gdb/objfiles: make objfile::sections yield references

I wrote this as a preparatory patch while attempting to make
objfile::section_iterator use filtered_iterator.  It turned out not so
easy, so I have put it aside for now.  But now I have this patch, so I
thought I'd send it by itself.

Since the `obj_section *` yielded by the iterator can't be nullptr, I
think it makes sense for the iterator to yield references instead.
Just like you would get if you iterated on an std::vector<obj_section>.

Change-Id: I7bbee50ed52599e64c4f3b06bdbbde597feba9aa

gdb/arm-tdep.c

@@ -2504,15 +2504,15 @@ static const registry<bfd>::key<arm_exidx_data> arm_exidx_data_key;
 static struct obj_section *
 arm_obj_section_from_vma (struct objfile *objfile, bfd_vma vma)
 {
-  for (obj_section *osect : objfile->sections ())
+  for (obj_section &osect : objfile->sections ())
-    if (bfd_section_flags (osect->the_bfd_section) & SEC_ALLOC)
+    if (bfd_section_flags (osect.the_bfd_section) & SEC_ALLOC)
       {
 	bfd_vma start, size;
-	start = bfd_section_vma (osect->the_bfd_section);
+	start = bfd_section_vma (osect.the_bfd_section);
-	size = bfd_section_size (osect->the_bfd_section);
+	size = bfd_section_size (osect.the_bfd_section);
 
 	if (start <= vma && vma < start + size)
-	  return osect;
+	  return &osect;
       }
 
   return NULL;

gdb/exec.c

@@ -653,13 +653,13 @@ program_space::add_target_sections (struct objfile *objfile)
   gdb_assert (objfile != nullptr);
 
   /* Compute the number of sections to add.  */
-  for (obj_section *osect : objfile->sections ())
+  for (obj_section &osect : objfile->sections ())
     {
-      if (bfd_section_size (osect->the_bfd_section) == 0)
+      if (bfd_section_size (osect.the_bfd_section) == 0)
 	continue;
 
-      m_target_sections.emplace_back (osect->addr (), osect->endaddr (),
+      m_target_sections.emplace_back (osect.addr (), osect.endaddr (),
-				      osect->the_bfd_section, objfile);
+				      osect.the_bfd_section, objfile);
     }
 }
 

gdb/gcore.c

@@ -425,13 +425,13 @@ gcore_create_callback (CORE_ADDR vaddr, unsigned long size, int read,
 	 If so, we can avoid copying its contents by clearing SEC_LOAD.  */
 
       for (objfile *objfile : current_program_space->objfiles ())
-	for (obj_section *objsec : objfile->sections ())
+	for (obj_section &objsec : objfile->sections ())
 	  {
 	    bfd *abfd = objfile->obfd.get ();
-	    asection *asec = objsec->the_bfd_section;
+	    asection *asec = objsec.the_bfd_section;
 	    bfd_vma align = (bfd_vma) 1 << bfd_section_alignment (asec);
-	    bfd_vma start = objsec->addr () & -align;
+	    bfd_vma start = objsec.addr () & -align;
-	    bfd_vma end = (objsec->endaddr () + align - 1) & -align;
+	    bfd_vma end = (objsec.endaddr () + align - 1) & -align;
 
 	    /* Match if either the entire memory region lies inside the
 	       section (i.e. a mapping covering some pages of a large
@@ -533,9 +533,9 @@ objfile_find_memory_regions (struct target_ops *self,
 
   /* Call callback function for each objfile section.  */
   for (objfile *objfile : current_program_space->objfiles ())
-    for (obj_section *objsec : objfile->sections ())
+    for (obj_section &objsec : objfile->sections ())
       {
-	asection *isec = objsec->the_bfd_section;
+	asection *isec = objsec.the_bfd_section;
 	flagword flags = bfd_section_flags (isec);
 
 	/* Separate debug info files are irrelevant for gcore.  */
@@ -547,7 +547,7 @@ objfile_find_memory_regions (struct target_ops *self,
 	    int size = bfd_section_size (isec);
 	    int ret;
 
-	    ret = (*func) (objsec->addr (), size,
+	    ret = (*func) (objsec.addr (), size,
 			   1, /* All sections will be readable.  */
 			   (flags & SEC_READONLY) == 0, /* Writable.  */
 			   (flags & SEC_CODE) != 0, /* Executable.  */

gdb/hppa-bsd-tdep.c

@@ -54,12 +54,12 @@ hppabsd_find_global_pointer (struct gdbarch *gdbarch, struct value *function)
   faddr_sec = find_pc_section (faddr);
   if (faddr_sec != NULL)
     {
-      for (struct obj_section *sec : faddr_sec->objfile->sections ())
+      for (struct obj_section &sec : faddr_sec->objfile->sections ())
 	{
-	  if (strcmp (sec->the_bfd_section->name, ".dynamic") == 0)
+	  if (strcmp (sec.the_bfd_section->name, ".dynamic") == 0)
 	    {
-	      CORE_ADDR addr = sec->addr ();
+	      CORE_ADDR addr = sec.addr ();
-	      CORE_ADDR endaddr = sec->endaddr ();
+	      CORE_ADDR endaddr = sec.endaddr ();
 
 	      while (addr < endaddr)
 		{
@@ -81,7 +81,7 @@ hppabsd_find_global_pointer (struct gdbarch *gdbarch, struct value *function)
 			 DT_PLTGOT, so we have to do it ourselves.  */
 		      pltgot = extract_unsigned_integer (buf, sizeof buf,
 							 byte_order);
-		      pltgot += sec->objfile->text_section_offset ();
+		      pltgot += sec.objfile->text_section_offset ();
 
 		      return pltgot;
 		    }

gdb/hppa-linux-tdep.c

@@ -362,14 +362,14 @@ hppa_linux_find_global_pointer (struct gdbarch *gdbarch,
   faddr_sect = find_pc_section (faddr);
   if (faddr_sect != NULL)
     {
-      for (obj_section *osect : faddr_sect->objfile->sections ())
+      for (obj_section &osect : faddr_sect->objfile->sections ())
 	{
-	  if (strcmp (osect->the_bfd_section->name, ".dynamic") == 0)
+	  if (strcmp (osect.the_bfd_section->name, ".dynamic") == 0)
 	    {
 	      CORE_ADDR addr, endaddr;
 
-	      addr = osect->addr ();
+	      addr = osect.addr ();
-	      endaddr = osect->endaddr ();
+	      endaddr = osect.endaddr ();
 
 	      while (addr < endaddr)
 		{

gdb/hppa-tdep.c

@@ -920,12 +920,12 @@ hppa64_convert_code_addr_to_fptr (struct gdbarch *gdbarch, CORE_ADDR code)
   if (!(sec->the_bfd_section->flags & SEC_CODE))
     return code;
 
-  for (obj_section *opd : sec->objfile->sections ())
+  for (obj_section &opd : sec->objfile->sections ())
     {
-      if (strcmp (opd->the_bfd_section->name, ".opd") == 0)
+      if (strcmp (opd.the_bfd_section->name, ".opd") == 0)
 	{
-	  for (CORE_ADDR addr = opd->addr ();
+	  for (CORE_ADDR addr = opd.addr ();
-	       addr < opd->endaddr ();
+	       addr < opd.endaddr ();
 	       addr += 2 * 8)
 	    {
 	      ULONGEST opdaddr;

gdb/ia64-tdep.c

@@ -3432,12 +3432,12 @@ ia64_find_global_pointer_from_dynamic_section (struct gdbarch *gdbarch,
   faddr_sect = find_pc_section (faddr);
   if (faddr_sect != NULL)
     {
-      for (obj_section *osect : faddr_sect->objfile->sections ())
+      for (obj_section &osect : faddr_sect->objfile->sections ())
 	{
-	  if (strcmp (osect->the_bfd_section->name, ".dynamic") == 0)
+	  if (strcmp (osect.the_bfd_section->name, ".dynamic") == 0)
 	    {
-	      CORE_ADDR addr = osect->addr ();
+	      CORE_ADDR addr = osect.addr ();
-	      CORE_ADDR endaddr = osect->endaddr ();
+	      CORE_ADDR endaddr = osect.endaddr ();
 
 	      while (addr < endaddr)
 		{
@@ -3513,12 +3513,12 @@ find_extant_func_descr (struct gdbarch *gdbarch, CORE_ADDR faddr)
 
   if (faddr_sect != NULL)
     {
-      for (obj_section *osect : faddr_sect->objfile->sections ())
+      for (obj_section &osect : faddr_sect->objfile->sections ())
 	{
-	  if (strcmp (osect->the_bfd_section->name, ".opd") == 0)
+	  if (strcmp (osect.the_bfd_section->name, ".opd") == 0)
 	    {
-	      CORE_ADDR addr = osect->addr ();
+	      CORE_ADDR addr = osect.addr ();
-	      CORE_ADDR endaddr = osect->endaddr ();
+	      CORE_ADDR endaddr = osect.endaddr ();
 
 	      while (addr < endaddr)
 		{

gdb/machoread.c

@@ -901,13 +901,13 @@ macho_symfile_offsets (struct objfile *objfile,
 
   for (i = 0; i < addrs.size (); i++)
     {
-      for (obj_section *osect : objfile->sections ())
+      for (obj_section &osect : objfile->sections ())
 	{
-	  const char *bfd_sect_name = osect->the_bfd_section->name;
+	  const char *bfd_sect_name = osect.the_bfd_section->name;
 
 	  if (bfd_sect_name == addrs[i].name)
 	    {
-	      osect->set_offset (addrs[i].addr);
+	      osect.set_offset (addrs[i].addr);
 	      break;
 	    }
 	}
@@ -915,10 +915,10 @@ macho_symfile_offsets (struct objfile *objfile,
 
   objfile->sect_index_text = 0;
 
-  for (obj_section *osect : objfile->sections ())
+  for (obj_section &osect : objfile->sections ())
     {
-      const char *bfd_sect_name = osect->the_bfd_section->name;
+      const char *bfd_sect_name = osect.the_bfd_section->name;
-      int sect_index = osect - objfile->sections_start;
+      int sect_index = &osect - objfile->sections_start;
 
       if (startswith (bfd_sect_name, "LC_SEGMENT."))
 	bfd_sect_name += 11;

gdb/maint.c

@@ -582,9 +582,9 @@ maintenance_translate_address (const char *arg, int from_tty)
       p = skip_spaces (p + 1);
 
       for (objfile *objfile : current_program_space->objfiles ())
-	for (obj_section *iter : objfile->sections ())
+	for (obj_section &iter : objfile->sections ())
 	  {
-	    if (strncmp (iter->the_bfd_section->name, arg, arg_len) == 0)
+	    if (strncmp (iter.the_bfd_section->name, arg, arg_len) == 0)
 	      goto found;
 	  }
 

gdb/minsyms.c

@@ -712,11 +712,11 @@ static int
 frob_address (struct objfile *objfile, CORE_ADDR pc,
 	      unrelocated_addr *unrel_addr)
 {
-  for (obj_section *iter : objfile->sections ())
+  for (obj_section &iter : objfile->sections ())
     {
-      if (iter->contains (pc))
+      if (iter.contains (pc))
 	{
-	  *unrel_addr = unrelocated_addr (pc - iter->offset ());
+	  *unrel_addr = unrelocated_addr (pc - iter.offset ());
 	  return 1;
 	}
     }

gdb/objfiles.c

@@ -587,12 +587,12 @@ objfile_relocate1 (struct objfile *objfile,
   get_objfile_pspace_data (objfile->pspace ())->section_map_dirty = 1;
 
   /* Update the table in exec_ops, used to read memory.  */
-  for (obj_section *s : objfile->sections ())
+  for (obj_section &s : objfile->sections ())
     {
-      int idx = s - objfile->sections_start;
+      int idx = &s - objfile->sections_start;
 
       exec_set_section_address (bfd_get_filename (objfile->obfd.get ()), idx,
-				s->addr ());
+				s.addr ());
     }
 
   /* Data changed.  */
@@ -790,10 +790,10 @@ sort_cmp (const struct obj_section *sect1, const obj_section *sect2)
 	     second case shouldn't occur during normal use, but std::sort
 	     does check that '!(a < a)' when compiled in debug mode.  */
 
-	  for (const obj_section *osect : objfile1->sections ())
+	  for (const obj_section &osect : objfile1->sections ())
-	    if (osect == sect2)
+	    if (&osect == sect2)
 	      return false;
-	    else if (osect == sect1)
+	    else if (&osect == sect1)
 	      return true;
 
 	  /* We should have found one of the sections before getting here.  */
@@ -994,8 +994,8 @@ update_section_map (struct program_space *pspace,
 
   alloc_size = 0;
   for (objfile *objfile : pspace->objfiles ())
-    for (obj_section *s : objfile->sections ())
+    for (obj_section &s : objfile->sections ())
-      if (insert_section_p (objfile->obfd.get (), s->the_bfd_section))
+      if (insert_section_p (objfile->obfd.get (), s.the_bfd_section))
 	alloc_size += 1;
 
   /* This happens on detach/attach (e.g. in gdb.base/attach.exp).  */
@@ -1010,9 +1010,9 @@ update_section_map (struct program_space *pspace,
 
   i = 0;
   for (objfile *objfile : pspace->objfiles ())
-    for (obj_section *s : objfile->sections ())
+    for (obj_section &s : objfile->sections ())
-      if (insert_section_p (objfile->obfd.get (), s->the_bfd_section))
+      if (insert_section_p (objfile->obfd.get (), s.the_bfd_section))
-	map[i++] = s;
+	map[i++] = &s;
 
   std::sort (map, map + alloc_size, sort_cmp);
   map_size = filter_debuginfo_sections(map, alloc_size);
@@ -1127,12 +1127,12 @@ is_addr_in_objfile (CORE_ADDR addr, const struct objfile *objfile)
   if (objfile == NULL)
     return false;
 
-  for (obj_section *osect : objfile->sections ())
+  for (obj_section &osect : objfile->sections ())
     {
-      if (section_is_overlay (osect) && !section_is_mapped (osect))
+      if (section_is_overlay (&osect) && !section_is_mapped (&osect))
 	continue;
 
-      if (osect->contains (addr))
+      if (osect.contains (addr))
 	return true;
     }
   return false;

gdb/objfiles.h

@@ -665,11 +665,11 @@ public:
     section_iterator &operator= (const section_iterator &) = default;
     section_iterator &operator= (section_iterator &&) = default;
 
-    typedef section_iterator self_type;
+    using self_type = section_iterator;
-    typedef obj_section *value_type;
+    using reference = obj_section &;
 
-    value_type operator* ()
+    reference operator* ()
-    { return m_iter; }
+    { return *m_iter; }
 
     section_iterator &operator++ ()
     {
@@ -701,8 +701,8 @@ public:
 	++m_iter;
     }
 
-    value_type m_iter;
+    obj_section *m_iter;
-    value_type m_end;
+    obj_section *m_end;
   };
 
   iterator_range<section_iterator> sections ()

gdb/printcmd.c

@@ -1494,27 +1494,27 @@ info_symbol_command (const char *arg, int from_tty)
 
   addr = parse_and_eval_address (arg);
   for (objfile *objfile : current_program_space->objfiles ())
-    for (obj_section *osect : objfile->sections ())
+    for (obj_section &osect : objfile->sections ())
       {
 	/* Only process each object file once, even if there's a separate
 	   debug file.  */
 	if (objfile->separate_debug_objfile_backlink)
 	  continue;
 
-	sect_addr = overlay_mapped_address (addr, osect);
+	sect_addr = overlay_mapped_address (addr, &osect);
 
-	if (osect->contains (sect_addr)
+	if (osect.contains (sect_addr)
 	    && (msymbol
 		= lookup_minimal_symbol_by_pc_section (sect_addr,
-						       osect).minsym))
+						       &osect).minsym))
 	  {
 	    const char *obj_name, *mapped, *sec_name, *msym_name;
 	    const char *loc_string;
 
 	    matches = 1;
 	    offset = sect_addr - msymbol->value_address (objfile);
-	    mapped = section_is_mapped (osect) ? _("mapped") : _("unmapped");
+	    mapped = section_is_mapped (&osect) ? _("mapped") : _("unmapped");
-	    sec_name = osect->the_bfd_section->name;
+	    sec_name = osect.the_bfd_section->name;
 	    msym_name = msymbol->print_name ();
 
 	    /* Don't print the offset if it is zero.
@@ -1528,12 +1528,12 @@ info_symbol_command (const char *arg, int from_tty)
 	    else
 	      loc_string = msym_name;
 
-	    gdb_assert (osect->objfile && objfile_name (osect->objfile));
+	    gdb_assert (osect.objfile && objfile_name (osect.objfile));
-	    obj_name = objfile_name (osect->objfile);
+	    obj_name = objfile_name (osect.objfile);
 
 	    if (current_program_space->multi_objfile_p ())
-	      if (pc_in_unmapped_range (addr, osect))
+	      if (pc_in_unmapped_range (addr, &osect))
-		if (section_is_overlay (osect))
+		if (section_is_overlay (&osect))
 		  gdb_printf (_("%s in load address range of "
 				"%s overlay section %s of %s\n"),
 			      loc_string, mapped, sec_name, obj_name);
@@ -1542,15 +1542,15 @@ info_symbol_command (const char *arg, int from_tty)
 				"section %s of %s\n"),
 			      loc_string, sec_name, obj_name);
 	      else
-		if (section_is_overlay (osect))
+		if (section_is_overlay (&osect))
 		  gdb_printf (_("%s in %s overlay section %s of %s\n"),
 			      loc_string, mapped, sec_name, obj_name);
 		else
 		  gdb_printf (_("%s in section %s of %s\n"),
 			      loc_string, sec_name, obj_name);
 	    else
-	      if (pc_in_unmapped_range (addr, osect))
+	      if (pc_in_unmapped_range (addr, &osect))
-		if (section_is_overlay (osect))
+		if (section_is_overlay (&osect))
 		  gdb_printf (_("%s in load address range of %s overlay "
 				"section %s\n"),
 			      loc_string, mapped, sec_name);
@@ -1559,7 +1559,7 @@ info_symbol_command (const char *arg, int from_tty)
 		    (_("%s in load address range of section %s\n"),
 		     loc_string, sec_name);
 	      else
-		if (section_is_overlay (osect))
+		if (section_is_overlay (&osect))
 		  gdb_printf (_("%s in %s overlay section %s\n"),
 			      loc_string, mapped, sec_name);
 		else

gdb/solib-aix.c

@@ -622,9 +622,9 @@ aix_solib_ops::bfd_open (const char *pathname) const
 static struct obj_section *
 data_obj_section_from_objfile (struct objfile *objfile)
 {
-  for (obj_section *osect : objfile->sections ())
+  for (obj_section &osect : objfile->sections ())
-    if (strcmp (bfd_section_name (osect->the_bfd_section), ".data") == 0)
+    if (strcmp (bfd_section_name (osect.the_bfd_section), ".data") == 0)
-      return osect;
+      return &osect;
 
   return NULL;
 }

gdb/solib-dsbt.c

@@ -816,16 +816,16 @@ dsbt_relocate_main_executable (void)
   section_offsets new_offsets (objf->section_offsets.size ());
   changed = 0;
 
-  for (obj_section *osect : objf->sections ())
+  for (obj_section &osect : objf->sections ())
     {
       CORE_ADDR orig_addr, addr, offset;
       int osect_idx;
       int seg;
 
-      osect_idx = osect - objf->sections_start;
+      osect_idx = &osect - objf->sections_start;
 
       /* Current address of section.  */
-      addr = osect->addr ();
+      addr = osect.addr ();
       /* Offset from where this section started.  */
       offset = objf->section_offsets[osect_idx];
       /* Original address prior to any past relocations.  */

gdb/solib-frv.c

@@ -750,16 +750,16 @@ frv_relocate_main_executable (void)
   section_offsets new_offsets (objf->section_offsets.size ());
   changed = 0;
 
-  for (obj_section *osect : objf->sections ())
+  for (obj_section &osect : objf->sections ())
     {
       CORE_ADDR orig_addr, addr, offset;
       int osect_idx;
       int seg;
-      
+
-      osect_idx = osect - objf->sections_start;
+      osect_idx = &osect - objf->sections_start;
 
       /* Current address of section.  */
-      addr = osect->addr ();
+      addr = osect.addr ();
       /* Offset from where this section started.  */
       offset = objf->section_offsets[osect_idx];
       /* Original address prior to any past relocations.  */

gdb/solib-svr4.c

@@ -1622,8 +1622,8 @@ is_thread_local_section (struct bfd_section *bfd_sect)
 static bool
 has_thread_local_section (const objfile *objf)
 {
-  for (obj_section *objsec : objf->sections ())
+  for (obj_section &objsec : objf->sections ())
-    if (is_thread_local_section (objsec->the_bfd_section))
+    if (is_thread_local_section (objsec.the_bfd_section))
       return true;
   return false;
 }

gdb/symfile.c

@@ -835,9 +835,9 @@ init_entry_point_info (struct objfile *objfile)
 	= gdbarch_addr_bits_remove (objfile->arch (), entry_point);
 
       found = 0;
-      for (obj_section *osect : objfile->sections ())
+      for (obj_section &osect : objfile->sections ())
 	{
-	  struct bfd_section *sect = osect->the_bfd_section;
+	  struct bfd_section *sect = osect.the_bfd_section;
 
 	  if (entry_point >= bfd_section_vma (sect)
 	      && entry_point < (bfd_section_vma (sect)
@@ -3007,9 +3007,9 @@ static void
 overlay_invalidate_all (program_space *pspace)
 {
   for (objfile *objfile : pspace->objfiles ())
-    for (obj_section *sect : objfile->sections ())
+    for (obj_section &sect : objfile->sections ())
-      if (section_is_overlay (sect))
+      if (section_is_overlay (&sect))
-	sect->ovly_mapped = -1;
+	sect.ovly_mapped = -1;
 }
 
 /* Function: section_is_mapped (SECTION)
@@ -3183,18 +3183,18 @@ find_pc_overlay (CORE_ADDR pc)
   if (overlay_debugging)
     {
       for (objfile *objfile : current_program_space->objfiles ())
-	for (obj_section *osect : objfile->sections ())
+	for (obj_section &osect : objfile->sections ())
-	  if (section_is_overlay (osect))
+	  if (section_is_overlay (&osect))
 	    {
-	      if (pc_in_mapped_range (pc, osect))
+	      if (pc_in_mapped_range (pc, &osect))
 		{
-		  if (section_is_mapped (osect))
+		  if (section_is_mapped (&osect))
-		    return osect;
+		    return &osect;
 		  else
-		    best_match = osect;
+		    best_match = &osect;
 		}
-	      else if (pc_in_unmapped_range (pc, osect))
+	      else if (pc_in_unmapped_range (pc, &osect))
-		best_match = osect;
+		best_match = &osect;
 	    }
     }
   return best_match;
@@ -3210,9 +3210,9 @@ find_pc_mapped_section (CORE_ADDR pc)
   if (overlay_debugging)
     {
       for (objfile *objfile : current_program_space->objfiles ())
-	for (obj_section *osect : objfile->sections ())
+	for (obj_section &osect : objfile->sections ())
-	  if (pc_in_mapped_range (pc, osect) && section_is_mapped (osect))
+	  if (pc_in_mapped_range (pc, &osect) && section_is_mapped (&osect))
-	    return osect;
+	    return &osect;
     }
 
   return NULL;
@@ -3229,18 +3229,18 @@ list_overlays_command (const char *args, int from_tty)
   if (overlay_debugging)
     {
       for (objfile *objfile : current_program_space->objfiles ())
-	for (obj_section *osect : objfile->sections ())
+	for (obj_section &osect : objfile->sections ())
-	  if (section_is_mapped (osect))
+	  if (section_is_mapped (&osect))
 	    {
 	      struct gdbarch *gdbarch = objfile->arch ();
 	      const char *name;
 	      bfd_vma lma, vma;
 	      int size;
 
-	      vma = bfd_section_vma (osect->the_bfd_section);
+	      vma = bfd_section_vma (osect.the_bfd_section);
-	      lma = bfd_section_lma (osect->the_bfd_section);
+	      lma = bfd_section_lma (osect.the_bfd_section);
-	      size = bfd_section_size (osect->the_bfd_section);
+	      size = bfd_section_size (osect.the_bfd_section);
-	      name = bfd_section_name (osect->the_bfd_section);
+	      name = bfd_section_name (osect.the_bfd_section);
 
 	      gdb_printf ("Section %s, loaded at ", name);
 	      gdb_puts (paddress (gdbarch, lma));
@@ -3275,27 +3275,27 @@ map_overlay_command (const char *args, int from_tty)
 
   /* First, find a section matching the user supplied argument.  */
   for (objfile *obj_file : current_program_space->objfiles ())
-    for (obj_section *sec : obj_file->sections ())
+    for (obj_section &sec : obj_file->sections ())
-      if (!strcmp (bfd_section_name (sec->the_bfd_section), args))
+      if (!strcmp (bfd_section_name (sec.the_bfd_section), args))
 	{
 	  /* Now, check to see if the section is an overlay.  */
-	  if (!section_is_overlay (sec))
+	  if (!section_is_overlay (&sec))
 	    continue;		/* not an overlay section */
 
 	  /* Mark the overlay as "mapped".  */
-	  sec->ovly_mapped = 1;
+	  sec.ovly_mapped = 1;
 
 	  /* Next, make a pass and unmap any sections that are
 	     overlapped by this new section: */
 	  for (objfile *objfile2 : current_program_space->objfiles ())
-	    for (obj_section *sec2 : objfile2->sections ())
+	    for (obj_section &sec2 : objfile2->sections ())
-	      if (sec2->ovly_mapped && sec != sec2 && sections_overlap (sec,
+	      if (sec2.ovly_mapped && &sec != &sec2 && sections_overlap (&sec,
-									sec2))
+									 &sec2))
 		{
 		  if (info_verbose)
 		    gdb_printf (_("Note: section %s unmapped by overlap\n"),
-				bfd_section_name (sec2->the_bfd_section));
+				bfd_section_name (sec2.the_bfd_section));
-		  sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2.  */
+		  sec2.ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2.  */
 		}
 	  return;
 	}
@@ -3319,12 +3319,12 @@ unmap_overlay_command (const char *args, int from_tty)
 
   /* First, find a section matching the user supplied argument.  */
   for (objfile *objfile : current_program_space->objfiles ())
-    for (obj_section *sec : objfile->sections ())
+    for (obj_section &sec : objfile->sections ())
-      if (!strcmp (bfd_section_name (sec->the_bfd_section), args))
+      if (!strcmp (bfd_section_name (sec.the_bfd_section), args))
 	{
-	  if (!sec->ovly_mapped)
+	  if (!sec.ovly_mapped)
 	    error (_("Section %s is not mapped"), args);
-	  sec->ovly_mapped = 0;
+	  sec.ovly_mapped = 0;
 	  return;
 	}
   error (_("No overlay section called %s"), args);
@@ -3578,17 +3578,17 @@ simple_overlay_update (struct obj_section *osect)
 
   /* Now may as well update all sections, even if only one was requested.  */
   for (objfile *objfile : current_program_space->objfiles ())
-    for (obj_section *sect : objfile->sections ())
+    for (obj_section &sect : objfile->sections ())
-      if (section_is_overlay (sect))
+      if (section_is_overlay (&sect))
 	{
 	  int i;
-	  asection *bsect = sect->the_bfd_section;
+	  asection *bsect = sect.the_bfd_section;
 
 	  for (i = 0; i < cache_novlys; i++)
 	    if (cache_ovly_table[i][VMA] == bfd_section_vma (bsect)
 		&& cache_ovly_table[i][LMA] == bfd_section_lma (bsect))
 	      { /* obj_section matches i'th entry in ovly_table.  */
-		sect->ovly_mapped = cache_ovly_table[i][MAPPED];
+		sect.ovly_mapped = cache_ovly_table[i][MAPPED];
 		break;		/* finished with inner for loop: break out.  */
 	      }
 	}

gdb/symtab.c

@@ -1846,18 +1846,18 @@ fixup_symbol_section (struct symbol *sym, struct objfile *objfile)
 	 this reason, we still attempt a lookup by name prior to doing
 	 a search of the section table.  */
 
-      for (obj_section *s : objfile->sections ())
+      for (obj_section &s : objfile->sections ())
 	{
-	  if ((bfd_section_flags (s->the_bfd_section) & SEC_ALLOC) == 0)
+	  if ((bfd_section_flags (s.the_bfd_section) & SEC_ALLOC) == 0)
 	    continue;
 
-	  int idx = s - objfile->sections_start;
+	  int idx = &s - objfile->sections_start;
 	  CORE_ADDR offset = objfile->section_offsets[idx];
 
 	  if (fallback == -1)
 	    fallback = idx;
 
-	  if (s->addr () - offset <= addr && addr < s->endaddr () - offset)
+	  if (s.addr () - offset <= addr && addr < s.endaddr () - offset)
 	    {
 	      sym->set_section_index (idx);
 	      return;

gdb/xstormy16-tdep.c

@@ -546,14 +546,14 @@ xstormy16_find_jmp_table_entry (struct gdbarch *gdbarch, CORE_ADDR faddr)
       if (!strcmp (faddr_sect->the_bfd_section->name, ".plt"))
 	return faddr;
 
-      for (obj_section *osect : faddr_sect->objfile->sections ())
+      for (obj_section &osect : faddr_sect->objfile->sections ())
 	{
-	  if (!strcmp (osect->the_bfd_section->name, ".plt"))
+	  if (!strcmp (osect.the_bfd_section->name, ".plt"))
 	    {
 	      CORE_ADDR addr, endaddr;
 
-	      addr = osect->addr ();
+	      addr = osect.addr ();
-	      endaddr = osect->endaddr ();
+	      endaddr = osect.endaddr ();
 
 	      for (; addr < endaddr; addr += 2 * xstormy16_inst_size)
 		{

gdb/z80-tdep.c

@@ -962,11 +962,11 @@ z80_overlay_update_1 (struct obj_section *osect)
 
   /* we have interest for sections with same VMA */
   for (objfile *objfile : current_program_space->objfiles ())
-    for (obj_section *sect : objfile->sections ())
+    for (obj_section &sect : objfile->sections ())
-      if (section_is_overlay (sect))
+      if (section_is_overlay (&sect))
 	{
-	  sect->ovly_mapped = (lma == bfd_section_lma (sect->the_bfd_section));
+	  sect.ovly_mapped = (lma == bfd_section_lma (sect.the_bfd_section));
-	  i |= sect->ovly_mapped; /* true, if at least one section is mapped */
+	  i |= sect.ovly_mapped; /* true, if at least one section is mapped */
 	}
   return i;
 }
@@ -985,18 +985,18 @@ z80_overlay_update (struct obj_section *osect)
 
   /* Update all sections, even if only one was requested.  */
   for (objfile *objfile : current_program_space->objfiles ())
-    for (obj_section *sect : objfile->sections ())
+    for (obj_section &sect : objfile->sections ())
       {
-	if (!section_is_overlay (sect))
+	if (!section_is_overlay (&sect))
 	  continue;
 
-	asection *bsect = sect->the_bfd_section;
+	asection *bsect = sect.the_bfd_section;
 	bfd_vma lma = bfd_section_lma (bsect);
 	bfd_vma vma = bfd_section_vma (bsect);
 
 	for (int i = 0; i < cache_novly_regions; ++i)
 	  if (cache_ovly_region_table[i][Z80_VMA] == vma)
-	    sect->ovly_mapped =
+	    sect.ovly_mapped =
 	      (cache_ovly_region_table[i][Z80_MAPPED_TO_LMA] == lma);
       }
 }