Remove solib-sunos.c

gdb/
2013-09-24  Jan Kratochvil  <jan.kratochvil@redhat.com>

	Remove solib-sunos.c.
	* Makefile.in (ALLDEPFILES): Remove solib-sunos.c.
	* config/m68k/obsd.mh (NATDEPFILES): Remove solib-sunos.o.
	* objfiles.c (rt_common_objfile): Remove.
	(free_objfile): Remove rt_common_objfile comparison.
	* objfiles.h (rt_common_objfile): Remove.
	* solib-sunos.c: Remove.
	* symfile.c (reread_symbols): Remove solib-sunos.c comment.

7 files changed, 13 insertions, 757 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 1bc12f9..3f3c720 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,16 @@
 2013-09-24  Jan Kratochvil  <jan.kratochvil@redhat.com>
 
+	Remove solib-sunos.c.
+	* Makefile.in (ALLDEPFILES): Remove solib-sunos.c.
+	* config/m68k/obsd.mh (NATDEPFILES): Remove solib-sunos.o.
+	* objfiles.c (rt_common_objfile): Remove.
+	(free_objfile): Remove rt_common_objfile comparison.
+	* objfiles.h (rt_common_objfile): Remove.
+	* solib-sunos.c: Remove.
+	* symfile.c (reread_symbols): Remove solib-sunos.c comment.
+
+2013-09-24  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
 	Remove a.out NetBSD and OpenBSD hosts.
 	* NEWS (Removed native configurations): New.
 	* config/arm/nbsdaout.mh: Remove.
diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index 93a3d6a..3b0b5c7 100644
--- a/gdb/Makefile.in
+++ b/gdb/Makefile.in
@@ -1546,7 +1546,7 @@ ALLDEPFILES = \
 	ser-go32.c ser-pipe.c ser-tcp.c ser-mingw.c \
 	sh-tdep.c sh64-tdep.c shnbsd-tdep.c shnbsd-nat.c \
 	sol2-tdep.c \
-	solib-irix.c solib-svr4.c solib-sunos.c \
+	solib-irix.c solib-svr4.c \
 	sparc-linux-nat.c sparc-linux-tdep.c \
 	sparc-sol2-nat.c sparc-sol2-tdep.c sparc64-sol2-tdep.c \
 	sparc-nat.c sparc-tdep.c sparc64-linux-nat.c sparc64-linux-tdep.c \
diff --git a/gdb/config/m68k/obsd.mh b/gdb/config/m68k/obsd.mh
index 16618c6..7930e3b 100644
--- a/gdb/config/m68k/obsd.mh
+++ b/gdb/config/m68k/obsd.mh
@@ -1,5 +1,4 @@
 # Host: OpenBSD/m68k
-NATDEPFILES= m68kbsd-nat.o bsd-kvm.o fork-child.o inf-ptrace.o \
-	solib-sunos.o
+NATDEPFILES= m68kbsd-nat.o bsd-kvm.o fork-child.o inf-ptrace.o
 
 LOADLIBES= -lkvm
diff --git a/gdb/objfiles.c b/gdb/objfiles.c
index 2b8cf4e..1681547 100644
--- a/gdb/objfiles.c
+++ b/gdb/objfiles.c
@@ -63,8 +63,6 @@ DEFINE_REGISTRY (objfile, REGISTRY_ACCESS_FIELD)
 /* Externally visible variables that are owned by this module.
    See declarations in objfile.h for more info.  */
 
-struct objfile *rt_common_objfile;	/* For runtime common symbols */
-
 struct objfile_pspace_info
 {
   struct obj_section **sections;
@@ -612,9 +610,6 @@ free_objfile (struct objfile *objfile)
   if (objfile == symfile_objfile)
     symfile_objfile = NULL;
 
-  if (objfile == rt_common_objfile)
-    rt_common_objfile = NULL;
-
   /* Before the symbol table code was redone to make it easier to
      selectively load and remove information particular to a specific
      linkage unit, gdb used to do these things whenever the monolithic
diff --git a/gdb/objfiles.h b/gdb/objfiles.h
index 5b762e4..51ec8a3 100644
--- a/gdb/objfiles.h
+++ b/gdb/objfiles.h
@@ -429,11 +429,6 @@ struct objfile
 
 #define OBJF_MAINLINE (1 << 5)
 
-/* The object file that contains the runtime common minimal symbols
-   for SunOS4.  Note that this objfile has no associated BFD.  */
-
-extern struct objfile *rt_common_objfile;
-
 /* Declarations for functions defined in objfiles.c */
 
 extern struct objfile *allocate_objfile (bfd *, int);
diff --git a/gdb/solib-sunos.c b/gdb/solib-sunos.c
deleted file mode 100644
index 3259f8b..0000000
--- a/gdb/solib-sunos.c
+++ /dev/null
@@ -1,743 +0,0 @@
-/* Handle SunOS shared libraries for GDB, the GNU Debugger.
-
-   Copyright (C) 1990-2013 Free Software Foundation, Inc.
-
-   This file is part of GDB.
-
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 3 of the License, or
-   (at your option) any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
-
-#include "defs.h"
-
-#include <sys/types.h>
-#include <signal.h>
-#include "gdb_string.h"
-#include <fcntl.h>
-
-/* SunOS shared libs need the nlist structure.  */
-#include <a.out.h>
-#include <link.h>
-
-#include "symtab.h"
-#include "bfd.h"
-#include "symfile.h"
-#include "objfiles.h"
-#include "gdbcore.h"
-#include "inferior.h"
-#include "gdbthread.h"
-#include "solist.h"
-#include "bcache.h"
-#include "regcache.h"
-
-/* The shared library implementation found on BSD a.out systems is
-   very similar to the SunOS implementation.  However, the data
-   structures defined in <link.h> are named very differently.  Make up
-   for those differences here.  */
-
-#ifdef HAVE_STRUCT_SO_MAP_WITH_SOM_MEMBERS
-
-/* FIXME: Temporary until the equivalent defines have been removed
-   from all nm-*bsd*.h files.  */
-#ifndef link_dynamic
-
-/* Map `struct link_map' and its members.  */
-#define link_map	so_map
-#define lm_addr		som_addr
-#define lm_name		som_path
-#define lm_next		som_next
-
-/* Map `struct link_dynamic_2' and its members.  */
-#define link_dynamic_2	section_dispatch_table
-#define ld_loaded	sdt_loaded
-
-/* Map `struct rtc_symb' and its members.  */
-#define rtc_symb	rt_symbol
-#define rtc_sp		rt_sp
-#define rtc_next	rt_next
-
-/* Map `struct ld_debug' and its members.  */
-#define ld_debug	so_debug
-#define ldd_in_debugger	dd_in_debugger
-#define ldd_bp_addr	dd_bpt_addr
-#define ldd_bp_inst	dd_bpt_shadow
-#define ldd_cp		dd_cc
-
-/* Map `struct link_dynamic' and its members.  */
-#define link_dynamic	_dynamic
-#define ld_version	d_version
-#define ldd		d_debug
-#define ld_un		d_un
-#define ld_2		d_sdt
-
-#endif
-
-#endif
-
-/* Link map info to include in an allocated so_list entry.  */
-
-struct lm_info
-  {
-    /* Pointer to copy of link map from inferior.  The type is char *
-       rather than void *, so that we may use byte offsets to find the
-       various fields without the need for a cast.  */
-    char *lm;
-  };
-
-
-/* Symbols which are used to locate the base of the link map structures.  */
-
-static char *debug_base_symbols[] =
-{
-  "_DYNAMIC",
-  "_DYNAMIC__MGC",
-  NULL
-};
-
-static char *main_name_list[] =
-{
-  "main_$main",
-  NULL
-};
-
-/* Macro to extract an address from a solib structure.  When GDB is
-   configured for some 32-bit targets (e.g. Solaris 2.7 sparc), BFD is
-   configured to handle 64-bit targets, so CORE_ADDR is 64 bits.  We
-   have to extract only the significant bits of addresses to get the
-   right address when accessing the core file BFD.
-
-   Assume that the address is unsigned.  */
-
-#define SOLIB_EXTRACT_ADDRESS(MEMBER) \
-	extract_unsigned_integer (&(MEMBER), sizeof (MEMBER), \
-				  gdbarch_byte_order (target_gdbarch ()))
-
-/* local data declarations */
-
-static struct link_dynamic dynamic_copy;
-static struct link_dynamic_2 ld_2_copy;
-static struct ld_debug debug_copy;
-static CORE_ADDR debug_addr;
-static CORE_ADDR flag_addr;
-
-#ifndef offsetof
-#define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
-#endif
-#define fieldsize(TYPE, MEMBER) (sizeof (((TYPE *)0)->MEMBER))
-
-/* link map access functions */
-
-static CORE_ADDR
-lm_addr (struct so_list *so)
-{
-  enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
-  int lm_addr_offset = offsetof (struct link_map, lm_addr);
-  int lm_addr_size = fieldsize (struct link_map, lm_addr);
-
-  return (CORE_ADDR) extract_signed_integer (so->lm_info->lm + lm_addr_offset, 
-					     lm_addr_size, byte_order);
-}
-
-static CORE_ADDR
-lm_next (struct so_list *so)
-{
-  enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
-  int lm_next_offset = offsetof (struct link_map, lm_next);
-  int lm_next_size = fieldsize (struct link_map, lm_next);
-
-  /* Assume that the address is unsigned.  */
-  return extract_unsigned_integer (so->lm_info->lm + lm_next_offset,
-				   lm_next_size, byte_order);
-}
-
-static CORE_ADDR
-lm_name (struct so_list *so)
-{
-  enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
-  int lm_name_offset = offsetof (struct link_map, lm_name);
-  int lm_name_size = fieldsize (struct link_map, lm_name);
-
-  /* Assume that the address is unsigned.  */
-  return extract_unsigned_integer (so->lm_info->lm + lm_name_offset,
-				   lm_name_size, byte_order);
-}
-
-static CORE_ADDR debug_base;	/* Base of dynamic linker structures.  */
-
-/* Local function prototypes */
-
-static int match_main (char *);
-
-/* Allocate the runtime common object file.  */
-
-static void
-allocate_rt_common_objfile (void)
-{
-  struct objfile *objfile;
-  struct objfile *last_one;
-
-  objfile = (struct objfile *) xmalloc (sizeof (struct objfile));
-  memset (objfile, 0, sizeof (struct objfile));
-  objfile->psymbol_cache = psymbol_bcache_init ();
-  objfile->macro_cache = bcache_xmalloc (NULL, NULL);
-  objfile->filename_cache = bcache_xmalloc (NULL, NULL);
-  obstack_init (&objfile->objfile_obstack);
-  objfile->name = xstrdup ("rt_common");
-
-  /* Add this file onto the tail of the linked list of other such files.  */
-
-  objfile->next = NULL;
-  if (object_files == NULL)
-    object_files = objfile;
-  else
-    {
-      for (last_one = object_files;
-	   last_one->next;
-	   last_one = last_one->next);
-      last_one->next = objfile;
-    }
-
-  rt_common_objfile = objfile;
-}
-
-/* Read all dynamically loaded common symbol definitions from the inferior
-   and put them into the minimal symbol table for the runtime common
-   objfile.  */
-
-static void
-solib_add_common_symbols (CORE_ADDR rtc_symp)
-{
-  struct rtc_symb inferior_rtc_symb;
-  struct nlist inferior_rtc_nlist;
-  int len;
-  char *name;
-
-  /* Remove any runtime common symbols from previous runs.  */
-
-  if (rt_common_objfile != NULL && rt_common_objfile->minimal_symbol_count)
-    {
-      obstack_free (&rt_common_objfile->objfile_obstack, 0);
-      obstack_init (&rt_common_objfile->objfile_obstack);
-      rt_common_objfile->minimal_symbol_count = 0;
-      rt_common_objfile->msymbols = NULL;
-      terminate_minimal_symbol_table (rt_common_objfile);
-    }
-
-  init_minimal_symbol_collection ();
-  make_cleanup_discard_minimal_symbols ();
-
-  while (rtc_symp)
-    {
-      read_memory (rtc_symp,
-		   (char *) &inferior_rtc_symb,
-		   sizeof (inferior_rtc_symb));
-      read_memory (SOLIB_EXTRACT_ADDRESS (inferior_rtc_symb.rtc_sp),
-		   (char *) &inferior_rtc_nlist,
-		   sizeof (inferior_rtc_nlist));
-      if (inferior_rtc_nlist.n_type == N_COMM)
-	{
-	  /* FIXME: The length of the symbol name is not available, but in the
-	     current implementation the common symbol is allocated immediately
-	     behind the name of the symbol.  */
-	  len = inferior_rtc_nlist.n_value - inferior_rtc_nlist.n_un.n_strx;
-
-	  name = xmalloc (len);
-	  read_memory (SOLIB_EXTRACT_ADDRESS (inferior_rtc_nlist.n_un.n_name),
-		       name, len);
-
-	  /* Allocate the runtime common objfile if necessary.  */
-	  if (rt_common_objfile == NULL)
-	    allocate_rt_common_objfile ();
-
-	  prim_record_minimal_symbol (name, inferior_rtc_nlist.n_value,
-				      mst_bss, rt_common_objfile);
-	  xfree (name);
-	}
-      rtc_symp = SOLIB_EXTRACT_ADDRESS (inferior_rtc_symb.rtc_next);
-    }
-
-  /* Install any minimal symbols that have been collected as the current
-     minimal symbols for the runtime common objfile.  */
-
-  install_minimal_symbols (rt_common_objfile);
-}
-
-
-/* Locate the base address of dynamic linker structs.
-
-   For both the SunOS and SVR4 shared library implementations, if the
-   inferior executable has been linked dynamically, there is a single
-   address somewhere in the inferior's data space which is the key to
-   locating all of the dynamic linker's runtime structures.  This
-   address is the value of the debug base symbol.  The job of this
-   function is to find and return that address, or to return 0 if there
-   is no such address (the executable is statically linked for example).
-
-   For SunOS, the job is almost trivial, since the dynamic linker and
-   all of it's structures are statically linked to the executable at
-   link time.  Thus the symbol for the address we are looking for has
-   already been added to the minimal symbol table for the executable's
-   objfile at the time the symbol file's symbols were read, and all we
-   have to do is look it up there.  Note that we explicitly do NOT want
-   to find the copies in the shared library.
-
-   The SVR4 version is a bit more complicated because the address
-   is contained somewhere in the dynamic info section.  We have to go
-   to a lot more work to discover the address of the debug base symbol.
-   Because of this complexity, we cache the value we find and return that
-   value on subsequent invocations.  Note there is no copy in the
-   executable symbol tables.  */
-
-static CORE_ADDR
-locate_base (void)
-{
-  struct minimal_symbol *msymbol;
-  CORE_ADDR address = 0;
-  char **symbolp;
-
-  /* For SunOS, we want to limit the search for the debug base symbol to the
-     executable being debugged, since there is a duplicate named symbol in the
-     shared library.  We don't want the shared library versions.  */
-
-  for (symbolp = debug_base_symbols; *symbolp != NULL; symbolp++)
-    {
-      msymbol = lookup_minimal_symbol (*symbolp, NULL, symfile_objfile);
-      if ((msymbol != NULL) && (SYMBOL_VALUE_ADDRESS (msymbol) != 0))
-	{
-	  address = SYMBOL_VALUE_ADDRESS (msymbol);
-	  return (address);
-	}
-    }
-  return (0);
-}
-
-/* Locate first member in dynamic linker's map.
-
-   Find the first element in the inferior's dynamic link map, and
-   return its address in the inferior.  This function doesn't copy the
-   link map entry itself into our address space; current_sos actually
-   does the reading.  */
-
-static CORE_ADDR
-first_link_map_member (void)
-{
-  CORE_ADDR lm = 0;
-
-  read_memory (debug_base, (char *) &dynamic_copy, sizeof (dynamic_copy));
-  if (dynamic_copy.ld_version >= 2)
-    {
-      /* It is a version that we can deal with, so read in the secondary
-         structure and find the address of the link map list from it.  */
-      read_memory (SOLIB_EXTRACT_ADDRESS (dynamic_copy.ld_un.ld_2),
-		   (char *) &ld_2_copy, sizeof (struct link_dynamic_2));
-      lm = SOLIB_EXTRACT_ADDRESS (ld_2_copy.ld_loaded);
-    }
-  return (lm);
-}
-
-static int
-open_symbol_file_object (void *from_ttyp)
-{
-  return 1;
-}
-
-
-/* Implement the "current_sos" target_so_ops method.  */
-
-static struct so_list *
-sunos_current_sos (void)
-{
-  CORE_ADDR lm;
-  struct so_list *head = 0;
-  struct so_list **link_ptr = &head;
-  int errcode;
-  char *buffer;
-
-  /* Make sure we've looked up the inferior's dynamic linker's base
-     structure.  */
-  if (! debug_base)
-    {
-      debug_base = locate_base ();
-
-      /* If we can't find the dynamic linker's base structure, this
-	 must not be a dynamically linked executable.  Hmm.  */
-      if (! debug_base)
-	return 0;
-    }
-
-  /* Walk the inferior's link map list, and build our list of
-     `struct so_list' nodes.  */
-  lm = first_link_map_member ();  
-  while (lm)
-    {
-      struct so_list *new
-	= (struct so_list *) xmalloc (sizeof (struct so_list));
-      struct cleanup *old_chain = make_cleanup (xfree, new);
-
-      memset (new, 0, sizeof (*new));
-
-      new->lm_info = xmalloc (sizeof (struct lm_info));
-      make_cleanup (xfree, new->lm_info);
-
-      new->lm_info->lm = xmalloc (sizeof (struct link_map));
-      make_cleanup (xfree, new->lm_info->lm);
-      memset (new->lm_info->lm, 0, sizeof (struct link_map));
-
-      read_memory (lm, new->lm_info->lm, sizeof (struct link_map));
-
-      lm = lm_next (new);
-
-      /* Extract this shared object's name.  */
-      target_read_string (lm_name (new), &buffer,
-			  SO_NAME_MAX_PATH_SIZE - 1, &errcode);
-      if (errcode != 0)
-	warning (_("Can't read pathname for load map: %s."),
-		 safe_strerror (errcode));
-      else
-	{
-	  strncpy (new->so_name, buffer, SO_NAME_MAX_PATH_SIZE - 1);
-	  new->so_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0';
-	  xfree (buffer);
-	  strcpy (new->so_original_name, new->so_name);
-	}
-
-      /* If this entry has no name, or its name matches the name
-	 for the main executable, don't include it in the list.  */
-      if (! new->so_name[0]
-	  || match_main (new->so_name))
-	free_so (new);
-      else
-	{
-	  new->next = 0;
-	  *link_ptr = new;
-	  link_ptr = &new->next;
-	}
-
-      discard_cleanups (old_chain);
-    }
-
-  return head;
-}
-
-
-/* On some systems, the only way to recognize the link map entry for
-   the main executable file is by looking at its name.  Return
-   non-zero iff SONAME matches one of the known main executable names.  */
-
-static int
-match_main (char *soname)
-{
-  char **mainp;
-
-  for (mainp = main_name_list; *mainp != NULL; mainp++)
-    {
-      if (strcmp (soname, *mainp) == 0)
-	return (1);
-    }
-
-  return (0);
-}
-
-
-static int
-sunos_in_dynsym_resolve_code (CORE_ADDR pc)
-{
-  return 0;
-}
-
-/* Remove the "mapping changed" breakpoint.
-
-   Removes the breakpoint that gets hit when the dynamic linker
-   completes a mapping change.  */
-
-static int
-disable_break (void)
-{
-  CORE_ADDR breakpoint_addr;	/* Address where end bkpt is set.  */
-
-  int in_debugger = 0;
-
-  /* Read the debugger structure from the inferior to retrieve the
-     address of the breakpoint and the original contents of the
-     breakpoint address.  Remove the breakpoint by writing the original
-     contents back.  */
-
-  read_memory (debug_addr, (char *) &debug_copy, sizeof (debug_copy));
-
-  /* Set `in_debugger' to zero now.  */
-
-  write_memory (flag_addr, (char *) &in_debugger, sizeof (in_debugger));
-
-  breakpoint_addr = SOLIB_EXTRACT_ADDRESS (debug_copy.ldd_bp_addr);
-  write_memory (breakpoint_addr, (char *) &debug_copy.ldd_bp_inst,
-		sizeof (debug_copy.ldd_bp_inst));
-
-  /* For the SVR4 version, we always know the breakpoint address.  For the
-     SunOS version we don't know it until the above code is executed.
-     Grumble if we are stopped anywhere besides the breakpoint address.  */
-
-  if (stop_pc != breakpoint_addr)
-    {
-      warning (_("stopped at unknown breakpoint "
-		 "while handling shared libraries"));
-    }
-
-  return 1;
-}
-
-/* Arrange for dynamic linker to hit breakpoint.
-
-   Both the SunOS and the SVR4 dynamic linkers have, as part of their
-   debugger interface, support for arranging for the inferior to hit
-   a breakpoint after mapping in the shared libraries.  This function
-   enables that breakpoint.
-
-   For SunOS, there is a special flag location (in_debugger) which we
-   set to 1.  When the dynamic linker sees this flag set, it will set
-   a breakpoint at a location known only to itself, after saving the
-   original contents of that place and the breakpoint address itself,
-   in it's own internal structures.  When we resume the inferior, it
-   will eventually take a SIGTRAP when it runs into the breakpoint.
-   We handle this (in a different place) by restoring the contents of
-   the breakpointed location (which is only known after it stops),
-   chasing around to locate the shared libraries that have been
-   loaded, then resuming.
-
-   For SVR4, the debugger interface structure contains a member (r_brk)
-   which is statically initialized at the time the shared library is
-   built, to the offset of a function (_r_debug_state) which is guaran-
-   teed to be called once before mapping in a library, and again when
-   the mapping is complete.  At the time we are examining this member,
-   it contains only the unrelocated offset of the function, so we have
-   to do our own relocation.  Later, when the dynamic linker actually
-   runs, it relocates r_brk to be the actual address of _r_debug_state().
-
-   The debugger interface structure also contains an enumeration which
-   is set to either RT_ADD or RT_DELETE prior to changing the mapping,
-   depending upon whether or not the library is being mapped or
-   unmapped, and then set to RT_CONSISTENT after the library is
-   mapped/unmapped.  */
-
-static int
-enable_break (void)
-{
-  int success = 0;
-  int j;
-  int in_debugger;
-
-  /* Get link_dynamic structure.  */
-
-  j = target_read_memory (debug_base, (char *) &dynamic_copy,
-			  sizeof (dynamic_copy));
-  if (j)
-    {
-      /* unreadable */
-      return (0);
-    }
-
-  /* Calc address of debugger interface structure.  */
-
-  debug_addr = SOLIB_EXTRACT_ADDRESS (dynamic_copy.ldd);
-
-  /* Calc address of `in_debugger' member of debugger interface structure.  */
-
-  flag_addr = debug_addr + (CORE_ADDR) ((char *) &debug_copy.ldd_in_debugger -
-					(char *) &debug_copy);
-
-  /* Write a value of 1 to this member.  */
-
-  in_debugger = 1;
-  write_memory (flag_addr, (char *) &in_debugger, sizeof (in_debugger));
-  success = 1;
-
-  return (success);
-}
-
-/* Implement the "special_symbol_handling" target_so_ops method.
-
-   For SunOS4, this consists of grunging around in the dynamic
-   linkers structures to find symbol definitions for "common" symbols
-   and adding them to the minimal symbol table for the runtime common
-   objfile.  */
-
-static void
-sunos_special_symbol_handling (void)
-{
-  int j;
-
-  if (debug_addr == 0)
-    {
-      /* Get link_dynamic structure.  */
-
-      j = target_read_memory (debug_base, (char *) &dynamic_copy,
-			      sizeof (dynamic_copy));
-      if (j)
-	{
-	  /* unreadable */
-	  return;
-	}
-
-      /* Calc address of debugger interface structure.  */
-      /* FIXME, this needs work for cross-debugging of core files
-         (byteorder, size, alignment, etc).  */
-
-      debug_addr = SOLIB_EXTRACT_ADDRESS (dynamic_copy.ldd);
-    }
-
-  /* Read the debugger structure from the inferior, just to make sure
-     we have a current copy.  */
-
-  j = target_read_memory (debug_addr, (char *) &debug_copy,
-			  sizeof (debug_copy));
-  if (j)
-    return;			/* unreadable */
-
-  /* Get common symbol definitions for the loaded object.  */
-
-  if (debug_copy.ldd_cp)
-    {
-      solib_add_common_symbols (SOLIB_EXTRACT_ADDRESS (debug_copy.ldd_cp));
-    }
-}
-
-/* Implement the "create_inferior_hook" target_solib_ops method.
-
-   For SunOS executables, this first instruction is typically the
-   one at "_start", or a similar text label, regardless of whether
-   the executable is statically or dynamically linked.  The runtime
-   startup code takes care of dynamically linking in any shared
-   libraries, once gdb allows the inferior to continue.
-
-   We can arrange to cooperate with the dynamic linker to discover the
-   names of shared libraries that are dynamically linked, and the base
-   addresses to which they are linked.
-
-   This function is responsible for discovering those names and
-   addresses, and saving sufficient information about them to allow
-   their symbols to be read at a later time.
-
-   FIXME
-
-   Between enable_break() and disable_break(), this code does not
-   properly handle hitting breakpoints which the user might have
-   set in the startup code or in the dynamic linker itself.  Proper
-   handling will probably have to wait until the implementation is
-   changed to use the "breakpoint handler function" method.
-
-   Also, what if child has exit()ed?  Must exit loop somehow.  */
-
-static void
-sunos_solib_create_inferior_hook (int from_tty)
-{
-  struct thread_info *tp;
-  struct inferior *inf;
-
-  if ((debug_base = locate_base ()) == 0)
-    {
-      /* Can't find the symbol or the executable is statically linked.  */
-      return;
-    }
-
-  if (!enable_break ())
-    {
-      warning (_("shared library handler failed to enable breakpoint"));
-      return;
-    }
-
-  /* SCO and SunOS need the loop below, other systems should be using the
-     special shared library breakpoints and the shared library breakpoint
-     service routine.
-
-     Now run the target.  It will eventually hit the breakpoint, at
-     which point all of the libraries will have been mapped in and we
-     can go groveling around in the dynamic linker structures to find
-     out what we need to know about them.  */
-
-  inf = current_inferior ();
-  tp = inferior_thread ();
-
-  clear_proceed_status ();
-
-  inf->control.stop_soon = STOP_QUIETLY;
-  tp->suspend.stop_signal = GDB_SIGNAL_0;
-  do
-    {
-      target_resume (pid_to_ptid (-1), 0, tp->suspend.stop_signal);
-      wait_for_inferior ();
-    }
-  while (tp->suspend.stop_signal != GDB_SIGNAL_TRAP);
-  inf->control.stop_soon = NO_STOP_QUIETLY;
-
-  /* We are now either at the "mapping complete" breakpoint (or somewhere
-     else, a condition we aren't prepared to deal with anyway), so adjust
-     the PC as necessary after a breakpoint, disable the breakpoint, and
-     add any shared libraries that were mapped in.
-
-     Note that adjust_pc_after_break did not perform any PC adjustment,
-     as the breakpoint the inferior just hit was not inserted by GDB,
-     but by the dynamic loader itself, and is therefore not found on
-     the GDB software break point list.  Thus we have to adjust the
-     PC here.  */
-
-  if (gdbarch_decr_pc_after_break (target_gdbarch ()))
-    {
-      stop_pc -= gdbarch_decr_pc_after_break (target_gdbarch ());
-      regcache_write_pc (get_current_regcache (), stop_pc);
-    }
-
-  if (!disable_break ())
-    {
-      warning (_("shared library handler failed to disable breakpoint"));
-    }
-
-  solib_add ((char *) 0, 0, (struct target_ops *) 0, auto_solib_add);
-}
-
-static void
-sunos_clear_solib (void)
-{
-  debug_base = 0;
-}
-
-static void
-sunos_free_so (struct so_list *so)
-{
-  xfree (so->lm_info->lm);
-  xfree (so->lm_info);
-}
-
-static void
-sunos_relocate_section_addresses (struct so_list *so,
-				  struct target_section *sec)
-{
-  sec->addr += lm_addr (so);
-  sec->endaddr += lm_addr (so);
-}
-
-static struct target_so_ops sunos_so_ops;
-
-void
-_initialize_sunos_solib (void)
-{
-  sunos_so_ops.relocate_section_addresses = sunos_relocate_section_addresses;
-  sunos_so_ops.free_so = sunos_free_so;
-  sunos_so_ops.clear_solib = sunos_clear_solib;
-  sunos_so_ops.solib_create_inferior_hook = sunos_solib_create_inferior_hook;
-  sunos_so_ops.special_symbol_handling = sunos_special_symbol_handling;
-  sunos_so_ops.current_sos = sunos_current_sos;
-  sunos_so_ops.open_symbol_file_object = open_symbol_file_object;
-  sunos_so_ops.in_dynsym_resolve_code = sunos_in_dynsym_resolve_code;
-  sunos_so_ops.bfd_open = solib_bfd_open;
-
-  /* FIXME: Don't do this here.  *_gdbarch_init() should set so_ops.  */
-  current_target_so_ops = &sunos_so_ops;
-}
diff --git a/gdb/symfile.c b/gdb/symfile.c
index 284f064..b32a550 100644
--- a/gdb/symfile.c
+++ b/gdb/symfile.c
@@ -2343,7 +2343,6 @@ reread_symbols (void)
 
   for (objfile = object_files; objfile; objfile = objfile->next)
     {
-      /* solib-sunos.c creates one objfile with obfd.  */
       if (objfile->obfd == NULL)
 	continue;