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ea5bc2a6 | 1 | /* Common target-dependent code for NetBSD systems. |
76a9d10f | 2 | |
b811d2c2 | 3 | Copyright (C) 2002-2020 Free Software Foundation, Inc. |
76a9d10f | 4 | |
ea5bc2a6 JT |
5 | Contributed by Wasabi Systems, Inc. |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
ea5bc2a6 | 12 | (at your option) any later version. |
a9762ec7 | 13 | |
ea5bc2a6 JT |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
a9762ec7 | 18 | |
ea5bc2a6 | 19 | You should have received a copy of the GNU General Public License |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
ea5bc2a6 JT |
21 | |
22 | #include "defs.h" | |
206c98a6 | 23 | #include "auxv.h" |
ea5bc2a6 | 24 | #include "solib-svr4.h" |
63807e1d | 25 | #include "nbsd-tdep.h" |
79743962 | 26 | #include "gdbarch.h" |
063f8e80 | 27 | #include "objfiles.h" |
ea5bc2a6 | 28 | |
54b8cbd0 KR |
29 | /* Flags in the 'kve_protection' field in struct kinfo_vmentry. These |
30 | match the KVME_PROT_* constants in <sys/sysctl.h>. */ | |
31 | ||
32 | #define KINFO_VME_PROT_READ 0x00000001 | |
33 | #define KINFO_VME_PROT_WRITE 0x00000002 | |
34 | #define KINFO_VME_PROT_EXEC 0x00000004 | |
35 | ||
36 | /* Flags in the 'kve_flags' field in struct kinfo_vmentry. These | |
37 | match the KVME_FLAG_* constants in <sys/sysctl.h>. */ | |
38 | ||
39 | #define KINFO_VME_FLAG_COW 0x00000001 | |
40 | #define KINFO_VME_FLAG_NEEDS_COPY 0x00000002 | |
41 | #define KINFO_VME_FLAG_NOCOREDUMP 0x00000004 | |
42 | #define KINFO_VME_FLAG_PAGEABLE 0x00000008 | |
43 | #define KINFO_VME_FLAG_GROWS_UP 0x00000010 | |
44 | #define KINFO_VME_FLAG_GROWS_DOWN 0x00000020 | |
45 | ||
76a9d10f MK |
46 | /* FIXME: kettenis/20060115: We should really eliminate the next two |
47 | functions completely. */ | |
ea5bc2a6 | 48 | |
ea5bc2a6 JT |
49 | struct link_map_offsets * |
50 | nbsd_ilp32_solib_svr4_fetch_link_map_offsets (void) | |
51 | { | |
76a9d10f | 52 | return svr4_ilp32_fetch_link_map_offsets (); |
ea5bc2a6 JT |
53 | } |
54 | ||
55 | struct link_map_offsets * | |
56 | nbsd_lp64_solib_svr4_fetch_link_map_offsets (void) | |
57 | { | |
76a9d10f | 58 | return svr4_lp64_fetch_link_map_offsets (); |
ea5bc2a6 | 59 | } |
3d9b49b0 JT |
60 | |
61 | int | |
2c02bd72 | 62 | nbsd_pc_in_sigtramp (CORE_ADDR pc, const char *func_name) |
3d9b49b0 JT |
63 | { |
64 | /* Check for libc-provided signal trampoline. All such trampolines | |
65 | have function names which begin with "__sigtramp". */ | |
66 | ||
67 | return (func_name != NULL | |
61012eef | 68 | && startswith (func_name, "__sigtramp")); |
3d9b49b0 | 69 | } |
79743962 KR |
70 | |
71 | /* This enum is derived from NETBSD's <sys/signal.h>. */ | |
72 | ||
73 | enum | |
74 | { | |
75 | NBSD_SIGHUP = 1, | |
76 | NBSD_SIGINT = 2, | |
77 | NBSD_SIGQUIT = 3, | |
78 | NBSD_SIGILL = 4, | |
79 | NBSD_SIGTRAP = 5, | |
80 | NBSD_SIGABRT = 6, | |
81 | NBSD_SIGEMT = 7, | |
82 | NBSD_SIGFPE = 8, | |
83 | NBSD_SIGKILL = 9, | |
84 | NBSD_SIGBUS = 10, | |
85 | NBSD_SIGSEGV = 11, | |
86 | NBSD_SIGSYS = 12, | |
87 | NBSD_SIGPIPE = 13, | |
88 | NBSD_SIGALRM = 14, | |
89 | NBSD_SIGTERM = 15, | |
90 | NBSD_SIGURG = 16, | |
91 | NBSD_SIGSTOP = 17, | |
92 | NBSD_SIGTSTP = 18, | |
93 | NBSD_SIGCONT = 19, | |
94 | NBSD_SIGCHLD = 20, | |
95 | NBSD_SIGTTIN = 21, | |
96 | NBSD_SIGTTOU = 22, | |
97 | NBSD_SIGIO = 23, | |
98 | NBSD_SIGXCPU = 24, | |
99 | NBSD_SIGXFSZ = 25, | |
100 | NBSD_SIGVTALRM = 26, | |
101 | NBSD_SIGPROF = 27, | |
102 | NBSD_SIGWINCH = 28, | |
103 | NBSD_SIGINFO = 29, | |
104 | NBSD_SIGUSR1 = 30, | |
105 | NBSD_SIGUSR2 = 31, | |
106 | NBSD_SIGPWR = 32, | |
107 | NBSD_SIGRTMIN = 33, | |
108 | NBSD_SIGRTMAX = 63, | |
109 | }; | |
110 | ||
111 | /* Implement the "gdb_signal_from_target" gdbarch method. */ | |
112 | ||
113 | static enum gdb_signal | |
114 | nbsd_gdb_signal_from_target (struct gdbarch *gdbarch, int signal) | |
115 | { | |
116 | switch (signal) | |
117 | { | |
118 | case 0: | |
119 | return GDB_SIGNAL_0; | |
120 | ||
121 | case NBSD_SIGHUP: | |
122 | return GDB_SIGNAL_HUP; | |
123 | ||
124 | case NBSD_SIGINT: | |
125 | return GDB_SIGNAL_INT; | |
126 | ||
127 | case NBSD_SIGQUIT: | |
128 | return GDB_SIGNAL_QUIT; | |
129 | ||
130 | case NBSD_SIGILL: | |
131 | return GDB_SIGNAL_ILL; | |
132 | ||
133 | case NBSD_SIGTRAP: | |
134 | return GDB_SIGNAL_TRAP; | |
135 | ||
136 | case NBSD_SIGABRT: | |
137 | return GDB_SIGNAL_ABRT; | |
138 | ||
139 | case NBSD_SIGEMT: | |
140 | return GDB_SIGNAL_EMT; | |
141 | ||
142 | case NBSD_SIGFPE: | |
143 | return GDB_SIGNAL_FPE; | |
144 | ||
145 | case NBSD_SIGKILL: | |
146 | return GDB_SIGNAL_KILL; | |
147 | ||
148 | case NBSD_SIGBUS: | |
149 | return GDB_SIGNAL_BUS; | |
150 | ||
151 | case NBSD_SIGSEGV: | |
152 | return GDB_SIGNAL_SEGV; | |
153 | ||
154 | case NBSD_SIGSYS: | |
155 | return GDB_SIGNAL_SYS; | |
156 | ||
157 | case NBSD_SIGPIPE: | |
158 | return GDB_SIGNAL_PIPE; | |
159 | ||
160 | case NBSD_SIGALRM: | |
161 | return GDB_SIGNAL_ALRM; | |
162 | ||
163 | case NBSD_SIGTERM: | |
164 | return GDB_SIGNAL_TERM; | |
165 | ||
166 | case NBSD_SIGURG: | |
167 | return GDB_SIGNAL_URG; | |
168 | ||
169 | case NBSD_SIGSTOP: | |
170 | return GDB_SIGNAL_STOP; | |
171 | ||
172 | case NBSD_SIGTSTP: | |
173 | return GDB_SIGNAL_TSTP; | |
174 | ||
175 | case NBSD_SIGCONT: | |
176 | return GDB_SIGNAL_CONT; | |
177 | ||
178 | case NBSD_SIGCHLD: | |
179 | return GDB_SIGNAL_CHLD; | |
180 | ||
181 | case NBSD_SIGTTIN: | |
182 | return GDB_SIGNAL_TTIN; | |
183 | ||
184 | case NBSD_SIGTTOU: | |
185 | return GDB_SIGNAL_TTOU; | |
186 | ||
187 | case NBSD_SIGIO: | |
188 | return GDB_SIGNAL_IO; | |
189 | ||
190 | case NBSD_SIGXCPU: | |
191 | return GDB_SIGNAL_XCPU; | |
192 | ||
193 | case NBSD_SIGXFSZ: | |
194 | return GDB_SIGNAL_XFSZ; | |
195 | ||
196 | case NBSD_SIGVTALRM: | |
197 | return GDB_SIGNAL_VTALRM; | |
198 | ||
199 | case NBSD_SIGPROF: | |
200 | return GDB_SIGNAL_PROF; | |
201 | ||
202 | case NBSD_SIGWINCH: | |
203 | return GDB_SIGNAL_WINCH; | |
204 | ||
205 | case NBSD_SIGINFO: | |
206 | return GDB_SIGNAL_INFO; | |
207 | ||
208 | case NBSD_SIGUSR1: | |
209 | return GDB_SIGNAL_USR1; | |
210 | ||
211 | case NBSD_SIGUSR2: | |
212 | return GDB_SIGNAL_USR2; | |
213 | ||
214 | case NBSD_SIGPWR: | |
215 | return GDB_SIGNAL_PWR; | |
216 | ||
217 | /* SIGRTMIN and SIGRTMAX are not continuous in <gdb/signals.def>, | |
218 | therefore we have to handle them here. */ | |
219 | case NBSD_SIGRTMIN: | |
220 | return GDB_SIGNAL_REALTIME_33; | |
221 | ||
222 | case NBSD_SIGRTMAX: | |
223 | return GDB_SIGNAL_REALTIME_63; | |
224 | } | |
225 | ||
226 | if (signal >= NBSD_SIGRTMIN + 1 && signal <= NBSD_SIGRTMAX - 1) | |
227 | { | |
228 | int offset = signal - NBSD_SIGRTMIN + 1; | |
229 | ||
230 | return (enum gdb_signal) ((int) GDB_SIGNAL_REALTIME_34 + offset); | |
231 | } | |
232 | ||
233 | return GDB_SIGNAL_UNKNOWN; | |
234 | } | |
235 | ||
236 | /* Implement the "gdb_signal_to_target" gdbarch method. */ | |
237 | ||
238 | static int | |
239 | nbsd_gdb_signal_to_target (struct gdbarch *gdbarch, | |
240 | enum gdb_signal signal) | |
241 | { | |
242 | switch (signal) | |
243 | { | |
244 | case GDB_SIGNAL_0: | |
245 | return 0; | |
246 | ||
247 | case GDB_SIGNAL_HUP: | |
248 | return NBSD_SIGHUP; | |
249 | ||
250 | case GDB_SIGNAL_INT: | |
251 | return NBSD_SIGINT; | |
252 | ||
253 | case GDB_SIGNAL_QUIT: | |
254 | return NBSD_SIGQUIT; | |
255 | ||
256 | case GDB_SIGNAL_ILL: | |
257 | return NBSD_SIGILL; | |
258 | ||
259 | case GDB_SIGNAL_TRAP: | |
260 | return NBSD_SIGTRAP; | |
261 | ||
262 | case GDB_SIGNAL_ABRT: | |
263 | return NBSD_SIGABRT; | |
264 | ||
265 | case GDB_SIGNAL_EMT: | |
266 | return NBSD_SIGEMT; | |
267 | ||
268 | case GDB_SIGNAL_FPE: | |
269 | return NBSD_SIGFPE; | |
270 | ||
271 | case GDB_SIGNAL_KILL: | |
272 | return NBSD_SIGKILL; | |
273 | ||
274 | case GDB_SIGNAL_BUS: | |
275 | return NBSD_SIGBUS; | |
276 | ||
277 | case GDB_SIGNAL_SEGV: | |
278 | return NBSD_SIGSEGV; | |
279 | ||
280 | case GDB_SIGNAL_SYS: | |
281 | return NBSD_SIGSYS; | |
282 | ||
283 | case GDB_SIGNAL_PIPE: | |
284 | return NBSD_SIGPIPE; | |
285 | ||
286 | case GDB_SIGNAL_ALRM: | |
287 | return NBSD_SIGALRM; | |
288 | ||
289 | case GDB_SIGNAL_TERM: | |
290 | return NBSD_SIGTERM; | |
291 | ||
292 | case GDB_SIGNAL_URG: | |
293 | return NBSD_SIGSTOP; | |
294 | ||
295 | case GDB_SIGNAL_TSTP: | |
296 | return NBSD_SIGTSTP; | |
297 | ||
298 | case GDB_SIGNAL_CONT: | |
299 | return NBSD_SIGCONT; | |
300 | ||
301 | case GDB_SIGNAL_CHLD: | |
302 | return NBSD_SIGCHLD; | |
303 | ||
304 | case GDB_SIGNAL_TTIN: | |
305 | return NBSD_SIGTTIN; | |
306 | ||
307 | case GDB_SIGNAL_TTOU: | |
308 | return NBSD_SIGTTOU; | |
309 | ||
310 | case GDB_SIGNAL_IO: | |
311 | return NBSD_SIGIO; | |
312 | ||
313 | case GDB_SIGNAL_XCPU: | |
314 | return NBSD_SIGXCPU; | |
315 | ||
316 | case GDB_SIGNAL_XFSZ: | |
317 | return NBSD_SIGXFSZ; | |
318 | ||
319 | case GDB_SIGNAL_VTALRM: | |
320 | return NBSD_SIGVTALRM; | |
321 | ||
322 | case GDB_SIGNAL_PROF: | |
323 | return NBSD_SIGPROF; | |
324 | ||
325 | case GDB_SIGNAL_WINCH: | |
326 | return NBSD_SIGWINCH; | |
327 | ||
328 | case GDB_SIGNAL_INFO: | |
329 | return NBSD_SIGINFO; | |
330 | ||
331 | case GDB_SIGNAL_USR1: | |
332 | return NBSD_SIGUSR1; | |
333 | ||
334 | case GDB_SIGNAL_USR2: | |
335 | return NBSD_SIGUSR2; | |
336 | ||
337 | case GDB_SIGNAL_PWR: | |
338 | return NBSD_SIGPWR; | |
339 | ||
340 | /* GDB_SIGNAL_REALTIME_33 is not continuous in <gdb/signals.def>, | |
341 | therefore we have to handle it here. */ | |
342 | case GDB_SIGNAL_REALTIME_33: | |
343 | return NBSD_SIGRTMIN; | |
344 | ||
345 | /* Same comment applies to _64. */ | |
346 | case GDB_SIGNAL_REALTIME_63: | |
347 | return NBSD_SIGRTMAX; | |
348 | } | |
349 | ||
350 | if (signal >= GDB_SIGNAL_REALTIME_34 | |
351 | && signal <= GDB_SIGNAL_REALTIME_62) | |
352 | { | |
353 | int offset = signal - GDB_SIGNAL_REALTIME_32; | |
354 | ||
355 | return NBSD_SIGRTMIN + 1 + offset; | |
356 | } | |
357 | ||
358 | return -1; | |
359 | } | |
360 | ||
063f8e80 KR |
361 | /* Shared library resolver handling. */ |
362 | ||
363 | static CORE_ADDR | |
364 | nbsd_skip_solib_resolver (struct gdbarch *gdbarch, CORE_ADDR pc) | |
365 | { | |
366 | struct bound_minimal_symbol msym; | |
367 | ||
368 | msym = lookup_minimal_symbol ("_rtld_bind_start", NULL, NULL); | |
369 | if (msym.minsym && BMSYMBOL_VALUE_ADDRESS (msym) == pc) | |
370 | return frame_unwind_caller_pc (get_current_frame ()); | |
371 | else | |
372 | return find_solib_trampoline_target (get_current_frame (), pc); | |
373 | } | |
374 | ||
79743962 KR |
375 | /* See nbsd-tdep.h. */ |
376 | ||
54b8cbd0 KR |
377 | void |
378 | nbsd_info_proc_mappings_header (int addr_bit) | |
379 | { | |
380 | printf_filtered (_("Mapped address spaces:\n\n")); | |
381 | if (addr_bit == 64) | |
382 | { | |
383 | printf_filtered (" %18s %18s %10s %10s %9s %s\n", | |
384 | "Start Addr", | |
385 | " End Addr", | |
386 | " Size", " Offset", "Flags ", "File"); | |
387 | } | |
388 | else | |
389 | { | |
390 | printf_filtered ("\t%10s %10s %10s %10s %9s %s\n", | |
391 | "Start Addr", | |
392 | " End Addr", | |
393 | " Size", " Offset", "Flags ", "File"); | |
394 | } | |
395 | } | |
396 | ||
397 | /* Helper function to generate mappings flags for a single VM map | |
398 | entry in 'info proc mappings'. */ | |
399 | ||
400 | static const char * | |
401 | nbsd_vm_map_entry_flags (int kve_flags, int kve_protection) | |
402 | { | |
403 | static char vm_flags[9]; | |
404 | ||
405 | vm_flags[0] = (kve_protection & KINFO_VME_PROT_READ) ? 'r' : '-'; | |
406 | vm_flags[1] = (kve_protection & KINFO_VME_PROT_WRITE) ? 'w' : '-'; | |
407 | vm_flags[2] = (kve_protection & KINFO_VME_PROT_EXEC) ? 'x' : '-'; | |
408 | vm_flags[3] = ' '; | |
409 | vm_flags[4] = (kve_flags & KINFO_VME_FLAG_COW) ? 'C' : '-'; | |
410 | vm_flags[5] = (kve_flags & KINFO_VME_FLAG_NEEDS_COPY) ? 'N' : '-'; | |
411 | vm_flags[6] = (kve_flags & KINFO_VME_FLAG_PAGEABLE) ? 'P' : '-'; | |
412 | vm_flags[7] = (kve_flags & KINFO_VME_FLAG_GROWS_UP) ? 'U' | |
413 | : (kve_flags & KINFO_VME_FLAG_GROWS_DOWN) ? 'D' : '-'; | |
414 | vm_flags[8] = '\0'; | |
415 | ||
416 | return vm_flags; | |
417 | } | |
418 | ||
419 | void | |
420 | nbsd_info_proc_mappings_entry (int addr_bit, ULONGEST kve_start, | |
421 | ULONGEST kve_end, ULONGEST kve_offset, | |
422 | int kve_flags, int kve_protection, | |
423 | const char *kve_path) | |
424 | { | |
425 | if (addr_bit == 64) | |
426 | { | |
427 | printf_filtered (" %18s %18s %10s %10s %9s %s\n", | |
428 | hex_string (kve_start), | |
429 | hex_string (kve_end), | |
430 | hex_string (kve_end - kve_start), | |
431 | hex_string (kve_offset), | |
432 | nbsd_vm_map_entry_flags (kve_flags, kve_protection), | |
433 | kve_path); | |
434 | } | |
435 | else | |
436 | { | |
437 | printf_filtered ("\t%10s %10s %10s %10s %9s %s\n", | |
438 | hex_string (kve_start), | |
439 | hex_string (kve_end), | |
440 | hex_string (kve_end - kve_start), | |
441 | hex_string (kve_offset), | |
442 | nbsd_vm_map_entry_flags (kve_flags, kve_protection), | |
443 | kve_path); | |
444 | } | |
445 | } | |
446 | ||
447 | /* See nbsd-tdep.h. */ | |
448 | ||
79743962 KR |
449 | void |
450 | nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
451 | { | |
452 | set_gdbarch_gdb_signal_from_target (gdbarch, nbsd_gdb_signal_from_target); | |
453 | set_gdbarch_gdb_signal_to_target (gdbarch, nbsd_gdb_signal_to_target); | |
063f8e80 | 454 | set_gdbarch_skip_solib_resolver (gdbarch, nbsd_skip_solib_resolver); |
206c98a6 | 455 | set_gdbarch_auxv_parse (gdbarch, svr4_auxv_parse); |
79743962 | 456 | } |