gdb/solib-irix.c

   1 /* Shared library support for IRIX.
   2    Copyright (C) 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2004,
   3    2007 Free Software Foundation, Inc.
   4
   5    This file was created using portions of irix5-nat.c originally
   6    contributed to GDB by Ian Lance Taylor.
   7
   8    This file is part of GDB.
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  22
  23 #include "defs.h"
  24
  25 #include "symtab.h"
  26 #include "bfd.h"
  27 /* FIXME: ezannoni/2004-02-13 Verify that the include below is
  28    really needed.  */
  29 #include "symfile.h"
  30 #include "objfiles.h"
  31 #include "gdbcore.h"
  32 #include "target.h"
  33 #include "inferior.h"
  34
  35 #include "solist.h"
  36
  37 /* Link map info to include in an allocate so_list entry.  Unlike some
  38    of the other solib backends, this (Irix) backend chooses to decode
  39    the link map info obtained from the target and store it as (mostly)
  40    CORE_ADDRs which need no further decoding.  This is more convenient
  41    because there are three different link map formats to worry about.
  42    We use a single routine (fetch_lm_info) to read (and decode) the target
  43    specific link map data.  */
  44
  45 struct lm_info
  46 {
  47   CORE_ADDR addr;               /* address of obj_info or obj_list
  48                                    struct on target (from which the
  49                                    following information is obtained).  */
  50   CORE_ADDR next;               /* address of next item in list.  */
  51   CORE_ADDR reloc_offset;       /* amount to relocate by  */
  52   CORE_ADDR pathname_addr;      /* address of pathname  */
  53   int pathname_len;             /* length of pathname */
  54 };
  55
  56 /* It's not desirable to use the system header files to obtain the
  57    structure of the obj_list or obj_info structs.  Therefore, we use a
  58    platform neutral representation which has been derived from the IRIX
  59    header files.  */
  60
  61 typedef struct
  62 {
  63   gdb_byte b[4];
  64 }
  65 gdb_int32_bytes;
  66 typedef struct
  67 {
  68   gdb_byte b[8];
  69 }
  70 gdb_int64_bytes;
  71
  72 /* The "old" obj_list struct.  This is used with old (o32) binaries.
  73    The ``data'' member points at a much larger and more complicated
  74    struct which we will only refer to by offsets.  See
  75    fetch_lm_info().  */
  76
  77 struct irix_obj_list
  78 {
  79   gdb_int32_bytes data;
  80   gdb_int32_bytes next;
  81   gdb_int32_bytes prev;
  82 };
  83
  84 /* The ELF32 and ELF64 versions of the above struct.  The oi_magic value
  85    corresponds to the ``data'' value in the "old" struct.  When this value
  86    is 0xffffffff, the data will be in one of the following formats.  The
  87    ``oi_size'' field is used to decide which one we actually have.  */
  88
  89 struct irix_elf32_obj_info
  90 {
  91   gdb_int32_bytes oi_magic;
  92   gdb_int32_bytes oi_size;
  93   gdb_int32_bytes oi_next;
  94   gdb_int32_bytes oi_prev;
  95   gdb_int32_bytes oi_ehdr;
  96   gdb_int32_bytes oi_orig_ehdr;
  97   gdb_int32_bytes oi_pathname;
  98   gdb_int32_bytes oi_pathname_len;
  99 };
 100
 101 struct irix_elf64_obj_info
 102 {
 103   gdb_int32_bytes oi_magic;
 104   gdb_int32_bytes oi_size;
 105   gdb_int64_bytes oi_next;
 106   gdb_int64_bytes oi_prev;
 107   gdb_int64_bytes oi_ehdr;
 108   gdb_int64_bytes oi_orig_ehdr;
 109   gdb_int64_bytes oi_pathname;
 110   gdb_int32_bytes oi_pathname_len;
 111   gdb_int32_bytes padding;
 112 };
 113
 114 /* Union of all of the above (plus a split out magic field).  */
 115
 116 union irix_obj_info
 117 {
 118   gdb_int32_bytes magic;
 119   struct irix_obj_list ol32;
 120   struct irix_elf32_obj_info oi32;
 121   struct irix_elf64_obj_info oi64;
 122 };
 123
 124 /* MIPS sign extends its 32 bit addresses.  We could conceivably use
 125    extract_typed_address here, but to do so, we'd have to construct an
 126    appropriate type.  Calling extract_signed_integer seems simpler.  */
 127
 128 static CORE_ADDR
 129 extract_mips_address (void *addr, int len)
 130 {
 131   return extract_signed_integer (addr, len);
 132 }
 133
 134 /* Fetch and return the link map data associated with ADDR.  Note that
 135    this routine automatically determines which (of three) link map
 136    formats is in use by the target.  */
 137
 138 struct lm_info
 139 fetch_lm_info (CORE_ADDR addr)
 140 {
 141   struct lm_info li;
 142   union irix_obj_info buf;
 143
 144   li.addr = addr;
 145
 146   /* The smallest region that we'll need is for buf.ol32.  We'll read
 147      that first.  We'll read more of the buffer later if we have to deal
 148      with one of the other cases.  (We don't want to incur a memory error
 149      if we were to read a larger region that generates an error due to
 150      being at the end of a page or the like.)  */
 151   read_memory (addr, (char *) &buf, sizeof (buf.ol32));
 152
 153   if (extract_unsigned_integer (buf.magic.b, sizeof (buf.magic)) != 0xffffffff)
 154     {
 155       /* Use buf.ol32... */
 156       char obj_buf[432];
 157       CORE_ADDR obj_addr = extract_mips_address (&buf.ol32.data,
 158                                                  sizeof (buf.ol32.data));
 159       li.next = extract_mips_address (&buf.ol32.next, sizeof (buf.ol32.next));
 160
 161       read_memory (obj_addr, obj_buf, sizeof (obj_buf));
 162
 163       li.pathname_addr = extract_mips_address (&obj_buf[236], 4);
 164       li.pathname_len = 0;      /* unknown */
 165       li.reloc_offset = extract_mips_address (&obj_buf[196], 4)
 166         - extract_mips_address (&obj_buf[248], 4);
 167
 168     }
 169   else if (extract_unsigned_integer (buf.oi32.oi_size.b,
 170                                      sizeof (buf.oi32.oi_size))
 171            == sizeof (buf.oi32))
 172     {
 173       /* Use buf.oi32...  */
 174
 175       /* Read rest of buffer.  */
 176       read_memory (addr + sizeof (buf.ol32),
 177                    ((char *) &buf) + sizeof (buf.ol32),
 178                    sizeof (buf.oi32) - sizeof (buf.ol32));
 179
 180       /* Fill in fields using buffer contents.  */
 181       li.next = extract_mips_address (&buf.oi32.oi_next,
 182                                       sizeof (buf.oi32.oi_next));
 183       li.reloc_offset = extract_mips_address (&buf.oi32.oi_ehdr,
 184                                               sizeof (buf.oi32.oi_ehdr))
 185         - extract_mips_address (&buf.oi32.oi_orig_ehdr,
 186                                 sizeof (buf.oi32.oi_orig_ehdr));
 187       li.pathname_addr = extract_mips_address (&buf.oi32.oi_pathname,
 188                                                sizeof (buf.oi32.oi_pathname));
 189       li.pathname_len = extract_unsigned_integer (buf.oi32.oi_pathname_len.b,
 190                                                   sizeof (buf.oi32.
 191                                                           oi_pathname_len));
 192     }
 193   else if (extract_unsigned_integer (buf.oi64.oi_size.b,
 194                                      sizeof (buf.oi64.oi_size))
 195            == sizeof (buf.oi64))
 196     {
 197       /* Use buf.oi64...  */
 198
 199       /* Read rest of buffer.  */
 200       read_memory (addr + sizeof (buf.ol32),
 201                    ((char *) &buf) + sizeof (buf.ol32),
 202                    sizeof (buf.oi64) - sizeof (buf.ol32));
 203
 204       /* Fill in fields using buffer contents.  */
 205       li.next = extract_mips_address (&buf.oi64.oi_next,
 206                                       sizeof (buf.oi64.oi_next));
 207       li.reloc_offset = extract_mips_address (&buf.oi64.oi_ehdr,
 208                                               sizeof (buf.oi64.oi_ehdr))
 209         - extract_mips_address (&buf.oi64.oi_orig_ehdr,
 210                                 sizeof (buf.oi64.oi_orig_ehdr));
 211       li.pathname_addr = extract_mips_address (&buf.oi64.oi_pathname,
 212                                                sizeof (buf.oi64.oi_pathname));
 213       li.pathname_len = extract_unsigned_integer (buf.oi64.oi_pathname_len.b,
 214                                                   sizeof (buf.oi64.
 215                                                           oi_pathname_len));
 216     }
 217   else
 218     {
 219       error (_("Unable to fetch shared library obj_info or obj_list info."));
 220     }
 221
 222   return li;
 223 }
 224
 225 /* The symbol which starts off the list of shared libraries.  */
 226 #define DEBUG_BASE "__rld_obj_head"
 227
 228 static void *base_breakpoint;
 229
 230 static CORE_ADDR debug_base;    /* Base of dynamic linker structures */
 231
 232 /*
 233
 234    LOCAL FUNCTION
 235
 236    locate_base -- locate the base address of dynamic linker structs
 237
 238    SYNOPSIS
 239
 240    CORE_ADDR locate_base (void)
 241
 242    DESCRIPTION
 243
 244    For both the SunOS and SVR4 shared library implementations, if the
 245    inferior executable has been linked dynamically, there is a single
 246    address somewhere in the inferior's data space which is the key to
 247    locating all of the dynamic linker's runtime structures.  This
 248    address is the value of the symbol defined by the macro DEBUG_BASE.
 249    The job of this function is to find and return that address, or to
 250    return 0 if there is no such address (the executable is statically
 251    linked for example).
 252
 253    For SunOS, the job is almost trivial, since the dynamic linker and
 254    all of it's structures are statically linked to the executable at
 255    link time.  Thus the symbol for the address we are looking for has
 256    already been added to the minimal symbol table for the executable's
 257    objfile at the time the symbol file's symbols were read, and all we
 258    have to do is look it up there.  Note that we explicitly do NOT want
 259    to find the copies in the shared library.
 260
 261    The SVR4 version is much more complicated because the dynamic linker
 262    and it's structures are located in the shared C library, which gets
 263    run as the executable's "interpreter" by the kernel.  We have to go
 264    to a lot more work to discover the address of DEBUG_BASE.  Because
 265    of this complexity, we cache the value we find and return that value
 266    on subsequent invocations.  Note there is no copy in the executable
 267    symbol tables.
 268
 269    Irix 5 is basically like SunOS.
 270
 271    Note that we can assume nothing about the process state at the time
 272    we need to find this address.  We may be stopped on the first instruc-
 273    tion of the interpreter (C shared library), the first instruction of
 274    the executable itself, or somewhere else entirely (if we attached
 275    to the process for example).
 276
 277  */
 278
 279 static CORE_ADDR
 280 locate_base (void)
 281 {
 282   struct minimal_symbol *msymbol;
 283   CORE_ADDR address = 0;
 284
 285   msymbol = lookup_minimal_symbol (DEBUG_BASE, NULL, symfile_objfile);
 286   if ((msymbol != NULL) && (SYMBOL_VALUE_ADDRESS (msymbol) != 0))
 287     {
 288       address = SYMBOL_VALUE_ADDRESS (msymbol);
 289     }
 290   return (address);
 291 }
 292
 293 /*
 294
 295    LOCAL FUNCTION
 296
 297    disable_break -- remove the "mapping changed" breakpoint
 298
 299    SYNOPSIS
 300
 301    static int disable_break ()
 302
 303    DESCRIPTION
 304
 305    Removes the breakpoint that gets hit when the dynamic linker
 306    completes a mapping change.
 307
 308  */
 309
 310 static int
 311 disable_break (void)
 312 {
 313   int status = 1;
 314
 315
 316   /* Note that breakpoint address and original contents are in our address
 317      space, so we just need to write the original contents back. */
 318
 319   if (deprecated_remove_raw_breakpoint (base_breakpoint) != 0)
 320     {
 321       status = 0;
 322     }
 323
 324   base_breakpoint = NULL;
 325
 326   /* Note that it is possible that we have stopped at a location that
 327      is different from the location where we inserted our breakpoint.
 328      On mips-irix, we can actually land in __dbx_init(), so we should
 329      not check the PC against our breakpoint address here.  See procfs.c
 330      for more details.  */
 331
 332   return (status);
 333 }
 334
 335 /*
 336
 337    LOCAL FUNCTION
 338
 339    enable_break -- arrange for dynamic linker to hit breakpoint
 340
 341    SYNOPSIS
 342
 343    int enable_break (void)
 344
 345    DESCRIPTION
 346
 347    This functions inserts a breakpoint at the entry point of the
 348    main executable, where all shared libraries are mapped in.
 349  */
 350
 351 static int
 352 enable_break (void)
 353 {
 354   if (symfile_objfile != NULL)
 355     {
 356       base_breakpoint
 357         = deprecated_insert_raw_breakpoint (entry_point_address ());
 358
 359       if (base_breakpoint != NULL)
 360         return 1;
 361     }
 362
 363   return 0;
 364 }
 365
 366 /*
 367
 368    LOCAL FUNCTION
 369
 370    irix_solib_create_inferior_hook -- shared library startup support
 371
 372    SYNOPSIS
 373
 374    void solib_create_inferior_hook ()
 375
 376    DESCRIPTION
 377
 378    When gdb starts up the inferior, it nurses it along (through the
 379    shell) until it is ready to execute it's first instruction.  At this
 380    point, this function gets called via expansion of the macro
 381    SOLIB_CREATE_INFERIOR_HOOK.
 382
 383    For SunOS executables, this first instruction is typically the
 384    one at "_start", or a similar text label, regardless of whether
 385    the executable is statically or dynamically linked.  The runtime
 386    startup code takes care of dynamically linking in any shared
 387    libraries, once gdb allows the inferior to continue.
 388
 389    For SVR4 executables, this first instruction is either the first
 390    instruction in the dynamic linker (for dynamically linked
 391    executables) or the instruction at "start" for statically linked
 392    executables.  For dynamically linked executables, the system
 393    first exec's /lib/libc.so.N, which contains the dynamic linker,
 394    and starts it running.  The dynamic linker maps in any needed
 395    shared libraries, maps in the actual user executable, and then
 396    jumps to "start" in the user executable.
 397
 398    For both SunOS shared libraries, and SVR4 shared libraries, we
 399    can arrange to cooperate with the dynamic linker to discover the
 400    names of shared libraries that are dynamically linked, and the
 401    base addresses to which they are linked.
 402
 403    This function is responsible for discovering those names and
 404    addresses, and saving sufficient information about them to allow
 405    their symbols to be read at a later time.
 406
 407    FIXME
 408
 409    Between enable_break() and disable_break(), this code does not
 410    properly handle hitting breakpoints which the user might have
 411    set in the startup code or in the dynamic linker itself.  Proper
 412    handling will probably have to wait until the implementation is
 413    changed to use the "breakpoint handler function" method.
 414
 415    Also, what if child has exit()ed?  Must exit loop somehow.
 416  */
 417
 418 static void
 419 irix_solib_create_inferior_hook (void)
 420 {
 421   if (!enable_break ())
 422     {
 423       warning (_("shared library handler failed to enable breakpoint"));
 424       return;
 425     }
 426
 427   /* Now run the target.  It will eventually hit the breakpoint, at
 428      which point all of the libraries will have been mapped in and we
 429      can go groveling around in the dynamic linker structures to find
 430      out what we need to know about them. */
 431
 432   clear_proceed_status ();
 433   stop_soon = STOP_QUIETLY;
 434   stop_signal = TARGET_SIGNAL_0;
 435   do
 436     {
 437       target_resume (pid_to_ptid (-1), 0, stop_signal);
 438       wait_for_inferior ();
 439     }
 440   while (stop_signal != TARGET_SIGNAL_TRAP);
 441
 442   /* We are now either at the "mapping complete" breakpoint (or somewhere
 443      else, a condition we aren't prepared to deal with anyway), so adjust
 444      the PC as necessary after a breakpoint, disable the breakpoint, and
 445      add any shared libraries that were mapped in. */
 446
 447   if (!disable_break ())
 448     {
 449       warning (_("shared library handler failed to disable breakpoint"));
 450     }
 451
 452   /* solib_add will call reinit_frame_cache.
 453      But we are stopped in the startup code and we might not have symbols
 454      for the startup code, so heuristic_proc_start could be called
 455      and will put out an annoying warning.
 456      Delaying the resetting of stop_soon until after symbol loading
 457      suppresses the warning.  */
 458   solib_add ((char *) 0, 0, (struct target_ops *) 0, auto_solib_add);
 459   stop_soon = NO_STOP_QUIETLY;
 460   re_enable_breakpoints_in_shlibs ();
 461 }
 462
 463 /* LOCAL FUNCTION
 464
 465    current_sos -- build a list of currently loaded shared objects
 466
 467    SYNOPSIS
 468
 469    struct so_list *current_sos ()
 470
 471    DESCRIPTION
 472
 473    Build a list of `struct so_list' objects describing the shared
 474    objects currently loaded in the inferior.  This list does not
 475    include an entry for the main executable file.
 476
 477    Note that we only gather information directly available from the
 478    inferior --- we don't examine any of the shared library files
 479    themselves.  The declaration of `struct so_list' says which fields
 480    we provide values for.  */
 481
 482 static struct so_list *
 483 irix_current_sos (void)
 484 {
 485   CORE_ADDR lma;
 486   char addr_buf[8];
 487   struct so_list *head = 0;
 488   struct so_list **link_ptr = &head;
 489   int is_first = 1;
 490   struct lm_info lm;
 491
 492   /* Make sure we've looked up the inferior's dynamic linker's base
 493      structure.  */
 494   if (!debug_base)
 495     {
 496       debug_base = locate_base ();
 497
 498       /* If we can't find the dynamic linker's base structure, this
 499          must not be a dynamically linked executable.  Hmm.  */
 500       if (!debug_base)
 501         return 0;
 502     }
 503
 504   read_memory (debug_base,
 505                addr_buf,
 506                gdbarch_addr_bit (current_gdbarch) / TARGET_CHAR_BIT);
 507   lma = extract_mips_address (addr_buf,
 508                               gdbarch_addr_bit (current_gdbarch)
 509                                 / TARGET_CHAR_BIT);
 510
 511   while (lma)
 512     {
 513       lm = fetch_lm_info (lma);
 514       if (!is_first)
 515         {
 516           int errcode;
 517           char *name_buf;
 518           int name_size;
 519           struct so_list *new
 520             = (struct so_list *) xmalloc (sizeof (struct so_list));
 521           struct cleanup *old_chain = make_cleanup (xfree, new);
 522
 523           memset (new, 0, sizeof (*new));
 524
 525           new->lm_info = xmalloc (sizeof (struct lm_info));
 526           make_cleanup (xfree, new->lm_info);
 527
 528           *new->lm_info = lm;
 529
 530           /* Extract this shared object's name.  */
 531           name_size = lm.pathname_len;
 532           if (name_size == 0)
 533             name_size = SO_NAME_MAX_PATH_SIZE - 1;
 534
 535           if (name_size >= SO_NAME_MAX_PATH_SIZE)
 536             {
 537               name_size = SO_NAME_MAX_PATH_SIZE - 1;
 538               warning
 539                 ("current_sos: truncating name of %d characters to only %d characters",
 540                  lm.pathname_len, name_size);
 541             }
 542
 543           target_read_string (lm.pathname_addr, &name_buf,
 544                               name_size, &errcode);
 545           if (errcode != 0)
 546             warning (_("Can't read pathname for load map: %s."),
 547                        safe_strerror (errcode));
 548           else
 549             {
 550               strncpy (new->so_name, name_buf, name_size);
 551               new->so_name[name_size] = '\0';
 552               xfree (name_buf);
 553               strcpy (new->so_original_name, new->so_name);
 554             }
 555
 556           new->next = 0;
 557           *link_ptr = new;
 558           link_ptr = &new->next;
 559
 560           discard_cleanups (old_chain);
 561         }
 562       is_first = 0;
 563       lma = lm.next;
 564     }
 565
 566   return head;
 567 }
 568
 569 /*
 570
 571   LOCAL FUNCTION
 572
 573   irix_open_symbol_file_object
 574
 575   SYNOPSIS
 576
 577   void irix_open_symbol_file_object (void *from_tty)
 578
 579   DESCRIPTION
 580
 581   If no open symbol file, attempt to locate and open the main symbol
 582   file.  On IRIX, this is the first link map entry.  If its name is
 583   here, we can open it.  Useful when attaching to a process without
 584   first loading its symbol file.
 585
 586   If FROM_TTYP dereferences to a non-zero integer, allow messages to
 587   be printed.  This parameter is a pointer rather than an int because
 588   open_symbol_file_object() is called via catch_errors() and
 589   catch_errors() requires a pointer argument. */
 590
 591 static int
 592 irix_open_symbol_file_object (void *from_ttyp)
 593 {
 594   CORE_ADDR lma;
 595   char addr_buf[8];
 596   struct lm_info lm;
 597   struct cleanup *cleanups;
 598   int errcode;
 599   int from_tty = *(int *) from_ttyp;
 600   char *filename;
 601
 602   if (symfile_objfile)
 603     if (!query ("Attempt to reload symbols from process? "))
 604       return 0;
 605
 606   if ((debug_base = locate_base ()) == 0)
 607     return 0;                   /* failed somehow...  */
 608
 609   /* First link map member should be the executable.  */
 610   read_memory (debug_base,
 611                addr_buf,
 612                gdbarch_addr_bit (current_gdbarch) / TARGET_CHAR_BIT);
 613   lma = extract_mips_address (addr_buf,
 614                               gdbarch_addr_bit (current_gdbarch)
 615                                 / TARGET_CHAR_BIT);
 616   if (lma == 0)
 617     return 0;                   /* failed somehow...  */
 618
 619   lm = fetch_lm_info (lma);
 620
 621   if (lm.pathname_addr == 0)
 622     return 0;                   /* No filename.  */
 623
 624   /* Now fetch the filename from target memory.  */
 625   target_read_string (lm.pathname_addr, &filename, SO_NAME_MAX_PATH_SIZE - 1,
 626                       &errcode);
 627
 628   if (errcode)
 629     {
 630       warning (_("failed to read exec filename from attached file: %s"),
 631                safe_strerror (errcode));
 632       return 0;
 633     }
 634
 635   cleanups = make_cleanup (xfree, filename);
 636   /* Have a pathname: read the symbol file.  */
 637   symbol_file_add_main (filename, from_tty);
 638
 639   do_cleanups (cleanups);
 640
 641   return 1;
 642 }
 643
 644
 645 /*
 646
 647    LOCAL FUNCTION
 648
 649    irix_special_symbol_handling -- additional shared library symbol handling
 650
 651    SYNOPSIS
 652
 653    void irix_special_symbol_handling ()
 654
 655    DESCRIPTION
 656
 657    Once the symbols from a shared object have been loaded in the usual
 658    way, we are called to do any system specific symbol handling that
 659    is needed.
 660
 661    For SunOS4, this consisted of grunging around in the dynamic
 662    linkers structures to find symbol definitions for "common" symbols
 663    and adding them to the minimal symbol table for the runtime common
 664    objfile.
 665
 666    However, for IRIX, there's nothing to do.
 667
 668  */
 669
 670 static void
 671 irix_special_symbol_handling (void)
 672 {
 673 }
 674
 675 /* Using the solist entry SO, relocate the addresses in SEC.  */
 676
 677 static void
 678 irix_relocate_section_addresses (struct so_list *so,
 679                                  struct section_table *sec)
 680 {
 681   sec->addr += so->lm_info->reloc_offset;
 682   sec->endaddr += so->lm_info->reloc_offset;
 683 }
 684
 685 /* Free the lm_info struct.  */
 686
 687 static void
 688 irix_free_so (struct so_list *so)
 689 {
 690   xfree (so->lm_info);
 691 }
 692
 693 /* Clear backend specific state.  */
 694
 695 static void
 696 irix_clear_solib (void)
 697 {
 698   debug_base = 0;
 699 }
 700
 701 /* Return 1 if PC lies in the dynamic symbol resolution code of the
 702    run time loader.  */
 703 static int
 704 irix_in_dynsym_resolve_code (CORE_ADDR pc)
 705 {
 706   return 0;
 707 }
 708
 709 static struct target_so_ops irix_so_ops;
 710
 711 void
 712 _initialize_irix_solib (void)
 713 {
 714   irix_so_ops.relocate_section_addresses = irix_relocate_section_addresses;
 715   irix_so_ops.free_so = irix_free_so;
 716   irix_so_ops.clear_solib = irix_clear_solib;
 717   irix_so_ops.solib_create_inferior_hook = irix_solib_create_inferior_hook;
 718   irix_so_ops.special_symbol_handling = irix_special_symbol_handling;
 719   irix_so_ops.current_sos = irix_current_sos;
 720   irix_so_ops.open_symbol_file_object = irix_open_symbol_file_object;
 721   irix_so_ops.in_dynsym_resolve_code = irix_in_dynsym_resolve_code;
 722
 723   /* FIXME: Don't do this here.  *_gdbarch_init() should set so_ops. */
 724   current_target_so_ops = &irix_so_ops;
 725 }