Commit | Line | Data |
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c906108c | 1 | /* Handle HP SOM shared libraries for GDB, the GNU Debugger. |
c5f10366 | 2 | |
1bac305b | 3 | Copyright 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002, |
8b92e4d5 | 4 | 2003, 2004 Free Software Foundation, Inc. |
c906108c | 5 | |
c5aa993b | 6 | This file is part of GDB. |
c906108c | 7 | |
c5aa993b JM |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
c906108c | 12 | |
c5aa993b JM |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
c906108c | 17 | |
c5aa993b JM |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. | |
c906108c | 22 | |
c5aa993b JM |
23 | Written by the Center for Software Science at the Univerity of Utah |
24 | and by Cygnus Support. */ | |
c906108c SS |
25 | |
26 | ||
27 | #include "defs.h" | |
28 | ||
29 | #include "frame.h" | |
30 | #include "bfd.h" | |
31 | #include "som.h" | |
32 | #include "libhppa.h" | |
33 | #include "gdbcore.h" | |
34 | #include "symtab.h" | |
35 | #include "breakpoint.h" | |
36 | #include "symfile.h" | |
37 | #include "objfiles.h" | |
38 | #include "inferior.h" | |
39 | #include "gdb-stabs.h" | |
40 | #include "gdb_stat.h" | |
41 | #include "gdbcmd.h" | |
c906108c | 42 | #include "language.h" |
4e052eda | 43 | #include "regcache.h" |
a7ff40e7 | 44 | #include "gdb_assert.h" |
4646aa9d | 45 | #include "exec.h" |
7c46b9fb | 46 | #include "hppa-tdep.h" |
c906108c SS |
47 | |
48 | #include <fcntl.h> | |
49 | ||
50 | #ifndef O_BINARY | |
51 | #define O_BINARY 0 | |
52 | #endif | |
53 | ||
89676665 RC |
54 | #ifndef SHL_LOAD |
55 | #define SHL_LOAD 4 | |
56 | #endif | |
57 | ||
58 | #ifndef SHL_UNLOAD | |
59 | #define SHL_UNLOAD 8 | |
60 | #endif | |
61 | ||
c906108c SS |
62 | /* Uncomment this to turn on some debugging output. |
63 | */ | |
64 | ||
65 | /* #define SOLIB_DEBUG | |
66 | */ | |
c5aa993b | 67 | |
c906108c | 68 | /* This lives in hppa-tdep.c. */ |
a14ed312 | 69 | extern struct unwind_table_entry *find_unwind_entry (CORE_ADDR pc); |
c906108c SS |
70 | |
71 | /* These ought to be defined in some public interface, but aren't. They | |
72 | define the meaning of the various bits in the distinguished __dld_flags | |
73 | variable that is declared in every debuggable a.out on HP-UX, and that | |
74 | is shared between the debugger and the dynamic linker. | |
c5aa993b | 75 | */ |
c906108c SS |
76 | #define DLD_FLAGS_MAPPRIVATE 0x1 |
77 | #define DLD_FLAGS_HOOKVALID 0x2 | |
78 | #define DLD_FLAGS_LISTVALID 0x4 | |
79 | #define DLD_FLAGS_BOR_ENABLE 0x8 | |
80 | ||
81 | /* TODO: | |
82 | ||
c906108c SS |
83 | * Support for hpux8 dynamic linker. */ |
84 | ||
85 | /* The basic structure which describes a dynamically loaded object. This | |
86 | data structure is private to the dynamic linker and isn't found in | |
87 | any HPUX include file. */ | |
88 | ||
89 | struct som_solib_mapped_entry | |
c5aa993b JM |
90 | { |
91 | /* The name of the library. */ | |
92 | char *name; | |
c906108c | 93 | |
c5aa993b JM |
94 | /* Version of this structure (it is expected to change again in hpux10). */ |
95 | unsigned char struct_version; | |
c906108c | 96 | |
c5aa993b JM |
97 | /* Binding mode for this library. */ |
98 | unsigned char bind_mode; | |
c906108c | 99 | |
c5aa993b JM |
100 | /* Version of this library. */ |
101 | short library_version; | |
c906108c | 102 | |
c5aa993b JM |
103 | /* Start of text address, |
104 | * link-time text location (length of text area), | |
105 | * end of text address. */ | |
106 | CORE_ADDR text_addr; | |
107 | CORE_ADDR text_link_addr; | |
108 | CORE_ADDR text_end; | |
c906108c | 109 | |
c5aa993b JM |
110 | /* Start of data, start of bss and end of data. */ |
111 | CORE_ADDR data_start; | |
112 | CORE_ADDR bss_start; | |
113 | CORE_ADDR data_end; | |
c906108c | 114 | |
c5aa993b JM |
115 | /* Value of linkage pointer (%r19). */ |
116 | CORE_ADDR got_value; | |
c906108c | 117 | |
c5aa993b JM |
118 | /* Next entry. */ |
119 | struct som_solib_mapped_entry *next; | |
c906108c | 120 | |
c5aa993b JM |
121 | /* There are other fields, but I don't have information as to what is |
122 | contained in them. */ | |
c906108c | 123 | |
c5aa993b | 124 | /* For versions from HPUX-10.30 and up */ |
c906108c | 125 | |
c5aa993b JM |
126 | /* Address in target of offset from thread-local register of |
127 | * start of this thread's data. I.e., the first thread-local | |
128 | * variable in this shared library starts at *(tsd_start_addr) | |
129 | * from that area pointed to by cr27 (mpsfu_hi). | |
130 | * | |
131 | * We do the indirection as soon as we read it, so from then | |
132 | * on it's the offset itself. | |
133 | */ | |
134 | CORE_ADDR tsd_start_addr; | |
c906108c | 135 | |
c5aa993b JM |
136 | /* Following this are longwords holding: |
137 | ||
138 | * ?, ?, ?, ptr to -1, ptr to-1, ptr to lib name (leaf name), | |
139 | * ptr to __data_start, ptr to __data_end | |
140 | */ | |
c906108c | 141 | |
c5aa993b JM |
142 | |
143 | }; | |
c906108c SS |
144 | |
145 | /* A structure to keep track of all the known shared objects. */ | |
146 | struct so_list | |
c5aa993b JM |
147 | { |
148 | struct som_solib_mapped_entry som_solib; | |
149 | struct objfile *objfile; | |
150 | bfd *abfd; | |
151 | struct section_table *sections; | |
152 | struct section_table *sections_end; | |
c906108c SS |
153 | /* elz: added this field to store the address in target space (in the |
154 | library) of the library descriptor (handle) which we read into | |
c5aa993b JM |
155 | som_solib_mapped_entry structure */ |
156 | CORE_ADDR solib_addr; | |
157 | struct so_list *next; | |
158 | ||
159 | }; | |
c906108c SS |
160 | |
161 | static struct so_list *so_list_head; | |
162 | ||
163 | ||
164 | /* This is the cumulative size in bytes of the symbol tables of all | |
165 | shared objects on the so_list_head list. (When we say size, here | |
166 | we mean of the information before it is brought into memory and | |
167 | potentially expanded by GDB.) When adding a new shlib, this value | |
b7209cb4 | 168 | is compared against the threshold size, held by auto_solib_limit |
c906108c | 169 | (in megabytes). If adding symbols for the new shlib would cause |
b7209cb4 FF |
170 | the total size to exceed the threshold, then the new shlib's |
171 | symbols are not loaded. */ | |
c5aa993b | 172 | static LONGEST som_solib_total_st_size; |
c906108c SS |
173 | |
174 | /* When the threshold is reached for any shlib, we refuse to add | |
175 | symbols for subsequent shlibs, even if those shlibs' symbols would | |
176 | be small enough to fit under the threshold. (Although this may | |
177 | result in one, early large shlib preventing the loading of later, | |
178 | smalller shlibs' symbols, it allows us to issue one informational | |
179 | message. The alternative, to issue a message for each shlib whose | |
180 | symbols aren't loaded, could be a big annoyance where the threshold | |
181 | is exceeded due to a very large number of shlibs.) | |
c5aa993b JM |
182 | */ |
183 | static int som_solib_st_size_threshold_exceeded; | |
c906108c SS |
184 | |
185 | /* These addresses should be filled in by som_solib_create_inferior_hook. | |
186 | They are also used elsewhere in this module. | |
c5aa993b JM |
187 | */ |
188 | typedef struct | |
189 | { | |
190 | CORE_ADDR address; | |
191 | struct unwind_table_entry *unwind; | |
192 | } | |
193 | addr_and_unwind_t; | |
c906108c SS |
194 | |
195 | /* When adding fields, be sure to clear them in _initialize_som_solib. */ | |
c5aa993b JM |
196 | static struct |
197 | { | |
504d5c7e | 198 | int is_valid; |
c5aa993b JM |
199 | addr_and_unwind_t hook; |
200 | addr_and_unwind_t hook_stub; | |
201 | addr_and_unwind_t load; | |
202 | addr_and_unwind_t load_stub; | |
203 | addr_and_unwind_t unload; | |
204 | addr_and_unwind_t unload2; | |
205 | addr_and_unwind_t unload_stub; | |
206 | } | |
207 | dld_cache; | |
c906108c SS |
208 | |
209 | ||
210 | ||
a14ed312 | 211 | static void som_sharedlibrary_info_command (char *, int); |
c906108c | 212 | |
a14ed312 | 213 | static void som_solib_sharedlibrary_command (char *, int); |
c906108c SS |
214 | |
215 | static LONGEST | |
fba45db2 | 216 | som_solib_sizeof_symbol_table (char *filename) |
c906108c | 217 | { |
c5aa993b JM |
218 | bfd *abfd; |
219 | int desc; | |
220 | char *absolute_name; | |
221 | LONGEST st_size = (LONGEST) 0; | |
222 | asection *sect; | |
c906108c SS |
223 | |
224 | /* We believe that filename was handed to us by the dynamic linker, and | |
225 | is therefore always an absolute path. | |
c5aa993b | 226 | */ |
014d698b EZ |
227 | desc = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, filename, |
228 | O_RDONLY | O_BINARY, 0, &absolute_name); | |
c906108c SS |
229 | if (desc < 0) |
230 | { | |
231 | perror_with_name (filename); | |
232 | } | |
233 | filename = absolute_name; | |
234 | ||
235 | abfd = bfd_fdopenr (filename, gnutarget, desc); | |
c5aa993b | 236 | if (!abfd) |
c906108c SS |
237 | { |
238 | close (desc); | |
b8c9b27d | 239 | make_cleanup (xfree, filename); |
c906108c SS |
240 | error ("\"%s\": can't open to read symbols: %s.", filename, |
241 | bfd_errmsg (bfd_get_error ())); | |
242 | } | |
c5aa993b JM |
243 | |
244 | if (!bfd_check_format (abfd, bfd_object)) /* Reads in section info */ | |
c906108c | 245 | { |
c5aa993b | 246 | bfd_close (abfd); /* This also closes desc */ |
b8c9b27d | 247 | make_cleanup (xfree, filename); |
c906108c SS |
248 | error ("\"%s\": can't read symbols: %s.", filename, |
249 | bfd_errmsg (bfd_get_error ())); | |
250 | } | |
251 | ||
252 | /* Sum the sizes of the various sections that compose debug info. */ | |
253 | ||
254 | /* This contains non-DOC information. */ | |
255 | sect = bfd_get_section_by_name (abfd, "$DEBUG$"); | |
256 | if (sect) | |
257 | st_size += (LONGEST) bfd_section_size (abfd, sect); | |
258 | ||
259 | /* This contains DOC information. */ | |
260 | sect = bfd_get_section_by_name (abfd, "$PINFO$"); | |
261 | if (sect) | |
262 | st_size += (LONGEST) bfd_section_size (abfd, sect); | |
263 | ||
c5aa993b | 264 | bfd_close (abfd); /* This also closes desc */ |
b8c9b27d | 265 | xfree (filename); |
c906108c SS |
266 | |
267 | /* Unfortunately, just summing the sizes of various debug info | |
268 | sections isn't a very accurate measurement of how much heap | |
269 | space the debugger will need to hold them. It also doesn't | |
270 | account for space needed by linker (aka "minimal") symbols. | |
271 | ||
272 | Anecdotal evidence suggests that just summing the sizes of | |
273 | debug-info-related sections understates the heap space needed | |
274 | to represent it internally by about an order of magnitude. | |
275 | ||
276 | Since it's not exactly brain surgery we're doing here, rather | |
277 | than attempt to more accurately measure the size of a shlib's | |
278 | symbol table in GDB's heap, we'll just apply a 10x fudge- | |
279 | factor to the debug info sections' size-sum. No, this doesn't | |
280 | account for minimal symbols in non-debuggable shlibs. But it | |
281 | all roughly washes out in the end. | |
c5aa993b | 282 | */ |
c906108c SS |
283 | return st_size * (LONGEST) 10; |
284 | } | |
285 | ||
286 | ||
287 | static void | |
fba45db2 KB |
288 | som_solib_add_solib_objfile (struct so_list *so, char *name, int from_tty, |
289 | CORE_ADDR text_addr) | |
c906108c | 290 | { |
7c46b9fb | 291 | struct hppa_objfile_private *obj_private; |
9ca0e47c | 292 | struct obj_section *s; |
c5aa993b | 293 | |
9ca0e47c | 294 | so->objfile = symbol_file_add (name, from_tty, NULL, 0, OBJF_SHARED); |
c906108c SS |
295 | so->abfd = so->objfile->obfd; |
296 | ||
9ca0e47c MC |
297 | /* syms_from_objfile has bizarre section offset code, |
298 | so I do my own right here. */ | |
299 | for (s = so->objfile->sections; s < so->objfile->sections_end; s++) | |
300 | { | |
301 | flagword aflag = bfd_get_section_flags(so->abfd, s->the_bfd_section); | |
302 | if (aflag & SEC_CODE) | |
303 | { | |
304 | s->addr += so->som_solib.text_addr - so->som_solib.text_link_addr; | |
305 | s->endaddr += so->som_solib.text_addr - so->som_solib.text_link_addr; | |
306 | } | |
307 | else if (aflag & SEC_DATA) | |
308 | { | |
309 | s->addr += so->som_solib.data_start; | |
310 | s->endaddr += so->som_solib.data_start; | |
311 | } | |
312 | else | |
313 | ; | |
314 | } | |
315 | ||
c906108c SS |
316 | /* Mark this as a shared library and save private data. |
317 | */ | |
318 | so->objfile->flags |= OBJF_SHARED; | |
319 | ||
7c46b9fb RC |
320 | obj_private = (struct hppa_objfile_private *) |
321 | objfile_data (so->objfile, hppa_objfile_priv_data); | |
322 | if (obj_private == NULL) | |
c906108c | 323 | { |
7c46b9fb | 324 | obj_private = (struct hppa_objfile_private *) |
8b92e4d5 | 325 | obstack_alloc (&so->objfile->objfile_obstack, |
7c46b9fb RC |
326 | sizeof (struct hppa_objfile_private)); |
327 | set_objfile_data (so->objfile, hppa_objfile_priv_data, obj_private); | |
c906108c | 328 | obj_private->unwind_info = NULL; |
c5aa993b | 329 | obj_private->so_info = NULL; |
c5aa993b | 330 | } |
c906108c | 331 | |
c906108c SS |
332 | obj_private->so_info = so; |
333 | ||
334 | if (!bfd_check_format (so->abfd, bfd_object)) | |
335 | { | |
336 | error ("\"%s\": not in executable format: %s.", | |
c5aa993b | 337 | name, bfd_errmsg (bfd_get_error ())); |
c906108c SS |
338 | } |
339 | } | |
340 | ||
341 | ||
342 | static void | |
fba45db2 KB |
343 | som_solib_load_symbols (struct so_list *so, char *name, int from_tty, |
344 | CORE_ADDR text_addr, struct target_ops *target) | |
c906108c | 345 | { |
c5aa993b JM |
346 | struct section_table *p; |
347 | int status; | |
348 | char buf[4]; | |
349 | CORE_ADDR presumed_data_start; | |
c906108c SS |
350 | |
351 | #ifdef SOLIB_DEBUG | |
c5aa993b | 352 | printf ("--Adding symbols for shared library \"%s\"\n", name); |
c906108c SS |
353 | #endif |
354 | ||
355 | som_solib_add_solib_objfile (so, name, from_tty, text_addr); | |
356 | ||
357 | /* Now we need to build a section table for this library since | |
358 | we might be debugging a core file from a dynamically linked | |
359 | executable in which the libraries were not privately mapped. */ | |
360 | if (build_section_table (so->abfd, | |
c5aa993b JM |
361 | &so->sections, |
362 | &so->sections_end)) | |
c906108c SS |
363 | { |
364 | error ("Unable to build section table for shared library\n."); | |
365 | return; | |
366 | } | |
367 | ||
368 | /* Relocate all the sections based on where they got loaded. */ | |
369 | for (p = so->sections; p < so->sections_end; p++) | |
370 | { | |
371 | if (p->the_bfd_section->flags & SEC_CODE) | |
c5aa993b | 372 | { |
b8fbeb18 EZ |
373 | p->addr += ANOFFSET (so->objfile->section_offsets, SECT_OFF_TEXT (so->objfile)); |
374 | p->endaddr += ANOFFSET (so->objfile->section_offsets, SECT_OFF_TEXT (so->objfile)); | |
c5aa993b | 375 | } |
c906108c | 376 | else if (p->the_bfd_section->flags & SEC_DATA) |
c5aa993b | 377 | { |
b8fbeb18 EZ |
378 | p->addr += ANOFFSET (so->objfile->section_offsets, SECT_OFF_DATA (so->objfile)); |
379 | p->endaddr += ANOFFSET (so->objfile->section_offsets, SECT_OFF_DATA (so->objfile)); | |
c5aa993b | 380 | } |
c906108c SS |
381 | } |
382 | ||
383 | /* Now see if we need to map in the text and data for this shared | |
384 | library (for example debugging a core file which does not use | |
385 | private shared libraries.). | |
386 | ||
387 | Carefully peek at the first text address in the library. If the | |
388 | read succeeds, then the libraries were privately mapped and were | |
389 | included in the core dump file. | |
390 | ||
391 | If the peek failed, then the libraries were not privately mapped | |
392 | and are not in the core file, we'll have to read them in ourselves. */ | |
393 | status = target_read_memory (text_addr, buf, 4); | |
394 | if (status != 0) | |
395 | { | |
396 | int old, new; | |
c906108c SS |
397 | |
398 | new = so->sections_end - so->sections; | |
6426a772 JM |
399 | |
400 | old = target_resize_to_sections (target, new); | |
401 | ||
c906108c | 402 | /* Copy over the old data before it gets clobbered. */ |
c5aa993b JM |
403 | memcpy ((char *) (target->to_sections + old), |
404 | so->sections, | |
405 | ((sizeof (struct section_table)) * new)); | |
c906108c SS |
406 | } |
407 | } | |
408 | ||
409 | ||
9a043c1d AC |
410 | /* FIXME: cagney/2003-02-01: This just isn't right. Given an address |
411 | within the target's address space, this converts the value into an | |
412 | address within the host's (i.e., GDB's) address space. Given that | |
413 | the host/target address spaces are separate, this can't be right. */ | |
414 | ||
415 | static void * | |
416 | hpux_address_to_host_pointer_hack (CORE_ADDR addr) | |
417 | { | |
418 | void *ptr; | |
419 | ||
420 | gdb_assert (sizeof (ptr) == TYPE_LENGTH (builtin_type_void_data_ptr)); | |
421 | ADDRESS_TO_POINTER (builtin_type_void_data_ptr, &ptr, addr); | |
422 | return ptr; | |
423 | } | |
424 | ||
c906108c | 425 | /* Add symbols from shared libraries into the symtab list, unless the |
b7209cb4 | 426 | size threshold specified by auto_solib_limit (in megabytes) would |
c906108c SS |
427 | be exceeded. */ |
428 | ||
429 | void | |
990f9fe3 | 430 | som_solib_add (char *arg_string, int from_tty, struct target_ops *target, int readsyms) |
c906108c SS |
431 | { |
432 | struct minimal_symbol *msymbol; | |
433 | struct so_list *so_list_tail; | |
434 | CORE_ADDR addr; | |
435 | asection *shlib_info; | |
436 | int status; | |
437 | unsigned int dld_flags; | |
438 | char buf[4], *re_err; | |
c5aa993b | 439 | int threshold_warning_given = 0; |
c906108c SS |
440 | |
441 | /* First validate our arguments. */ | |
bde58177 AC |
442 | re_err = re_comp (arg_string ? arg_string : "."); |
443 | if (re_err != NULL) | |
c906108c SS |
444 | { |
445 | error ("Invalid regexp: %s", re_err); | |
446 | } | |
447 | ||
448 | /* If we're debugging a core file, or have attached to a running | |
449 | process, then som_solib_create_inferior_hook will not have been | |
450 | called. | |
451 | ||
452 | We need to first determine if we're dealing with a dynamically | |
453 | linked executable. If not, then return without an error or warning. | |
454 | ||
455 | We also need to examine __dld_flags to determine if the shared library | |
456 | list is valid and to determine if the libraries have been privately | |
457 | mapped. */ | |
458 | if (symfile_objfile == NULL) | |
459 | return; | |
460 | ||
461 | /* First see if the objfile was dynamically linked. */ | |
462 | shlib_info = bfd_get_section_by_name (symfile_objfile->obfd, "$SHLIB_INFO$"); | |
463 | if (!shlib_info) | |
464 | return; | |
465 | ||
466 | /* It's got a $SHLIB_INFO$ section, make sure it's not empty. */ | |
467 | if (bfd_section_size (symfile_objfile->obfd, shlib_info) == 0) | |
468 | return; | |
469 | ||
470 | msymbol = lookup_minimal_symbol ("__dld_flags", NULL, NULL); | |
471 | if (msymbol == NULL) | |
472 | { | |
473 | error ("Unable to find __dld_flags symbol in object file.\n"); | |
474 | return; | |
475 | } | |
476 | ||
477 | addr = SYMBOL_VALUE_ADDRESS (msymbol); | |
478 | /* Read the current contents. */ | |
479 | status = target_read_memory (addr, buf, 4); | |
480 | if (status != 0) | |
481 | { | |
482 | error ("Unable to read __dld_flags\n"); | |
483 | return; | |
484 | } | |
485 | dld_flags = extract_unsigned_integer (buf, 4); | |
486 | ||
487 | /* __dld_list may not be valid. If not, then we punt, warning the user if | |
488 | we were called as a result of the add-symfile command. | |
c5aa993b | 489 | */ |
c906108c SS |
490 | if ((dld_flags & DLD_FLAGS_LISTVALID) == 0) |
491 | { | |
492 | if (from_tty) | |
c5aa993b | 493 | error ("__dld_list is not valid according to __dld_flags.\n"); |
c906108c SS |
494 | return; |
495 | } | |
496 | ||
497 | /* If the libraries were not mapped private, warn the user. */ | |
498 | if ((dld_flags & DLD_FLAGS_MAPPRIVATE) == 0) | |
499 | warning ("The shared libraries were not privately mapped; setting a\nbreakpoint in a shared library will not work until you rerun the program.\n"); | |
500 | ||
501 | msymbol = lookup_minimal_symbol ("__dld_list", NULL, NULL); | |
502 | if (!msymbol) | |
503 | { | |
504 | /* Older crt0.o files (hpux8) don't have __dld_list as a symbol, | |
c5aa993b | 505 | but the data is still available if you know where to look. */ |
c906108c SS |
506 | msymbol = lookup_minimal_symbol ("__dld_flags", NULL, NULL); |
507 | if (!msymbol) | |
508 | { | |
509 | error ("Unable to find dynamic library list.\n"); | |
510 | return; | |
511 | } | |
512 | addr = SYMBOL_VALUE_ADDRESS (msymbol) - 8; | |
513 | } | |
514 | else | |
515 | addr = SYMBOL_VALUE_ADDRESS (msymbol); | |
516 | ||
517 | status = target_read_memory (addr, buf, 4); | |
518 | if (status != 0) | |
519 | { | |
520 | error ("Unable to find dynamic library list.\n"); | |
521 | return; | |
522 | } | |
523 | ||
524 | addr = extract_unsigned_integer (buf, 4); | |
525 | ||
526 | /* If addr is zero, then we're using an old dynamic loader which | |
527 | doesn't maintain __dld_list. We'll have to use a completely | |
528 | different approach to get shared library information. */ | |
529 | if (addr == 0) | |
530 | goto old_dld; | |
531 | ||
532 | /* Using the information in __dld_list is the preferred method | |
533 | to get at shared library information. It doesn't depend on | |
534 | any functions in /opt/langtools/lib/end.o and has a chance of working | |
535 | with hpux10 when it is released. */ | |
536 | status = target_read_memory (addr, buf, 4); | |
537 | if (status != 0) | |
538 | { | |
539 | error ("Unable to find dynamic library list.\n"); | |
540 | return; | |
541 | } | |
542 | ||
543 | /* addr now holds the address of the first entry in the dynamic | |
544 | library list. */ | |
545 | addr = extract_unsigned_integer (buf, 4); | |
546 | ||
547 | /* Now that we have a pointer to the dynamic library list, walk | |
548 | through it and add the symbols for each library. */ | |
549 | ||
550 | so_list_tail = so_list_head; | |
551 | /* Find the end of the list of shared objects. */ | |
552 | while (so_list_tail && so_list_tail->next) | |
553 | so_list_tail = so_list_tail->next; | |
554 | ||
555 | #ifdef SOLIB_DEBUG | |
c5aa993b | 556 | printf ("--About to read shared library list data\n"); |
c906108c SS |
557 | #endif |
558 | ||
559 | /* "addr" will always point to the base of the | |
560 | * current data entry describing the current | |
561 | * shared library. | |
562 | */ | |
563 | while (1) | |
564 | { | |
565 | CORE_ADDR name_addr, text_addr; | |
566 | unsigned int name_len; | |
567 | char *name; | |
568 | struct so_list *new_so; | |
569 | struct so_list *so_list = so_list_head; | |
570 | struct stat statbuf; | |
c5aa993b JM |
571 | LONGEST st_size; |
572 | int is_main_program; | |
c906108c SS |
573 | |
574 | if (addr == 0) | |
575 | break; | |
576 | ||
577 | /* Get a pointer to the name of this library. */ | |
578 | status = target_read_memory (addr, buf, 4); | |
579 | if (status != 0) | |
580 | goto err; | |
581 | ||
582 | name_addr = extract_unsigned_integer (buf, 4); | |
583 | name_len = 0; | |
584 | while (1) | |
585 | { | |
586 | target_read_memory (name_addr + name_len, buf, 1); | |
587 | if (status != 0) | |
588 | goto err; | |
589 | ||
590 | name_len++; | |
591 | if (*buf == '\0') | |
592 | break; | |
593 | } | |
594 | name = alloca (name_len); | |
595 | status = target_read_memory (name_addr, name, name_len); | |
596 | if (status != 0) | |
597 | goto err; | |
598 | ||
599 | /* See if we've already loaded something with this name. */ | |
600 | while (so_list) | |
601 | { | |
602 | if (!strcmp (so_list->som_solib.name, name)) | |
603 | break; | |
604 | so_list = so_list->next; | |
605 | } | |
606 | ||
607 | /* See if the file exists. If not, give a warning, but don't | |
c5aa993b | 608 | die. */ |
c906108c SS |
609 | status = stat (name, &statbuf); |
610 | if (status == -1) | |
611 | { | |
612 | warning ("Can't find file %s referenced in dld_list.", name); | |
613 | ||
614 | status = target_read_memory (addr + 36, buf, 4); | |
615 | if (status != 0) | |
616 | goto err; | |
617 | ||
c5aa993b | 618 | addr = (CORE_ADDR) extract_unsigned_integer (buf, 4); |
c906108c SS |
619 | continue; |
620 | } | |
621 | ||
622 | /* If we've already loaded this one or it's the main program, skip it. */ | |
623 | is_main_program = (strcmp (name, symfile_objfile->name) == 0); | |
624 | if (so_list || is_main_program) | |
625 | { | |
c5aa993b JM |
626 | /* This is the "next" pointer in the strcuture. |
627 | */ | |
c906108c SS |
628 | status = target_read_memory (addr + 36, buf, 4); |
629 | if (status != 0) | |
630 | goto err; | |
631 | ||
632 | addr = (CORE_ADDR) extract_unsigned_integer (buf, 4); | |
633 | ||
c5aa993b JM |
634 | /* Record the main program's symbol table size. */ |
635 | if (is_main_program && !so_list) | |
636 | { | |
637 | st_size = som_solib_sizeof_symbol_table (name); | |
638 | som_solib_total_st_size += st_size; | |
639 | } | |
640 | ||
641 | /* Was this a shlib that we noted but didn't load the symbols for? | |
642 | If so, were we invoked this time from the command-line, via | |
643 | a 'sharedlibrary' or 'add-symbol-file' command? If yes to | |
644 | both, we'd better load the symbols this time. | |
645 | */ | |
646 | if (from_tty && so_list && !is_main_program && (so_list->objfile == NULL)) | |
647 | som_solib_load_symbols (so_list, | |
648 | name, | |
649 | from_tty, | |
650 | so_list->som_solib.text_addr, | |
651 | target); | |
c906108c SS |
652 | |
653 | continue; | |
654 | } | |
655 | ||
656 | name = obsavestring (name, name_len - 1, | |
4a146b47 | 657 | &symfile_objfile->objfile_obstack); |
c906108c SS |
658 | |
659 | status = target_read_memory (addr + 8, buf, 4); | |
660 | if (status != 0) | |
661 | goto err; | |
662 | ||
663 | text_addr = extract_unsigned_integer (buf, 4); | |
664 | ||
665 | new_so = (struct so_list *) xmalloc (sizeof (struct so_list)); | |
c5aa993b | 666 | memset ((char *) new_so, 0, sizeof (struct so_list)); |
c906108c SS |
667 | if (so_list_head == NULL) |
668 | { | |
669 | so_list_head = new_so; | |
670 | so_list_tail = new_so; | |
671 | } | |
672 | else | |
673 | { | |
674 | so_list_tail->next = new_so; | |
675 | so_list_tail = new_so; | |
676 | } | |
677 | ||
678 | /* Fill in all the entries in GDB's shared library list. | |
679 | */ | |
c5aa993b | 680 | |
c906108c SS |
681 | new_so->solib_addr = addr; |
682 | new_so->som_solib.name = name; | |
683 | status = target_read_memory (addr + 4, buf, 4); | |
684 | if (status != 0) | |
685 | goto err; | |
686 | ||
687 | new_so->som_solib.struct_version = extract_unsigned_integer (buf + 3, 1); | |
688 | new_so->som_solib.bind_mode = extract_unsigned_integer (buf + 2, 1); | |
c5aa993b JM |
689 | /* Following is "high water mark", highest version number |
690 | * seen, rather than plain version number. | |
691 | */ | |
c906108c SS |
692 | new_so->som_solib.library_version = extract_unsigned_integer (buf, 2); |
693 | new_so->som_solib.text_addr = text_addr; | |
694 | ||
c5aa993b JM |
695 | /* Q: What about longword at "addr + 8"? |
696 | * A: It's read above, out of order, into "text_addr". | |
697 | */ | |
c906108c SS |
698 | |
699 | status = target_read_memory (addr + 12, buf, 4); | |
700 | if (status != 0) | |
701 | goto err; | |
702 | ||
703 | new_so->som_solib.text_link_addr = extract_unsigned_integer (buf, 4); | |
704 | ||
705 | status = target_read_memory (addr + 16, buf, 4); | |
706 | if (status != 0) | |
707 | goto err; | |
708 | ||
709 | new_so->som_solib.text_end = extract_unsigned_integer (buf, 4); | |
710 | ||
711 | status = target_read_memory (addr + 20, buf, 4); | |
712 | if (status != 0) | |
713 | goto err; | |
714 | ||
715 | new_so->som_solib.data_start = extract_unsigned_integer (buf, 4); | |
716 | ||
717 | status = target_read_memory (addr + 24, buf, 4); | |
718 | if (status != 0) | |
719 | goto err; | |
720 | ||
721 | new_so->som_solib.bss_start = extract_unsigned_integer (buf, 4); | |
722 | ||
723 | status = target_read_memory (addr + 28, buf, 4); | |
724 | if (status != 0) | |
725 | goto err; | |
726 | ||
727 | new_so->som_solib.data_end = extract_unsigned_integer (buf, 4); | |
728 | ||
729 | status = target_read_memory (addr + 32, buf, 4); | |
730 | if (status != 0) | |
731 | goto err; | |
732 | ||
733 | new_so->som_solib.got_value = extract_unsigned_integer (buf, 4); | |
734 | ||
735 | status = target_read_memory (addr + 36, buf, 4); | |
736 | if (status != 0) | |
737 | goto err; | |
738 | ||
9a043c1d AC |
739 | /* FIXME: cagney/2003-02-01: I think som_solib.next should be a |
740 | CORE_ADDR. */ | |
8f236061 | 741 | new_so->som_solib.next = |
9a043c1d | 742 | hpux_address_to_host_pointer_hack (extract_unsigned_integer (buf, 4)); |
c906108c SS |
743 | |
744 | /* Note that we don't re-set "addr" to the next pointer | |
745 | * until after we've read the trailing data. | |
746 | */ | |
747 | ||
748 | status = target_read_memory (addr + 40, buf, 4); | |
749 | new_so->som_solib.tsd_start_addr = extract_unsigned_integer (buf, 4); | |
750 | if (status != 0) | |
c5aa993b | 751 | goto err; |
c906108c SS |
752 | |
753 | /* Now indirect via that value! | |
754 | */ | |
755 | status = target_read_memory (new_so->som_solib.tsd_start_addr, buf, 4); | |
756 | new_so->som_solib.tsd_start_addr = extract_unsigned_integer (buf, 4); | |
757 | if (status != 0) | |
c5aa993b | 758 | goto err; |
c906108c | 759 | #ifdef SOLIB_DEBUG |
c5aa993b JM |
760 | printf ("\n+ library \"%s\" is described at 0x%x\n", name, addr); |
761 | printf (" 'version' is %d\n", new_so->som_solib.struct_version); | |
762 | printf (" 'bind_mode' is %d\n", new_so->som_solib.bind_mode); | |
763 | printf (" 'library_version' is %d\n", new_so->som_solib.library_version); | |
764 | printf (" 'text_addr' is 0x%x\n", new_so->som_solib.text_addr); | |
765 | printf (" 'text_link_addr' is 0x%x\n", new_so->som_solib.text_link_addr); | |
766 | printf (" 'text_end' is 0x%x\n", new_so->som_solib.text_end); | |
767 | printf (" 'data_start' is 0x%x\n", new_so->som_solib.data_start); | |
768 | printf (" 'bss_start' is 0x%x\n", new_so->som_solib.bss_start); | |
769 | printf (" 'data_end' is 0x%x\n", new_so->som_solib.data_end); | |
770 | printf (" 'got_value' is %x\n", new_so->som_solib.got_value); | |
771 | printf (" 'next' is 0x%x\n", new_so->som_solib.next); | |
772 | printf (" 'tsd_start_addr' is 0x%x\n", new_so->som_solib.tsd_start_addr); | |
c906108c SS |
773 | #endif |
774 | ||
775 | /* Go on to the next shared library descriptor. | |
776 | */ | |
c5aa993b | 777 | addr = (CORE_ADDR) new_so->som_solib.next; |
c906108c SS |
778 | |
779 | ||
780 | ||
781 | /* At this point, we have essentially hooked the shlib into the | |
782 | "info share" command. However, we haven't yet loaded its | |
783 | symbol table. We must now decide whether we ought to, i.e., | |
784 | whether doing so would exceed the symbol table size threshold. | |
785 | ||
786 | If the threshold has just now been exceeded, then we'll issue | |
787 | a warning message (which explains how to load symbols manually, | |
788 | if the user so desires). | |
789 | ||
790 | If the threshold has just now or previously been exceeded, | |
791 | we'll just add the shlib to the list of object files, but won't | |
792 | actually load its symbols. (This is more useful than it might | |
793 | sound, for it allows us to e.g., still load and use the shlibs' | |
794 | unwind information for stack tracebacks.) | |
c5aa993b | 795 | */ |
c906108c SS |
796 | |
797 | /* Note that we DON'T want to preclude the user from using the | |
798 | add-symbol-file command! Thus, we only worry about the threshold | |
799 | when we're invoked for other reasons. | |
c5aa993b | 800 | */ |
c906108c SS |
801 | st_size = som_solib_sizeof_symbol_table (name); |
802 | som_solib_st_size_threshold_exceeded = | |
c5aa993b | 803 | !from_tty && |
9b3128c4 | 804 | auto_solib_limit > 0 && |
990f9fe3 | 805 | readsyms && |
c3c057c8 | 806 | ((st_size + som_solib_total_st_size) > (auto_solib_limit * (LONGEST) (1024 * 1024))); |
c906108c SS |
807 | |
808 | if (som_solib_st_size_threshold_exceeded) | |
c5aa993b JM |
809 | { |
810 | if (!threshold_warning_given) | |
b7209cb4 | 811 | warning ("Symbols for some libraries have not been loaded, because\ndoing so would exceed the size threshold specified by auto-solib-limit.\nTo manually load symbols, use the 'sharedlibrary' command.\nTo raise the threshold, set auto-solib-limit to a larger value and rerun\nthe program.\n"); |
c5aa993b JM |
812 | threshold_warning_given = 1; |
813 | ||
814 | /* We'll still make note of this shlib, even if we don't | |
815 | read its symbols. This allows us to use its unwind | |
816 | information well enough to know how to e.g., correctly | |
817 | do a traceback from a PC within the shlib, even if we | |
818 | can't symbolize those PCs... | |
819 | */ | |
820 | som_solib_add_solib_objfile (new_so, name, from_tty, text_addr); | |
821 | continue; | |
822 | } | |
c906108c SS |
823 | |
824 | som_solib_total_st_size += st_size; | |
825 | ||
826 | /* This fills in new_so->objfile, among others. */ | |
827 | som_solib_load_symbols (new_so, name, from_tty, text_addr, target); | |
828 | } | |
829 | ||
830 | #ifdef SOLIB_DEBUG | |
c5aa993b | 831 | printf ("--Done reading shared library data\n"); |
c906108c SS |
832 | #endif |
833 | ||
834 | /* Getting new symbols may change our opinion about what is | |
835 | frameless. */ | |
836 | reinit_frame_cache (); | |
837 | return; | |
838 | ||
839 | old_dld: | |
840 | error ("Debugging dynamic executables loaded via the hpux8 dld.sl is not supported.\n"); | |
841 | return; | |
842 | ||
843 | err: | |
844 | error ("Error while reading dynamic library list.\n"); | |
845 | return; | |
846 | } | |
847 | ||
848 | ||
849 | /* This hook gets called just before the first instruction in the | |
850 | inferior process is executed. | |
851 | ||
852 | This is our opportunity to set magic flags in the inferior so | |
853 | that GDB can be notified when a shared library is mapped in and | |
854 | to tell the dynamic linker that a private copy of the library is | |
855 | needed (so GDB can set breakpoints in the library). | |
856 | ||
857 | __dld_flags is the location of the magic flags; as of this implementation | |
858 | there are 3 flags of interest: | |
859 | ||
860 | bit 0 when set indicates that private copies of the libraries are needed | |
861 | bit 1 when set indicates that the callback hook routine is valid | |
862 | bit 2 when set indicates that the dynamic linker should maintain the | |
c5aa993b | 863 | __dld_list structure when loading/unloading libraries. |
c906108c SS |
864 | |
865 | Note that shared libraries are not mapped in at this time, so we have | |
866 | run the inferior until the libraries are mapped in. Typically this | |
867 | means running until the "_start" is called. */ | |
868 | ||
869 | void | |
fba45db2 | 870 | som_solib_create_inferior_hook (void) |
c906108c SS |
871 | { |
872 | struct minimal_symbol *msymbol; | |
873 | unsigned int dld_flags, status, have_endo; | |
874 | asection *shlib_info; | |
875 | char buf[4]; | |
876 | struct objfile *objfile; | |
877 | CORE_ADDR anaddr; | |
878 | ||
879 | /* First, remove all the solib event breakpoints. Their addresses | |
880 | may have changed since the last time we ran the program. */ | |
881 | remove_solib_event_breakpoints (); | |
882 | ||
883 | if (symfile_objfile == NULL) | |
c5aa993b | 884 | return; |
c906108c SS |
885 | |
886 | /* First see if the objfile was dynamically linked. */ | |
887 | shlib_info = bfd_get_section_by_name (symfile_objfile->obfd, "$SHLIB_INFO$"); | |
888 | if (!shlib_info) | |
889 | return; | |
890 | ||
891 | /* It's got a $SHLIB_INFO$ section, make sure it's not empty. */ | |
892 | if (bfd_section_size (symfile_objfile->obfd, shlib_info) == 0) | |
893 | return; | |
894 | ||
895 | have_endo = 0; | |
9b3128c4 JL |
896 | /* Slam the pid of the process into __d_pid. |
897 | ||
898 | We used to warn when this failed, but that warning is only useful | |
899 | on very old HP systems (hpux9 and older). The warnings are an | |
900 | annoyance to users of modern systems and foul up the testsuite as | |
901 | well. As a result, the warnings have been disabled. */ | |
c906108c SS |
902 | msymbol = lookup_minimal_symbol ("__d_pid", NULL, symfile_objfile); |
903 | if (msymbol == NULL) | |
9b3128c4 | 904 | goto keep_going; |
c906108c SS |
905 | |
906 | anaddr = SYMBOL_VALUE_ADDRESS (msymbol); | |
39f77062 | 907 | store_unsigned_integer (buf, 4, PIDGET (inferior_ptid)); |
c906108c SS |
908 | status = target_write_memory (anaddr, buf, 4); |
909 | if (status != 0) | |
910 | { | |
911 | warning ("Unable to write __d_pid"); | |
912 | warning ("Suggest linking with /opt/langtools/lib/end.o."); | |
913 | warning ("GDB will be unable to track shl_load/shl_unload calls"); | |
914 | goto keep_going; | |
915 | } | |
916 | ||
917 | /* Get the value of _DLD_HOOK (an export stub) and put it in __dld_hook; | |
918 | This will force the dynamic linker to call __d_trap when significant | |
919 | events occur. | |
920 | ||
921 | Note that the above is the pre-HP-UX 9.0 behaviour. At 9.0 and above, | |
922 | the dld provides an export stub named "__d_trap" as well as the | |
923 | function named "__d_trap" itself, but doesn't provide "_DLD_HOOK". | |
924 | We'll look first for the old flavor and then the new. | |
c5aa993b | 925 | */ |
c906108c SS |
926 | msymbol = lookup_minimal_symbol ("_DLD_HOOK", NULL, symfile_objfile); |
927 | if (msymbol == NULL) | |
c5aa993b | 928 | msymbol = lookup_minimal_symbol ("__d_trap", NULL, symfile_objfile); |
c906108c SS |
929 | if (msymbol == NULL) |
930 | { | |
931 | warning ("Unable to find _DLD_HOOK symbol in object file."); | |
932 | warning ("Suggest linking with /opt/langtools/lib/end.o."); | |
933 | warning ("GDB will be unable to track shl_load/shl_unload calls"); | |
934 | goto keep_going; | |
935 | } | |
936 | anaddr = SYMBOL_VALUE_ADDRESS (msymbol); | |
937 | dld_cache.hook.address = anaddr; | |
938 | ||
939 | /* Grrr, this might not be an export symbol! We have to find the | |
940 | export stub. */ | |
941 | ALL_OBJFILES (objfile) | |
c5aa993b JM |
942 | { |
943 | struct unwind_table_entry *u; | |
944 | struct minimal_symbol *msymbol2; | |
945 | ||
946 | /* What a crock. */ | |
22abf04a | 947 | msymbol2 = lookup_minimal_symbol_solib_trampoline (DEPRECATED_SYMBOL_NAME (msymbol), |
40324f1b | 948 | objfile); |
c5aa993b JM |
949 | /* Found a symbol with the right name. */ |
950 | if (msymbol2) | |
951 | { | |
952 | struct unwind_table_entry *u; | |
953 | /* It must be a shared library trampoline. */ | |
954 | if (SYMBOL_TYPE (msymbol2) != mst_solib_trampoline) | |
955 | continue; | |
956 | ||
957 | /* It must also be an export stub. */ | |
958 | u = find_unwind_entry (SYMBOL_VALUE (msymbol2)); | |
959 | if (!u || u->stub_unwind.stub_type != EXPORT) | |
960 | continue; | |
961 | ||
962 | /* OK. Looks like the correct import stub. */ | |
963 | anaddr = SYMBOL_VALUE (msymbol2); | |
964 | dld_cache.hook_stub.address = anaddr; | |
965 | } | |
966 | } | |
c906108c SS |
967 | store_unsigned_integer (buf, 4, anaddr); |
968 | ||
969 | msymbol = lookup_minimal_symbol ("__dld_hook", NULL, symfile_objfile); | |
970 | if (msymbol == NULL) | |
971 | { | |
972 | warning ("Unable to find __dld_hook symbol in object file."); | |
973 | warning ("Suggest linking with /opt/langtools/lib/end.o."); | |
974 | warning ("GDB will be unable to track shl_load/shl_unload calls"); | |
975 | goto keep_going; | |
976 | } | |
977 | anaddr = SYMBOL_VALUE_ADDRESS (msymbol); | |
978 | status = target_write_memory (anaddr, buf, 4); | |
c5aa993b | 979 | |
c906108c SS |
980 | /* Now set a shlib_event breakpoint at __d_trap so we can track |
981 | significant shared library events. */ | |
982 | msymbol = lookup_minimal_symbol ("__d_trap", NULL, symfile_objfile); | |
983 | if (msymbol == NULL) | |
984 | { | |
985 | warning ("Unable to find __dld_d_trap symbol in object file."); | |
986 | warning ("Suggest linking with /opt/langtools/lib/end.o."); | |
987 | warning ("GDB will be unable to track shl_load/shl_unload calls"); | |
988 | goto keep_going; | |
989 | } | |
990 | create_solib_event_breakpoint (SYMBOL_VALUE_ADDRESS (msymbol)); | |
991 | ||
992 | /* We have all the support usually found in end.o, so we can track | |
993 | shl_load and shl_unload calls. */ | |
994 | have_endo = 1; | |
995 | ||
996 | keep_going: | |
997 | ||
998 | /* Get the address of __dld_flags, if no such symbol exists, then we can | |
999 | not debug the shared code. */ | |
1000 | msymbol = lookup_minimal_symbol ("__dld_flags", NULL, NULL); | |
1001 | if (msymbol == NULL) | |
1002 | { | |
1003 | error ("Unable to find __dld_flags symbol in object file.\n"); | |
1004 | } | |
1005 | ||
1006 | anaddr = SYMBOL_VALUE_ADDRESS (msymbol); | |
1007 | ||
1008 | /* Read the current contents. */ | |
1009 | status = target_read_memory (anaddr, buf, 4); | |
1010 | if (status != 0) | |
1011 | { | |
1012 | error ("Unable to read __dld_flags\n"); | |
1013 | } | |
1014 | dld_flags = extract_unsigned_integer (buf, 4); | |
1015 | ||
1016 | /* Turn on the flags we care about. */ | |
1017 | dld_flags |= DLD_FLAGS_MAPPRIVATE; | |
1018 | if (have_endo) | |
1019 | dld_flags |= DLD_FLAGS_HOOKVALID; | |
1020 | store_unsigned_integer (buf, 4, dld_flags); | |
1021 | status = target_write_memory (anaddr, buf, 4); | |
1022 | if (status != 0) | |
1023 | { | |
1024 | error ("Unable to write __dld_flags\n"); | |
1025 | } | |
1026 | ||
1027 | /* Now find the address of _start and set a breakpoint there. | |
1028 | We still need this code for two reasons: | |
1029 | ||
c5aa993b JM |
1030 | * Not all sites have /opt/langtools/lib/end.o, so it's not always |
1031 | possible to track the dynamic linker's events. | |
1032 | ||
1033 | * At this time no events are triggered for shared libraries | |
1034 | loaded at startup time (what a crock). */ | |
c906108c | 1035 | |
c906108c SS |
1036 | msymbol = lookup_minimal_symbol ("_start", NULL, symfile_objfile); |
1037 | if (msymbol == NULL) | |
1038 | { | |
1039 | error ("Unable to find _start symbol in object file.\n"); | |
1040 | } | |
1041 | ||
1042 | anaddr = SYMBOL_VALUE_ADDRESS (msymbol); | |
1043 | ||
1044 | /* Make the breakpoint at "_start" a shared library event breakpoint. */ | |
1045 | create_solib_event_breakpoint (anaddr); | |
1046 | ||
1047 | /* Wipe out all knowledge of old shared libraries since their | |
1048 | mapping can change from one exec to another! */ | |
1049 | while (so_list_head) | |
1050 | { | |
1051 | struct so_list *temp; | |
1052 | ||
1053 | temp = so_list_head; | |
b8c9b27d | 1054 | xfree (so_list_head); |
c906108c SS |
1055 | so_list_head = temp->next; |
1056 | } | |
1057 | clear_symtab_users (); | |
1058 | } | |
1059 | ||
c906108c SS |
1060 | /* This operation removes the "hook" between GDB and the dynamic linker, |
1061 | which causes the dld to notify GDB of shared library events. | |
1062 | ||
1063 | After this operation completes, the dld will no longer notify GDB of | |
1064 | shared library events. To resume notifications, GDB must call | |
1065 | som_solib_create_inferior_hook. | |
1066 | ||
1067 | This operation does not remove any knowledge of shared libraries which | |
1068 | GDB may already have been notified of. | |
c5aa993b | 1069 | */ |
c906108c | 1070 | void |
fba45db2 | 1071 | som_solib_remove_inferior_hook (int pid) |
c906108c | 1072 | { |
c5aa993b JM |
1073 | CORE_ADDR addr; |
1074 | struct minimal_symbol *msymbol; | |
1075 | int status; | |
0d99fdb9 | 1076 | char dld_flags_buffer[4]; |
c5aa993b | 1077 | unsigned int dld_flags_value; |
ce696e05 | 1078 | struct cleanup *old_cleanups = save_inferior_ptid (); |
c906108c SS |
1079 | |
1080 | /* Ensure that we're really operating on the specified process. */ | |
39f77062 | 1081 | inferior_ptid = pid_to_ptid (pid); |
c906108c SS |
1082 | |
1083 | /* We won't bother to remove the solib breakpoints from this process. | |
1084 | ||
1085 | In fact, on PA64 the breakpoint is hard-coded into the dld callback, | |
1086 | and thus we're not supposed to remove it. | |
1087 | ||
1088 | Rather, we'll merely clear the dld_flags bit that enables callbacks. | |
c5aa993b | 1089 | */ |
c906108c SS |
1090 | msymbol = lookup_minimal_symbol ("__dld_flags", NULL, NULL); |
1091 | ||
1092 | addr = SYMBOL_VALUE_ADDRESS (msymbol); | |
9ca80cf8 | 1093 | status = target_read_memory (addr, dld_flags_buffer, 4); |
c906108c | 1094 | |
9ca80cf8 | 1095 | dld_flags_value = extract_unsigned_integer (dld_flags_buffer, 4); |
c906108c SS |
1096 | |
1097 | dld_flags_value &= ~DLD_FLAGS_HOOKVALID; | |
9ca80cf8 RC |
1098 | store_unsigned_integer (dld_flags_buffer, 4, dld_flags_value); |
1099 | status = target_write_memory (addr, dld_flags_buffer, 4); | |
c906108c SS |
1100 | |
1101 | do_cleanups (old_cleanups); | |
1102 | } | |
1103 | ||
1104 | ||
1105 | /* This function creates a breakpoint on the dynamic linker hook, which | |
1106 | is called when e.g., a shl_load or shl_unload call is made. This | |
1107 | breakpoint will only trigger when a shl_load call is made. | |
1108 | ||
1109 | If filename is NULL, then loads of any dll will be caught. Else, | |
1110 | only loads of the file whose pathname is the string contained by | |
1111 | filename will be caught. | |
1112 | ||
1113 | Undefined behaviour is guaranteed if this function is called before | |
1114 | som_solib_create_inferior_hook. | |
c5aa993b | 1115 | */ |
c906108c | 1116 | void |
fba45db2 KB |
1117 | som_solib_create_catch_load_hook (int pid, int tempflag, char *filename, |
1118 | char *cond_string) | |
c906108c SS |
1119 | { |
1120 | create_solib_load_event_breakpoint ("__d_trap", tempflag, filename, cond_string); | |
1121 | } | |
1122 | ||
1123 | /* This function creates a breakpoint on the dynamic linker hook, which | |
1124 | is called when e.g., a shl_load or shl_unload call is made. This | |
1125 | breakpoint will only trigger when a shl_unload call is made. | |
1126 | ||
1127 | If filename is NULL, then unloads of any dll will be caught. Else, | |
1128 | only unloads of the file whose pathname is the string contained by | |
1129 | filename will be caught. | |
1130 | ||
1131 | Undefined behaviour is guaranteed if this function is called before | |
1132 | som_solib_create_inferior_hook. | |
c5aa993b | 1133 | */ |
c906108c | 1134 | void |
fba45db2 KB |
1135 | som_solib_create_catch_unload_hook (int pid, int tempflag, char *filename, |
1136 | char *cond_string) | |
c906108c SS |
1137 | { |
1138 | create_solib_unload_event_breakpoint ("__d_trap", tempflag, filename, cond_string); | |
1139 | } | |
1140 | ||
1141 | int | |
fba45db2 | 1142 | som_solib_have_load_event (int pid) |
c906108c | 1143 | { |
c5aa993b | 1144 | CORE_ADDR event_kind; |
c906108c | 1145 | |
34f75cc1 | 1146 | event_kind = read_register (HPPA_ARG0_REGNUM); |
c906108c SS |
1147 | return (event_kind == SHL_LOAD); |
1148 | } | |
1149 | ||
1150 | int | |
fba45db2 | 1151 | som_solib_have_unload_event (int pid) |
c906108c | 1152 | { |
c5aa993b | 1153 | CORE_ADDR event_kind; |
c906108c | 1154 | |
34f75cc1 | 1155 | event_kind = read_register (HPPA_ARG0_REGNUM); |
c906108c SS |
1156 | return (event_kind == SHL_UNLOAD); |
1157 | } | |
1158 | ||
1159 | static char * | |
fba45db2 | 1160 | som_solib_library_pathname (int pid) |
c906108c | 1161 | { |
c5aa993b JM |
1162 | CORE_ADDR dll_handle_address; |
1163 | CORE_ADDR dll_pathname_address; | |
1164 | struct som_solib_mapped_entry dll_descriptor; | |
1165 | char *p; | |
1166 | static char dll_pathname[1024]; | |
c906108c SS |
1167 | |
1168 | /* Read the descriptor of this newly-loaded library. */ | |
34f75cc1 | 1169 | dll_handle_address = read_register (HPPA_ARG1_REGNUM); |
c906108c SS |
1170 | read_memory (dll_handle_address, (char *) &dll_descriptor, sizeof (dll_descriptor)); |
1171 | ||
1172 | /* We can find a pointer to the dll's pathname within the descriptor. */ | |
1173 | dll_pathname_address = (CORE_ADDR) dll_descriptor.name; | |
c5aa993b | 1174 | |
c906108c SS |
1175 | /* Read the pathname, one byte at a time. */ |
1176 | p = dll_pathname; | |
1177 | for (;;) | |
1178 | { | |
c5aa993b | 1179 | char b; |
c906108c SS |
1180 | read_memory (dll_pathname_address++, (char *) &b, 1); |
1181 | *p++ = b; | |
1182 | if (b == '\0') | |
c5aa993b | 1183 | break; |
c906108c SS |
1184 | } |
1185 | ||
1186 | return dll_pathname; | |
1187 | } | |
1188 | ||
1189 | char * | |
fba45db2 | 1190 | som_solib_loaded_library_pathname (int pid) |
c906108c | 1191 | { |
c5aa993b | 1192 | if (!som_solib_have_load_event (pid)) |
c906108c SS |
1193 | error ("Must have a load event to use this query"); |
1194 | ||
1195 | return som_solib_library_pathname (pid); | |
1196 | } | |
1197 | ||
1198 | char * | |
fba45db2 | 1199 | som_solib_unloaded_library_pathname (int pid) |
c906108c | 1200 | { |
c5aa993b | 1201 | if (!som_solib_have_unload_event (pid)) |
c906108c SS |
1202 | error ("Must have an unload event to use this query"); |
1203 | ||
1204 | return som_solib_library_pathname (pid); | |
1205 | } | |
1206 | ||
1207 | static void | |
fba45db2 | 1208 | som_solib_desire_dynamic_linker_symbols (void) |
c906108c SS |
1209 | { |
1210 | struct objfile *objfile; | |
1211 | struct unwind_table_entry *u; | |
c5aa993b | 1212 | struct minimal_symbol *dld_msymbol; |
c906108c SS |
1213 | |
1214 | /* Do we already know the value of these symbols? If so, then | |
1215 | we've no work to do. | |
1216 | ||
1217 | (If you add clauses to this test, be sure to likewise update the | |
1218 | test within the loop.) | |
c5aa993b | 1219 | */ |
c906108c SS |
1220 | if (dld_cache.is_valid) |
1221 | return; | |
1222 | ||
1223 | ALL_OBJFILES (objfile) | |
c5aa993b JM |
1224 | { |
1225 | dld_msymbol = lookup_minimal_symbol ("shl_load", NULL, objfile); | |
1226 | if (dld_msymbol != NULL) | |
1227 | { | |
1228 | dld_cache.load.address = SYMBOL_VALUE (dld_msymbol); | |
1229 | dld_cache.load.unwind = find_unwind_entry (dld_cache.load.address); | |
1230 | } | |
1231 | ||
1232 | dld_msymbol = lookup_minimal_symbol_solib_trampoline ("shl_load", | |
c5aa993b JM |
1233 | objfile); |
1234 | if (dld_msymbol != NULL) | |
1235 | { | |
1236 | if (SYMBOL_TYPE (dld_msymbol) == mst_solib_trampoline) | |
1237 | { | |
1238 | u = find_unwind_entry (SYMBOL_VALUE (dld_msymbol)); | |
1239 | if ((u != NULL) && (u->stub_unwind.stub_type == EXPORT)) | |
1240 | { | |
1241 | dld_cache.load_stub.address = SYMBOL_VALUE (dld_msymbol); | |
1242 | dld_cache.load_stub.unwind = u; | |
1243 | } | |
1244 | } | |
1245 | } | |
1246 | ||
1247 | dld_msymbol = lookup_minimal_symbol ("shl_unload", NULL, objfile); | |
1248 | if (dld_msymbol != NULL) | |
1249 | { | |
1250 | dld_cache.unload.address = SYMBOL_VALUE (dld_msymbol); | |
1251 | dld_cache.unload.unwind = find_unwind_entry (dld_cache.unload.address); | |
1252 | ||
1253 | /* ??rehrauer: I'm not sure exactly what this is, but it appears | |
1254 | that on some HPUX 10.x versions, there's two unwind regions to | |
1255 | cover the body of "shl_unload", the second being 4 bytes past | |
1256 | the end of the first. This is a large hack to handle that | |
1257 | case, but since I don't seem to have any legitimate way to | |
1258 | look for this thing via the symbol table... | |
1259 | */ | |
1260 | if (dld_cache.unload.unwind != NULL) | |
1261 | { | |
1262 | u = find_unwind_entry (dld_cache.unload.unwind->region_end + 4); | |
1263 | if (u != NULL) | |
1264 | { | |
1265 | dld_cache.unload2.address = u->region_start; | |
1266 | dld_cache.unload2.unwind = u; | |
1267 | } | |
1268 | } | |
1269 | } | |
1270 | ||
1271 | dld_msymbol = lookup_minimal_symbol_solib_trampoline ("shl_unload", | |
c5aa993b JM |
1272 | objfile); |
1273 | if (dld_msymbol != NULL) | |
1274 | { | |
1275 | if (SYMBOL_TYPE (dld_msymbol) == mst_solib_trampoline) | |
1276 | { | |
1277 | u = find_unwind_entry (SYMBOL_VALUE (dld_msymbol)); | |
1278 | if ((u != NULL) && (u->stub_unwind.stub_type == EXPORT)) | |
1279 | { | |
1280 | dld_cache.unload_stub.address = SYMBOL_VALUE (dld_msymbol); | |
1281 | dld_cache.unload_stub.unwind = u; | |
1282 | } | |
1283 | } | |
1284 | } | |
1285 | ||
1286 | /* Did we find everything we were looking for? If so, stop. */ | |
8f236061 AC |
1287 | if ((dld_cache.load.address != 0) |
1288 | && (dld_cache.load_stub.address != 0) | |
1289 | && (dld_cache.unload.address != 0) | |
1290 | && (dld_cache.unload_stub.address != 0)) | |
c5aa993b JM |
1291 | { |
1292 | dld_cache.is_valid = 1; | |
1293 | break; | |
1294 | } | |
1295 | } | |
c906108c SS |
1296 | |
1297 | dld_cache.hook.unwind = find_unwind_entry (dld_cache.hook.address); | |
1298 | dld_cache.hook_stub.unwind = find_unwind_entry (dld_cache.hook_stub.address); | |
1299 | ||
1300 | /* We're prepared not to find some of these symbols, which is why | |
1301 | this function is a "desire" operation, and not a "require". | |
c5aa993b | 1302 | */ |
c906108c SS |
1303 | } |
1304 | ||
1305 | int | |
fba45db2 | 1306 | som_solib_in_dynamic_linker (int pid, CORE_ADDR pc) |
c906108c | 1307 | { |
c5aa993b | 1308 | struct unwind_table_entry *u_pc; |
c906108c SS |
1309 | |
1310 | /* Are we in the dld itself? | |
1311 | ||
1312 | ??rehrauer: Large hack -- We'll assume that any address in a | |
1313 | shared text region is the dld's text. This would obviously | |
1314 | fall down if the user attached to a process, whose shlibs | |
1315 | weren't mapped to a (writeable) private region. However, in | |
1316 | that case the debugger probably isn't able to set the fundamental | |
1317 | breakpoint in the dld callback anyways, so this hack should be | |
1318 | safe. | |
c5aa993b | 1319 | */ |
c906108c SS |
1320 | if ((pc & (CORE_ADDR) 0xc0000000) == (CORE_ADDR) 0xc0000000) |
1321 | return 1; | |
1322 | ||
1323 | /* Cache the address of some symbols that are part of the dynamic | |
1324 | linker, if not already known. | |
c5aa993b | 1325 | */ |
c906108c SS |
1326 | som_solib_desire_dynamic_linker_symbols (); |
1327 | ||
1328 | /* Are we in the dld callback? Or its export stub? */ | |
1329 | u_pc = find_unwind_entry (pc); | |
1330 | if (u_pc == NULL) | |
1331 | return 0; | |
1332 | ||
1333 | if ((u_pc == dld_cache.hook.unwind) || (u_pc == dld_cache.hook_stub.unwind)) | |
1334 | return 1; | |
1335 | ||
1336 | /* Or the interface of the dld (i.e., "shl_load" or friends)? */ | |
1337 | if ((u_pc == dld_cache.load.unwind) | |
1338 | || (u_pc == dld_cache.unload.unwind) | |
1339 | || (u_pc == dld_cache.unload2.unwind) | |
1340 | || (u_pc == dld_cache.load_stub.unwind) | |
1341 | || (u_pc == dld_cache.unload_stub.unwind)) | |
1342 | return 1; | |
1343 | ||
1344 | /* Apparently this address isn't part of the dld's text. */ | |
1345 | return 0; | |
1346 | } | |
1347 | ||
1348 | ||
1349 | /* Return the GOT value for the shared library in which ADDR belongs. If | |
1350 | ADDR isn't in any known shared library, return zero. */ | |
1351 | ||
1352 | CORE_ADDR | |
fba45db2 | 1353 | som_solib_get_got_by_pc (CORE_ADDR addr) |
c906108c SS |
1354 | { |
1355 | struct so_list *so_list = so_list_head; | |
1356 | CORE_ADDR got_value = 0; | |
1357 | ||
1358 | while (so_list) | |
1359 | { | |
1360 | if (so_list->som_solib.text_addr <= addr | |
1361 | && so_list->som_solib.text_end > addr) | |
1362 | { | |
1363 | got_value = so_list->som_solib.got_value; | |
1364 | break; | |
1365 | } | |
1366 | so_list = so_list->next; | |
1367 | } | |
1368 | return got_value; | |
1369 | } | |
1370 | ||
1371 | /* elz: | |
1372 | Return the address of the handle of the shared library | |
1373 | in which ADDR belongs. If | |
1374 | ADDR isn't in any known shared library, return zero. */ | |
c5aa993b | 1375 | /* this function is used in hppa_fix_call_dummy in hppa-tdep.c */ |
c906108c SS |
1376 | |
1377 | CORE_ADDR | |
fba45db2 | 1378 | som_solib_get_solib_by_pc (CORE_ADDR addr) |
c906108c SS |
1379 | { |
1380 | struct so_list *so_list = so_list_head; | |
1381 | ||
1382 | while (so_list) | |
1383 | { | |
1384 | if (so_list->som_solib.text_addr <= addr | |
1385 | && so_list->som_solib.text_end > addr) | |
c5aa993b | 1386 | { |
c906108c | 1387 | break; |
c5aa993b | 1388 | } |
c906108c SS |
1389 | so_list = so_list->next; |
1390 | } | |
1391 | if (so_list) | |
c5aa993b | 1392 | return so_list->solib_addr; |
c906108c | 1393 | else |
c5aa993b | 1394 | return 0; |
c906108c SS |
1395 | } |
1396 | ||
1397 | ||
1398 | int | |
fba45db2 KB |
1399 | som_solib_section_offsets (struct objfile *objfile, |
1400 | struct section_offsets *offsets) | |
c906108c SS |
1401 | { |
1402 | struct so_list *so_list = so_list_head; | |
1403 | ||
1404 | while (so_list) | |
1405 | { | |
1406 | /* Oh what a pain! We need the offsets before so_list->objfile | |
c5aa993b | 1407 | is valid. The BFDs will never match. Make a best guess. */ |
c906108c SS |
1408 | if (strstr (objfile->name, so_list->som_solib.name)) |
1409 | { | |
1410 | asection *private_section; | |
1411 | ||
1412 | /* The text offset is easy. */ | |
f0a58b0b | 1413 | offsets->offsets[SECT_OFF_TEXT (objfile)] |
c906108c SS |
1414 | = (so_list->som_solib.text_addr |
1415 | - so_list->som_solib.text_link_addr); | |
f0a58b0b | 1416 | offsets->offsets[SECT_OFF_RODATA (objfile)] |
b8fbeb18 | 1417 | = ANOFFSET (offsets, SECT_OFF_TEXT (objfile)); |
c906108c SS |
1418 | |
1419 | /* We should look at presumed_dp in the SOM header, but | |
1420 | that's not easily available. This should be OK though. */ | |
1421 | private_section = bfd_get_section_by_name (objfile->obfd, | |
1422 | "$PRIVATE$"); | |
1423 | if (!private_section) | |
1424 | { | |
1425 | warning ("Unable to find $PRIVATE$ in shared library!"); | |
f0a58b0b EZ |
1426 | offsets->offsets[SECT_OFF_DATA (objfile)] = 0; |
1427 | offsets->offsets[SECT_OFF_BSS (objfile)] = 0; | |
c906108c SS |
1428 | return 1; |
1429 | } | |
f0a58b0b | 1430 | offsets->offsets[SECT_OFF_DATA (objfile)] |
c906108c | 1431 | = (so_list->som_solib.data_start - private_section->vma); |
f0a58b0b | 1432 | offsets->offsets[SECT_OFF_BSS (objfile)] |
b8fbeb18 | 1433 | = ANOFFSET (offsets, SECT_OFF_DATA (objfile)); |
c906108c SS |
1434 | return 1; |
1435 | } | |
1436 | so_list = so_list->next; | |
1437 | } | |
1438 | return 0; | |
1439 | } | |
1440 | ||
1441 | /* Dump information about all the currently loaded shared libraries. */ | |
1442 | ||
1443 | static void | |
fba45db2 | 1444 | som_sharedlibrary_info_command (char *ignore, int from_tty) |
c906108c SS |
1445 | { |
1446 | struct so_list *so_list = so_list_head; | |
1447 | ||
1448 | if (exec_bfd == NULL) | |
1449 | { | |
4ce44c66 | 1450 | printf_unfiltered ("No executable file.\n"); |
c906108c SS |
1451 | return; |
1452 | } | |
1453 | ||
1454 | if (so_list == NULL) | |
1455 | { | |
1456 | printf_unfiltered ("No shared libraries loaded at this time.\n"); | |
1457 | return; | |
1458 | } | |
1459 | ||
1460 | printf_unfiltered ("Shared Object Libraries\n"); | |
1461 | printf_unfiltered (" %-12s%-12s%-12s%-12s%-12s%-12s\n", | |
c5aa993b | 1462 | " flags", " tstart", " tend", " dstart", " dend", " dlt"); |
c906108c SS |
1463 | while (so_list) |
1464 | { | |
1465 | unsigned int flags; | |
1466 | ||
1467 | flags = so_list->som_solib.struct_version << 24; | |
1468 | flags |= so_list->som_solib.bind_mode << 16; | |
1469 | flags |= so_list->som_solib.library_version; | |
1470 | printf_unfiltered ("%s", so_list->som_solib.name); | |
1471 | if (so_list->objfile == NULL) | |
c5aa993b | 1472 | printf_unfiltered (" (symbols not loaded)"); |
c906108c | 1473 | printf_unfiltered ("\n"); |
bb599908 | 1474 | printf_unfiltered (" %-12s", hex_string_custom (flags, 8)); |
c906108c | 1475 | printf_unfiltered ("%-12s", |
bb599908 | 1476 | hex_string_custom (so_list->som_solib.text_addr, 8)); |
c906108c | 1477 | printf_unfiltered ("%-12s", |
bb599908 | 1478 | hex_string_custom (so_list->som_solib.text_end, 8)); |
c906108c | 1479 | printf_unfiltered ("%-12s", |
bb599908 | 1480 | hex_string_custom (so_list->som_solib.data_start, 8)); |
c906108c | 1481 | printf_unfiltered ("%-12s", |
bb599908 | 1482 | hex_string_custom (so_list->som_solib.data_end, 8)); |
c906108c | 1483 | printf_unfiltered ("%-12s\n", |
bb599908 | 1484 | hex_string_custom (so_list->som_solib.got_value, 8)); |
c906108c SS |
1485 | so_list = so_list->next; |
1486 | } | |
1487 | } | |
1488 | ||
1489 | static void | |
fba45db2 | 1490 | som_solib_sharedlibrary_command (char *args, int from_tty) |
c906108c SS |
1491 | { |
1492 | dont_repeat (); | |
990f9fe3 | 1493 | som_solib_add (args, from_tty, (struct target_ops *) 0, 1); |
c906108c SS |
1494 | } |
1495 | ||
1496 | ||
1497 | ||
1498 | char * | |
fba45db2 | 1499 | som_solib_address (CORE_ADDR addr) |
c906108c | 1500 | { |
c5aa993b | 1501 | struct so_list *so = so_list_head; |
c906108c SS |
1502 | |
1503 | while (so) | |
1504 | { | |
1505 | /* Is this address within this shlib's text range? If so, | |
1506 | return the shlib's name. | |
c5aa993b | 1507 | */ |
c906108c | 1508 | if ((addr >= so->som_solib.text_addr) && (addr <= so->som_solib.text_end)) |
c5aa993b | 1509 | return so->som_solib.name; |
c906108c SS |
1510 | |
1511 | /* Nope, keep looking... */ | |
1512 | so = so->next; | |
1513 | } | |
1514 | ||
1515 | /* No, we couldn't prove that the address is within a shlib. */ | |
1516 | return NULL; | |
1517 | } | |
1518 | ||
1519 | ||
1520 | void | |
fba45db2 | 1521 | som_solib_restart (void) |
c906108c | 1522 | { |
c5aa993b | 1523 | struct so_list *sl = so_list_head; |
c906108c SS |
1524 | |
1525 | /* Before the shlib info vanishes, use it to disable any breakpoints | |
1526 | that may still be active in those shlibs. | |
c5aa993b | 1527 | */ |
c906108c SS |
1528 | disable_breakpoints_in_shlibs (0); |
1529 | ||
1530 | /* Discard all the shlib descriptors. | |
c5aa993b | 1531 | */ |
c906108c SS |
1532 | while (sl) |
1533 | { | |
c5aa993b | 1534 | struct so_list *next_sl = sl->next; |
b8c9b27d | 1535 | xfree (sl); |
c906108c SS |
1536 | sl = next_sl; |
1537 | } | |
1538 | so_list_head = NULL; | |
1539 | ||
1540 | som_solib_total_st_size = (LONGEST) 0; | |
1541 | som_solib_st_size_threshold_exceeded = 0; | |
1542 | ||
1543 | dld_cache.is_valid = 0; | |
1544 | ||
1545 | dld_cache.hook.address = 0; | |
1546 | dld_cache.hook.unwind = NULL; | |
1547 | ||
1548 | dld_cache.hook_stub.address = 0; | |
1549 | dld_cache.hook_stub.unwind = NULL; | |
1550 | ||
1551 | dld_cache.load.address = 0; | |
1552 | dld_cache.load.unwind = NULL; | |
1553 | ||
1554 | dld_cache.load_stub.address = 0; | |
1555 | dld_cache.load_stub.unwind = NULL; | |
1556 | ||
1557 | dld_cache.unload.address = 0; | |
1558 | dld_cache.unload.unwind = NULL; | |
1559 | ||
1560 | dld_cache.unload2.address = 0; | |
1561 | dld_cache.unload2.unwind = NULL; | |
1562 | ||
1563 | dld_cache.unload_stub.address = 0; | |
1564 | dld_cache.unload_stub.unwind = NULL; | |
1565 | } | |
1566 | ||
1567 | ||
c906108c | 1568 | void |
fba45db2 | 1569 | _initialize_som_solib (void) |
c906108c SS |
1570 | { |
1571 | add_com ("sharedlibrary", class_files, som_solib_sharedlibrary_command, | |
c5aa993b | 1572 | "Load shared object library symbols for files matching REGEXP."); |
c906108c SS |
1573 | add_info ("sharedlibrary", som_sharedlibrary_info_command, |
1574 | "Status of loaded shared object libraries."); | |
b7209cb4 | 1575 | |
cb1a6d5f | 1576 | deprecated_add_show_from_set |
b7209cb4 | 1577 | (add_set_cmd ("auto-solib-add", class_support, var_boolean, |
c906108c | 1578 | (char *) &auto_solib_add, |
b7209cb4 FF |
1579 | "Set autoloading of shared library symbols.\n\ |
1580 | If \"on\", symbols from all shared object libraries will be loaded\n\ | |
1581 | automatically when the inferior begins execution, when the dynamic linker\n\ | |
1582 | informs gdb that a new library has been loaded, or when attaching to the\n\ | |
1583 | inferior. Otherwise, symbols must be loaded manually, using `sharedlibrary'.", | |
c906108c SS |
1584 | &setlist), |
1585 | &showlist); | |
1586 | ||
cb1a6d5f | 1587 | deprecated_add_show_from_set |
b7209cb4 FF |
1588 | (add_set_cmd ("auto-solib-limit", class_support, var_zinteger, |
1589 | (char *) &auto_solib_limit, | |
1590 | "Set threshold (in Mb) for autoloading shared library symbols.\n\ | |
1591 | When shared library autoloading is enabled, new libraries will be loaded\n\ | |
1592 | only until the total size of shared library symbols exceeds this\n\ | |
1593 | threshold in megabytes. Is ignored when using `sharedlibrary'.", | |
1594 | &setlist), | |
1595 | &showlist); | |
1596 | ||
1597 | /* ??rehrauer: On HP-UX, the kernel parameter MAXDSIZ limits how | |
1598 | much data space a process can use. We ought to be reading | |
1599 | MAXDSIZ and setting auto_solib_limit to some large fraction of | |
1600 | that value. If not that, we maybe ought to be setting it smaller | |
1601 | than the default for MAXDSIZ (that being 64Mb, I believe). | |
1602 | However, [1] this threshold is only crudely approximated rather | |
1603 | than actually measured, and [2] 50 Mbytes is too small for | |
1604 | debugging gdb itself. Thus, the arbitrary 100 figure. */ | |
1605 | auto_solib_limit = 100; /* Megabytes */ | |
c906108c SS |
1606 | |
1607 | som_solib_restart (); | |
1608 | } | |
1609 | ||
1610 | /* Get some HPUX-specific data from a shared lib. | |
1611 | */ | |
1612 | CORE_ADDR | |
89676665 | 1613 | som_solib_thread_start_addr (struct so_list *so) |
c906108c | 1614 | { |
c5aa993b | 1615 | return so->som_solib.tsd_start_addr; |
c906108c | 1616 | } |