freebsd kernel with SKQ
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trasz ae63a24a87 Don't call realpath(3) from libmap rtld code. This gets rid of a few calls
to fstatat(2) at binary startup; the difference looks like this:

--- przed       2017-10-14 13:55:49.983528000 +0100
+++ po  2017-10-14 14:10:39.134343000 +0100
@@ -1,15 +1,10 @@
 mmap(0x0,32768,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON,-1,0x0) = 34366173184 (0x800623000)
 issetugid()                                     = 0 (0x0)
-fstatat(AT_FDCWD,"/etc",{ mode=drwxr-xr-x ,inode=1364352,size=2560,blksize=32768 },AT_SYMLINK_NOFOLLOW) = 0 (0x0)
-fstatat(AT_FDCWD,"/etc/libmap.conf",{ mode=-rw-r--r-- ,inode=1373288,size=102,blksize=32768 },AT_SYMLINK_NOFOLLOW) = 0 (0x0)
 openat(AT_FDCWD,"/etc/libmap.conf",O_RDONLY|O_CLOEXEC,00) = 3 (0x3)
 fstat(3,{ mode=-rw-r--r-- ,inode=1373288,size=102,blksize=32768 }) = 0 (0x0)
 mmap(0x0,102,PROT_READ,MAP_PRIVATE,3,0x0)       = 34366205952 (0x80062b000)
 close(3)                                        = 0 (0x0)
-fstatat(AT_FDCWD,"/usr",{ mode=drwxr-xr-x ,inode=561792,size=512,blksize=32768 },AT_SYMLINK_NOFOLLOW) = 0 (0x0)
-fstatat(AT_FDCWD,"/usr/local",{ mode=drwxr-xr-x ,inode=561800,size=512,blksize=32768 },AT_SYMLINK_NOFOLLOW) = 0 (0x0)
-fstatat(AT_FDCWD,"/usr/local/etc",{ mode=drwxr-xr-x ,inode=653279,size=1536,blksize=32768 },AT_SYMLINK_NOFOLLOW) = 0 (0x0)
-fstatat(AT_FDCWD,"/usr/local/etc/libmap.d",0x7fffffffcf50,AT_SYMLINK_NOFOLLOW) ERR#2 'No such file or directory'
+open("/usr/local/etc/libmap.d",O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC,0165) ERR#2 'No such file or directory'
 munmap(0x80062b000,102)                                 = 0 (0x0)
 openat(AT_FDCWD,"/var/run/ld-elf.so.hints",O_RDONLY|O_CLOEXEC,00) = 3 (0x3)
 read(3,"Ehnt\^A\0\0\0\M^@\0\0\0\M-2\0\0"...,128) = 128 (0x80)

Reviewed by:	kib
MFC after:	2 weeks
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D12741
2017-10-22 10:32:40 +00:00
bin Undocument "tdnam" (leaving it as an alias), and rename the column 2017-10-09 13:53:41 +00:00
cddl Optimize zpool_read_all_labels with AIO 2017-10-12 21:25:11 +00:00
contrib Pull in r316035 from upstream llvm trunk (by Tim Northover): 2017-10-21 19:14:45 +00:00
crypto Upgrade to OpenSSH 7.5p1. 2017-08-04 12:57:24 +00:00
etc Remove a atrun check that is nullified by r318443. 2017-10-21 21:58:24 +00:00
gnu Support armv7 builds for userland 2017-10-05 23:01:33 +00:00
include dts: Update the Device Tree Sources to Linux 4.13 2017-10-21 15:18:20 +00:00
kerberos5 Replace the include path using CURDIR with KRB5DIR. This is consistent 2017-08-21 12:42:05 +00:00
lib After the import of libc++ 5.0.0, there is no need to disable building 2017-10-21 18:21:44 +00:00
libexec Don't call realpath(3) from libmap rtld code. This gets rid of a few calls 2017-10-22 10:32:40 +00:00
release Increase the arm/armv6 and arm/armv7 images from 2.5GB to 3GB, 2017-10-13 15:16:57 +00:00
rescue Remove rcmds. 2017-10-06 08:43:14 +00:00
sbin Return 'errno' value from the table_do_modify_record(), it is expected 2017-10-13 11:01:33 +00:00
secure Convert traditional ${MK_TESTS} conditional idiom for including test 2017-08-02 08:35:51 +00:00
share Regenerate src.conf(5) after r324340 (armv7 addition) 2017-10-22 07:36:28 +00:00
sys Remove the support for mknod(S_IFMT), which created dummy vnodes with 2017-10-22 08:11:45 +00:00
targets clean up remnants of removed GPL software 2017-10-13 18:30:32 +00:00
tests Add a test for r324671 along with some other masked tests. 2017-10-17 19:01:01 +00:00
tools Teach beinstall to use and prefer svnlite, with a fallback to svn. 2017-10-18 15:48:26 +00:00
usr.bin Import the latest CloudABI definitions, version 0.16. 2017-10-18 19:22:53 +00:00
usr.sbin bthidd: Fix leds on multireport keyboards broken after r297217 2017-10-19 20:42:46 +00:00
.arcconfig callsign isn't required anymore 2016-09-29 06:19:45 +00:00
.arclint
COPYRIGHT Bump copyright year. 2016-12-31 12:41:42 +00:00
LOCKS
MAINTAINERS Add asomers as a pjdfstest co-maintainer per the project status change 2017-06-28 09:25:15 +00:00
Makefile Support armv7 builds for userland 2017-10-05 23:01:33 +00:00
Makefile.inc1 Do not print error when running make check-old on system 2017-10-10 13:06:11 +00:00
Makefile.libcompat Support armv7 builds for userland 2017-10-05 23:01:33 +00:00
ObsoleteFiles.inc Remove mbpool(9) now that it has no consumers. 2017-10-18 00:18:03 +00:00
README Vendor import of OpenSSH 7.5p1. 2017-08-03 10:10:20 +00:00
README.md Remove hard line breaks from README.md 2017-03-01 15:39:58 +00:00
UPDATING Add note to updating about shifting LOADER_*SUPPORT options. 2017-10-22 03:52:26 +00:00

FreeBSD Source:

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. See build(7) and 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. See build(7), config(8), and http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html for more information.

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 kernel configuration files reside in the sys/<arch>/conf sub-directory. GENERIC is the default configuration used in release builds. NOTES contains entries and documentation for all possible devices, not just those commonly used.

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.

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.

tests			Regression tests which can be run by Kyua.  See tests/README
				for additional information.

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