yann@1201: Original patch from: gentoo/src/patchsets/glibc/2.9/3000_all_2.3.6-dl_execstack-PaX-support.patch
yann@1201: 
yann@1201: -= BEGIN original header =-
yann@1201: 	With latest versions of glibc, a lot of apps failed on a PaX enabled
yann@1201: 	system with:
yann@1201: 		 cannot enable executable stack as shared object requires: Permission denied
yann@1201: 	
yann@1201: 	This is due to PaX 'exec-protecting' the stack, and ld.so then trying
yann@1201: 	to make the stack executable due to some libraries not containing the
yann@1201: 	PT_GNU_STACK section.  Bug #32960.  <azarah@gentoo.org> (12 Nov 2003).
yann@1201: 
yann@1201: 	Patch also NPTL. Bug #116086. <kevquinn@gentoo.org> (20 Dec 2005).
yann@1201: 
yann@1201: -= END original header =-
yann@1201: 
yann@1201: diff -durN glibc-2_9.orig/nptl/allocatestack.c glibc-2_9/nptl/allocatestack.c
yann@1201: --- glibc-2_9.orig/nptl/allocatestack.c	2008-08-16 00:35:27.000000000 +0200
yann@1201: +++ glibc-2_9/nptl/allocatestack.c	2009-02-02 22:01:20.000000000 +0100
yann@1201: @@ -299,7 +299,8 @@
yann@1201:  # error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP"
yann@1201:  #endif
yann@1201:    if (mprotect (stack, len, PROT_READ | PROT_WRITE | PROT_EXEC) != 0)
yann@1201: -    return errno;
yann@1201: +    if (errno != EACCES) /* PAX is enabled */
yann@1201: +    	return errno;
yann@1201:  
yann@1201:    return 0;
yann@1201:  }
yann@1201: diff -durN glibc-2_9.orig/sysdeps/unix/sysv/linux/dl-execstack.c glibc-2_9/sysdeps/unix/sysv/linux/dl-execstack.c
yann@1201: --- glibc-2_9.orig/sysdeps/unix/sysv/linux/dl-execstack.c	2006-01-08 09:21:15.000000000 +0100
yann@1201: +++ glibc-2_9/sysdeps/unix/sysv/linux/dl-execstack.c	2009-02-02 22:01:20.000000000 +0100
yann@1201: @@ -63,7 +63,10 @@
yann@1201:        else
yann@1201:  # endif
yann@1201:  	{
yann@1201: -	  result = errno;
yann@1201: +	  if (errno == EACCES)  /* PAX is enabled */
yann@1201: +	    result = 0;
yann@1201: +	  else
yann@1201: +	    result = errno;
yann@1201:  	  goto out;
yann@1201:  	}
yann@1201:      }
yann@1201: @@ -89,7 +92,12 @@
yann@1201:  	page -= size;
yann@1201:        else
yann@1201:  	{
yann@1201: -	  if (errno != ENOMEM)	/* Unexpected failure mode.  */
yann@1201: +	  if (errno == EACCES)		/* PAX is enabled */
yann@1201: +	    {
yann@1201: +	      result = 0;
yann@1201: +	      goto out;
yann@1201: +	    }
yann@1201: +	  else if (errno != ENOMEM)	/* Unexpected failure mode.  */
yann@1201:  	    {
yann@1201:  	      result = errno;
yann@1201:  	      goto out;
yann@1201: @@ -115,7 +123,12 @@
yann@1201:  	page += size;
yann@1201:        else
yann@1201:  	{
yann@1201: -	  if (errno != ENOMEM)	/* Unexpected failure mode.  */
yann@1201: +	  if (errno == EACCES)		/* PAX is enabled */
yann@1201: +	    {
yann@1201: +	      result = 0;
yann@1201: +	      goto out;
yann@1201: +	    }
yann@1201: +	  else if (errno != ENOMEM)	/* Unexpected failure mode.  */
yann@1201:  	    {
yann@1201:  	      result = errno;
yann@1201:  	      goto out;