Add x32 support to ldconfig

ChangeLog

@@ -1,3 +1,22 @@
+2012-03-16  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* sysdeps/generic/ldconfig.h (FLAG_X8664_LIBX32): New macro.
+	* elf/cache.c (print_entry): Handle FLAG_X8664_LIBX32.
+
+	* sysdeps/unix/sysv/linux/i386/readelflib.c (process_elf_file):
+	Move e_machine check before EI_CLASS check.  Handle x32
+	libraries.  Check EM_IA_64 only if SKIP_EM_IA_64 isn't defined.
+	* sysdeps/unix/sysv/linux/x86_64/readelflib.c: Just define
+	SKIP_EM_IA_64 and include
+	<sysdeps/unix/sysv/linux/i386/readelflib.c>.
+
+	* sysdeps/unix/sysv/linux/x86_64/dl-cache.h:
+	Don't include <sysdeps/unix/sysv/linux/sparc/dl-cache.h>.
+	(add_system_dir): New macro.
+
+	* sysdeps/unix/sysv/linux/x86_64/ldconfig.h
+	(SYSDEP_KNOWN_INTERPRETER_NAMES): Add /libx32/ld-linux-x32.so.2.
+
 2012-03-16  Joseph Myers  <joseph@codesourcery.com>
 
 	[BZ #2551]

elf/cache.c

@@ -90,6 +90,10 @@ print_entry (const char *lib, int flag, unsigned int osversion,
       break;
     case FLAG_MIPS64_LIBN64:
       fputs (",64bit", stdout);
+      break;
+    case FLAG_X8664_LIBX32:
+      fputs (",x32", stdout);
+      break;
     case 0:
       break;
     default:

sysdeps/generic/ldconfig.h

@@ -33,6 +33,7 @@
 #define FLAG_POWERPC_LIB64	0x0500
 #define FLAG_MIPS64_LIBN32	0x0600
 #define FLAG_MIPS64_LIBN64	0x0700
+#define FLAG_X8664_LIBX32	0x0800
 
 /* Name of auxiliary cache.  */
 #define _PATH_LDCONFIG_AUX_CACHE "/var/cache/ldconfig/aux-cache"

sysdeps/unix/sysv/linux/i386/readelflib.c

@@ -32,41 +32,53 @@ process_elf_file (const char *file_name, const char *lib, int *flag,
 		  size_t file_length)
 {
   ElfW(Ehdr) *elf_header = (ElfW(Ehdr) *) file_contents;
-  int ret;
+  int ret, file_flag = 0;
 
-  if (elf_header->e_ident [EI_CLASS] == ELFCLASS32)
-    return process_elf32_file (file_name, lib, flag, osversion, soname,
-			       file_contents, file_length);
-  else
-    {
   switch (elf_header->e_machine)
     {
-	case EM_IA_64:
     case EM_X86_64:
+      if (elf_header->e_ident[EI_CLASS] == ELFCLASS64)
+	/* X86-64 64bit libraries are always libc.so.6+.  */
+	file_flag = FLAG_X8664_LIB64|FLAG_ELF_LIBC6;
+      else
+	/* X32 libraries are always libc.so.6+.  */
+	file_flag = FLAG_X8664_LIBX32|FLAG_ELF_LIBC6;
       break;
+#ifndef SKIP_EM_IA_64
+    case EM_IA_64:
+      if (elf_header->e_ident[EI_CLASS] == ELFCLASS64)
+	{
+	  /* IA64 64bit libraries are always libc.so.6+.  */
+	  file_flag = FLAG_IA64_LIB64|FLAG_ELF_LIBC6;
+	  break;
+	}
+      goto failed;
+#endif
+    case EM_386:
+      if (elf_header->e_ident[EI_CLASS] == ELFCLASS32)
+	break;
+      /* Fall through.  */
     default:
+#ifndef SKIP_EM_IA_64
+failed:
+#endif
       error (0, 0, _("%s is for unknown machine %d.\n"),
 	     file_name, elf_header->e_machine);
       return 1;
     }
 
+  if (elf_header->e_ident[EI_CLASS] == ELFCLASS32)
+    ret = process_elf32_file (file_name, lib, flag, osversion, soname,
+			      file_contents, file_length);
+  else
     ret = process_elf64_file (file_name, lib, flag, osversion, soname,
 			      file_contents, file_length);
-      /* IA64/X86-64 64bit libraries are always libc.so.6+.  */
+
-      if (!ret)
+  if (!ret && file_flag)
-	switch (elf_header->e_machine)
+    *flag = file_flag;
-	  {
-	  case EM_IA_64:
-	    *flag = FLAG_IA64_LIB64|FLAG_ELF_LIBC6;
-	    break;
-	  case EM_X86_64:
-	    *flag = FLAG_X8664_LIB64|FLAG_ELF_LIBC6;
-	    break;
-	  }
 
   return ret;
 }
-}
 
 #undef __ELF_NATIVE_CLASS
 #undef process_elf_file

sysdeps/unix/sysv/linux/x86_64/dl-cache.h

@@ -21,4 +21,31 @@
 #define _dl_cache_check_flags(flags)			\
   ((flags) == _DL_CACHE_DEFAULT_ID)
 
-#include <sysdeps/unix/sysv/linux/sparc/dl-cache.h>
+#define add_system_dir(dir) \
+  do								\
+    {								\
+      size_t len = strlen (dir);				\
+      char path[len + 4];					\
+      memcpy (path, dir, len + 1);				\
+      if (len >= 6 && ! memcmp (path + len - 6, "/lib64", 6))	\
+	{							\
+	  len -= 2;						\
+	  path[len] = '\0';					\
+	}							\
+      else if (len >= 7						\
+	       && ! memcmp (path + len - 7, "/libx32", 7))	\
+	{							\
+	  len -= 3;						\
+	  path[len] = '\0';					\
+	}							\
+      add_dir (path);						\
+      if (len >= 4 && ! memcmp (path + len - 4, "/lib", 4))	\
+	{							\
+	  memcpy (path + len, "64", 3);				\
+	  add_dir (path);					\
+	  memcpy (path + len, "x32", 4);				\
+	  add_dir (path);					\
+	}							\
+    } while (0)
+
+#include <sysdeps/generic/dl-cache.h>

sysdeps/unix/sysv/linux/x86_64/ldconfig.h

@@ -19,6 +19,7 @@
 
 #define SYSDEP_KNOWN_INTERPRETER_NAMES \
   { "/lib/ld-linux.so.2", FLAG_ELF_LIBC6 }, \
+  { "/libx32/ld-linux-x32.so.2", FLAG_ELF_LIBC6 }, \
   { "/lib64/ld-linux-x86-64.so.2", FLAG_ELF_LIBC6 },
 #define SYSDEP_KNOWN_LIBRARY_NAMES \
   { "libc.so.6", FLAG_ELF_LIBC6 },	\

sysdeps/unix/sysv/linux/x86_64/readelflib.c

@@ -1,61 +1,2 @@
-/* Copyright (C) 1999, 2001, 2002, 2005 Free Software Foundation, Inc.
+#define SKIP_EM_IA_64
-   This file is part of the GNU C Library.
+#include <sysdeps/unix/sysv/linux/i386/readelflib.c>
-   Contributed by Andreas Jaeger <aj@suse.de>, 1999 and
-		  Jakub Jelinek <jakub@redhat.com>, 1999.
-
-   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, see
-   <http://www.gnu.org/licenses/>.  */
-
-
-int process_elf32_file (const char *file_name, const char *lib, int *flag,
-			unsigned int *osversion, char **soname,
-			void *file_contents, size_t file_length);
-int process_elf64_file (const char *file_name, const char *lib, int *flag,
-			unsigned int *osversion, char **soname,
-			void *file_contents, size_t file_length);
-
-/* Returns 0 if everything is ok, != 0 in case of error.  */
-int
-process_elf_file (const char *file_name, const char *lib, int *flag,
-		  unsigned int *osversion, char **soname, void *file_contents,
-		  size_t file_length)
-{
-  ElfW(Ehdr) *elf_header = (ElfW(Ehdr) *) file_contents;
-  int ret;
-
-  if (elf_header->e_ident [EI_CLASS] == ELFCLASS32)
-    return process_elf32_file (file_name, lib, flag, osversion, soname,
-			       file_contents, file_length);
-  else
-    {
-      ret = process_elf64_file (file_name, lib, flag, osversion, soname,
-				file_contents, file_length);
-      /* x86-64 64bit libraries are always libc.so.6+.  */
-      if (!ret)
-	*flag = FLAG_X8664_LIB64|FLAG_ELF_LIBC6;
-      return ret;
-    }
-}
-
-#undef __ELF_NATIVE_CLASS
-#undef process_elf_file
-#define process_elf_file process_elf32_file
-#define __ELF_NATIVE_CLASS 32
-#include "elf/readelflib.c"
-
-#undef __ELF_NATIVE_CLASS
-#undef process_elf_file
-#define process_elf_file process_elf64_file
-#define __ELF_NATIVE_CLASS 64
-#include "elf/readelflib.c"