_raw_collect (regcache, | |
87 | gdbarch_tdep (gdbarch)->threadptr_regnum, | |
88 | ®s->threadptr); | |
94a0e877 MG |
89 | if (regnum >=gdbarch_tdep (gdbarch)->ar_base |
90 | && regnum < gdbarch_tdep (gdbarch)->ar_base | |
91 | + gdbarch_tdep (gdbarch)->num_aregs) | |
92 | regcache_raw_collect (regcache,regnum, | |
93 | ®s->ar[regnum - gdbarch_tdep (gdbarch)->ar_base]); | |
94 | else if (regnum == -1) | |
95 | { | |
96 | for (i = 0; i < gdbarch_tdep (gdbarch)->num_aregs; ++i) | |
97 | regcache_raw_collect (regcache, | |
98 | gdbarch_tdep (gdbarch)->ar_base + i, | |
99 | ®s->ar[i]); | |
100 | } | |
0ce4291e MF |
101 | if (regnum >= gdbarch_tdep (gdbarch)->a0_base |
102 | && regnum < gdbarch_tdep (gdbarch)->a0_base + C0_NREGS) | |
103 | regcache_raw_collect (regcache, regnum, | |
104 | ®s->ar[(4 * regs->windowbase + regnum | |
105 | - gdbarch_tdep (gdbarch)->a0_base) | |
106 | % gdbarch_tdep (gdbarch)->num_aregs]); | |
107 | else if (regnum == -1) | |
108 | { | |
109 | for (i = 0; i < C0_NREGS; ++i) | |
110 | regcache_raw_collect (regcache, | |
111 | gdbarch_tdep (gdbarch)->a0_base + i, | |
112 | ®s->ar[(4 * regs->windowbase + i) | |
113 | % gdbarch_tdep (gdbarch)->num_aregs]); | |
114 | } | |
94a0e877 MG |
115 | } |
116 | ||
1c215b97 | 117 | static void |
94a0e877 MG |
118 | supply_gregset_reg (struct regcache *regcache, |
119 | const gdb_gregset_t *gregsetp, int regnum) | |
120 | { | |
121 | int i; | |
122 | xtensa_elf_gregset_t *regs = (xtensa_elf_gregset_t *) gregsetp; | |
123 | ||
124 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
125 | ||
126 | if (regnum == gdbarch_pc_regnum (gdbarch) || regnum == -1) | |
127 | regcache_raw_supply (regcache, gdbarch_pc_regnum (gdbarch), ®s->pc); | |
128 | if (regnum == gdbarch_ps_regnum (gdbarch) || regnum == -1) | |
129 | regcache_raw_supply (regcache, gdbarch_ps_regnum (gdbarch), ®s->ps); | |
130 | ||
131 | if (regnum == gdbarch_tdep (gdbarch)->wb_regnum || regnum == -1) | |
132 | regcache_raw_supply (regcache, | |
133 | gdbarch_tdep (gdbarch)->wb_regnum, | |
134 | ®s->windowbase); | |
135 | if (regnum == gdbarch_tdep (gdbarch)->ws_regnum || regnum == -1) | |
136 | regcache_raw_supply (regcache, | |
137 | gdbarch_tdep (gdbarch)->ws_regnum, | |
138 | ®s->windowstart); | |
139 | if (regnum == gdbarch_tdep (gdbarch)->lbeg_regnum || regnum == -1) | |
140 | regcache_raw_supply (regcache, | |
141 | gdbarch_tdep (gdbarch)->lbeg_regnum, | |
142 | ®s->lbeg); | |
143 | if (regnum == gdbarch_tdep (gdbarch)->lend_regnum || regnum == -1) | |
144 | regcache_raw_supply (regcache, | |
145 | gdbarch_tdep (gdbarch)->lend_regnum, | |
146 | ®s->lend); | |
147 | if (regnum == gdbarch_tdep (gdbarch)->lcount_regnum || regnum == -1) | |
148 | regcache_raw_supply (regcache, | |
149 | gdbarch_tdep (gdbarch)->lcount_regnum, | |
150 | ®s->lcount); | |
151 | if (regnum == gdbarch_tdep (gdbarch)->sar_regnum || regnum == -1) | |
152 | regcache_raw_supply (regcache, | |
153 | gdbarch_tdep (gdbarch)->sar_regnum, | |
154 | ®s->sar); | |
f74f865e MF |
155 | if (regnum == gdbarch_tdep (gdbarch)->threadptr_regnum || regnum == -1) |
156 | regcache_raw_supply (regcache, | |
157 | gdbarch_tdep (gdbarch)->threadptr_regnum, | |
158 | ®s->threadptr); | |
94a0e877 MG |
159 | if (regnum >=gdbarch_tdep (gdbarch)->ar_base |
160 | && regnum < gdbarch_tdep (gdbarch)->ar_base | |
161 | + gdbarch_tdep (gdbarch)->num_aregs) | |
162 | regcache_raw_supply (regcache,regnum, | |
163 | ®s->ar[regnum - gdbarch_tdep (gdbarch)->ar_base]); | |
164 | else if (regnum == -1) | |
165 | { | |
166 | for (i = 0; i < gdbarch_tdep (gdbarch)->num_aregs; ++i) | |
167 | regcache_raw_supply (regcache, | |
168 | gdbarch_tdep (gdbarch)->ar_base + i, | |
169 | ®s->ar[i]); | |
170 | } | |
0ce4291e MF |
171 | if (regnum >= gdbarch_tdep (gdbarch)->a0_base |
172 | && regnum < gdbarch_tdep (gdbarch)->a0_base + C0_NREGS) | |
173 | regcache_raw_supply (regcache, regnum, | |
174 | ®s->ar[(4 * regs->windowbase + regnum | |
175 | - gdbarch_tdep (gdbarch)->a0_base) | |
176 | % gdbarch_tdep (gdbarch)->num_aregs]); | |
177 | else if (regnum == -1) | |
178 | { | |
179 | for (i = 0; i < C0_NREGS; ++i) | |
180 | regcache_raw_supply (regcache, | |
181 | gdbarch_tdep (gdbarch)->a0_base + i, | |
182 | ®s->ar[(4 * regs->windowbase + i) | |
183 | % gdbarch_tdep (gdbarch)->num_aregs]); | |
184 | } | |
94a0e877 MG |
185 | } |
186 | ||
187 | void | |
188 | supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregsetp) | |
189 | { | |
190 | supply_gregset_reg (regcache, gregsetp, -1); | |
191 | } | |
192 | ||
193 | void | |
194 | fill_fpregset (const struct regcache *regcache, | |
195 | gdb_fpregset_t *fpregsetp, int regnum) | |
196 | { | |
197 | return; | |
198 | } | |
199 | ||
200 | void | |
201 | supply_fpregset (struct regcache *regcache, | |
202 | const gdb_fpregset_t *fpregsetp) | |
203 | { | |
204 | return; | |
205 | } | |
206 | ||
207 | /* Fetch greg-register(s) from process/thread TID | |
208 | and store value(s) in GDB's register array. */ | |
209 | ||
210 | static void | |
211 | fetch_gregs (struct regcache *regcache, int regnum) | |
212 | { | |
bcc0c096 | 213 | int tid = ptid_get_lwp (regcache_get_ptid (regcache)); |
d274ecf4 | 214 | gdb_gregset_t regs; |
94a0e877 MG |
215 | int areg; |
216 | ||
217 | if (ptrace (PTRACE_GETREGS, tid, 0, (long) ®s) < 0) | |
218 | { | |
219 | perror_with_name (_("Couldn't get registers")); | |
220 | return; | |
221 | } | |
222 | ||
223 | supply_gregset_reg (regcache, ®s, regnum); | |
224 | } | |
225 | ||
226 | /* Store greg-register(s) in GDB's register | |
227 | array into the process/thread specified by TID. */ | |
228 | ||
229 | static void | |
230 | store_gregs (struct regcache *regcache, int regnum) | |
231 | { | |
bcc0c096 | 232 | int tid = ptid_get_lwp (regcache_get_ptid (regcache)); |
94a0e877 MG |
233 | gdb_gregset_t regs; |
234 | int areg; | |
235 | ||
236 | if (ptrace (PTRACE_GETREGS, tid, 0, (long) ®s) < 0) | |
237 | { | |
238 | perror_with_name (_("Couldn't get registers")); | |
239 | return; | |
240 | } | |
241 | ||
242 | fill_gregset (regcache, ®s, regnum); | |
243 | ||
244 | if (ptrace (PTRACE_SETREGS, tid, 0, (long) ®s) < 0) | |
245 | { | |
246 | perror_with_name (_("Couldn't write registers")); | |
247 | return; | |
248 | } | |
249 | } | |
250 | ||
251 | static int xtreg_lo; | |
252 | static int xtreg_high; | |
253 | ||
254 | /* Fetch/Store Xtensa TIE registers. Xtensa GNU/Linux PTRACE | |
255 | interface provides special requests for this. */ | |
256 | ||
257 | static void | |
258 | fetch_xtregs (struct regcache *regcache, int regnum) | |
259 | { | |
bcc0c096 | 260 | int tid = ptid_get_lwp (regcache_get_ptid (regcache)); |
94a0e877 MG |
261 | const xtensa_regtable_t *ptr; |
262 | char xtregs [XTENSA_ELF_XTREG_SIZE]; | |
263 | ||
264 | if (ptrace (PTRACE_GETXTREGS, tid, 0, (long)&xtregs) < 0) | |
265 | perror_with_name (_("Couldn't get extended registers")); | |
266 | ||
267 | for (ptr = xtensa_regmap_table; ptr->name; ptr++) | |
268 | if (regnum == ptr->gdb_regnum || regnum == -1) | |
269 | regcache_raw_supply (regcache, ptr->gdb_regnum, | |
270 | xtregs + ptr->ptrace_offset); | |
271 | } | |
272 | ||
273 | static void | |
274 | store_xtregs (struct regcache *regcache, int regnum) | |
275 | { | |
bcc0c096 | 276 | int tid = ptid_get_lwp (regcache_get_ptid (regcache)); |
94a0e877 MG |
277 | const xtensa_regtable_t *ptr; |
278 | char xtregs [XTENSA_ELF_XTREG_SIZE]; | |
279 | ||
280 | if (ptrace (PTRACE_GETXTREGS, tid, 0, (long)&xtregs) < 0) | |
281 | perror_with_name (_("Couldn't get extended registers")); | |
282 | ||
283 | for (ptr = xtensa_regmap_table; ptr->name; ptr++) | |
284 | if (regnum == ptr->gdb_regnum || regnum == -1) | |
285 | regcache_raw_collect (regcache, ptr->gdb_regnum, | |
286 | xtregs + ptr->ptrace_offset); | |
287 | ||
288 | if (ptrace (PTRACE_SETXTREGS, tid, 0, (long)&xtregs) < 0) | |
289 | perror_with_name (_("Couldn't write extended registers")); | |
290 | } | |
291 | ||
1c215b97 | 292 | static void |
28439f5e PA |
293 | xtensa_linux_fetch_inferior_registers (struct target_ops *ops, |
294 | struct regcache *regcache, int regnum) | |
94a0e877 MG |
295 | { |
296 | if (regnum == -1) | |
297 | { | |
298 | fetch_gregs (regcache, regnum); | |
299 | fetch_xtregs (regcache, regnum); | |
300 | } | |
301 | else if ((regnum < xtreg_lo) || (regnum > xtreg_high)) | |
302 | fetch_gregs (regcache, regnum); | |
303 | else | |
304 | fetch_xtregs (regcache, regnum); | |
305 | } | |
306 | ||
1c215b97 | 307 | static void |
28439f5e PA |
308 | xtensa_linux_store_inferior_registers (struct target_ops *ops, |
309 | struct regcache *regcache, int regnum) | |
94a0e877 MG |
310 | { |
311 | if (regnum == -1) | |
312 | { | |
313 | store_gregs (regcache, regnum); | |
314 | store_xtregs (regcache, regnum); | |
315 | } | |
316 | else if ((regnum < xtreg_lo) || (regnum > xtreg_high)) | |
317 | store_gregs (regcache, regnum); | |
318 | else | |
319 | store_xtregs (regcache, regnum); | |
320 | } | |
321 | ||
40045d91 MF |
322 | /* Called by libthread_db. */ |
323 | ||
324 | ps_err_e | |
754653a7 | 325 | ps_get_thread_area (struct ps_prochandle *ph, |
40045d91 MF |
326 | lwpid_t lwpid, int idx, void **base) |
327 | { | |
328 | xtensa_elf_gregset_t regs; | |
329 | ||
330 | if (ptrace (PTRACE_GETREGS, lwpid, NULL, ®s) != 0) | |
331 | return PS_ERR; | |
332 | ||
333 | /* IDX is the bias from the thread pointer to the beginning of the | |
334 | thread descriptor. It has to be subtracted due to implementation | |
335 | quirks in libthread_db. */ | |
336 | *base = (void *) ((char *) regs.threadptr - idx); | |
337 | ||
338 | return PS_OK; | |
339 | } | |
340 | ||
94a0e877 MG |
341 | void |
342 | _initialize_xtensa_linux_nat (void) | |
343 | { | |
344 | struct target_ops *t; | |
345 | const xtensa_regtable_t *ptr; | |
346 | ||
347 | /* Calculate the number range for extended registers. */ | |
348 | xtreg_lo = 1000000000; | |
349 | xtreg_high = -1; | |
350 | for (ptr = xtensa_regmap_table; ptr->name; ptr++) | |
351 | { | |
352 | if (ptr->gdb_regnum < xtreg_lo) | |
353 | xtreg_lo = ptr->gdb_regnum; | |
354 | if (ptr->gdb_regnum > xtreg_high) | |
355 | xtreg_high = ptr->gdb_regnum; | |
356 | } | |
357 | ||
358 | /* Fill in the generic GNU/Linux methods. */ | |
359 | t = linux_target (); | |
360 | ||
361 | /* Add our register access methods. */ | |
362 | t->to_fetch_registers = xtensa_linux_fetch_inferior_registers; | |
363 | t->to_store_registers = xtensa_linux_store_inferior_registers; | |
364 | ||
365 | linux_nat_add_target (t); | |
366 | } |