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Konstantin Belousov 4648ba0a0f Make mmap(MAP_STACK) search for the available address space, similar
to !MAP_STACK mapping requests.  For MAP_STACK | MAP_FIXED, clear any
mappings which could previously exist in the used range.

For this, teach vm_map_find() and vm_map_fixed() to handle
MAP_STACK_GROWS_DOWN or _UP cow flags, by calling a new
vm_map_stack_locked() helper, which is factored out from
vm_map_stack().

The side effect of the change is that MAP_STACK started obeying
MAP_ALIGNMENT and MAP_32BIT flags.

Reported by:	rwatson
Reviewed by:	alc
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
2014-06-09 03:37:41 +00:00
bin In preparation for ASLR [1] support add WITH_PIE to support building with -fPIE. 2014-06-08 17:29:31 +00:00
cddl MFV r266766: 2014-05-27 19:46:11 +00:00
contrib Fix incorrect error handling in PAM policy parser. [SA-14:13] 2014-06-03 19:01:38 +00:00
crypto Fix OpenSSL multiple vulnerabilities. 2014-06-05 12:32:16 +00:00
etc Move atf-sh from /usr/bin/ to /usr/libexec/ 2014-06-06 18:58:06 +00:00
games Use src.opts.mk in preference to bsd.own.mk except where we need stuff 2014-05-06 04:22:01 +00:00
gnu In preparation for ASLR [1] support add WITH_PIE to support building with -fPIE. 2014-06-08 17:29:31 +00:00
include Fix strcasecmp_l() and strncasecmp_l() POSIX 2008 compliance. 2014-05-30 01:09:07 +00:00
kerberos5 In preparation for ASLR [1] support add WITH_PIE to support building with -fPIE. 2014-06-08 17:29:31 +00:00
lib In preparation for ASLR [1] support add WITH_PIE to support building with -fPIE. 2014-06-08 17:29:31 +00:00
libexec In preparation for ASLR [1] support add WITH_PIE to support building with -fPIE. 2014-06-08 17:29:31 +00:00
release Add vte(4) to the hardware notes. 2014-06-06 19:10:23 +00:00
rescue Minor style nits... 2014-05-23 00:20:57 +00:00
sbin In preparation for ASLR [1] support add WITH_PIE to support building with -fPIE. 2014-06-08 17:29:31 +00:00
secure Switch using the new $2b$ format by default, when bcrypt is used. 2014-05-14 00:50:31 +00:00
share Regen after r267233 2014-06-08 17:33:37 +00:00
sys Make mmap(MAP_STACK) search for the available address space, similar 2014-06-09 03:37:41 +00:00
tests Fix unintended KBI change from r264905. Add _fib versions of 2014-05-29 21:03:49 +00:00
tools In preparation for ASLR [1] support add WITH_PIE to support building with -fPIE. 2014-06-08 17:29:31 +00:00
usr.bin In preparation for ASLR [1] support add WITH_PIE to support building with -fPIE. 2014-06-08 17:29:31 +00:00
usr.sbin acpiconf(8): document 'k' option 2014-06-09 01:54:00 +00:00
.arcconfig Prevent arc commands from overwriting history 2014-06-06 08:05:34 +00:00
.arclint arc: add linting for python files 2014-06-02 00:21:42 +00:00
COPYRIGHT Bump copyright year. 2013-12-31 12:18:10 +00:00
LOCKS Explicitly require Security Officer's approval for kernel PRNG bits. 2013-09-17 14:19:05 +00:00
MAINTAINERS This should have been obvious, but make it so. 2014-04-06 16:48:00 +00:00
Makefile grep -L returns non-zero status if none of the files had the pattern 2014-05-10 16:39:08 +00:00
Makefile.inc1 In preparation for ASLR [1] support add WITH_PIE to support building with -fPIE. 2014-06-08 17:29:31 +00:00
ObsoleteFiles.inc Don't delete our new vt(4) man page. 2014-05-22 16:30:32 +00:00
README Add the cddl/ directory. 2010-11-14 11:32:56 +00:00
UPDATING Move atf-sh from /usr/bin/ to /usr/libexec/ 2014-06-06 18:58:06 +00:00

This is the top level of the FreeBSD source directory.  This file
was last revised on:
$FreeBSD$

For copyright information, please see the file COPYRIGHT in this
directory (additional copyright information also exists for some
sources in this tree - please see the specific source directories for
more information).

The Makefile in this directory supports a number of targets for
building components (or all) of the FreeBSD source tree, the most
commonly used one being ``world'', which rebuilds and installs
everything in the FreeBSD system from the source tree except the
kernel, the kernel-modules and the contents of /etc.  The ``world''
target should only be used in cases where the source tree has not
changed from the currently running version.  See:
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html
for more information, including setting make(1) variables.

The ``buildkernel'' and ``installkernel'' targets build and install
the kernel and the modules (see below).  Please see the top of
the Makefile in this directory for more information on the
standard build targets and compile-time flags.

Building a kernel is a somewhat more involved process, documentation
for which can be found at:
   http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html
And in the config(8) man page.
Note: If you want to build and install the kernel with the
``buildkernel'' and ``installkernel'' targets, you might need to build
world before.  More information is available in the handbook.

The sample kernel configuration files reside in the sys/<arch>/conf
sub-directory (assuming that you've installed the kernel sources), the
file named GENERIC being the one used to build your initial installation
kernel.  The file NOTES contains entries and documentation for all possible
devices, not just those commonly used.  It is the successor of the ancient
LINT file, but in contrast to LINT, it is not buildable as a kernel but a
pure reference and documentation file.


Source Roadmap:
---------------
bin		System/user commands.

cddl		Various commands and libraries under the Common Development
		and Distribution License.

contrib		Packages contributed by 3rd parties.

crypto		Cryptography stuff (see crypto/README).

etc		Template files for /etc.

games		Amusements.

gnu		Various commands and libraries under the GNU Public License.
		Please see gnu/COPYING* for more information.

include		System include files.

kerberos5	Kerberos5 (Heimdal) package.

lib		System libraries.

libexec		System daemons.

release		Release building Makefile & associated tools.

rescue		Build system for statically linked /rescue utilities.

sbin		System commands.

secure		Cryptographic libraries and commands.

share		Shared resources.

sys		Kernel sources.

tools		Utilities for regression testing and miscellaneous tasks.

usr.bin		User commands.

usr.sbin	System administration commands.


For information on synchronizing your source tree with one or more of
the FreeBSD Project's development branches, please see:

  http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/synching.html