gdb/solib-pa64.c

   1 /* Handle PA64 shared libraries for GDB, the GNU Debugger.
   2
   3    Copyright (C) 2004, 2007, 2008, 2009, 2010, 2011
   4    Free Software Foundation, Inc.
   5
   6    This file is part of GDB.
   7
   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 3 of the License, or
  11    (at your option) any later version.
  12
  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.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 /* HP in their infinite stupidity choose not to use standard ELF dynamic
  22    linker interfaces.  They also choose not to make their ELF dymamic
  23    linker interfaces compatible with the SOM dynamic linker.  The
  24    net result is we can not use either of the existing somsolib.c or
  25    solib.c.  What a crock.
  26
  27    Even more disgusting.  This file depends on functions provided only
  28    in certain PA64 libraries.  Thus this file is supposed to only be
  29    used native.  When will HP ever learn that they need to provide the
  30    same functionality in all their libraries!  */
  31
  32 #include "defs.h"
  33 #include "symtab.h"
  34 #include "bfd.h"
  35 #include "symfile.h"
  36 #include "objfiles.h"
  37 #include "gdbcore.h"
  38 #include "target.h"
  39 #include "inferior.h"
  40 #include "regcache.h"
  41
  42 #include "hppa-tdep.h"
  43 #include "solist.h"
  44 #include "solib.h"
  45 #include "solib-pa64.h"
  46
  47 #undef SOLIB_PA64_DBG
  48
  49 /* We can build this file only when running natively on 64-bit HP/UX.
  50    We check for that by checking for the elf_hp.h header file.  */
  51 #if defined(HAVE_ELF_HP_H) && defined(__LP64__)
  52
  53 /* FIXME: kettenis/20041213: These includes should be eliminated.  */
  54 #include <dlfcn.h>
  55 #include <elf.h>
  56 #include <elf_hp.h>
  57
  58 struct lm_info {
  59   struct load_module_desc desc;
  60   CORE_ADDR desc_addr;
  61 };
  62
  63 /* When adding fields, be sure to clear them in _initialize_pa64_solib.  */
  64 typedef struct
  65   {
  66     CORE_ADDR dld_flags_addr;
  67     LONGEST dld_flags;
  68     struct bfd_section *dyninfo_sect;
  69     int have_read_dld_descriptor;
  70     int is_valid;
  71     CORE_ADDR load_map;
  72     CORE_ADDR load_map_addr;
  73     struct load_module_desc dld_desc;
  74   }
  75 dld_cache_t;
  76
  77 static dld_cache_t dld_cache;
  78
  79 static int
  80 read_dynamic_info (asection *dyninfo_sect, dld_cache_t *dld_cache_p);
  81
  82 static void
  83 pa64_relocate_section_addresses (struct so_list *so,
  84                                  struct target_section *sec)
  85 {
  86   asection *asec = sec->the_bfd_section;
  87   CORE_ADDR load_offset;
  88
  89   /* Relocate all the sections based on where they got loaded.  */
  90
  91   load_offset = bfd_section_vma (so->abfd, asec) - asec->filepos;
  92
  93   if (asec->flags & SEC_CODE)
  94     {
  95       sec->addr += so->lm_info->desc.text_base - load_offset;
  96       sec->endaddr += so->lm_info->desc.text_base - load_offset;
  97     }
  98   else if (asec->flags & SEC_DATA)
  99     {
 100       sec->addr += so->lm_info->desc.data_base - load_offset;
 101       sec->endaddr += so->lm_info->desc.data_base - load_offset;
 102     }
 103 }
 104
 105 static void
 106 pa64_free_so (struct so_list *so)
 107 {
 108   xfree (so->lm_info);
 109 }
 110
 111 static void
 112 pa64_clear_solib (void)
 113 {
 114 }
 115
 116 /* Wrapper for target_read_memory for dlgetmodinfo.  */
 117
 118 static void *
 119 pa64_target_read_memory (void *buffer, CORE_ADDR ptr, size_t bufsiz, int ident)
 120 {
 121   if (target_read_memory (ptr, buffer, bufsiz) != 0)
 122     return 0;
 123   return buffer;
 124 }
 125
 126 /* Read the dynamic linker's internal shared library descriptor.
 127
 128    This must happen after dld starts running, so we can't do it in
 129    read_dynamic_info.  Record the fact that we have loaded the
 130    descriptor.  If the library is archive bound or the load map
 131    hasn't been setup, then return zero; else return nonzero.  */
 132
 133 static int
 134 read_dld_descriptor (void)
 135 {
 136   char *dll_path;
 137   asection *dyninfo_sect;
 138
 139   /* If necessary call read_dynamic_info to extract the contents of the
 140      .dynamic section from the shared library.  */
 141   if (!dld_cache.is_valid)
 142     {
 143       if (symfile_objfile == NULL)
 144         error (_("No object file symbols."));
 145
 146       dyninfo_sect = bfd_get_section_by_name (symfile_objfile->obfd,
 147                                               ".dynamic");
 148       if (!dyninfo_sect)
 149         {
 150           return 0;
 151         }
 152
 153       if (!read_dynamic_info (dyninfo_sect, &dld_cache))
 154         error (_("Unable to read in .dynamic section information."));
 155     }
 156
 157   /* Read the load map pointer.  */
 158   if (target_read_memory (dld_cache.load_map_addr,
 159                           (char *) &dld_cache.load_map,
 160                           sizeof (dld_cache.load_map))
 161       != 0)
 162     {
 163       error (_("Error while reading in load map pointer."));
 164     }
 165
 166   if (!dld_cache.load_map)
 167     return 0;
 168
 169   /* Read in the dld load module descriptor.  */
 170   if (dlgetmodinfo (-1,
 171                     &dld_cache.dld_desc,
 172                     sizeof (dld_cache.dld_desc),
 173                     pa64_target_read_memory,
 174                     0,
 175                     dld_cache.load_map)
 176       == 0)
 177     {
 178       error (_("Error trying to get information about dynamic linker."));
 179     }
 180
 181   /* Indicate that we have loaded the dld descriptor.  */
 182   dld_cache.have_read_dld_descriptor = 1;
 183
 184   return 1;
 185 }
 186
 187
 188 /* Read the .dynamic section and extract the information of interest,
 189    which is stored in dld_cache.  The routine elf_locate_base in solib.c
 190    was used as a model for this.  */
 191
 192 static int
 193 read_dynamic_info (asection *dyninfo_sect, dld_cache_t *dld_cache_p)
 194 {
 195   char *buf;
 196   char *bufend;
 197   CORE_ADDR dyninfo_addr;
 198   int dyninfo_sect_size;
 199   CORE_ADDR entry_addr;
 200
 201   /* Read in .dynamic section, silently ignore errors.  */
 202   dyninfo_addr = bfd_section_vma (symfile_objfile->obfd, dyninfo_sect);
 203   dyninfo_sect_size = bfd_section_size (exec_bfd, dyninfo_sect);
 204   buf = alloca (dyninfo_sect_size);
 205   if (target_read_memory (dyninfo_addr, buf, dyninfo_sect_size))
 206     return 0;
 207
 208   /* Scan the .dynamic section and record the items of interest.
 209      In particular, DT_HP_DLD_FLAGS.  */
 210   for (bufend = buf + dyninfo_sect_size, entry_addr = dyninfo_addr;
 211        buf < bufend;
 212        buf += sizeof (Elf64_Dyn), entry_addr += sizeof (Elf64_Dyn))
 213     {
 214       Elf64_Dyn *x_dynp = (Elf64_Dyn*)buf;
 215       Elf64_Sxword dyn_tag;
 216       CORE_ADDR dyn_ptr;
 217
 218       dyn_tag = bfd_h_get_64 (symfile_objfile->obfd,
 219                               (bfd_byte*) &x_dynp->d_tag);
 220
 221       /* We can't use a switch here because dyn_tag is 64 bits and HP's
 222          lame comiler does not handle 64bit items in switch statements.  */
 223       if (dyn_tag == DT_NULL)
 224         break;
 225       else if (dyn_tag == DT_HP_DLD_FLAGS)
 226         {
 227           /* Set dld_flags_addr and dld_flags in *dld_cache_p.  */
 228           dld_cache_p->dld_flags_addr = entry_addr + offsetof(Elf64_Dyn, d_un);
 229           if (target_read_memory (dld_cache_p->dld_flags_addr,
 230                                   (char*) &dld_cache_p->dld_flags,
 231                                   sizeof (dld_cache_p->dld_flags))
 232               != 0)
 233             {
 234               error (_("Error while reading in "
 235                        ".dynamic section of the program."));
 236             }
 237         }
 238       else if (dyn_tag == DT_HP_LOAD_MAP)
 239         {
 240           /* Dld will place the address of the load map at load_map_addr
 241              after it starts running.  */
 242           if (target_read_memory (entry_addr + offsetof(Elf64_Dyn,
 243                                                         d_un.d_ptr),
 244                                   (char*) &dld_cache_p->load_map_addr,
 245                                   sizeof (dld_cache_p->load_map_addr))
 246               != 0)
 247             {
 248               error (_("Error while reading in "
 249                        ".dynamic section of the program."));
 250             }
 251         }
 252       else
 253         {
 254           /* Tag is not of interest.  */
 255         }
 256     }
 257
 258   /* Record other information and set is_valid to 1.  */
 259   dld_cache_p->dyninfo_sect = dyninfo_sect;
 260
 261   /* Verify that we read in required info.  These fields are re-set to zero
 262      in pa64_solib_restart.  */
 263
 264   if (dld_cache_p->dld_flags_addr != 0 && dld_cache_p->load_map_addr != 0)
 265     dld_cache_p->is_valid = 1;
 266   else
 267     return 0;
 268
 269   return 1;
 270 }
 271
 272 /* bfd_lookup_symbol -- lookup the value for a specific symbol
 273
 274    An expensive way to lookup the value of a single symbol for
 275    bfd's that are only temporary anyway.  This is used by the
 276    shared library support to find the address of the debugger
 277    interface structures in the shared library.
 278
 279    Note that 0 is specifically allowed as an error return (no
 280    such symbol).  */
 281
 282 static CORE_ADDR
 283 bfd_lookup_symbol (bfd *abfd, char *symname)
 284 {
 285   unsigned int storage_needed;
 286   asymbol *sym;
 287   asymbol **symbol_table;
 288   unsigned int number_of_symbols;
 289   unsigned int i;
 290   struct cleanup *back_to;
 291   CORE_ADDR symaddr = 0;
 292
 293   storage_needed = bfd_get_symtab_upper_bound (abfd);
 294
 295   if (storage_needed > 0)
 296     {
 297       symbol_table = (asymbol **) xmalloc (storage_needed);
 298       back_to = make_cleanup (xfree, symbol_table);
 299       number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table);
 300
 301       for (i = 0; i < number_of_symbols; i++)
 302         {
 303           sym = *symbol_table++;
 304           if (strcmp (sym->name, symname) == 0)
 305             {
 306               /* Bfd symbols are section relative.  */
 307               symaddr = sym->value + sym->section->vma;
 308               break;
 309             }
 310         }
 311       do_cleanups (back_to);
 312     }
 313   return (symaddr);
 314 }
 315
 316
 317 /* This hook gets called just before the first instruction in the
 318    inferior process is executed.
 319
 320    This is our opportunity to set magic flags in the inferior so
 321    that GDB can be notified when a shared library is mapped in and
 322    to tell the dynamic linker that a private copy of the library is
 323    needed (so GDB can set breakpoints in the library).
 324
 325    We need to set DT_HP_DEBUG_CALLBACK to indicate that we want the
 326    dynamic linker to call the breakpoint routine for significant events.
 327    We used to set DT_HP_DEBUG_PRIVATE to indicate that shared libraries
 328    should be mapped private.  However, this flag can be set using
 329    "chatr +dbg enable".  Not setting DT_HP_DEBUG_PRIVATE allows debugging
 330    with shared libraries mapped shareable.  */
 331
 332 static void
 333 pa64_solib_create_inferior_hook (int from_tty)
 334 {
 335   struct minimal_symbol *msymbol;
 336   unsigned int dld_flags, status;
 337   asection *shlib_info, *interp_sect;
 338   char buf[4];
 339   struct objfile *objfile;
 340   CORE_ADDR anaddr;
 341
 342   if (symfile_objfile == NULL)
 343     return;
 344
 345   /* First see if the objfile was dynamically linked.  */
 346   shlib_info = bfd_get_section_by_name (symfile_objfile->obfd, ".dynamic");
 347   if (!shlib_info)
 348     return;
 349
 350   /* It's got a .dynamic section, make sure it's not empty.  */
 351   if (bfd_section_size (symfile_objfile->obfd, shlib_info) == 0)
 352     return;
 353
 354   /* Read in the .dynamic section.  */
 355   if (! read_dynamic_info (shlib_info, &dld_cache))
 356     error (_("Unable to read the .dynamic section."));
 357
 358   /* If the libraries were not mapped private, warn the user.  */
 359   if ((dld_cache.dld_flags & DT_HP_DEBUG_PRIVATE) == 0)
 360     warning
 361       (_("\
 362 Private mapping of shared library text was not specified\n\
 363 by the executable; setting a breakpoint in a shared library which\n\
 364 is not privately mapped will not work.  See the HP-UX 11i v3 chatr\n\
 365 manpage for methods to privately map shared library text."));
 366
 367   /* Turn on the flags we care about.  */
 368   dld_cache.dld_flags |= DT_HP_DEBUG_CALLBACK;
 369   status = target_write_memory (dld_cache.dld_flags_addr,
 370                                 (char *) &dld_cache.dld_flags,
 371                                 sizeof (dld_cache.dld_flags));
 372   if (status != 0)
 373     error (_("Unable to modify dynamic linker flags."));
 374
 375   /* Now we have to create a shared library breakpoint in the dynamic
 376      linker.  This can be somewhat tricky since the symbol is inside
 377      the dynamic linker (for which we do not have symbols or a base
 378      load address!   Luckily I wrote this code for solib.c years ago.  */
 379   interp_sect = bfd_get_section_by_name (exec_bfd, ".interp");
 380   if (interp_sect)
 381     {
 382       unsigned int interp_sect_size;
 383       char *buf;
 384       CORE_ADDR load_addr;
 385       bfd *tmp_bfd;
 386       CORE_ADDR sym_addr = 0;
 387
 388       /* Read the contents of the .interp section into a local buffer;
 389          the contents specify the dynamic linker this program uses.  */
 390       interp_sect_size = bfd_section_size (exec_bfd, interp_sect);
 391       buf = alloca (interp_sect_size);
 392       bfd_get_section_contents (exec_bfd, interp_sect,
 393                                 buf, 0, interp_sect_size);
 394
 395       /* Now we need to figure out where the dynamic linker was
 396          loaded so that we can load its symbols and place a breakpoint
 397          in the dynamic linker itself.
 398
 399          This address is stored on the stack.  However, I've been unable
 400          to find any magic formula to find it for Solaris (appears to
 401          be trivial on GNU/Linux).  Therefore, we have to try an alternate
 402          mechanism to find the dynamic linker's base address.  */
 403       tmp_bfd = bfd_openr (buf, gnutarget);
 404       if (tmp_bfd == NULL)
 405         return;
 406
 407       /* Make sure the dynamic linker's really a useful object.  */
 408       if (!bfd_check_format (tmp_bfd, bfd_object))
 409         {
 410           warning (_("Unable to grok dynamic linker %s as an object file"),
 411                    buf);
 412           bfd_close (tmp_bfd);
 413           return;
 414         }
 415
 416       /* We find the dynamic linker's base address by examining the
 417          current pc (which point at the entry point for the dynamic
 418          linker) and subtracting the offset of the entry point.
 419
 420          Also note the breakpoint is the second instruction in the
 421          routine.  */
 422       load_addr = regcache_read_pc (get_current_regcache ())
 423                   - tmp_bfd->start_address;
 424       sym_addr = bfd_lookup_symbol (tmp_bfd, "__dld_break");
 425       sym_addr = load_addr + sym_addr + 4;
 426
 427       /* Create the shared library breakpoint.  */
 428       {
 429         struct breakpoint *b
 430           = create_solib_event_breakpoint (target_gdbarch, sym_addr);
 431
 432         /* The breakpoint is actually hard-coded into the dynamic linker,
 433            so we don't need to actually insert a breakpoint instruction
 434            there.  In fact, the dynamic linker's code is immutable, even to
 435            ttrace, so we shouldn't even try to do that.  For cases like
 436            this, we have "permanent" breakpoints.  */
 437         make_breakpoint_permanent (b);
 438       }
 439
 440       /* We're done with the temporary bfd.  */
 441       bfd_close (tmp_bfd);
 442     }
 443 }
 444
 445 static void
 446 pa64_special_symbol_handling (void)
 447 {
 448 }
 449
 450 static struct so_list *
 451 pa64_current_sos (void)
 452 {
 453   struct so_list *head = 0;
 454   struct so_list **link_ptr = &head;
 455   int dll_index;
 456
 457   /* Read in the load map pointer if we have not done so already.  */
 458   if (! dld_cache.have_read_dld_descriptor)
 459     if (! read_dld_descriptor ())
 460       return NULL;
 461
 462   for (dll_index = -1; ; dll_index++)
 463     {
 464       struct load_module_desc dll_desc;
 465       char *dll_path;
 466       struct so_list *new;
 467       struct cleanup *old_chain;
 468
 469       if (dll_index == 0)
 470         continue;
 471
 472       /* Read in the load module descriptor.  */
 473       if (dlgetmodinfo (dll_index, &dll_desc, sizeof (dll_desc),
 474                         pa64_target_read_memory, 0, dld_cache.load_map)
 475           == 0)
 476         break;
 477
 478       /* Get the name of the shared library.  */
 479       dll_path = (char *)dlgetname (&dll_desc, sizeof (dll_desc),
 480                             pa64_target_read_memory,
 481                             0, dld_cache.load_map);
 482
 483       new = (struct so_list *) xmalloc (sizeof (struct so_list));
 484       memset (new, 0, sizeof (struct so_list));
 485       new->lm_info = (struct lm_info *) xmalloc (sizeof (struct lm_info));
 486       memset (new->lm_info, 0, sizeof (struct lm_info));
 487
 488       strncpy (new->so_name, dll_path, SO_NAME_MAX_PATH_SIZE - 1);
 489       new->so_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0';
 490       strcpy (new->so_original_name, new->so_name);
 491
 492       memcpy (&new->lm_info->desc, &dll_desc, sizeof (dll_desc));
 493
 494 #ifdef SOLIB_PA64_DBG
 495       {
 496         struct load_module_desc *d = &new->lm_info->desc;
 497
 498         printf ("\n+ library \"%s\" is described at index %d\n", new->so_name,
 499                 dll_index);
 500         printf ("    text_base = %s\n", hex_string (d->text_base));
 501         printf ("    text_size = %s\n", hex_string (d->text_size));
 502         printf ("    data_base = %s\n", hex_string (d->data_base));
 503         printf ("    data_size = %s\n", hex_string (d->data_size));
 504         printf ("    unwind_base = %s\n", hex_string (d->unwind_base));
 505         printf ("    linkage_ptr = %s\n", hex_string (d->linkage_ptr));
 506         printf ("    phdr_base = %s\n", hex_string (d->phdr_base));
 507         printf ("    tls_size = %s\n", hex_string (d->tls_size));
 508         printf ("    tls_start_addr = %s\n", hex_string (d->tls_start_addr));
 509         printf ("    unwind_size = %s\n", hex_string (d->unwind_size));
 510         printf ("    tls_index = %s\n", hex_string (d->tls_index));
 511       }
 512 #endif
 513
 514       /* Link the new object onto the list.  */
 515       new->next = NULL;
 516       *link_ptr = new;
 517       link_ptr = &new->next;
 518     }
 519
 520   return head;
 521 }
 522
 523 static int
 524 pa64_open_symbol_file_object (void *from_ttyp)
 525 {
 526   int from_tty = *(int *)from_ttyp;
 527   char buf[4];
 528   struct load_module_desc dll_desc;
 529   char *dll_path;
 530
 531   if (symfile_objfile)
 532     if (!query (_("Attempt to reload symbols from process? ")))
 533       return 0;
 534
 535   /* Read in the load map pointer if we have not done so already.  */
 536   if (! dld_cache.have_read_dld_descriptor)
 537     if (! read_dld_descriptor ())
 538       return 0;
 539
 540   /* Read in the load module descriptor.  */
 541   if (dlgetmodinfo (0, &dll_desc, sizeof (dll_desc),
 542                     pa64_target_read_memory, 0, dld_cache.load_map) == 0)
 543     return 0;
 544
 545   /* Get the name of the shared library.  */
 546   dll_path = (char *)dlgetname (&dll_desc, sizeof (dll_desc),
 547                                 pa64_target_read_memory,
 548                                 0, dld_cache.load_map);
 549
 550   /* Have a pathname: read the symbol file.  */
 551   symbol_file_add_main (dll_path, from_tty);
 552
 553   return 1;
 554 }
 555
 556 /* Return nonzero if PC is an address inside the dynamic linker.  */
 557 static int
 558 pa64_in_dynsym_resolve_code (CORE_ADDR pc)
 559 {
 560   asection *shlib_info;
 561
 562   if (symfile_objfile == NULL)
 563     return 0;
 564
 565   if (!dld_cache.have_read_dld_descriptor)
 566     if (!read_dld_descriptor ())
 567       return 0;
 568
 569   return (pc >= dld_cache.dld_desc.text_base
 570           && pc < dld_cache.dld_desc.text_base + dld_cache.dld_desc.text_size);
 571 }
 572
 573
 574 /* Return the GOT value for the shared library in which ADDR belongs.  If
 575    ADDR isn't in any known shared library, return zero.  */
 576
 577 static CORE_ADDR
 578 pa64_solib_get_got_by_pc (CORE_ADDR addr)
 579 {
 580   struct so_list *so_list = master_so_list ();
 581   CORE_ADDR got_value = 0;
 582
 583   while (so_list)
 584     {
 585       if (so_list->lm_info->desc.text_base <= addr
 586           && ((so_list->lm_info->desc.text_base
 587                + so_list->lm_info->desc.text_size)
 588               > addr))
 589         {
 590           got_value = so_list->lm_info->desc.linkage_ptr;
 591           break;
 592         }
 593       so_list = so_list->next;
 594     }
 595   return got_value;
 596 }
 597
 598 /* Get some HPUX-specific data from a shared lib.  */
 599 static CORE_ADDR
 600 pa64_solib_thread_start_addr (struct so_list *so)
 601 {
 602   return so->lm_info->desc.tls_start_addr;
 603 }
 604
 605
 606 /* Return the address of the handle of the shared library in which ADDR
 607    belongs.  If ADDR isn't in any known shared library, return zero.  */
 608
 609 static CORE_ADDR
 610 pa64_solib_get_solib_by_pc (CORE_ADDR addr)
 611 {
 612   struct so_list *so_list = master_so_list ();
 613   CORE_ADDR retval = 0;
 614
 615   while (so_list)
 616     {
 617       if (so_list->lm_info->desc.text_base <= addr
 618           && ((so_list->lm_info->desc.text_base
 619                + so_list->lm_info->desc.text_size)
 620               > addr))
 621         {
 622           retval = so_list->lm_info->desc_addr;
 623           break;
 624         }
 625       so_list = so_list->next;
 626     }
 627   return retval;
 628 }
 629
 630 /* pa64 libraries do not seem to set the section offsets in a standard (i.e.
 631    SVr4) way; the text section offset stored in the file doesn't correspond
 632    to the place where the library is actually loaded into memory.  Instead,
 633    we rely on the dll descriptor to tell us where things were loaded.  */
 634 static CORE_ADDR
 635 pa64_solib_get_text_base (struct objfile *objfile)
 636 {
 637   struct so_list *so;
 638
 639   for (so = master_so_list (); so; so = so->next)
 640     if (so->objfile == objfile)
 641       return so->lm_info->desc.text_base;
 642
 643   return 0;
 644 }
 645
 646 static struct target_so_ops pa64_so_ops;
 647
 648 extern initialize_file_ftype _initialize_pa64_solib; /* -Wmissing-prototypes */
 649
 650 void
 651 _initialize_pa64_solib (void)
 652 {
 653   pa64_so_ops.relocate_section_addresses = pa64_relocate_section_addresses;
 654   pa64_so_ops.free_so = pa64_free_so;
 655   pa64_so_ops.clear_solib = pa64_clear_solib;
 656   pa64_so_ops.solib_create_inferior_hook = pa64_solib_create_inferior_hook;
 657   pa64_so_ops.special_symbol_handling = pa64_special_symbol_handling;
 658   pa64_so_ops.current_sos = pa64_current_sos;
 659   pa64_so_ops.open_symbol_file_object = pa64_open_symbol_file_object;
 660   pa64_so_ops.in_dynsym_resolve_code = pa64_in_dynsym_resolve_code;
 661   pa64_so_ops.bfd_open = solib_bfd_open;
 662
 663   memset (&dld_cache, 0, sizeof (dld_cache));
 664 }
 665
 666 void pa64_solib_select (struct gdbarch *gdbarch)
 667 {
 668   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
 669
 670   set_solib_ops (gdbarch, &pa64_so_ops);
 671   tdep->solib_thread_start_addr = pa64_solib_thread_start_addr;
 672   tdep->solib_get_got_by_pc = pa64_solib_get_got_by_pc;
 673   tdep->solib_get_solib_by_pc = pa64_solib_get_solib_by_pc;
 674   tdep->solib_get_text_base = pa64_solib_get_text_base;
 675 }
 676
 677 #else /* HAVE_ELF_HP_H */
 678
 679 extern initialize_file_ftype _initialize_pa64_solib; /* -Wmissing-prototypes */
 680
 681 void
 682 _initialize_pa64_solib (void)
 683 {
 684 }
 685
 686 void pa64_solib_select (struct gdbarch *gdbarch)
 687 {
 688   /* For a SOM-only target, there is no pa64 solib support.  This is needed
 689      for hppa-hpux-tdep.c to build.  */
 690   error (_("Cannot select pa64 solib support for this configuration."));
 691 }
 692 #endif