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patches/glibc/2.9/380-2.3.6-dl_execstack-PaX-support.patch
author Cody P Schafer <dev@codyps.com>
Mon May 12 00:02:13 2014 +0200 (2014-05-12)
changeset 3322 eb13867a034c
parent 1201 c9967a6e3b25
permissions -rw-r--r--
arch/powerpc: add powerpc64le support

Technically, I don't forbid powerpcle support either, but I'm not sure that
there is any library/compiler support for that at the moment (though the hw
technically makes it possible).

powerpc64le needs glibc 2.19 and gcc 4.9. I haven't looked into the support
tools, but at least gdb 7.5 is too old (7.7.1 definitely has support).

Also make powerpc64 non-experimental. It's practically old at this point.

Signed-off-by: Cody P Schafer <dev@codyps.com>
[yann.morin.1998@free.fr: use ${target_endian_le} and ${target_bits_64}]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Message-Id: <64bfbbced9dd8f62e0d6.1399801945@gun>
Patchwork-Id: 347775 
     1 Original patch from: gentoo/src/patchsets/glibc/2.9/3000_all_2.3.6-dl_execstack-PaX-support.patch

     2 

     3 -= BEGIN original header =-

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

     5 	system with:

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

     7 	

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

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

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

    11 

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

    13 

    14 -= END original header =-

    15 

    16 diff -durN glibc-2_9.orig/nptl/allocatestack.c glibc-2_9/nptl/allocatestack.c

    17 --- glibc-2_9.orig/nptl/allocatestack.c	2008-08-16 00:35:27.000000000 +0200

    18 +++ glibc-2_9/nptl/allocatestack.c	2009-02-02 22:01:20.000000000 +0100

    19 @@ -299,7 +299,8 @@

    20  # error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP"

    21  #endif

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

    23 -    return errno;

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

    25 +    	return errno;

    26  

    27    return 0;

    28  }

    29 diff -durN glibc-2_9.orig/sysdeps/unix/sysv/linux/dl-execstack.c glibc-2_9/sysdeps/unix/sysv/linux/dl-execstack.c

    30 --- glibc-2_9.orig/sysdeps/unix/sysv/linux/dl-execstack.c	2006-01-08 09:21:15.000000000 +0100

    31 +++ glibc-2_9/sysdeps/unix/sysv/linux/dl-execstack.c	2009-02-02 22:01:20.000000000 +0100

    32 @@ -63,7 +63,10 @@

    33        else

    34  # endif

    35  	{

    36 -	  result = errno;

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

    38 +	    result = 0;

    39 +	  else

    40 +	    result = errno;

    41  	  goto out;

    42  	}

    43      }

    44 @@ -89,7 +92,12 @@

    45  	page -= size;

    46        else

    47  	{

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

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

    50 +	    {

    51 +	      result = 0;

    52 +	      goto out;

    53 +	    }

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

    55  	    {

    56  	      result = errno;

    57  	      goto out;

    58 @@ -115,7 +123,12 @@

    59  	page += size;

    60        else

    61  	{

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

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

    64 +	    {

    65 +	      result = 0;

    66 +	      goto out;

    67 +	    }

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

    69  	    {

    70  	      result = errno;

    71  	      goto out;
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