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3666a048 | 1 | /* Copyright (C) 2013-2021 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. */ | |
a269fbf1 | 83 | static inferior_key<solib_aix_inferior_data> solib_aix_inferior_data_handle; |
4d1eb6b4 JB |
84 | |
85 | /* Return this module's data for the given inferior. | |
86 | If none is found, add a zero'ed one now. */ | |
87 | ||
88 | static struct solib_aix_inferior_data * | |
89 | get_solib_aix_inferior_data (struct inferior *inf) | |
90 | { | |
91 | struct solib_aix_inferior_data *data; | |
92 | ||
a269fbf1 | 93 | data = solib_aix_inferior_data_handle.get (inf); |
4d1eb6b4 | 94 | if (data == NULL) |
a269fbf1 | 95 | data = solib_aix_inferior_data_handle.emplace (inf); |
4d1eb6b4 JB |
96 | |
97 | return data; | |
98 | } | |
99 | ||
100 | #if !defined(HAVE_LIBEXPAT) | |
101 | ||
102 | /* Dummy implementation if XML support is not compiled in. */ | |
103 | ||
a269fbf1 | 104 | static gdb::optional<std::vector<lm_info_aix>> |
4d1eb6b4 JB |
105 | solib_aix_parse_libraries (const char *library) |
106 | { | |
107 | static int have_warned; | |
108 | ||
109 | if (!have_warned) | |
110 | { | |
111 | have_warned = 1; | |
112 | warning (_("Can not parse XML library list; XML support was disabled " | |
dda83cd7 | 113 | "at compile time")); |
4d1eb6b4 JB |
114 | } |
115 | ||
a269fbf1 | 116 | return {}; |
814a3ff7 JB |
117 | } |
118 | ||
4d1eb6b4 JB |
119 | #else /* HAVE_LIBEXPAT */ |
120 | ||
121 | #include "xml-support.h" | |
122 | ||
123 | /* Handle the start of a <library> element. */ | |
124 | ||
125 | static void | |
126 | library_list_start_library (struct gdb_xml_parser *parser, | |
127 | const struct gdb_xml_element *element, | |
128 | void *user_data, | |
4d0fdd9b | 129 | std::vector<gdb_xml_value> &attributes) |
4d1eb6b4 | 130 | { |
a269fbf1 TT |
131 | std::vector<lm_info_aix> *list = (std::vector<lm_info_aix> *) user_data; |
132 | lm_info_aix item; | |
4d1eb6b4 JB |
133 | struct gdb_xml_value *attr; |
134 | ||
135 | attr = xml_find_attribute (attributes, "name"); | |
a269fbf1 | 136 | item.filename = (const char *) attr->value.get (); |
4d1eb6b4 JB |
137 | |
138 | attr = xml_find_attribute (attributes, "member"); | |
139 | if (attr != NULL) | |
a269fbf1 | 140 | item.member_name = (const char *) attr->value.get (); |
4d1eb6b4 JB |
141 | |
142 | attr = xml_find_attribute (attributes, "text_addr"); | |
a269fbf1 | 143 | item.text_addr = * (ULONGEST *) attr->value.get (); |
4d1eb6b4 JB |
144 | |
145 | attr = xml_find_attribute (attributes, "text_size"); | |
a269fbf1 | 146 | item.text_size = * (ULONGEST *) attr->value.get (); |
4d1eb6b4 JB |
147 | |
148 | attr = xml_find_attribute (attributes, "data_addr"); | |
a269fbf1 | 149 | item.data_addr = * (ULONGEST *) attr->value.get (); |
4d1eb6b4 JB |
150 | |
151 | attr = xml_find_attribute (attributes, "data_size"); | |
a269fbf1 | 152 | item.data_size = * (ULONGEST *) attr->value.get (); |
4d1eb6b4 | 153 | |
a269fbf1 | 154 | list->push_back (std::move (item)); |
4d1eb6b4 JB |
155 | } |
156 | ||
8c56e112 | 157 | /* Handle the start of a <library-list-aix> element. */ |
4d1eb6b4 JB |
158 | |
159 | static void | |
160 | library_list_start_list (struct gdb_xml_parser *parser, | |
dda83cd7 SM |
161 | const struct gdb_xml_element *element, |
162 | void *user_data, | |
4d0fdd9b | 163 | std::vector<gdb_xml_value> &attributes) |
4d1eb6b4 | 164 | { |
4d0fdd9b SM |
165 | char *version |
166 | = (char *) xml_find_attribute (attributes, "version")->value.get (); | |
4d1eb6b4 JB |
167 | |
168 | if (strcmp (version, "1.0") != 0) | |
169 | gdb_xml_error (parser, | |
dda83cd7 SM |
170 | _("Library list has unsupported version \"%s\""), |
171 | version); | |
4d1eb6b4 JB |
172 | } |
173 | ||
4d1eb6b4 | 174 | /* The allowed elements and attributes for an AIX library list |
8c56e112 | 175 | described in XML format. The root element is a <library-list-aix>. */ |
4d1eb6b4 JB |
176 | |
177 | static const struct gdb_xml_attribute library_attributes[] = | |
178 | { | |
179 | { "name", GDB_XML_AF_NONE, NULL, NULL }, | |
180 | { "member", GDB_XML_AF_OPTIONAL, NULL, NULL }, | |
181 | { "text_addr", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL }, | |
182 | { "text_size", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL }, | |
183 | { "data_addr", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL }, | |
184 | { "data_size", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL }, | |
185 | { NULL, GDB_XML_AF_NONE, NULL, NULL } | |
186 | }; | |
187 | ||
188 | static const struct gdb_xml_element library_list_children[] = | |
189 | { | |
190 | { "library", library_attributes, NULL, | |
191 | GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL, | |
192 | library_list_start_library, NULL}, | |
193 | { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } | |
194 | }; | |
195 | ||
196 | static const struct gdb_xml_attribute library_list_attributes[] = | |
197 | { | |
198 | { "version", GDB_XML_AF_NONE, NULL, NULL }, | |
199 | { NULL, GDB_XML_AF_NONE, NULL, NULL } | |
200 | }; | |
201 | ||
202 | static const struct gdb_xml_element library_list_elements[] = | |
203 | { | |
8c56e112 | 204 | { "library-list-aix", library_list_attributes, library_list_children, |
4d1eb6b4 JB |
205 | GDB_XML_EF_NONE, library_list_start_list, NULL }, |
206 | { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } | |
207 | }; | |
208 | ||
209 | /* Parse LIBRARY, a string containing the loader info in XML format, | |
a269fbf1 | 210 | and return a vector of lm_info_aix objects. |
4d1eb6b4 | 211 | |
a269fbf1 | 212 | Return an empty option if the parsing failed. */ |
4d1eb6b4 | 213 | |
a269fbf1 | 214 | static gdb::optional<std::vector<lm_info_aix>> |
4d1eb6b4 JB |
215 | solib_aix_parse_libraries (const char *library) |
216 | { | |
a269fbf1 | 217 | std::vector<lm_info_aix> result; |
4d1eb6b4 JB |
218 | |
219 | if (gdb_xml_parse_quick (_("aix library list"), "library-list-aix.dtd", | |
a269fbf1 TT |
220 | library_list_elements, library, &result) == 0) |
221 | return result; | |
4d1eb6b4 | 222 | |
a269fbf1 | 223 | return {}; |
4d1eb6b4 JB |
224 | } |
225 | ||
226 | #endif /* HAVE_LIBEXPAT */ | |
227 | ||
a269fbf1 TT |
228 | /* Return the loader info for the given inferior (INF), or an empty |
229 | option if the list could not be computed. | |
4d1eb6b4 JB |
230 | |
231 | Cache the result in per-inferior data, so as to avoid recomputing it | |
232 | each time this function is called. | |
233 | ||
234 | If an error occurs while computing this list, and WARNING_MSG | |
235 | is not NULL, then print a warning including WARNING_MSG and | |
236 | a description of the error. */ | |
237 | ||
a269fbf1 | 238 | static gdb::optional<std::vector<lm_info_aix>> & |
4d1eb6b4 JB |
239 | solib_aix_get_library_list (struct inferior *inf, const char *warning_msg) |
240 | { | |
241 | struct solib_aix_inferior_data *data; | |
4d1eb6b4 JB |
242 | |
243 | /* If already computed, return the cached value. */ | |
244 | data = get_solib_aix_inferior_data (inf); | |
a269fbf1 | 245 | if (data->library_list.has_value ()) |
4d1eb6b4 JB |
246 | return data->library_list; |
247 | ||
9018be22 | 248 | gdb::optional<gdb::char_vector> library_document |
8b88a78e | 249 | = target_read_stralloc (current_top_target (), TARGET_OBJECT_LIBRARIES_AIX, |
b7b030ad | 250 | NULL); |
9018be22 | 251 | if (!library_document && warning_msg != NULL) |
4d1eb6b4 | 252 | { |
ff99b71b | 253 | warning (_("%s (failed to read TARGET_OBJECT_LIBRARIES_AIX)"), |
4d1eb6b4 | 254 | warning_msg); |
a269fbf1 | 255 | return data->library_list; |
4d1eb6b4 | 256 | } |
4d1eb6b4 | 257 | |
eef401dc SM |
258 | solib_aix_debug_printf ("TARGET_OBJECT_LIBRARIES_AIX = %s", |
259 | library_document->data ()); | |
4d1eb6b4 | 260 | |
9018be22 | 261 | data->library_list = solib_aix_parse_libraries (library_document->data ()); |
a269fbf1 TT |
262 | if (!data->library_list.has_value () && warning_msg != NULL) |
263 | warning (_("%s (missing XML support?)"), warning_msg); | |
4d1eb6b4 | 264 | |
4d1eb6b4 JB |
265 | return data->library_list; |
266 | } | |
267 | ||
268 | /* If the .bss section's VMA is set to an address located before | |
269 | the end of the .data section, causing the two sections to overlap, | |
270 | return the overlap in bytes. Otherwise, return zero. | |
271 | ||
272 | Motivation: | |
273 | ||
274 | The GNU linker sometimes sets the start address of the .bss session | |
275 | before the end of the .data section, making the 2 sections overlap. | |
276 | The loader appears to handle this situation gracefully, by simply | |
277 | loading the bss section right after the end of the .data section. | |
278 | ||
279 | This means that the .data and the .bss sections are sometimes | |
280 | no longer relocated by the same amount. The problem is that | |
281 | the ldinfo data does not contain any information regarding | |
282 | the relocation of the .bss section, assuming that it would be | |
283 | identical to the information provided for the .data section | |
284 | (this is what would normally happen if the program was linked | |
285 | correctly). | |
286 | ||
287 | GDB therefore needs to detect those cases, and make the corresponding | |
288 | adjustment to the .bss section offset computed from the ldinfo data | |
289 | when necessary. This function returns the adjustment amount (or | |
290 | zero when no adjustment is needed). */ | |
291 | ||
292 | static CORE_ADDR | |
293 | solib_aix_bss_data_overlap (bfd *abfd) | |
294 | { | |
295 | struct bfd_section *data_sect, *bss_sect; | |
296 | ||
297 | data_sect = bfd_get_section_by_name (abfd, ".data"); | |
298 | if (data_sect == NULL) | |
299 | return 0; /* No overlap possible. */ | |
300 | ||
301 | bss_sect = bfd_get_section_by_name (abfd, ".bss"); | |
302 | if (bss_sect == NULL) | |
303 | return 0; /* No overlap possible. */ | |
304 | ||
305 | /* Assume the problem only occurs with linkers that place the .bss | |
306 | section after the .data section (the problem has only been | |
307 | observed when using the GNU linker, and the default linker | |
308 | script always places the .data and .bss sections in that order). */ | |
fd361982 | 309 | if (bfd_section_vma (bss_sect) < bfd_section_vma (data_sect)) |
4d1eb6b4 JB |
310 | return 0; |
311 | ||
fd361982 AM |
312 | if (bfd_section_vma (bss_sect) |
313 | < bfd_section_vma (data_sect) + bfd_section_size (data_sect)) | |
314 | return (bfd_section_vma (data_sect) + bfd_section_size (data_sect) | |
315 | - bfd_section_vma (bss_sect)); | |
4d1eb6b4 JB |
316 | |
317 | return 0; | |
318 | } | |
319 | ||
320 | /* Implement the "relocate_section_addresses" target_so_ops method. */ | |
321 | ||
322 | static void | |
323 | solib_aix_relocate_section_addresses (struct so_list *so, | |
324 | struct target_section *sec) | |
325 | { | |
4d1eb6b4 | 326 | struct bfd_section *bfd_sect = sec->the_bfd_section; |
57e6060e | 327 | bfd *abfd = bfd_sect->owner; |
fd361982 | 328 | const char *section_name = bfd_section_name (bfd_sect); |
d0e449a1 | 329 | lm_info_aix *info = (lm_info_aix *) so->lm_info; |
4d1eb6b4 JB |
330 | |
331 | if (strcmp (section_name, ".text") == 0) | |
332 | { | |
333 | sec->addr = info->text_addr; | |
334 | sec->endaddr = sec->addr + info->text_size; | |
335 | ||
336 | /* The text address given to us by the loader contains | |
337 | XCOFF headers, so we need to adjust by this much. */ | |
338 | sec->addr += bfd_sect->filepos; | |
339 | } | |
340 | else if (strcmp (section_name, ".data") == 0) | |
341 | { | |
342 | sec->addr = info->data_addr; | |
343 | sec->endaddr = sec->addr + info->data_size; | |
344 | } | |
345 | else if (strcmp (section_name, ".bss") == 0) | |
346 | { | |
060cfbef JB |
347 | /* The information provided by the loader does not include |
348 | the address of the .bss section, but we know that it gets | |
349 | relocated by the same offset as the .data section. So, | |
350 | compute the relocation offset for the .data section, and | |
351 | apply it to the .bss section as well. If the .data section | |
352 | is not defined (which seems highly unlikely), do our best | |
353 | by assuming no relocation. */ | |
354 | struct bfd_section *data_sect | |
355 | = bfd_get_section_by_name (abfd, ".data"); | |
356 | CORE_ADDR data_offset = 0; | |
357 | ||
358 | if (data_sect != NULL) | |
fd361982 | 359 | data_offset = info->data_addr - bfd_section_vma (data_sect); |
060cfbef | 360 | |
fd361982 | 361 | sec->addr = bfd_section_vma (bfd_sect) + data_offset; |
4d1eb6b4 | 362 | sec->addr += solib_aix_bss_data_overlap (abfd); |
fd361982 | 363 | sec->endaddr = sec->addr + bfd_section_size (bfd_sect); |
4d1eb6b4 JB |
364 | } |
365 | else | |
366 | { | |
367 | /* All other sections should not be relocated. */ | |
fd361982 AM |
368 | sec->addr = bfd_section_vma (bfd_sect); |
369 | sec->endaddr = sec->addr + bfd_section_size (bfd_sect); | |
4d1eb6b4 JB |
370 | } |
371 | } | |
372 | ||
373 | /* Implement the "free_so" target_so_ops method. */ | |
374 | ||
375 | static void | |
376 | solib_aix_free_so (struct so_list *so) | |
377 | { | |
6c401f72 SM |
378 | lm_info_aix *li = (lm_info_aix *) so->lm_info; |
379 | ||
eef401dc | 380 | solib_aix_debug_printf ("%s", so->so_name); |
6c401f72 SM |
381 | |
382 | delete li; | |
4d1eb6b4 JB |
383 | } |
384 | ||
385 | /* Implement the "clear_solib" target_so_ops method. */ | |
386 | ||
387 | static void | |
388 | solib_aix_clear_solib (void) | |
389 | { | |
390 | /* Nothing needed. */ | |
391 | } | |
392 | ||
393 | /* Compute and return the OBJFILE's section_offset array, using | |
6a053cb1 | 394 | the associated loader info (INFO). */ |
4d1eb6b4 | 395 | |
6a053cb1 | 396 | static section_offsets |
4d1eb6b4 | 397 | solib_aix_get_section_offsets (struct objfile *objfile, |
d0e449a1 | 398 | lm_info_aix *info) |
4d1eb6b4 | 399 | { |
4d1eb6b4 | 400 | bfd *abfd = objfile->obfd; |
4d1eb6b4 | 401 | |
6a053cb1 | 402 | section_offsets offsets (objfile->section_offsets.size ()); |
4d1eb6b4 JB |
403 | |
404 | /* .text */ | |
405 | ||
406 | if (objfile->sect_index_text != -1) | |
407 | { | |
408 | struct bfd_section *sect | |
409 | = objfile->sections[objfile->sect_index_text].the_bfd_section; | |
410 | ||
6a053cb1 | 411 | offsets[objfile->sect_index_text] |
fd361982 | 412 | = info->text_addr + sect->filepos - bfd_section_vma (sect); |
4d1eb6b4 JB |
413 | } |
414 | ||
415 | /* .data */ | |
416 | ||
417 | if (objfile->sect_index_data != -1) | |
418 | { | |
419 | struct bfd_section *sect | |
420 | = objfile->sections[objfile->sect_index_data].the_bfd_section; | |
421 | ||
6a053cb1 | 422 | offsets[objfile->sect_index_data] |
fd361982 | 423 | = info->data_addr - bfd_section_vma (sect); |
4d1eb6b4 JB |
424 | } |
425 | ||
426 | /* .bss | |
427 | ||
428 | The offset of the .bss section should be identical to the offset | |
429 | of the .data section. If no .data section (which seems hard to | |
430 | believe it is possible), assume it is zero. */ | |
431 | ||
432 | if (objfile->sect_index_bss != -1 | |
433 | && objfile->sect_index_data != -1) | |
434 | { | |
6a053cb1 TT |
435 | offsets[objfile->sect_index_bss] |
436 | = (offsets[objfile->sect_index_data] | |
4d1eb6b4 JB |
437 | + solib_aix_bss_data_overlap (abfd)); |
438 | } | |
439 | ||
440 | /* All other sections should not need relocation. */ | |
441 | ||
442 | return offsets; | |
443 | } | |
444 | ||
445 | /* Implement the "solib_create_inferior_hook" target_so_ops method. */ | |
446 | ||
447 | static void | |
448 | solib_aix_solib_create_inferior_hook (int from_tty) | |
449 | { | |
450 | const char *warning_msg = "unable to relocate main executable"; | |
4d1eb6b4 JB |
451 | |
452 | /* We need to relocate the main executable... */ | |
453 | ||
a269fbf1 TT |
454 | gdb::optional<std::vector<lm_info_aix>> &library_list |
455 | = solib_aix_get_library_list (current_inferior (), warning_msg); | |
456 | if (!library_list.has_value ()) | |
4d1eb6b4 JB |
457 | return; /* Warning already printed. */ |
458 | ||
a269fbf1 | 459 | if (library_list->empty ()) |
4d1eb6b4 JB |
460 | { |
461 | warning (_("unable to relocate main executable (no info from loader)")); | |
462 | return; | |
463 | } | |
464 | ||
a269fbf1 | 465 | lm_info_aix &exec_info = (*library_list)[0]; |
a42d7dd8 | 466 | if (current_program_space->symfile_object_file != NULL) |
4d1eb6b4 | 467 | { |
a42d7dd8 TT |
468 | objfile *objf = current_program_space->symfile_object_file; |
469 | section_offsets offsets = solib_aix_get_section_offsets (objf, | |
470 | &exec_info); | |
4d1eb6b4 | 471 | |
a42d7dd8 | 472 | objfile_relocate (objf, offsets); |
4d1eb6b4 JB |
473 | } |
474 | } | |
475 | ||
4d1eb6b4 JB |
476 | /* Implement the "current_sos" target_so_ops method. */ |
477 | ||
478 | static struct so_list * | |
479 | solib_aix_current_sos (void) | |
480 | { | |
481 | struct so_list *start = NULL, *last = NULL; | |
4d1eb6b4 JB |
482 | int ix; |
483 | ||
a269fbf1 TT |
484 | gdb::optional<std::vector<lm_info_aix>> &library_list |
485 | = solib_aix_get_library_list (current_inferior (), NULL); | |
486 | if (!library_list.has_value ()) | |
4d1eb6b4 JB |
487 | return NULL; |
488 | ||
489 | /* Build a struct so_list for each entry on the list. | |
490 | We skip the first entry, since this is the entry corresponding | |
491 | to the main executable, not a shared library. */ | |
a269fbf1 | 492 | for (ix = 1; ix < library_list->size (); ix++) |
4d1eb6b4 | 493 | { |
41bf6aca | 494 | struct so_list *new_solib = XCNEW (struct so_list); |
6c401f72 | 495 | std::string so_name; |
4d1eb6b4 | 496 | |
a269fbf1 TT |
497 | lm_info_aix &info = (*library_list)[ix]; |
498 | if (info.member_name.empty ()) | |
4d1eb6b4 | 499 | { |
a269fbf1 | 500 | /* INFO.FILENAME is probably not an archive, but rather |
4d1eb6b4 JB |
501 | a shared object. Unusual, but it should be possible |
502 | to link a program against a shared object directory, | |
503 | without having to put it in an archive first. */ | |
a269fbf1 | 504 | so_name = info.filename; |
4d1eb6b4 JB |
505 | } |
506 | else | |
507 | { | |
508 | /* This is the usual case on AIX, where the shared object | |
509 | is a member of an archive. Create a synthetic so_name | |
510 | that follows the same convention as AIX's ldd tool | |
511 | (Eg: "/lib/libc.a(shr.o)"). */ | |
a269fbf1 TT |
512 | so_name = string_printf ("%s(%s)", info.filename.c_str (), |
513 | info.member_name.c_str ()); | |
4d1eb6b4 | 514 | } |
6c401f72 | 515 | strncpy (new_solib->so_original_name, so_name.c_str (), |
4d1eb6b4 JB |
516 | SO_NAME_MAX_PATH_SIZE - 1); |
517 | new_solib->so_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0'; | |
518 | memcpy (new_solib->so_name, new_solib->so_original_name, | |
519 | SO_NAME_MAX_PATH_SIZE); | |
a269fbf1 | 520 | new_solib->lm_info = new lm_info_aix (info); |
4d1eb6b4 JB |
521 | |
522 | /* Add it to the list. */ | |
523 | if (!start) | |
dda83cd7 | 524 | last = start = new_solib; |
4d1eb6b4 | 525 | else |
dda83cd7 SM |
526 | { |
527 | last->next = new_solib; | |
528 | last = new_solib; | |
529 | } | |
4d1eb6b4 JB |
530 | } |
531 | ||
532 | return start; | |
533 | } | |
534 | ||
535 | /* Implement the "open_symbol_file_object" target_so_ops method. */ | |
536 | ||
537 | static int | |
bf469271 | 538 | solib_aix_open_symbol_file_object (int from_tty) |
4d1eb6b4 JB |
539 | { |
540 | return 0; | |
541 | } | |
542 | ||
543 | /* Implement the "in_dynsym_resolve_code" target_so_ops method. */ | |
544 | ||
545 | static int | |
546 | solib_aix_in_dynsym_resolve_code (CORE_ADDR pc) | |
547 | { | |
548 | return 0; | |
549 | } | |
550 | ||
551 | /* Implement the "bfd_open" target_so_ops method. */ | |
552 | ||
192b62ce | 553 | static gdb_bfd_ref_ptr |
692d6f97 | 554 | solib_aix_bfd_open (const char *pathname) |
4d1eb6b4 JB |
555 | { |
556 | /* The pathname is actually a synthetic filename with the following | |
557 | form: "/path/to/sharedlib(member.o)" (double-quotes excluded). | |
558 | split this into archive name and member name. | |
559 | ||
560 | FIXME: This is a little hacky. Perhaps we should provide access | |
561 | to the solib's lm_info here? */ | |
562 | const int path_len = strlen (pathname); | |
692d6f97 | 563 | const char *sep; |
4d1eb6b4 | 564 | int filename_len; |
754c39c2 | 565 | int found_file; |
4d1eb6b4 JB |
566 | |
567 | if (pathname[path_len - 1] != ')') | |
568 | return solib_bfd_open (pathname); | |
569 | ||
570 | /* Search for the associated parens. */ | |
571 | sep = strrchr (pathname, '('); | |
572 | if (sep == NULL) | |
573 | { | |
574 | /* Should never happen, but recover as best as we can (trying | |
575 | to open pathname without decoding, possibly leading to | |
576 | a failure), rather than triggering an assert failure). */ | |
577 | warning (_("missing '(' in shared object pathname: %s"), pathname); | |
578 | return solib_bfd_open (pathname); | |
579 | } | |
580 | filename_len = sep - pathname; | |
581 | ||
192b62ce TT |
582 | std::string filename (string_printf ("%.*s", filename_len, pathname)); |
583 | std::string member_name (string_printf ("%.*s", path_len - filename_len - 2, | |
584 | sep + 1)); | |
4d1eb6b4 | 585 | |
754c39c2 UW |
586 | /* Calling solib_find makes certain that sysroot path is set properly |
587 | if program has a dependency on .a archive and sysroot is set via | |
588 | set sysroot command. */ | |
797bc1cb TT |
589 | gdb::unique_xmalloc_ptr<char> found_pathname |
590 | = solib_find (filename.c_str (), &found_file); | |
754c39c2 UW |
591 | if (found_pathname == NULL) |
592 | perror_with_name (pathname); | |
797bc1cb TT |
593 | gdb_bfd_ref_ptr archive_bfd (solib_bfd_fopen (found_pathname.get (), |
594 | found_file)); | |
4d1eb6b4 JB |
595 | if (archive_bfd == NULL) |
596 | { | |
597 | warning (_("Could not open `%s' as an executable file: %s"), | |
192b62ce | 598 | filename.c_str (), bfd_errmsg (bfd_get_error ())); |
4d1eb6b4 JB |
599 | return NULL; |
600 | } | |
601 | ||
192b62ce TT |
602 | if (bfd_check_format (archive_bfd.get (), bfd_object)) |
603 | return archive_bfd; | |
4d1eb6b4 | 604 | |
192b62ce | 605 | if (! bfd_check_format (archive_bfd.get (), bfd_archive)) |
4d1eb6b4 JB |
606 | { |
607 | warning (_("\"%s\": not in executable format: %s."), | |
192b62ce | 608 | filename.c_str (), bfd_errmsg (bfd_get_error ())); |
4d1eb6b4 JB |
609 | return NULL; |
610 | } | |
611 | ||
192b62ce TT |
612 | gdb_bfd_ref_ptr object_bfd |
613 | (gdb_bfd_openr_next_archived_file (archive_bfd.get (), NULL)); | |
4d1eb6b4 JB |
614 | while (object_bfd != NULL) |
615 | { | |
c7e97679 | 616 | if (member_name == bfd_get_filename (object_bfd.get ())) |
4d1eb6b4 JB |
617 | break; |
618 | ||
192b62ce TT |
619 | object_bfd = gdb_bfd_openr_next_archived_file (archive_bfd.get (), |
620 | object_bfd.get ()); | |
4d1eb6b4 JB |
621 | } |
622 | ||
623 | if (object_bfd == NULL) | |
624 | { | |
192b62ce TT |
625 | warning (_("\"%s\": member \"%s\" missing."), filename.c_str (), |
626 | member_name.c_str ()); | |
4d1eb6b4 JB |
627 | return NULL; |
628 | } | |
629 | ||
192b62ce | 630 | if (! bfd_check_format (object_bfd.get (), bfd_object)) |
4d1eb6b4 JB |
631 | { |
632 | warning (_("%s(%s): not in object format: %s."), | |
192b62ce TT |
633 | filename.c_str (), member_name.c_str (), |
634 | bfd_errmsg (bfd_get_error ())); | |
4d1eb6b4 JB |
635 | return NULL; |
636 | } | |
637 | ||
754c39c2 UW |
638 | /* Override the returned bfd's name with the name returned from solib_find |
639 | along with appended parenthesized member name in order to allow commands | |
640 | listing all shared libraries to display. Otherwise, we would only be | |
641 | displaying the name of the archive member object. */ | |
7b958a48 AM |
642 | std::string fname = string_printf ("%s%s", |
643 | bfd_get_filename (archive_bfd.get ()), | |
644 | sep); | |
645 | bfd_set_filename (object_bfd.get (), fname.c_str ()); | |
b030cf11 | 646 | |
4d1eb6b4 JB |
647 | return object_bfd; |
648 | } | |
649 | ||
650 | /* Return the obj_section corresponding to OBJFILE's data section, | |
651 | or NULL if not found. */ | |
652 | /* FIXME: Define in a more general location? */ | |
653 | ||
654 | static struct obj_section * | |
655 | data_obj_section_from_objfile (struct objfile *objfile) | |
656 | { | |
657 | struct obj_section *osect; | |
658 | ||
659 | ALL_OBJFILE_OSECTIONS (objfile, osect) | |
fd361982 | 660 | if (strcmp (bfd_section_name (osect->the_bfd_section), ".data") == 0) |
4d1eb6b4 JB |
661 | return osect; |
662 | ||
663 | return NULL; | |
664 | } | |
665 | ||
666 | /* Return the TOC value corresponding to the given PC address, | |
667 | or raise an error if the value could not be determined. */ | |
668 | ||
669 | CORE_ADDR | |
670 | solib_aix_get_toc_value (CORE_ADDR pc) | |
671 | { | |
672 | struct obj_section *pc_osect = find_pc_section (pc); | |
673 | struct obj_section *data_osect; | |
674 | CORE_ADDR result; | |
675 | ||
676 | if (pc_osect == NULL) | |
677 | error (_("unable to find TOC entry for pc %s " | |
678 | "(no section contains this PC)"), | |
679 | core_addr_to_string (pc)); | |
680 | ||
681 | data_osect = data_obj_section_from_objfile (pc_osect->objfile); | |
682 | if (data_osect == NULL) | |
683 | error (_("unable to find TOC entry for pc %s " | |
684 | "(%s has no data section)"), | |
4262abfb | 685 | core_addr_to_string (pc), objfile_name (pc_osect->objfile)); |
4d1eb6b4 JB |
686 | |
687 | result = (obj_section_addr (data_osect) | |
688 | + xcoff_get_toc_offset (pc_osect->objfile)); | |
eef401dc SM |
689 | |
690 | solib_aix_debug_printf ("pc=%s -> %s", core_addr_to_string (pc), | |
691 | core_addr_to_string (result)); | |
4d1eb6b4 JB |
692 | |
693 | return result; | |
694 | } | |
695 | ||
696 | /* This module's normal_stop observer. */ | |
697 | ||
698 | static void | |
699 | solib_aix_normal_stop_observer (struct bpstats *unused_1, int unused_2) | |
700 | { | |
701 | struct solib_aix_inferior_data *data | |
702 | = get_solib_aix_inferior_data (current_inferior ()); | |
703 | ||
704 | /* The inferior execution has been resumed, and it just stopped | |
705 | again. This means that the list of shared libraries may have | |
706 | evolved. Reset our cached value. */ | |
a269fbf1 | 707 | data->library_list.reset (); |
4d1eb6b4 JB |
708 | } |
709 | ||
710 | /* Implements the "show debug aix-solib" command. */ | |
711 | ||
712 | static void | |
713 | show_solib_aix_debug (struct ui_file *file, int from_tty, | |
714 | struct cmd_list_element *c, const char *value) | |
715 | { | |
716 | fprintf_filtered (file, _("solib-aix debugging is %s.\n"), value); | |
717 | } | |
718 | ||
719 | /* The target_so_ops for AIX targets. */ | |
720 | struct target_so_ops solib_aix_so_ops; | |
721 | ||
6c265988 | 722 | void _initialize_solib_aix (); |
4d1eb6b4 | 723 | void |
6c265988 | 724 | _initialize_solib_aix () |
4d1eb6b4 JB |
725 | { |
726 | solib_aix_so_ops.relocate_section_addresses | |
727 | = solib_aix_relocate_section_addresses; | |
728 | solib_aix_so_ops.free_so = solib_aix_free_so; | |
729 | solib_aix_so_ops.clear_solib = solib_aix_clear_solib; | |
730 | solib_aix_so_ops.solib_create_inferior_hook | |
731 | = solib_aix_solib_create_inferior_hook; | |
4d1eb6b4 JB |
732 | solib_aix_so_ops.current_sos = solib_aix_current_sos; |
733 | solib_aix_so_ops.open_symbol_file_object | |
734 | = solib_aix_open_symbol_file_object; | |
735 | solib_aix_so_ops.in_dynsym_resolve_code | |
736 | = solib_aix_in_dynsym_resolve_code; | |
737 | solib_aix_so_ops.bfd_open = solib_aix_bfd_open; | |
738 | ||
76727919 | 739 | gdb::observers::normal_stop.attach (solib_aix_normal_stop_observer); |
4d1eb6b4 JB |
740 | |
741 | /* Debug this file's internals. */ | |
742 | add_setshow_boolean_cmd ("aix-solib", class_maintenance, | |
743 | &solib_aix_debug, _("\ | |
744 | Control the debugging traces for the solib-aix module."), _("\ | |
745 | Show whether solib-aix debugging traces are enabled."), _("\ | |
746 | When on, solib-aix debugging traces are enabled."), | |
dda83cd7 SM |
747 | NULL, |
748 | show_solib_aix_debug, | |
749 | &setdebuglist, &showdebuglist); | |
4d1eb6b4 | 750 | } |