Commit | Line | Data |
---|---|---|
419b8bfb RC |
1 | /* Handle PA64 shared libraries for GDB, the GNU Debugger. |
2 | ||
6aba47ca | 3 | Copyright (C) 2004, 2007 Free Software Foundation, Inc. |
419b8bfb RC |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
419b8bfb RC |
10 | (at your option) any later version. |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
419b8bfb RC |
19 | |
20 | HP in their infinite stupidity choose not to use standard ELF dynamic | |
21 | linker interfaces. They also choose not to make their ELF dymamic | |
22 | linker interfaces compatible with the SOM dynamic linker. The | |
23 | net result is we can not use either of the existing somsolib.c or | |
24 | solib.c. What a crock. | |
25 | ||
26 | Even more disgusting. This file depends on functions provided only | |
27 | in certain PA64 libraries. Thus this file is supposed to only be | |
28 | used native. When will HP ever learn that they need to provide the | |
29 | same functionality in all their libraries! */ | |
30 | ||
31 | #include "defs.h" | |
419b8bfb RC |
32 | #include "symtab.h" |
33 | #include "bfd.h" | |
34 | #include "symfile.h" | |
35 | #include "objfiles.h" | |
36 | #include "gdbcore.h" | |
37 | #include "target.h" | |
38 | #include "inferior.h" | |
39 | ||
40 | #include "hppa-tdep.h" | |
41 | #include "solist.h" | |
42 | #include "solib-pa64.h" | |
43 | ||
44 | #undef SOLIB_PA64_DBG | |
45 | ||
46 | /* If we are building for a SOM-only target, then we don't need this. */ | |
47 | #ifndef PA_SOM_ONLY | |
48 | ||
d0ac9ef8 MK |
49 | /* FIXME: kettenis/20041213: These includes should be eliminated. */ |
50 | #include <dlfcn.h> | |
51 | #include <elf.h> | |
52 | #include <elf_hp.h> | |
53 | ||
419b8bfb RC |
54 | struct lm_info { |
55 | struct load_module_desc desc; | |
56 | CORE_ADDR desc_addr; | |
57 | }; | |
58 | ||
59 | /* When adding fields, be sure to clear them in _initialize_pa64_solib. */ | |
60 | typedef struct | |
61 | { | |
62 | CORE_ADDR dld_flags_addr; | |
63 | LONGEST dld_flags; | |
64 | struct bfd_section *dyninfo_sect; | |
65 | int have_read_dld_descriptor; | |
66 | int is_valid; | |
67 | CORE_ADDR load_map; | |
68 | CORE_ADDR load_map_addr; | |
69 | struct load_module_desc dld_desc; | |
70 | } | |
71 | dld_cache_t; | |
72 | ||
73 | static dld_cache_t dld_cache; | |
74 | ||
75 | static int | |
76 | read_dynamic_info (asection *dyninfo_sect, dld_cache_t *dld_cache_p); | |
77 | ||
78 | static void | |
79 | pa64_relocate_section_addresses (struct so_list *so, | |
80 | struct section_table *sec) | |
81 | { | |
45851e00 RC |
82 | asection *asec = sec->the_bfd_section; |
83 | CORE_ADDR load_offset; | |
84 | ||
85 | /* Relocate all the sections based on where they got loaded. */ | |
86 | ||
87 | load_offset = bfd_section_vma (so->abfd, asec) - asec->filepos; | |
88 | ||
89 | if (asec->flags & SEC_CODE) | |
90 | { | |
91 | sec->addr += so->lm_info->desc.text_base - load_offset; | |
92 | sec->endaddr += so->lm_info->desc.text_base - load_offset; | |
93 | } | |
94 | else if (asec->flags & SEC_DATA) | |
95 | { | |
96 | sec->addr += so->lm_info->desc.data_base - load_offset; | |
97 | sec->endaddr += so->lm_info->desc.data_base - load_offset; | |
98 | } | |
419b8bfb RC |
99 | } |
100 | ||
101 | static void | |
102 | pa64_free_so (struct so_list *so) | |
103 | { | |
104 | xfree (so->lm_info); | |
105 | } | |
106 | ||
107 | static void | |
108 | pa64_clear_solib (void) | |
109 | { | |
110 | } | |
111 | ||
112 | /* Wrapper for target_read_memory for dlgetmodinfo. */ | |
113 | ||
114 | static void * | |
115 | pa64_target_read_memory (void *buffer, CORE_ADDR ptr, size_t bufsiz, int ident) | |
116 | { | |
117 | if (target_read_memory (ptr, buffer, bufsiz) != 0) | |
118 | return 0; | |
119 | return buffer; | |
120 | } | |
121 | ||
122 | /* Read the dynamic linker's internal shared library descriptor. | |
123 | ||
124 | This must happen after dld starts running, so we can't do it in | |
125 | read_dynamic_info. Record the fact that we have loaded the | |
126 | descriptor. If the library is archive bound, then return zero, else | |
127 | return nonzero. */ | |
128 | ||
129 | static int | |
130 | read_dld_descriptor (void) | |
131 | { | |
132 | char *dll_path; | |
133 | asection *dyninfo_sect; | |
134 | ||
135 | /* If necessary call read_dynamic_info to extract the contents of the | |
136 | .dynamic section from the shared library. */ | |
137 | if (!dld_cache.is_valid) | |
138 | { | |
139 | if (symfile_objfile == NULL) | |
8a3fe4f8 | 140 | error (_("No object file symbols.")); |
419b8bfb RC |
141 | |
142 | dyninfo_sect = bfd_get_section_by_name (symfile_objfile->obfd, | |
143 | ".dynamic"); | |
144 | if (!dyninfo_sect) | |
145 | { | |
146 | return 0; | |
147 | } | |
148 | ||
149 | if (!read_dynamic_info (dyninfo_sect, &dld_cache)) | |
8a3fe4f8 | 150 | error (_("Unable to read in .dynamic section information.")); |
419b8bfb RC |
151 | } |
152 | ||
153 | /* Read the load map pointer. */ | |
154 | if (target_read_memory (dld_cache.load_map_addr, | |
155 | (char *) &dld_cache.load_map, | |
156 | sizeof (dld_cache.load_map)) | |
157 | != 0) | |
158 | { | |
8a3fe4f8 | 159 | error (_("Error while reading in load map pointer.")); |
419b8bfb RC |
160 | } |
161 | ||
162 | /* Read in the dld load module descriptor */ | |
163 | if (dlgetmodinfo (-1, | |
164 | &dld_cache.dld_desc, | |
165 | sizeof (dld_cache.dld_desc), | |
166 | pa64_target_read_memory, | |
167 | 0, | |
168 | dld_cache.load_map) | |
169 | == 0) | |
170 | { | |
8a3fe4f8 | 171 | error (_("Error trying to get information about dynamic linker.")); |
419b8bfb RC |
172 | } |
173 | ||
174 | /* Indicate that we have loaded the dld descriptor. */ | |
175 | dld_cache.have_read_dld_descriptor = 1; | |
176 | ||
177 | return 1; | |
178 | } | |
179 | ||
180 | ||
181 | /* Read the .dynamic section and extract the information of interest, | |
182 | which is stored in dld_cache. The routine elf_locate_base in solib.c | |
183 | was used as a model for this. */ | |
184 | ||
185 | static int | |
186 | read_dynamic_info (asection *dyninfo_sect, dld_cache_t *dld_cache_p) | |
187 | { | |
188 | char *buf; | |
189 | char *bufend; | |
190 | CORE_ADDR dyninfo_addr; | |
191 | int dyninfo_sect_size; | |
192 | CORE_ADDR entry_addr; | |
193 | ||
194 | /* Read in .dynamic section, silently ignore errors. */ | |
195 | dyninfo_addr = bfd_section_vma (symfile_objfile->obfd, dyninfo_sect); | |
196 | dyninfo_sect_size = bfd_section_size (exec_bfd, dyninfo_sect); | |
197 | buf = alloca (dyninfo_sect_size); | |
198 | if (target_read_memory (dyninfo_addr, buf, dyninfo_sect_size)) | |
199 | return 0; | |
200 | ||
201 | /* Scan the .dynamic section and record the items of interest. | |
202 | In particular, DT_HP_DLD_FLAGS */ | |
203 | for (bufend = buf + dyninfo_sect_size, entry_addr = dyninfo_addr; | |
204 | buf < bufend; | |
205 | buf += sizeof (Elf64_Dyn), entry_addr += sizeof (Elf64_Dyn)) | |
206 | { | |
207 | Elf64_Dyn *x_dynp = (Elf64_Dyn*)buf; | |
208 | Elf64_Sxword dyn_tag; | |
209 | CORE_ADDR dyn_ptr; | |
210 | char *pbuf; | |
211 | ||
819844ad | 212 | pbuf = alloca (gdbarch_ptr_bit (current_gdbarch) / HOST_CHAR_BIT); |
419b8bfb RC |
213 | dyn_tag = bfd_h_get_64 (symfile_objfile->obfd, |
214 | (bfd_byte*) &x_dynp->d_tag); | |
215 | ||
216 | /* We can't use a switch here because dyn_tag is 64 bits and HP's | |
217 | lame comiler does not handle 64bit items in switch statements. */ | |
218 | if (dyn_tag == DT_NULL) | |
219 | break; | |
220 | else if (dyn_tag == DT_HP_DLD_FLAGS) | |
221 | { | |
222 | /* Set dld_flags_addr and dld_flags in *dld_cache_p */ | |
223 | dld_cache_p->dld_flags_addr = entry_addr + offsetof(Elf64_Dyn, d_un); | |
224 | if (target_read_memory (dld_cache_p->dld_flags_addr, | |
225 | (char*) &dld_cache_p->dld_flags, | |
226 | sizeof (dld_cache_p->dld_flags)) | |
227 | != 0) | |
228 | { | |
8a3fe4f8 | 229 | error (_("Error while reading in .dynamic section of the program.")); |
419b8bfb RC |
230 | } |
231 | } | |
232 | else if (dyn_tag == DT_HP_LOAD_MAP) | |
233 | { | |
234 | /* Dld will place the address of the load map at load_map_addr | |
235 | after it starts running. */ | |
236 | if (target_read_memory (entry_addr + offsetof(Elf64_Dyn, | |
237 | d_un.d_ptr), | |
238 | (char*) &dld_cache_p->load_map_addr, | |
239 | sizeof (dld_cache_p->load_map_addr)) | |
240 | != 0) | |
241 | { | |
8a3fe4f8 | 242 | error (_("Error while reading in .dynamic section of the program.")); |
419b8bfb RC |
243 | } |
244 | } | |
245 | else | |
246 | { | |
247 | /* tag is not of interest */ | |
248 | } | |
249 | } | |
250 | ||
251 | /* Record other information and set is_valid to 1. */ | |
252 | dld_cache_p->dyninfo_sect = dyninfo_sect; | |
253 | ||
254 | /* Verify that we read in required info. These fields are re-set to zero | |
255 | in pa64_solib_restart. */ | |
256 | ||
257 | if (dld_cache_p->dld_flags_addr != 0 && dld_cache_p->load_map_addr != 0) | |
258 | dld_cache_p->is_valid = 1; | |
259 | else | |
260 | return 0; | |
261 | ||
262 | return 1; | |
263 | } | |
264 | ||
265 | /* | |
266 | bfd_lookup_symbol -- lookup the value for a specific symbol | |
267 | ||
268 | An expensive way to lookup the value of a single symbol for | |
269 | bfd's that are only temporary anyway. This is used by the | |
270 | shared library support to find the address of the debugger | |
271 | interface structures in the shared library. | |
272 | ||
273 | Note that 0 is specifically allowed as an error return (no | |
274 | such symbol). | |
275 | */ | |
276 | ||
277 | static CORE_ADDR | |
278 | bfd_lookup_symbol (bfd *abfd, char *symname) | |
279 | { | |
280 | unsigned int storage_needed; | |
281 | asymbol *sym; | |
282 | asymbol **symbol_table; | |
283 | unsigned int number_of_symbols; | |
284 | unsigned int i; | |
285 | struct cleanup *back_to; | |
286 | CORE_ADDR symaddr = 0; | |
287 | ||
288 | storage_needed = bfd_get_symtab_upper_bound (abfd); | |
289 | ||
290 | if (storage_needed > 0) | |
291 | { | |
292 | symbol_table = (asymbol **) xmalloc (storage_needed); | |
293 | back_to = make_cleanup (xfree, symbol_table); | |
294 | number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table); | |
295 | ||
296 | for (i = 0; i < number_of_symbols; i++) | |
297 | { | |
298 | sym = *symbol_table++; | |
299 | if (strcmp (sym->name, symname) == 0) | |
300 | { | |
301 | /* Bfd symbols are section relative. */ | |
302 | symaddr = sym->value + sym->section->vma; | |
303 | break; | |
304 | } | |
305 | } | |
306 | do_cleanups (back_to); | |
307 | } | |
308 | return (symaddr); | |
309 | } | |
310 | ||
311 | ||
312 | /* This hook gets called just before the first instruction in the | |
313 | inferior process is executed. | |
314 | ||
315 | This is our opportunity to set magic flags in the inferior so | |
316 | that GDB can be notified when a shared library is mapped in and | |
317 | to tell the dynamic linker that a private copy of the library is | |
318 | needed (so GDB can set breakpoints in the library). | |
319 | ||
320 | We need to set two flag bits in this routine. | |
321 | ||
322 | DT_HP_DEBUG_PRIVATE to indicate that shared libraries should be | |
323 | mapped private. | |
324 | ||
325 | DT_HP_DEBUG_CALLBACK to indicate that we want the dynamic linker to | |
326 | call the breakpoint routine for significant events. */ | |
327 | ||
328 | static void | |
329 | pa64_solib_create_inferior_hook (void) | |
330 | { | |
331 | struct minimal_symbol *msymbol; | |
332 | unsigned int dld_flags, status; | |
333 | asection *shlib_info, *interp_sect; | |
334 | char buf[4]; | |
335 | struct objfile *objfile; | |
336 | CORE_ADDR anaddr; | |
337 | ||
338 | /* First, remove all the solib event breakpoints. Their addresses | |
339 | may have changed since the last time we ran the program. */ | |
340 | remove_solib_event_breakpoints (); | |
341 | ||
342 | if (symfile_objfile == NULL) | |
343 | return; | |
344 | ||
345 | /* First see if the objfile was dynamically linked. */ | |
346 | shlib_info = bfd_get_section_by_name (symfile_objfile->obfd, ".dynamic"); | |
347 | if (!shlib_info) | |
348 | return; | |
349 | ||
350 | /* It's got a .dynamic section, make sure it's not empty. */ | |
351 | if (bfd_section_size (symfile_objfile->obfd, shlib_info) == 0) | |
352 | return; | |
353 | ||
354 | /* Read in the .dynamic section. */ | |
355 | if (! read_dynamic_info (shlib_info, &dld_cache)) | |
8a3fe4f8 | 356 | error (_("Unable to read the .dynamic section.")); |
419b8bfb RC |
357 | |
358 | /* Turn on the flags we care about. */ | |
359 | dld_cache.dld_flags |= DT_HP_DEBUG_PRIVATE; | |
360 | dld_cache.dld_flags |= DT_HP_DEBUG_CALLBACK; | |
361 | status = target_write_memory (dld_cache.dld_flags_addr, | |
362 | (char *) &dld_cache.dld_flags, | |
363 | sizeof (dld_cache.dld_flags)); | |
364 | if (status != 0) | |
8a3fe4f8 | 365 | error (_("Unable to modify dynamic linker flags.")); |
419b8bfb RC |
366 | |
367 | /* Now we have to create a shared library breakpoint in the dynamic | |
368 | linker. This can be somewhat tricky since the symbol is inside | |
369 | the dynamic linker (for which we do not have symbols or a base | |
370 | load address! Luckily I wrote this code for solib.c years ago. */ | |
371 | interp_sect = bfd_get_section_by_name (exec_bfd, ".interp"); | |
372 | if (interp_sect) | |
373 | { | |
374 | unsigned int interp_sect_size; | |
375 | char *buf; | |
376 | CORE_ADDR load_addr; | |
377 | bfd *tmp_bfd; | |
378 | CORE_ADDR sym_addr = 0; | |
379 | ||
380 | /* Read the contents of the .interp section into a local buffer; | |
381 | the contents specify the dynamic linker this program uses. */ | |
382 | interp_sect_size = bfd_section_size (exec_bfd, interp_sect); | |
383 | buf = alloca (interp_sect_size); | |
384 | bfd_get_section_contents (exec_bfd, interp_sect, | |
385 | buf, 0, interp_sect_size); | |
386 | ||
387 | /* Now we need to figure out where the dynamic linker was | |
388 | loaded so that we can load its symbols and place a breakpoint | |
389 | in the dynamic linker itself. | |
390 | ||
391 | This address is stored on the stack. However, I've been unable | |
392 | to find any magic formula to find it for Solaris (appears to | |
393 | be trivial on GNU/Linux). Therefore, we have to try an alternate | |
394 | mechanism to find the dynamic linker's base address. */ | |
395 | tmp_bfd = bfd_openr (buf, gnutarget); | |
396 | if (tmp_bfd == NULL) | |
397 | return; | |
398 | ||
399 | /* Make sure the dynamic linker's really a useful object. */ | |
400 | if (!bfd_check_format (tmp_bfd, bfd_object)) | |
401 | { | |
8a3fe4f8 | 402 | warning (_("Unable to grok dynamic linker %s as an object file"), buf); |
419b8bfb RC |
403 | bfd_close (tmp_bfd); |
404 | return; | |
405 | } | |
406 | ||
407 | /* We find the dynamic linker's base address by examining the | |
408 | current pc (which point at the entry point for the dynamic | |
409 | linker) and subtracting the offset of the entry point. | |
410 | ||
411 | Also note the breakpoint is the second instruction in the | |
412 | routine. */ | |
413 | load_addr = read_pc () - tmp_bfd->start_address; | |
414 | sym_addr = bfd_lookup_symbol (tmp_bfd, "__dld_break"); | |
415 | sym_addr = load_addr + sym_addr + 4; | |
416 | ||
417 | /* Create the shared library breakpoint. */ | |
418 | { | |
419 | struct breakpoint *b | |
420 | = create_solib_event_breakpoint (sym_addr); | |
421 | ||
422 | /* The breakpoint is actually hard-coded into the dynamic linker, | |
423 | so we don't need to actually insert a breakpoint instruction | |
424 | there. In fact, the dynamic linker's code is immutable, even to | |
425 | ttrace, so we shouldn't even try to do that. For cases like | |
426 | this, we have "permanent" breakpoints. */ | |
427 | make_breakpoint_permanent (b); | |
428 | } | |
429 | ||
430 | /* We're done with the temporary bfd. */ | |
431 | bfd_close (tmp_bfd); | |
432 | } | |
433 | } | |
434 | ||
435 | static void | |
436 | pa64_special_symbol_handling (void) | |
437 | { | |
438 | } | |
439 | ||
440 | static struct so_list * | |
441 | pa64_current_sos (void) | |
442 | { | |
443 | struct so_list *head = 0; | |
444 | struct so_list **link_ptr = &head; | |
445 | int dll_index; | |
446 | ||
447 | /* Read in the load map pointer if we have not done so already. */ | |
448 | if (! dld_cache.have_read_dld_descriptor) | |
449 | if (! read_dld_descriptor ()) | |
450 | return NULL; | |
451 | ||
452 | /* If the libraries were not mapped private, warn the user. */ | |
453 | if ((dld_cache.dld_flags & DT_HP_DEBUG_PRIVATE) == 0) | |
8a3fe4f8 | 454 | warning (_("The shared libraries were not privately mapped; setting a\n" |
419b8bfb | 455 | "breakpoint in a shared library will not work until you rerun " |
8a3fe4f8 | 456 | "the program.\n")); |
419b8bfb | 457 | |
45851e00 | 458 | for (dll_index = -1; ; dll_index++) |
419b8bfb RC |
459 | { |
460 | struct load_module_desc dll_desc; | |
461 | char *dll_path; | |
462 | struct so_list *new; | |
463 | struct cleanup *old_chain; | |
464 | ||
45851e00 RC |
465 | if (dll_index == 0) |
466 | continue; | |
467 | ||
419b8bfb RC |
468 | /* Read in the load module descriptor. */ |
469 | if (dlgetmodinfo (dll_index, &dll_desc, sizeof (dll_desc), | |
470 | pa64_target_read_memory, 0, dld_cache.load_map) | |
471 | == 0) | |
472 | break; | |
473 | ||
474 | /* Get the name of the shared library. */ | |
475 | dll_path = (char *)dlgetname (&dll_desc, sizeof (dll_desc), | |
476 | pa64_target_read_memory, | |
477 | 0, dld_cache.load_map); | |
478 | ||
419b8bfb RC |
479 | new = (struct so_list *) xmalloc (sizeof (struct so_list)); |
480 | memset (new, 0, sizeof (struct so_list)); | |
481 | new->lm_info = (struct lm_info *) xmalloc (sizeof (struct lm_info)); | |
482 | memset (new->lm_info, 0, sizeof (struct lm_info)); | |
483 | ||
484 | strncpy (new->so_name, dll_path, SO_NAME_MAX_PATH_SIZE - 1); | |
485 | new->so_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0'; | |
486 | strcpy (new->so_original_name, new->so_name); | |
487 | ||
488 | memcpy (&new->lm_info->desc, &dll_desc, sizeof (dll_desc)); | |
489 | ||
490 | #ifdef SOLIB_PA64_DBG | |
491 | { | |
492 | struct load_module_desc *d = &new->lm_info->desc; | |
493 | printf ("\n+ library \"%s\" is described at index %d\n", new->so_name, | |
494 | dll_index); | |
495 | printf (" text_base = 0x%llx\n", d->text_base); | |
496 | printf (" text_size = 0x%llx\n", d->text_size); | |
497 | printf (" data_base = 0x%llx\n", d->data_base); | |
498 | printf (" data_size = 0x%llx\n", d->data_size); | |
499 | printf (" unwind_base = 0x%llx\n", d->unwind_base); | |
500 | printf (" linkage_ptr = 0x%llx\n", d->linkage_ptr); | |
501 | printf (" phdr_base = 0x%llx\n", d->phdr_base); | |
502 | printf (" tls_size = 0x%llx\n", d->tls_size); | |
503 | printf (" tls_start_addr = 0x%llx\n", d->tls_start_addr); | |
504 | printf (" unwind_size = 0x%llx\n", d->unwind_size); | |
505 | printf (" tls_index = 0x%llx\n", d->tls_index); | |
506 | } | |
507 | #endif | |
508 | ||
509 | /* Link the new object onto the list. */ | |
510 | new->next = NULL; | |
511 | *link_ptr = new; | |
512 | link_ptr = &new->next; | |
513 | } | |
514 | ||
515 | return head; | |
516 | } | |
517 | ||
518 | static int | |
519 | pa64_open_symbol_file_object (void *from_ttyp) | |
520 | { | |
521 | int from_tty = *(int *)from_ttyp; | |
522 | char buf[4]; | |
523 | struct load_module_desc dll_desc; | |
524 | char *dll_path; | |
525 | ||
526 | if (symfile_objfile) | |
527 | if (!query ("Attempt to reload symbols from process? ")) | |
528 | return 0; | |
529 | ||
530 | /* Read in the load map pointer if we have not done so already. */ | |
531 | if (! dld_cache.have_read_dld_descriptor) | |
532 | if (! read_dld_descriptor ()) | |
533 | return 0; | |
534 | ||
535 | /* Read in the load module descriptor. */ | |
536 | if (dlgetmodinfo (0, &dll_desc, sizeof (dll_desc), | |
537 | pa64_target_read_memory, 0, dld_cache.load_map) == 0) | |
538 | return 0; | |
539 | ||
540 | /* Get the name of the shared library. */ | |
541 | dll_path = (char *)dlgetname (&dll_desc, sizeof (dll_desc), | |
542 | pa64_target_read_memory, | |
543 | 0, dld_cache.load_map); | |
544 | ||
545 | /* Have a pathname: read the symbol file. */ | |
546 | symbol_file_add_main (dll_path, from_tty); | |
547 | ||
548 | return 1; | |
549 | } | |
550 | ||
551 | /* Return nonzero if PC is an address inside the dynamic linker. */ | |
552 | static int | |
553 | pa64_in_dynsym_resolve_code (CORE_ADDR pc) | |
554 | { | |
555 | asection *shlib_info; | |
556 | ||
557 | if (symfile_objfile == NULL) | |
558 | return 0; | |
559 | ||
560 | if (!dld_cache.have_read_dld_descriptor) | |
561 | if (!read_dld_descriptor ()) | |
562 | return 0; | |
563 | ||
564 | return (pc >= dld_cache.dld_desc.text_base | |
565 | && pc < dld_cache.dld_desc.text_base + dld_cache.dld_desc.text_size); | |
566 | } | |
567 | ||
568 | ||
569 | /* Return the GOT value for the shared library in which ADDR belongs. If | |
570 | ADDR isn't in any known shared library, return zero. */ | |
571 | ||
572 | static CORE_ADDR | |
573 | pa64_solib_get_got_by_pc (CORE_ADDR addr) | |
574 | { | |
575 | struct so_list *so_list = master_so_list (); | |
576 | CORE_ADDR got_value = 0; | |
577 | ||
578 | while (so_list) | |
579 | { | |
580 | if (so_list->lm_info->desc.text_base <= addr | |
581 | && ((so_list->lm_info->desc.text_base | |
582 | + so_list->lm_info->desc.text_size) | |
583 | > addr)) | |
45851e00 | 584 | { |
419b8bfb | 585 | got_value = so_list->lm_info->desc.linkage_ptr; |
45851e00 | 586 | break; |
419b8bfb RC |
587 | } |
588 | so_list = so_list->next; | |
589 | } | |
590 | return got_value; | |
591 | } | |
592 | ||
593 | /* Get some HPUX-specific data from a shared lib. */ | |
594 | static CORE_ADDR | |
595 | pa64_solib_thread_start_addr (struct so_list *so) | |
596 | { | |
597 | return so->lm_info->desc.tls_start_addr; | |
598 | } | |
599 | ||
600 | ||
601 | /* Return the address of the handle of the shared library in which ADDR | |
45851e00 | 602 | belongs. If ADDR isn't in any known shared library, return zero. */ |
419b8bfb RC |
603 | |
604 | static CORE_ADDR | |
605 | pa64_solib_get_solib_by_pc (CORE_ADDR addr) | |
606 | { | |
607 | struct so_list *so_list = master_so_list (); | |
608 | CORE_ADDR retval = 0; | |
609 | ||
610 | while (so_list) | |
611 | { | |
612 | if (so_list->lm_info->desc.text_base <= addr | |
613 | && ((so_list->lm_info->desc.text_base | |
614 | + so_list->lm_info->desc.text_size) | |
615 | > addr)) | |
616 | { | |
617 | retval = so_list->lm_info->desc_addr; | |
618 | break; | |
619 | } | |
620 | so_list = so_list->next; | |
621 | } | |
622 | return retval; | |
623 | } | |
624 | ||
45851e00 RC |
625 | /* pa64 libraries do not seem to set the section offsets in a standard (i.e. |
626 | SVr4) way; the text section offset stored in the file doesn't correspond | |
627 | to the place where the library is actually loaded into memory. Instead, | |
628 | we rely on the dll descriptor to tell us where things were loaded. */ | |
629 | static CORE_ADDR | |
630 | pa64_solib_get_text_base (struct objfile *objfile) | |
631 | { | |
632 | struct so_list *so; | |
633 | ||
634 | for (so = master_so_list (); so; so = so->next) | |
635 | if (so->objfile == objfile) | |
636 | return so->lm_info->desc.text_base; | |
637 | ||
638 | return 0; | |
639 | } | |
640 | ||
419b8bfb RC |
641 | static struct target_so_ops pa64_so_ops; |
642 | ||
643 | extern initialize_file_ftype _initialize_pa64_solib; /* -Wmissing-prototypes */ | |
644 | ||
645 | void | |
646 | _initialize_pa64_solib (void) | |
647 | { | |
648 | pa64_so_ops.relocate_section_addresses = pa64_relocate_section_addresses; | |
649 | pa64_so_ops.free_so = pa64_free_so; | |
650 | pa64_so_ops.clear_solib = pa64_clear_solib; | |
651 | pa64_so_ops.solib_create_inferior_hook = pa64_solib_create_inferior_hook; | |
652 | pa64_so_ops.special_symbol_handling = pa64_special_symbol_handling; | |
653 | pa64_so_ops.current_sos = pa64_current_sos; | |
654 | pa64_so_ops.open_symbol_file_object = pa64_open_symbol_file_object; | |
655 | pa64_so_ops.in_dynsym_resolve_code = pa64_in_dynsym_resolve_code; | |
656 | ||
657 | memset (&dld_cache, 0, sizeof (dld_cache)); | |
658 | } | |
659 | ||
660 | void pa64_solib_select (struct gdbarch_tdep *tdep) | |
661 | { | |
662 | current_target_so_ops = &pa64_so_ops; | |
663 | ||
664 | tdep->solib_thread_start_addr = pa64_solib_thread_start_addr; | |
665 | tdep->solib_get_got_by_pc = pa64_solib_get_got_by_pc; | |
666 | tdep->solib_get_solib_by_pc = pa64_solib_get_solib_by_pc; | |
45851e00 | 667 | tdep->solib_get_text_base = pa64_solib_get_text_base; |
419b8bfb RC |
668 | } |
669 | ||
670 | #else /* PA_SOM_ONLY */ | |
671 | ||
672 | extern initialize_file_ftype _initialize_pa64_solib; /* -Wmissing-prototypes */ | |
673 | ||
674 | void | |
675 | _initialize_pa64_solib (void) | |
676 | { | |
677 | } | |
678 | ||
679 | void pa64_solib_select (struct gdbarch_tdep *tdep) | |
680 | { | |
681 | /* For a SOM-only target, there is no pa64 solib support. This is needed | |
682 | for hppa-hpux-tdep.c to build. */ | |
8a3fe4f8 | 683 | error (_("Cannot select pa64 solib support for this configuration.")); |
419b8bfb RC |
684 | } |
685 | #endif |