Remove do-lookup.h.

It is not necessary/useful anymore to have the content separate
from dl-lookup.c.

1 files changed, 0 insertions, 385 deletions

diff --git a/elf/do-lookup.h b/elf/do-lookup.h
deleted file mode 100644
index 782f490964..0000000000
--- a/elf/do-lookup.h
+++ /dev/null
@@ -1,385 +0,0 @@
-/* Look up a symbol in the loaded objects.
-   Copyright (C) 1995-2007, 2008, 2009 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library 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
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, write to the Free
-   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-   02111-1307 USA.  */
-
-
-/* Inner part of the lookup functions.  We return a value > 0 if we
-   found the symbol, the value 0 if nothing is found and < 0 if
-   something bad happened.  */
-static int
-__attribute_noinline__
-do_lookup_x (const char *undef_name, uint_fast32_t new_hash,
-	     unsigned long int *old_hash, const ElfW(Sym) *ref,
-	     struct sym_val *result, struct r_scope_elem *scope, size_t i,
-	     const struct r_found_version *const version, int flags,
-	     struct link_map *skip, int type_class, struct link_map *undef_map)
-{
-  size_t n = scope->r_nlist;
-  /* Make sure we read the value before proceeding.  Otherwise we
-     might use r_list pointing to the initial scope and r_nlist being
-     the value after a resize.  That is the only path in dl-open.c not
-     protected by GSCOPE.  A read barrier here might be to expensive.  */
-  __asm volatile ("" : "+r" (n), "+m" (scope->r_list));
-  struct link_map **list = scope->r_list;
-
-  do
-    {
-      /* These variables are used in the nested function.  */
-      Elf_Symndx symidx;
-      int num_versions = 0;
-      const ElfW(Sym) *versioned_sym = NULL;
-
-      const struct link_map *map = list[i]->l_real;
-
-      /* Here come the extra test needed for `_dl_lookup_symbol_skip'.  */
-      if (map == skip)
-	continue;
-
-      /* Don't search the executable when resolving a copy reloc.  */
-      if ((type_class & ELF_RTYPE_CLASS_COPY) && map->l_type == lt_executable)
-	continue;
-
-      /* Do not look into objects which are going to be removed.  */
-      if (map->l_removed)
-	continue;
-
-      /* Print some debugging info if wanted.  */
-      if (__builtin_expect (GLRO(dl_debug_mask) & DL_DEBUG_SYMBOLS, 0))
-	_dl_debug_printf ("symbol=%s;  lookup in file=%s [%lu]\n",
-			  undef_name,
-			  map->l_name[0] ? map->l_name : rtld_progname,
-			  map->l_ns);
-
-      /* If the hash table is empty there is nothing to do here.  */
-      if (map->l_nbuckets == 0)
-	continue;
-
-      /* The tables for this map.  */
-      const ElfW(Sym) *symtab = (const void *) D_PTR (map, l_info[DT_SYMTAB]);
-      const char *strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]);
-
-
-      /* Nested routine to check whether the symbol matches.  */
-      const ElfW(Sym) *
-      __attribute_noinline__
-      check_match (const ElfW(Sym) *sym)
-      {
-	unsigned int stt = ELFW(ST_TYPE) (sym->st_info);
-	assert (ELF_RTYPE_CLASS_PLT == 1);
-	if (__builtin_expect ((sym->st_value == 0 /* No value.  */
-			       && stt != STT_TLS)
-			      || (type_class & (sym->st_shndx == SHN_UNDEF)),
-			      0))
-	  return NULL;
-
-	/* Ignore all but STT_NOTYPE, STT_OBJECT, STT_FUNC,
-	   STT_COMMON, STT_TLS, and STT_GNU_IFUNC since these are no
-	   code/data definitions.  */
-#define ALLOWED_STT \
-	((1 << STT_NOTYPE) | (1 << STT_OBJECT) | (1 << STT_FUNC) \
-	 | (1 << STT_COMMON) | (1 << STT_TLS) | (1 << STT_GNU_IFUNC))
-	if (__builtin_expect (((1 << stt) & ALLOWED_STT) == 0, 0))
-	  return NULL;
-
-	if (sym != ref && strcmp (strtab + sym->st_name, undef_name))
-	  /* Not the symbol we are looking for.  */
-	  return NULL;
-
-	const ElfW(Half) *verstab = map->l_versyms;
-	if (version != NULL)
-	  {
-	    if (__builtin_expect (verstab == NULL, 0))
-	      {
-		/* We need a versioned symbol but haven't found any.  If
-		   this is the object which is referenced in the verneed
-		   entry it is a bug in the library since a symbol must
-		   not simply disappear.
-
-		   It would also be a bug in the object since it means that
-		   the list of required versions is incomplete and so the
-		   tests in dl-version.c haven't found a problem.*/
-		assert (version->filename == NULL
-			|| ! _dl_name_match_p (version->filename, map));
-
-		/* Otherwise we accept the symbol.  */
-	      }
-	    else
-	      {
-		/* We can match the version information or use the
-		   default one if it is not hidden.  */
-		ElfW(Half) ndx = verstab[symidx] & 0x7fff;
-		if ((map->l_versions[ndx].hash != version->hash
-		     || strcmp (map->l_versions[ndx].name, version->name))
-		    && (version->hidden || map->l_versions[ndx].hash
-			|| (verstab[symidx] & 0x8000)))
-		  /* It's not the version we want.  */
-		  return NULL;
-	      }
-	  }
-	else
-	  {
-	    /* No specific version is selected.  There are two ways we
-	       can got here:
-
-	       - a binary which does not include versioning information
-	       is loaded
-
-	       - dlsym() instead of dlvsym() is used to get a symbol which
-	       might exist in more than one form
-
-	       If the library does not provide symbol version information
-	       there is no problem at at: we simply use the symbol if it
-	       is defined.
-
-	       These two lookups need to be handled differently if the
-	       library defines versions.  In the case of the old
-	       unversioned application the oldest (default) version
-	       should be used.  In case of a dlsym() call the latest and
-	       public interface should be returned.  */
-	    if (verstab != NULL)
-	      {
-		if ((verstab[symidx] & 0x7fff)
-		    >= ((flags & DL_LOOKUP_RETURN_NEWEST) ? 2 : 3))
-		  {
-		    /* Don't accept hidden symbols.  */
-		    if ((verstab[symidx] & 0x8000) == 0
-			&& num_versions++ == 0)
-		      /* No version so far.  */
-		      versioned_sym = sym;
-
-		    return NULL;
-		  }
-	      }
-	  }
-
-	/* There cannot be another entry for this symbol so stop here.  */
-	return sym;
-      }
-
-      const ElfW(Sym) *sym;
-      const ElfW(Addr) *bitmask = map->l_gnu_bitmask;
-      if (__builtin_expect (bitmask != NULL, 1))
-	{
-	  ElfW(Addr) bitmask_word
-	    = bitmask[(new_hash / __ELF_NATIVE_CLASS)
-		      & map->l_gnu_bitmask_idxbits];
-
-	  unsigned int hashbit1 = new_hash & (__ELF_NATIVE_CLASS - 1);
-	  unsigned int hashbit2 = ((new_hash >> map->l_gnu_shift)
-				   & (__ELF_NATIVE_CLASS - 1));
-
-	  if (__builtin_expect ((bitmask_word >> hashbit1)
-				& (bitmask_word >> hashbit2) & 1, 0))
-	    {
-	      Elf32_Word bucket = map->l_gnu_buckets[new_hash
-						     % map->l_nbuckets];
-	      if (bucket != 0)
-		{
-		  const Elf32_Word *hasharr = &map->l_gnu_chain_zero[bucket];
-
-		  do
-		    if (((*hasharr ^ new_hash) >> 1) == 0)
-		      {
-			symidx = hasharr - map->l_gnu_chain_zero;
-			sym = check_match (&symtab[symidx]);
-			if (sym != NULL)
-			  goto found_it;
-		      }
-		  while ((*hasharr++ & 1u) == 0);
-		}
-	    }
-	  /* No symbol found.  */
-	  symidx = SHN_UNDEF;
-	}
-      else
-	{
-	  if (*old_hash == 0xffffffff)
-	    *old_hash = _dl_elf_hash (undef_name);
-
-	  /* Use the old SysV-style hash table.  Search the appropriate
-	     hash bucket in this object's symbol table for a definition
-	     for the same symbol name.  */
-	  for (symidx = map->l_buckets[*old_hash % map->l_nbuckets];
-	       symidx != STN_UNDEF;
-	       symidx = map->l_chain[symidx])
-	    {
-	      sym = check_match (&symtab[symidx]);
-	      if (sym != NULL)
-		goto found_it;
-	    }
-	}
-
-      /* If we have seen exactly one versioned symbol while we are
-	 looking for an unversioned symbol and the version is not the
-	 default version we still accept this symbol since there are
-	 no possible ambiguities.  */
-      sym = num_versions == 1 ? versioned_sym : NULL;
-
-      if (sym != NULL)
-	{
-	found_it:
-	  switch (__builtin_expect (ELFW(ST_BIND) (sym->st_info), STB_GLOBAL))
-	    {
-	    case STB_WEAK:
-	      /* Weak definition.  Use this value if we don't find another.  */
-	      if (__builtin_expect (GLRO(dl_dynamic_weak), 0))
-		{
-		  if (! result->s)
-		    {
-		      result->s = sym;
-		      result->m = (struct link_map *) map;
-		    }
-		  break;
-		}
-	      /* FALLTHROUGH */
-	    case STB_GLOBAL:
-	    success:
-	      /* Global definition.  Just what we need.  */
-	      result->s = sym;
-	      result->m = (struct link_map *) map;
-	      return 1;
-
-	    case STB_GNU_UNIQUE:;
-	      /* We have to determine whether we already found a
-		 symbol with this name before.  If not then we have to
-		 add it to the search table.  If we already found a
-		 definition we have to use it.  */
-	      void enter (struct unique_sym *table, size_t size,
-			  unsigned int hash, const char *name,
-			  const ElfW(Sym) *sym, const struct link_map *map)
-	      {
-		size_t idx = hash % size;
-		size_t hash2 = 1 + hash % (size - 2);
-		while (1)
-		  {
-		    if (table[idx].hashval == 0)
-		      {
-			table[idx].hashval = hash;
-			table[idx].name = strtab + sym->st_name;
-			if ((type_class & ELF_RTYPE_CLASS_COPY) != 0)
-			  {
-			    table[idx].sym = ref;
-			    table[idx].map = undef_map;
-			  }
-			else
-			  {
-			    table[idx].sym = sym;
-			    table[idx].map = map;
-			  }
-			return;
-		      }
-
-		    idx += hash2;
-		    if (idx >= size)
-		      idx -= size;
-		  }
-	      }
-
-	      struct unique_sym_table *tab
-		= &GL(dl_ns)[map->l_ns]._ns_unique_sym_table;
-
-	      __rtld_lock_lock_recursive (tab->lock);
-
-	      struct unique_sym *entries = tab->entries;
-	      size_t size = tab->size;
-	      if (entries != NULL)
-		{
-		  size_t idx = new_hash % size;
-		  size_t hash2 = 1 + new_hash % (size - 2);
-		  while (1)
-		    {
-		      if (entries[idx].hashval == new_hash
-			  && strcmp (entries[idx].name, undef_name) == 0)
-			{
-			  result->s = entries[idx].sym;
-			  result->m = (struct link_map *) entries[idx].map;
-			  __rtld_lock_unlock_recursive (tab->lock);
-			  return 1;
-			}
-
-		      if (entries[idx].hashval == 0
-			  && entries[idx].name == NULL)
-			break;
-
-		      idx += hash2;
-		      if (idx >= size)
-			idx -= size;
-		    }
-
-		  if (size * 3 <= tab->n_elements)
-		    {
-		      /* Expand the table.  */
-		      size_t newsize = _dl_higher_prime_number (size);
-		      struct unique_sym *newentries
-			= calloc (sizeof (struct unique_sym), newsize);
-		      if (newentries == NULL)
-			{
-			nomem:
-			  __rtld_lock_unlock_recursive (tab->lock);
-			  _dl_fatal_printf ("out of memory\n");
-			}
-
-		      for (idx = 0; idx < size; ++idx)
-			if (entries[idx].hashval != 0)
-			  enter (newentries, newsize, entries[idx].hashval,
-				 entries[idx].name, entries[idx].sym,
-				 entries[idx].map);
-
-		      tab->free (entries);
-		      tab->size = newsize;
-		      entries = tab->entries = newentries;
-		      tab->free = free;
-		    }
-		}
-	      else
-		{
-#define INITIAL_NUNIQUE_SYM_TABLE 31
-		  size = INITIAL_NUNIQUE_SYM_TABLE;
-		  entries = calloc (sizeof (struct unique_sym), size);
-		  if (entries == NULL)
-		    goto nomem;
-
-		  tab->entries = entries;
-		  tab->size = size;
-		  tab->free = free;
-		}
-
-	      enter (entries, size, new_hash, strtab + sym->st_name, sym, map);
-	      ++tab->n_elements;
-
-	      __rtld_lock_unlock_recursive (tab->lock);
-
-	      goto success;
-
-	    default:
-	      /* Local symbols are ignored.  */
-	      break;
-	    }
-	}
-
-      /* If this current map is the one mentioned in the verneed entry
-	 and we have not found a weak entry, it is a bug.  */
-      if (symidx == STN_UNDEF && version != NULL && version->filename != NULL
-	  && __builtin_expect (_dl_name_match_p (version->filename, map), 0))
-	return -1;
-    }
-  while (++i < n);
-
-  /* We have not found anything until now.  */
-  return 0;
-}