i386: Remove lazy tlsdesc relocation related code

Like in commit e75711ebfa976d5468ec292282566a18b07e4d67 for x86_64,
remove unused lazy tlsdesc relocation processing code:

  _dl_tlsdesc_resolve_abs_plus_addend
  _dl_tlsdesc_resolve_rel
  _dl_tlsdesc_resolve_rela
  _dl_tlsdesc_resolve_hold

1 files changed, 1 insertions, 230 deletions

diff --git a/sysdeps/i386/tlsdesc.c b/sysdeps/i386/tlsdesc.c
index 0bc646541f..436a21f66b 100644
--- a/sysdeps/i386/tlsdesc.c
+++ b/sysdeps/i386/tlsdesc.c
@@ -16,242 +16,13 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
-#include <link.h>
 #include <ldsodefs.h>
-#include <elf/dynamic-link.h>
 #include <tls.h>
 #include <dl-tlsdesc.h>
 #include <dl-unmap-segments.h>
+#define _dl_tlsdesc_resolve_hold 0
 #include <tlsdeschtab.h>
 
-/* The following 4 functions take an entry_check_offset argument.
-   It's computed by the caller as an offset between its entry point
-   and the call site, such that by adding the built-in return address
-   that is implicitly passed to the function with this offset, we can
-   easily obtain the caller's entry point to compare with the entry
-   point given in the TLS descriptor.  If it's changed, we want to
-   return immediately.  */
-
-/* This function is used to lazily resolve TLS_DESC REL relocations
-   that reference the *ABS* segment in their own link maps.  The
-   argument is the addend originally stored there.  */
-
-void
-__attribute__ ((regparm (3))) attribute_hidden
-_dl_tlsdesc_resolve_abs_plus_addend_fixup (struct tlsdesc volatile *td,
-					   struct link_map *l,
-					   ptrdiff_t entry_check_offset)
-{
-  ptrdiff_t addend = (ptrdiff_t) td->arg;
-
-  if (_dl_tlsdesc_resolve_early_return_p (td, __builtin_return_address (0)
-					  - entry_check_offset))
-    return;
-
-#ifndef SHARED
-  CHECK_STATIC_TLS (l, l);
-#else
-  if (!TRY_STATIC_TLS (l, l))
-    {
-      td->arg = _dl_make_tlsdesc_dynamic (l, addend);
-      td->entry = _dl_tlsdesc_dynamic;
-    }
-  else
-#endif
-    {
-      td->arg = (void*) (addend - l->l_tls_offset);
-      td->entry = _dl_tlsdesc_return;
-    }
-
-  _dl_tlsdesc_wake_up_held_fixups ();
-}
-
-/* This function is used to lazily resolve TLS_DESC REL relocations
-   that originally had zero addends.  The argument location, that
-   originally held the addend, is used to hold a pointer to the
-   relocation, but it has to be restored before we call the function
-   that applies relocations.  */
-
-void
-__attribute__ ((regparm (3))) attribute_hidden
-_dl_tlsdesc_resolve_rel_fixup (struct tlsdesc volatile *td,
-			       struct link_map *l,
-			       ptrdiff_t entry_check_offset)
-{
-  const ElfW(Rel) *reloc = td->arg;
-
-  if (_dl_tlsdesc_resolve_early_return_p (td, __builtin_return_address (0)
-					  - entry_check_offset))
-    return;
-
-  /* The code below was borrowed from _dl_fixup(),
-     except for checking for STB_LOCAL.  */
-  const ElfW(Sym) *const symtab
-    = (const void *) D_PTR (l, l_info[DT_SYMTAB]);
-  const char *strtab = (const void *) D_PTR (l, l_info[DT_STRTAB]);
-  const ElfW(Sym) *sym = &symtab[ELFW(R_SYM) (reloc->r_info)];
-  lookup_t result;
-
-   /* Look up the target symbol.  If the normal lookup rules are not
-      used don't look in the global scope.  */
-  if (ELFW(ST_BIND) (sym->st_info) != STB_LOCAL
-      && __builtin_expect (ELFW(ST_VISIBILITY) (sym->st_other), 0) == 0)
-    {
-      const struct r_found_version *version = NULL;
-
-      if (l->l_info[VERSYMIDX (DT_VERSYM)] != NULL)
-	{
-	  const ElfW(Half) *vernum =
-	    (const void *) D_PTR (l, l_info[VERSYMIDX (DT_VERSYM)]);
-	  ElfW(Half) ndx = vernum[ELFW(R_SYM) (reloc->r_info)] & 0x7fff;
-	  version = &l->l_versions[ndx];
-	  if (version->hash == 0)
-	    version = NULL;
-	}
-
-      result = _dl_lookup_symbol_x (strtab + sym->st_name, l, &sym,
-				    l->l_scope, version, ELF_RTYPE_CLASS_PLT,
-				    DL_LOOKUP_ADD_DEPENDENCY, NULL);
-    }
-  else
-    {
-      /* We already found the symbol.  The module (and therefore its load
-	 address) is also known.  */
-      result = l;
-    }
-
-  if (!sym)
-    {
-      td->arg = 0;
-      td->entry = _dl_tlsdesc_undefweak;
-    }
-  else
-    {
-#  ifndef SHARED
-      CHECK_STATIC_TLS (l, result);
-#  else
-      if (!TRY_STATIC_TLS (l, result))
-	{
-	  td->arg = _dl_make_tlsdesc_dynamic (result, sym->st_value);
-	  td->entry = _dl_tlsdesc_dynamic;
-	}
-      else
-#  endif
-	{
-	  td->arg = (void*)(sym->st_value - result->l_tls_offset);
-	  td->entry = _dl_tlsdesc_return;
-	}
-    }
-
-  _dl_tlsdesc_wake_up_held_fixups ();
-}
-
-/* This function is used to lazily resolve TLS_DESC RELA relocations.
-   The argument location is used to hold a pointer to the relocation.  */
-
-void
-__attribute__ ((regparm (3))) attribute_hidden
-_dl_tlsdesc_resolve_rela_fixup (struct tlsdesc volatile *td,
-				struct link_map *l,
-				ptrdiff_t entry_check_offset)
-{
-  const ElfW(Rela) *reloc = td->arg;
-
-  if (_dl_tlsdesc_resolve_early_return_p (td, __builtin_return_address (0)
-					  - entry_check_offset))
-    return;
-
-  /* The code below was borrowed from _dl_fixup(),
-     except for checking for STB_LOCAL.  */
-  const ElfW(Sym) *const symtab
-    = (const void *) D_PTR (l, l_info[DT_SYMTAB]);
-  const char *strtab = (const void *) D_PTR (l, l_info[DT_STRTAB]);
-  const ElfW(Sym) *sym = &symtab[ELFW(R_SYM) (reloc->r_info)];
-  lookup_t result;
-
-   /* Look up the target symbol.  If the normal lookup rules are not
-      used don't look in the global scope.  */
-  if (ELFW(ST_BIND) (sym->st_info) != STB_LOCAL
-      && __builtin_expect (ELFW(ST_VISIBILITY) (sym->st_other), 0) == 0)
-    {
-      const struct r_found_version *version = NULL;
-
-      if (l->l_info[VERSYMIDX (DT_VERSYM)] != NULL)
-	{
-	  const ElfW(Half) *vernum =
-	    (const void *) D_PTR (l, l_info[VERSYMIDX (DT_VERSYM)]);
-	  ElfW(Half) ndx = vernum[ELFW(R_SYM) (reloc->r_info)] & 0x7fff;
-	  version = &l->l_versions[ndx];
-	  if (version->hash == 0)
-	    version = NULL;
-	}
-
-      result = _dl_lookup_symbol_x (strtab + sym->st_name, l, &sym,
-				    l->l_scope, version, ELF_RTYPE_CLASS_PLT,
-				    DL_LOOKUP_ADD_DEPENDENCY, NULL);
-    }
-  else
-    {
-      /* We already found the symbol.  The module (and therefore its load
-	 address) is also known.  */
-      result = l;
-    }
-
-  if (!sym)
-    {
-      td->arg = (void*) reloc->r_addend;
-      td->entry = _dl_tlsdesc_undefweak;
-    }
-  else
-    {
-#  ifndef SHARED
-      CHECK_STATIC_TLS (l, result);
-#  else
-      if (!TRY_STATIC_TLS (l, result))
-	{
-	  td->arg = _dl_make_tlsdesc_dynamic (result, sym->st_value
-					      + reloc->r_addend);
-	  td->entry = _dl_tlsdesc_dynamic;
-	}
-      else
-#  endif
-	{
-	  td->arg = (void*) (sym->st_value - result->l_tls_offset
-			     + reloc->r_addend);
-	  td->entry = _dl_tlsdesc_return;
-	}
-    }
-
-  _dl_tlsdesc_wake_up_held_fixups ();
-}
-
-/* This function is used to avoid busy waiting for other threads to
-   complete the lazy relocation.  Once another thread wins the race to
-   relocate a TLS descriptor, it sets the descriptor up such that this
-   function is called to wait until the resolver releases the
-   lock.  */
-
-void
-__attribute__ ((regparm (3))) attribute_hidden
-_dl_tlsdesc_resolve_hold_fixup (struct tlsdesc volatile *td,
-				struct link_map *l __attribute__((__unused__)),
-				ptrdiff_t entry_check_offset)
-{
-  /* Maybe we're lucky and can return early.  */
-  if (__builtin_return_address (0) - entry_check_offset != td->entry)
-    return;
-
-  /* Locking here will stop execution until the running resolver runs
-     _dl_tlsdesc_wake_up_held_fixups(), releasing the lock.
-
-     FIXME: We'd be better off waiting on a condition variable, such
-     that we didn't have to hold the lock throughout the relocation
-     processing.  */
-  __rtld_lock_lock_recursive (GL(dl_load_lock));
-  __rtld_lock_unlock_recursive (GL(dl_load_lock));
-}
-
-
 /* Unmap the dynamic object, but also release its TLS descriptor table
    if there is one.  */