poc/paxmark-libs: moved paxmark-libs branch into poc directory

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+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
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+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
diff --git a/poc/paxmark-libs/INSTALL b/poc/paxmark-libs/INSTALL
new file mode 100644
index 0000000..7d1c323
--- /dev/null
+++ b/poc/paxmark-libs/INSTALL
@@ -0,0 +1,365 @@
+Installation Instructions
+*************************
+
+Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002, 2004, 2005,
+2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+
+   Copying and distribution of this file, with or without modification,
+are permitted in any medium without royalty provided the copyright
+notice and this notice are preserved.  This file is offered as-is,
+without warranty of any kind.
+
+Basic Installation
+==================
+
+   Briefly, the shell commands `./configure; make; make install' should
+configure, build, and install this package.  The following
+more-detailed instructions are generic; see the `README' file for
+instructions specific to this package.  Some packages provide this
+`INSTALL' file but do not implement all of the features documented
+below.  The lack of an optional feature in a given package is not
+necessarily a bug.  More recommendations for GNU packages can be found
+in *note Makefile Conventions: (standards)Makefile Conventions.
+
+   The `configure' shell script attempts to guess correct values for
+various system-dependent variables used during compilation.  It uses
+those values to create a `Makefile' in each directory of the package.
+It may also create one or more `.h' files containing system-dependent
+definitions.  Finally, it creates a shell script `config.status' that
+you can run in the future to recreate the current configuration, and a
+file `config.log' containing compiler output (useful mainly for
+debugging `configure').
+
+   It can also use an optional file (typically called `config.cache'
+and enabled with `--cache-file=config.cache' or simply `-C') that saves
+the results of its tests to speed up reconfiguring.  Caching is
+disabled by default to prevent problems with accidental use of stale
+cache files.
+
+   If you need to do unusual things to compile the package, please try
+to figure out how `configure' could check whether to do them, and mail
+diffs or instructions to the address given in the `README' so they can
+be considered for the next release.  If you are using the cache, and at
+some point `config.cache' contains results you don't want to keep, you
+may remove or edit it.
+
+   The file `configure.ac' (or `configure.in') is used to create
+`configure' by a program called `autoconf'.  You need `configure.ac' if
+you want to change it or regenerate `configure' using a newer version
+of `autoconf'.
+
+   The simplest way to compile this package is:
+
+  1. `cd' to the directory containing the package's source code and type
+     `./configure' to configure the package for your system.
+
+     Running `configure' might take a while.  While running, it prints
+     some messages telling which features it is checking for.
+
+  2. Type `make' to compile the package.
+
+  3. Optionally, type `make check' to run any self-tests that come with
+     the package, generally using the just-built uninstalled binaries.
+
+  4. Type `make install' to install the programs and any data files and
+     documentation.  When installing into a prefix owned by root, it is
+     recommended that the package be configured and built as a regular
+     user, and only the `make install' phase executed with root
+     privileges.
+
+  5. Optionally, type `make installcheck' to repeat any self-tests, but
+     this time using the binaries in their final installed location.
+     This target does not install anything.  Running this target as a
+     regular user, particularly if the prior `make install' required
+     root privileges, verifies that the installation completed
+     correctly.
+
+  6. You can remove the program binaries and object files from the
+     source code directory by typing `make clean'.  To also remove the
+     files that `configure' created (so you can compile the package for
+     a different kind of computer), type `make distclean'.  There is
+     also a `make maintainer-clean' target, but that is intended mainly
+     for the package's developers.  If you use it, you may have to get
+     all sorts of other programs in order to regenerate files that came
+     with the distribution.
+
+  7. Often, you can also type `make uninstall' to remove the installed
+     files again.  In practice, not all packages have tested that
+     uninstallation works correctly, even though it is required by the
+     GNU Coding Standards.
+
+  8. Some packages, particularly those that use Automake, provide `make
+     distcheck', which can by used by developers to test that all other
+     targets like `make install' and `make uninstall' work correctly.
+     This target is generally not run by end users.
+
+Compilers and Options
+=====================
+
+   Some systems require unusual options for compilation or linking that
+the `configure' script does not know about.  Run `./configure --help'
+for details on some of the pertinent environment variables.
+
+   You can give `configure' initial values for configuration parameters
+by setting variables in the command line or in the environment.  Here
+is an example:
+
+     ./configure CC=c99 CFLAGS=-g LIBS=-lposix
+
+   *Note Defining Variables::, for more details.
+
+Compiling For Multiple Architectures
+====================================
+
+   You can compile the package for more than one kind of computer at the
+same time, by placing the object files for each architecture in their
+own directory.  To do this, you can use GNU `make'.  `cd' to the
+directory where you want the object files and executables to go and run
+the `configure' script.  `configure' automatically checks for the
+source code in the directory that `configure' is in and in `..'.  This
+is known as a "VPATH" build.
+
+   With a non-GNU `make', it is safer to compile the package for one
+architecture at a time in the source code directory.  After you have
+installed the package for one architecture, use `make distclean' before
+reconfiguring for another architecture.
+
+   On MacOS X 10.5 and later systems, you can create libraries and
+executables that work on multiple system types--known as "fat" or
+"universal" binaries--by specifying multiple `-arch' options to the
+compiler but only a single `-arch' option to the preprocessor.  Like
+this:
+
+     ./configure CC="gcc -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
+                 CXX="g++ -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
+                 CPP="gcc -E" CXXCPP="g++ -E"
+
+   This is not guaranteed to produce working output in all cases, you
+may have to build one architecture at a time and combine the results
+using the `lipo' tool if you have problems.
+
+Installation Names
+==================
+
+   By default, `make install' installs the package's commands under
+`/usr/local/bin', include files under `/usr/local/include', etc.  You
+can specify an installation prefix other than `/usr/local' by giving
+`configure' the option `--prefix=PREFIX', where PREFIX must be an
+absolute file name.
+
+   You can specify separate installation prefixes for
+architecture-specific files and architecture-independent files.  If you
+pass the option `--exec-prefix=PREFIX' to `configure', the package uses
+PREFIX as the prefix for installing programs and libraries.
+Documentation and other data files still use the regular prefix.
+
+   In addition, if you use an unusual directory layout you can give
+options like `--bindir=DIR' to specify different values for particular
+kinds of files.  Run `configure --help' for a list of the directories
+you can set and what kinds of files go in them.  In general, the
+default for these options is expressed in terms of `${prefix}', so that
+specifying just `--prefix' will affect all of the other directory
+specifications that were not explicitly provided.
+
+   The most portable way to affect installation locations is to pass the
+correct locations to `configure'; however, many packages provide one or
+both of the following shortcuts of passing variable assignments to the
+`make install' command line to change installation locations without
+having to reconfigure or recompile.
+
+   The first method involves providing an override variable for each
+affected directory.  For example, `make install
+prefix=/alternate/directory' will choose an alternate location for all
+directory configuration variables that were expressed in terms of
+`${prefix}'.  Any directories that were specified during `configure',
+but not in terms of `${prefix}', must each be overridden at install
+time for the entire installation to be relocated.  The approach of
+makefile variable overrides for each directory variable is required by
+the GNU Coding Standards, and ideally causes no recompilation.
+However, some platforms have known limitations with the semantics of
+shared libraries that end up requiring recompilation when using this
+method, particularly noticeable in packages that use GNU Libtool.
+
+   The second method involves providing the `DESTDIR' variable.  For
+example, `make install DESTDIR=/alternate/directory' will prepend
+`/alternate/directory' before all installation names.  The approach of
+`DESTDIR' overrides is not required by the GNU Coding Standards, and
+does not work on platforms that have drive letters.  On the other hand,
+it does better at avoiding recompilation issues, and works well even
+when some directory options were not specified in terms of `${prefix}'
+at `configure' time.
+
+Optional Features
+=================
+
+   If the package supports it, you can cause programs to be installed
+with an extra prefix or suffix on their names by giving `configure' the
+option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'.
+
+   Some packages pay attention to `--enable-FEATURE' options to
+`configure', where FEATURE indicates an optional part of the package.
+They may also pay attention to `--with-PACKAGE' options, where PACKAGE
+is something like `gnu-as' or `x' (for the X Window System).  The
+`README' should mention any `--enable-' and `--with-' options that the
+package recognizes.
+
+   For packages that use the X Window System, `configure' can usually
+find the X include and library files automatically, but if it doesn't,
+you can use the `configure' options `--x-includes=DIR' and
+`--x-libraries=DIR' to specify their locations.
+
+   Some packages offer the ability to configure how verbose the
+execution of `make' will be.  For these packages, running `./configure
+--enable-silent-rules' sets the default to minimal output, which can be
+overridden with `make V=1'; while running `./configure
+--disable-silent-rules' sets the default to verbose, which can be
+overridden with `make V=0'.
+
+Particular systems
+==================
+
+   On HP-UX, the default C compiler is not ANSI C compatible.  If GNU
+CC is not installed, it is recommended to use the following options in
+order to use an ANSI C compiler:
+
+     ./configure CC="cc -Ae -D_XOPEN_SOURCE=500"
+
+and if that doesn't work, install pre-built binaries of GCC for HP-UX.
+
+   On OSF/1 a.k.a. Tru64, some versions of the default C compiler cannot
+parse its `<wchar.h>' header file.  The option `-nodtk' can be used as
+a workaround.  If GNU CC is not installed, it is therefore recommended
+to try
+
+     ./configure CC="cc"
+
+and if that doesn't work, try
+
+     ./configure CC="cc -nodtk"
+
+   On Solaris, don't put `/usr/ucb' early in your `PATH'.  This
+directory contains several dysfunctional programs; working variants of
+these programs are available in `/usr/bin'.  So, if you need `/usr/ucb'
+in your `PATH', put it _after_ `/usr/bin'.
+
+   On Haiku, software installed for all users goes in `/boot/common',
+not `/usr/local'.  It is recommended to use the following options:
+
+     ./configure --prefix=/boot/common
+
+Specifying the System Type
+==========================
+
+   There may be some features `configure' cannot figure out
+automatically, but needs to determine by the type of machine the package
+will run on.  Usually, assuming the package is built to be run on the
+_same_ architectures, `configure' can figure that out, but if it prints
+a message saying it cannot guess the machine type, give it the
+`--build=TYPE' option.  TYPE can either be a short name for the system
+type, such as `sun4', or a canonical name which has the form:
+
+     CPU-COMPANY-SYSTEM
+
+where SYSTEM can have one of these forms:
+
+     OS
+     KERNEL-OS
+
+   See the file `config.sub' for the possible values of each field.  If
+`config.sub' isn't included in this package, then this package doesn't
+need to know the machine type.
+
+   If you are _building_ compiler tools for cross-compiling, you should
+use the option `--target=TYPE' to select the type of system they will
+produce code for.
+
+   If you want to _use_ a cross compiler, that generates code for a
+platform different from the build platform, you should specify the
+"host" platform (i.e., that on which the generated programs will
+eventually be run) with `--host=TYPE'.
+
+Sharing Defaults
+================
+
+   If you want to set default values for `configure' scripts to share,
+you can create a site shell script called `config.site' that gives
+default values for variables like `CC', `cache_file', and `prefix'.
+`configure' looks for `PREFIX/share/config.site' if it exists, then
+`PREFIX/etc/config.site' if it exists.  Or, you can set the
+`CONFIG_SITE' environment variable to the location of the site script.
+A warning: not all `configure' scripts look for a site script.
+
+Defining Variables
+==================
+
+   Variables not defined in a site shell script can be set in the
+environment passed to `configure'.  However, some packages may run
+configure again during the build, and the customized values of these
+variables may be lost.  In order to avoid this problem, you should set
+them in the `configure' command line, using `VAR=value'.  For example:
+
+     ./configure CC=/usr/local2/bin/gcc
+
+causes the specified `gcc' to be used as the C compiler (unless it is
+overridden in the site shell script).
+
+Unfortunately, this technique does not work for `CONFIG_SHELL' due to
+an Autoconf bug.  Until the bug is fixed you can use this workaround:
+
+     CONFIG_SHELL=/bin/bash /bin/bash ./configure CONFIG_SHELL=/bin/bash
+
+`configure' Invocation
+======================
+
+   `configure' recognizes the following options to control how it
+operates.
+
+`--help'
+`-h'
+     Print a summary of all of the options to `configure', and exit.
+
+`--help=short'
+`--help=recursive'
+     Print a summary of the options unique to this package's
+     `configure', and exit.  The `short' variant lists options used
+     only in the top level, while the `recursive' variant lists options
+     also present in any nested packages.
+
+`--version'
+`-V'
+     Print the version of Autoconf used to generate the `configure'
+     script, and exit.
+
+`--cache-file=FILE'
+     Enable the cache: use and save the results of the tests in FILE,
+     traditionally `config.cache'.  FILE defaults to `/dev/null' to
+     disable caching.
+
+`--config-cache'
+`-C'
+     Alias for `--cache-file=config.cache'.
+
+`--quiet'
+`--silent'
+`-q'
+     Do not print messages saying which checks are being made.  To
+     suppress all normal output, redirect it to `/dev/null' (any error
+     messages will still be shown).
+
+`--srcdir=DIR'
+     Look for the package's source code in directory DIR.  Usually
+     `configure' can determine that directory automatically.
+
+`--prefix=DIR'
+     Use DIR as the installation prefix.  *note Installation Names::
+     for more details, including other options available for fine-tuning
+     the installation locations.
+
+`--no-create'
+`-n'
+     Run the configure checks, but stop before creating any output
+     files.
+
+`configure' also accepts some other, not widely useful, options.  Run
+`configure --help' for more details.
+
diff --git a/poc/paxmark-libs/Makefile.am b/poc/paxmark-libs/Makefile.am
new file mode 100644
index 0000000..9edea4e
--- /dev/null
+++ b/poc/paxmark-libs/Makefile.am
@@ -0,0 +1,93 @@
+ACLOCAL_AMFLAGS = -I m4
+AM_CPPFLAGS = -DPLUGIN='"$(libdir)/libmypax.so"'
+
+bin_PROGRAMS = testpax testdlpax
+testpax_SOURCES = testpax.c
+testpax_LDFLAGS = -lmypax
+testdlpax_SOURCES = testdlpax.c
+testdlpax_LDFLAGS = -ldl
+
+lib_LTLIBRARIES = libmypax.la
+libmypax_la_SOURCES = libmypax.c
+
+check_SCRIPTS = poc.sh
+
+poc.sh:
+	@/sbin/ldconfig
+	@echo "================================================================================"
+	@echo "= TESTING DYNAMIC LINKING ======================================================"
+	@echo
+	@/sbin/paxctl -z $(libdir)/libmypax.so $(bindir)/testpax
+	@/sbin/paxctl -M $(libdir)/libmypax.so
+	@/sbin/paxctl -M $(bindir)/testpax
+	@/sbin/paxctl -Qv $(libdir)/libmypax.so $(bindir)/testpax 2>/dev/null
+	@echo
+	$(bindir)/testpax
+	@echo
+	@echo "========================================"
+	@echo
+	@/sbin/paxctl -z $(libdir)/libmypax.so $(bindir)/testpax
+	@/sbin/paxctl -m $(libdir)/libmypax.so
+	@/sbin/paxctl -M $(bindir)/testpax
+	@/sbin/paxctl -Qv $(libdir)/libmypax.so $(bindir)/testpax 2>/dev/null
+	@echo
+	$(bindir)/testpax
+	@echo
+	@echo "========================================"
+	@echo
+	@/sbin/paxctl -z $(libdir)/libmypax.so $(bindir)/testpax
+	@/sbin/paxctl -M $(libdir)/libmypax.so
+	@/sbin/paxctl -m $(bindir)/testpax
+	@/sbin/paxctl -Qv $(libdir)/libmypax.so $(bindir)/testpax 2>/dev/null
+	@echo
+	$(bindir)/testpax
+	@echo
+	@echo "========================================"
+	@echo
+	@/sbin/paxctl -z $(libdir)/libmypax.so $(bindir)/testpax
+	@/sbin/paxctl -m $(libdir)/libmypax.so
+	@/sbin/paxctl -m $(bindir)/testpax
+	@/sbin/paxctl -Qv $(libdir)/libmypax.so $(bindir)/testpax 2>/dev/null
+	@echo
+	$(bindir)/testpax
+	@echo
+	@echo
+	@echo "================================================================================"
+	@echo "= TESTING DLOPENING ============================================================"
+	@echo
+	@/sbin/paxctl -z $(libdir)/libmypax.so $(bindir)/testdlpax
+	@/sbin/paxctl -M $(libdir)/libmypax.so
+	@/sbin/paxctl -M $(bindir)/testdlpax
+	@/sbin/paxctl -Qv $(libdir)/libmypax.so $(bindir)/testdlpax 2>/dev/null
+	@echo
+	$(bindir)/testdlpax
+	@echo
+	@echo "========================================"
+	@echo
+	@/sbin/paxctl -z $(libdir)/libmypax.so $(bindir)/testdlpax
+	@/sbin/paxctl -m $(libdir)/libmypax.so
+	@/sbin/paxctl -M $(bindir)/testdlpax
+	@/sbin/paxctl -Qv $(libdir)/libmypax.so $(bindir)/testdlpax 2>/dev/null
+	@echo
+	$(bindir)/testdlpax
+	@echo
+	@echo "========================================"
+	@echo
+	@/sbin/paxctl -z $(libdir)/libmypax.so $(bindir)/testdlpax
+	@/sbin/paxctl -M $(libdir)/libmypax.so
+	@/sbin/paxctl -m $(bindir)/testdlpax
+	@/sbin/paxctl -Qv $(libdir)/libmypax.so $(bindir)/testdlpax 2>/dev/null
+	@echo
+	$(bindir)/testdlpax
+	@echo
+	@echo "========================================"
+	@echo
+	@/sbin/paxctl -z $(libdir)/libmypax.so $(bindir)/testdlpax
+	@/sbin/paxctl -m $(libdir)/libmypax.so
+	@/sbin/paxctl -m $(bindir)/testdlpax
+	@/sbin/paxctl -Qv $(libdir)/libmypax.so $(bindir)/testdlpax 2>/dev/null
+	@echo
+	$(bindir)/testdlpax
+	@echo
+	@echo "================================================================================"
+
diff --git a/poc/paxmark-libs/README b/poc/paxmark-libs/README
new file mode 100644
index 0000000..d8d2d8d
--- /dev/null
+++ b/poc/paxmark-libs/README
@@ -0,0 +1,23 @@
+
+This is POC to demonstrate the inheritance of MPROTECT PaX flag when
+a binary loads a library, either via normal dynamic linking or via dlopen.
+The binary/library are variously marked -M (enabled) or -m (disabled) MPROTECT.
+
+The library contains an RWX mmapping which is forbidden.  The binary just
+calls the library.
+
+What you need:
+
+	0. Preferrably do this on the One True Distro, hardened gentoo.
+	1. Run a pax enabled kernel with PAX_MPROTECT
+	2. Install sys-apps/paxctl
+
+How to use this 
+
+	0. ./autogen.sh to build the build system
+	1. ./configure to configure the build
+	2. make
+	3. sudo make install
+	4. sudo make check
+
+Enjoy the results which should be self explanatory.
diff --git a/poc/paxmark-libs/autogen.sh b/poc/paxmark-libs/autogen.sh
new file mode 100755
index 0000000..917d1a7
--- /dev/null
+++ b/poc/paxmark-libs/autogen.sh
@@ -0,0 +1,7 @@
+#!/bin/sh
+
+aclocal && \
+autoheader && \
+autoconf && \
+libtoolize --copy && \
+automake --add-missing --copy
diff --git a/poc/paxmark-libs/configure.ac b/poc/paxmark-libs/configure.ac
new file mode 100644
index 0000000..bedcbbb
--- /dev/null
+++ b/poc/paxmark-libs/configure.ac
@@ -0,0 +1,27 @@
+
+AC_PREREQ([2.68])
+AC_INIT([testpax],[0.1])
+AC_CONFIG_SRCDIR([testpax.c])
+AC_CONFIG_HEADERS([config.h])
+
+AM_INIT_AUTOMAKE([1.11 foreign])
+AM_SILENT_RULES([yes])
+
+LT_PREREQ([2.4])
+LT_INIT([dlopen])
+
+AC_CONFIG_MACRO_DIR([m4])
+
+# Checks for programs.
+AC_PROG_CC
+
+# Checks for libraries.
+
+# Checks for header files.
+
+# Checks for typedefs, structures, and compiler characteristics.
+
+# Checks for library functions.
+
+AC_CONFIG_FILES([Makefile])
+AC_OUTPUT
diff --git a/poc/paxmark-libs/libmypax.c b/poc/paxmark-libs/libmypax.c
new file mode 100644
index 0000000..a53b62e
--- /dev/null
+++ b/poc/paxmark-libs/libmypax.c
@@ -0,0 +1,11 @@
+#include <stdio.h>
+#include <sys/mman.h>
+#include <errno.h>
+#include <string.h>
+
+void
+doit() {
+	size_t m = (size_t) mmap( NULL, 4096, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0 );
+	if( m == (size_t) MAP_FAILED )
+        	printf("%s\n", strerror(errno));
+}
diff --git a/poc/paxmark-libs/testdlpax.c b/poc/paxmark-libs/testdlpax.c
new file mode 100644
index 0000000..fde3245
--- /dev/null
+++ b/poc/paxmark-libs/testdlpax.c
@@ -0,0 +1,17 @@
+#include <dlfcn.h>
+
+#ifndef PLUGIN
+#define PLUGIN "/usr/local/lib/libmypax.so"
+#endif
+
+int
+main() {
+	void *handle;
+	void (*doit)();
+
+	handle = dlopen(PLUGIN, RTLD_LAZY);
+	doit = dlsym(handle, "doit");
+	(*doit)();
+	dlclose(handle);
+	return 0;
+}
diff --git a/poc/paxmark-libs/testpax.c b/poc/paxmark-libs/testpax.c
new file mode 100644
index 0000000..dd1c0b7
--- /dev/null
+++ b/poc/paxmark-libs/testpax.c
@@ -0,0 +1,6 @@
+
+int
+main() {
+	doit();
+	return 0;
+}