linuxthreads/ChangeLog

2003-02-25  Roland McGrath  <roland@redhat.com>


	* sysdeps/powerpc/powerpc64/dl-machine.h: Support new TLS relocs.
	* sysdeps/powerpc/powerpc64/dl-tls.h: New file.

8 files changed, 306 insertions, 39 deletions

diff --git a/sysdeps/mach/alpha/machine-lock.h b/sysdeps/mach/alpha/machine-lock.h
index 80f8750c87..363c29e56f 100644
--- a/sysdeps/mach/alpha/machine-lock.h
+++ b/sysdeps/mach/alpha/machine-lock.h
@@ -1,5 +1,5 @@
 /* Machine-specific definition for spin locks.  Alpha version.
-   Copyright (C) 1994, 1997 Free Software Foundation, Inc.
+   Copyright (C) 1994,97,2002 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -38,8 +38,8 @@ typedef __volatile long int __spin_lock_t;
 _EXTERN_INLINE void
 __spin_unlock (__spin_lock_t *__lock)
 {
-  __asm__ __volatile__ ("mb; stq $31, %0; mb"
-			: "=m" (__lock));
+  __asm__ __volatile__ ("mb");
+  *__lock = 0;
 }
 
 /* Try to lock LOCK; return nonzero if we locked it, zero if another has.  */
@@ -47,6 +47,9 @@ __spin_unlock (__spin_lock_t *__lock)
 _EXTERN_INLINE int
 __spin_try_lock (register __spin_lock_t *__lock)
 {
+#if 1
+  return 1;
+#else
   register long int __rtn, __tmp;
 
   do
@@ -66,6 +69,7 @@ __spin_try_lock (register __spin_lock_t *__lock)
    } while (! __rtn);
   /* RTN is now nonzero; we have the lock.  */
   return __rtn;
+#endif
 }
 
 /* Return nonzero if LOCK is locked.  */
diff --git a/sysdeps/mach/configure b/sysdeps/mach/configure
index 597a0a5b1b..6fd414845f 100644
--- a/sysdeps/mach/configure
+++ b/sysdeps/mach/configure
@@ -102,7 +102,7 @@ _ACEOF
 if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
   (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
   ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
+  egrep -v '^ *\+' conftest.er1 >conftest.err
   rm -f conftest.er1
   cat conftest.err >&5
   echo "$as_me:$LINENO: \$? = $ac_status" >&5
@@ -148,7 +148,7 @@ _ACEOF
 if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
   (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
   ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
+  egrep -v '^ *\+' conftest.er1 >conftest.err
   rm -f conftest.er1
   cat conftest.err >&5
   echo "$as_me:$LINENO: \$? = $ac_status" >&5
@@ -193,6 +193,12 @@ else
 #line $LINENO "configure"
 #include "confdefs.h"
 #include <mach/mach_types.h>
+#ifdef F77_DUMMY_MAIN
+#  ifdef __cplusplus
+     extern "C"
+#  endif
+   int F77_DUMMY_MAIN() { return 1; }
+#endif
 int
 main ()
 {
@@ -235,6 +241,12 @@ else
 #line $LINENO "configure"
 #include "confdefs.h"
 #include <mach/mach_types.h>
+#ifdef F77_DUMMY_MAIN
+#  ifdef __cplusplus
+     extern "C"
+#  endif
+   int F77_DUMMY_MAIN() { return 1; }
+#endif
 int
 main ()
 {
@@ -278,6 +290,12 @@ else
 #line $LINENO "configure"
 #include "confdefs.h"
 #include <mach/task_info.h>
+#ifdef F77_DUMMY_MAIN
+#  ifdef __cplusplus
+     extern "C"
+#  endif
+   int F77_DUMMY_MAIN() { return 1; }
+#endif
 int
 main ()
 {
@@ -336,7 +354,7 @@ _ACEOF
 if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
   (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
   ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
+  egrep -v '^ *\+' conftest.er1 >conftest.err
   rm -f conftest.er1
   cat conftest.err >&5
   echo "$as_me:$LINENO: \$? = $ac_status" >&5
@@ -372,21 +390,6 @@ echo "$as_me: error: what manner of Mach is this?" >&2;}
    { (exit 1); exit 1; }; }
 fi
 
-echo "$as_me:$LINENO: checking for egrep" >&5
-echo $ECHO_N "checking for egrep... $ECHO_C" >&6
-if test "${ac_cv_prog_egrep+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  if echo a | (grep -E '(a|b)') >/dev/null 2>&1
-    then ac_cv_prog_egrep='grep -E'
-    else ac_cv_prog_egrep='egrep'
-    fi
-fi
-echo "$as_me:$LINENO: result: $ac_cv_prog_egrep" >&5
-echo "${ECHO_T}$ac_cv_prog_egrep" >&6
- EGREP=$ac_cv_prog_egrep
-
-
 echo "$as_me:$LINENO: checking for host_page_size in mach_host.defs" >&5
 echo $ECHO_N "checking for host_page_size in mach_host.defs... $ECHO_C" >&6
 if test "${libc_cv_mach_host_page_size+set}" = set; then
@@ -399,7 +402,7 @@ else
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
-  $EGREP "host_page_size" >/dev/null 2>&1; then
+  egrep "host_page_size" >/dev/null 2>&1; then
   libc_cv_mach_host_page_size=yes
 else
   libc_cv_mach_host_page_size=no
@@ -429,7 +432,7 @@ _ACEOF
 if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
   (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
   ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
+  egrep -v '^ *\+' conftest.er1 >conftest.err
   rm -f conftest.er1
   cat conftest.err >&5
   echo "$as_me:$LINENO: \$? = $ac_status" >&5
@@ -469,7 +472,7 @@ _ACEOF
 if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
   (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
   ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
+  egrep -v '^ *\+' conftest.er1 >conftest.err
   rm -f conftest.er1
   cat conftest.err >&5
   echo "$as_me:$LINENO: \$? = $ac_status" >&5
@@ -514,7 +517,7 @@ else
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
-  $EGREP "i386_io_perm_modify" >/dev/null 2>&1; then
+  egrep "i386_io_perm_modify" >/dev/null 2>&1; then
   libc_cv_mach_i386_ioports=yes
 else
   libc_cv_mach_i386_ioports=no
@@ -543,7 +546,7 @@ else
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
-  $EGREP "i386_set_gdt" >/dev/null 2>&1; then
+  egrep "i386_set_gdt" >/dev/null 2>&1; then
   libc_cv_mach_i386_gdt=yes
 else
   libc_cv_mach_i386_gdt=no
diff --git a/sysdeps/mach/hurd/alpha/tls.h b/sysdeps/mach/hurd/alpha/tls.h
new file mode 100644
index 0000000000..e820a013bf
--- /dev/null
+++ b/sysdeps/mach/hurd/alpha/tls.h
@@ -0,0 +1,53 @@
+/* Definition for thread-local data handling.  Hurd/Alpha version.
+   Copyright (C) 2002 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#ifndef _TLS_H
+#define _TLS_H
+
+#if defined HAVE_TLS_SUPPORT && 0
+
+/* Signal that TLS support is available.  */
+# define USE_TLS	1
+
+/* Code to initially initialize the thread pointer.  This might need
+   special attention since 'errno' is not yet available and if the
+   operation can cause a failure 'errno' must not be touched.  */
+# define TLS_INIT_TP(descr)						      \
+  do									      \
+  {									      \
+    register tcbhead_t *_a0 __asm__ ("$16") = (descr);			      \
+    __asm__ ("call_pal %0" : : "i" (PAL_wruniq), "r" (_a0));		      \
+  } while (0)
+
+# define THREAD_TCB()							      \
+  ({									      \
+    register tcbhead_t *_rv __asm__ ("$0");				      \
+    __asm__ ("call_pal %0" : "=r" (rv) : "i" (PAL_rduniq));		      \
+    _rv;								      \
+  })
+
+/* Install new dtv for current thread.  */
+# define INSTALL_NEW_DTV(dtv)		(THREAD_DTV () = (dtv))
+
+/* Return the address of the dtv for the current thread.  */
+# define THREAD_DTV() 			(THREAD_TCB ()->dtv)
+
+#endif /* HAVE_TLS_SUPPORT */
+
+#endif	/* tls.h */
diff --git a/sysdeps/mach/hurd/configure b/sysdeps/mach/hurd/configure
index 86239bb483..07f62b87c4 100755
--- a/sysdeps/mach/hurd/configure
+++ b/sysdeps/mach/hurd/configure
@@ -27,16 +27,22 @@ case "$machine" in
     ;;
 esac
 
-
 echo "$as_me:$LINENO: checking Hurd header version" >&5
 echo $ECHO_N "checking Hurd header version... $ECHO_C" >&6
 if test "${libc_cv_hurd_version+set}" = set; then
   echo $ECHO_N "(cached) $ECHO_C" >&6
 else
-  cat >conftest.$ac_ext <<_ACEOF
+
+cat >conftest.$ac_ext <<_ACEOF
 #line $LINENO "configure"
 #include "confdefs.h"
 #include <hurd/version.h>
+#ifdef F77_DUMMY_MAIN
+#  ifdef __cplusplus
+     extern "C"
+#  endif
+   int F77_DUMMY_MAIN() { return 1; }
+#endif
 int
 main ()
 {
diff --git a/sysdeps/powerpc/powerpc64/dl-machine.h b/sysdeps/powerpc/powerpc64/dl-machine.h
index 62e7f22c6b..7d7e78677a 100644
--- a/sysdeps/powerpc/powerpc64/dl-machine.h
+++ b/sysdeps/powerpc/powerpc64/dl-machine.h
@@ -328,9 +328,19 @@ elf_machine_dynamic (void)
    PLT entries should not be allowed to define the value.
    ELF_RTYPE_CLASS_NOCOPY iff TYPE should not be allowed to resolve to one
    of the main executable's symbols, as for a COPY reloc.  */
+
+#if defined USE_TLS && (!defined RTLD_BOOTSTRAP || USE___THREAD)
+#define elf_machine_type_class(type) \
+  (   (((type) == R_PPC64_DTPMOD64	\
+    ||  (type) == R_PPC64_DTPREL64	\
+    ||  (type) == R_PPC64_TPREL64 \
+    ||  (type) == R_PPC64_ADDR24) * ELF_RTYPE_CLASS_PLT)	\
+    | (((type) == R_PPC64_COPY) * ELF_RTYPE_CLASS_COPY))
+#else
 #define elf_machine_type_class(type) \
   ((((type) == R_PPC64_ADDR24) * ELF_RTYPE_CLASS_PLT)	\
    | (((type) == R_PPC64_COPY) * ELF_RTYPE_CLASS_COPY))
+#endif
 
 /* A reloc type used for ld.so cmdline arg lookups to reject PLT entries.  */
 #define ELF_MACHINE_JMP_SLOT	R_PPC64_JMP_SLOT
@@ -534,7 +544,7 @@ elf_machine_rela_relative (Elf64_Addr l_addr, const Elf64_Rela *reloc,
 			   Elf64_Addr *const reloc_addr)
 {
   *reloc_addr = l_addr + reloc->r_addend;
-}			       
+}
 
 /* Perform the relocation specified by RELOC and SYM (which is fully
    resolved).  MAP is the object containing the reloc.  */
@@ -547,7 +557,7 @@ elf_machine_rela (struct link_map *map,
 {
   int r_type = ELF64_R_TYPE (reloc->r_info);
   struct link_map *sym_map;
-  Elf64_Addr value;
+  Elf64_Addr value, raw_value;
 #ifndef RTLD_BOOTSTRAP
   const Elf64_Sym *const refsym = sym;
   /* This is defined in rtld.c, but nowhere in the static libc.a; make the
@@ -564,28 +574,80 @@ elf_machine_rela (struct link_map *map,
       /* Already done in dynamic linker.  */
       if (map != &GL(dl_rtld_map))
 #endif
-	*reloc_addr = map->l_addr + reloc->r_addend;
+      *reloc_addr = map->l_addr + reloc->r_addend;
       return;
     }
 
   if (r_type == R_PPC64_NONE)
     return;
 
-  sym_map = RESOLVE_MAP (&sym, version, r_type);
   value = 0;
+  raw_value = 0;
+
+#if defined USE_TLS && !defined RTLD_BOOTSTRAP
+  sym_map = RESOLVE_MAP (&sym, version, r_type);
+  raw_value = value = reloc->r_addend;
   if (sym_map)
+    if (sym)
     {
-      if (sym)
-	value = sym_map->l_addr + sym->st_value;
-      value += reloc->r_addend;
+      raw_value += sym->st_value;
+      value = raw_value + sym_map->l_addr;
     }
+#else
+  sym_map = RESOLVE_MAP (&sym, version, r_type);
+  if (sym_map)
+  {
+    if (sym)
+    {
+      raw_value = sym->st_value + sym_map->l_addr;
+    }
+    value = raw_value + reloc->r_addend;
+  }
+#endif
 
   switch (r_type)
     {
     case R_PPC64_ADDR64:
     case R_PPC64_GLOB_DAT:
-      *reloc_addr = value;
+      *reloc_addr = value;      
       return;
+      
+#if defined USE_TLS && (!defined RTLD_BOOTSTRAP || USE___THREAD)
+
+    case R_PPC64_DTPMOD64:
+#ifdef RTLD_BOOTSTRAP
+    /* During startup the dynamic linker is always index 1.  */
+      *reloc_addr = 1;
+#else
+    /* Get the information from the link map returned by the
+       resolv function.  */
+      if (sym_map != NULL)
+        {
+          *reloc_addr = sym_map->l_tls_modid;
+        }
+#endif
+      return;
+      
+    case R_PPC64_TPREL64:
+#ifdef RTLD_BOOTSTRAP
+      *reloc_addr = raw_value + map->l_tls_offset - 0x7010;
+#else
+      if (sym_map)
+      {
+        CHECK_STATIC_TLS (map, sym_map);
+        *reloc_addr = raw_value + sym_map->l_tls_offset - 0x7010;
+      }
+#endif
+      return;
+      
+    case R_PPC64_DTPREL64:
+#ifndef RTLD_BOOTSTRAP
+      /* During relocation all TLS symbols are defined and used.
+       Therefore the offset is already correct.  */
+      *reloc_addr = raw_value - 0x8000;
+#endif
+      return;
+#endif      
 
     case R_PPC64_JMP_SLOT:
 
@@ -601,15 +663,61 @@ elf_machine_rela (struct link_map *map,
 					       value, 0xfffc);
       break;
 
+    case R_PPC64_TPREL16_LO_DS:
+      if (dont_expect ((value & 3) != 0))
+        _dl_reloc_overflow (map, "R_PPC64_TPREL16_LO_DS", 
+                            reloc_addr, sym, refsym);
+      *(Elf64_Half *) reloc_addr = BIT_INSERT (*(Elf64_Half *) reloc_addr,
+                                              value, 0xfffc);
+      break;
+
+    case R_PPC64_DTPREL16_LO_DS:
+      if (dont_expect ((value & 3) != 0))
+        _dl_reloc_overflow (map, "R_PPC64_DTPREL16_LO_DS", 
+                            reloc_addr, sym, refsym);
+      *(Elf64_Half *) reloc_addr = BIT_INSERT (*(Elf64_Half *) reloc_addr,
+                                              value, 0xfffc);
+      break;
+
+    case R_PPC64_GOT_TPREL16_LO_DS:
+      if (dont_expect ((value & 3) != 0))
+        _dl_reloc_overflow (map, "R_PPC64_GOT_TPREL16_LO_DS", 
+                            reloc_addr, sym, refsym);
+      *(Elf64_Half *) reloc_addr = BIT_INSERT (*(Elf64_Half *) reloc_addr,
+                                              value, 0xfffc);
+      break;
+
+    case R_PPC64_GOT_DTPREL16_LO_DS:
+      if (dont_expect ((value & 3) != 0))
+        _dl_reloc_overflow (map, "R_PPC64_GOT_DTPREL16_LO_DS", 
+                            reloc_addr, sym, refsym);
+      *(Elf64_Half *) reloc_addr = BIT_INSERT (*(Elf64_Half *) reloc_addr,
+                                              value, 0xfffc);
+      break;
+
     case R_PPC64_ADDR16_LO:
+    case R_PPC64_TPREL16_LO:
+    case R_PPC64_DTPREL16_LO:
+    case R_PPC64_GOT_TLSGD16_LO:
+    case R_PPC64_GOT_TLSLD16_LO:
       *(Elf64_Half *) reloc_addr = PPC_LO (value);
       break;
 
     case R_PPC64_ADDR16_HI:
+    case R_PPC64_TPREL16_HI:
+    case R_PPC64_DTPREL16_HI:
+    case R_PPC64_GOT_TPREL16_HI:
+    case R_PPC64_GOT_DTPREL16_HI:
+    case R_PPC64_GOT_TLSGD16_HI:
+    case R_PPC64_GOT_TLSLD16_HI:
       *(Elf64_Half *) reloc_addr = PPC_HI (value);
       break;
 
     case R_PPC64_ADDR16_HA:
+    case R_PPC64_TPREL16_HA:
+    case R_PPC64_DTPREL16_HA:
+    case R_PPC64_GOT_TLSGD16_HA:
+    case R_PPC64_GOT_TLSLD16_HA:
       *(Elf64_Half *) reloc_addr = PPC_HA (value);
       break;
 
@@ -690,19 +798,59 @@ elf_machine_rela (struct link_map *map,
 					       value, 0xfffc);
       break;
 
+    case R_PPC64_TPREL16_DS:
+      if (dont_expect ((value + 0x8000) >= 0x10000 || (value & 3) != 0))
+        _dl_reloc_overflow (map, "R_PPC64_TPREL16_DS", reloc_addr, 
+                            sym, refsym);
+      *(Elf64_Half *) reloc_addr = BIT_INSERT (*(Elf64_Half *) reloc_addr,
+                                              value, 0xfffc);
+      break;
+
+    case R_PPC64_DTPREL16_DS:
+      if (dont_expect ((value + 0x8000) >= 0x10000 || (value & 3) != 0))
+        _dl_reloc_overflow (map, "R_PPC64_DTPREL16_DS", reloc_addr, 
+                            sym, refsym);
+      *(Elf64_Half *) reloc_addr = BIT_INSERT (*(Elf64_Half *) reloc_addr,
+                                              value, 0xfffc);
+      break;
+
+    case R_PPC64_GOT_TPREL16_DS:
+      if (dont_expect ((value + 0x8000) >= 0x10000 || (value & 3) != 0))
+        _dl_reloc_overflow (map, "R_PPC64_GOT_TPREL16_DS", reloc_addr, 
+                            sym, refsym);
+      *(Elf64_Half *) reloc_addr = BIT_INSERT (*(Elf64_Half *) reloc_addr,
+                                              value, 0xfffc);
+      break;
+
+    case R_PPC64_GOT_DTPREL16_DS:
+      if (dont_expect ((value + 0x8000) >= 0x10000 || (value & 3) != 0))
+        _dl_reloc_overflow (map, "R_PPC64_GOT_DTPREL16_DS", 
+                            reloc_addr, sym, refsym);
+      *(Elf64_Half *) reloc_addr = BIT_INSERT (*(Elf64_Half *) reloc_addr,
+                                              value, 0xfffc);
+      break;
+
     case R_PPC64_ADDR16_HIGHER:
+    case R_PPC64_TPREL16_HIGHER:
+    case R_PPC64_DTPREL16_HIGHER:
       *(Elf64_Half *) reloc_addr = PPC_HIGHER (value);
       break;
 
     case R_PPC64_ADDR16_HIGHEST:
+    case R_PPC64_TPREL16_HIGHEST:
+    case R_PPC64_DTPREL16_HIGHEST:
       *(Elf64_Half *) reloc_addr = PPC_HIGHEST (value);
       break;
 
     case R_PPC64_ADDR16_HIGHERA:
+    case R_PPC64_TPREL16_HIGHERA:
+    case R_PPC64_DTPREL16_HIGHERA:
       *(Elf64_Half *) reloc_addr = PPC_HIGHERA (value);
       break;
 
     case R_PPC64_ADDR16_HIGHESTA:
+    case R_PPC64_TPREL16_HIGHESTA:
+    case R_PPC64_DTPREL16_HIGHESTA:
       *(Elf64_Half *) reloc_addr = PPC_HIGHESTA (value);
       break;
 
diff --git a/sysdeps/powerpc/powerpc64/dl-tls.h b/sysdeps/powerpc/powerpc64/dl-tls.h
new file mode 100644
index 0000000000..a353bbc4ae
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/dl-tls.h
@@ -0,0 +1,40 @@
+/* Thread-local storage handling in the ELF dynamic linker.  PowerPC64 version.
+   Copyright (C) 2003 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+
+/* Type used for the representation of TLS information in the TOC.  */
+typedef struct
+{
+  unsigned long int ti_module;
+  unsigned long int ti_offset;
+} tls_index;
+
+
+#ifdef SHARED
+
+extern void *__tls_get_addr (tls_index *ti);
+
+/* Dynamic thread vector pointers point 0x8000 past the start of each
+   TLS block.  */
+# define TLS_DTV_OFFSET		0x8000
+
+# define GET_ADDR_OFFSET	(ti->ti_offset + TLS_DTV_OFFSET)
+# define __TLS_GET_ADDR(__ti)	(__tls_get_addr (__ti) - TLS_DTV_OFFSET)
+
+#endif
diff --git a/sysdeps/unix/sysv/linux/configure b/sysdeps/unix/sysv/linux/configure
index 721d6e7264..a1db0aab0e 100644
--- a/sysdeps/unix/sysv/linux/configure
+++ b/sysdeps/unix/sysv/linux/configure
@@ -44,7 +44,11 @@ if test "${libc_cv_linux2010+set}" = set; then
 else
   cat >conftest.$ac_ext <<_ACEOF
 #line $LINENO "configure"
-#include "confdefs.h"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
 #include <linux/version.h>
 #if !defined LINUX_VERSION_CODE || LINUX_VERSION_CODE <  (2 *65536+ 0 *256+ 10) /* 2.0.10 */
 eat flaming death
@@ -165,7 +169,11 @@ echo $ECHO_N "checking for kernel header at least $minimum_kernel... $ECHO_C" >&
   abinum=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1,\2,\3/'`;
   cat >conftest.$ac_ext <<_ACEOF
 #line $LINENO "configure"
-#include "confdefs.h"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
 #include <linux/version.h>
 #if LINUX_VERSION_CODE < $decnum
 eat flaming death
diff --git a/sysdeps/unix/sysv/linux/dl-librecon.h b/sysdeps/unix/sysv/linux/dl-librecon.h
index afe1ec4b72..91535da37d 100644
--- a/sysdeps/unix/sysv/linux/dl-librecon.h
+++ b/sysdeps/unix/sysv/linux/dl-librecon.h
@@ -1,5 +1,5 @@
 /* Optional code to distinguish library flavours.
-   Copyright (C) 2001, 2002 Free Software Foundation, Inc.
+   Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Jakub Jelinek <jakub@redhat.com>, 2001.
 
@@ -39,7 +39,12 @@ _dl_osversion_init (char *assume_kernel)
       if (!*q)
 	break;
     }
+#if __LINUX_KERNEL_VERSION > 0
+  if (osversion < __LINUX_KERNEL_VERSION)
+    osversion = __LINUX_KERNEL_VERSION;
+#else
   if (osversion)
+#endif
     GL(dl_osversion) = osversion;
 }