lib/ct-ng-1.13.4/patches/glibc/2.9/380-2.3.6-dl_execstack-PaX-support.patch

Original patch from: gentoo/src/patchsets/glibc/2.9/3000_all_2.3.6-dl_execstack-PaX-support.patch

-= BEGIN original header =-
	With latest versions of glibc, a lot of apps failed on a PaX enabled
	system with:
		 cannot enable executable stack as shared object requires: Permission denied
	
	This is due to PaX 'exec-protecting' the stack, and ld.so then trying
	to make the stack executable due to some libraries not containing the
	PT_GNU_STACK section.  Bug #32960.  <azarah@gentoo.org> (12 Nov 2003).

	Patch also NPTL. Bug #116086. <kevquinn@gentoo.org> (20 Dec 2005).

-= END original header =-

diff -durN glibc-2_9.orig/nptl/allocatestack.c glibc-2_9/nptl/allocatestack.c
--- glibc-2_9.orig/nptl/allocatestack.c	2008-08-16 00:35:27.000000000 +0200
+++ glibc-2_9/nptl/allocatestack.c	2009-02-02 22:01:20.000000000 +0100
@@ -299,7 +299,8 @@
 # error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP"
 #endif
   if (mprotect (stack, len, PROT_READ | PROT_WRITE | PROT_EXEC) != 0)
-    return errno;
+    if (errno != EACCES) /* PAX is enabled */
+    	return errno;
 
   return 0;
 }
diff -durN glibc-2_9.orig/sysdeps/unix/sysv/linux/dl-execstack.c glibc-2_9/sysdeps/unix/sysv/linux/dl-execstack.c
--- glibc-2_9.orig/sysdeps/unix/sysv/linux/dl-execstack.c	2006-01-08 09:21:15.000000000 +0100
+++ glibc-2_9/sysdeps/unix/sysv/linux/dl-execstack.c	2009-02-02 22:01:20.000000000 +0100
@@ -63,7 +63,10 @@
       else
 # endif
 	{
-	  result = errno;
+	  if (errno == EACCES)  /* PAX is enabled */
+	    result = 0;
+	  else
+	    result = errno;
 	  goto out;
 	}
     }
@@ -89,7 +92,12 @@
 	page -= size;
       else
 	{
-	  if (errno != ENOMEM)	/* Unexpected failure mode.  */
+	  if (errno == EACCES)		/* PAX is enabled */
+	    {
+	      result = 0;
+	      goto out;
+	    }
+	  else if (errno != ENOMEM)	/* Unexpected failure mode.  */
 	    {
 	      result = errno;
 	      goto out;
@@ -115,7 +123,12 @@
 	page += size;
       else
 	{
-	  if (errno != ENOMEM)	/* Unexpected failure mode.  */
+	  if (errno == EACCES)		/* PAX is enabled */
+	    {
+	      result = 0;
+	      goto out;
+	    }
+	  else if (errno != ENOMEM)	/* Unexpected failure mode.  */
 	    {
 	      result = errno;
 	      goto out;