1 /* Handle SOM shared libraries.
3 Copyright (C) 2004, 2005, 2007, 2008, 2009, 2010, 2011
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
54 unsigned char struct_version
;
56 /* Binding mode for this library. */
57 unsigned char bind_mode
;
59 /* Version of this library. */
60 short library_version
;
62 /* Start of text address,
63 link-time text location (length of text area),
64 end of text address. */
66 CORE_ADDR text_link_addr
;
69 /* Start of data, start of bss and end of data. */
74 /* Value of linkage pointer (%r19). */
77 /* Address in target of offset from thread-local register of
78 start of this thread's data. I.e., the first thread-local
79 variable in this shared library starts at *(tsd_start_addr)
80 from that area pointed to by cr27 (mpsfu_hi).
82 We do the indirection as soon as we read it, so from then
83 on it's the offset itself. */
84 CORE_ADDR tsd_start_addr
;
86 /* Address of the link map entry in the loader. */
90 /* These addresses should be filled in by som_solib_create_inferior_hook.
91 They are also used elsewhere in this module. */
96 struct unwind_table_entry
*unwind
;
100 /* When adding fields, be sure to clear them in _initialize_som_solib. */
104 addr_and_unwind_t hook
;
105 addr_and_unwind_t hook_stub
;
106 addr_and_unwind_t load
;
107 addr_and_unwind_t load_stub
;
108 addr_and_unwind_t unload
;
109 addr_and_unwind_t unload2
;
110 addr_and_unwind_t unload_stub
;
115 som_relocate_section_addresses (struct so_list
*so
,
116 struct target_section
*sec
)
118 flagword aflag
= bfd_get_section_flags(so
->abfd
, sec
->the_bfd_section
);
120 if (aflag
& SEC_CODE
)
122 sec
->addr
+= so
->lm_info
->text_addr
- so
->lm_info
->text_link_addr
;
123 sec
->endaddr
+= so
->lm_info
->text_addr
- so
->lm_info
->text_link_addr
;
125 else if (aflag
& SEC_DATA
)
127 sec
->addr
+= so
->lm_info
->data_start
;
128 sec
->endaddr
+= so
->lm_info
->data_start
;
134 /* Get HP-UX major release number. Returns zero if the
135 release is not known. */
138 get_hpux_major_release (void)
140 static int hpux_major_release
= -1;
142 if (hpux_major_release
== -1)
148 p
= strchr (x
.release
, '.');
149 hpux_major_release
= p
? atoi (p
+ 1) : 0;
152 return hpux_major_release
;
155 /* DL header flag defines. */
156 #define SHLIB_TEXT_PRIVATE_ENABLE 0x4000
158 /* The DL header is documented in <shl.h>. We are only interested
159 in the flags field to determine whether the executable wants shared
160 libraries mapped private. */
166 /* This hook gets called just before the first instruction in the
167 inferior process is executed.
169 This is our opportunity to set magic flags in the inferior so
170 that GDB can be notified when a shared library is mapped in and
171 to tell the dynamic linker that a private copy of the library is
172 needed (so GDB can set breakpoints in the library).
174 __dld_flags is the location of the magic flags; as of this implementation
175 there are 3 flags of interest:
177 bit 0 when set indicates that private copies of the libraries are needed
178 bit 1 when set indicates that the callback hook routine is valid
179 bit 2 when set indicates that the dynamic linker should maintain the
180 __dld_list structure when loading/unloading libraries.
182 Note that shared libraries are not mapped in at this time, so we have
183 run the inferior until the libraries are mapped in. Typically this
184 means running until the "_start" is called. */
187 som_solib_create_inferior_hook (int from_tty
)
189 enum bfd_endian byte_order
= gdbarch_byte_order (target_gdbarch
);
190 struct minimal_symbol
*msymbol
;
191 unsigned int dld_flags
, status
, have_endo
;
192 asection
*shlib_info
;
196 if (symfile_objfile
== NULL
)
199 /* First see if the objfile was dynamically linked. */
200 shlib_info
= bfd_get_section_by_name (symfile_objfile
->obfd
, "$SHLIB_INFO$");
204 /* It's got a $SHLIB_INFO$ section, make sure it's not empty. */
205 if (bfd_section_size (symfile_objfile
->obfd
, shlib_info
) == 0)
208 /* Read the DL header. */
209 bfd_get_section_contents (symfile_objfile
->obfd
, shlib_info
,
210 (char *) &dl_header
, 0, sizeof (dl_header
));
213 /* Slam the pid of the process into __d_pid.
215 We used to warn when this failed, but that warning is only useful
216 on very old HP systems (hpux9 and older). The warnings are an
217 annoyance to users of modern systems and foul up the testsuite as
218 well. As a result, the warnings have been disabled. */
219 msymbol
= lookup_minimal_symbol ("__d_pid", NULL
, symfile_objfile
);
223 anaddr
= SYMBOL_VALUE_ADDRESS (msymbol
);
224 store_unsigned_integer (buf
, 4, byte_order
, PIDGET (inferior_ptid
));
225 status
= target_write_memory (anaddr
, buf
, 4);
229 Unable to write __d_pid.\n\
230 Suggest linking with /opt/langtools/lib/end.o.\n\
231 GDB will be unable to track shl_load/shl_unload calls"));
235 /* Get the value of _DLD_HOOK (an export stub) and put it in __dld_hook;
236 This will force the dynamic linker to call __d_trap when significant
239 Note that the above is the pre-HP-UX 9.0 behaviour. At 9.0 and above,
240 the dld provides an export stub named "__d_trap" as well as the
241 function named "__d_trap" itself, but doesn't provide "_DLD_HOOK".
242 We'll look first for the old flavor and then the new. */
244 msymbol
= lookup_minimal_symbol ("_DLD_HOOK", NULL
, symfile_objfile
);
246 msymbol
= lookup_minimal_symbol ("__d_trap", NULL
, symfile_objfile
);
250 Unable to find _DLD_HOOK symbol in object file.\n\
251 Suggest linking with /opt/langtools/lib/end.o.\n\
252 GDB will be unable to track shl_load/shl_unload calls"));
255 anaddr
= SYMBOL_VALUE_ADDRESS (msymbol
);
256 dld_cache
.hook
.address
= anaddr
;
258 /* Grrr, this might not be an export symbol! We have to find the
260 msymbol
= hppa_lookup_stub_minimal_symbol (SYMBOL_LINKAGE_NAME (msymbol
),
264 anaddr
= SYMBOL_VALUE (msymbol
);
265 dld_cache
.hook_stub
.address
= anaddr
;
267 store_unsigned_integer (buf
, 4, byte_order
, anaddr
);
269 msymbol
= lookup_minimal_symbol ("__dld_hook", NULL
, symfile_objfile
);
273 Unable to find __dld_hook symbol in object file.\n\
274 Suggest linking with /opt/langtools/lib/end.o.\n\
275 GDB will be unable to track shl_load/shl_unload calls"));
278 anaddr
= SYMBOL_VALUE_ADDRESS (msymbol
);
279 status
= target_write_memory (anaddr
, buf
, 4);
281 /* Now set a shlib_event breakpoint at __d_trap so we can track
282 significant shared library events. */
283 msymbol
= lookup_minimal_symbol ("__d_trap", NULL
, symfile_objfile
);
287 Unable to find __dld_d_trap symbol in object file.\n\
288 Suggest linking with /opt/langtools/lib/end.o.\n\
289 GDB will be unable to track shl_load/shl_unload calls"));
292 create_solib_event_breakpoint (target_gdbarch
,
293 SYMBOL_VALUE_ADDRESS (msymbol
));
295 /* We have all the support usually found in end.o, so we can track
296 shl_load and shl_unload calls. */
301 /* Get the address of __dld_flags, if no such symbol exists, then we can
302 not debug the shared code. */
303 msymbol
= lookup_minimal_symbol ("__dld_flags", NULL
, NULL
);
306 error (_("Unable to find __dld_flags symbol in object file."));
309 anaddr
= SYMBOL_VALUE_ADDRESS (msymbol
);
311 /* Read the current contents. */
312 status
= target_read_memory (anaddr
, buf
, 4);
314 error (_("Unable to read __dld_flags."));
315 dld_flags
= extract_unsigned_integer (buf
, 4, byte_order
);
317 /* If the libraries were not mapped private on HP-UX 11 and later, warn
318 the user. On HP-UX 10 and earlier, there is no easy way to specify
319 that shared libraries should be privately mapped. So, we just force
321 if (get_hpux_major_release () >= 11
322 && (dl_header
.flags
& SHLIB_TEXT_PRIVATE_ENABLE
) == 0
323 && (dld_flags
& DLD_FLAGS_MAPPRIVATE
) == 0)
326 Private mapping of shared library text was not specified\n\
327 by the executable; setting a breakpoint in a shared library which\n\
328 is not privately mapped will not work. See the HP-UX 11i v3 chatr\n\
329 manpage for methods to privately map shared library text."));
331 /* Turn on the flags we care about. */
332 if (get_hpux_major_release () < 11)
333 dld_flags
|= DLD_FLAGS_MAPPRIVATE
;
335 dld_flags
|= DLD_FLAGS_HOOKVALID
;
336 store_unsigned_integer (buf
, 4, byte_order
, dld_flags
);
337 status
= target_write_memory (anaddr
, buf
, 4);
339 error (_("Unable to write __dld_flags."));
341 /* Now find the address of _start and set a breakpoint there.
342 We still need this code for two reasons:
344 * Not all sites have /opt/langtools/lib/end.o, so it's not always
345 possible to track the dynamic linker's events.
347 * At this time no events are triggered for shared libraries
348 loaded at startup time (what a crock). */
350 msymbol
= lookup_minimal_symbol ("_start", NULL
, symfile_objfile
);
352 error (_("Unable to find _start symbol in object file."));
354 anaddr
= SYMBOL_VALUE_ADDRESS (msymbol
);
356 /* Make the breakpoint at "_start" a shared library event breakpoint. */
357 create_solib_event_breakpoint (target_gdbarch
, anaddr
);
359 clear_symtab_users (0);
363 som_special_symbol_handling (void)
368 som_solib_desire_dynamic_linker_symbols (void)
370 struct objfile
*objfile
;
371 struct unwind_table_entry
*u
;
372 struct minimal_symbol
*dld_msymbol
;
374 /* Do we already know the value of these symbols? If so, then
377 (If you add clauses to this test, be sure to likewise update the
378 test within the loop.) */
380 if (dld_cache
.is_valid
)
383 ALL_OBJFILES (objfile
)
385 dld_msymbol
= lookup_minimal_symbol ("shl_load", NULL
, objfile
);
386 if (dld_msymbol
!= NULL
)
388 dld_cache
.load
.address
= SYMBOL_VALUE (dld_msymbol
);
389 dld_cache
.load
.unwind
= find_unwind_entry (dld_cache
.load
.address
);
392 dld_msymbol
= lookup_minimal_symbol_solib_trampoline ("shl_load",
394 if (dld_msymbol
!= NULL
)
396 if (MSYMBOL_TYPE (dld_msymbol
) == mst_solib_trampoline
)
398 u
= find_unwind_entry (SYMBOL_VALUE (dld_msymbol
));
399 if ((u
!= NULL
) && (u
->stub_unwind
.stub_type
== EXPORT
))
401 dld_cache
.load_stub
.address
= SYMBOL_VALUE (dld_msymbol
);
402 dld_cache
.load_stub
.unwind
= u
;
407 dld_msymbol
= lookup_minimal_symbol ("shl_unload", NULL
, objfile
);
408 if (dld_msymbol
!= NULL
)
410 dld_cache
.unload
.address
= SYMBOL_VALUE (dld_msymbol
);
411 dld_cache
.unload
.unwind
= find_unwind_entry (dld_cache
.unload
.address
);
413 /* ??rehrauer: I'm not sure exactly what this is, but it appears
414 that on some HPUX 10.x versions, there's two unwind regions to
415 cover the body of "shl_unload", the second being 4 bytes past
416 the end of the first. This is a large hack to handle that
417 case, but since I don't seem to have any legitimate way to
418 look for this thing via the symbol table... */
420 if (dld_cache
.unload
.unwind
!= NULL
)
422 u
= find_unwind_entry (dld_cache
.unload
.unwind
->region_end
+ 4);
425 dld_cache
.unload2
.address
= u
->region_start
;
426 dld_cache
.unload2
.unwind
= u
;
431 dld_msymbol
= lookup_minimal_symbol_solib_trampoline ("shl_unload",
433 if (dld_msymbol
!= NULL
)
435 if (MSYMBOL_TYPE (dld_msymbol
) == mst_solib_trampoline
)
437 u
= find_unwind_entry (SYMBOL_VALUE (dld_msymbol
));
438 if ((u
!= NULL
) && (u
->stub_unwind
.stub_type
== EXPORT
))
440 dld_cache
.unload_stub
.address
= SYMBOL_VALUE (dld_msymbol
);
441 dld_cache
.unload_stub
.unwind
= u
;
446 /* Did we find everything we were looking for? If so, stop. */
447 if ((dld_cache
.load
.address
!= 0)
448 && (dld_cache
.load_stub
.address
!= 0)
449 && (dld_cache
.unload
.address
!= 0)
450 && (dld_cache
.unload_stub
.address
!= 0))
452 dld_cache
.is_valid
= 1;
457 dld_cache
.hook
.unwind
= find_unwind_entry (dld_cache
.hook
.address
);
458 dld_cache
.hook_stub
.unwind
= find_unwind_entry (dld_cache
.hook_stub
.address
);
460 /* We're prepared not to find some of these symbols, which is why
461 this function is a "desire" operation, and not a "require". */
465 som_in_dynsym_resolve_code (CORE_ADDR pc
)
467 struct unwind_table_entry
*u_pc
;
469 /* Are we in the dld itself?
471 ??rehrauer: Large hack -- We'll assume that any address in a
472 shared text region is the dld's text. This would obviously
473 fall down if the user attached to a process, whose shlibs
474 weren't mapped to a (writeable) private region. However, in
475 that case the debugger probably isn't able to set the fundamental
476 breakpoint in the dld callback anyways, so this hack should be
479 if ((pc
& (CORE_ADDR
) 0xc0000000) == (CORE_ADDR
) 0xc0000000)
482 /* Cache the address of some symbols that are part of the dynamic
483 linker, if not already known. */
485 som_solib_desire_dynamic_linker_symbols ();
487 /* Are we in the dld callback? Or its export stub? */
488 u_pc
= find_unwind_entry (pc
);
492 if ((u_pc
== dld_cache
.hook
.unwind
) || (u_pc
== dld_cache
.hook_stub
.unwind
))
495 /* Or the interface of the dld (i.e., "shl_load" or friends)? */
496 if ((u_pc
== dld_cache
.load
.unwind
)
497 || (u_pc
== dld_cache
.unload
.unwind
)
498 || (u_pc
== dld_cache
.unload2
.unwind
)
499 || (u_pc
== dld_cache
.load_stub
.unwind
)
500 || (u_pc
== dld_cache
.unload_stub
.unwind
))
503 /* Apparently this address isn't part of the dld's text. */
508 som_clear_solib (void)
516 char text_link_addr
[4];
523 char tsd_start_addr_ptr
[4];
527 link_map_start (void)
529 enum bfd_endian byte_order
= gdbarch_byte_order (target_gdbarch
);
530 struct minimal_symbol
*sym
;
533 unsigned int dld_flags
;
535 sym
= lookup_minimal_symbol ("__dld_flags", NULL
, NULL
);
537 error (_("Unable to find __dld_flags symbol in object file."));
538 addr
= SYMBOL_VALUE_ADDRESS (sym
);
539 read_memory (addr
, buf
, 4);
540 dld_flags
= extract_unsigned_integer (buf
, 4, byte_order
);
541 if ((dld_flags
& DLD_FLAGS_LISTVALID
) == 0)
542 error (_("__dld_list is not valid according to __dld_flags."));
544 sym
= lookup_minimal_symbol ("__dld_list", NULL
, NULL
);
547 /* Older crt0.o files (hpux8) don't have __dld_list as a symbol,
548 but the data is still available if you know where to look. */
549 sym
= lookup_minimal_symbol ("__dld_flags", NULL
, NULL
);
552 error (_("Unable to find dynamic library list."));
555 addr
= SYMBOL_VALUE_ADDRESS (sym
) - 8;
558 addr
= SYMBOL_VALUE_ADDRESS (sym
);
560 read_memory (addr
, buf
, 4);
561 addr
= extract_unsigned_integer (buf
, 4, byte_order
);
565 read_memory (addr
, buf
, 4);
566 return extract_unsigned_integer (buf
, 4, byte_order
);
569 /* Does this so's name match the main binary? */
571 match_main (const char *name
)
573 return strcmp (name
, symfile_objfile
->name
) == 0;
576 static struct so_list
*
577 som_current_sos (void)
579 enum bfd_endian byte_order
= gdbarch_byte_order (target_gdbarch
);
581 struct so_list
*head
= 0;
582 struct so_list
**link_ptr
= &head
;
584 for (lm
= link_map_start (); lm
; )
589 struct cleanup
*old_chain
;
591 struct dld_list dbuf
;
594 new = (struct so_list
*) xmalloc (sizeof (struct so_list
));
595 old_chain
= make_cleanup (xfree
, new);
597 memset (new, 0, sizeof (*new));
598 new->lm_info
= xmalloc (sizeof (struct lm_info
));
599 make_cleanup (xfree
, new->lm_info
);
601 read_memory (lm
, (gdb_byte
*)&dbuf
, sizeof (struct dld_list
));
603 addr
= extract_unsigned_integer ((gdb_byte
*)&dbuf
.name
,
604 sizeof (dbuf
.name
), byte_order
);
605 target_read_string (addr
, &namebuf
, SO_NAME_MAX_PATH_SIZE
- 1, &errcode
);
607 warning (_("Can't read pathname for load map: %s."),
608 safe_strerror (errcode
));
611 strncpy (new->so_name
, namebuf
, SO_NAME_MAX_PATH_SIZE
- 1);
612 new->so_name
[SO_NAME_MAX_PATH_SIZE
- 1] = '\0';
614 strcpy (new->so_original_name
, new->so_name
);
617 if (new->so_name
[0] && !match_main (new->so_name
))
619 struct lm_info
*lmi
= new->lm_info
;
624 #define EXTRACT(_fld) \
625 extract_unsigned_integer ((gdb_byte *)&dbuf._fld, \
626 sizeof (dbuf._fld), byte_order);
628 lmi
->text_addr
= EXTRACT (text_addr
);
629 tmp
= EXTRACT (info
);
630 lmi
->library_version
= (tmp
>> 16) & 0xffff;
631 lmi
->bind_mode
= (tmp
>> 8) & 0xff;
632 lmi
->struct_version
= tmp
& 0xff;
633 lmi
->text_link_addr
= EXTRACT (text_link_addr
);
634 lmi
->text_end
= EXTRACT (text_end
);
635 lmi
->data_start
= EXTRACT (data_start
);
636 lmi
->bss_start
= EXTRACT (bss_start
);
637 lmi
->data_end
= EXTRACT (data_end
);
638 lmi
->got_value
= EXTRACT (got_value
);
639 tmp
= EXTRACT (tsd_start_addr_ptr
);
640 read_memory (tmp
, tsdbuf
, 4);
642 = extract_unsigned_integer (tsdbuf
, 4, byte_order
);
645 printf ("\n+ library \"%s\" is described at %s\n", new->so_name
,
646 paddress (target_gdbarch
, lm
));
647 printf (" 'version' is %d\n", new->lm_info
->struct_version
);
648 printf (" 'bind_mode' is %d\n", new->lm_info
->bind_mode
);
649 printf (" 'library_version' is %d\n",
650 new->lm_info
->library_version
);
651 printf (" 'text_addr' is %s\n",
652 paddress (target_gdbarch
, new->lm_info
->text_addr
));
653 printf (" 'text_link_addr' is %s\n",
654 paddress (target_gdbarch
, new->lm_info
->text_link_addr
));
655 printf (" 'text_end' is %s\n",
656 paddress (target_gdbarch
, new->lm_info
->text_end
));
657 printf (" 'data_start' is %s\n",
658 paddress (target_gdbarch
, new->lm_info
->data_start
));
659 printf (" 'bss_start' is %s\n",
660 paddress (target_gdbarch
, new->lm_info
->bss_start
));
661 printf (" 'data_end' is %s\n",
662 paddress (target_gdbarch
, new->lm_info
->data_end
));
663 printf (" 'got_value' is %s\n",
664 paddress (target_gdbarch
, new->lm_info
->got_value
));
665 printf (" 'tsd_start_addr' is %s\n",
666 paddress (target_gdbarch
, new->lm_info
->tsd_start_addr
));
669 new->addr_low
= lmi
->text_addr
;
670 new->addr_high
= lmi
->text_end
;
672 /* Link the new object onto the list. */
675 link_ptr
= &new->next
;
683 discard_cleanups (old_chain
);
687 /* TODO: The original somsolib code has logic to detect and eliminate
688 duplicate entries. Do we need that? */
694 som_open_symbol_file_object (void *from_ttyp
)
696 enum bfd_endian byte_order
= gdbarch_byte_order (target_gdbarch
);
697 CORE_ADDR lm
, l_name
;
700 int from_tty
= *(int *)from_ttyp
;
704 if (!query (_("Attempt to reload symbols from process? ")))
707 /* First link map member should be the executable. */
708 if ((lm
= link_map_start ()) == 0)
709 return 0; /* failed somehow... */
711 /* Read address of name from target memory to GDB. */
712 read_memory (lm
+ offsetof (struct dld_list
, name
), buf
, 4);
714 /* Convert the address to host format. Assume that the address is
716 l_name
= extract_unsigned_integer (buf
, 4, byte_order
);
719 return 0; /* No filename. */
721 /* Now fetch the filename from target memory. */
722 target_read_string (l_name
, &filename
, SO_NAME_MAX_PATH_SIZE
- 1, &errcode
);
726 warning (_("failed to read exec filename from attached file: %s"),
727 safe_strerror (errcode
));
731 make_cleanup (xfree
, filename
);
732 /* Have a pathname: read the symbol file. */
733 symbol_file_add_main (filename
, from_tty
);
739 som_free_so (struct so_list
*so
)
745 som_solib_thread_start_addr (struct so_list
*so
)
747 return so
->lm_info
->tsd_start_addr
;
750 /* Return the GOT value for the shared library in which ADDR belongs. If
751 ADDR isn't in any known shared library, return zero. */
754 som_solib_get_got_by_pc (CORE_ADDR addr
)
756 struct so_list
*so_list
= master_so_list ();
757 CORE_ADDR got_value
= 0;
761 if (so_list
->lm_info
->text_addr
<= addr
762 && so_list
->lm_info
->text_end
> addr
)
764 got_value
= so_list
->lm_info
->got_value
;
767 so_list
= so_list
->next
;
772 /* Return the address of the handle of the shared library in which
773 ADDR belongs. If ADDR isn't in any known shared library, return
775 /* This function is used in initialize_hp_cxx_exception_support in
779 som_solib_get_solib_by_pc (CORE_ADDR addr
)
781 struct so_list
*so_list
= master_so_list ();
785 if (so_list
->lm_info
->text_addr
<= addr
786 && so_list
->lm_info
->text_end
> addr
)
790 so_list
= so_list
->next
;
793 return so_list
->lm_info
->lm_addr
;
799 static struct target_so_ops som_so_ops
;
801 extern initialize_file_ftype _initialize_som_solib
; /* -Wmissing-prototypes */
804 _initialize_som_solib (void)
806 som_so_ops
.relocate_section_addresses
= som_relocate_section_addresses
;
807 som_so_ops
.free_so
= som_free_so
;
808 som_so_ops
.clear_solib
= som_clear_solib
;
809 som_so_ops
.solib_create_inferior_hook
= som_solib_create_inferior_hook
;
810 som_so_ops
.special_symbol_handling
= som_special_symbol_handling
;
811 som_so_ops
.current_sos
= som_current_sos
;
812 som_so_ops
.open_symbol_file_object
= som_open_symbol_file_object
;
813 som_so_ops
.in_dynsym_resolve_code
= som_in_dynsym_resolve_code
;
814 som_so_ops
.bfd_open
= solib_bfd_open
;
818 som_solib_select (struct gdbarch
*gdbarch
)
820 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
822 set_solib_ops (gdbarch
, &som_so_ops
);
823 tdep
->solib_thread_start_addr
= som_solib_thread_start_addr
;
824 tdep
->solib_get_got_by_pc
= som_solib_get_got_by_pc
;
825 tdep
->solib_get_solib_by_pc
= som_solib_get_solib_by_pc
;
828 /* The rest of these functions are not part of the solib interface; they
829 are used by somread.c or hppa-hpux-tdep.c. */
832 som_solib_section_offsets (struct objfile
*objfile
,
833 struct section_offsets
*offsets
)
835 struct so_list
*so_list
= master_so_list ();
839 /* Oh what a pain! We need the offsets before so_list->objfile
840 is valid. The BFDs will never match. Make a best guess. */
841 if (strstr (objfile
->name
, so_list
->so_name
))
843 asection
*private_section
;
845 /* The text offset is easy. */
846 offsets
->offsets
[SECT_OFF_TEXT (objfile
)]
847 = (so_list
->lm_info
->text_addr
848 - so_list
->lm_info
->text_link_addr
);
849 offsets
->offsets
[SECT_OFF_RODATA (objfile
)]
850 = ANOFFSET (offsets
, SECT_OFF_TEXT (objfile
));
852 /* We should look at presumed_dp in the SOM header, but
853 that's not easily available. This should be OK though. */
854 private_section
= bfd_get_section_by_name (objfile
->obfd
,
856 if (!private_section
)
858 warning (_("Unable to find $PRIVATE$ in shared library!"));
859 offsets
->offsets
[SECT_OFF_DATA (objfile
)] = 0;
860 offsets
->offsets
[SECT_OFF_BSS (objfile
)] = 0;
863 offsets
->offsets
[SECT_OFF_DATA (objfile
)]
864 = (so_list
->lm_info
->data_start
- private_section
->vma
);
865 offsets
->offsets
[SECT_OFF_BSS (objfile
)]
866 = ANOFFSET (offsets
, SECT_OFF_DATA (objfile
));
869 so_list
= so_list
->next
;