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4a94e368 | 1 | /* Copyright (C) 2013-2022 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. */ | |
491144b5 | 33 | static bool solib_aix_debug; |
4d1eb6b4 | 34 | |
eef401dc SM |
35 | /* Print an "aix-solib" debug statement. */ |
36 | ||
37 | #define solib_aix_debug_printf(fmt, ...) \ | |
38 | debug_prefixed_printf_cond (solib_aix_debug, "aix-solib",fmt, ##__VA_ARGS__) | |
39 | ||
4d1eb6b4 JB |
40 | /* Our private data in struct so_list. */ |
41 | ||
d0e449a1 | 42 | struct lm_info_aix : public lm_info_base |
4d1eb6b4 JB |
43 | { |
44 | /* The name of the file mapped by the loader. Apart from the entry | |
45 | for the main executable, this is usually a shared library (which, | |
46 | on AIX, is an archive library file, created using the "ar" | |
47 | command). */ | |
6c401f72 | 48 | std::string filename; |
4d1eb6b4 JB |
49 | |
50 | /* The name of the shared object file with the actual dynamic | |
6c401f72 SM |
51 | loading dependency. This may be empty (Eg. main executable). */ |
52 | std::string member_name; | |
4d1eb6b4 JB |
53 | |
54 | /* The address in inferior memory where the text section got mapped. */ | |
6c401f72 | 55 | CORE_ADDR text_addr = 0; |
4d1eb6b4 JB |
56 | |
57 | /* The size of the text section, obtained via the loader data. */ | |
6c401f72 | 58 | ULONGEST text_size = 0; |
4d1eb6b4 JB |
59 | |
60 | /* The address in inferior memory where the data section got mapped. */ | |
6c401f72 | 61 | CORE_ADDR data_addr = 0; |
4d1eb6b4 JB |
62 | |
63 | /* The size of the data section, obtained via the loader data. */ | |
6c401f72 | 64 | ULONGEST data_size = 0; |
4d1eb6b4 JB |
65 | }; |
66 | ||
4d1eb6b4 JB |
67 | /* This module's per-inferior data. */ |
68 | ||
69 | struct solib_aix_inferior_data | |
70 | { | |
a269fbf1 | 71 | /* The list of shared libraries. |
4d1eb6b4 JB |
72 | |
73 | Note that the first element of this list is always the main | |
74 | executable, which is not technically a shared library. But | |
75 | we need that information to perform its relocation, and | |
76 | the same principles applied to shared libraries also apply | |
77 | to the main executable. So it's simpler to keep it as part | |
78 | of this list. */ | |
a269fbf1 | 79 | gdb::optional<std::vector<lm_info_aix>> library_list; |
4d1eb6b4 JB |
80 | }; |
81 | ||
82 | /* Key to our per-inferior data. */ | |
08b8a139 TT |
83 | static const registry<inferior>::key<solib_aix_inferior_data> |
84 | solib_aix_inferior_data_handle; | |
4d1eb6b4 JB |
85 | |
86 | /* Return this module's data for the given inferior. | |
87 | If none is found, add a zero'ed one now. */ | |
88 | ||
89 | static struct solib_aix_inferior_data * | |
90 | get_solib_aix_inferior_data (struct inferior *inf) | |
91 | { | |
92 | struct solib_aix_inferior_data *data; | |
93 | ||
a269fbf1 | 94 | data = solib_aix_inferior_data_handle.get (inf); |
4d1eb6b4 | 95 | if (data == NULL) |
a269fbf1 | 96 | data = solib_aix_inferior_data_handle.emplace (inf); |
4d1eb6b4 JB |
97 | |
98 | return data; | |
99 | } | |
100 | ||
101 | #if !defined(HAVE_LIBEXPAT) | |
102 | ||
103 | /* Dummy implementation if XML support is not compiled in. */ | |
104 | ||
a269fbf1 | 105 | static gdb::optional<std::vector<lm_info_aix>> |
4d1eb6b4 JB |
106 | solib_aix_parse_libraries (const char *library) |
107 | { | |
108 | static int have_warned; | |
109 | ||
110 | if (!have_warned) | |
111 | { | |
112 | have_warned = 1; | |
113 | warning (_("Can not parse XML library list; XML support was disabled " | |
dda83cd7 | 114 | "at compile time")); |
4d1eb6b4 JB |
115 | } |
116 | ||
a269fbf1 | 117 | return {}; |
814a3ff7 JB |
118 | } |
119 | ||
4d1eb6b4 JB |
120 | #else /* HAVE_LIBEXPAT */ |
121 | ||
122 | #include "xml-support.h" | |
123 | ||
124 | /* Handle the start of a <library> element. */ | |
125 | ||
126 | static void | |
127 | library_list_start_library (struct gdb_xml_parser *parser, | |
128 | const struct gdb_xml_element *element, | |
129 | void *user_data, | |
4d0fdd9b | 130 | std::vector<gdb_xml_value> &attributes) |
4d1eb6b4 | 131 | { |
a269fbf1 TT |
132 | std::vector<lm_info_aix> *list = (std::vector<lm_info_aix> *) user_data; |
133 | lm_info_aix item; | |
4d1eb6b4 JB |
134 | struct gdb_xml_value *attr; |
135 | ||
136 | attr = xml_find_attribute (attributes, "name"); | |
a269fbf1 | 137 | item.filename = (const char *) attr->value.get (); |
4d1eb6b4 JB |
138 | |
139 | attr = xml_find_attribute (attributes, "member"); | |
140 | if (attr != NULL) | |
a269fbf1 | 141 | item.member_name = (const char *) attr->value.get (); |
4d1eb6b4 JB |
142 | |
143 | attr = xml_find_attribute (attributes, "text_addr"); | |
a269fbf1 | 144 | item.text_addr = * (ULONGEST *) attr->value.get (); |
4d1eb6b4 JB |
145 | |
146 | attr = xml_find_attribute (attributes, "text_size"); | |
a269fbf1 | 147 | item.text_size = * (ULONGEST *) attr->value.get (); |
4d1eb6b4 JB |
148 | |
149 | attr = xml_find_attribute (attributes, "data_addr"); | |
a269fbf1 | 150 | item.data_addr = * (ULONGEST *) attr->value.get (); |
4d1eb6b4 JB |
151 | |
152 | attr = xml_find_attribute (attributes, "data_size"); | |
a269fbf1 | 153 | item.data_size = * (ULONGEST *) attr->value.get (); |
4d1eb6b4 | 154 | |
a269fbf1 | 155 | list->push_back (std::move (item)); |
4d1eb6b4 JB |
156 | } |
157 | ||
8c56e112 | 158 | /* Handle the start of a <library-list-aix> element. */ |
4d1eb6b4 JB |
159 | |
160 | static void | |
161 | library_list_start_list (struct gdb_xml_parser *parser, | |
dda83cd7 SM |
162 | const struct gdb_xml_element *element, |
163 | void *user_data, | |
4d0fdd9b | 164 | std::vector<gdb_xml_value> &attributes) |
4d1eb6b4 | 165 | { |
4d0fdd9b SM |
166 | char *version |
167 | = (char *) xml_find_attribute (attributes, "version")->value.get (); | |
4d1eb6b4 JB |
168 | |
169 | if (strcmp (version, "1.0") != 0) | |
170 | gdb_xml_error (parser, | |
dda83cd7 SM |
171 | _("Library list has unsupported version \"%s\""), |
172 | version); | |
4d1eb6b4 JB |
173 | } |
174 | ||
4d1eb6b4 | 175 | /* The allowed elements and attributes for an AIX library list |
8c56e112 | 176 | described in XML format. The root element is a <library-list-aix>. */ |
4d1eb6b4 JB |
177 | |
178 | static const struct gdb_xml_attribute library_attributes[] = | |
179 | { | |
180 | { "name", GDB_XML_AF_NONE, NULL, NULL }, | |
181 | { "member", GDB_XML_AF_OPTIONAL, NULL, NULL }, | |
182 | { "text_addr", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL }, | |
183 | { "text_size", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL }, | |
184 | { "data_addr", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL }, | |
185 | { "data_size", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL }, | |
186 | { NULL, GDB_XML_AF_NONE, NULL, NULL } | |
187 | }; | |
188 | ||
189 | static const struct gdb_xml_element library_list_children[] = | |
190 | { | |
191 | { "library", library_attributes, NULL, | |
192 | GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL, | |
193 | library_list_start_library, NULL}, | |
194 | { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } | |
195 | }; | |
196 | ||
197 | static const struct gdb_xml_attribute library_list_attributes[] = | |
198 | { | |
199 | { "version", GDB_XML_AF_NONE, NULL, NULL }, | |
200 | { NULL, GDB_XML_AF_NONE, NULL, NULL } | |
201 | }; | |
202 | ||
203 | static const struct gdb_xml_element library_list_elements[] = | |
204 | { | |
8c56e112 | 205 | { "library-list-aix", library_list_attributes, library_list_children, |
4d1eb6b4 JB |
206 | GDB_XML_EF_NONE, library_list_start_list, NULL }, |
207 | { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } | |
208 | }; | |
209 | ||
210 | /* Parse LIBRARY, a string containing the loader info in XML format, | |
a269fbf1 | 211 | and return a vector of lm_info_aix objects. |
4d1eb6b4 | 212 | |
a269fbf1 | 213 | Return an empty option if the parsing failed. */ |
4d1eb6b4 | 214 | |
a269fbf1 | 215 | static gdb::optional<std::vector<lm_info_aix>> |
4d1eb6b4 JB |
216 | solib_aix_parse_libraries (const char *library) |
217 | { | |
a269fbf1 | 218 | std::vector<lm_info_aix> result; |
4d1eb6b4 JB |
219 | |
220 | if (gdb_xml_parse_quick (_("aix library list"), "library-list-aix.dtd", | |
a269fbf1 TT |
221 | library_list_elements, library, &result) == 0) |
222 | return result; | |
4d1eb6b4 | 223 | |
a269fbf1 | 224 | return {}; |
4d1eb6b4 JB |
225 | } |
226 | ||
227 | #endif /* HAVE_LIBEXPAT */ | |
228 | ||
a269fbf1 TT |
229 | /* Return the loader info for the given inferior (INF), or an empty |
230 | option if the list could not be computed. | |
4d1eb6b4 JB |
231 | |
232 | Cache the result in per-inferior data, so as to avoid recomputing it | |
233 | each time this function is called. | |
234 | ||
235 | If an error occurs while computing this list, and WARNING_MSG | |
236 | is not NULL, then print a warning including WARNING_MSG and | |
237 | a description of the error. */ | |
238 | ||
a269fbf1 | 239 | static gdb::optional<std::vector<lm_info_aix>> & |
4d1eb6b4 JB |
240 | solib_aix_get_library_list (struct inferior *inf, const char *warning_msg) |
241 | { | |
242 | struct solib_aix_inferior_data *data; | |
4d1eb6b4 JB |
243 | |
244 | /* If already computed, return the cached value. */ | |
245 | data = get_solib_aix_inferior_data (inf); | |
a269fbf1 | 246 | if (data->library_list.has_value ()) |
4d1eb6b4 JB |
247 | return data->library_list; |
248 | ||
9018be22 | 249 | gdb::optional<gdb::char_vector> library_document |
328d42d8 SM |
250 | = target_read_stralloc (current_inferior ()->top_target (), |
251 | TARGET_OBJECT_LIBRARIES_AIX, | |
b7b030ad | 252 | NULL); |
9018be22 | 253 | if (!library_document && warning_msg != NULL) |
4d1eb6b4 | 254 | { |
ff99b71b | 255 | warning (_("%s (failed to read TARGET_OBJECT_LIBRARIES_AIX)"), |
4d1eb6b4 | 256 | warning_msg); |
a269fbf1 | 257 | return data->library_list; |
4d1eb6b4 | 258 | } |
4d1eb6b4 | 259 | |
eef401dc SM |
260 | solib_aix_debug_printf ("TARGET_OBJECT_LIBRARIES_AIX = %s", |
261 | library_document->data ()); | |
4d1eb6b4 | 262 | |
9018be22 | 263 | data->library_list = solib_aix_parse_libraries (library_document->data ()); |
a269fbf1 TT |
264 | if (!data->library_list.has_value () && warning_msg != NULL) |
265 | warning (_("%s (missing XML support?)"), warning_msg); | |
4d1eb6b4 | 266 | |
4d1eb6b4 JB |
267 | return data->library_list; |
268 | } | |
269 | ||
270 | /* If the .bss section's VMA is set to an address located before | |
271 | the end of the .data section, causing the two sections to overlap, | |
272 | return the overlap in bytes. Otherwise, return zero. | |
273 | ||
274 | Motivation: | |
275 | ||
276 | The GNU linker sometimes sets the start address of the .bss session | |
277 | before the end of the .data section, making the 2 sections overlap. | |
278 | The loader appears to handle this situation gracefully, by simply | |
279 | loading the bss section right after the end of the .data section. | |
280 | ||
281 | This means that the .data and the .bss sections are sometimes | |
282 | no longer relocated by the same amount. The problem is that | |
283 | the ldinfo data does not contain any information regarding | |
284 | the relocation of the .bss section, assuming that it would be | |
285 | identical to the information provided for the .data section | |
286 | (this is what would normally happen if the program was linked | |
287 | correctly). | |
288 | ||
289 | GDB therefore needs to detect those cases, and make the corresponding | |
290 | adjustment to the .bss section offset computed from the ldinfo data | |
291 | when necessary. This function returns the adjustment amount (or | |
292 | zero when no adjustment is needed). */ | |
293 | ||
294 | static CORE_ADDR | |
295 | solib_aix_bss_data_overlap (bfd *abfd) | |
296 | { | |
297 | struct bfd_section *data_sect, *bss_sect; | |
298 | ||
299 | data_sect = bfd_get_section_by_name (abfd, ".data"); | |
300 | if (data_sect == NULL) | |
301 | return 0; /* No overlap possible. */ | |
302 | ||
303 | bss_sect = bfd_get_section_by_name (abfd, ".bss"); | |
304 | if (bss_sect == NULL) | |
305 | return 0; /* No overlap possible. */ | |
306 | ||
307 | /* Assume the problem only occurs with linkers that place the .bss | |
308 | section after the .data section (the problem has only been | |
309 | observed when using the GNU linker, and the default linker | |
310 | script always places the .data and .bss sections in that order). */ | |
fd361982 | 311 | if (bfd_section_vma (bss_sect) < bfd_section_vma (data_sect)) |
4d1eb6b4 JB |
312 | return 0; |
313 | ||
fd361982 AM |
314 | if (bfd_section_vma (bss_sect) |
315 | < bfd_section_vma (data_sect) + bfd_section_size (data_sect)) | |
316 | return (bfd_section_vma (data_sect) + bfd_section_size (data_sect) | |
317 | - bfd_section_vma (bss_sect)); | |
4d1eb6b4 JB |
318 | |
319 | return 0; | |
320 | } | |
321 | ||
322 | /* Implement the "relocate_section_addresses" target_so_ops method. */ | |
323 | ||
324 | static void | |
325 | solib_aix_relocate_section_addresses (struct so_list *so, | |
326 | struct target_section *sec) | |
327 | { | |
4d1eb6b4 | 328 | struct bfd_section *bfd_sect = sec->the_bfd_section; |
57e6060e | 329 | bfd *abfd = bfd_sect->owner; |
fd361982 | 330 | const char *section_name = bfd_section_name (bfd_sect); |
d0e449a1 | 331 | lm_info_aix *info = (lm_info_aix *) so->lm_info; |
4d1eb6b4 JB |
332 | |
333 | if (strcmp (section_name, ".text") == 0) | |
334 | { | |
335 | sec->addr = info->text_addr; | |
336 | sec->endaddr = sec->addr + info->text_size; | |
337 | ||
338 | /* The text address given to us by the loader contains | |
339 | XCOFF headers, so we need to adjust by this much. */ | |
340 | sec->addr += bfd_sect->filepos; | |
341 | } | |
342 | else if (strcmp (section_name, ".data") == 0) | |
343 | { | |
344 | sec->addr = info->data_addr; | |
345 | sec->endaddr = sec->addr + info->data_size; | |
346 | } | |
347 | else if (strcmp (section_name, ".bss") == 0) | |
348 | { | |
060cfbef JB |
349 | /* The information provided by the loader does not include |
350 | the address of the .bss section, but we know that it gets | |
351 | relocated by the same offset as the .data section. So, | |
352 | compute the relocation offset for the .data section, and | |
353 | apply it to the .bss section as well. If the .data section | |
354 | is not defined (which seems highly unlikely), do our best | |
355 | by assuming no relocation. */ | |
356 | struct bfd_section *data_sect | |
357 | = bfd_get_section_by_name (abfd, ".data"); | |
358 | CORE_ADDR data_offset = 0; | |
359 | ||
360 | if (data_sect != NULL) | |
fd361982 | 361 | data_offset = info->data_addr - bfd_section_vma (data_sect); |
060cfbef | 362 | |
fd361982 | 363 | sec->addr = bfd_section_vma (bfd_sect) + data_offset; |
4d1eb6b4 | 364 | sec->addr += solib_aix_bss_data_overlap (abfd); |
fd361982 | 365 | sec->endaddr = sec->addr + bfd_section_size (bfd_sect); |
4d1eb6b4 JB |
366 | } |
367 | else | |
368 | { | |
369 | /* All other sections should not be relocated. */ | |
fd361982 AM |
370 | sec->addr = bfd_section_vma (bfd_sect); |
371 | sec->endaddr = sec->addr + bfd_section_size (bfd_sect); | |
4d1eb6b4 JB |
372 | } |
373 | } | |
374 | ||
375 | /* Implement the "free_so" target_so_ops method. */ | |
376 | ||
377 | static void | |
378 | solib_aix_free_so (struct so_list *so) | |
379 | { | |
6c401f72 SM |
380 | lm_info_aix *li = (lm_info_aix *) so->lm_info; |
381 | ||
eef401dc | 382 | solib_aix_debug_printf ("%s", so->so_name); |
6c401f72 SM |
383 | |
384 | delete li; | |
4d1eb6b4 JB |
385 | } |
386 | ||
387 | /* Implement the "clear_solib" target_so_ops method. */ | |
388 | ||
389 | static void | |
390 | solib_aix_clear_solib (void) | |
391 | { | |
392 | /* Nothing needed. */ | |
393 | } | |
394 | ||
395 | /* Compute and return the OBJFILE's section_offset array, using | |
6a053cb1 | 396 | the associated loader info (INFO). */ |
4d1eb6b4 | 397 | |
6a053cb1 | 398 | static section_offsets |
4d1eb6b4 | 399 | solib_aix_get_section_offsets (struct objfile *objfile, |
d0e449a1 | 400 | lm_info_aix *info) |
4d1eb6b4 | 401 | { |
4d1eb6b4 | 402 | bfd *abfd = objfile->obfd; |
4d1eb6b4 | 403 | |
6a053cb1 | 404 | section_offsets offsets (objfile->section_offsets.size ()); |
4d1eb6b4 JB |
405 | |
406 | /* .text */ | |
407 | ||
408 | if (objfile->sect_index_text != -1) | |
409 | { | |
410 | struct bfd_section *sect | |
411 | = objfile->sections[objfile->sect_index_text].the_bfd_section; | |
412 | ||
6a053cb1 | 413 | offsets[objfile->sect_index_text] |
fd361982 | 414 | = info->text_addr + sect->filepos - bfd_section_vma (sect); |
4d1eb6b4 JB |
415 | } |
416 | ||
417 | /* .data */ | |
418 | ||
419 | if (objfile->sect_index_data != -1) | |
420 | { | |
421 | struct bfd_section *sect | |
422 | = objfile->sections[objfile->sect_index_data].the_bfd_section; | |
423 | ||
6a053cb1 | 424 | offsets[objfile->sect_index_data] |
fd361982 | 425 | = info->data_addr - bfd_section_vma (sect); |
4d1eb6b4 JB |
426 | } |
427 | ||
428 | /* .bss | |
429 | ||
430 | The offset of the .bss section should be identical to the offset | |
431 | of the .data section. If no .data section (which seems hard to | |
432 | believe it is possible), assume it is zero. */ | |
433 | ||
434 | if (objfile->sect_index_bss != -1 | |
435 | && objfile->sect_index_data != -1) | |
436 | { | |
6a053cb1 TT |
437 | offsets[objfile->sect_index_bss] |
438 | = (offsets[objfile->sect_index_data] | |
4d1eb6b4 JB |
439 | + solib_aix_bss_data_overlap (abfd)); |
440 | } | |
441 | ||
442 | /* All other sections should not need relocation. */ | |
443 | ||
444 | return offsets; | |
445 | } | |
446 | ||
447 | /* Implement the "solib_create_inferior_hook" target_so_ops method. */ | |
448 | ||
449 | static void | |
450 | solib_aix_solib_create_inferior_hook (int from_tty) | |
451 | { | |
452 | const char *warning_msg = "unable to relocate main executable"; | |
4d1eb6b4 JB |
453 | |
454 | /* We need to relocate the main executable... */ | |
455 | ||
a269fbf1 TT |
456 | gdb::optional<std::vector<lm_info_aix>> &library_list |
457 | = solib_aix_get_library_list (current_inferior (), warning_msg); | |
458 | if (!library_list.has_value ()) | |
4d1eb6b4 JB |
459 | return; /* Warning already printed. */ |
460 | ||
a269fbf1 | 461 | if (library_list->empty ()) |
4d1eb6b4 JB |
462 | { |
463 | warning (_("unable to relocate main executable (no info from loader)")); | |
464 | return; | |
465 | } | |
466 | ||
a269fbf1 | 467 | lm_info_aix &exec_info = (*library_list)[0]; |
a42d7dd8 | 468 | if (current_program_space->symfile_object_file != NULL) |
4d1eb6b4 | 469 | { |
a42d7dd8 TT |
470 | objfile *objf = current_program_space->symfile_object_file; |
471 | section_offsets offsets = solib_aix_get_section_offsets (objf, | |
472 | &exec_info); | |
4d1eb6b4 | 473 | |
a42d7dd8 | 474 | objfile_relocate (objf, offsets); |
4d1eb6b4 JB |
475 | } |
476 | } | |
477 | ||
4d1eb6b4 JB |
478 | /* Implement the "current_sos" target_so_ops method. */ |
479 | ||
480 | static struct so_list * | |
481 | solib_aix_current_sos (void) | |
482 | { | |
483 | struct so_list *start = NULL, *last = NULL; | |
4d1eb6b4 JB |
484 | int ix; |
485 | ||
a269fbf1 TT |
486 | gdb::optional<std::vector<lm_info_aix>> &library_list |
487 | = solib_aix_get_library_list (current_inferior (), NULL); | |
488 | if (!library_list.has_value ()) | |
4d1eb6b4 JB |
489 | return NULL; |
490 | ||
491 | /* Build a struct so_list for each entry on the list. | |
492 | We skip the first entry, since this is the entry corresponding | |
493 | to the main executable, not a shared library. */ | |
a269fbf1 | 494 | for (ix = 1; ix < library_list->size (); ix++) |
4d1eb6b4 | 495 | { |
41bf6aca | 496 | struct so_list *new_solib = XCNEW (struct so_list); |
6c401f72 | 497 | std::string so_name; |
4d1eb6b4 | 498 | |
a269fbf1 TT |
499 | lm_info_aix &info = (*library_list)[ix]; |
500 | if (info.member_name.empty ()) | |
4d1eb6b4 | 501 | { |
a269fbf1 | 502 | /* INFO.FILENAME is probably not an archive, but rather |
4d1eb6b4 JB |
503 | a shared object. Unusual, but it should be possible |
504 | to link a program against a shared object directory, | |
505 | without having to put it in an archive first. */ | |
a269fbf1 | 506 | so_name = info.filename; |
4d1eb6b4 JB |
507 | } |
508 | else | |
509 | { | |
510 | /* This is the usual case on AIX, where the shared object | |
511 | is a member of an archive. Create a synthetic so_name | |
512 | that follows the same convention as AIX's ldd tool | |
513 | (Eg: "/lib/libc.a(shr.o)"). */ | |
a269fbf1 TT |
514 | so_name = string_printf ("%s(%s)", info.filename.c_str (), |
515 | info.member_name.c_str ()); | |
4d1eb6b4 | 516 | } |
6c401f72 | 517 | strncpy (new_solib->so_original_name, so_name.c_str (), |
4d1eb6b4 JB |
518 | SO_NAME_MAX_PATH_SIZE - 1); |
519 | new_solib->so_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0'; | |
520 | memcpy (new_solib->so_name, new_solib->so_original_name, | |
521 | SO_NAME_MAX_PATH_SIZE); | |
a269fbf1 | 522 | new_solib->lm_info = new lm_info_aix (info); |
4d1eb6b4 JB |
523 | |
524 | /* Add it to the list. */ | |
525 | if (!start) | |
dda83cd7 | 526 | last = start = new_solib; |
4d1eb6b4 | 527 | else |
dda83cd7 SM |
528 | { |
529 | last->next = new_solib; | |
530 | last = new_solib; | |
531 | } | |
4d1eb6b4 JB |
532 | } |
533 | ||
534 | return start; | |
535 | } | |
536 | ||
537 | /* Implement the "open_symbol_file_object" target_so_ops method. */ | |
538 | ||
539 | static int | |
bf469271 | 540 | solib_aix_open_symbol_file_object (int from_tty) |
4d1eb6b4 JB |
541 | { |
542 | return 0; | |
543 | } | |
544 | ||
545 | /* Implement the "in_dynsym_resolve_code" target_so_ops method. */ | |
546 | ||
547 | static int | |
548 | solib_aix_in_dynsym_resolve_code (CORE_ADDR pc) | |
549 | { | |
550 | return 0; | |
551 | } | |
552 | ||
553 | /* Implement the "bfd_open" target_so_ops method. */ | |
554 | ||
192b62ce | 555 | static gdb_bfd_ref_ptr |
692d6f97 | 556 | solib_aix_bfd_open (const char *pathname) |
4d1eb6b4 JB |
557 | { |
558 | /* The pathname is actually a synthetic filename with the following | |
559 | form: "/path/to/sharedlib(member.o)" (double-quotes excluded). | |
560 | split this into archive name and member name. | |
561 | ||
562 | FIXME: This is a little hacky. Perhaps we should provide access | |
563 | to the solib's lm_info here? */ | |
564 | const int path_len = strlen (pathname); | |
692d6f97 | 565 | const char *sep; |
4d1eb6b4 | 566 | int filename_len; |
754c39c2 | 567 | int found_file; |
4d1eb6b4 JB |
568 | |
569 | if (pathname[path_len - 1] != ')') | |
570 | return solib_bfd_open (pathname); | |
571 | ||
572 | /* Search for the associated parens. */ | |
573 | sep = strrchr (pathname, '('); | |
574 | if (sep == NULL) | |
575 | { | |
576 | /* Should never happen, but recover as best as we can (trying | |
577 | to open pathname without decoding, possibly leading to | |
578 | a failure), rather than triggering an assert failure). */ | |
579 | warning (_("missing '(' in shared object pathname: %s"), pathname); | |
580 | return solib_bfd_open (pathname); | |
581 | } | |
582 | filename_len = sep - pathname; | |
583 | ||
192b62ce TT |
584 | std::string filename (string_printf ("%.*s", filename_len, pathname)); |
585 | std::string member_name (string_printf ("%.*s", path_len - filename_len - 2, | |
586 | sep + 1)); | |
4d1eb6b4 | 587 | |
754c39c2 UW |
588 | /* Calling solib_find makes certain that sysroot path is set properly |
589 | if program has a dependency on .a archive and sysroot is set via | |
590 | set sysroot command. */ | |
797bc1cb TT |
591 | gdb::unique_xmalloc_ptr<char> found_pathname |
592 | = solib_find (filename.c_str (), &found_file); | |
754c39c2 UW |
593 | if (found_pathname == NULL) |
594 | perror_with_name (pathname); | |
797bc1cb TT |
595 | gdb_bfd_ref_ptr archive_bfd (solib_bfd_fopen (found_pathname.get (), |
596 | found_file)); | |
4d1eb6b4 JB |
597 | if (archive_bfd == NULL) |
598 | { | |
599 | warning (_("Could not open `%s' as an executable file: %s"), | |
192b62ce | 600 | filename.c_str (), bfd_errmsg (bfd_get_error ())); |
4d1eb6b4 JB |
601 | return NULL; |
602 | } | |
603 | ||
192b62ce TT |
604 | if (bfd_check_format (archive_bfd.get (), bfd_object)) |
605 | return archive_bfd; | |
4d1eb6b4 | 606 | |
192b62ce | 607 | if (! bfd_check_format (archive_bfd.get (), bfd_archive)) |
4d1eb6b4 JB |
608 | { |
609 | warning (_("\"%s\": not in executable format: %s."), | |
192b62ce | 610 | filename.c_str (), bfd_errmsg (bfd_get_error ())); |
4d1eb6b4 JB |
611 | return NULL; |
612 | } | |
613 | ||
192b62ce TT |
614 | gdb_bfd_ref_ptr object_bfd |
615 | (gdb_bfd_openr_next_archived_file (archive_bfd.get (), NULL)); | |
4d1eb6b4 JB |
616 | while (object_bfd != NULL) |
617 | { | |
c7e97679 | 618 | if (member_name == bfd_get_filename (object_bfd.get ())) |
4d1eb6b4 JB |
619 | break; |
620 | ||
192b62ce TT |
621 | object_bfd = gdb_bfd_openr_next_archived_file (archive_bfd.get (), |
622 | object_bfd.get ()); | |
4d1eb6b4 JB |
623 | } |
624 | ||
625 | if (object_bfd == NULL) | |
626 | { | |
192b62ce TT |
627 | warning (_("\"%s\": member \"%s\" missing."), filename.c_str (), |
628 | member_name.c_str ()); | |
4d1eb6b4 JB |
629 | return NULL; |
630 | } | |
631 | ||
192b62ce | 632 | if (! bfd_check_format (object_bfd.get (), bfd_object)) |
4d1eb6b4 JB |
633 | { |
634 | warning (_("%s(%s): not in object format: %s."), | |
192b62ce TT |
635 | filename.c_str (), member_name.c_str (), |
636 | bfd_errmsg (bfd_get_error ())); | |
4d1eb6b4 JB |
637 | return NULL; |
638 | } | |
639 | ||
754c39c2 UW |
640 | /* Override the returned bfd's name with the name returned from solib_find |
641 | along with appended parenthesized member name in order to allow commands | |
642 | listing all shared libraries to display. Otherwise, we would only be | |
643 | displaying the name of the archive member object. */ | |
7b958a48 AM |
644 | std::string fname = string_printf ("%s%s", |
645 | bfd_get_filename (archive_bfd.get ()), | |
646 | sep); | |
647 | bfd_set_filename (object_bfd.get (), fname.c_str ()); | |
b030cf11 | 648 | |
4d1eb6b4 JB |
649 | return object_bfd; |
650 | } | |
651 | ||
652 | /* Return the obj_section corresponding to OBJFILE's data section, | |
653 | or NULL if not found. */ | |
654 | /* FIXME: Define in a more general location? */ | |
655 | ||
656 | static struct obj_section * | |
657 | data_obj_section_from_objfile (struct objfile *objfile) | |
658 | { | |
659 | struct obj_section *osect; | |
660 | ||
661 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
fd361982 | 662 | if (strcmp (bfd_section_name (osect->the_bfd_section), ".data") == 0) |
4d1eb6b4 JB |
663 | return osect; |
664 | ||
665 | return NULL; | |
666 | } | |
667 | ||
668 | /* Return the TOC value corresponding to the given PC address, | |
669 | or raise an error if the value could not be determined. */ | |
670 | ||
671 | CORE_ADDR | |
672 | solib_aix_get_toc_value (CORE_ADDR pc) | |
673 | { | |
674 | struct obj_section *pc_osect = find_pc_section (pc); | |
675 | struct obj_section *data_osect; | |
676 | CORE_ADDR result; | |
677 | ||
678 | if (pc_osect == NULL) | |
679 | error (_("unable to find TOC entry for pc %s " | |
680 | "(no section contains this PC)"), | |
681 | core_addr_to_string (pc)); | |
682 | ||
683 | data_osect = data_obj_section_from_objfile (pc_osect->objfile); | |
684 | if (data_osect == NULL) | |
685 | error (_("unable to find TOC entry for pc %s " | |
686 | "(%s has no data section)"), | |
4262abfb | 687 | core_addr_to_string (pc), objfile_name (pc_osect->objfile)); |
4d1eb6b4 | 688 | |
0c1bcd23 | 689 | result = data_osect->addr () + xcoff_get_toc_offset (pc_osect->objfile); |
eef401dc SM |
690 | |
691 | solib_aix_debug_printf ("pc=%s -> %s", core_addr_to_string (pc), | |
692 | core_addr_to_string (result)); | |
4d1eb6b4 JB |
693 | |
694 | return result; | |
695 | } | |
696 | ||
697 | /* This module's normal_stop observer. */ | |
698 | ||
699 | static void | |
313f3b21 | 700 | solib_aix_normal_stop_observer (struct bpstat *unused_1, int unused_2) |
4d1eb6b4 JB |
701 | { |
702 | struct solib_aix_inferior_data *data | |
703 | = get_solib_aix_inferior_data (current_inferior ()); | |
704 | ||
705 | /* The inferior execution has been resumed, and it just stopped | |
706 | again. This means that the list of shared libraries may have | |
707 | evolved. Reset our cached value. */ | |
a269fbf1 | 708 | data->library_list.reset (); |
4d1eb6b4 JB |
709 | } |
710 | ||
711 | /* Implements the "show debug aix-solib" command. */ | |
712 | ||
713 | static void | |
714 | show_solib_aix_debug (struct ui_file *file, int from_tty, | |
715 | struct cmd_list_element *c, const char *value) | |
716 | { | |
6cb06a8c | 717 | gdb_printf (file, _("solib-aix debugging is %s.\n"), value); |
4d1eb6b4 JB |
718 | } |
719 | ||
720 | /* The target_so_ops for AIX targets. */ | |
721 | struct target_so_ops solib_aix_so_ops; | |
722 | ||
6c265988 | 723 | void _initialize_solib_aix (); |
4d1eb6b4 | 724 | void |
6c265988 | 725 | _initialize_solib_aix () |
4d1eb6b4 JB |
726 | { |
727 | solib_aix_so_ops.relocate_section_addresses | |
728 | = solib_aix_relocate_section_addresses; | |
729 | solib_aix_so_ops.free_so = solib_aix_free_so; | |
730 | solib_aix_so_ops.clear_solib = solib_aix_clear_solib; | |
731 | solib_aix_so_ops.solib_create_inferior_hook | |
732 | = solib_aix_solib_create_inferior_hook; | |
4d1eb6b4 JB |
733 | solib_aix_so_ops.current_sos = solib_aix_current_sos; |
734 | solib_aix_so_ops.open_symbol_file_object | |
735 | = solib_aix_open_symbol_file_object; | |
736 | solib_aix_so_ops.in_dynsym_resolve_code | |
737 | = solib_aix_in_dynsym_resolve_code; | |
738 | solib_aix_so_ops.bfd_open = solib_aix_bfd_open; | |
739 | ||
c90e7d63 SM |
740 | gdb::observers::normal_stop.attach (solib_aix_normal_stop_observer, |
741 | "solib-aix"); | |
4d1eb6b4 JB |
742 | |
743 | /* Debug this file's internals. */ | |
744 | add_setshow_boolean_cmd ("aix-solib", class_maintenance, | |
745 | &solib_aix_debug, _("\ | |
746 | Control the debugging traces for the solib-aix module."), _("\ | |
747 | Show whether solib-aix debugging traces are enabled."), _("\ | |
748 | When on, solib-aix debugging traces are enabled."), | |
dda83cd7 SM |
749 | NULL, |
750 | show_solib_aix_debug, | |
751 | &setdebuglist, &showdebuglist); | |
4d1eb6b4 | 752 | } |