1 /* Handle SOM shared libraries.
3 Copyright (C) 2004, 2005, 2007, 2008, 2009 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
29 #include "hppa-tdep.h"
32 #include "solib-som.h"
34 #include <sys/utsname.h>
39 /* These ought to be defined in some public interface, but aren't. They
40 define the meaning of the various bits in the distinguished __dld_flags
41 variable that is declared in every debuggable a.out on HP-UX, and that
42 is shared between the debugger and the dynamic linker.
44 #define DLD_FLAGS_MAPPRIVATE 0x1
45 #define DLD_FLAGS_HOOKVALID 0x2
46 #define DLD_FLAGS_LISTVALID 0x4
47 #define DLD_FLAGS_BOR_ENABLE 0x8
51 /* Version of this structure (it is expected to change again in hpux10). */
52 unsigned char struct_version
;
54 /* Binding mode for this library. */
55 unsigned char bind_mode
;
57 /* Version of this library. */
58 short library_version
;
60 /* Start of text address,
61 link-time text location (length of text area),
62 end of text address. */
64 CORE_ADDR text_link_addr
;
67 /* Start of data, start of bss and end of data. */
72 /* Value of linkage pointer (%r19). */
75 /* Address in target of offset from thread-local register of
76 start of this thread's data. I.e., the first thread-local
77 variable in this shared library starts at *(tsd_start_addr)
78 from that area pointed to by cr27 (mpsfu_hi).
80 We do the indirection as soon as we read it, so from then
81 on it's the offset itself. */
82 CORE_ADDR tsd_start_addr
;
84 /* Address of the link map entry in the loader. */
88 /* These addresses should be filled in by som_solib_create_inferior_hook.
89 They are also used elsewhere in this module.
94 struct unwind_table_entry
*unwind
;
98 /* When adding fields, be sure to clear them in _initialize_som_solib. */
102 addr_and_unwind_t hook
;
103 addr_and_unwind_t hook_stub
;
104 addr_and_unwind_t load
;
105 addr_and_unwind_t load_stub
;
106 addr_and_unwind_t unload
;
107 addr_and_unwind_t unload2
;
108 addr_and_unwind_t unload_stub
;
113 som_relocate_section_addresses (struct so_list
*so
,
114 struct target_section
*sec
)
116 flagword aflag
= bfd_get_section_flags(so
->abfd
, sec
->the_bfd_section
);
118 if (aflag
& SEC_CODE
)
120 sec
->addr
+= so
->lm_info
->text_addr
- so
->lm_info
->text_link_addr
;
121 sec
->endaddr
+= so
->lm_info
->text_addr
- so
->lm_info
->text_link_addr
;
123 else if (aflag
& SEC_DATA
)
125 sec
->addr
+= so
->lm_info
->data_start
;
126 sec
->endaddr
+= so
->lm_info
->data_start
;
132 /* Get HP-UX major release number. Returns zero if the
133 release is not known. */
136 get_hpux_major_release (void)
138 static int hpux_major_release
= -1;
140 if (hpux_major_release
== -1)
146 p
= strchr (x
.release
, '.');
147 hpux_major_release
= p
? atoi (p
+ 1) : 0;
150 return hpux_major_release
;
153 /* DL header flag defines. */
154 #define SHLIB_TEXT_PRIVATE_ENABLE 0x4000
156 /* The DL header is documented in <shl.h>. We are only interested
157 in the flags field to determine whether the executable wants shared
158 libraries mapped private. */
164 /* This hook gets called just before the first instruction in the
165 inferior process is executed.
167 This is our opportunity to set magic flags in the inferior so
168 that GDB can be notified when a shared library is mapped in and
169 to tell the dynamic linker that a private copy of the library is
170 needed (so GDB can set breakpoints in the library).
172 __dld_flags is the location of the magic flags; as of this implementation
173 there are 3 flags of interest:
175 bit 0 when set indicates that private copies of the libraries are needed
176 bit 1 when set indicates that the callback hook routine is valid
177 bit 2 when set indicates that the dynamic linker should maintain the
178 __dld_list structure when loading/unloading libraries.
180 Note that shared libraries are not mapped in at this time, so we have
181 run the inferior until the libraries are mapped in. Typically this
182 means running until the "_start" is called. */
185 som_solib_create_inferior_hook (void)
187 struct minimal_symbol
*msymbol
;
188 unsigned int dld_flags
, status
, have_endo
;
189 asection
*shlib_info
;
193 /* First, remove all the solib event breakpoints. Their addresses
194 may have changed since the last time we ran the program. */
195 remove_solib_event_breakpoints ();
197 if (symfile_objfile
== NULL
)
200 /* First see if the objfile was dynamically linked. */
201 shlib_info
= bfd_get_section_by_name (symfile_objfile
->obfd
, "$SHLIB_INFO$");
205 /* It's got a $SHLIB_INFO$ section, make sure it's not empty. */
206 if (bfd_section_size (symfile_objfile
->obfd
, shlib_info
) == 0)
209 /* Read the DL header. */
210 bfd_get_section_contents (symfile_objfile
->obfd
, shlib_info
,
211 (char *) &dl_header
, 0, sizeof (dl_header
));
214 /* Slam the pid of the process into __d_pid.
216 We used to warn when this failed, but that warning is only useful
217 on very old HP systems (hpux9 and older). The warnings are an
218 annoyance to users of modern systems and foul up the testsuite as
219 well. As a result, the warnings have been disabled. */
220 msymbol
= lookup_minimal_symbol ("__d_pid", NULL
, symfile_objfile
);
224 anaddr
= SYMBOL_VALUE_ADDRESS (msymbol
);
225 store_unsigned_integer (buf
, 4, PIDGET (inferior_ptid
));
226 status
= target_write_memory (anaddr
, buf
, 4);
230 Unable to write __d_pid.\n\
231 Suggest linking with /opt/langtools/lib/end.o.\n\
232 GDB will be unable to track shl_load/shl_unload calls"));
236 /* Get the value of _DLD_HOOK (an export stub) and put it in __dld_hook;
237 This will force the dynamic linker to call __d_trap when significant
240 Note that the above is the pre-HP-UX 9.0 behaviour. At 9.0 and above,
241 the dld provides an export stub named "__d_trap" as well as the
242 function named "__d_trap" itself, but doesn't provide "_DLD_HOOK".
243 We'll look first for the old flavor and then the new.
245 msymbol
= lookup_minimal_symbol ("_DLD_HOOK", NULL
, symfile_objfile
);
247 msymbol
= lookup_minimal_symbol ("__d_trap", NULL
, symfile_objfile
);
251 Unable to find _DLD_HOOK symbol in object file.\n\
252 Suggest linking with /opt/langtools/lib/end.o.\n\
253 GDB will be unable to track shl_load/shl_unload calls"));
256 anaddr
= SYMBOL_VALUE_ADDRESS (msymbol
);
257 dld_cache
.hook
.address
= anaddr
;
259 /* Grrr, this might not be an export symbol! We have to find the
261 msymbol
= hppa_lookup_stub_minimal_symbol (SYMBOL_LINKAGE_NAME (msymbol
),
265 anaddr
= SYMBOL_VALUE (msymbol
);
266 dld_cache
.hook_stub
.address
= anaddr
;
268 store_unsigned_integer (buf
, 4, anaddr
);
270 msymbol
= lookup_minimal_symbol ("__dld_hook", NULL
, symfile_objfile
);
274 Unable to find __dld_hook symbol in object file.\n\
275 Suggest linking with /opt/langtools/lib/end.o.\n\
276 GDB will be unable to track shl_load/shl_unload calls"));
279 anaddr
= SYMBOL_VALUE_ADDRESS (msymbol
);
280 status
= target_write_memory (anaddr
, buf
, 4);
282 /* Now set a shlib_event breakpoint at __d_trap so we can track
283 significant shared library events. */
284 msymbol
= lookup_minimal_symbol ("__d_trap", NULL
, symfile_objfile
);
288 Unable to find __dld_d_trap symbol in object file.\n\
289 Suggest linking with /opt/langtools/lib/end.o.\n\
290 GDB will be unable to track shl_load/shl_unload calls"));
293 create_solib_event_breakpoint (target_gdbarch
,
294 SYMBOL_VALUE_ADDRESS (msymbol
));
296 /* We have all the support usually found in end.o, so we can track
297 shl_load and shl_unload calls. */
302 /* Get the address of __dld_flags, if no such symbol exists, then we can
303 not debug the shared code. */
304 msymbol
= lookup_minimal_symbol ("__dld_flags", NULL
, NULL
);
307 error (_("Unable to find __dld_flags symbol in object file."));
310 anaddr
= SYMBOL_VALUE_ADDRESS (msymbol
);
312 /* Read the current contents. */
313 status
= target_read_memory (anaddr
, buf
, 4);
315 error (_("Unable to read __dld_flags."));
316 dld_flags
= extract_unsigned_integer (buf
, 4);
318 /* If the libraries were not mapped private on HP-UX 11 and later, warn
319 the user. On HP-UX 10 and earlier, there is no easy way to specify
320 that shared libraries should be privately mapped. So, we just force
322 if (get_hpux_major_release () >= 11
323 && (dl_header
.flags
& SHLIB_TEXT_PRIVATE_ENABLE
) == 0
324 && (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, 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 ();
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".
466 som_in_dynsym_resolve_code (CORE_ADDR pc
)
468 struct unwind_table_entry
*u_pc
;
470 /* Are we in the dld itself?
472 ??rehrauer: Large hack -- We'll assume that any address in a
473 shared text region is the dld's text. This would obviously
474 fall down if the user attached to a process, whose shlibs
475 weren't mapped to a (writeable) private region. However, in
476 that case the debugger probably isn't able to set the fundamental
477 breakpoint in the dld callback anyways, so this hack should be
480 if ((pc
& (CORE_ADDR
) 0xc0000000) == (CORE_ADDR
) 0xc0000000)
483 /* Cache the address of some symbols that are part of the dynamic
484 linker, if not already known.
486 som_solib_desire_dynamic_linker_symbols ();
488 /* Are we in the dld callback? Or its export stub? */
489 u_pc
= find_unwind_entry (pc
);
493 if ((u_pc
== dld_cache
.hook
.unwind
) || (u_pc
== dld_cache
.hook_stub
.unwind
))
496 /* Or the interface of the dld (i.e., "shl_load" or friends)? */
497 if ((u_pc
== dld_cache
.load
.unwind
)
498 || (u_pc
== dld_cache
.unload
.unwind
)
499 || (u_pc
== dld_cache
.unload2
.unwind
)
500 || (u_pc
== dld_cache
.load_stub
.unwind
)
501 || (u_pc
== dld_cache
.unload_stub
.unwind
))
504 /* Apparently this address isn't part of the dld's text. */
509 som_clear_solib (void)
517 char text_link_addr
[4];
524 char tsd_start_addr_ptr
[4];
528 link_map_start (void)
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);
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);
565 read_memory (addr
, buf
, 4);
566 return extract_unsigned_integer (buf
, 4);
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)
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
,
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, sizeof (dbuf._fld));
626 lmi
->text_addr
= EXTRACT (text_addr
);
627 tmp
= EXTRACT (info
);
628 lmi
->library_version
= (tmp
>> 16) & 0xffff;
629 lmi
->bind_mode
= (tmp
>> 8) & 0xff;
630 lmi
->struct_version
= tmp
& 0xff;
631 lmi
->text_link_addr
= EXTRACT (text_link_addr
);
632 lmi
->text_end
= EXTRACT (text_end
);
633 lmi
->data_start
= EXTRACT (data_start
);
634 lmi
->bss_start
= EXTRACT (bss_start
);
635 lmi
->data_end
= EXTRACT (data_end
);
636 lmi
->got_value
= EXTRACT (got_value
);
637 tmp
= EXTRACT (tsd_start_addr_ptr
);
638 read_memory (tmp
, tsdbuf
, 4);
639 lmi
->tsd_start_addr
= extract_unsigned_integer (tsdbuf
, 4);
642 printf ("\n+ library \"%s\" is described at %s\n", new->so_name
,
643 paddress (target_gdbarch
, lm
));
644 printf (" 'version' is %d\n", new->lm_info
->struct_version
);
645 printf (" 'bind_mode' is %d\n", new->lm_info
->bind_mode
);
646 printf (" 'library_version' is %d\n",
647 new->lm_info
->library_version
);
648 printf (" 'text_addr' is %s\n",
649 paddress (target_gdbarch
, new->lm_info
->text_addr
));
650 printf (" 'text_link_addr' is %s\n",
651 paddress (target_gdbarch
, new->lm_info
->text_link_addr
));
652 printf (" 'text_end' is %s\n",
653 paddress (target_gdbarch
, new->lm_info
->text_end
));
654 printf (" 'data_start' is %s\n",
655 paddress (target_gdbarch
, new->lm_info
->data_start
));
656 printf (" 'bss_start' is %s\n",
657 paddress (target_gdbarch
, new->lm_info
->bss_start
));
658 printf (" 'data_end' is %s\n",
659 paddress (target_gdbarch
, new->lm_info
->data_end
));
660 printf (" 'got_value' is %s\n",
661 paddress (target_gdbarch
, new->lm_info
->got_value
));
662 printf (" 'tsd_start_addr' is %s\n",
663 paddress (target_gdbarch
, new->lm_info
->tsd_start_addr
));
666 new->addr_low
= lmi
->text_addr
;
667 new->addr_high
= lmi
->text_end
;
669 /* Link the new object onto the list. */
672 link_ptr
= &new->next
;
680 discard_cleanups (old_chain
);
684 /* TODO: The original somsolib code has logic to detect and eliminate
685 duplicate entries. Do we need that? */
691 som_open_symbol_file_object (void *from_ttyp
)
693 CORE_ADDR lm
, l_name
;
696 int from_tty
= *(int *)from_ttyp
;
700 if (!query (_("Attempt to reload symbols from process? ")))
703 /* First link map member should be the executable. */
704 if ((lm
= link_map_start ()) == 0)
705 return 0; /* failed somehow... */
707 /* Read address of name from target memory to GDB. */
708 read_memory (lm
+ offsetof (struct dld_list
, name
), buf
, 4);
710 /* Convert the address to host format. Assume that the address is
712 l_name
= extract_unsigned_integer (buf
, 4);
715 return 0; /* No filename. */
717 /* Now fetch the filename from target memory. */
718 target_read_string (l_name
, &filename
, SO_NAME_MAX_PATH_SIZE
- 1, &errcode
);
722 warning (_("failed to read exec filename from attached file: %s"),
723 safe_strerror (errcode
));
727 make_cleanup (xfree
, filename
);
728 /* Have a pathname: read the symbol file. */
729 symbol_file_add_main (filename
, from_tty
);
735 som_free_so (struct so_list
*so
)
741 som_solib_thread_start_addr (struct so_list
*so
)
743 return so
->lm_info
->tsd_start_addr
;
746 /* Return the GOT value for the shared library in which ADDR belongs. If
747 ADDR isn't in any known shared library, return zero. */
750 som_solib_get_got_by_pc (CORE_ADDR addr
)
752 struct so_list
*so_list
= master_so_list ();
753 CORE_ADDR got_value
= 0;
757 if (so_list
->lm_info
->text_addr
<= addr
758 && so_list
->lm_info
->text_end
> addr
)
760 got_value
= so_list
->lm_info
->got_value
;
763 so_list
= so_list
->next
;
768 /* Return the address of the handle of the shared library in which ADDR belongs.
769 If ADDR isn't in any known shared library, return zero. */
770 /* this function is used in initialize_hp_cxx_exception_support in
774 som_solib_get_solib_by_pc (CORE_ADDR addr
)
776 struct so_list
*so_list
= master_so_list ();
780 if (so_list
->lm_info
->text_addr
<= addr
781 && so_list
->lm_info
->text_end
> addr
)
785 so_list
= so_list
->next
;
788 return so_list
->lm_info
->lm_addr
;
794 static struct target_so_ops som_so_ops
;
796 extern initialize_file_ftype _initialize_som_solib
; /* -Wmissing-prototypes */
799 _initialize_som_solib (void)
801 som_so_ops
.relocate_section_addresses
= som_relocate_section_addresses
;
802 som_so_ops
.free_so
= som_free_so
;
803 som_so_ops
.clear_solib
= som_clear_solib
;
804 som_so_ops
.solib_create_inferior_hook
= som_solib_create_inferior_hook
;
805 som_so_ops
.special_symbol_handling
= som_special_symbol_handling
;
806 som_so_ops
.current_sos
= som_current_sos
;
807 som_so_ops
.open_symbol_file_object
= som_open_symbol_file_object
;
808 som_so_ops
.in_dynsym_resolve_code
= som_in_dynsym_resolve_code
;
812 som_solib_select (struct gdbarch
*gdbarch
)
814 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
815 set_solib_ops (gdbarch
, &som_so_ops
);
817 tdep
->solib_thread_start_addr
= som_solib_thread_start_addr
;
818 tdep
->solib_get_got_by_pc
= som_solib_get_got_by_pc
;
819 tdep
->solib_get_solib_by_pc
= som_solib_get_solib_by_pc
;
822 /* The rest of these functions are not part of the solib interface; they
823 are used by somread.c or hppa-hpux-tdep.c */
826 som_solib_section_offsets (struct objfile
*objfile
,
827 struct section_offsets
*offsets
)
829 struct so_list
*so_list
= master_so_list ();
833 /* Oh what a pain! We need the offsets before so_list->objfile
834 is valid. The BFDs will never match. Make a best guess. */
835 if (strstr (objfile
->name
, so_list
->so_name
))
837 asection
*private_section
;
839 /* The text offset is easy. */
840 offsets
->offsets
[SECT_OFF_TEXT (objfile
)]
841 = (so_list
->lm_info
->text_addr
842 - so_list
->lm_info
->text_link_addr
);
843 offsets
->offsets
[SECT_OFF_RODATA (objfile
)]
844 = ANOFFSET (offsets
, SECT_OFF_TEXT (objfile
));
846 /* We should look at presumed_dp in the SOM header, but
847 that's not easily available. This should be OK though. */
848 private_section
= bfd_get_section_by_name (objfile
->obfd
,
850 if (!private_section
)
852 warning (_("Unable to find $PRIVATE$ in shared library!"));
853 offsets
->offsets
[SECT_OFF_DATA (objfile
)] = 0;
854 offsets
->offsets
[SECT_OFF_BSS (objfile
)] = 0;
857 offsets
->offsets
[SECT_OFF_DATA (objfile
)]
858 = (so_list
->lm_info
->data_start
- private_section
->vma
);
859 offsets
->offsets
[SECT_OFF_BSS (objfile
)]
860 = ANOFFSET (offsets
, SECT_OFF_DATA (objfile
));
863 so_list
= so_list
->next
;