Update.

2003-11-26  Ulrich Drepper  <drepper@redhat.com>

	* sysdeps/unix/sysv/linux/kernel-features.h
	(__ASSUME_PROT_GROWSUPDOWN): Define for 2.6.1 and up.
	* sysdeps/unix/sysv/linux/dl-execstack.c: Omit compatibility code
	if __ASSUME_PROT_GROWSUPDOWN is defined.

2003-11-26  Andreas Jaeger  <aj@suse.de>

	* sysdeps/unix/sysv/linux/dl-execstack.c
	(_dl_make_stack_executable): Set dl_stack_flags always for
	success.

ChangeLog

@@ -1,3 +1,16 @@
+2003-11-26  Ulrich Drepper  <drepper@redhat.com>
+
+	* sysdeps/unix/sysv/linux/kernel-features.h
+	(__ASSUME_PROT_GROWSUPDOWN): Define for 2.6.1 and up.
+	* sysdeps/unix/sysv/linux/dl-execstack.c: Omit compatibility code
+	if __ASSUME_PROT_GROWSUPDOWN is defined.
+
+2003-11-26  Andreas Jaeger  <aj@suse.de>
+
+	* sysdeps/unix/sysv/linux/dl-execstack.c
+	(_dl_make_stack_executable): Set dl_stack_flags always for
+	success.
+
 2003-06-22  Petter Reinholdtsen  <pere@hungry.com>
 
 	* locale/program/ld-monetary.c: Only check the first three

nptl/pthread_attr_destroy.c

@@ -22,7 +22,7 @@
 #include <string.h>
 #include <unistd.h>
 #include "pthreadP.h"
-
+#include <shlib-compat.h>
 
 int
 __pthread_attr_destroy (attr)
@@ -33,6 +33,13 @@ __pthread_attr_destroy (attr)
   assert (sizeof (*attr) >= sizeof (struct pthread_attr));
   iattr = (struct pthread_attr *) attr;
 
+#if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_1)
+  /* In old struct pthread_attr, neither next nor cpuset are
+     present.  */
+  if (__builtin_expect ((iattr->flags & ATTR_FLAG_OLDATTR), 0))
+    return 0;
+#endif
+
   /* Enqueue the attributes to the list of all known variables.  */
   if (DEBUGGING_P)
     {

nptl/pthread_attr_init.c

@@ -80,12 +80,16 @@ __pthread_attr_init_2_0 (attr)
     int inheritsched;
     int scope;
   };
+  struct pthread_attr *iattr;
 
   /* Many elements are initialized to zero so let us do it all at
      once.  This also takes care of clearing the bytes which are not
      internally used.  */
   memset (attr, '\0', sizeof (struct old_attr));
 
+  iattr = (struct pthread_attr *) attr;
+  iattr->flags |= ATTR_FLAG_OLDATTR;
+
   /* We cannot enqueue the attribute because that member is not in the
      old attribute structure.  */
   return 0;

nptl/sysdeps/unix/sysv/linux/internaltypes.h

@@ -47,6 +47,7 @@ struct pthread_attr
 #define ATTR_FLAG_NOTINHERITSCHED	0x0002
 #define ATTR_FLAG_SCOPEPROCESS		0x0004
 #define ATTR_FLAG_STACKADDR		0x0008
+#define ATTR_FLAG_OLDATTR		0x0010
 
 
 /* Mutex attribute data structure.  */

sysdeps/unix/sysv/linux/dl-execstack.c

@@ -23,6 +23,9 @@
 #include <stdbool.h>
 #include <stackinfo.h>
 
+#include "kernel-features.h"
+
+
 extern void *__libc_stack_end;
 
 int
@@ -35,15 +38,20 @@ _dl_make_stack_executable (void)
 
   /* Newer Linux kernels support a flag to make our job easy.  */
 # ifdef PROT_GROWSDOWN
+#  if __ASSUME_PROT_GROWSUPDOWN == 0
   static bool no_growsdown;
   if (! no_growsdown)
+#  endif
     {
       if (__mprotect ((void *) page, GL(dl_pagesize),
 		      PROT_READ|PROT_WRITE|PROT_EXEC|PROT_GROWSDOWN) == 0)
-	return 0;
-      if (errno != EINVAL)
+	goto return_success;
+#  if __ASSUME_PROT_GROWSUPDOWN == 0
+      if (errno == EINVAL)
+	no_growsdown = true;
+      else
+#  endif
 	return errno;
-      no_growsdown = true;
     }
 # endif
 
@@ -54,6 +62,7 @@ _dl_make_stack_executable (void)
      We start with a random guess at how deep the stack might have gotten
      so as to have extended the GROWSDOWN mapping to lower pages.  */
 
+# if __ASSUME_PROT_GROWSUPDOWN == 0
   size_t size = GL(dl_pagesize) * 8;
   page = page + GL(dl_pagesize) - size;
   while (1)
@@ -78,6 +87,7 @@ _dl_make_stack_executable (void)
 	  page += size;
 	}
     }
+# endif
 
 #elif _STACK_GROWS_UP
 
@@ -86,15 +96,20 @@ _dl_make_stack_executable (void)
 
   /* Newer Linux kernels support a flag to make our job easy.  */
 # ifdef PROT_GROWSUP
+#  if __ASSUME_PROT_GROWSUPDOWN == 0
   static bool no_growsup;
   if (! no_growsup)
+#  endif
     {
       if (__mprotect ((void *) page, GL(dl_pagesize),
 		      PROT_READ|PROT_WRITE|PROT_EXEC|PROT_GROWSUP) == 0)
-	return 0;
-      if (errno != EINVAL)
+	goto return_success;
+#  if __ASSUME_PROT_GROWSUPDOWN == 0
+      if (errno == EINVAL)
+	no_growsup = true;
+      else
+#  endif
 	return errno;
-      no_growsup = true;
     }
 # endif
 
@@ -105,6 +120,7 @@ _dl_make_stack_executable (void)
      We start with a random guess at how deep the stack might have gotten
      so as to have extended the GROWSUP mapping to higher pages.  */
 
+# if __ASSUME_PROT_GROWSUPDOWN == 0
   size_t size = GL(dl_pagesize) * 8;
   while (1)
     {
@@ -127,11 +143,13 @@ _dl_make_stack_executable (void)
 	  size /= 2;
 	}
     }
+# endif
 
 #else
 # error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP"
 #endif
 
+ return_success:
   /* Remember that we changed the permission.  */
   GL(dl_stack_flags) |= PF_X;
 

sysdeps/unix/sysv/linux/kernel-features.h

@@ -376,6 +376,12 @@
 
 /* The fixed version of the posix_fadvise64 syscall appeared in
    2.6.0-test3.  At least for x86.  */
-#if __LINUX_KERNEL_VERSION >= 132609 && (defined __i386__)
+#if __LINUX_KERNEL_VERSION >= 132609 && defined __i386__
 # define __ASSUME_FADVISE64_64_SYSCALL	1
 #endif
+
+/* The PROT_GROWSDOWN/PROT_GROWSUP flags were introduced in the 2.6.0-test
+   series.  */
+#if __LINUX_KERNEL_VERSION >= 132609
+# define __ASSUME_PROT_GROWSUPDOWN	1
+#endif