Update.

2001-12-11  Jakub Jelinek  <jakub@redhat.com>

	* elf/Makefile (dl-routines): Add conflict.
	(rtld-ldscript-in, rtld-ldscript, rtld-parms): Remove.
	(ld.so): Add _begin local symbol.
	* elf/elf.h (DT_VALTAGIDX, DT_VALNUM, DT_ADDRTAGIDX, DT_ADDRNUM):
	Define.
	* elf/dl-deps.c (_dl_build_local_scope): New.
	(_dl_map_object_deps): If LD_TRACE_PRELINKING, compute local scopes
	of all libraries.
	* elf/do-rel.h (VALIDX): Define.
	(elf_dynamic_do_rel): If ELF_MACHINE_PLT_REL is defined, don't do
	lazy binding for RELA.  If DT_GNU_PRELINKED, DT_RELACOUNT relocations
	can be skipped.
	* elf/dl-conflict.c: New file.
	* elf/dl-lookup.c (_dl_debug_bindings): New.
	(_dl_lookup_symbol): Use _dl_debug_bindings.  Reference_name is always
	non-NULL.
	(_dl_lookup_symbol_skip): Likewise.
	(_dl_lookup_versioned_symbol): Likewise.
	(_dl_lookup_versioned_symbol_skip): Likewise.
	* elf/dl-runtime.c (PLTREL): If ELF_MACHINE_PLT_REL is defined,
	define to ElfW(Rel).
	* elf/dynamic-link.h (elf_get_dynamic_info): Record selected dynamic
	tags in the DT_VALRNGLO..DT_VALRNGHI and DT_ADDRRNGLO..DT_ADDRRNGHI
	ranges.
	Don't adjust address dynamic tags if l_addr is 0.
	* elf/rtld.c (_dl_trace_prelink, _dl_trace_prelink_map): New variables.
	(_dl_start): Skip ELF_DYNAMIC_RELOCATE if ld.so is prelinked.
	(VALIDX, ADDRIDX): Define.
	(_dl_start_final): Initialize _dl_rtld_map's l_map_start and l_map_end.
	(dl_main): Print library list for LD_TRACE_PRELINKING.
	If prelinking information can be used, skip relocating libraries and
	call _dl_resolve_conflicts instead.
	(process_envvars): Handle LD_TRACE_PRELINKING envvar.
	* elf/dl-load.c (_dl_map_object): Don't create fake libs
	if LD_TRACE_PRELINKING.
	* include/link.h (struct link_map) [l_info]: Add DT_VALNUM
	+ DT_ADDRNUM.
	* sysdeps/generic/ldsodefs.h (_dl_trace_prelink_map): New declaration.
	(DL_DEBUG_PRELINK): Define.
	(_dl_resolve_conflicts): Add prototype.

	* sysdeps/alpha/dl-machine.h (elf_machine_runtime_setup): Reinitialize
	.plt for prelinked libraries where prelinking info cannot be used.
	(elf_machine_rela): If relocating R_ALPHA_JMP_SLOT in .gnu.conflict
	section, use RESOLVE_CONFLICT_FIND_MAP to find out reloc's link_map.
	* sysdeps/arm/bits/link.h: New file.
	* sysdeps/arm/dl-machine.h (elf_machine_runtime_setup): Save original
	content of .got[1].
	(ELF_MACHINE_NO_RELA): Only define if RTLD_BOOTSTRAP.
	(ELF_MACHINE_PLT_REL): Define.
	(elf_machine_rela, elf_machine_rela_relative): New.
	(elf_machine_lazy_rel): Reinitialize R_ARM_JUMP_SLOT address instead
	of adjusting it if prelinked and prelinking cannot be used.
	* sysdeps/i386/bits/link.h: New file.
	* sysdeps/i386/dl-machine.h (elf_machine_runtime_setup): Save original
	content of .got[1].
	(ELF_MACHINE_NO_RELA): Only define if RTLD_BOOTSTRAP.
	(ELF_MACHINE_PLT_REL): Define.
	(elf_machine_rela, elf_machine_rela_relative): New.
	(elf_machine_lazy_rel): Reinitialize R_386_JUMP_SLOT address instead
	of adjusting it if prelinked and prelinking cannot be used.
	* sysdeps/powerpc/dl-machine.h (elf_machine_rela): If relocating
	conflicts, skip finaladdr computation.  Use RESOLVE_CONFLICT_FIND_MAP
	to find out map for R_PPC_JMP_SLOT relocs.
	* sysdeps/sparc/sparc32/dl-machine.h (VALIDX): Define.
	(OPCODE_BA): Define.
	(elf_machine_runtime_setup): Reinitialize .plt for prelinked
	libraries where prelinking info cannot be used.
	(sparc_fixup_plt): Renamed from elf_machine_fixup_plt.
	(elf_machine_fixup_plt): Call sparc_fixup_plt.
	(elf_machine_rela): Set value to 0 if relocating conflicts.
	Call sparc_fixup_plt for R_SPARC_JMP_SLOT.
	* sysdeps/sparc/sparc64/dl-machine.h (VALIDX): Define.
	(sparc64_fixup_plt): Fix a typo.
	(elf_machine_rela): Set value to 0 if relocating conflicts.
	Handle R_SPARC_JMP_SLOT relocs when relocating conflicts.
	(elf_machine_runtime_setup): Reinitialize .plt for prelinked
	libraries where prelinking info cannot be used.
	* sysdeps/sh/bits/link.h: New file.
	* sysdeps/sh/dl-machine.h (elf_machine_runtime_setup): Save original
	content of .got[1].
	(elf_machine_lazy_rel): Reinitialize R_SH_JMP_SLOT address instead
	of adjusting it if prelinked and prelinking cannot be used.
	* sysdeps/s390/s390-32/bits/link.h: New file.
	* sysdeps/s390/s390-32/dl-machine.h (elf_machine_runtime_setup):
	Save original content of .got[1].
	(elf_machine_lazy_rel): Reinitialize R_390_JMP_SLOT address instead
	of adjusting it if prelinked and prelinking cannot be used.
	* sysdeps/s390/s390-64/bits/link.h: New file.
	* sysdeps/s390/s390-64/dl-machine.h (elf_machine_runtime_setup):
	Save original content of .got[1].
	(elf_machine_lazy_rel): Reinitialize R_390_JMP_SLOT address instead
	of adjusting it if prelinked and prelinking cannot be used.
	* sysdeps/x86_64/bits/link.h: New file.
	* sysdeps/x86_64/dl-machine.h (elf_machine_runtime_setup):
	Save original content of .got[1].
	(elf_machine_lazy_rel): Reinitialize R_X86_64_JMP_SLOT address instead
	of adjusting it if prelinked and prelinking cannot be used.

1 files changed, 61 insertions, 0 deletions

diff --git a/elf/dl-deps.c b/elf/dl-deps.c
index ec61326..af39de1 100644
--- a/elf/dl-deps.c
+++ b/elf/dl-deps.c
@@ -21,6 +21,7 @@
 #include <dlfcn.h>
 #include <errno.h>
 #include <libintl.h>
+#include <stddef.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
@@ -70,6 +71,21 @@ openaux (void *a)
 			      args->trace_mode, 0);
 }
 
+static ptrdiff_t
+internal_function
+_dl_build_local_scope (struct link_map **list, struct link_map *map)
+{
+  struct link_map **p = list;
+  struct link_map **q;
+
+  *p++ = map;
+  map->l_reserved = 1;
+  if (map->l_initfini)
+    for (q = map->l_initfini + 1; *q; ++q)
+      if (! (*q)->l_reserved)
+	p += _dl_build_local_scope (p, *q);
+  return p - list;
+}
 
 
 /* We use a very special kind of list to track the path
@@ -491,6 +507,51 @@ _dl_map_object_deps (struct link_map *map,
       runp->map->l_reserved = 0;
     }
 
+  if (__builtin_expect(_dl_debug_mask & DL_DEBUG_PRELINK, 0) != 0
+      && map == _dl_loaded)
+    {
+      /* If we are to compute conflicts, we have to build local scope
+	 for each library, not just the ultimate loader.  */
+      for (i = 0; i < nlist; ++i)
+	{
+	  struct link_map *l = map->l_searchlist.r_list[i];
+	  unsigned int j, cnt;
+
+	  /* The local scope has been already computed.  */
+	  if (l == map
+	      || (l->l_local_scope[0]
+		  && l->l_local_scope[0]->r_nlist) != 0)
+	    continue;
+
+	  if (l->l_info[AUXTAG] || l->l_info[FILTERTAG])
+	    {
+	      /* As current DT_AUXILIARY/DT_FILTER implementation needs to be
+		 rewritten, no need to bother with prelinking the old
+		 implementation.  */
+	      _dl_signal_error (EINVAL, l->l_name, NULL, N_("\
+Filters not supported with LD_TRACE_PRELINKING"));
+	    }
+
+	  cnt = _dl_build_local_scope (map->l_initfini, l);
+	  assert (cnt <= nlist);
+	  for (j = 0; j < cnt; j++)
+	    map->l_initfini[j]->l_reserved = 0;
+
+	  l->l_local_scope[0] =
+	    (struct r_scope_elem *) malloc (sizeof (struct r_scope_elem)
+					    + (cnt
+					       * sizeof (struct link_map *)));
+	  if (l->l_local_scope[0] == NULL)
+	    _dl_signal_error (ENOMEM, map->l_name, NULL,
+			      N_("cannot allocate symbol search list"));
+	  l->l_local_scope[0]->r_nlist = cnt;
+	  l->l_local_scope[0]->r_list =
+	    (struct link_map **) (l->l_local_scope[0] + 1);
+	  memcpy (l->l_local_scope[0]->r_list, map->l_initfini,
+		  cnt * sizeof (struct link_map *));
+	}
+    }
+
   /* Maybe we can remove some relocation dependencies now.  */
   assert (map->l_searchlist.r_list[0] == map);
   for (i = 0; i < map->l_reldepsact; ++i)