* sysdeps/generic/ldsodefs.h (struct rtld_global_ro): Define

	_dl_sysinfo_dso under [NEED_DL_SYSINFO_DSO] as well.
	* elf/rtld.c (dl_main): Set up GLRO(dl_sysinfo_dso) under
	[NEED_DL_SYSINFO_DSO] as well.
	* sysdeps/generic/dl-sysdep.c (_dl_show_auxv): Always include
	AT_SYSINFO and AT_SYSINFO_EHDR in name table.
	(_dl_sysdep_start) [NEED_DL_SYSINFO_DSO]: Match AT_SYSINFO_EHDR.
	* elf/dl-support.c (_dl_sysinfo_dso): Define also under
	[NEED_DL_SYSINFO_DSO].
	(_dl_aux_init) [NEED_DL_SYSINFO || NEED_DL_SYSINFO_DSO]:
	Match AT_SYSINFO_EHDR and set GL(dl_sysinfo_dso).

2004-11-05  Roland McGrath  <roland@redhat.com>

ChangeLog

@@ -1,3 +1,17 @@
+2004-11-05  Roland McGrath  <roland@redhat.com>
+
+	* sysdeps/generic/ldsodefs.h (struct rtld_global_ro): Define
+	_dl_sysinfo_dso under [NEED_DL_SYSINFO_DSO] as well.
+	* elf/rtld.c (dl_main): Set up GLRO(dl_sysinfo_dso) under
+	[NEED_DL_SYSINFO_DSO] as well.
+	* sysdeps/generic/dl-sysdep.c (_dl_show_auxv): Always include
+	AT_SYSINFO and AT_SYSINFO_EHDR in name table.
+	(_dl_sysdep_start) [NEED_DL_SYSINFO_DSO]: Match AT_SYSINFO_EHDR.
+	* elf/dl-support.c (_dl_sysinfo_dso): Define also under
+	[NEED_DL_SYSINFO_DSO].
+	(_dl_aux_init) [NEED_DL_SYSINFO || NEED_DL_SYSINFO_DSO]:
+	Match AT_SYSINFO_EHDR and set GL(dl_sysinfo_dso).
+
 2004-11-05  Roland McGrath  <roland@redhat.com>
 
 	* manual/errno.texi (Error Codes): Revert last change for now.

elf/dl-support.c

@@ -136,6 +136,8 @@ int (*_dl_make_stack_executable_hook) (void **) internal_function
 #ifdef NEED_DL_SYSINFO
 /* Needed for improved syscall handling on at least x86/Linux.  */
 uintptr_t _dl_sysinfo = DL_SYSINFO_DEFAULT;
+#endif
+#if defined NEED_DL_SYSINFO || defined NEED_DL_SYSINFO_DSO
 /* Address of the ELF headers in the vsyscall page.  */
 const ElfW(Ehdr) *_dl_sysinfo_dso;
 #endif
@@ -183,6 +185,11 @@ _dl_aux_init (ElfW(auxv_t) *av)
       case AT_SYSINFO:
 	GL(dl_sysinfo) = av->a_un.a_val;
 	break;
+#endif
+#if defined NEED_DL_SYSINFO || defined NEED_DL_SYSINFO_DSO
+      case AT_SYSINFO_EHDR:
+	GL(dl_sysinfo_dso) = av->a_un.a_ptr;
+	break;
 #endif
       case AT_UID:
 	uid ^= av->a_un.a_val;

elf/rtld.c

@@ -1274,7 +1274,7 @@ ERROR: ld.so: object '%s' from %s cannot be preloaded: ignored.\n",
       assert (i == npreloads);
     }
 
-#ifdef NEED_DL_SYSINFO
+#if defined NEED_DL_SYSINFO || defined NEED_DL_SYSINFO_DSO
   struct link_map *sysinfo_map = NULL;
   if (GLRO(dl_sysinfo_dso) != NULL)
     {
@@ -1338,9 +1338,11 @@ ERROR: ld.so: object '%s' from %s cannot be preloaded: ignored.\n",
 	    }
 
 	  /* We have a prelinked DSO preloaded by the system.  */
+	  sysinfo_map = l;
+# ifdef NEED_DL_SYSINFO
 	  if (GLRO(dl_sysinfo) == DL_SYSINFO_DEFAULT)
 	    GLRO(dl_sysinfo) = GLRO(dl_sysinfo_dso)->e_entry + l->l_addr;
-	  sysinfo_map = l;
+# endif
 	}
     }
 #endif
@@ -1389,7 +1391,7 @@ ERROR: ld.so: object '%s' from %s cannot be preloaded: ignored.\n",
 	  GL(dl_rtld_map).l_next = (i + 1 < main_map->l_searchlist.r_nlist
 				    ? main_map->l_searchlist.r_list[i + 1]
 				    : NULL);
-#ifdef NEED_DL_SYSINFO
+#if defined NEED_DL_SYSINFO || defined NEED_DL_SYSINFO_DSO
 	  if (sysinfo_map != NULL
 	      && GL(dl_rtld_map).l_prev->l_next == sysinfo_map
 	      && GL(dl_rtld_map).l_next != sysinfo_map)

sysdeps/generic/dl-sysdep.c

@@ -161,6 +161,8 @@ _dl_sysdep_start (void **start_argptr,
       case AT_SYSINFO:
 	new_sysinfo = av->a_un.a_val;
 	break;
+#endif
+#if defined NEED_DL_SYSINFO || defined NEED_DL_SYSINFO_DSO
       case AT_SYSINFO_EHDR:
 	GLRO(dl_sysinfo_dso) = av->a_un.a_ptr;
 	break;
@@ -287,10 +289,8 @@ _dl_show_auxv (void)
 	  [AT_UCACHEBSIZE - 2] =	{ "AT_UCACHEBSIZE:  0x", hex },
 	  [AT_IGNOREPPC - 2] =		{ "AT_IGNOREPPC", ignore },
 	  [AT_SECURE - 2] =		{ "AT_SECURE:       ", dec },
-#ifdef NEED_DL_SYSINFO
 	  [AT_SYSINFO - 2] =		{ "AT_SYSINFO:      0x", hex },
 	  [AT_SYSINFO_EHDR - 2] =	{ "AT_SYSINFO_EHDR: 0x", hex },
-#endif
 	};
       unsigned int idx = (unsigned int) (av->a_type - 2);
 

sysdeps/generic/ldsodefs.h

@@ -470,7 +470,9 @@ struct rtld_global_ro
 #ifdef NEED_DL_SYSINFO
   /* Syscall handling improvements.  This is very specific to x86.  */
   EXTERN uintptr_t _dl_sysinfo;
+#endif
 
+#if defined NEED_DL_SYSINFO || defined NEED_DL_SYSINFO_DSO
   /* The vsyscall page is a virtual DSO pre-mapped by the kernel.
      This points to its ELF header.  */
   EXTERN const ElfW(Ehdr) *_dl_sysinfo_dso;