1 /* Handle SOM shared libraries.
3 Copyright (C) 2004, 2005, 2007, 2008, 2009, 2010
4 Free Software Foundation, Inc.
6 This file is part of GDB.
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.
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.
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/>. */
30 #include "hppa-tdep.h"
33 #include "solib-som.h"
35 #include <sys/utsname.h>
40 /* These ought to be defined in some public interface, but aren't. They
41 define the meaning of the various bits in the distinguished __dld_flags
42 variable that is declared in every debuggable a.out on HP-UX, and that
43 is shared between the debugger and the dynamic linker.
45 #define DLD_FLAGS_MAPPRIVATE 0x1
46 #define DLD_FLAGS_HOOKVALID 0x2
47 #define DLD_FLAGS_LISTVALID 0x4
48 #define DLD_FLAGS_BOR_ENABLE 0x8
52 /* Version of this structure (it is expected to change again in hpux10). */
53 unsigned char struct_version
;
55 /* Binding mode for this library. */
56 unsigned char bind_mode
;
58 /* Version of this library. */
59 short library_version
;
61 /* Start of text address,
62 link-time text location (length of text area),
63 end of text address. */
65 CORE_ADDR text_link_addr
;
68 /* Start of data, start of bss and end of data. */
73 /* Value of linkage pointer (%r19). */
76 /* Address in target of offset from thread-local register of
77 start of this thread's data. I.e., the first thread-local
78 variable in this shared library starts at *(tsd_start_addr)
79 from that area pointed to by cr27 (mpsfu_hi).
81 We do the indirection as soon as we read it, so from then
82 on it's the offset itself. */
83 CORE_ADDR tsd_start_addr
;
85 /* Address of the link map entry in the loader. */
89 /* These addresses should be filled in by som_solib_create_inferior_hook.
90 They are also used elsewhere in this module.
95 struct unwind_table_entry
*unwind
;
99 /* When adding fields, be sure to clear them in _initialize_som_solib. */
103 addr_and_unwind_t hook
;
104 addr_and_unwind_t hook_stub
;
105 addr_and_unwind_t load
;
106 addr_and_unwind_t load_stub
;
107 addr_and_unwind_t unload
;
108 addr_and_unwind_t unload2
;
109 addr_and_unwind_t unload_stub
;
114 som_relocate_section_addresses (struct so_list
*so
,
115 struct target_section
*sec
)
117 flagword aflag
= bfd_get_section_flags(so
->abfd
, sec
->the_bfd_section
);
119 if (aflag
& SEC_CODE
)
121 sec
->addr
+= so
->lm_info
->text_addr
- so
->lm_info
->text_link_addr
;
122 sec
->endaddr
+= so
->lm_info
->text_addr
- so
->lm_info
->text_link_addr
;
124 else if (aflag
& SEC_DATA
)
126 sec
->addr
+= so
->lm_info
->data_start
;
127 sec
->endaddr
+= so
->lm_info
->data_start
;
133 /* Get HP-UX major release number. Returns zero if the
134 release is not known. */
137 get_hpux_major_release (void)
139 static int hpux_major_release
= -1;
141 if (hpux_major_release
== -1)
147 p
= strchr (x
.release
, '.');
148 hpux_major_release
= p
? atoi (p
+ 1) : 0;
151 return hpux_major_release
;
154 /* DL header flag defines. */
155 #define SHLIB_TEXT_PRIVATE_ENABLE 0x4000
157 /* The DL header is documented in <shl.h>. We are only interested
158 in the flags field to determine whether the executable wants shared
159 libraries mapped private. */
165 /* This hook gets called just before the first instruction in the
166 inferior process is executed.
168 This is our opportunity to set magic flags in the inferior so
169 that GDB can be notified when a shared library is mapped in and
170 to tell the dynamic linker that a private copy of the library is
171 needed (so GDB can set breakpoints in the library).
173 __dld_flags is the location of the magic flags; as of this implementation
174 there are 3 flags of interest:
176 bit 0 when set indicates that private copies of the libraries are needed
177 bit 1 when set indicates that the callback hook routine is valid
178 bit 2 when set indicates that the dynamic linker should maintain the
179 __dld_list structure when loading/unloading libraries.
181 Note that shared libraries are not mapped in at this time, so we have
182 run the inferior until the libraries are mapped in. Typically this
183 means running until the "_start" is called. */
186 som_solib_create_inferior_hook (int from_tty
)
188 enum bfd_endian byte_order
= gdbarch_byte_order (target_gdbarch
);
189 struct minimal_symbol
*msymbol
;
190 unsigned int dld_flags
, status
, have_endo
;
191 asection
*shlib_info
;
195 if (symfile_objfile
== NULL
)
198 /* First see if the objfile was dynamically linked. */
199 shlib_info
= bfd_get_section_by_name (symfile_objfile
->obfd
, "$SHLIB_INFO$");
203 /* It's got a $SHLIB_INFO$ section, make sure it's not empty. */
204 if (bfd_section_size (symfile_objfile
->obfd
, shlib_info
) == 0)
207 /* Read the DL header. */
208 bfd_get_section_contents (symfile_objfile
->obfd
, shlib_info
,
209 (char *) &dl_header
, 0, sizeof (dl_header
));
212 /* Slam the pid of the process into __d_pid.
214 We used to warn when this failed, but that warning is only useful
215 on very old HP systems (hpux9 and older). The warnings are an
216 annoyance to users of modern systems and foul up the testsuite as
217 well. As a result, the warnings have been disabled. */
218 msymbol
= lookup_minimal_symbol ("__d_pid", NULL
, symfile_objfile
);
222 anaddr
= SYMBOL_VALUE_ADDRESS (msymbol
);
223 store_unsigned_integer (buf
, 4, byte_order
, PIDGET (inferior_ptid
));
224 status
= target_write_memory (anaddr
, buf
, 4);
228 Unable to write __d_pid.\n\
229 Suggest linking with /opt/langtools/lib/end.o.\n\
230 GDB will be unable to track shl_load/shl_unload calls"));
234 /* Get the value of _DLD_HOOK (an export stub) and put it in __dld_hook;
235 This will force the dynamic linker to call __d_trap when significant
238 Note that the above is the pre-HP-UX 9.0 behaviour. At 9.0 and above,
239 the dld provides an export stub named "__d_trap" as well as the
240 function named "__d_trap" itself, but doesn't provide "_DLD_HOOK".
241 We'll look first for the old flavor and then the new.
243 msymbol
= lookup_minimal_symbol ("_DLD_HOOK", NULL
, symfile_objfile
);
245 msymbol
= lookup_minimal_symbol ("__d_trap", NULL
, symfile_objfile
);
249 Unable to find _DLD_HOOK symbol in object file.\n\
250 Suggest linking with /opt/langtools/lib/end.o.\n\
251 GDB will be unable to track shl_load/shl_unload calls"));
254 anaddr
= SYMBOL_VALUE_ADDRESS (msymbol
);
255 dld_cache
.hook
.address
= anaddr
;
257 /* Grrr, this might not be an export symbol! We have to find the
259 msymbol
= hppa_lookup_stub_minimal_symbol (SYMBOL_LINKAGE_NAME (msymbol
),
263 anaddr
= SYMBOL_VALUE (msymbol
);
264 dld_cache
.hook_stub
.address
= anaddr
;
266 store_unsigned_integer (buf
, 4, byte_order
, anaddr
);
268 msymbol
= lookup_minimal_symbol ("__dld_hook", NULL
, symfile_objfile
);
272 Unable to find __dld_hook symbol in object file.\n\
273 Suggest linking with /opt/langtools/lib/end.o.\n\
274 GDB will be unable to track shl_load/shl_unload calls"));
277 anaddr
= SYMBOL_VALUE_ADDRESS (msymbol
);
278 status
= target_write_memory (anaddr
, buf
, 4);
280 /* Now set a shlib_event breakpoint at __d_trap so we can track
281 significant shared library events. */
282 msymbol
= lookup_minimal_symbol ("__d_trap", NULL
, symfile_objfile
);
286 Unable to find __dld_d_trap symbol in object file.\n\
287 Suggest linking with /opt/langtools/lib/end.o.\n\
288 GDB will be unable to track shl_load/shl_unload calls"));
291 create_solib_event_breakpoint (target_gdbarch
,
292 SYMBOL_VALUE_ADDRESS (msymbol
));
294 /* We have all the support usually found in end.o, so we can track
295 shl_load and shl_unload calls. */
300 /* Get the address of __dld_flags, if no such symbol exists, then we can
301 not debug the shared code. */
302 msymbol
= lookup_minimal_symbol ("__dld_flags", NULL
, NULL
);
305 error (_("Unable to find __dld_flags symbol in object file."));
308 anaddr
= SYMBOL_VALUE_ADDRESS (msymbol
);
310 /* Read the current contents. */
311 status
= target_read_memory (anaddr
, buf
, 4);
313 error (_("Unable to read __dld_flags."));
314 dld_flags
= extract_unsigned_integer (buf
, 4, byte_order
);
316 /* If the libraries were not mapped private on HP-UX 11 and later, warn
317 the user. On HP-UX 10 and earlier, there is no easy way to specify
318 that shared libraries should be privately mapped. So, we just force
320 if (get_hpux_major_release () >= 11
321 && (dl_header
.flags
& SHLIB_TEXT_PRIVATE_ENABLE
) == 0
322 && (dld_flags
& DLD_FLAGS_MAPPRIVATE
) == 0)
324 (_("Private mapping of shared library text was not specified\n"
325 "by the executable; setting a breakpoint in a shared library which\n"
326 "is not privately mapped will not work. See the HP-UX 11i v3 chatr\n"
327 "manpage for methods to privately map shared library text."));
329 /* Turn on the flags we care about. */
330 if (get_hpux_major_release () < 11)
331 dld_flags
|= DLD_FLAGS_MAPPRIVATE
;
333 dld_flags
|= DLD_FLAGS_HOOKVALID
;
334 store_unsigned_integer (buf
, 4, byte_order
, dld_flags
);
335 status
= target_write_memory (anaddr
, buf
, 4);
337 error (_("Unable to write __dld_flags."));
339 /* Now find the address of _start and set a breakpoint there.
340 We still need this code for two reasons:
342 * Not all sites have /opt/langtools/lib/end.o, so it's not always
343 possible to track the dynamic linker's events.
345 * At this time no events are triggered for shared libraries
346 loaded at startup time (what a crock). */
348 msymbol
= lookup_minimal_symbol ("_start", NULL
, symfile_objfile
);
350 error (_("Unable to find _start symbol in object file."));
352 anaddr
= SYMBOL_VALUE_ADDRESS (msymbol
);
354 /* Make the breakpoint at "_start" a shared library event breakpoint. */
355 create_solib_event_breakpoint (target_gdbarch
, anaddr
);
357 clear_symtab_users (0);
361 som_special_symbol_handling (void)
366 som_solib_desire_dynamic_linker_symbols (void)
368 struct objfile
*objfile
;
369 struct unwind_table_entry
*u
;
370 struct minimal_symbol
*dld_msymbol
;
372 /* Do we already know the value of these symbols? If so, then
375 (If you add clauses to this test, be sure to likewise update the
376 test within the loop.)
378 if (dld_cache
.is_valid
)
381 ALL_OBJFILES (objfile
)
383 dld_msymbol
= lookup_minimal_symbol ("shl_load", NULL
, objfile
);
384 if (dld_msymbol
!= NULL
)
386 dld_cache
.load
.address
= SYMBOL_VALUE (dld_msymbol
);
387 dld_cache
.load
.unwind
= find_unwind_entry (dld_cache
.load
.address
);
390 dld_msymbol
= lookup_minimal_symbol_solib_trampoline ("shl_load",
392 if (dld_msymbol
!= NULL
)
394 if (MSYMBOL_TYPE (dld_msymbol
) == mst_solib_trampoline
)
396 u
= find_unwind_entry (SYMBOL_VALUE (dld_msymbol
));
397 if ((u
!= NULL
) && (u
->stub_unwind
.stub_type
== EXPORT
))
399 dld_cache
.load_stub
.address
= SYMBOL_VALUE (dld_msymbol
);
400 dld_cache
.load_stub
.unwind
= u
;
405 dld_msymbol
= lookup_minimal_symbol ("shl_unload", NULL
, objfile
);
406 if (dld_msymbol
!= NULL
)
408 dld_cache
.unload
.address
= SYMBOL_VALUE (dld_msymbol
);
409 dld_cache
.unload
.unwind
= find_unwind_entry (dld_cache
.unload
.address
);
411 /* ??rehrauer: I'm not sure exactly what this is, but it appears
412 that on some HPUX 10.x versions, there's two unwind regions to
413 cover the body of "shl_unload", the second being 4 bytes past
414 the end of the first. This is a large hack to handle that
415 case, but since I don't seem to have any legitimate way to
416 look for this thing via the symbol table...
418 if (dld_cache
.unload
.unwind
!= NULL
)
420 u
= find_unwind_entry (dld_cache
.unload
.unwind
->region_end
+ 4);
423 dld_cache
.unload2
.address
= u
->region_start
;
424 dld_cache
.unload2
.unwind
= u
;
429 dld_msymbol
= lookup_minimal_symbol_solib_trampoline ("shl_unload",
431 if (dld_msymbol
!= NULL
)
433 if (MSYMBOL_TYPE (dld_msymbol
) == mst_solib_trampoline
)
435 u
= find_unwind_entry (SYMBOL_VALUE (dld_msymbol
));
436 if ((u
!= NULL
) && (u
->stub_unwind
.stub_type
== EXPORT
))
438 dld_cache
.unload_stub
.address
= SYMBOL_VALUE (dld_msymbol
);
439 dld_cache
.unload_stub
.unwind
= u
;
444 /* Did we find everything we were looking for? If so, stop. */
445 if ((dld_cache
.load
.address
!= 0)
446 && (dld_cache
.load_stub
.address
!= 0)
447 && (dld_cache
.unload
.address
!= 0)
448 && (dld_cache
.unload_stub
.address
!= 0))
450 dld_cache
.is_valid
= 1;
455 dld_cache
.hook
.unwind
= find_unwind_entry (dld_cache
.hook
.address
);
456 dld_cache
.hook_stub
.unwind
= find_unwind_entry (dld_cache
.hook_stub
.address
);
458 /* We're prepared not to find some of these symbols, which is why
459 this function is a "desire" operation, and not a "require".
464 som_in_dynsym_resolve_code (CORE_ADDR pc
)
466 struct unwind_table_entry
*u_pc
;
468 /* Are we in the dld itself?
470 ??rehrauer: Large hack -- We'll assume that any address in a
471 shared text region is the dld's text. This would obviously
472 fall down if the user attached to a process, whose shlibs
473 weren't mapped to a (writeable) private region. However, in
474 that case the debugger probably isn't able to set the fundamental
475 breakpoint in the dld callback anyways, so this hack should be
478 if ((pc
& (CORE_ADDR
) 0xc0000000) == (CORE_ADDR
) 0xc0000000)
481 /* Cache the address of some symbols that are part of the dynamic
482 linker, if not already known.
484 som_solib_desire_dynamic_linker_symbols ();
486 /* Are we in the dld callback? Or its export stub? */
487 u_pc
= find_unwind_entry (pc
);
491 if ((u_pc
== dld_cache
.hook
.unwind
) || (u_pc
== dld_cache
.hook_stub
.unwind
))
494 /* Or the interface of the dld (i.e., "shl_load" or friends)? */
495 if ((u_pc
== dld_cache
.load
.unwind
)
496 || (u_pc
== dld_cache
.unload
.unwind
)
497 || (u_pc
== dld_cache
.unload2
.unwind
)
498 || (u_pc
== dld_cache
.load_stub
.unwind
)
499 || (u_pc
== dld_cache
.unload_stub
.unwind
))
502 /* Apparently this address isn't part of the dld's text. */
507 som_clear_solib (void)
515 char text_link_addr
[4];
522 char tsd_start_addr_ptr
[4];
526 link_map_start (void)
528 enum bfd_endian byte_order
= gdbarch_byte_order (target_gdbarch
);
529 struct minimal_symbol
*sym
;
532 unsigned int dld_flags
;
534 sym
= lookup_minimal_symbol ("__dld_flags", NULL
, NULL
);
536 error (_("Unable to find __dld_flags symbol in object file."));
537 addr
= SYMBOL_VALUE_ADDRESS (sym
);
538 read_memory (addr
, buf
, 4);
539 dld_flags
= extract_unsigned_integer (buf
, 4, byte_order
);
540 if ((dld_flags
& DLD_FLAGS_LISTVALID
) == 0)
541 error (_("__dld_list is not valid according to __dld_flags."));
543 sym
= lookup_minimal_symbol ("__dld_list", NULL
, NULL
);
546 /* Older crt0.o files (hpux8) don't have __dld_list as a symbol,
547 but the data is still available if you know where to look. */
548 sym
= lookup_minimal_symbol ("__dld_flags", NULL
, NULL
);
551 error (_("Unable to find dynamic library list."));
554 addr
= SYMBOL_VALUE_ADDRESS (sym
) - 8;
557 addr
= SYMBOL_VALUE_ADDRESS (sym
);
559 read_memory (addr
, buf
, 4);
560 addr
= extract_unsigned_integer (buf
, 4, byte_order
);
564 read_memory (addr
, buf
, 4);
565 return extract_unsigned_integer (buf
, 4, byte_order
);
568 /* Does this so's name match the main binary? */
570 match_main (const char *name
)
572 return strcmp (name
, symfile_objfile
->name
) == 0;
575 static struct so_list
*
576 som_current_sos (void)
578 enum bfd_endian byte_order
= gdbarch_byte_order (target_gdbarch
);
580 struct so_list
*head
= 0;
581 struct so_list
**link_ptr
= &head
;
583 for (lm
= link_map_start (); lm
; )
588 struct cleanup
*old_chain
;
590 struct dld_list dbuf
;
593 new = (struct so_list
*) xmalloc (sizeof (struct so_list
));
594 old_chain
= make_cleanup (xfree
, new);
596 memset (new, 0, sizeof (*new));
597 new->lm_info
= xmalloc (sizeof (struct lm_info
));
598 make_cleanup (xfree
, new->lm_info
);
600 read_memory (lm
, (gdb_byte
*)&dbuf
, sizeof (struct dld_list
));
602 addr
= extract_unsigned_integer ((gdb_byte
*)&dbuf
.name
,
603 sizeof (dbuf
.name
), byte_order
);
604 target_read_string (addr
, &namebuf
, SO_NAME_MAX_PATH_SIZE
- 1, &errcode
);
606 warning (_("Can't read pathname for load map: %s."),
607 safe_strerror (errcode
));
610 strncpy (new->so_name
, namebuf
, SO_NAME_MAX_PATH_SIZE
- 1);
611 new->so_name
[SO_NAME_MAX_PATH_SIZE
- 1] = '\0';
613 strcpy (new->so_original_name
, new->so_name
);
616 if (new->so_name
[0] && !match_main (new->so_name
))
618 struct lm_info
*lmi
= new->lm_info
;
623 #define EXTRACT(_fld) \
624 extract_unsigned_integer ((gdb_byte *)&dbuf._fld, \
625 sizeof (dbuf._fld), byte_order);
627 lmi
->text_addr
= EXTRACT (text_addr
);
628 tmp
= EXTRACT (info
);
629 lmi
->library_version
= (tmp
>> 16) & 0xffff;
630 lmi
->bind_mode
= (tmp
>> 8) & 0xff;
631 lmi
->struct_version
= tmp
& 0xff;
632 lmi
->text_link_addr
= EXTRACT (text_link_addr
);
633 lmi
->text_end
= EXTRACT (text_end
);
634 lmi
->data_start
= EXTRACT (data_start
);
635 lmi
->bss_start
= EXTRACT (bss_start
);
636 lmi
->data_end
= EXTRACT (data_end
);
637 lmi
->got_value
= EXTRACT (got_value
);
638 tmp
= EXTRACT (tsd_start_addr_ptr
);
639 read_memory (tmp
, tsdbuf
, 4);
641 = extract_unsigned_integer (tsdbuf
, 4, byte_order
);
644 printf ("\n+ library \"%s\" is described at %s\n", new->so_name
,
645 paddress (target_gdbarch
, lm
));
646 printf (" 'version' is %d\n", new->lm_info
->struct_version
);
647 printf (" 'bind_mode' is %d\n", new->lm_info
->bind_mode
);
648 printf (" 'library_version' is %d\n",
649 new->lm_info
->library_version
);
650 printf (" 'text_addr' is %s\n",
651 paddress (target_gdbarch
, new->lm_info
->text_addr
));
652 printf (" 'text_link_addr' is %s\n",
653 paddress (target_gdbarch
, new->lm_info
->text_link_addr
));
654 printf (" 'text_end' is %s\n",
655 paddress (target_gdbarch
, new->lm_info
->text_end
));
656 printf (" 'data_start' is %s\n",
657 paddress (target_gdbarch
, new->lm_info
->data_start
));
658 printf (" 'bss_start' is %s\n",
659 paddress (target_gdbarch
, new->lm_info
->bss_start
));
660 printf (" 'data_end' is %s\n",
661 paddress (target_gdbarch
, new->lm_info
->data_end
));
662 printf (" 'got_value' is %s\n",
663 paddress (target_gdbarch
, new->lm_info
->got_value
));
664 printf (" 'tsd_start_addr' is %s\n",
665 paddress (target_gdbarch
, new->lm_info
->tsd_start_addr
));
668 new->addr_low
= lmi
->text_addr
;
669 new->addr_high
= lmi
->text_end
;
671 /* Link the new object onto the list. */
674 link_ptr
= &new->next
;
682 discard_cleanups (old_chain
);
686 /* TODO: The original somsolib code has logic to detect and eliminate
687 duplicate entries. Do we need that? */
693 som_open_symbol_file_object (void *from_ttyp
)
695 enum bfd_endian byte_order
= gdbarch_byte_order (target_gdbarch
);
696 CORE_ADDR lm
, l_name
;
699 int from_tty
= *(int *)from_ttyp
;
703 if (!query (_("Attempt to reload symbols from process? ")))
706 /* First link map member should be the executable. */
707 if ((lm
= link_map_start ()) == 0)
708 return 0; /* failed somehow... */
710 /* Read address of name from target memory to GDB. */
711 read_memory (lm
+ offsetof (struct dld_list
, name
), buf
, 4);
713 /* Convert the address to host format. Assume that the address is
715 l_name
= extract_unsigned_integer (buf
, 4, byte_order
);
718 return 0; /* No filename. */
720 /* Now fetch the filename from target memory. */
721 target_read_string (l_name
, &filename
, SO_NAME_MAX_PATH_SIZE
- 1, &errcode
);
725 warning (_("failed to read exec filename from attached file: %s"),
726 safe_strerror (errcode
));
730 make_cleanup (xfree
, filename
);
731 /* Have a pathname: read the symbol file. */
732 symbol_file_add_main (filename
, from_tty
);
738 som_free_so (struct so_list
*so
)
744 som_solib_thread_start_addr (struct so_list
*so
)
746 return so
->lm_info
->tsd_start_addr
;
749 /* Return the GOT value for the shared library in which ADDR belongs. If
750 ADDR isn't in any known shared library, return zero. */
753 som_solib_get_got_by_pc (CORE_ADDR addr
)
755 struct so_list
*so_list
= master_so_list ();
756 CORE_ADDR got_value
= 0;
760 if (so_list
->lm_info
->text_addr
<= addr
761 && so_list
->lm_info
->text_end
> addr
)
763 got_value
= so_list
->lm_info
->got_value
;
766 so_list
= so_list
->next
;
771 /* Return the address of the handle of the shared library in which ADDR belongs.
772 If ADDR isn't in any known shared library, return zero. */
773 /* this function is used in initialize_hp_cxx_exception_support in
777 som_solib_get_solib_by_pc (CORE_ADDR addr
)
779 struct so_list
*so_list
= master_so_list ();
783 if (so_list
->lm_info
->text_addr
<= addr
784 && so_list
->lm_info
->text_end
> addr
)
788 so_list
= so_list
->next
;
791 return so_list
->lm_info
->lm_addr
;
797 static struct target_so_ops som_so_ops
;
799 extern initialize_file_ftype _initialize_som_solib
; /* -Wmissing-prototypes */
802 _initialize_som_solib (void)
804 som_so_ops
.relocate_section_addresses
= som_relocate_section_addresses
;
805 som_so_ops
.free_so
= som_free_so
;
806 som_so_ops
.clear_solib
= som_clear_solib
;
807 som_so_ops
.solib_create_inferior_hook
= som_solib_create_inferior_hook
;
808 som_so_ops
.special_symbol_handling
= som_special_symbol_handling
;
809 som_so_ops
.current_sos
= som_current_sos
;
810 som_so_ops
.open_symbol_file_object
= som_open_symbol_file_object
;
811 som_so_ops
.in_dynsym_resolve_code
= som_in_dynsym_resolve_code
;
812 som_so_ops
.bfd_open
= solib_bfd_open
;
816 som_solib_select (struct gdbarch
*gdbarch
)
818 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
820 set_solib_ops (gdbarch
, &som_so_ops
);
821 tdep
->solib_thread_start_addr
= som_solib_thread_start_addr
;
822 tdep
->solib_get_got_by_pc
= som_solib_get_got_by_pc
;
823 tdep
->solib_get_solib_by_pc
= som_solib_get_solib_by_pc
;
826 /* The rest of these functions are not part of the solib interface; they
827 are used by somread.c or hppa-hpux-tdep.c */
830 som_solib_section_offsets (struct objfile
*objfile
,
831 struct section_offsets
*offsets
)
833 struct so_list
*so_list
= master_so_list ();
837 /* Oh what a pain! We need the offsets before so_list->objfile
838 is valid. The BFDs will never match. Make a best guess. */
839 if (strstr (objfile
->name
, so_list
->so_name
))
841 asection
*private_section
;
843 /* The text offset is easy. */
844 offsets
->offsets
[SECT_OFF_TEXT (objfile
)]
845 = (so_list
->lm_info
->text_addr
846 - so_list
->lm_info
->text_link_addr
);
847 offsets
->offsets
[SECT_OFF_RODATA (objfile
)]
848 = ANOFFSET (offsets
, SECT_OFF_TEXT (objfile
));
850 /* We should look at presumed_dp in the SOM header, but
851 that's not easily available. This should be OK though. */
852 private_section
= bfd_get_section_by_name (objfile
->obfd
,
854 if (!private_section
)
856 warning (_("Unable to find $PRIVATE$ in shared library!"));
857 offsets
->offsets
[SECT_OFF_DATA (objfile
)] = 0;
858 offsets
->offsets
[SECT_OFF_BSS (objfile
)] = 0;
861 offsets
->offsets
[SECT_OFF_DATA (objfile
)]
862 = (so_list
->lm_info
->data_start
- private_section
->vma
);
863 offsets
->offsets
[SECT_OFF_BSS (objfile
)]
864 = ANOFFSET (offsets
, SECT_OFF_DATA (objfile
));
867 so_list
= so_list
->next
;