crosstool-ng: patches/glibc/ports-2.10.1/340-dl_execstack-PaX-support.patch@366bd2b22675

     1 	With latest versions of glibc, a lot of apps failed on a PaX enabled

     2 	system with:

     3 		 cannot enable executable stack as shared object requires: Permission denied

     5 	This is due to PaX 'exec-protecting' the stack, and ld.so then trying

     6 	to make the stack executable due to some libraries not containing the

     7 	PT_GNU_STACK section.  Bug #32960.  <azarah@gentoo.org> (12 Nov 2003).

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

    11 diff -durN glibc-2.10.1.orig/nptl/allocatestack.c glibc-2.10.1/nptl/allocatestack.c

    12 --- glibc-2.10.1.orig/nptl/allocatestack.c	2009-01-29 21:34:16.000000000 +0100

    13 +++ glibc-2.10.1/nptl/allocatestack.c	2009-11-13 00:50:33.000000000 +0100

    14 @@ -326,7 +326,8 @@

    15  # error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP"

    16  #endif

    17    if (mprotect (stack, len, PROT_READ | PROT_WRITE | PROT_EXEC) != 0)

    18 -    return errno;

    19 +    if (errno != EACCES) /* PAX is enabled */

    20 +    	return errno;

    22    return 0;

    23  }

    24 diff -durN glibc-2.10.1.orig/sysdeps/unix/sysv/linux/dl-execstack.c glibc-2.10.1/sysdeps/unix/sysv/linux/dl-execstack.c

    25 --- glibc-2.10.1.orig/sysdeps/unix/sysv/linux/dl-execstack.c	2006-01-08 09:21:15.000000000 +0100

    26 +++ glibc-2.10.1/sysdeps/unix/sysv/linux/dl-execstack.c	2009-11-13 00:50:33.000000000 +0100

    27 @@ -63,7 +63,10 @@

    28        else

    29  # endif

    30  	{

    31 -	  result = errno;

    32 +	  if (errno == EACCES)  /* PAX is enabled */

    33 +	    result = 0;

    34 +	  else

    35 +	    result = errno;

    36  	  goto out;

    37  	}

    38      }

    39 @@ -89,7 +92,12 @@

    40  	page -= size;

    41        else

    42  	{

    43 -	  if (errno != ENOMEM)	/* Unexpected failure mode.  */

    44 +	  if (errno == EACCES)		/* PAX is enabled */

    45 +	    {

    46 +	      result = 0;

    47 +	      goto out;

    48 +	    }

    49 +	  else if (errno != ENOMEM)	/* Unexpected failure mode.  */

    50  	    {

    51  	      result = errno;

    52  	      goto out;

    53 @@ -115,7 +123,12 @@

    54  	page += size;

    55        else

    56  	{

    57 -	  if (errno != ENOMEM)	/* Unexpected failure mode.  */

    58 +	  if (errno == EACCES)		/* PAX is enabled */

    59 +	    {

    60 +	      result = 0;

    61 +	      goto out;

    62 +	    }

    63 +	  else if (errno != ENOMEM)	/* Unexpected failure mode.  */

    64  	    {

    65  	      result = errno;

    66  	      goto out;

author	Arnaud Lacombe <lacombar@gmail.com>
	Thu Aug 05 17:59:51 2010 +0200 (2010-08-05)
changeset 2069	366bd2b22675
permissions	-rw-r--r--