gdb/solib-irix.c

   1 /* Shared library support for IRIX.
   2    Copyright (C) 1993-2014 Free Software Foundation, Inc.
   3
   4    This file was created using portions of irix5-nat.c originally
   5    contributed to GDB by Ian Lance Taylor.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  21
  22 #include "defs.h"
  23
  24 #include "symtab.h"
  25 #include "bfd.h"
  26 /* FIXME: ezannoni/2004-02-13 Verify that the include below is
  27    really needed.  */
  28 #include "symfile.h"
  29 #include "objfiles.h"
  30 #include "gdbcore.h"
  31 #include "target.h"
  32 #include "inferior.h"
  33 #include "gdbthread.h"
  34
  35 #include "solist.h"
  36 #include "solib.h"
  37 #include "solib-irix.h"
  38
  39
  40 /* Link map info to include in an allocate so_list entry.  Unlike some
  41    of the other solib backends, this (Irix) backend chooses to decode
  42    the link map info obtained from the target and store it as (mostly)
  43    CORE_ADDRs which need no further decoding.  This is more convenient
  44    because there are three different link map formats to worry about.
  45    We use a single routine (fetch_lm_info) to read (and decode) the target
  46    specific link map data.  */
  47
  48 struct lm_info
  49 {
  50   CORE_ADDR addr;               /* address of obj_info or obj_list
  51                                    struct on target (from which the
  52                                    following information is obtained).  */
  53   CORE_ADDR next;               /* address of next item in list.  */
  54   CORE_ADDR reloc_offset;       /* amount to relocate by  */
  55   CORE_ADDR pathname_addr;      /* address of pathname  */
  56   int pathname_len;             /* length of pathname */
  57 };
  58
  59 /* It's not desirable to use the system header files to obtain the
  60    structure of the obj_list or obj_info structs.  Therefore, we use a
  61    platform neutral representation which has been derived from the IRIX
  62    header files.  */
  63
  64 typedef struct
  65 {
  66   gdb_byte b[4];
  67 }
  68 gdb_int32_bytes;
  69 typedef struct
  70 {
  71   gdb_byte b[8];
  72 }
  73 gdb_int64_bytes;
  74
  75 /* The "old" obj_list struct.  This is used with old (o32) binaries.
  76    The ``data'' member points at a much larger and more complicated
  77    struct which we will only refer to by offsets.  See
  78    fetch_lm_info().  */
  79
  80 struct irix_obj_list
  81 {
  82   gdb_int32_bytes data;
  83   gdb_int32_bytes next;
  84   gdb_int32_bytes prev;
  85 };
  86
  87 /* The ELF32 and ELF64 versions of the above struct.  The oi_magic value
  88    corresponds to the ``data'' value in the "old" struct.  When this value
  89    is 0xffffffff, the data will be in one of the following formats.  The
  90    ``oi_size'' field is used to decide which one we actually have.  */
  91
  92 struct irix_elf32_obj_info
  93 {
  94   gdb_int32_bytes oi_magic;
  95   gdb_int32_bytes oi_size;
  96   gdb_int32_bytes oi_next;
  97   gdb_int32_bytes oi_prev;
  98   gdb_int32_bytes oi_ehdr;
  99   gdb_int32_bytes oi_orig_ehdr;
 100   gdb_int32_bytes oi_pathname;
 101   gdb_int32_bytes oi_pathname_len;
 102 };
 103
 104 struct irix_elf64_obj_info
 105 {
 106   gdb_int32_bytes oi_magic;
 107   gdb_int32_bytes oi_size;
 108   gdb_int64_bytes oi_next;
 109   gdb_int64_bytes oi_prev;
 110   gdb_int64_bytes oi_ehdr;
 111   gdb_int64_bytes oi_orig_ehdr;
 112   gdb_int64_bytes oi_pathname;
 113   gdb_int32_bytes oi_pathname_len;
 114   gdb_int32_bytes padding;
 115 };
 116
 117 /* Union of all of the above (plus a split out magic field).  */
 118
 119 union irix_obj_info
 120 {
 121   gdb_int32_bytes magic;
 122   struct irix_obj_list ol32;
 123   struct irix_elf32_obj_info oi32;
 124   struct irix_elf64_obj_info oi64;
 125 };
 126
 127 /* MIPS sign extends its 32 bit addresses.  We could conceivably use
 128    extract_typed_address here, but to do so, we'd have to construct an
 129    appropriate type.  Calling extract_signed_integer seems simpler.  */
 130
 131 static CORE_ADDR
 132 extract_mips_address (void *addr, int len, enum bfd_endian byte_order)
 133 {
 134   return extract_signed_integer (addr, len, byte_order);
 135 }
 136
 137 /* Fetch and return the link map data associated with ADDR.  Note that
 138    this routine automatically determines which (of three) link map
 139    formats is in use by the target.  */
 140
 141 static struct lm_info
 142 fetch_lm_info (CORE_ADDR addr)
 143 {
 144   enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
 145   struct lm_info li;
 146   union irix_obj_info buf;
 147
 148   li.addr = addr;
 149
 150   /* The smallest region that we'll need is for buf.ol32.  We'll read
 151      that first.  We'll read more of the buffer later if we have to deal
 152      with one of the other cases.  (We don't want to incur a memory error
 153      if we were to read a larger region that generates an error due to
 154      being at the end of a page or the like.)  */
 155   read_memory (addr, (gdb_byte *) &buf, sizeof (buf.ol32));
 156
 157   if (extract_unsigned_integer (buf.magic.b, sizeof (buf.magic), byte_order)
 158       != 0xffffffff)
 159     {
 160       /* Use buf.ol32...  */
 161       gdb_byte obj_buf[432];
 162       CORE_ADDR obj_addr = extract_mips_address (&buf.ol32.data,
 163                                                  sizeof (buf.ol32.data),
 164                                                  byte_order);
 165
 166       li.next = extract_mips_address (&buf.ol32.next,
 167                                       sizeof (buf.ol32.next), byte_order);
 168
 169       read_memory (obj_addr, obj_buf, sizeof (obj_buf));
 170
 171       li.pathname_addr = extract_mips_address (&obj_buf[236], 4, byte_order);
 172       li.pathname_len = 0;      /* unknown */
 173       li.reloc_offset = extract_mips_address (&obj_buf[196], 4, byte_order)
 174         - extract_mips_address (&obj_buf[248], 4, byte_order);
 175
 176     }
 177   else if (extract_unsigned_integer (buf.oi32.oi_size.b,
 178                                      sizeof (buf.oi32.oi_size), byte_order)
 179            == sizeof (buf.oi32))
 180     {
 181       /* Use buf.oi32...  */
 182
 183       /* Read rest of buffer.  */
 184       read_memory (addr + sizeof (buf.ol32),
 185                    ((gdb_byte *) &buf) + sizeof (buf.ol32),
 186                    sizeof (buf.oi32) - sizeof (buf.ol32));
 187
 188       /* Fill in fields using buffer contents.  */
 189       li.next = extract_mips_address (&buf.oi32.oi_next,
 190                                       sizeof (buf.oi32.oi_next), byte_order);
 191       li.reloc_offset = extract_mips_address (&buf.oi32.oi_ehdr,
 192                                               sizeof (buf.oi32.oi_ehdr),
 193                                               byte_order)
 194         - extract_mips_address (&buf.oi32.oi_orig_ehdr,
 195                                 sizeof (buf.oi32.oi_orig_ehdr), byte_order);
 196       li.pathname_addr = extract_mips_address (&buf.oi32.oi_pathname,
 197                                                sizeof (buf.oi32.oi_pathname),
 198                                                byte_order);
 199       li.pathname_len = extract_unsigned_integer (buf.oi32.oi_pathname_len.b,
 200                                                   sizeof (buf.oi32.
 201                                                           oi_pathname_len),
 202                                                   byte_order);
 203     }
 204   else if (extract_unsigned_integer (buf.oi64.oi_size.b,
 205                                      sizeof (buf.oi64.oi_size), byte_order)
 206            == sizeof (buf.oi64))
 207     {
 208       /* Use buf.oi64...  */
 209
 210       /* Read rest of buffer.  */
 211       read_memory (addr + sizeof (buf.ol32),
 212                    ((gdb_byte *) &buf) + sizeof (buf.ol32),
 213                    sizeof (buf.oi64) - sizeof (buf.ol32));
 214
 215       /* Fill in fields using buffer contents.  */
 216       li.next = extract_mips_address (&buf.oi64.oi_next,
 217                                       sizeof (buf.oi64.oi_next), byte_order);
 218       li.reloc_offset = extract_mips_address (&buf.oi64.oi_ehdr,
 219                                               sizeof (buf.oi64.oi_ehdr),
 220                                               byte_order)
 221         - extract_mips_address (&buf.oi64.oi_orig_ehdr,
 222                                 sizeof (buf.oi64.oi_orig_ehdr), byte_order);
 223       li.pathname_addr = extract_mips_address (&buf.oi64.oi_pathname,
 224                                                sizeof (buf.oi64.oi_pathname),
 225                                                byte_order);
 226       li.pathname_len = extract_unsigned_integer (buf.oi64.oi_pathname_len.b,
 227                                                   sizeof (buf.oi64.
 228                                                           oi_pathname_len),
 229                                                   byte_order);
 230     }
 231   else
 232     {
 233       error (_("Unable to fetch shared library obj_info or obj_list info."));
 234     }
 235
 236   return li;
 237 }
 238
 239 /* The symbol which starts off the list of shared libraries.  */
 240 #define DEBUG_BASE "__rld_obj_head"
 241
 242 static void *base_breakpoint;
 243
 244 static CORE_ADDR debug_base;    /* Base of dynamic linker structures.  */
 245
 246 /* Locate the base address of dynamic linker structs.
 247
 248    For both the SunOS and SVR4 shared library implementations, if the
 249    inferior executable has been linked dynamically, there is a single
 250    address somewhere in the inferior's data space which is the key to
 251    locating all of the dynamic linker's runtime structures.  This
 252    address is the value of the symbol defined by the macro DEBUG_BASE.
 253    The job of this function is to find and return that address, or to
 254    return 0 if there is no such address (the executable is statically
 255    linked for example).
 256
 257    For SunOS, the job is almost trivial, since the dynamic linker and
 258    all of it's structures are statically linked to the executable at
 259    link time.  Thus the symbol for the address we are looking for has
 260    already been added to the minimal symbol table for the executable's
 261    objfile at the time the symbol file's symbols were read, and all we
 262    have to do is look it up there.  Note that we explicitly do NOT want
 263    to find the copies in the shared library.
 264
 265    The SVR4 version is much more complicated because the dynamic linker
 266    and it's structures are located in the shared C library, which gets
 267    run as the executable's "interpreter" by the kernel.  We have to go
 268    to a lot more work to discover the address of DEBUG_BASE.  Because
 269    of this complexity, we cache the value we find and return that value
 270    on subsequent invocations.  Note there is no copy in the executable
 271    symbol tables.
 272
 273    Irix 5 is basically like SunOS.
 274
 275    Note that we can assume nothing about the process state at the time
 276    we need to find this address.  We may be stopped on the first instruc-
 277    tion of the interpreter (C shared library), the first instruction of
 278    the executable itself, or somewhere else entirely (if we attached
 279    to the process for example).  */
 280
 281 static CORE_ADDR
 282 locate_base (void)
 283 {
 284   struct minimal_symbol *msymbol;
 285   CORE_ADDR address = 0;
 286
 287   msymbol = lookup_minimal_symbol (DEBUG_BASE, NULL, symfile_objfile);
 288   if ((msymbol != NULL) && (SYMBOL_VALUE_ADDRESS (msymbol) != 0))
 289     {
 290       address = SYMBOL_VALUE_ADDRESS (msymbol);
 291     }
 292   return (address);
 293 }
 294
 295 /* Remove the "mapping changed" breakpoint.
 296
 297    Removes the breakpoint that gets hit when the dynamic linker
 298    completes a mapping change.  */
 299
 300 static int
 301 disable_break (void)
 302 {
 303   int status = 1;
 304
 305   /* Note that breakpoint address and original contents are in our address
 306      space, so we just need to write the original contents back.  */
 307
 308   if (deprecated_remove_raw_breakpoint (target_gdbarch (), base_breakpoint) != 0)
 309     {
 310       status = 0;
 311     }
 312
 313   base_breakpoint = NULL;
 314
 315   /* Note that it is possible that we have stopped at a location that
 316      is different from the location where we inserted our breakpoint.
 317      On mips-irix, we can actually land in __dbx_init(), so we should
 318      not check the PC against our breakpoint address here.  See procfs.c
 319      for more details.  */
 320
 321   return (status);
 322 }
 323
 324 /* Arrange for dynamic linker to hit breakpoint.
 325
 326    This functions inserts a breakpoint at the entry point of the
 327    main executable, where all shared libraries are mapped in.  */
 328
 329 static int
 330 enable_break (void)
 331 {
 332   if (symfile_objfile != NULL && has_stack_frames ())
 333     {
 334       struct frame_info *frame = get_current_frame ();
 335       struct address_space *aspace = get_frame_address_space (frame);
 336       CORE_ADDR entry_point;
 337
 338       if (!entry_point_address_query (&entry_point))
 339         return 0;
 340
 341       base_breakpoint = deprecated_insert_raw_breakpoint (target_gdbarch (),
 342                                                           aspace, entry_point);
 343
 344       if (base_breakpoint != NULL)
 345         return 1;
 346     }
 347
 348   return 0;
 349 }
 350
 351 /* Implement the "create_inferior_hook" target_solib_ops method.
 352
 353    For SunOS executables, this first instruction is typically the
 354    one at "_start", or a similar text label, regardless of whether
 355    the executable is statically or dynamically linked.  The runtime
 356    startup code takes care of dynamically linking in any shared
 357    libraries, once gdb allows the inferior to continue.
 358
 359    For SVR4 executables, this first instruction is either the first
 360    instruction in the dynamic linker (for dynamically linked
 361    executables) or the instruction at "start" for statically linked
 362    executables.  For dynamically linked executables, the system
 363    first exec's /lib/libc.so.N, which contains the dynamic linker,
 364    and starts it running.  The dynamic linker maps in any needed
 365    shared libraries, maps in the actual user executable, and then
 366    jumps to "start" in the user executable.
 367
 368    For both SunOS shared libraries, and SVR4 shared libraries, we
 369    can arrange to cooperate with the dynamic linker to discover the
 370    names of shared libraries that are dynamically linked, and the
 371    base addresses to which they are linked.
 372
 373    This function is responsible for discovering those names and
 374    addresses, and saving sufficient information about them to allow
 375    their symbols to be read at a later time.
 376
 377    FIXME
 378
 379    Between enable_break() and disable_break(), this code does not
 380    properly handle hitting breakpoints which the user might have
 381    set in the startup code or in the dynamic linker itself.  Proper
 382    handling will probably have to wait until the implementation is
 383    changed to use the "breakpoint handler function" method.
 384
 385    Also, what if child has exit()ed?  Must exit loop somehow.  */
 386
 387 static void
 388 irix_solib_create_inferior_hook (int from_tty)
 389 {
 390   struct inferior *inf;
 391   struct thread_info *tp;
 392
 393   inf = current_inferior ();
 394
 395   /* If we are attaching to the inferior, the shared libraries
 396      have already been mapped, so nothing more to do.  */
 397   if (inf->attach_flag)
 398     return;
 399
 400   /* Likewise when debugging from a core file, the shared libraries
 401      have already been mapped, so nothing more to do.  */
 402   if (!target_can_run (&current_target))
 403     return;
 404
 405   if (!enable_break ())
 406     {
 407       warning (_("shared library handler failed to enable breakpoint"));
 408       return;
 409     }
 410
 411   /* Now run the target.  It will eventually hit the breakpoint, at
 412      which point all of the libraries will have been mapped in and we
 413      can go groveling around in the dynamic linker structures to find
 414      out what we need to know about them.  */
 415
 416   tp = inferior_thread ();
 417
 418   clear_proceed_status ();
 419
 420   inf->control.stop_soon = STOP_QUIETLY;
 421   tp->suspend.stop_signal = GDB_SIGNAL_0;
 422
 423   do
 424     {
 425       target_resume (pid_to_ptid (-1), 0, tp->suspend.stop_signal);
 426       wait_for_inferior ();
 427     }
 428   while (tp->suspend.stop_signal != GDB_SIGNAL_TRAP);
 429
 430   /* We are now either at the "mapping complete" breakpoint (or somewhere
 431      else, a condition we aren't prepared to deal with anyway), so adjust
 432      the PC as necessary after a breakpoint, disable the breakpoint, and
 433      add any shared libraries that were mapped in.  */
 434
 435   if (!disable_break ())
 436     {
 437       warning (_("shared library handler failed to disable breakpoint"));
 438     }
 439
 440   /* solib_add will call reinit_frame_cache.
 441      But we are stopped in the startup code and we might not have symbols
 442      for the startup code, so heuristic_proc_start could be called
 443      and will put out an annoying warning.
 444      Delaying the resetting of stop_soon until after symbol loading
 445      suppresses the warning.  */
 446   solib_add ((char *) 0, 0, (struct target_ops *) 0, auto_solib_add);
 447   inf->control.stop_soon = NO_STOP_QUIETLY;
 448 }
 449
 450 /* Implement the "current_sos" target_so_ops method.  */
 451
 452 static struct so_list *
 453 irix_current_sos (void)
 454 {
 455   enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
 456   int addr_size = gdbarch_addr_bit (target_gdbarch ()) / TARGET_CHAR_BIT;
 457   CORE_ADDR lma;
 458   gdb_byte addr_buf[8];
 459   struct so_list *head = 0;
 460   struct so_list **link_ptr = &head;
 461   int is_first = 1;
 462   struct lm_info lm;
 463
 464   /* Make sure we've looked up the inferior's dynamic linker's base
 465      structure.  */
 466   if (!debug_base)
 467     {
 468       debug_base = locate_base ();
 469
 470       /* If we can't find the dynamic linker's base structure, this
 471          must not be a dynamically linked executable.  Hmm.  */
 472       if (!debug_base)
 473         return 0;
 474     }
 475
 476   read_memory (debug_base, addr_buf, addr_size);
 477   lma = extract_mips_address (addr_buf, addr_size, byte_order);
 478
 479   while (lma)
 480     {
 481       lm = fetch_lm_info (lma);
 482       if (!is_first)
 483         {
 484           int errcode;
 485           char *name_buf;
 486           int name_size;
 487           struct so_list *new
 488             = (struct so_list *) xmalloc (sizeof (struct so_list));
 489           struct cleanup *old_chain = make_cleanup (xfree, new);
 490
 491           memset (new, 0, sizeof (*new));
 492
 493           new->lm_info = xmalloc (sizeof (struct lm_info));
 494           make_cleanup (xfree, new->lm_info);
 495
 496           *new->lm_info = lm;
 497
 498           /* Extract this shared object's name.  */
 499           name_size = lm.pathname_len;
 500           if (name_size == 0)
 501             name_size = SO_NAME_MAX_PATH_SIZE - 1;
 502
 503           if (name_size >= SO_NAME_MAX_PATH_SIZE)
 504             {
 505               name_size = SO_NAME_MAX_PATH_SIZE - 1;
 506               warning (_("current_sos: truncating name of "
 507                          "%d characters to only %d characters"),
 508                        lm.pathname_len, name_size);
 509             }
 510
 511           target_read_string (lm.pathname_addr, &name_buf,
 512                               name_size, &errcode);
 513           if (errcode != 0)
 514             warning (_("Can't read pathname for load map: %s."),
 515                        safe_strerror (errcode));
 516           else
 517             {
 518               strncpy (new->so_name, name_buf, name_size);
 519               new->so_name[name_size] = '\0';
 520               xfree (name_buf);
 521               strcpy (new->so_original_name, new->so_name);
 522             }
 523
 524           new->next = 0;
 525           *link_ptr = new;
 526           link_ptr = &new->next;
 527
 528           discard_cleanups (old_chain);
 529         }
 530       is_first = 0;
 531       lma = lm.next;
 532     }
 533
 534   return head;
 535 }
 536
 537 /* Implement the "open_symbol_file_object" target_so_ops method.
 538
 539    If no open symbol file, attempt to locate and open the main symbol
 540    file.  On IRIX, this is the first link map entry.  If its name is
 541    here, we can open it.  Useful when attaching to a process without
 542    first loading its symbol file.  */
 543
 544 static int
 545 irix_open_symbol_file_object (void *from_ttyp)
 546 {
 547   enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
 548   int addr_size = gdbarch_addr_bit (target_gdbarch ()) / TARGET_CHAR_BIT;
 549   CORE_ADDR lma;
 550   gdb_byte addr_buf[8];
 551   struct lm_info lm;
 552   struct cleanup *cleanups;
 553   int errcode;
 554   int from_tty = *(int *) from_ttyp;
 555   char *filename;
 556
 557   if (symfile_objfile)
 558     if (!query (_("Attempt to reload symbols from process? ")))
 559       return 0;
 560
 561   if ((debug_base = locate_base ()) == 0)
 562     return 0;                   /* failed somehow...  */
 563
 564   /* First link map member should be the executable.  */
 565   read_memory (debug_base, addr_buf, addr_size);
 566   lma = extract_mips_address (addr_buf, addr_size, byte_order);
 567   if (lma == 0)
 568     return 0;                   /* failed somehow...  */
 569
 570   lm = fetch_lm_info (lma);
 571
 572   if (lm.pathname_addr == 0)
 573     return 0;                   /* No filename.  */
 574
 575   /* Now fetch the filename from target memory.  */
 576   target_read_string (lm.pathname_addr, &filename, SO_NAME_MAX_PATH_SIZE - 1,
 577                       &errcode);
 578
 579   if (errcode)
 580     {
 581       warning (_("failed to read exec filename from attached file: %s"),
 582                safe_strerror (errcode));
 583       return 0;
 584     }
 585
 586   cleanups = make_cleanup (xfree, filename);
 587   /* Have a pathname: read the symbol file.  */
 588   symbol_file_add_main (filename, from_tty);
 589
 590   do_cleanups (cleanups);
 591
 592   return 1;
 593 }
 594
 595 /* Implement the "special_symbol_handling" target_so_ops method.
 596
 597    For IRIX, there's nothing to do.  */
 598
 599 static void
 600 irix_special_symbol_handling (void)
 601 {
 602 }
 603
 604 /* Using the solist entry SO, relocate the addresses in SEC.  */
 605
 606 static void
 607 irix_relocate_section_addresses (struct so_list *so,
 608                                  struct target_section *sec)
 609 {
 610   sec->addr += so->lm_info->reloc_offset;
 611   sec->endaddr += so->lm_info->reloc_offset;
 612 }
 613
 614 /* Free the lm_info struct.  */
 615
 616 static void
 617 irix_free_so (struct so_list *so)
 618 {
 619   xfree (so->lm_info);
 620 }
 621
 622 /* Clear backend specific state.  */
 623
 624 static void
 625 irix_clear_solib (void)
 626 {
 627   debug_base = 0;
 628 }
 629
 630 /* Return 1 if PC lies in the dynamic symbol resolution code of the
 631    run time loader.  */
 632 static int
 633 irix_in_dynsym_resolve_code (CORE_ADDR pc)
 634 {
 635   return 0;
 636 }
 637
 638 struct target_so_ops irix_so_ops;
 639
 640 /* Provide a prototype to silence -Wmissing-prototypes.  */
 641 extern initialize_file_ftype _initialize_irix_solib;
 642
 643 void
 644 _initialize_irix_solib (void)
 645 {
 646   irix_so_ops.relocate_section_addresses = irix_relocate_section_addresses;
 647   irix_so_ops.free_so = irix_free_so;
 648   irix_so_ops.clear_solib = irix_clear_solib;
 649   irix_so_ops.solib_create_inferior_hook = irix_solib_create_inferior_hook;
 650   irix_so_ops.special_symbol_handling = irix_special_symbol_handling;
 651   irix_so_ops.current_sos = irix_current_sos;
 652   irix_so_ops.open_symbol_file_object = irix_open_symbol_file_object;
 653   irix_so_ops.in_dynsym_resolve_code = irix_in_dynsym_resolve_code;
 654   irix_so_ops.bfd_open = solib_bfd_open;
 655 }