Update.

* elf/Makefile (distribute): Add dl-osinfo.h.
	* sysdeps/generic/dl-osinfo.h: New file.
	* sysdeps/unix/sysv/linux/dl-osinfo.h: New file.
	* sysdeps/generic/dl-sysdep.c (_dl_sysdep_start): Use DL_SYSDEP_OSCHECK
	if defined.
	* sysdeps/unix/sysv/linux/init-first.c: Perform kernel version test
	only for !SHARED case.  Get the code from dl-osinfo.h.

ChangeLog

@@ -1,5 +1,13 @@
 2000-08-22  Ulrich Drepper  <drepper@redhat.com>
 
+	* elf/Makefile (distribute): Add dl-osinfo.h.
+	* sysdeps/generic/dl-osinfo.h: New file.
+	* sysdeps/unix/sysv/linux/dl-osinfo.h: New file.
+	* sysdeps/generic/dl-sysdep.c (_dl_sysdep_start): Use DL_SYSDEP_OSCHECK
+	if defined.
+	* sysdeps/unix/sysv/linux/init-first.c: Perform kernel version test
+	only for !SHARED case.  Get the code from dl-osinfo.h.
+
 	* stdlib/random_r.c: Cleanups.
 	* stdlib/tst-random.c: New file.
 	* stdlib/Makefile (tests): Add tst-random.

elf/Makefile

@@ -47,7 +47,7 @@ distribute	:= $(rtld-routines:=.c) dynamic-link.h do-rel.h dl-machine.h \
 		   vismain.c vismod1.c vismod2.c vismod3.c \
 		   constload2.c constload3.c filtmod1.c filtmod2.c \
 		   nodlopenmod.c nodelete.c nodelmod1.c nodelmod2.c \
-		   nodelmod3.c nodelmod4.c nodlopen.c
+		   nodelmod3.c nodelmod4.c nodlopen.c dl-osinfo.h
 
 include ../Makeconfig
 

sysdeps/generic/dl-osinfo.h

@@ -0,0 +1 @@
+/* Nothing needed in general.  */

sysdeps/generic/dl-sysdep.c

@@ -33,6 +33,7 @@
 #include <entry.h>
 #include <dl-machine.h>
 #include <dl-procinfo.h>
+#include <dl-osinfo.h>
 
 extern int _dl_argc;
 extern char **_dl_argv;
@@ -59,7 +60,7 @@ unsigned long int _dl_hwcap_mask = HWCAP_IMPORTANT;
 
 
 #ifndef DL_FIND_ARG_COMPONENTS
-#define DL_FIND_ARG_COMPONENTS(cookie, argc, argv, envp, auxp)	\
+# define DL_FIND_ARG_COMPONENTS(cookie, argc, argv, envp, auxp)	\
   do {								\
     void **_tmp;						\
     (argc) = *(long *) cookie;					\
@@ -87,7 +88,8 @@ _dl_sysdep_start (void **start_argptr,
   gid_t egid = 0;
   unsigned int seen;
 
-  DL_FIND_ARG_COMPONENTS (start_argptr, _dl_argc, _dl_argv, _environ, _dl_auxv);
+  DL_FIND_ARG_COMPONENTS (start_argptr, _dl_argc, _dl_argv, _environ,
+			  _dl_auxv);
 
   user_entry = (ElfW(Addr)) &ENTRY_POINT;
   _dl_platform = NULL; /* Default to nothing known about the platform.  */
@@ -176,6 +178,10 @@ _dl_sysdep_start (void **start_argptr,
   if (__builtin_expect (__libc_enable_secure, 0))
     __libc_check_standard_fds ();
 
+#ifdef DL_SYSDEP_OSCHECK
+  DL_SYSDEP_OSCHECK (dl_fatal);
+#endif
+
   (*dl_main) (phdr, phnum, &user_entry);
   return user_entry;
 }

sysdeps/unix/sysv/linux/dl-osinfo.h

@@ -0,0 +1,99 @@
+/* Operating system specific code  for generic dynamic loader functions.
+   Copyright (C) 2000 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <sys/sysctl.h>
+
+#ifdef SHARED
+/* This is the function used in the dynamic linker to print the fatal error
+   message.  */
+static inline void
+__attribute__ ((__noreturn__))
+dl_fatal (const char *str)
+{
+  _dl_sysdep_output (2, str, NULL);
+  _exit (1);
+}
+#endif
+
+
+#define DL_SYSDEP_OSCHECK(FATAL) \
+  do {									      \
+    /* Test whether the kernel is new enough.  This test is only	      \
+       performed if the library is not compiled to run on all		      \
+       kernels.  */							      \
+    if (__LINUX_KERNEL_VERSION > 0)					      \
+      {									      \
+	static const int sysctl_args[] = { CTL_KERN, KERN_OSRELEASE };	      \
+	char buf[64];							      \
+	size_t reslen = sizeof (buf);					      \
+	unsigned int version;						      \
+	int parts;							      \
+	char *cp;							      \
+									      \
+	/* Try reading the number using `sysctl' first.  */		      \
+	if (__sysctl ((int *) sysctl_args,				      \
+		      sizeof (sysctl_args) / sizeof (sysctl_args[0]),	      \
+		      buf, &reslen, NULL, 0) < 0)			      \
+	  {								      \
+	    /* This was not successful.  Now try reading the /proc	      \
+	       filesystem.  */						      \
+	    int fd = __open ("/proc/sys/kernel/osrelease", O_RDONLY);	      \
+	    if (fd == -1						      \
+		|| (reslen = __read (fd, buf, sizeof (buf))) <= 0)	      \
+	      /* This also didn't work.  We give up since we cannot	      \
+		 make sure the library can actually work.  */		      \
+	      FATAL ("FATAL: cannot determine library version\n");	      \
+									      \
+	    __close (fd);						      \
+	  }								      \
+	buf[MIN (reslen, sizeof (buf) - 1)] = '\0';			      \
+									      \
+	/* Now convert it into a number.  The string consists of at most      \
+	   three parts.  */						      \
+	version = 0;							      \
+	parts = 0;							      \
+	cp = buf;							      \
+	while ((*cp >= '0') && (*cp <= '9'))				      \
+	  {								      \
+	    unsigned int here = *cp++ - '0';				      \
+									      \
+	    while ((*cp >= '0') && (*cp <= '9'))			      \
+	      {								      \
+		here *= 10;						      \
+		here += *cp++ - '0';					      \
+	      }								      \
+									      \
+	    ++parts;							      \
+	    version <<= 8;						      \
+	    version |= here;						      \
+									      \
+	    if (*cp++ != '.')						      \
+	      /* Another part following?  */				      \
+	      break;							      \
+	  }								      \
+									      \
+	if (parts < 3)							      \
+	  version <<= 8 * (3 - parts);					      \
+									      \
+	/* Now we can test with the required version.  */		      \
+	if (version < __LINUX_KERNEL_VERSION)				      \
+	  /* Not sufficent.  */						      \
+	  FATAL ("FATAL: kernel too old\n");				      \
+      }									      \
+  } while (0)

sysdeps/unix/sysv/linux/init-first.c

@@ -24,10 +24,13 @@
 #include <sysdep.h>
 #include <fpu_control.h>
 #include <sys/param.h>
-#include <sys/sysctl.h>
 #include <sys/types.h>
 #include "kernel-features.h"
 
+#ifndef SHARED
+# include "dl-osinfo.h"
+#endif
+
 extern void __libc_init_secure (void);
 extern void __libc_init (int, char **, char **);
 extern void __libc_global_ctors (void);
@@ -69,68 +72,9 @@ init (int argc, char **argv, char **envp)
   /* Make sure we don't initialize twice.  */
   if (!__libc_multiple_libcs)
     {
-      /* Test whether the kernel is new enough.  This test is only
+#ifndef SHARED
-         performed if the library is not compiled to run on all
+      DL_SYSDEP_OSCHECK (__libc_fatal);
-         kernels.  */
+#endif
-      if (__LINUX_KERNEL_VERSION > 0)
-	{
-	  static const int sysctl_args[] = { CTL_KERN, KERN_OSRELEASE };
-	  char buf[64];
-	  size_t reslen = sizeof (buf);
-	  unsigned int version;
-	  int parts;
-	  char *cp;
-
-	  /* Try reading the number using `sysctl' first.  */
-	  if (__sysctl ((int *) sysctl_args,
-			sizeof (sysctl_args) / sizeof (sysctl_args[0]),
-			buf, &reslen, NULL, 0) < 0)
-	    {
-	      /* This was not successful.  Now try reading the /proc
-		 filesystem.  */
-	      int fd = __open ("/proc/sys/kernel/osrelease", O_RDONLY);
-	      if (fd == -1
-		  || (reslen = __read (fd, buf, sizeof (buf))) <= 0)
-		/* This also didn't work.  We give up since we cannot
-		   make sure the library can actually work.  */
-		__libc_fatal ("FATAL: cannot determine library version\n");
-
-	      __close (fd);
-	    }
-	  buf[MIN (reslen, sizeof (buf) - 1)] = '\0';
-
-	  /* Now convert it into a number.  The string consists of at most
-	     three parts.  */
-	  version = 0;
-	  parts = 0;
-	  cp = buf;
-	  while ((*cp >= '0') && (*cp <= '9'))
-	    {
-	      unsigned int here = *cp++ - '0';
-
-	      while ((*cp >= '0') && (*cp <= '9'))
-		{
-		  here *= 10;
-		  here += *cp++ - '0';
-		}
-
-	      ++parts;
-	      version <<= 8;
-	      version |= here;
-
-	      if (*cp++ != '.')
-		/* Another part following?  */
-		break;
-	    }
-
-	  if (parts < 3)
-	    version <<= 8 * (3 - parts);
-
-	  /* Now we can test with the required version.  */
-	  if (version < __LINUX_KERNEL_VERSION)
-	    /* Not sufficent.  */
-	    __libc_fatal ("FATAL: kernel too old\n");
-	}
 
       /* Set the FPU control word to the proper default value if the
 	 kernel would use a different value.  (In a static program we