Mercurialcrosstool-ng / file revision
summary | shortlog | changelog | graph | tags | branches | files | changeset | file | latest | revisions | annotate | diff | raw | help
patches/glibc/ports-2.10.1/340-dl_execstack-PaX-support.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Wed Dec 30 15:36:22 2009 +0100 (2009-12-30)
changeset 1669 61edd9d19e3c
permissions -rw-r--r--
scripts/functions: add aria2, a powerfull downloader

aria2 is a powerfull downloader that is capable of chunking and
parallel retrieval.

Due to li;itations in crosstool-NG retrieval facilities, it's not possible
to take fully advantage of aria2. It might happen that, in the future,
those limitations get lifted away, so we can take use features such as
parallel downloading from more than one server at the same time. For now,
it should still speed up downloads thanks to parallel downloading of chunks. 
     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

     4 	

     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).

     8 

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

    10 

    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;

    21  

    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;
crosstool-ng