Don't use INTDEF/INTUSE with _dl_argv (bug 14132).

Continuing the removal of the obsolete INTDEF / INTUSE mechanism, this
patch replaces its use for _dl_argv with rtld_hidden_data_def and
rtld_hidden_proto.  Some places in .S files that previously used
_dl_argv_internal or INTUSE(_dl_argv) now use __GI__dl_argv directly
(there are plenty of existing examples of such direct use of __GI_*).

A single place in rtld.c previously used _dl_argv without INTUSE,
apparently accidentally, while the rtld_hidden_proto mechanism avoids
such accidential omissions.  As a consequence, this patch *does*
change the contents of stripped ld.so.  However, the installed
stripped shared libraries are identical to those you get if instead of
this patch you change that single _dl_argv use to use INTUSE, without
any other changes.

Tested for x86_64 (testsuite as well as comparison of installed
stripped shared libraries as described above).

	[BZ #14132]
	* sysdeps/generic/ldsodefs.h (_dl_argv): Use rtld_hidden_proto.
	[IS_IN_rtld] (_dl_argv_internal): Do not declare.
	(rtld_progname): Make macro definition unconditional.
	* elf/rtld.c (_dl_argv): Use rtld_hidden_data_def instead of
	INTDEF.
	(dlmopen_doit): Do not use INTUSE with _dl_argv.
	(dl_main): Likewise.
	* elf/dl-sysdep.c (_dl_sysdep_start): Likewise.
	* sysdeps/alpha/dl-machine.h (RTLD_START): Use __GI__dl_argv
	instead of _dl_argv_internal.
	* sysdeps/powerpc/powerpc32/dl-start.S (_dl_start_user): Use
	__GI__dl_argv instead of INTUSE(_dl_argv).
	* sysdeps/powerpc/powerpc64/dl-machine.h (RTLD_START): Use
	__GI__dl_argv instead of _dl_argv_internal.

ChangeLog

@@ -1,5 +1,21 @@
 2014-11-04  Joseph Myers  <joseph@codesourcery.com>
 
+	[BZ #14132]
+	* sysdeps/generic/ldsodefs.h (_dl_argv): Use rtld_hidden_proto.
+	[IS_IN_rtld] (_dl_argv_internal): Do not declare.
+	(rtld_progname): Make macro definition unconditional.
+	* elf/rtld.c (_dl_argv): Use rtld_hidden_data_def instead of
+	INTDEF.
+	(dlmopen_doit): Do not use INTUSE with _dl_argv.
+	(dl_main): Likewise.
+	* elf/dl-sysdep.c (_dl_sysdep_start): Likewise.
+	* sysdeps/alpha/dl-machine.h (RTLD_START): Use __GI__dl_argv
+	instead of _dl_argv_internal.
+	* sysdeps/powerpc/powerpc32/dl-start.S (_dl_start_user): Use
+	__GI__dl_argv instead of INTUSE(_dl_argv).
+	* sysdeps/powerpc/powerpc64/dl-machine.h (RTLD_START): Use
+	__GI__dl_argv instead of _dl_argv_internal.
+
 	* soft-fp/op-common.h (_FP_TO_INT_ROUND): New macro.
 	* soft-fp/double.h [_FP_W_TYPE_SIZE < 64] (FP_TO_INT_ROUND_D): New
 	macro.

elf/dl-sysdep.c

@@ -108,7 +108,7 @@ _dl_sysdep_start (void **start_argptr,
 #endif
 
   __libc_stack_end = DL_STACK_END (start_argptr);
-  DL_FIND_ARG_COMPONENTS (start_argptr, _dl_argc, INTUSE(_dl_argv), _environ,
+  DL_FIND_ARG_COMPONENTS (start_argptr, _dl_argc, _dl_argv, _environ,
 			  GLRO(dl_auxv));
 
   user_entry = (ElfW(Addr)) ENTRY_POINT;

elf/rtld.c

@@ -83,7 +83,7 @@ int _dl_argc attribute_relro attribute_hidden;
 char **_dl_argv attribute_relro = NULL;
 unsigned int _dl_skip_args attribute_relro attribute_hidden;
 #endif
-INTDEF(_dl_argv)
+rtld_hidden_data_def (_dl_argv)
 
 #ifndef THREAD_SET_STACK_GUARD
 /* Only exported for architectures that don't store the stack guard canary
@@ -492,7 +492,7 @@ dlmopen_doit (void *a)
   args->map = _dl_open (args->fname,
 			(RTLD_LAZY | __RTLD_DLOPEN | __RTLD_AUDIT
 			 | __RTLD_SECURE),
-			dl_main, LM_ID_NEWLM, _dl_argc, INTUSE(_dl_argv),
+			dl_main, LM_ID_NEWLM, _dl_argc, _dl_argv,
 			__environ);
 }
 
@@ -804,55 +804,55 @@ dl_main (const ElfW(Phdr) *phdr,
       GL(dl_rtld_map).l_name = rtld_progname;
 
       while (_dl_argc > 1)
-	if (! strcmp (INTUSE(_dl_argv)[1], "--list"))
+	if (! strcmp (_dl_argv[1], "--list"))
 	  {
 	    mode = list;
 	    GLRO(dl_lazy) = -1;	/* This means do no dependency analysis.  */
 
 	    ++_dl_skip_args;
 	    --_dl_argc;
-	    ++INTUSE(_dl_argv);
+	    ++_dl_argv;
 	  }
-	else if (! strcmp (INTUSE(_dl_argv)[1], "--verify"))
+	else if (! strcmp (_dl_argv[1], "--verify"))
 	  {
 	    mode = verify;
 
 	    ++_dl_skip_args;
 	    --_dl_argc;
-	    ++INTUSE(_dl_argv);
+	    ++_dl_argv;
 	  }
-	else if (! strcmp (INTUSE(_dl_argv)[1], "--inhibit-cache"))
+	else if (! strcmp (_dl_argv[1], "--inhibit-cache"))
 	  {
 	    GLRO(dl_inhibit_cache) = 1;
 	    ++_dl_skip_args;
 	    --_dl_argc;
-	    ++INTUSE(_dl_argv);
+	    ++_dl_argv;
 	  }
-	else if (! strcmp (INTUSE(_dl_argv)[1], "--library-path")
+	else if (! strcmp (_dl_argv[1], "--library-path")
 		 && _dl_argc > 2)
 	  {
-	    library_path = INTUSE(_dl_argv)[2];
+	    library_path = _dl_argv[2];
 
 	    _dl_skip_args += 2;
 	    _dl_argc -= 2;
-	    INTUSE(_dl_argv) += 2;
+	    _dl_argv += 2;
 	  }
-	else if (! strcmp (INTUSE(_dl_argv)[1], "--inhibit-rpath")
+	else if (! strcmp (_dl_argv[1], "--inhibit-rpath")
 		 && _dl_argc > 2)
 	  {
-	    GLRO(dl_inhibit_rpath) = INTUSE(_dl_argv)[2];
+	    GLRO(dl_inhibit_rpath) = _dl_argv[2];
 
 	    _dl_skip_args += 2;
 	    _dl_argc -= 2;
-	    INTUSE(_dl_argv) += 2;
+	    _dl_argv += 2;
 	  }
-	else if (! strcmp (INTUSE(_dl_argv)[1], "--audit") && _dl_argc > 2)
+	else if (! strcmp (_dl_argv[1], "--audit") && _dl_argc > 2)
 	  {
-	    process_dl_audit (INTUSE(_dl_argv)[2]);
+	    process_dl_audit (_dl_argv[2]);
 
 	    _dl_skip_args += 2;
 	    _dl_argc -= 2;
-	    INTUSE(_dl_argv) += 2;
+	    _dl_argv += 2;
 	  }
 	else
 	  break;
@@ -886,7 +886,7 @@ of this helper program; chances are you did not intend to run this program.\n\
 
       ++_dl_skip_args;
       --_dl_argc;
-      ++INTUSE(_dl_argv);
+      ++_dl_argv;
 
       /* The initialization of _dl_stack_flags done below assumes the
 	 executable's PT_GNU_STACK may have been honored by the kernel, and
@@ -1800,15 +1800,15 @@ ERROR: ld.so: object '%s' cannot be loaded as audit interface: %s; ignored.\n",
 	    ElfW(Addr) loadbase;
 	    lookup_t result;
 
-	    result = _dl_lookup_symbol_x (INTUSE(_dl_argv)[i], main_map,
+	    result = _dl_lookup_symbol_x (_dl_argv[i], main_map,
 					  &ref, main_map->l_scope,
 					  NULL, ELF_RTYPE_CLASS_PLT,
 					  DL_LOOKUP_ADD_DEPENDENCY, NULL);
 
 	    loadbase = LOOKUP_VALUE_ADDRESS (result);
 
 	    _dl_printf ("%s found at 0x%0*Zd in object at 0x%0*Zd\n",
-			INTUSE(_dl_argv)[i],
+			_dl_argv[i],
 			(int) sizeof ref->st_value * 2,
 			(size_t) ref->st_value,
 			(int) sizeof loadbase * 2, (size_t) loadbase);

sysdeps/alpha/dl-machine.h

@@ -184,16 +184,16 @@ _dl_start_user:							\n\
 	/* Adjust the stack pointer to skip _dl_skip_args words.\n\
 	   This involves copying everything down, since the	\n\
 	   stack pointer must always be 16-byte aligned.  */	\n\
-	ldah	$7, _dl_argv_internal($gp) !gprelhigh		\n\
+	ldah	$7, __GI__dl_argv($gp) !gprelhigh		\n\
 	ldq	$2, 0($sp)					\n\
-	ldq	$5, _dl_argv_internal($7) !gprellow		\n\
+	ldq	$5, __GI__dl_argv($7) !gprellow			\n\
 	subq	$31, $1, $6					\n\
 	subq	$2, $1, $2					\n\
 	s8addq	$6, $5, $5					\n\
 	mov	$sp, $4						\n\
 	s8addq	$1, $sp, $3					\n\
 	stq	$2, 0($sp)					\n\
-	stq	$5, _dl_argv_internal($7) !gprellow		\n\
+	stq	$5, __GI__dl_argv($7) !gprellow			\n\
 	/* Copy down argv.  */					\n\
 0:	ldq	$5, 8($3)					\n\
 	addq	$4, 8, $4					\n\

sysdeps/generic/ldsodefs.h

@@ -641,6 +641,7 @@ extern char **_dl_argv
      attribute_relro
 #endif
      ;
+rtld_hidden_proto (_dl_argv)
 #ifdef IS_IN_rtld
 extern unsigned int _dl_skip_args attribute_hidden
 # ifndef DL_ARGV_NOT_RELRO
@@ -652,15 +653,8 @@ extern unsigned int _dl_skip_args_internal attribute_hidden
      attribute_relro
 # endif
      ;
-extern char **_dl_argv_internal attribute_hidden
-# ifndef DL_ARGV_NOT_RELRO
-     attribute_relro
-# endif
-     ;
-# define rtld_progname (INTUSE(_dl_argv)[0])
-#else
-# define rtld_progname _dl_argv[0]
 #endif
+#define rtld_progname _dl_argv[0]
 
 /* Flag set at startup and cleared when the last initializer has run.  */
 extern int _dl_starting_up;

sysdeps/powerpc/powerpc32/dl-start.S

@@ -54,7 +54,7 @@ _dl_start_user:
 /*  &_dl_argc in 29, &_dl_argv in 27, and _dl_loaded in 28.  */
 	lwz	r28,_rtld_local@got(r31)
 	lwz	r29,_dl_argc@got(r31)
-	lwz	r27,INTUSE(_dl_argv)@got(r31)
+	lwz	r27,__GI__dl_argv@got(r31)
 
 /* Call _dl_init (_dl_loaded, _dl_argc, _dl_argv, _dl_argv+_dl_argc+1). */
 	lwz	r3,0(r28)

sysdeps/powerpc/powerpc64/dl-machine.h

@@ -169,7 +169,7 @@ DL_STARTING_UP_DEF							\
 ".LC__dl_argc:\n"							\
 "	.tc _dl_argc[TC],_dl_argc\n"					\
 ".LC__dl_argv:\n"							\
-"	.tc _dl_argv_internal[TC],_dl_argv_internal\n"			\
+"	.tc __GI__dl_argv[TC],__GI__dl_argv\n"				\
 ".LC__dl_fini:\n"							\
 "	.tc _dl_fini[TC],_dl_fini\n"					\
 "	.popsection\n"							\