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42a4f53d | 1 | /* Copyright (C) 2013-2019 Free Software Foundation, Inc. |
4d1eb6b4 JB |
2 | |
3 | This file is part of GDB. | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 3 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
17 | ||
18 | #include "defs.h" | |
19 | #include "solib-aix.h" | |
20 | #include "solist.h" | |
21 | #include "inferior.h" | |
22 | #include "gdb_bfd.h" | |
23 | #include "gdbcore.h" | |
24 | #include "objfiles.h" | |
25 | #include "symtab.h" | |
26 | #include "xcoffread.h" | |
76727919 | 27 | #include "observable.h" |
4d1eb6b4 | 28 | #include "gdbcmd.h" |
268a13a5 | 29 | #include "gdbsupport/scope-exit.h" |
4d1eb6b4 JB |
30 | |
31 | /* Variable controlling the output of the debugging traces for | |
32 | this module. */ | |
33 | static int solib_aix_debug; | |
34 | ||
35 | /* Our private data in struct so_list. */ | |
36 | ||
d0e449a1 | 37 | struct lm_info_aix : public lm_info_base |
4d1eb6b4 JB |
38 | { |
39 | /* The name of the file mapped by the loader. Apart from the entry | |
40 | for the main executable, this is usually a shared library (which, | |
41 | on AIX, is an archive library file, created using the "ar" | |
42 | command). */ | |
6c401f72 | 43 | std::string filename; |
4d1eb6b4 JB |
44 | |
45 | /* The name of the shared object file with the actual dynamic | |
6c401f72 SM |
46 | loading dependency. This may be empty (Eg. main executable). */ |
47 | std::string member_name; | |
4d1eb6b4 JB |
48 | |
49 | /* The address in inferior memory where the text section got mapped. */ | |
6c401f72 | 50 | CORE_ADDR text_addr = 0; |
4d1eb6b4 JB |
51 | |
52 | /* The size of the text section, obtained via the loader data. */ | |
6c401f72 | 53 | ULONGEST text_size = 0; |
4d1eb6b4 JB |
54 | |
55 | /* The address in inferior memory where the data section got mapped. */ | |
6c401f72 | 56 | CORE_ADDR data_addr = 0; |
4d1eb6b4 JB |
57 | |
58 | /* The size of the data section, obtained via the loader data. */ | |
6c401f72 | 59 | ULONGEST data_size = 0; |
4d1eb6b4 JB |
60 | }; |
61 | ||
4d1eb6b4 JB |
62 | /* This module's per-inferior data. */ |
63 | ||
64 | struct solib_aix_inferior_data | |
65 | { | |
a269fbf1 | 66 | /* The list of shared libraries. |
4d1eb6b4 JB |
67 | |
68 | Note that the first element of this list is always the main | |
69 | executable, which is not technically a shared library. But | |
70 | we need that information to perform its relocation, and | |
71 | the same principles applied to shared libraries also apply | |
72 | to the main executable. So it's simpler to keep it as part | |
73 | of this list. */ | |
a269fbf1 | 74 | gdb::optional<std::vector<lm_info_aix>> library_list; |
4d1eb6b4 JB |
75 | }; |
76 | ||
77 | /* Key to our per-inferior data. */ | |
a269fbf1 | 78 | static inferior_key<solib_aix_inferior_data> solib_aix_inferior_data_handle; |
4d1eb6b4 JB |
79 | |
80 | /* Return this module's data for the given inferior. | |
81 | If none is found, add a zero'ed one now. */ | |
82 | ||
83 | static struct solib_aix_inferior_data * | |
84 | get_solib_aix_inferior_data (struct inferior *inf) | |
85 | { | |
86 | struct solib_aix_inferior_data *data; | |
87 | ||
a269fbf1 | 88 | data = solib_aix_inferior_data_handle.get (inf); |
4d1eb6b4 | 89 | if (data == NULL) |
a269fbf1 | 90 | data = solib_aix_inferior_data_handle.emplace (inf); |
4d1eb6b4 JB |
91 | |
92 | return data; | |
93 | } | |
94 | ||
95 | #if !defined(HAVE_LIBEXPAT) | |
96 | ||
97 | /* Dummy implementation if XML support is not compiled in. */ | |
98 | ||
a269fbf1 | 99 | static gdb::optional<std::vector<lm_info_aix>> |
4d1eb6b4 JB |
100 | solib_aix_parse_libraries (const char *library) |
101 | { | |
102 | static int have_warned; | |
103 | ||
104 | if (!have_warned) | |
105 | { | |
106 | have_warned = 1; | |
107 | warning (_("Can not parse XML library list; XML support was disabled " | |
108 | "at compile time")); | |
109 | } | |
110 | ||
a269fbf1 | 111 | return {}; |
814a3ff7 JB |
112 | } |
113 | ||
4d1eb6b4 JB |
114 | #else /* HAVE_LIBEXPAT */ |
115 | ||
116 | #include "xml-support.h" | |
117 | ||
118 | /* Handle the start of a <library> element. */ | |
119 | ||
120 | static void | |
121 | library_list_start_library (struct gdb_xml_parser *parser, | |
122 | const struct gdb_xml_element *element, | |
123 | void *user_data, | |
4d0fdd9b | 124 | std::vector<gdb_xml_value> &attributes) |
4d1eb6b4 | 125 | { |
a269fbf1 TT |
126 | std::vector<lm_info_aix> *list = (std::vector<lm_info_aix> *) user_data; |
127 | lm_info_aix item; | |
4d1eb6b4 JB |
128 | struct gdb_xml_value *attr; |
129 | ||
130 | attr = xml_find_attribute (attributes, "name"); | |
a269fbf1 | 131 | item.filename = (const char *) attr->value.get (); |
4d1eb6b4 JB |
132 | |
133 | attr = xml_find_attribute (attributes, "member"); | |
134 | if (attr != NULL) | |
a269fbf1 | 135 | item.member_name = (const char *) attr->value.get (); |
4d1eb6b4 JB |
136 | |
137 | attr = xml_find_attribute (attributes, "text_addr"); | |
a269fbf1 | 138 | item.text_addr = * (ULONGEST *) attr->value.get (); |
4d1eb6b4 JB |
139 | |
140 | attr = xml_find_attribute (attributes, "text_size"); | |
a269fbf1 | 141 | item.text_size = * (ULONGEST *) attr->value.get (); |
4d1eb6b4 JB |
142 | |
143 | attr = xml_find_attribute (attributes, "data_addr"); | |
a269fbf1 | 144 | item.data_addr = * (ULONGEST *) attr->value.get (); |
4d1eb6b4 JB |
145 | |
146 | attr = xml_find_attribute (attributes, "data_size"); | |
a269fbf1 | 147 | item.data_size = * (ULONGEST *) attr->value.get (); |
4d1eb6b4 | 148 | |
a269fbf1 | 149 | list->push_back (std::move (item)); |
4d1eb6b4 JB |
150 | } |
151 | ||
8c56e112 | 152 | /* Handle the start of a <library-list-aix> element. */ |
4d1eb6b4 JB |
153 | |
154 | static void | |
155 | library_list_start_list (struct gdb_xml_parser *parser, | |
156 | const struct gdb_xml_element *element, | |
4d0fdd9b SM |
157 | void *user_data, |
158 | std::vector<gdb_xml_value> &attributes) | |
4d1eb6b4 | 159 | { |
4d0fdd9b SM |
160 | char *version |
161 | = (char *) xml_find_attribute (attributes, "version")->value.get (); | |
4d1eb6b4 JB |
162 | |
163 | if (strcmp (version, "1.0") != 0) | |
164 | gdb_xml_error (parser, | |
165 | _("Library list has unsupported version \"%s\""), | |
166 | version); | |
167 | } | |
168 | ||
4d1eb6b4 | 169 | /* The allowed elements and attributes for an AIX library list |
8c56e112 | 170 | described in XML format. The root element is a <library-list-aix>. */ |
4d1eb6b4 JB |
171 | |
172 | static const struct gdb_xml_attribute library_attributes[] = | |
173 | { | |
174 | { "name", GDB_XML_AF_NONE, NULL, NULL }, | |
175 | { "member", GDB_XML_AF_OPTIONAL, NULL, NULL }, | |
176 | { "text_addr", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL }, | |
177 | { "text_size", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL }, | |
178 | { "data_addr", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL }, | |
179 | { "data_size", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL }, | |
180 | { NULL, GDB_XML_AF_NONE, NULL, NULL } | |
181 | }; | |
182 | ||
183 | static const struct gdb_xml_element library_list_children[] = | |
184 | { | |
185 | { "library", library_attributes, NULL, | |
186 | GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL, | |
187 | library_list_start_library, NULL}, | |
188 | { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } | |
189 | }; | |
190 | ||
191 | static const struct gdb_xml_attribute library_list_attributes[] = | |
192 | { | |
193 | { "version", GDB_XML_AF_NONE, NULL, NULL }, | |
194 | { NULL, GDB_XML_AF_NONE, NULL, NULL } | |
195 | }; | |
196 | ||
197 | static const struct gdb_xml_element library_list_elements[] = | |
198 | { | |
8c56e112 | 199 | { "library-list-aix", library_list_attributes, library_list_children, |
4d1eb6b4 JB |
200 | GDB_XML_EF_NONE, library_list_start_list, NULL }, |
201 | { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } | |
202 | }; | |
203 | ||
204 | /* Parse LIBRARY, a string containing the loader info in XML format, | |
a269fbf1 | 205 | and return a vector of lm_info_aix objects. |
4d1eb6b4 | 206 | |
a269fbf1 | 207 | Return an empty option if the parsing failed. */ |
4d1eb6b4 | 208 | |
a269fbf1 | 209 | static gdb::optional<std::vector<lm_info_aix>> |
4d1eb6b4 JB |
210 | solib_aix_parse_libraries (const char *library) |
211 | { | |
a269fbf1 | 212 | std::vector<lm_info_aix> result; |
4d1eb6b4 JB |
213 | |
214 | if (gdb_xml_parse_quick (_("aix library list"), "library-list-aix.dtd", | |
a269fbf1 TT |
215 | library_list_elements, library, &result) == 0) |
216 | return result; | |
4d1eb6b4 | 217 | |
a269fbf1 | 218 | return {}; |
4d1eb6b4 JB |
219 | } |
220 | ||
221 | #endif /* HAVE_LIBEXPAT */ | |
222 | ||
a269fbf1 TT |
223 | /* Return the loader info for the given inferior (INF), or an empty |
224 | option if the list could not be computed. | |
4d1eb6b4 JB |
225 | |
226 | Cache the result in per-inferior data, so as to avoid recomputing it | |
227 | each time this function is called. | |
228 | ||
229 | If an error occurs while computing this list, and WARNING_MSG | |
230 | is not NULL, then print a warning including WARNING_MSG and | |
231 | a description of the error. */ | |
232 | ||
a269fbf1 | 233 | static gdb::optional<std::vector<lm_info_aix>> & |
4d1eb6b4 JB |
234 | solib_aix_get_library_list (struct inferior *inf, const char *warning_msg) |
235 | { | |
236 | struct solib_aix_inferior_data *data; | |
4d1eb6b4 JB |
237 | |
238 | /* If already computed, return the cached value. */ | |
239 | data = get_solib_aix_inferior_data (inf); | |
a269fbf1 | 240 | if (data->library_list.has_value ()) |
4d1eb6b4 JB |
241 | return data->library_list; |
242 | ||
9018be22 | 243 | gdb::optional<gdb::char_vector> library_document |
8b88a78e | 244 | = target_read_stralloc (current_top_target (), TARGET_OBJECT_LIBRARIES_AIX, |
b7b030ad | 245 | NULL); |
9018be22 | 246 | if (!library_document && warning_msg != NULL) |
4d1eb6b4 | 247 | { |
ff99b71b | 248 | warning (_("%s (failed to read TARGET_OBJECT_LIBRARIES_AIX)"), |
4d1eb6b4 | 249 | warning_msg); |
a269fbf1 | 250 | return data->library_list; |
4d1eb6b4 | 251 | } |
4d1eb6b4 JB |
252 | |
253 | if (solib_aix_debug) | |
254 | fprintf_unfiltered (gdb_stdlog, | |
ff99b71b | 255 | "DEBUG: TARGET_OBJECT_LIBRARIES_AIX = \n%s\n", |
9018be22 | 256 | library_document->data ()); |
4d1eb6b4 | 257 | |
9018be22 | 258 | data->library_list = solib_aix_parse_libraries (library_document->data ()); |
a269fbf1 TT |
259 | if (!data->library_list.has_value () && warning_msg != NULL) |
260 | warning (_("%s (missing XML support?)"), warning_msg); | |
4d1eb6b4 | 261 | |
4d1eb6b4 JB |
262 | return data->library_list; |
263 | } | |
264 | ||
265 | /* If the .bss section's VMA is set to an address located before | |
266 | the end of the .data section, causing the two sections to overlap, | |
267 | return the overlap in bytes. Otherwise, return zero. | |
268 | ||
269 | Motivation: | |
270 | ||
271 | The GNU linker sometimes sets the start address of the .bss session | |
272 | before the end of the .data section, making the 2 sections overlap. | |
273 | The loader appears to handle this situation gracefully, by simply | |
274 | loading the bss section right after the end of the .data section. | |
275 | ||
276 | This means that the .data and the .bss sections are sometimes | |
277 | no longer relocated by the same amount. The problem is that | |
278 | the ldinfo data does not contain any information regarding | |
279 | the relocation of the .bss section, assuming that it would be | |
280 | identical to the information provided for the .data section | |
281 | (this is what would normally happen if the program was linked | |
282 | correctly). | |
283 | ||
284 | GDB therefore needs to detect those cases, and make the corresponding | |
285 | adjustment to the .bss section offset computed from the ldinfo data | |
286 | when necessary. This function returns the adjustment amount (or | |
287 | zero when no adjustment is needed). */ | |
288 | ||
289 | static CORE_ADDR | |
290 | solib_aix_bss_data_overlap (bfd *abfd) | |
291 | { | |
292 | struct bfd_section *data_sect, *bss_sect; | |
293 | ||
294 | data_sect = bfd_get_section_by_name (abfd, ".data"); | |
295 | if (data_sect == NULL) | |
296 | return 0; /* No overlap possible. */ | |
297 | ||
298 | bss_sect = bfd_get_section_by_name (abfd, ".bss"); | |
299 | if (bss_sect == NULL) | |
300 | return 0; /* No overlap possible. */ | |
301 | ||
302 | /* Assume the problem only occurs with linkers that place the .bss | |
303 | section after the .data section (the problem has only been | |
304 | observed when using the GNU linker, and the default linker | |
305 | script always places the .data and .bss sections in that order). */ | |
306 | if (bfd_section_vma (abfd, bss_sect) | |
307 | < bfd_section_vma (abfd, data_sect)) | |
308 | return 0; | |
309 | ||
310 | if (bfd_section_vma (abfd, bss_sect) | |
311 | < bfd_section_vma (abfd, data_sect) + bfd_get_section_size (data_sect)) | |
312 | return ((bfd_section_vma (abfd, data_sect) | |
313 | + bfd_get_section_size (data_sect)) | |
314 | - bfd_section_vma (abfd, bss_sect)); | |
315 | ||
316 | return 0; | |
317 | } | |
318 | ||
319 | /* Implement the "relocate_section_addresses" target_so_ops method. */ | |
320 | ||
321 | static void | |
322 | solib_aix_relocate_section_addresses (struct so_list *so, | |
323 | struct target_section *sec) | |
324 | { | |
4d1eb6b4 | 325 | struct bfd_section *bfd_sect = sec->the_bfd_section; |
57e6060e | 326 | bfd *abfd = bfd_sect->owner; |
4d1eb6b4 | 327 | const char *section_name = bfd_section_name (abfd, bfd_sect); |
d0e449a1 | 328 | lm_info_aix *info = (lm_info_aix *) so->lm_info; |
4d1eb6b4 JB |
329 | |
330 | if (strcmp (section_name, ".text") == 0) | |
331 | { | |
332 | sec->addr = info->text_addr; | |
333 | sec->endaddr = sec->addr + info->text_size; | |
334 | ||
335 | /* The text address given to us by the loader contains | |
336 | XCOFF headers, so we need to adjust by this much. */ | |
337 | sec->addr += bfd_sect->filepos; | |
338 | } | |
339 | else if (strcmp (section_name, ".data") == 0) | |
340 | { | |
341 | sec->addr = info->data_addr; | |
342 | sec->endaddr = sec->addr + info->data_size; | |
343 | } | |
344 | else if (strcmp (section_name, ".bss") == 0) | |
345 | { | |
060cfbef JB |
346 | /* The information provided by the loader does not include |
347 | the address of the .bss section, but we know that it gets | |
348 | relocated by the same offset as the .data section. So, | |
349 | compute the relocation offset for the .data section, and | |
350 | apply it to the .bss section as well. If the .data section | |
351 | is not defined (which seems highly unlikely), do our best | |
352 | by assuming no relocation. */ | |
353 | struct bfd_section *data_sect | |
354 | = bfd_get_section_by_name (abfd, ".data"); | |
355 | CORE_ADDR data_offset = 0; | |
356 | ||
357 | if (data_sect != NULL) | |
358 | data_offset = info->data_addr - bfd_section_vma (abfd, data_sect); | |
359 | ||
360 | sec->addr = bfd_section_vma (abfd, bfd_sect) + data_offset; | |
4d1eb6b4 JB |
361 | sec->addr += solib_aix_bss_data_overlap (abfd); |
362 | sec->endaddr = sec->addr + bfd_section_size (abfd, bfd_sect); | |
363 | } | |
364 | else | |
365 | { | |
366 | /* All other sections should not be relocated. */ | |
4d1eb6b4 JB |
367 | sec->addr = bfd_section_vma (abfd, bfd_sect); |
368 | sec->endaddr = sec->addr + bfd_section_size (abfd, bfd_sect); | |
369 | } | |
370 | } | |
371 | ||
372 | /* Implement the "free_so" target_so_ops method. */ | |
373 | ||
374 | static void | |
375 | solib_aix_free_so (struct so_list *so) | |
376 | { | |
6c401f72 SM |
377 | lm_info_aix *li = (lm_info_aix *) so->lm_info; |
378 | ||
4d1eb6b4 JB |
379 | if (solib_aix_debug) |
380 | fprintf_unfiltered (gdb_stdlog, "DEBUG: solib_aix_free_so (%s)\n", | |
381 | so->so_name); | |
6c401f72 SM |
382 | |
383 | delete li; | |
4d1eb6b4 JB |
384 | } |
385 | ||
386 | /* Implement the "clear_solib" target_so_ops method. */ | |
387 | ||
388 | static void | |
389 | solib_aix_clear_solib (void) | |
390 | { | |
391 | /* Nothing needed. */ | |
392 | } | |
393 | ||
394 | /* Compute and return the OBJFILE's section_offset array, using | |
395 | the associated loader info (INFO). | |
396 | ||
397 | The resulting array is computed on the heap and must be | |
398 | deallocated after use. */ | |
399 | ||
f709fabb | 400 | static gdb::unique_xmalloc_ptr<struct section_offsets> |
4d1eb6b4 | 401 | solib_aix_get_section_offsets (struct objfile *objfile, |
d0e449a1 | 402 | lm_info_aix *info) |
4d1eb6b4 | 403 | { |
4d1eb6b4 | 404 | bfd *abfd = objfile->obfd; |
4d1eb6b4 | 405 | |
f709fabb TT |
406 | gdb::unique_xmalloc_ptr<struct section_offsets> offsets |
407 | (XCNEWVEC (struct section_offsets, objfile->num_sections)); | |
4d1eb6b4 JB |
408 | |
409 | /* .text */ | |
410 | ||
411 | if (objfile->sect_index_text != -1) | |
412 | { | |
413 | struct bfd_section *sect | |
414 | = objfile->sections[objfile->sect_index_text].the_bfd_section; | |
415 | ||
416 | offsets->offsets[objfile->sect_index_text] | |
417 | = info->text_addr + sect->filepos - bfd_section_vma (abfd, sect); | |
418 | } | |
419 | ||
420 | /* .data */ | |
421 | ||
422 | if (objfile->sect_index_data != -1) | |
423 | { | |
424 | struct bfd_section *sect | |
425 | = objfile->sections[objfile->sect_index_data].the_bfd_section; | |
426 | ||
427 | offsets->offsets[objfile->sect_index_data] | |
428 | = info->data_addr - bfd_section_vma (abfd, sect); | |
429 | } | |
430 | ||
431 | /* .bss | |
432 | ||
433 | The offset of the .bss section should be identical to the offset | |
434 | of the .data section. If no .data section (which seems hard to | |
435 | believe it is possible), assume it is zero. */ | |
436 | ||
437 | if (objfile->sect_index_bss != -1 | |
438 | && objfile->sect_index_data != -1) | |
439 | { | |
440 | offsets->offsets[objfile->sect_index_bss] | |
441 | = (offsets->offsets[objfile->sect_index_data] | |
442 | + solib_aix_bss_data_overlap (abfd)); | |
443 | } | |
444 | ||
445 | /* All other sections should not need relocation. */ | |
446 | ||
447 | return offsets; | |
448 | } | |
449 | ||
450 | /* Implement the "solib_create_inferior_hook" target_so_ops method. */ | |
451 | ||
452 | static void | |
453 | solib_aix_solib_create_inferior_hook (int from_tty) | |
454 | { | |
455 | const char *warning_msg = "unable to relocate main executable"; | |
4d1eb6b4 JB |
456 | |
457 | /* We need to relocate the main executable... */ | |
458 | ||
a269fbf1 TT |
459 | gdb::optional<std::vector<lm_info_aix>> &library_list |
460 | = solib_aix_get_library_list (current_inferior (), warning_msg); | |
461 | if (!library_list.has_value ()) | |
4d1eb6b4 JB |
462 | return; /* Warning already printed. */ |
463 | ||
a269fbf1 | 464 | if (library_list->empty ()) |
4d1eb6b4 JB |
465 | { |
466 | warning (_("unable to relocate main executable (no info from loader)")); | |
467 | return; | |
468 | } | |
469 | ||
a269fbf1 | 470 | lm_info_aix &exec_info = (*library_list)[0]; |
4d1eb6b4 JB |
471 | if (symfile_objfile != NULL) |
472 | { | |
f709fabb | 473 | gdb::unique_xmalloc_ptr<struct section_offsets> offsets |
a269fbf1 | 474 | = solib_aix_get_section_offsets (symfile_objfile, &exec_info); |
4d1eb6b4 | 475 | |
f709fabb | 476 | objfile_relocate (symfile_objfile, offsets.get ()); |
4d1eb6b4 JB |
477 | } |
478 | } | |
479 | ||
4d1eb6b4 JB |
480 | /* Implement the "current_sos" target_so_ops method. */ |
481 | ||
482 | static struct so_list * | |
483 | solib_aix_current_sos (void) | |
484 | { | |
485 | struct so_list *start = NULL, *last = NULL; | |
4d1eb6b4 JB |
486 | int ix; |
487 | ||
a269fbf1 TT |
488 | gdb::optional<std::vector<lm_info_aix>> &library_list |
489 | = solib_aix_get_library_list (current_inferior (), NULL); | |
490 | if (!library_list.has_value ()) | |
4d1eb6b4 JB |
491 | return NULL; |
492 | ||
493 | /* Build a struct so_list for each entry on the list. | |
494 | We skip the first entry, since this is the entry corresponding | |
495 | to the main executable, not a shared library. */ | |
a269fbf1 | 496 | for (ix = 1; ix < library_list->size (); ix++) |
4d1eb6b4 | 497 | { |
41bf6aca | 498 | struct so_list *new_solib = XCNEW (struct so_list); |
6c401f72 | 499 | std::string so_name; |
4d1eb6b4 | 500 | |
a269fbf1 TT |
501 | lm_info_aix &info = (*library_list)[ix]; |
502 | if (info.member_name.empty ()) | |
4d1eb6b4 | 503 | { |
a269fbf1 | 504 | /* INFO.FILENAME is probably not an archive, but rather |
4d1eb6b4 JB |
505 | a shared object. Unusual, but it should be possible |
506 | to link a program against a shared object directory, | |
507 | without having to put it in an archive first. */ | |
a269fbf1 | 508 | so_name = info.filename; |
4d1eb6b4 JB |
509 | } |
510 | else | |
511 | { | |
512 | /* This is the usual case on AIX, where the shared object | |
513 | is a member of an archive. Create a synthetic so_name | |
514 | that follows the same convention as AIX's ldd tool | |
515 | (Eg: "/lib/libc.a(shr.o)"). */ | |
a269fbf1 TT |
516 | so_name = string_printf ("%s(%s)", info.filename.c_str (), |
517 | info.member_name.c_str ()); | |
4d1eb6b4 | 518 | } |
6c401f72 | 519 | strncpy (new_solib->so_original_name, so_name.c_str (), |
4d1eb6b4 JB |
520 | SO_NAME_MAX_PATH_SIZE - 1); |
521 | new_solib->so_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0'; | |
522 | memcpy (new_solib->so_name, new_solib->so_original_name, | |
523 | SO_NAME_MAX_PATH_SIZE); | |
a269fbf1 | 524 | new_solib->lm_info = new lm_info_aix (info); |
4d1eb6b4 JB |
525 | |
526 | /* Add it to the list. */ | |
527 | if (!start) | |
528 | last = start = new_solib; | |
529 | else | |
530 | { | |
531 | last->next = new_solib; | |
532 | last = new_solib; | |
533 | } | |
534 | } | |
535 | ||
536 | return start; | |
537 | } | |
538 | ||
539 | /* Implement the "open_symbol_file_object" target_so_ops method. */ | |
540 | ||
541 | static int | |
bf469271 | 542 | solib_aix_open_symbol_file_object (int from_tty) |
4d1eb6b4 JB |
543 | { |
544 | return 0; | |
545 | } | |
546 | ||
547 | /* Implement the "in_dynsym_resolve_code" target_so_ops method. */ | |
548 | ||
549 | static int | |
550 | solib_aix_in_dynsym_resolve_code (CORE_ADDR pc) | |
551 | { | |
552 | return 0; | |
553 | } | |
554 | ||
555 | /* Implement the "bfd_open" target_so_ops method. */ | |
556 | ||
192b62ce | 557 | static gdb_bfd_ref_ptr |
692d6f97 | 558 | solib_aix_bfd_open (const char *pathname) |
4d1eb6b4 JB |
559 | { |
560 | /* The pathname is actually a synthetic filename with the following | |
561 | form: "/path/to/sharedlib(member.o)" (double-quotes excluded). | |
562 | split this into archive name and member name. | |
563 | ||
564 | FIXME: This is a little hacky. Perhaps we should provide access | |
565 | to the solib's lm_info here? */ | |
566 | const int path_len = strlen (pathname); | |
692d6f97 | 567 | const char *sep; |
4d1eb6b4 | 568 | int filename_len; |
754c39c2 | 569 | int found_file; |
4d1eb6b4 JB |
570 | |
571 | if (pathname[path_len - 1] != ')') | |
572 | return solib_bfd_open (pathname); | |
573 | ||
574 | /* Search for the associated parens. */ | |
575 | sep = strrchr (pathname, '('); | |
576 | if (sep == NULL) | |
577 | { | |
578 | /* Should never happen, but recover as best as we can (trying | |
579 | to open pathname without decoding, possibly leading to | |
580 | a failure), rather than triggering an assert failure). */ | |
581 | warning (_("missing '(' in shared object pathname: %s"), pathname); | |
582 | return solib_bfd_open (pathname); | |
583 | } | |
584 | filename_len = sep - pathname; | |
585 | ||
192b62ce TT |
586 | std::string filename (string_printf ("%.*s", filename_len, pathname)); |
587 | std::string member_name (string_printf ("%.*s", path_len - filename_len - 2, | |
588 | sep + 1)); | |
4d1eb6b4 | 589 | |
754c39c2 UW |
590 | /* Calling solib_find makes certain that sysroot path is set properly |
591 | if program has a dependency on .a archive and sysroot is set via | |
592 | set sysroot command. */ | |
797bc1cb TT |
593 | gdb::unique_xmalloc_ptr<char> found_pathname |
594 | = solib_find (filename.c_str (), &found_file); | |
754c39c2 UW |
595 | if (found_pathname == NULL) |
596 | perror_with_name (pathname); | |
797bc1cb TT |
597 | gdb_bfd_ref_ptr archive_bfd (solib_bfd_fopen (found_pathname.get (), |
598 | found_file)); | |
4d1eb6b4 JB |
599 | if (archive_bfd == NULL) |
600 | { | |
601 | warning (_("Could not open `%s' as an executable file: %s"), | |
192b62ce | 602 | filename.c_str (), bfd_errmsg (bfd_get_error ())); |
4d1eb6b4 JB |
603 | return NULL; |
604 | } | |
605 | ||
192b62ce TT |
606 | if (bfd_check_format (archive_bfd.get (), bfd_object)) |
607 | return archive_bfd; | |
4d1eb6b4 | 608 | |
192b62ce | 609 | if (! bfd_check_format (archive_bfd.get (), bfd_archive)) |
4d1eb6b4 JB |
610 | { |
611 | warning (_("\"%s\": not in executable format: %s."), | |
192b62ce | 612 | filename.c_str (), bfd_errmsg (bfd_get_error ())); |
4d1eb6b4 JB |
613 | return NULL; |
614 | } | |
615 | ||
192b62ce TT |
616 | gdb_bfd_ref_ptr object_bfd |
617 | (gdb_bfd_openr_next_archived_file (archive_bfd.get (), NULL)); | |
4d1eb6b4 JB |
618 | while (object_bfd != NULL) |
619 | { | |
192b62ce | 620 | if (member_name == object_bfd->filename) |
4d1eb6b4 JB |
621 | break; |
622 | ||
192b62ce TT |
623 | object_bfd = gdb_bfd_openr_next_archived_file (archive_bfd.get (), |
624 | object_bfd.get ()); | |
4d1eb6b4 JB |
625 | } |
626 | ||
627 | if (object_bfd == NULL) | |
628 | { | |
192b62ce TT |
629 | warning (_("\"%s\": member \"%s\" missing."), filename.c_str (), |
630 | member_name.c_str ()); | |
4d1eb6b4 JB |
631 | return NULL; |
632 | } | |
633 | ||
192b62ce | 634 | if (! bfd_check_format (object_bfd.get (), bfd_object)) |
4d1eb6b4 JB |
635 | { |
636 | warning (_("%s(%s): not in object format: %s."), | |
192b62ce TT |
637 | filename.c_str (), member_name.c_str (), |
638 | bfd_errmsg (bfd_get_error ())); | |
4d1eb6b4 JB |
639 | return NULL; |
640 | } | |
641 | ||
754c39c2 UW |
642 | /* Override the returned bfd's name with the name returned from solib_find |
643 | along with appended parenthesized member name in order to allow commands | |
644 | listing all shared libraries to display. Otherwise, we would only be | |
645 | displaying the name of the archive member object. */ | |
192b62ce | 646 | xfree (bfd_get_filename (object_bfd.get ())); |
754c39c2 | 647 | object_bfd->filename = xstrprintf ("%s%s", |
192b62ce TT |
648 | bfd_get_filename (archive_bfd.get ()), |
649 | sep); | |
b030cf11 | 650 | |
4d1eb6b4 JB |
651 | return object_bfd; |
652 | } | |
653 | ||
654 | /* Return the obj_section corresponding to OBJFILE's data section, | |
655 | or NULL if not found. */ | |
656 | /* FIXME: Define in a more general location? */ | |
657 | ||
658 | static struct obj_section * | |
659 | data_obj_section_from_objfile (struct objfile *objfile) | |
660 | { | |
661 | struct obj_section *osect; | |
662 | ||
663 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
664 | if (strcmp (bfd_section_name (objfile->obfd, osect->the_bfd_section), | |
665 | ".data") == 0) | |
666 | return osect; | |
667 | ||
668 | return NULL; | |
669 | } | |
670 | ||
671 | /* Return the TOC value corresponding to the given PC address, | |
672 | or raise an error if the value could not be determined. */ | |
673 | ||
674 | CORE_ADDR | |
675 | solib_aix_get_toc_value (CORE_ADDR pc) | |
676 | { | |
677 | struct obj_section *pc_osect = find_pc_section (pc); | |
678 | struct obj_section *data_osect; | |
679 | CORE_ADDR result; | |
680 | ||
681 | if (pc_osect == NULL) | |
682 | error (_("unable to find TOC entry for pc %s " | |
683 | "(no section contains this PC)"), | |
684 | core_addr_to_string (pc)); | |
685 | ||
686 | data_osect = data_obj_section_from_objfile (pc_osect->objfile); | |
687 | if (data_osect == NULL) | |
688 | error (_("unable to find TOC entry for pc %s " | |
689 | "(%s has no data section)"), | |
4262abfb | 690 | core_addr_to_string (pc), objfile_name (pc_osect->objfile)); |
4d1eb6b4 JB |
691 | |
692 | result = (obj_section_addr (data_osect) | |
693 | + xcoff_get_toc_offset (pc_osect->objfile)); | |
694 | if (solib_aix_debug) | |
695 | fprintf_unfiltered (gdb_stdlog, | |
696 | "DEBUG: solib_aix_get_toc_value (pc=%s) -> %s\n", | |
697 | core_addr_to_string (pc), | |
698 | core_addr_to_string (result)); | |
699 | ||
700 | return result; | |
701 | } | |
702 | ||
703 | /* This module's normal_stop observer. */ | |
704 | ||
705 | static void | |
706 | solib_aix_normal_stop_observer (struct bpstats *unused_1, int unused_2) | |
707 | { | |
708 | struct solib_aix_inferior_data *data | |
709 | = get_solib_aix_inferior_data (current_inferior ()); | |
710 | ||
711 | /* The inferior execution has been resumed, and it just stopped | |
712 | again. This means that the list of shared libraries may have | |
713 | evolved. Reset our cached value. */ | |
a269fbf1 | 714 | data->library_list.reset (); |
4d1eb6b4 JB |
715 | } |
716 | ||
717 | /* Implements the "show debug aix-solib" command. */ | |
718 | ||
719 | static void | |
720 | show_solib_aix_debug (struct ui_file *file, int from_tty, | |
721 | struct cmd_list_element *c, const char *value) | |
722 | { | |
723 | fprintf_filtered (file, _("solib-aix debugging is %s.\n"), value); | |
724 | } | |
725 | ||
726 | /* The target_so_ops for AIX targets. */ | |
727 | struct target_so_ops solib_aix_so_ops; | |
728 | ||
4d1eb6b4 JB |
729 | void |
730 | _initialize_solib_aix (void) | |
731 | { | |
732 | solib_aix_so_ops.relocate_section_addresses | |
733 | = solib_aix_relocate_section_addresses; | |
734 | solib_aix_so_ops.free_so = solib_aix_free_so; | |
735 | solib_aix_so_ops.clear_solib = solib_aix_clear_solib; | |
736 | solib_aix_so_ops.solib_create_inferior_hook | |
737 | = solib_aix_solib_create_inferior_hook; | |
4d1eb6b4 JB |
738 | solib_aix_so_ops.current_sos = solib_aix_current_sos; |
739 | solib_aix_so_ops.open_symbol_file_object | |
740 | = solib_aix_open_symbol_file_object; | |
741 | solib_aix_so_ops.in_dynsym_resolve_code | |
742 | = solib_aix_in_dynsym_resolve_code; | |
743 | solib_aix_so_ops.bfd_open = solib_aix_bfd_open; | |
744 | ||
76727919 | 745 | gdb::observers::normal_stop.attach (solib_aix_normal_stop_observer); |
4d1eb6b4 JB |
746 | |
747 | /* Debug this file's internals. */ | |
748 | add_setshow_boolean_cmd ("aix-solib", class_maintenance, | |
749 | &solib_aix_debug, _("\ | |
750 | Control the debugging traces for the solib-aix module."), _("\ | |
751 | Show whether solib-aix debugging traces are enabled."), _("\ | |
752 | When on, solib-aix debugging traces are enabled."), | |
753 | NULL, | |
754 | show_solib_aix_debug, | |
755 | &setdebuglist, &showdebuglist); | |
756 | } |