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bb140953 JL |
1 | /* Handle HP SOM shared libraries for GDB, the GNU Debugger. |
2 | Copyright 1993 Free Software Foundation, Inc. | |
b1c6705a | 3 | |
bb140953 JL |
4 | This file is part of GDB. |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
6c9638b4 | 18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
bb140953 JL |
19 | |
20 | Written by the Center for Software Science at the Univerity of Utah | |
21 | and by Cygnus Support. */ | |
22 | ||
23 | ||
24 | #include "defs.h" | |
25 | ||
26 | #include "frame.h" | |
27 | #include "bfd.h" | |
28 | #include "som.h" | |
29 | #include "libhppa.h" | |
30 | #include "gdbcore.h" | |
31 | #include "symtab.h" | |
32 | #include "breakpoint.h" | |
33 | #include "symfile.h" | |
34 | #include "objfiles.h" | |
35 | #include "inferior.h" | |
99e0981c | 36 | #include "gdb-stabs.h" |
2e977a3a | 37 | #include "gdbcmd.h" |
bb140953 | 38 | |
b1c6705a JL |
39 | /* TODO: |
40 | ||
b1c6705a JL |
41 | * Most of this code should work for hp300 shared libraries. Does |
42 | anyone care enough to weed out any SOM-isms. | |
43 | ||
44 | * Do we need/want a command to load a shared library? | |
45 | ||
b1c6705a JL |
46 | * Support for hpux8 dynamic linker. |
47 | ||
48 | * Support for tracking user calls to dld_load, dld_unload. */ | |
49 | ||
50 | /* The basic structure which describes a dynamically loaded object. This | |
51 | data structure is private to the dynamic linker and isn't found in | |
52 | any HPUX include file. */ | |
bb140953 JL |
53 | |
54 | struct som_solib_mapped_entry | |
55 | { | |
56 | /* The name of the library. */ | |
57 | char *name; | |
58 | ||
b1c6705a | 59 | /* Version of this structure (it is expected to change again in hpux10). */ |
bb140953 JL |
60 | unsigned char struct_version; |
61 | ||
62 | /* Binding mode for this library. */ | |
63 | unsigned char bind_mode; | |
64 | ||
65 | /* Version of this library. */ | |
66 | short library_version; | |
67 | ||
68 | /* Start of text address, link-time text location, end of text address. */ | |
69 | CORE_ADDR text_addr; | |
70 | CORE_ADDR text_link_addr; | |
71 | CORE_ADDR text_end; | |
72 | ||
73 | /* Start of data, start of bss and end of data. */ | |
74 | CORE_ADDR data_start; | |
75 | CORE_ADDR bss_start; | |
76 | CORE_ADDR data_end; | |
77 | ||
78 | /* Value of linkage pointer (%r19). */ | |
79 | CORE_ADDR got_value; | |
80 | ||
81 | /* Next entry. */ | |
82 | struct som_solib_mapped_entry *next; | |
83 | ||
84 | /* There are other fields, but I don't have information as to what is | |
85 | contained in them. */ | |
86 | }; | |
87 | ||
b1c6705a JL |
88 | /* A structure to keep track of all the known shared objects. */ |
89 | struct so_list | |
90 | { | |
91 | struct som_solib_mapped_entry som_solib; | |
92 | struct objfile *objfile; | |
93 | bfd *abfd; | |
94 | struct section_table *sections; | |
95 | struct section_table *sections_end; | |
96 | struct so_list *next; | |
97 | }; | |
98 | ||
2e977a3a JL |
99 | /* If true, then shared library symbols will be added automatically |
100 | when the inferior is created. This is almost always what users | |
101 | will want to have happen; but for very large programs, the startup | |
102 | time will be excessive, and so if this is a problem, the user can | |
103 | clear this flag and then add the shared library symbols as needed. | |
104 | Note that there is a potential for confusion, since if the shared | |
105 | library symbols are not loaded, commands like "info fun" will *not* | |
106 | report all the functions that are actually present. */ | |
107 | ||
108 | int auto_solib_add_at_startup = 1; | |
109 | ||
b1c6705a JL |
110 | static struct so_list *so_list_head; |
111 | ||
112 | static void som_sharedlibrary_info_command PARAMS ((char *, int)); | |
113 | ||
bb140953 JL |
114 | /* Add symbols from shared libraries into the symtab list. */ |
115 | ||
116 | void | |
117 | som_solib_add (arg_string, from_tty, target) | |
118 | char *arg_string; | |
119 | int from_tty; | |
120 | struct target_ops *target; | |
b1c6705a | 121 | { |
bb140953 | 122 | struct minimal_symbol *msymbol; |
b1c6705a | 123 | struct so_list *so_list_tail; |
bb140953 | 124 | CORE_ADDR addr; |
b1c6705a | 125 | asection *shlib_info; |
bb140953 | 126 | int status; |
c2e00af6 | 127 | unsigned int dld_flags; |
156285aa JL |
128 | char buf[4], *re_err; |
129 | ||
130 | /* First validate our arguments. */ | |
131 | if ((re_err = re_comp (arg_string ? arg_string : ".")) != NULL) | |
132 | { | |
133 | error ("Invalid regexp: %s", re_err); | |
134 | } | |
bb140953 | 135 | |
c2e00af6 JL |
136 | /* If we're debugging a core file, or have attached to a running |
137 | process, then som_solib_create_inferior_hook will not have been | |
138 | called. | |
139 | ||
b1c6705a JL |
140 | We need to first determine if we're dealing with a dynamically |
141 | linked executable. If not, then return without an error or warning. | |
142 | ||
143 | We also need to examine __dld_flags to determine if the shared library | |
144 | list is valid and to determine if the libraries have been privately | |
c2e00af6 | 145 | mapped. */ |
f0c9e9e5 JL |
146 | if (symfile_objfile == NULL) |
147 | return; | |
148 | ||
b1c6705a JL |
149 | /* First see if the objfile was dynamically linked. */ |
150 | shlib_info = bfd_get_section_by_name (symfile_objfile->obfd, "$SHLIB_INFO$"); | |
151 | if (!shlib_info) | |
152 | return; | |
153 | ||
154 | /* It's got a $SHLIB_INFO$ section, make sure it's not empty. */ | |
155 | if (bfd_section_size (symfile_objfile->obfd, shlib_info) == 0) | |
156 | return; | |
157 | ||
2d336b1b | 158 | msymbol = lookup_minimal_symbol ("__dld_flags", NULL, NULL); |
c2e00af6 JL |
159 | if (msymbol == NULL) |
160 | { | |
161 | error ("Unable to find __dld_flags symbol in object file.\n"); | |
162 | return; | |
163 | } | |
164 | ||
165 | addr = SYMBOL_VALUE_ADDRESS (msymbol); | |
166 | /* Read the current contents. */ | |
167 | status = target_read_memory (addr, buf, 4); | |
168 | if (status != 0) | |
169 | { | |
170 | error ("Unable to read __dld_flags\n"); | |
171 | return; | |
172 | } | |
173 | dld_flags = extract_unsigned_integer (buf, 4); | |
174 | ||
175 | /* __dld_list may not be valid. If it's not valid tell the user. */ | |
176 | if ((dld_flags & 4) == 0) | |
177 | { | |
178 | error ("__dld_list is not valid according to __dld_flags.\n"); | |
179 | return; | |
180 | } | |
181 | ||
182 | /* If the libraries were not mapped private, warn the user. */ | |
183 | if ((dld_flags & 1) == 0) | |
b1c6705a | 184 | warning ("The shared libraries were not privately mapped; setting a\nbreakpoint in a shared library will not work until you rerun the program.\n"); |
c2e00af6 | 185 | |
2d336b1b | 186 | msymbol = lookup_minimal_symbol ("__dld_list", NULL, NULL); |
bb140953 JL |
187 | if (!msymbol) |
188 | { | |
189 | /* Older crt0.o files (hpux8) don't have __dld_list as a symbol, | |
190 | but the data is still available if you know where to look. */ | |
2d336b1b | 191 | msymbol = lookup_minimal_symbol ("__dld_flags", NULL, NULL); |
bb140953 JL |
192 | if (!msymbol) |
193 | { | |
194 | error ("Unable to find dynamic library list.\n"); | |
195 | return; | |
196 | } | |
197 | addr = SYMBOL_VALUE_ADDRESS (msymbol) - 8; | |
198 | } | |
199 | else | |
200 | addr = SYMBOL_VALUE_ADDRESS (msymbol); | |
201 | ||
202 | status = target_read_memory (addr, buf, 4); | |
203 | if (status != 0) | |
204 | { | |
205 | error ("Unable to find dynamic library list.\n"); | |
206 | return; | |
207 | } | |
208 | ||
209 | addr = extract_unsigned_integer (buf, 4); | |
210 | ||
211 | /* If addr is zero, then we're using an old dynamic loader which | |
212 | doesn't maintain __dld_list. We'll have to use a completely | |
213 | different approach to get shared library information. */ | |
214 | if (addr == 0) | |
215 | goto old_dld; | |
216 | ||
217 | /* Using the information in __dld_list is the preferred method | |
218 | to get at shared library information. It doesn't depend on | |
219 | any functions in /usr/lib/end.o and has a chance of working | |
220 | with hpux10 when it is released. */ | |
221 | status = target_read_memory (addr, buf, 4); | |
222 | if (status != 0) | |
223 | { | |
224 | error ("Unable to find dynamic library list.\n"); | |
225 | return; | |
226 | } | |
227 | ||
228 | /* addr now holds the address of the first entry in the dynamic | |
229 | library list. */ | |
230 | addr = extract_unsigned_integer (buf, 4); | |
231 | ||
232 | /* Now that we have a pointer to the dynamic library list, walk | |
156285aa | 233 | through it and add the symbols for each library. */ |
bb140953 | 234 | |
b1c6705a JL |
235 | so_list_tail = so_list_head; |
236 | /* Find the end of the list of shared objects. */ | |
237 | while (so_list_tail && so_list_tail->next) | |
238 | so_list_tail = so_list_tail->next; | |
239 | ||
bb140953 JL |
240 | while (1) |
241 | { | |
242 | CORE_ADDR name_addr, text_addr; | |
243 | unsigned int name_len; | |
244 | char *name; | |
b1c6705a | 245 | struct so_list *new_so; |
156285aa | 246 | struct so_list *so_list = so_list_head; |
b1c6705a JL |
247 | struct section_table *p; |
248 | ||
bb140953 JL |
249 | if (addr == 0) |
250 | break; | |
251 | ||
252 | /* Get a pointer to the name of this library. */ | |
253 | status = target_read_memory (addr, buf, 4); | |
254 | if (status != 0) | |
b1c6705a JL |
255 | goto err; |
256 | ||
bb140953 JL |
257 | name_addr = extract_unsigned_integer (buf, 4); |
258 | name_len = 0; | |
259 | while (1) | |
260 | { | |
261 | target_read_memory (name_addr + name_len, buf, 1); | |
262 | if (status != 0) | |
b1c6705a JL |
263 | goto err; |
264 | ||
bb140953 JL |
265 | name_len++; |
266 | if (*buf == '\0') | |
267 | break; | |
268 | } | |
269 | name = alloca (name_len); | |
270 | status = target_read_memory (name_addr, name, name_len); | |
271 | if (status != 0) | |
b1c6705a JL |
272 | goto err; |
273 | ||
156285aa JL |
274 | /* See if we've already loaded something with this name. */ |
275 | while (so_list) | |
276 | { | |
277 | if (!strcmp (so_list->som_solib.name, name)) | |
278 | break; | |
279 | so_list = so_list->next; | |
280 | } | |
281 | ||
282 | /* We've already loaded this one or it's the main program, skip it. */ | |
283 | if (so_list || !strcmp (name, symfile_objfile->name)) | |
284 | { | |
285 | status = target_read_memory (addr + 36, buf, 4); | |
286 | if (status != 0) | |
287 | goto err; | |
288 | ||
289 | addr = (CORE_ADDR) extract_unsigned_integer (buf, 4); | |
290 | continue; | |
291 | } | |
292 | ||
bb140953 JL |
293 | name = obsavestring (name, name_len - 1, |
294 | &symfile_objfile->symbol_obstack); | |
295 | ||
296 | status = target_read_memory (addr + 8, buf, 4); | |
297 | if (status != 0) | |
b1c6705a JL |
298 | goto err; |
299 | ||
300 | text_addr = extract_unsigned_integer (buf, 4); | |
301 | ||
302 | ||
303 | new_so = (struct so_list *) malloc (sizeof (struct so_list)); | |
304 | memset ((char *)new_so, 0, sizeof (struct so_list)); | |
305 | if (so_list_head == NULL) | |
bb140953 | 306 | { |
b1c6705a JL |
307 | so_list_head = new_so; |
308 | so_list_tail = new_so; | |
bb140953 | 309 | } |
b1c6705a JL |
310 | else |
311 | { | |
312 | so_list_tail->next = new_so; | |
313 | so_list_tail = new_so; | |
314 | } | |
315 | ||
316 | /* Fill in all the entries in GDB's shared library list. */ | |
317 | new_so->som_solib.name = name; | |
318 | status = target_read_memory (addr + 4, buf, 4); | |
319 | if (status != 0) | |
320 | goto err; | |
321 | ||
322 | new_so->som_solib.struct_version = extract_unsigned_integer (buf + 3, 1); | |
323 | new_so->som_solib.bind_mode = extract_unsigned_integer (buf + 2, 1); | |
324 | new_so->som_solib.library_version = extract_unsigned_integer (buf, 2); | |
325 | new_so->som_solib.text_addr = text_addr; | |
326 | ||
327 | status = target_read_memory (addr + 12, buf, 4); | |
328 | if (status != 0) | |
329 | goto err; | |
330 | ||
331 | new_so->som_solib.text_link_addr = extract_unsigned_integer (buf, 4); | |
bb140953 | 332 | |
b1c6705a JL |
333 | status = target_read_memory (addr + 16, buf, 4); |
334 | if (status != 0) | |
335 | goto err; | |
336 | ||
337 | new_so->som_solib.text_end = extract_unsigned_integer (buf, 4); | |
338 | ||
339 | status = target_read_memory (addr + 20, buf, 4); | |
340 | if (status != 0) | |
341 | goto err; | |
342 | ||
343 | new_so->som_solib.data_start = extract_unsigned_integer (buf, 4); | |
344 | ||
345 | status = target_read_memory (addr + 24, buf, 4); | |
346 | if (status != 0) | |
347 | goto err; | |
348 | ||
349 | new_so->som_solib.bss_start = extract_unsigned_integer (buf, 4); | |
350 | ||
351 | status = target_read_memory (addr + 28, buf, 4); | |
352 | if (status != 0) | |
353 | goto err; | |
354 | ||
355 | new_so->som_solib.data_end = extract_unsigned_integer (buf, 4); | |
356 | ||
357 | status = target_read_memory (addr + 32, buf, 4); | |
358 | if (status != 0) | |
359 | goto err; | |
360 | ||
361 | new_so->som_solib.got_value = extract_unsigned_integer (buf, 4); | |
bb140953 | 362 | |
bb140953 JL |
363 | status = target_read_memory (addr + 36, buf, 4); |
364 | if (status != 0) | |
b1c6705a JL |
365 | goto err; |
366 | ||
367 | new_so->som_solib.next = (void *)extract_unsigned_integer (buf, 4); | |
368 | addr = (CORE_ADDR)new_so->som_solib.next; | |
369 | ||
370 | new_so->objfile = symbol_file_add (name, from_tty, text_addr, 0, 0, 0); | |
506af7a7 | 371 | new_so->abfd = new_so->objfile->obfd; |
b1c6705a JL |
372 | |
373 | if (!bfd_check_format (new_so->abfd, bfd_object)) | |
374 | { | |
375 | error ("\"%s\": not in executable format: %s.", | |
376 | name, bfd_errmsg (bfd_get_error ())); | |
377 | } | |
378 | ||
379 | /* Now we need to build a section table for this library since | |
380 | we might be debugging a core file from a dynamically linked | |
381 | executable in which the libraries were not privately mapped. */ | |
382 | if (build_section_table (new_so->abfd, | |
383 | &new_so->sections, | |
384 | &new_so->sections_end)) | |
bb140953 | 385 | { |
b1c6705a | 386 | error ("Unable to build section table for shared library\n."); |
bb140953 JL |
387 | return; |
388 | } | |
b1c6705a JL |
389 | |
390 | /* Relocate all the sections based on where they got loaded. */ | |
391 | for (p = new_so->sections; p < new_so->sections_end; p++) | |
392 | { | |
393 | if (p->the_bfd_section->flags & SEC_CODE) | |
394 | { | |
395 | p->addr += text_addr - new_so->som_solib.text_link_addr; | |
396 | p->endaddr += text_addr - new_so->som_solib.text_link_addr; | |
397 | } | |
398 | else if (p->the_bfd_section->flags & SEC_DATA) | |
399 | { | |
400 | p->addr += new_so->som_solib.data_start; | |
401 | p->endaddr += new_so->som_solib.data_start; | |
402 | } | |
403 | } | |
404 | ||
405 | /* Now see if we need to map in the text and data for this shared | |
406 | library (for example debugging a core file which does not use | |
407 | private shared libraries.). | |
408 | ||
409 | Carefully peek at the first text address in the library. If the | |
410 | read succeeds, then the libraries were privately mapped and were | |
411 | included in the core dump file. | |
412 | ||
413 | If the peek failed, then the libraries were not privately mapped | |
414 | and are not in the core file, we'll have to read them in ourselves. */ | |
415 | status = target_read_memory (text_addr, buf, 4); | |
416 | if (status != 0) | |
417 | { | |
9bfed1ee | 418 | int old, new; |
b1c6705a | 419 | |
9bfed1ee | 420 | new = new_so->sections_end - new_so->sections; |
b1c6705a JL |
421 | /* Add sections from the shared library to the core target. */ |
422 | if (target->to_sections) | |
423 | { | |
424 | old = target->to_sections_end - target->to_sections; | |
425 | target->to_sections = (struct section_table *) | |
426 | xrealloc ((char *)target->to_sections, | |
9bfed1ee | 427 | ((sizeof (struct section_table)) * (old + new))); |
b1c6705a JL |
428 | } |
429 | else | |
430 | { | |
431 | old = 0; | |
432 | target->to_sections = (struct section_table *) | |
9bfed1ee | 433 | xmalloc ((sizeof (struct section_table)) * new); |
b1c6705a | 434 | } |
9bfed1ee | 435 | target->to_sections_end = (target->to_sections + old + new); |
b1c6705a JL |
436 | memcpy ((char *)(target->to_sections + old), |
437 | new_so->sections, | |
9bfed1ee | 438 | ((sizeof (struct section_table)) * new)); |
b1c6705a | 439 | } |
bb140953 JL |
440 | } |
441 | ||
442 | /* Getting new symbols may change our opinion about what is | |
443 | frameless. */ | |
444 | reinit_frame_cache (); | |
445 | return; | |
446 | ||
447 | old_dld: | |
448 | error ("Debugging dynamic executables loaded via the hpux8 dld.sl is not supported.\n"); | |
449 | return; | |
b1c6705a JL |
450 | |
451 | err: | |
452 | error ("Error while reading dynamic library list.\n"); | |
453 | return; | |
bb140953 JL |
454 | } |
455 | ||
b1c6705a | 456 | |
bb140953 JL |
457 | /* This hook gets called just before the first instruction in the |
458 | inferior process is executed. | |
459 | ||
460 | This is our opportunity to set magic flags in the inferior so | |
461 | that GDB can be notified when a shared library is mapped in and | |
462 | to tell the dynamic linker that a private copy of the library is | |
463 | needed (so GDB can set breakpoints in the library). | |
464 | ||
465 | __dld_flags is the location of the magic flags; as of this implementation | |
466 | there are 3 flags of interest: | |
467 | ||
468 | bit 0 when set indicates that private copies of the libraries are needed | |
469 | bit 1 when set indicates that the callback hook routine is valid | |
470 | bit 2 when set indicates that the dynamic linker should maintain the | |
471 | __dld_list structure when loading/unloading libraries. | |
472 | ||
473 | Note that shared libraries are not mapped in at this time, so we have | |
474 | run the inferior until the libraries are mapped in. Typically this | |
475 | means running until the "_start" is called. */ | |
b1c6705a JL |
476 | |
477 | void | |
bb140953 JL |
478 | som_solib_create_inferior_hook() |
479 | { | |
480 | struct minimal_symbol *msymbol; | |
bb140953 | 481 | unsigned int dld_flags, status; |
b1c6705a | 482 | asection *shlib_info; |
bb140953 JL |
483 | char shadow_contents[BREAKPOINT_MAX], buf[4]; |
484 | CORE_ADDR anaddr; | |
485 | ||
f0c9e9e5 JL |
486 | if (symfile_objfile == NULL) |
487 | return; | |
488 | ||
bb140953 JL |
489 | /* First see if the objfile was dynamically linked. */ |
490 | shlib_info = bfd_get_section_by_name (symfile_objfile->obfd, "$SHLIB_INFO$"); | |
491 | if (!shlib_info) | |
492 | return; | |
493 | ||
494 | /* It's got a $SHLIB_INFO$ section, make sure it's not empty. */ | |
495 | if (bfd_section_size (symfile_objfile->obfd, shlib_info) == 0) | |
496 | return; | |
497 | ||
498 | /* Get the address of __dld_flags, if no such symbol exists, then we can | |
499 | not debug the shared code. */ | |
2d336b1b | 500 | msymbol = lookup_minimal_symbol ("__dld_flags", NULL, NULL); |
bb140953 JL |
501 | if (msymbol == NULL) |
502 | { | |
503 | error ("Unable to find __dld_flags symbol in object file.\n"); | |
504 | return; | |
505 | } | |
506 | ||
507 | anaddr = SYMBOL_VALUE_ADDRESS (msymbol); | |
508 | /* Read the current contents. */ | |
509 | status = target_read_memory (anaddr, buf, 4); | |
510 | if (status != 0) | |
511 | { | |
512 | error ("Unable to read __dld_flags\n"); | |
513 | return; | |
514 | } | |
515 | dld_flags = extract_unsigned_integer (buf, 4); | |
516 | ||
517 | /* Turn on the flags we care about. */ | |
518 | dld_flags |= 0x5; | |
519 | store_unsigned_integer (buf, 4, dld_flags); | |
520 | status = target_write_memory (anaddr, buf, 4); | |
521 | if (status != 0) | |
522 | { | |
523 | error ("Unable to write __dld_flags\n"); | |
524 | return; | |
525 | } | |
526 | ||
527 | /* Now find the address of _start and set a breakpoint there. */ | |
2d336b1b | 528 | msymbol = lookup_minimal_symbol ("_start", NULL, symfile_objfile); |
bb140953 JL |
529 | if (msymbol == NULL) |
530 | { | |
531 | error ("Unable to find _start symbol in object file.\n"); | |
532 | return; | |
533 | } | |
534 | ||
535 | anaddr = SYMBOL_VALUE_ADDRESS (msymbol); | |
536 | if (target_insert_breakpoint (anaddr, shadow_contents)) | |
537 | { | |
538 | error ("Unable to set breakpoint at _start.\n"); | |
539 | return; | |
540 | } | |
541 | ||
b1c6705a JL |
542 | /* Wipe out all knowledge of old shared libraries since their |
543 | mapping can change from one exec to another! */ | |
544 | while (so_list_head) | |
545 | { | |
546 | struct so_list *temp; | |
547 | ||
548 | free_objfile (so_list_head->objfile); | |
549 | temp = so_list_head; | |
550 | free (so_list_head); | |
551 | so_list_head = temp->next; | |
552 | } | |
553 | ||
bb140953 JL |
554 | /* Start the process again and wait for it to hit our breakpoint. */ |
555 | clear_proceed_status (); | |
556 | stop_soon_quietly = 1; | |
557 | stop_signal = TARGET_SIGNAL_0; | |
558 | do | |
559 | { | |
560 | target_resume (-1, 0, stop_signal); | |
561 | wait_for_inferior (); | |
562 | } | |
563 | while (stop_signal != TARGET_SIGNAL_TRAP); | |
564 | stop_soon_quietly = 0; | |
565 | ||
566 | /* All the libraries should be mapped in now. Remove our breakpoint and | |
567 | read in the symbol tables from the shared libraries. */ | |
568 | if (target_remove_breakpoint (anaddr, shadow_contents)) | |
569 | { | |
570 | error ("Unable to remove breakpoint at _start.\n"); | |
571 | return; | |
572 | } | |
573 | ||
2e977a3a JL |
574 | if (auto_solib_add_at_startup) |
575 | som_solib_add ((char *) 0, 0, (struct target_ops *) 0); | |
bb140953 | 576 | } |
b1c6705a | 577 | |
b1bbe38b JL |
578 | /* Return the GOT value for the shared library in which ADDR belongs. If |
579 | ADDR isn't in any known shared library, return zero. */ | |
580 | ||
581 | CORE_ADDR | |
582 | som_solib_get_got_by_pc (addr) | |
583 | CORE_ADDR addr; | |
584 | { | |
585 | struct so_list *so_list = so_list_head; | |
586 | CORE_ADDR got_value = 0; | |
587 | ||
588 | while (so_list) | |
589 | { | |
590 | if (so_list->som_solib.text_addr <= addr | |
591 | && so_list->som_solib.text_end > addr) | |
592 | { | |
593 | got_value = so_list->som_solib.got_value; | |
594 | break; | |
595 | } | |
596 | so_list = so_list->next; | |
597 | } | |
598 | return got_value; | |
599 | } | |
600 | ||
506af7a7 JL |
601 | int |
602 | som_solib_section_offsets (objfile, offsets) | |
603 | struct objfile *objfile; | |
604 | struct section_offsets *offsets; | |
605 | { | |
606 | struct so_list *so_list = so_list_head; | |
607 | ||
608 | while (so_list) | |
609 | { | |
610 | /* Oh what a pain! We need the offsets before so_list->objfile | |
611 | is valid. The BFDs will never match. Make a best guess. */ | |
fbf8d7e1 | 612 | if (strstr (objfile->name, so_list->som_solib.name)) |
506af7a7 JL |
613 | { |
614 | asection *private_section; | |
615 | ||
616 | /* The text offset is easy. */ | |
99e0981c JL |
617 | ANOFFSET (offsets, SECT_OFF_TEXT) |
618 | = (so_list->som_solib.text_addr | |
619 | - so_list->som_solib.text_link_addr); | |
620 | ANOFFSET (offsets, SECT_OFF_RODATA) | |
621 | = ANOFFSET (offsets, SECT_OFF_TEXT); | |
506af7a7 JL |
622 | |
623 | /* We should look at presumed_dp in the SOM header, but | |
624 | that's not easily available. This should be OK though. */ | |
625 | private_section = bfd_get_section_by_name (objfile->obfd, | |
626 | "$PRIVATE$"); | |
627 | if (!private_section) | |
628 | { | |
629 | warning ("Unable to find $PRIVATE$ in shared library!"); | |
99e0981c JL |
630 | ANOFFSET (offsets, SECT_OFF_DATA) = 0; |
631 | ANOFFSET (offsets, SECT_OFF_BSS) = 0; | |
506af7a7 JL |
632 | return 1; |
633 | } | |
99e0981c JL |
634 | ANOFFSET (offsets, SECT_OFF_DATA) |
635 | = (so_list->som_solib.data_start - private_section->vma); | |
636 | ANOFFSET (offsets, SECT_OFF_BSS) | |
637 | = ANOFFSET (offsets, SECT_OFF_DATA); | |
506af7a7 JL |
638 | return 1; |
639 | } | |
640 | so_list = so_list->next; | |
641 | } | |
642 | return 0; | |
643 | } | |
644 | ||
b1c6705a JL |
645 | /* Dump information about all the currently loaded shared libraries. */ |
646 | ||
647 | static void | |
648 | som_sharedlibrary_info_command (ignore, from_tty) | |
649 | char *ignore; | |
650 | int from_tty; | |
651 | { | |
652 | struct so_list *so_list = so_list_head; | |
653 | ||
654 | if (exec_bfd == NULL) | |
655 | { | |
656 | printf_unfiltered ("no exec file.\n"); | |
657 | return; | |
658 | } | |
659 | ||
660 | if (so_list == NULL) | |
661 | { | |
662 | printf_unfiltered ("No shared libraries loaded at this time.\n"); | |
663 | return; | |
664 | } | |
665 | ||
666 | printf_unfiltered ("Shared Object Libraries\n"); | |
667 | printf_unfiltered (" %-12s%-12s%-12s%-12s%-12s%-12s\n", | |
668 | " flags", " tstart", " tend", " dstart", " dend", " dlt"); | |
669 | while (so_list) | |
670 | { | |
671 | unsigned int flags; | |
672 | ||
673 | flags = so_list->som_solib.struct_version << 24; | |
674 | flags |= so_list->som_solib.bind_mode << 16; | |
675 | flags |= so_list->som_solib.library_version; | |
676 | printf_unfiltered ("%s\n", so_list->som_solib.name); | |
677 | printf_unfiltered (" %-12s", local_hex_string_custom (flags, "08l")); | |
678 | printf_unfiltered ("%-12s", | |
679 | local_hex_string_custom (so_list->som_solib.text_addr, "08l")); | |
680 | printf_unfiltered ("%-12s", | |
681 | local_hex_string_custom (so_list->som_solib.text_end, "08l")); | |
682 | printf_unfiltered ("%-12s", | |
683 | local_hex_string_custom (so_list->som_solib.data_start, "08l")); | |
684 | printf_unfiltered ("%-12s", | |
685 | local_hex_string_custom (so_list->som_solib.data_end, "08l")); | |
686 | printf_unfiltered ("%-12s\n", | |
687 | local_hex_string_custom (so_list->som_solib.got_value, "08l")); | |
688 | so_list = so_list->next; | |
689 | } | |
690 | } | |
691 | ||
156285aa JL |
692 | static void |
693 | som_solib_sharedlibrary_command (args, from_tty) | |
694 | char *args; | |
695 | int from_tty; | |
696 | { | |
697 | dont_repeat (); | |
698 | som_solib_add (args, from_tty, (struct target_ops *) 0); | |
699 | } | |
700 | ||
b1c6705a JL |
701 | void |
702 | _initialize_som_solib () | |
703 | { | |
156285aa JL |
704 | add_com ("sharedlibrary", class_files, som_solib_sharedlibrary_command, |
705 | "Load shared object library symbols for files matching REGEXP."); | |
b1c6705a JL |
706 | add_info ("sharedlibrary", som_sharedlibrary_info_command, |
707 | "Status of loaded shared object libraries."); | |
2e977a3a JL |
708 | add_show_from_set |
709 | (add_set_cmd ("auto-solib-add", class_support, var_zinteger, | |
710 | (char *) &auto_solib_add_at_startup, | |
711 | "Set autoloading of shared library symbols at startup.\n\ | |
712 | If nonzero, symbols from all shared object libraries will be loaded\n\ | |
713 | automatically when the inferior begins execution. Otherwise, symbols\n\ | |
714 | must be loaded manually, using `sharedlibrary'.", | |
715 | &setlist), | |
716 | &showlist); | |
717 | ||
b1c6705a | 718 | } |