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); |
8a3fe4f8 | 240 | error (_("\"%s\": can't open to read symbols: %s."), filename, |
c906108c SS |
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); |
8a3fe4f8 | 248 | error (_("\"%s\": can't read symbols: %s."), filename, |
c906108c SS |
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 | { | |
8a3fe4f8 | 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 | 363 | { |
8a3fe4f8 | 364 | error (_("Unable to build section table for shared library\n.")); |
c906108c SS |
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 | 444 | { |
8a3fe4f8 | 445 | error (_("Invalid regexp: %s"), re_err); |
c906108c SS |
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) | |
8a3fe4f8 | 472 | error (_("Unable to find __dld_flags symbol in object file.")); |
c906108c SS |
473 | |
474 | addr = SYMBOL_VALUE_ADDRESS (msymbol); | |
475 | /* Read the current contents. */ | |
476 | status = target_read_memory (addr, buf, 4); | |
477 | if (status != 0) | |
8a3fe4f8 | 478 | error (_("Unable to read __dld_flags.")); |
c906108c SS |
479 | dld_flags = extract_unsigned_integer (buf, 4); |
480 | ||
481 | /* __dld_list may not be valid. If not, then we punt, warning the user if | |
482 | we were called as a result of the add-symfile command. | |
c5aa993b | 483 | */ |
c906108c SS |
484 | if ((dld_flags & DLD_FLAGS_LISTVALID) == 0) |
485 | { | |
486 | if (from_tty) | |
8a3fe4f8 | 487 | error (_("__dld_list is not valid according to __dld_flags.")); |
c906108c SS |
488 | return; |
489 | } | |
490 | ||
491 | /* If the libraries were not mapped private, warn the user. */ | |
492 | if ((dld_flags & DLD_FLAGS_MAPPRIVATE) == 0) | |
8a3fe4f8 AC |
493 | warning (_("\ |
494 | The shared libraries were not privately mapped; setting a breakpoint\n\ | |
495 | in a shared library will not work until you rerun the program.")); | |
c906108c SS |
496 | |
497 | msymbol = lookup_minimal_symbol ("__dld_list", NULL, NULL); | |
498 | if (!msymbol) | |
499 | { | |
500 | /* Older crt0.o files (hpux8) don't have __dld_list as a symbol, | |
c5aa993b | 501 | but the data is still available if you know where to look. */ |
c906108c SS |
502 | msymbol = lookup_minimal_symbol ("__dld_flags", NULL, NULL); |
503 | if (!msymbol) | |
8a3fe4f8 | 504 | error (_("Unable to find dynamic library list.")); |
c906108c SS |
505 | addr = SYMBOL_VALUE_ADDRESS (msymbol) - 8; |
506 | } | |
507 | else | |
508 | addr = SYMBOL_VALUE_ADDRESS (msymbol); | |
509 | ||
510 | status = target_read_memory (addr, buf, 4); | |
511 | if (status != 0) | |
8a3fe4f8 | 512 | error (_("Unable to find dynamic library list.")); |
c906108c SS |
513 | |
514 | addr = extract_unsigned_integer (buf, 4); | |
515 | ||
516 | /* If addr is zero, then we're using an old dynamic loader which | |
517 | doesn't maintain __dld_list. We'll have to use a completely | |
518 | different approach to get shared library information. */ | |
519 | if (addr == 0) | |
520 | goto old_dld; | |
521 | ||
522 | /* Using the information in __dld_list is the preferred method | |
523 | to get at shared library information. It doesn't depend on | |
524 | any functions in /opt/langtools/lib/end.o and has a chance of working | |
525 | with hpux10 when it is released. */ | |
526 | status = target_read_memory (addr, buf, 4); | |
527 | if (status != 0) | |
8a3fe4f8 | 528 | error (_("Unable to find dynamic library list.")); |
c906108c SS |
529 | |
530 | /* addr now holds the address of the first entry in the dynamic | |
531 | library list. */ | |
532 | addr = extract_unsigned_integer (buf, 4); | |
533 | ||
534 | /* Now that we have a pointer to the dynamic library list, walk | |
535 | through it and add the symbols for each library. */ | |
536 | ||
537 | so_list_tail = so_list_head; | |
538 | /* Find the end of the list of shared objects. */ | |
539 | while (so_list_tail && so_list_tail->next) | |
540 | so_list_tail = so_list_tail->next; | |
541 | ||
542 | #ifdef SOLIB_DEBUG | |
c5aa993b | 543 | printf ("--About to read shared library list data\n"); |
c906108c SS |
544 | #endif |
545 | ||
546 | /* "addr" will always point to the base of the | |
547 | * current data entry describing the current | |
548 | * shared library. | |
549 | */ | |
550 | while (1) | |
551 | { | |
552 | CORE_ADDR name_addr, text_addr; | |
553 | unsigned int name_len; | |
554 | char *name; | |
555 | struct so_list *new_so; | |
556 | struct so_list *so_list = so_list_head; | |
557 | struct stat statbuf; | |
c5aa993b JM |
558 | LONGEST st_size; |
559 | int is_main_program; | |
c906108c SS |
560 | |
561 | if (addr == 0) | |
562 | break; | |
563 | ||
564 | /* Get a pointer to the name of this library. */ | |
565 | status = target_read_memory (addr, buf, 4); | |
566 | if (status != 0) | |
567 | goto err; | |
568 | ||
569 | name_addr = extract_unsigned_integer (buf, 4); | |
570 | name_len = 0; | |
571 | while (1) | |
572 | { | |
573 | target_read_memory (name_addr + name_len, buf, 1); | |
574 | if (status != 0) | |
575 | goto err; | |
576 | ||
577 | name_len++; | |
578 | if (*buf == '\0') | |
579 | break; | |
580 | } | |
581 | name = alloca (name_len); | |
582 | status = target_read_memory (name_addr, name, name_len); | |
583 | if (status != 0) | |
584 | goto err; | |
585 | ||
586 | /* See if we've already loaded something with this name. */ | |
587 | while (so_list) | |
588 | { | |
589 | if (!strcmp (so_list->som_solib.name, name)) | |
590 | break; | |
591 | so_list = so_list->next; | |
592 | } | |
593 | ||
594 | /* See if the file exists. If not, give a warning, but don't | |
c5aa993b | 595 | die. */ |
c906108c SS |
596 | status = stat (name, &statbuf); |
597 | if (status == -1) | |
598 | { | |
8a3fe4f8 | 599 | warning (_("Can't find file %s referenced in dld_list."), name); |
c906108c SS |
600 | |
601 | status = target_read_memory (addr + 36, buf, 4); | |
602 | if (status != 0) | |
603 | goto err; | |
604 | ||
c5aa993b | 605 | addr = (CORE_ADDR) extract_unsigned_integer (buf, 4); |
c906108c SS |
606 | continue; |
607 | } | |
608 | ||
609 | /* If we've already loaded this one or it's the main program, skip it. */ | |
610 | is_main_program = (strcmp (name, symfile_objfile->name) == 0); | |
611 | if (so_list || is_main_program) | |
612 | { | |
c5aa993b JM |
613 | /* This is the "next" pointer in the strcuture. |
614 | */ | |
c906108c SS |
615 | status = target_read_memory (addr + 36, buf, 4); |
616 | if (status != 0) | |
617 | goto err; | |
618 | ||
619 | addr = (CORE_ADDR) extract_unsigned_integer (buf, 4); | |
620 | ||
c5aa993b JM |
621 | /* Record the main program's symbol table size. */ |
622 | if (is_main_program && !so_list) | |
623 | { | |
624 | st_size = som_solib_sizeof_symbol_table (name); | |
625 | som_solib_total_st_size += st_size; | |
626 | } | |
627 | ||
628 | /* Was this a shlib that we noted but didn't load the symbols for? | |
629 | If so, were we invoked this time from the command-line, via | |
630 | a 'sharedlibrary' or 'add-symbol-file' command? If yes to | |
631 | both, we'd better load the symbols this time. | |
632 | */ | |
633 | if (from_tty && so_list && !is_main_program && (so_list->objfile == NULL)) | |
634 | som_solib_load_symbols (so_list, | |
635 | name, | |
636 | from_tty, | |
637 | so_list->som_solib.text_addr, | |
638 | target); | |
c906108c SS |
639 | |
640 | continue; | |
641 | } | |
642 | ||
643 | name = obsavestring (name, name_len - 1, | |
4a146b47 | 644 | &symfile_objfile->objfile_obstack); |
c906108c SS |
645 | |
646 | status = target_read_memory (addr + 8, buf, 4); | |
647 | if (status != 0) | |
648 | goto err; | |
649 | ||
650 | text_addr = extract_unsigned_integer (buf, 4); | |
651 | ||
652 | new_so = (struct so_list *) xmalloc (sizeof (struct so_list)); | |
c5aa993b | 653 | memset ((char *) new_so, 0, sizeof (struct so_list)); |
c906108c SS |
654 | if (so_list_head == NULL) |
655 | { | |
656 | so_list_head = new_so; | |
657 | so_list_tail = new_so; | |
658 | } | |
659 | else | |
660 | { | |
661 | so_list_tail->next = new_so; | |
662 | so_list_tail = new_so; | |
663 | } | |
664 | ||
665 | /* Fill in all the entries in GDB's shared library list. | |
666 | */ | |
c5aa993b | 667 | |
c906108c SS |
668 | new_so->solib_addr = addr; |
669 | new_so->som_solib.name = name; | |
670 | status = target_read_memory (addr + 4, buf, 4); | |
671 | if (status != 0) | |
672 | goto err; | |
673 | ||
674 | new_so->som_solib.struct_version = extract_unsigned_integer (buf + 3, 1); | |
675 | new_so->som_solib.bind_mode = extract_unsigned_integer (buf + 2, 1); | |
c5aa993b JM |
676 | /* Following is "high water mark", highest version number |
677 | * seen, rather than plain version number. | |
678 | */ | |
c906108c SS |
679 | new_so->som_solib.library_version = extract_unsigned_integer (buf, 2); |
680 | new_so->som_solib.text_addr = text_addr; | |
681 | ||
c5aa993b JM |
682 | /* Q: What about longword at "addr + 8"? |
683 | * A: It's read above, out of order, into "text_addr". | |
684 | */ | |
c906108c SS |
685 | |
686 | status = target_read_memory (addr + 12, buf, 4); | |
687 | if (status != 0) | |
688 | goto err; | |
689 | ||
690 | new_so->som_solib.text_link_addr = extract_unsigned_integer (buf, 4); | |
691 | ||
692 | status = target_read_memory (addr + 16, buf, 4); | |
693 | if (status != 0) | |
694 | goto err; | |
695 | ||
696 | new_so->som_solib.text_end = extract_unsigned_integer (buf, 4); | |
697 | ||
698 | status = target_read_memory (addr + 20, buf, 4); | |
699 | if (status != 0) | |
700 | goto err; | |
701 | ||
702 | new_so->som_solib.data_start = extract_unsigned_integer (buf, 4); | |
703 | ||
704 | status = target_read_memory (addr + 24, buf, 4); | |
705 | if (status != 0) | |
706 | goto err; | |
707 | ||
708 | new_so->som_solib.bss_start = extract_unsigned_integer (buf, 4); | |
709 | ||
710 | status = target_read_memory (addr + 28, buf, 4); | |
711 | if (status != 0) | |
712 | goto err; | |
713 | ||
714 | new_so->som_solib.data_end = extract_unsigned_integer (buf, 4); | |
715 | ||
716 | status = target_read_memory (addr + 32, buf, 4); | |
717 | if (status != 0) | |
718 | goto err; | |
719 | ||
720 | new_so->som_solib.got_value = extract_unsigned_integer (buf, 4); | |
721 | ||
722 | status = target_read_memory (addr + 36, buf, 4); | |
723 | if (status != 0) | |
724 | goto err; | |
725 | ||
9a043c1d AC |
726 | /* FIXME: cagney/2003-02-01: I think som_solib.next should be a |
727 | CORE_ADDR. */ | |
8f236061 | 728 | new_so->som_solib.next = |
9a043c1d | 729 | hpux_address_to_host_pointer_hack (extract_unsigned_integer (buf, 4)); |
c906108c SS |
730 | |
731 | /* Note that we don't re-set "addr" to the next pointer | |
732 | * until after we've read the trailing data. | |
733 | */ | |
734 | ||
735 | status = target_read_memory (addr + 40, buf, 4); | |
736 | new_so->som_solib.tsd_start_addr = extract_unsigned_integer (buf, 4); | |
737 | if (status != 0) | |
c5aa993b | 738 | goto err; |
c906108c SS |
739 | |
740 | /* Now indirect via that value! | |
741 | */ | |
742 | status = target_read_memory (new_so->som_solib.tsd_start_addr, buf, 4); | |
743 | new_so->som_solib.tsd_start_addr = extract_unsigned_integer (buf, 4); | |
744 | if (status != 0) | |
c5aa993b | 745 | goto err; |
c906108c | 746 | #ifdef SOLIB_DEBUG |
c5aa993b JM |
747 | printf ("\n+ library \"%s\" is described at 0x%x\n", name, addr); |
748 | printf (" 'version' is %d\n", new_so->som_solib.struct_version); | |
749 | printf (" 'bind_mode' is %d\n", new_so->som_solib.bind_mode); | |
750 | printf (" 'library_version' is %d\n", new_so->som_solib.library_version); | |
751 | printf (" 'text_addr' is 0x%x\n", new_so->som_solib.text_addr); | |
752 | printf (" 'text_link_addr' is 0x%x\n", new_so->som_solib.text_link_addr); | |
753 | printf (" 'text_end' is 0x%x\n", new_so->som_solib.text_end); | |
754 | printf (" 'data_start' is 0x%x\n", new_so->som_solib.data_start); | |
755 | printf (" 'bss_start' is 0x%x\n", new_so->som_solib.bss_start); | |
756 | printf (" 'data_end' is 0x%x\n", new_so->som_solib.data_end); | |
757 | printf (" 'got_value' is %x\n", new_so->som_solib.got_value); | |
758 | printf (" 'next' is 0x%x\n", new_so->som_solib.next); | |
759 | printf (" 'tsd_start_addr' is 0x%x\n", new_so->som_solib.tsd_start_addr); | |
c906108c SS |
760 | #endif |
761 | ||
762 | /* Go on to the next shared library descriptor. | |
763 | */ | |
c5aa993b | 764 | addr = (CORE_ADDR) new_so->som_solib.next; |
c906108c SS |
765 | |
766 | ||
767 | ||
768 | /* At this point, we have essentially hooked the shlib into the | |
769 | "info share" command. However, we haven't yet loaded its | |
770 | symbol table. We must now decide whether we ought to, i.e., | |
771 | whether doing so would exceed the symbol table size threshold. | |
772 | ||
773 | If the threshold has just now been exceeded, then we'll issue | |
774 | a warning message (which explains how to load symbols manually, | |
775 | if the user so desires). | |
776 | ||
777 | If the threshold has just now or previously been exceeded, | |
778 | we'll just add the shlib to the list of object files, but won't | |
779 | actually load its symbols. (This is more useful than it might | |
780 | sound, for it allows us to e.g., still load and use the shlibs' | |
781 | unwind information for stack tracebacks.) | |
c5aa993b | 782 | */ |
c906108c SS |
783 | |
784 | /* Note that we DON'T want to preclude the user from using the | |
785 | add-symbol-file command! Thus, we only worry about the threshold | |
786 | when we're invoked for other reasons. | |
c5aa993b | 787 | */ |
c906108c SS |
788 | st_size = som_solib_sizeof_symbol_table (name); |
789 | som_solib_st_size_threshold_exceeded = | |
c5aa993b | 790 | !from_tty && |
9b3128c4 | 791 | auto_solib_limit > 0 && |
990f9fe3 | 792 | readsyms && |
c3c057c8 | 793 | ((st_size + som_solib_total_st_size) > (auto_solib_limit * (LONGEST) (1024 * 1024))); |
c906108c SS |
794 | |
795 | if (som_solib_st_size_threshold_exceeded) | |
c5aa993b JM |
796 | { |
797 | if (!threshold_warning_given) | |
8a3fe4f8 AC |
798 | warning (_("\ |
799 | Symbols for some libraries have not been loaded, because doing so would\n\ | |
800 | exceed the size threshold specified by auto-solib-limit.\n\ | |
801 | To manually load symbols, use the 'sharedlibrary' command.\n\ | |
802 | To raise the threshold, set auto-solib-limit to a larger value and rerun\n\ | |
803 | the program.")); | |
c5aa993b JM |
804 | threshold_warning_given = 1; |
805 | ||
806 | /* We'll still make note of this shlib, even if we don't | |
807 | read its symbols. This allows us to use its unwind | |
808 | information well enough to know how to e.g., correctly | |
809 | do a traceback from a PC within the shlib, even if we | |
810 | can't symbolize those PCs... | |
811 | */ | |
812 | som_solib_add_solib_objfile (new_so, name, from_tty, text_addr); | |
813 | continue; | |
814 | } | |
c906108c SS |
815 | |
816 | som_solib_total_st_size += st_size; | |
817 | ||
818 | /* This fills in new_so->objfile, among others. */ | |
819 | som_solib_load_symbols (new_so, name, from_tty, text_addr, target); | |
820 | } | |
821 | ||
822 | #ifdef SOLIB_DEBUG | |
c5aa993b | 823 | printf ("--Done reading shared library data\n"); |
c906108c SS |
824 | #endif |
825 | ||
826 | /* Getting new symbols may change our opinion about what is | |
827 | frameless. */ | |
828 | reinit_frame_cache (); | |
829 | return; | |
830 | ||
831 | old_dld: | |
a3f17187 | 832 | error (_("Debugging dynamic executables loaded via the hpux8 dld.sl is not supported.")); |
c906108c SS |
833 | |
834 | err: | |
8a3fe4f8 | 835 | error (_("Error while reading dynamic library list.")); |
c906108c SS |
836 | } |
837 | ||
838 | ||
839 | /* This hook gets called just before the first instruction in the | |
840 | inferior process is executed. | |
841 | ||
842 | This is our opportunity to set magic flags in the inferior so | |
843 | that GDB can be notified when a shared library is mapped in and | |
844 | to tell the dynamic linker that a private copy of the library is | |
845 | needed (so GDB can set breakpoints in the library). | |
846 | ||
847 | __dld_flags is the location of the magic flags; as of this implementation | |
848 | there are 3 flags of interest: | |
849 | ||
850 | bit 0 when set indicates that private copies of the libraries are needed | |
851 | bit 1 when set indicates that the callback hook routine is valid | |
852 | bit 2 when set indicates that the dynamic linker should maintain the | |
c5aa993b | 853 | __dld_list structure when loading/unloading libraries. |
c906108c SS |
854 | |
855 | Note that shared libraries are not mapped in at this time, so we have | |
856 | run the inferior until the libraries are mapped in. Typically this | |
857 | means running until the "_start" is called. */ | |
858 | ||
859 | void | |
fba45db2 | 860 | som_solib_create_inferior_hook (void) |
c906108c SS |
861 | { |
862 | struct minimal_symbol *msymbol; | |
863 | unsigned int dld_flags, status, have_endo; | |
864 | asection *shlib_info; | |
865 | char buf[4]; | |
866 | struct objfile *objfile; | |
867 | CORE_ADDR anaddr; | |
868 | ||
869 | /* First, remove all the solib event breakpoints. Their addresses | |
870 | may have changed since the last time we ran the program. */ | |
871 | remove_solib_event_breakpoints (); | |
872 | ||
873 | if (symfile_objfile == NULL) | |
c5aa993b | 874 | return; |
c906108c SS |
875 | |
876 | /* First see if the objfile was dynamically linked. */ | |
877 | shlib_info = bfd_get_section_by_name (symfile_objfile->obfd, "$SHLIB_INFO$"); | |
878 | if (!shlib_info) | |
879 | return; | |
880 | ||
881 | /* It's got a $SHLIB_INFO$ section, make sure it's not empty. */ | |
882 | if (bfd_section_size (symfile_objfile->obfd, shlib_info) == 0) | |
883 | return; | |
884 | ||
885 | have_endo = 0; | |
9b3128c4 JL |
886 | /* Slam the pid of the process into __d_pid. |
887 | ||
888 | We used to warn when this failed, but that warning is only useful | |
889 | on very old HP systems (hpux9 and older). The warnings are an | |
890 | annoyance to users of modern systems and foul up the testsuite as | |
891 | well. As a result, the warnings have been disabled. */ | |
c906108c SS |
892 | msymbol = lookup_minimal_symbol ("__d_pid", NULL, symfile_objfile); |
893 | if (msymbol == NULL) | |
9b3128c4 | 894 | goto keep_going; |
c906108c SS |
895 | |
896 | anaddr = SYMBOL_VALUE_ADDRESS (msymbol); | |
39f77062 | 897 | store_unsigned_integer (buf, 4, PIDGET (inferior_ptid)); |
c906108c SS |
898 | status = target_write_memory (anaddr, buf, 4); |
899 | if (status != 0) | |
900 | { | |
8a3fe4f8 AC |
901 | warning (_("Unable to write __d_pid")); |
902 | warning (_("Suggest linking with /opt/langtools/lib/end.o.")); | |
903 | warning (_("GDB will be unable to track shl_load/shl_unload calls")); | |
c906108c SS |
904 | goto keep_going; |
905 | } | |
906 | ||
907 | /* Get the value of _DLD_HOOK (an export stub) and put it in __dld_hook; | |
908 | This will force the dynamic linker to call __d_trap when significant | |
909 | events occur. | |
910 | ||
911 | Note that the above is the pre-HP-UX 9.0 behaviour. At 9.0 and above, | |
912 | the dld provides an export stub named "__d_trap" as well as the | |
913 | function named "__d_trap" itself, but doesn't provide "_DLD_HOOK". | |
914 | We'll look first for the old flavor and then the new. | |
c5aa993b | 915 | */ |
c906108c SS |
916 | msymbol = lookup_minimal_symbol ("_DLD_HOOK", NULL, symfile_objfile); |
917 | if (msymbol == NULL) | |
c5aa993b | 918 | msymbol = lookup_minimal_symbol ("__d_trap", NULL, symfile_objfile); |
c906108c SS |
919 | if (msymbol == NULL) |
920 | { | |
8a3fe4f8 AC |
921 | warning (_("Unable to find _DLD_HOOK symbol in object file.")); |
922 | warning (_("Suggest linking with /opt/langtools/lib/end.o.")); | |
923 | warning (_("GDB will be unable to track shl_load/shl_unload calls")); | |
c906108c SS |
924 | goto keep_going; |
925 | } | |
926 | anaddr = SYMBOL_VALUE_ADDRESS (msymbol); | |
927 | dld_cache.hook.address = anaddr; | |
928 | ||
929 | /* Grrr, this might not be an export symbol! We have to find the | |
930 | export stub. */ | |
931 | ALL_OBJFILES (objfile) | |
c5aa993b JM |
932 | { |
933 | struct unwind_table_entry *u; | |
934 | struct minimal_symbol *msymbol2; | |
935 | ||
936 | /* What a crock. */ | |
22abf04a | 937 | msymbol2 = lookup_minimal_symbol_solib_trampoline (DEPRECATED_SYMBOL_NAME (msymbol), |
40324f1b | 938 | objfile); |
c5aa993b JM |
939 | /* Found a symbol with the right name. */ |
940 | if (msymbol2) | |
941 | { | |
942 | struct unwind_table_entry *u; | |
943 | /* It must be a shared library trampoline. */ | |
944 | if (SYMBOL_TYPE (msymbol2) != mst_solib_trampoline) | |
945 | continue; | |
946 | ||
947 | /* It must also be an export stub. */ | |
948 | u = find_unwind_entry (SYMBOL_VALUE (msymbol2)); | |
949 | if (!u || u->stub_unwind.stub_type != EXPORT) | |
950 | continue; | |
951 | ||
952 | /* OK. Looks like the correct import stub. */ | |
953 | anaddr = SYMBOL_VALUE (msymbol2); | |
954 | dld_cache.hook_stub.address = anaddr; | |
955 | } | |
956 | } | |
c906108c SS |
957 | store_unsigned_integer (buf, 4, anaddr); |
958 | ||
959 | msymbol = lookup_minimal_symbol ("__dld_hook", NULL, symfile_objfile); | |
960 | if (msymbol == NULL) | |
961 | { | |
8a3fe4f8 AC |
962 | warning (_("Unable to find __dld_hook symbol in object file.")); |
963 | warning (_("Suggest linking with /opt/langtools/lib/end.o.")); | |
964 | warning (_("GDB will be unable to track shl_load/shl_unload calls")); | |
c906108c SS |
965 | goto keep_going; |
966 | } | |
967 | anaddr = SYMBOL_VALUE_ADDRESS (msymbol); | |
968 | status = target_write_memory (anaddr, buf, 4); | |
c5aa993b | 969 | |
c906108c SS |
970 | /* Now set a shlib_event breakpoint at __d_trap so we can track |
971 | significant shared library events. */ | |
972 | msymbol = lookup_minimal_symbol ("__d_trap", NULL, symfile_objfile); | |
973 | if (msymbol == NULL) | |
974 | { | |
8a3fe4f8 AC |
975 | warning (_("Unable to find __dld_d_trap symbol in object file.")); |
976 | warning (_("Suggest linking with /opt/langtools/lib/end.o.")); | |
977 | warning (_("GDB will be unable to track shl_load/shl_unload calls")); | |
c906108c SS |
978 | goto keep_going; |
979 | } | |
980 | create_solib_event_breakpoint (SYMBOL_VALUE_ADDRESS (msymbol)); | |
981 | ||
982 | /* We have all the support usually found in end.o, so we can track | |
983 | shl_load and shl_unload calls. */ | |
984 | have_endo = 1; | |
985 | ||
986 | keep_going: | |
987 | ||
988 | /* Get the address of __dld_flags, if no such symbol exists, then we can | |
989 | not debug the shared code. */ | |
990 | msymbol = lookup_minimal_symbol ("__dld_flags", NULL, NULL); | |
991 | if (msymbol == NULL) | |
8a3fe4f8 | 992 | error (_("Unable to find __dld_flags symbol in object file.")); |
c906108c SS |
993 | |
994 | anaddr = SYMBOL_VALUE_ADDRESS (msymbol); | |
995 | ||
996 | /* Read the current contents. */ | |
997 | status = target_read_memory (anaddr, buf, 4); | |
998 | if (status != 0) | |
8a3fe4f8 | 999 | error (_("Unable to read __dld_flags.")); |
c906108c SS |
1000 | dld_flags = extract_unsigned_integer (buf, 4); |
1001 | ||
1002 | /* Turn on the flags we care about. */ | |
1003 | dld_flags |= DLD_FLAGS_MAPPRIVATE; | |
1004 | if (have_endo) | |
1005 | dld_flags |= DLD_FLAGS_HOOKVALID; | |
1006 | store_unsigned_integer (buf, 4, dld_flags); | |
1007 | status = target_write_memory (anaddr, buf, 4); | |
1008 | if (status != 0) | |
8a3fe4f8 | 1009 | error (_("Unable to write __dld_flags.")); |
c906108c SS |
1010 | |
1011 | /* Now find the address of _start and set a breakpoint there. | |
1012 | We still need this code for two reasons: | |
1013 | ||
c5aa993b JM |
1014 | * Not all sites have /opt/langtools/lib/end.o, so it's not always |
1015 | possible to track the dynamic linker's events. | |
1016 | ||
1017 | * At this time no events are triggered for shared libraries | |
1018 | loaded at startup time (what a crock). */ | |
c906108c | 1019 | |
c906108c SS |
1020 | msymbol = lookup_minimal_symbol ("_start", NULL, symfile_objfile); |
1021 | if (msymbol == NULL) | |
8a3fe4f8 | 1022 | error (_("Unable to find _start symbol in object file.")); |
c906108c SS |
1023 | |
1024 | anaddr = SYMBOL_VALUE_ADDRESS (msymbol); | |
1025 | ||
1026 | /* Make the breakpoint at "_start" a shared library event breakpoint. */ | |
1027 | create_solib_event_breakpoint (anaddr); | |
1028 | ||
1029 | /* Wipe out all knowledge of old shared libraries since their | |
1030 | mapping can change from one exec to another! */ | |
1031 | while (so_list_head) | |
1032 | { | |
1033 | struct so_list *temp; | |
1034 | ||
1035 | temp = so_list_head; | |
b8c9b27d | 1036 | xfree (so_list_head); |
c906108c SS |
1037 | so_list_head = temp->next; |
1038 | } | |
1039 | clear_symtab_users (); | |
1040 | } | |
1041 | ||
c906108c SS |
1042 | /* This operation removes the "hook" between GDB and the dynamic linker, |
1043 | which causes the dld to notify GDB of shared library events. | |
1044 | ||
1045 | After this operation completes, the dld will no longer notify GDB of | |
1046 | shared library events. To resume notifications, GDB must call | |
1047 | som_solib_create_inferior_hook. | |
1048 | ||
318965d7 MS |
1049 | This operation does not remove any knowledge of shared libraries |
1050 | of which GDB may already have been notified. | |
c5aa993b | 1051 | */ |
c906108c | 1052 | void |
fba45db2 | 1053 | som_solib_remove_inferior_hook (int pid) |
c906108c | 1054 | { |
c5aa993b JM |
1055 | CORE_ADDR addr; |
1056 | struct minimal_symbol *msymbol; | |
1057 | int status; | |
0d99fdb9 | 1058 | char dld_flags_buffer[4]; |
c5aa993b | 1059 | unsigned int dld_flags_value; |
ce696e05 | 1060 | struct cleanup *old_cleanups = save_inferior_ptid (); |
c906108c SS |
1061 | |
1062 | /* Ensure that we're really operating on the specified process. */ | |
39f77062 | 1063 | inferior_ptid = pid_to_ptid (pid); |
c906108c SS |
1064 | |
1065 | /* We won't bother to remove the solib breakpoints from this process. | |
1066 | ||
1067 | In fact, on PA64 the breakpoint is hard-coded into the dld callback, | |
1068 | and thus we're not supposed to remove it. | |
1069 | ||
1070 | Rather, we'll merely clear the dld_flags bit that enables callbacks. | |
c5aa993b | 1071 | */ |
c906108c SS |
1072 | msymbol = lookup_minimal_symbol ("__dld_flags", NULL, NULL); |
1073 | ||
1074 | addr = SYMBOL_VALUE_ADDRESS (msymbol); | |
9ca80cf8 | 1075 | status = target_read_memory (addr, dld_flags_buffer, 4); |
c906108c | 1076 | |
9ca80cf8 | 1077 | dld_flags_value = extract_unsigned_integer (dld_flags_buffer, 4); |
c906108c SS |
1078 | |
1079 | dld_flags_value &= ~DLD_FLAGS_HOOKVALID; | |
9ca80cf8 RC |
1080 | store_unsigned_integer (dld_flags_buffer, 4, dld_flags_value); |
1081 | status = target_write_memory (addr, dld_flags_buffer, 4); | |
c906108c SS |
1082 | |
1083 | do_cleanups (old_cleanups); | |
1084 | } | |
1085 | ||
1086 | ||
1087 | /* This function creates a breakpoint on the dynamic linker hook, which | |
1088 | is called when e.g., a shl_load or shl_unload call is made. This | |
1089 | breakpoint will only trigger when a shl_load call is made. | |
1090 | ||
1091 | If filename is NULL, then loads of any dll will be caught. Else, | |
1092 | only loads of the file whose pathname is the string contained by | |
1093 | filename will be caught. | |
1094 | ||
1095 | Undefined behaviour is guaranteed if this function is called before | |
1096 | som_solib_create_inferior_hook. | |
c5aa993b | 1097 | */ |
c906108c | 1098 | void |
fba45db2 KB |
1099 | som_solib_create_catch_load_hook (int pid, int tempflag, char *filename, |
1100 | char *cond_string) | |
c906108c | 1101 | { |
318965d7 MS |
1102 | create_solib_load_event_breakpoint ("__d_trap", tempflag, |
1103 | filename, cond_string); | |
c906108c SS |
1104 | } |
1105 | ||
1106 | /* This function creates a breakpoint on the dynamic linker hook, which | |
1107 | is called when e.g., a shl_load or shl_unload call is made. This | |
1108 | breakpoint will only trigger when a shl_unload call is made. | |
1109 | ||
1110 | If filename is NULL, then unloads of any dll will be caught. Else, | |
1111 | only unloads of the file whose pathname is the string contained by | |
1112 | filename will be caught. | |
1113 | ||
1114 | Undefined behaviour is guaranteed if this function is called before | |
1115 | som_solib_create_inferior_hook. | |
c5aa993b | 1116 | */ |
c906108c | 1117 | void |
fba45db2 KB |
1118 | som_solib_create_catch_unload_hook (int pid, int tempflag, char *filename, |
1119 | char *cond_string) | |
c906108c | 1120 | { |
318965d7 MS |
1121 | create_solib_unload_event_breakpoint ("__d_trap", tempflag, |
1122 | filename, cond_string); | |
c906108c SS |
1123 | } |
1124 | ||
1125 | int | |
fba45db2 | 1126 | som_solib_have_load_event (int pid) |
c906108c | 1127 | { |
c5aa993b | 1128 | CORE_ADDR event_kind; |
c906108c | 1129 | |
34f75cc1 | 1130 | event_kind = read_register (HPPA_ARG0_REGNUM); |
c906108c SS |
1131 | return (event_kind == SHL_LOAD); |
1132 | } | |
1133 | ||
1134 | int | |
fba45db2 | 1135 | som_solib_have_unload_event (int pid) |
c906108c | 1136 | { |
c5aa993b | 1137 | CORE_ADDR event_kind; |
c906108c | 1138 | |
34f75cc1 | 1139 | event_kind = read_register (HPPA_ARG0_REGNUM); |
c906108c SS |
1140 | return (event_kind == SHL_UNLOAD); |
1141 | } | |
1142 | ||
1143 | static char * | |
fba45db2 | 1144 | som_solib_library_pathname (int pid) |
c906108c | 1145 | { |
c5aa993b JM |
1146 | CORE_ADDR dll_handle_address; |
1147 | CORE_ADDR dll_pathname_address; | |
1148 | struct som_solib_mapped_entry dll_descriptor; | |
1149 | char *p; | |
1150 | static char dll_pathname[1024]; | |
c906108c SS |
1151 | |
1152 | /* Read the descriptor of this newly-loaded library. */ | |
34f75cc1 | 1153 | dll_handle_address = read_register (HPPA_ARG1_REGNUM); |
c906108c SS |
1154 | read_memory (dll_handle_address, (char *) &dll_descriptor, sizeof (dll_descriptor)); |
1155 | ||
1156 | /* We can find a pointer to the dll's pathname within the descriptor. */ | |
1157 | dll_pathname_address = (CORE_ADDR) dll_descriptor.name; | |
c5aa993b | 1158 | |
c906108c SS |
1159 | /* Read the pathname, one byte at a time. */ |
1160 | p = dll_pathname; | |
1161 | for (;;) | |
1162 | { | |
c5aa993b | 1163 | char b; |
c906108c SS |
1164 | read_memory (dll_pathname_address++, (char *) &b, 1); |
1165 | *p++ = b; | |
1166 | if (b == '\0') | |
c5aa993b | 1167 | break; |
c906108c SS |
1168 | } |
1169 | ||
1170 | return dll_pathname; | |
1171 | } | |
1172 | ||
1173 | char * | |
fba45db2 | 1174 | som_solib_loaded_library_pathname (int pid) |
c906108c | 1175 | { |
c5aa993b | 1176 | if (!som_solib_have_load_event (pid)) |
8a3fe4f8 | 1177 | error (_("Must have a load event to use this query")); |
c906108c SS |
1178 | |
1179 | return som_solib_library_pathname (pid); | |
1180 | } | |
1181 | ||
1182 | char * | |
fba45db2 | 1183 | som_solib_unloaded_library_pathname (int pid) |
c906108c | 1184 | { |
c5aa993b | 1185 | if (!som_solib_have_unload_event (pid)) |
8a3fe4f8 | 1186 | error (_("Must have an unload event to use this query")); |
c906108c SS |
1187 | |
1188 | return som_solib_library_pathname (pid); | |
1189 | } | |
1190 | ||
1191 | static void | |
fba45db2 | 1192 | som_solib_desire_dynamic_linker_symbols (void) |
c906108c SS |
1193 | { |
1194 | struct objfile *objfile; | |
1195 | struct unwind_table_entry *u; | |
c5aa993b | 1196 | struct minimal_symbol *dld_msymbol; |
c906108c SS |
1197 | |
1198 | /* Do we already know the value of these symbols? If so, then | |
1199 | we've no work to do. | |
1200 | ||
1201 | (If you add clauses to this test, be sure to likewise update the | |
1202 | test within the loop.) | |
c5aa993b | 1203 | */ |
c906108c SS |
1204 | if (dld_cache.is_valid) |
1205 | return; | |
1206 | ||
1207 | ALL_OBJFILES (objfile) | |
c5aa993b JM |
1208 | { |
1209 | dld_msymbol = lookup_minimal_symbol ("shl_load", NULL, objfile); | |
1210 | if (dld_msymbol != NULL) | |
1211 | { | |
1212 | dld_cache.load.address = SYMBOL_VALUE (dld_msymbol); | |
1213 | dld_cache.load.unwind = find_unwind_entry (dld_cache.load.address); | |
1214 | } | |
1215 | ||
1216 | dld_msymbol = lookup_minimal_symbol_solib_trampoline ("shl_load", | |
c5aa993b JM |
1217 | objfile); |
1218 | if (dld_msymbol != NULL) | |
1219 | { | |
1220 | if (SYMBOL_TYPE (dld_msymbol) == mst_solib_trampoline) | |
1221 | { | |
1222 | u = find_unwind_entry (SYMBOL_VALUE (dld_msymbol)); | |
1223 | if ((u != NULL) && (u->stub_unwind.stub_type == EXPORT)) | |
1224 | { | |
1225 | dld_cache.load_stub.address = SYMBOL_VALUE (dld_msymbol); | |
1226 | dld_cache.load_stub.unwind = u; | |
1227 | } | |
1228 | } | |
1229 | } | |
1230 | ||
1231 | dld_msymbol = lookup_minimal_symbol ("shl_unload", NULL, objfile); | |
1232 | if (dld_msymbol != NULL) | |
1233 | { | |
1234 | dld_cache.unload.address = SYMBOL_VALUE (dld_msymbol); | |
1235 | dld_cache.unload.unwind = find_unwind_entry (dld_cache.unload.address); | |
1236 | ||
1237 | /* ??rehrauer: I'm not sure exactly what this is, but it appears | |
1238 | that on some HPUX 10.x versions, there's two unwind regions to | |
1239 | cover the body of "shl_unload", the second being 4 bytes past | |
1240 | the end of the first. This is a large hack to handle that | |
1241 | case, but since I don't seem to have any legitimate way to | |
1242 | look for this thing via the symbol table... | |
1243 | */ | |
1244 | if (dld_cache.unload.unwind != NULL) | |
1245 | { | |
1246 | u = find_unwind_entry (dld_cache.unload.unwind->region_end + 4); | |
1247 | if (u != NULL) | |
1248 | { | |
1249 | dld_cache.unload2.address = u->region_start; | |
1250 | dld_cache.unload2.unwind = u; | |
1251 | } | |
1252 | } | |
1253 | } | |
1254 | ||
1255 | dld_msymbol = lookup_minimal_symbol_solib_trampoline ("shl_unload", | |
c5aa993b JM |
1256 | objfile); |
1257 | if (dld_msymbol != NULL) | |
1258 | { | |
1259 | if (SYMBOL_TYPE (dld_msymbol) == mst_solib_trampoline) | |
1260 | { | |
1261 | u = find_unwind_entry (SYMBOL_VALUE (dld_msymbol)); | |
1262 | if ((u != NULL) && (u->stub_unwind.stub_type == EXPORT)) | |
1263 | { | |
1264 | dld_cache.unload_stub.address = SYMBOL_VALUE (dld_msymbol); | |
1265 | dld_cache.unload_stub.unwind = u; | |
1266 | } | |
1267 | } | |
1268 | } | |
1269 | ||
1270 | /* Did we find everything we were looking for? If so, stop. */ | |
8f236061 AC |
1271 | if ((dld_cache.load.address != 0) |
1272 | && (dld_cache.load_stub.address != 0) | |
1273 | && (dld_cache.unload.address != 0) | |
1274 | && (dld_cache.unload_stub.address != 0)) | |
c5aa993b JM |
1275 | { |
1276 | dld_cache.is_valid = 1; | |
1277 | break; | |
1278 | } | |
1279 | } | |
c906108c SS |
1280 | |
1281 | dld_cache.hook.unwind = find_unwind_entry (dld_cache.hook.address); | |
1282 | dld_cache.hook_stub.unwind = find_unwind_entry (dld_cache.hook_stub.address); | |
1283 | ||
1284 | /* We're prepared not to find some of these symbols, which is why | |
1285 | this function is a "desire" operation, and not a "require". | |
c5aa993b | 1286 | */ |
c906108c SS |
1287 | } |
1288 | ||
1289 | int | |
fba45db2 | 1290 | som_solib_in_dynamic_linker (int pid, CORE_ADDR pc) |
c906108c | 1291 | { |
c5aa993b | 1292 | struct unwind_table_entry *u_pc; |
c906108c SS |
1293 | |
1294 | /* Are we in the dld itself? | |
1295 | ||
1296 | ??rehrauer: Large hack -- We'll assume that any address in a | |
1297 | shared text region is the dld's text. This would obviously | |
1298 | fall down if the user attached to a process, whose shlibs | |
1299 | weren't mapped to a (writeable) private region. However, in | |
1300 | that case the debugger probably isn't able to set the fundamental | |
1301 | breakpoint in the dld callback anyways, so this hack should be | |
1302 | safe. | |
c5aa993b | 1303 | */ |
c906108c SS |
1304 | if ((pc & (CORE_ADDR) 0xc0000000) == (CORE_ADDR) 0xc0000000) |
1305 | return 1; | |
1306 | ||
1307 | /* Cache the address of some symbols that are part of the dynamic | |
1308 | linker, if not already known. | |
c5aa993b | 1309 | */ |
c906108c SS |
1310 | som_solib_desire_dynamic_linker_symbols (); |
1311 | ||
1312 | /* Are we in the dld callback? Or its export stub? */ | |
1313 | u_pc = find_unwind_entry (pc); | |
1314 | if (u_pc == NULL) | |
1315 | return 0; | |
1316 | ||
1317 | if ((u_pc == dld_cache.hook.unwind) || (u_pc == dld_cache.hook_stub.unwind)) | |
1318 | return 1; | |
1319 | ||
1320 | /* Or the interface of the dld (i.e., "shl_load" or friends)? */ | |
1321 | if ((u_pc == dld_cache.load.unwind) | |
1322 | || (u_pc == dld_cache.unload.unwind) | |
1323 | || (u_pc == dld_cache.unload2.unwind) | |
1324 | || (u_pc == dld_cache.load_stub.unwind) | |
1325 | || (u_pc == dld_cache.unload_stub.unwind)) | |
1326 | return 1; | |
1327 | ||
1328 | /* Apparently this address isn't part of the dld's text. */ | |
1329 | return 0; | |
1330 | } | |
1331 | ||
1332 | ||
1333 | /* Return the GOT value for the shared library in which ADDR belongs. If | |
1334 | ADDR isn't in any known shared library, return zero. */ | |
1335 | ||
1336 | CORE_ADDR | |
fba45db2 | 1337 | som_solib_get_got_by_pc (CORE_ADDR addr) |
c906108c SS |
1338 | { |
1339 | struct so_list *so_list = so_list_head; | |
1340 | CORE_ADDR got_value = 0; | |
1341 | ||
1342 | while (so_list) | |
1343 | { | |
1344 | if (so_list->som_solib.text_addr <= addr | |
1345 | && so_list->som_solib.text_end > addr) | |
1346 | { | |
1347 | got_value = so_list->som_solib.got_value; | |
1348 | break; | |
1349 | } | |
1350 | so_list = so_list->next; | |
1351 | } | |
1352 | return got_value; | |
1353 | } | |
1354 | ||
1355 | /* elz: | |
1356 | Return the address of the handle of the shared library | |
1357 | in which ADDR belongs. If | |
1358 | ADDR isn't in any known shared library, return zero. */ | |
c5aa993b | 1359 | /* this function is used in hppa_fix_call_dummy in hppa-tdep.c */ |
c906108c SS |
1360 | |
1361 | CORE_ADDR | |
fba45db2 | 1362 | som_solib_get_solib_by_pc (CORE_ADDR addr) |
c906108c SS |
1363 | { |
1364 | struct so_list *so_list = so_list_head; | |
1365 | ||
1366 | while (so_list) | |
1367 | { | |
1368 | if (so_list->som_solib.text_addr <= addr | |
1369 | && so_list->som_solib.text_end > addr) | |
c5aa993b | 1370 | { |
c906108c | 1371 | break; |
c5aa993b | 1372 | } |
c906108c SS |
1373 | so_list = so_list->next; |
1374 | } | |
1375 | if (so_list) | |
c5aa993b | 1376 | return so_list->solib_addr; |
c906108c | 1377 | else |
c5aa993b | 1378 | return 0; |
c906108c SS |
1379 | } |
1380 | ||
1381 | ||
1382 | int | |
fba45db2 KB |
1383 | som_solib_section_offsets (struct objfile *objfile, |
1384 | struct section_offsets *offsets) | |
c906108c SS |
1385 | { |
1386 | struct so_list *so_list = so_list_head; | |
1387 | ||
1388 | while (so_list) | |
1389 | { | |
1390 | /* Oh what a pain! We need the offsets before so_list->objfile | |
c5aa993b | 1391 | is valid. The BFDs will never match. Make a best guess. */ |
c906108c SS |
1392 | if (strstr (objfile->name, so_list->som_solib.name)) |
1393 | { | |
1394 | asection *private_section; | |
1395 | ||
1396 | /* The text offset is easy. */ | |
f0a58b0b | 1397 | offsets->offsets[SECT_OFF_TEXT (objfile)] |
c906108c SS |
1398 | = (so_list->som_solib.text_addr |
1399 | - so_list->som_solib.text_link_addr); | |
f0a58b0b | 1400 | offsets->offsets[SECT_OFF_RODATA (objfile)] |
b8fbeb18 | 1401 | = ANOFFSET (offsets, SECT_OFF_TEXT (objfile)); |
c906108c SS |
1402 | |
1403 | /* We should look at presumed_dp in the SOM header, but | |
1404 | that's not easily available. This should be OK though. */ | |
1405 | private_section = bfd_get_section_by_name (objfile->obfd, | |
1406 | "$PRIVATE$"); | |
1407 | if (!private_section) | |
1408 | { | |
8a3fe4f8 | 1409 | warning (_("Unable to find $PRIVATE$ in shared library!")); |
f0a58b0b EZ |
1410 | offsets->offsets[SECT_OFF_DATA (objfile)] = 0; |
1411 | offsets->offsets[SECT_OFF_BSS (objfile)] = 0; | |
c906108c SS |
1412 | return 1; |
1413 | } | |
f0a58b0b | 1414 | offsets->offsets[SECT_OFF_DATA (objfile)] |
c906108c | 1415 | = (so_list->som_solib.data_start - private_section->vma); |
f0a58b0b | 1416 | offsets->offsets[SECT_OFF_BSS (objfile)] |
b8fbeb18 | 1417 | = ANOFFSET (offsets, SECT_OFF_DATA (objfile)); |
c906108c SS |
1418 | return 1; |
1419 | } | |
1420 | so_list = so_list->next; | |
1421 | } | |
1422 | return 0; | |
1423 | } | |
1424 | ||
1425 | /* Dump information about all the currently loaded shared libraries. */ | |
1426 | ||
1427 | static void | |
fba45db2 | 1428 | som_sharedlibrary_info_command (char *ignore, int from_tty) |
c906108c SS |
1429 | { |
1430 | struct so_list *so_list = so_list_head; | |
1431 | ||
1432 | if (exec_bfd == NULL) | |
1433 | { | |
4ce44c66 | 1434 | printf_unfiltered ("No executable file.\n"); |
c906108c SS |
1435 | return; |
1436 | } | |
1437 | ||
1438 | if (so_list == NULL) | |
1439 | { | |
1440 | printf_unfiltered ("No shared libraries loaded at this time.\n"); | |
1441 | return; | |
1442 | } | |
1443 | ||
1444 | printf_unfiltered ("Shared Object Libraries\n"); | |
1445 | printf_unfiltered (" %-12s%-12s%-12s%-12s%-12s%-12s\n", | |
c5aa993b | 1446 | " flags", " tstart", " tend", " dstart", " dend", " dlt"); |
c906108c SS |
1447 | while (so_list) |
1448 | { | |
1449 | unsigned int flags; | |
1450 | ||
1451 | flags = so_list->som_solib.struct_version << 24; | |
1452 | flags |= so_list->som_solib.bind_mode << 16; | |
1453 | flags |= so_list->som_solib.library_version; | |
1454 | printf_unfiltered ("%s", so_list->som_solib.name); | |
1455 | if (so_list->objfile == NULL) | |
c5aa993b | 1456 | printf_unfiltered (" (symbols not loaded)"); |
c906108c | 1457 | printf_unfiltered ("\n"); |
bb599908 | 1458 | printf_unfiltered (" %-12s", hex_string_custom (flags, 8)); |
c906108c | 1459 | printf_unfiltered ("%-12s", |
bb599908 | 1460 | hex_string_custom (so_list->som_solib.text_addr, 8)); |
c906108c | 1461 | printf_unfiltered ("%-12s", |
bb599908 | 1462 | hex_string_custom (so_list->som_solib.text_end, 8)); |
c906108c | 1463 | printf_unfiltered ("%-12s", |
bb599908 | 1464 | hex_string_custom (so_list->som_solib.data_start, 8)); |
c906108c | 1465 | printf_unfiltered ("%-12s", |
bb599908 | 1466 | hex_string_custom (so_list->som_solib.data_end, 8)); |
c906108c | 1467 | printf_unfiltered ("%-12s\n", |
bb599908 | 1468 | hex_string_custom (so_list->som_solib.got_value, 8)); |
c906108c SS |
1469 | so_list = so_list->next; |
1470 | } | |
1471 | } | |
1472 | ||
1473 | static void | |
fba45db2 | 1474 | som_solib_sharedlibrary_command (char *args, int from_tty) |
c906108c SS |
1475 | { |
1476 | dont_repeat (); | |
990f9fe3 | 1477 | som_solib_add (args, from_tty, (struct target_ops *) 0, 1); |
c906108c SS |
1478 | } |
1479 | ||
1480 | ||
1481 | ||
1482 | char * | |
fba45db2 | 1483 | som_solib_address (CORE_ADDR addr) |
c906108c | 1484 | { |
c5aa993b | 1485 | struct so_list *so = so_list_head; |
c906108c SS |
1486 | |
1487 | while (so) | |
1488 | { | |
1489 | /* Is this address within this shlib's text range? If so, | |
1490 | return the shlib's name. | |
c5aa993b | 1491 | */ |
c906108c | 1492 | if ((addr >= so->som_solib.text_addr) && (addr <= so->som_solib.text_end)) |
c5aa993b | 1493 | return so->som_solib.name; |
c906108c SS |
1494 | |
1495 | /* Nope, keep looking... */ | |
1496 | so = so->next; | |
1497 | } | |
1498 | ||
1499 | /* No, we couldn't prove that the address is within a shlib. */ | |
1500 | return NULL; | |
1501 | } | |
1502 | ||
1503 | ||
1504 | void | |
fba45db2 | 1505 | som_solib_restart (void) |
c906108c | 1506 | { |
c5aa993b | 1507 | struct so_list *sl = so_list_head; |
c906108c SS |
1508 | |
1509 | /* Before the shlib info vanishes, use it to disable any breakpoints | |
1510 | that may still be active in those shlibs. | |
c5aa993b | 1511 | */ |
c906108c SS |
1512 | disable_breakpoints_in_shlibs (0); |
1513 | ||
1514 | /* Discard all the shlib descriptors. | |
c5aa993b | 1515 | */ |
c906108c SS |
1516 | while (sl) |
1517 | { | |
c5aa993b | 1518 | struct so_list *next_sl = sl->next; |
b8c9b27d | 1519 | xfree (sl); |
c906108c SS |
1520 | sl = next_sl; |
1521 | } | |
1522 | so_list_head = NULL; | |
1523 | ||
1524 | som_solib_total_st_size = (LONGEST) 0; | |
1525 | som_solib_st_size_threshold_exceeded = 0; | |
1526 | ||
1527 | dld_cache.is_valid = 0; | |
1528 | ||
1529 | dld_cache.hook.address = 0; | |
1530 | dld_cache.hook.unwind = NULL; | |
1531 | ||
1532 | dld_cache.hook_stub.address = 0; | |
1533 | dld_cache.hook_stub.unwind = NULL; | |
1534 | ||
1535 | dld_cache.load.address = 0; | |
1536 | dld_cache.load.unwind = NULL; | |
1537 | ||
1538 | dld_cache.load_stub.address = 0; | |
1539 | dld_cache.load_stub.unwind = NULL; | |
1540 | ||
1541 | dld_cache.unload.address = 0; | |
1542 | dld_cache.unload.unwind = NULL; | |
1543 | ||
1544 | dld_cache.unload2.address = 0; | |
1545 | dld_cache.unload2.unwind = NULL; | |
1546 | ||
1547 | dld_cache.unload_stub.address = 0; | |
1548 | dld_cache.unload_stub.unwind = NULL; | |
1549 | } | |
1550 | ||
1551 | ||
c906108c | 1552 | void |
fba45db2 | 1553 | _initialize_som_solib (void) |
c906108c SS |
1554 | { |
1555 | add_com ("sharedlibrary", class_files, som_solib_sharedlibrary_command, | |
1bedd215 | 1556 | _("Load shared object library symbols for files matching REGEXP.")); |
c906108c | 1557 | add_info ("sharedlibrary", som_sharedlibrary_info_command, |
1bedd215 | 1558 | _("Status of loaded shared object libraries.")); |
b7209cb4 | 1559 | |
5bf193a2 AC |
1560 | add_setshow_boolean_cmd ("auto-solib-add", class_support, |
1561 | &auto_solib_add, _("\ | |
1562 | Set autoloading of shared library symbols."), _("\ | |
1563 | Show autoloading of shared library symbols."), _("\ | |
b7209cb4 FF |
1564 | If \"on\", symbols from all shared object libraries will be loaded\n\ |
1565 | automatically when the inferior begins execution, when the dynamic linker\n\ | |
1566 | informs gdb that a new library has been loaded, or when attaching to the\n\ | |
5bf193a2 AC |
1567 | inferior. Otherwise, symbols must be loaded manually, using `sharedlibrary'."), |
1568 | NULL, | |
1569 | NULL, /* FIXME: i18n: */ | |
1570 | &setlist, &showlist); | |
c906108c | 1571 | |
85c07804 AC |
1572 | add_setshow_zinteger_cmd ("auto-solib-limit", class_support, |
1573 | &auto_solib_limit, _("\ | |
1574 | Set threshold (in Mb) for autoloading shared library symbols."), _("\ | |
1575 | Show threshold (in Mb) for autoloading shared library symbols."), _("\ | |
b7209cb4 FF |
1576 | When shared library autoloading is enabled, new libraries will be loaded\n\ |
1577 | only until the total size of shared library symbols exceeds this\n\ | |
85c07804 AC |
1578 | threshold in megabytes. Is ignored when using `sharedlibrary'."), |
1579 | NULL, | |
1580 | NULL, /* FIXME: i18n: */ | |
1581 | &setlist, &showlist); | |
b7209cb4 FF |
1582 | |
1583 | /* ??rehrauer: On HP-UX, the kernel parameter MAXDSIZ limits how | |
1584 | much data space a process can use. We ought to be reading | |
1585 | MAXDSIZ and setting auto_solib_limit to some large fraction of | |
1586 | that value. If not that, we maybe ought to be setting it smaller | |
1587 | than the default for MAXDSIZ (that being 64Mb, I believe). | |
1588 | However, [1] this threshold is only crudely approximated rather | |
1589 | than actually measured, and [2] 50 Mbytes is too small for | |
1590 | debugging gdb itself. Thus, the arbitrary 100 figure. */ | |
1591 | auto_solib_limit = 100; /* Megabytes */ | |
c906108c SS |
1592 | |
1593 | som_solib_restart (); | |
1594 | } | |
1595 | ||
1596 | /* Get some HPUX-specific data from a shared lib. | |
1597 | */ | |
1598 | CORE_ADDR | |
89676665 | 1599 | som_solib_thread_start_addr (struct so_list *so) |
c906108c | 1600 | { |
c5aa993b | 1601 | return so->som_solib.tsd_start_addr; |
c906108c | 1602 | } |
792432a5 MK |
1603 | |
1604 | #ifdef PA_SOM_ONLY | |
1605 | void | |
1606 | no_shared_libraries (char *ignored, int from_tty) | |
1607 | { | |
1608 | } | |
1609 | #endif |