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Roger Pau Monné 881c145431 elfnote: place note in a PT_NOTE program header 
Some tools (firecraker loader) only check for notes in PT_NOTE program
headers, so make sure the notes added using the ELFNOTE macro end up
in such header.

Output from readelf -Wl for and amd64 kernel after the change:

Elf file type is EXEC (Executable file)
Entry point 0xffffffff8038a000
There are 11 program headers, starting at offset 64

Program Headers:
  Type           Offset   VirtAddr           PhysAddr           FileSiz  MemSiz   Flg Align
  PHDR           0x000040 0xffffffff80200040 0x0000000000200040 0x000268 0x000268 R   0x8
  INTERP         0x0002a8 0xffffffff802002a8 0x00000000002002a8 0x00000d 0x00000d R   0x1
      [Requesting program interpreter: /red/herring]
  LOAD           0x000000 0xffffffff80200000 0x0000000000200000 0x189e28 0x189e28 R   0x200000
  LOAD           0x18a000 0xffffffff8038a000 0x000000000038a000 0xe447e8 0xe447e8 R E 0x200000
  LOAD           0xfce7f0 0xffffffff811ce7f0 0x00000000011ce7f0 0x6b955c 0x6b955c R   0x200000
  LOAD           0x1800000 0xffffffff81a00000 0x0000000001a00000 0x000140 0x000140 RW  0x200000
  LOAD           0x1801000 0xffffffff81a01000 0x0000000001a01000 0x1c8480 0x5ff000 RW  0x200000
  DYNAMIC        0x1800000 0xffffffff81a00000 0x0000000001a00000 0x000140 0x000140 RW  0x8
  GNU_RELRO      0x1800000 0xffffffff81a00000 0x0000000001a00000 0x000140 0x000140 R   0x1
  GNU_STACK      0x000000 0x0000000000000000 0x0000000000000000 0x000000 0x000000 RW  0
  NOTE           0x1687ae0 0xffffffff81887ae0 0x0000000001887ae0 0x0001c0 0x0001c0 R   0x4

 Section to Segment mapping:
  Segment Sections...
[...]
   10     .note.gnu.build-id .note.Xen

Reported by: cperciva
Fixes: 1a9cdd373a ('xen: add PV/PVH kernel entry point')
Fixes: 93ee134a24 ('Integrate support for xen in to i386 common code.')
Sponsored by: Citrix Systems R&D
Reviewed by: emaste
Differential revision: https://reviews.freebsd.org/D35611
2022-06-28 09:51:57 +02:00
.cirrus-ci Cirrus-CI: add some timing info on pkg install failure 2021-08-04 15:02:00 -04:00
.github .github: Add a build on Ubuntu 22.04 using llvm 14. 2022-06-09 10:20:03 -07:00
bin date: attempt to more accurately describe year limitations with -v 2022-06-27 22:54:13 -05:00
cddl zfs: merge openzfs/zfs@deb121309 2022-06-23 17:49:33 +02:00
contrib vendor/bc: update to upstream commit ca53adf83b7a 2022-06-22 15:56:01 +02:00
crypto OpenSSL: Merge OpenSSL 1.1.1p 2022-06-21 13:34:41 -04:00
etc testing: move atf-pytest-wrapper to /usr/libexec 2022-06-26 13:25:47 +00:00
gnu libdialog: Bump shared library version to 10. 2021-10-27 09:30:24 -07:00
include Fix memory allocation issue for BLAKE3 context 2022-06-21 14:32:09 -07:00
kerberos5 pkgbase: Create a FreeBSD-kerberos package 2021-09-07 10:23:14 +02:00
lib Bump .Dd for recently modified manual pages 2022-06-27 18:20:03 +02:00
libexec testing: workaround pytest parser bug in pytest-atf-wrapper. 2022-06-27 17:30:53 +00:00
release release: arm - increase IMAGE_SIZE 2022-06-22 14:23:39 -04:00
rescue Fix conflict between libnvpair and libnv when building rescue binaries. 2022-05-24 23:59:33 +03:00
sbin Correctly update fs_dsize in growfs(8) 2022-06-27 21:48:24 -07:00
secure OpenSSL: Regen manual pages for OpenSSL 1.1.1p 2022-06-21 14:22:28 -04:00
share Fix cross-builds from macOS 2022-06-27 10:22:12 -04:00
stand kboot: rename kexec_load to host_kexec_load 2022-06-27 14:54:45 -06:00
sys elfnote: place note in a PT_NOTE program header 2022-06-28 09:51:57 +02:00
targets bintrans: move files to a new directory 2022-04-18 10:53:11 +02:00
tests if_bridge tests: test adding interfaces with different MTU 2022-06-27 08:27:28 +02:00
tools stress2: Added two syzkaller reproducers 2022-06-25 08:40:20 +02:00
usr.bin Bump .Dd for recently modified manual pages 2022-06-27 18:20:03 +02:00
usr.sbin Bump .Dd for recently modified manual pages 2022-06-27 18:20:03 +02:00
.arcconfig Remove history.immutable from .arcconfig 2021-04-13 12:36:25 +01:00
.arclint arc lint: ignore /tests/ in chmod 2017-12-19 03:38:06 +00:00
.cirrus.yml Cirrus-CI: update image to FreeBSD 13.1 (latest release) 2022-06-02 15:25:36 -04:00
.clang-format clang-format: Add bitset loop macros 2021-09-21 12:08:01 -04:00
.gitattributes Add a basic clang-format configuration file 2019-06-07 15:23:52 +00:00
.gitignore gitignore: Ignore compile_commands.events.json 2022-05-30 10:43:25 -04:00
COPYRIGHT Welcome 2022, update copyrights. 2022-01-01 09:49:49 -07:00
LOCKS LOCKS: update current locks 2018-06-09 03:08:04 +00:00
MAINTAINERS Remove myself from bhyve maintenance; ENOTIME. 2021-11-19 07:09:30 +10:00
Makefile Switch to GCC 9 for the GCC tinderbox. 2022-05-20 10:16:57 -07:00
Makefile.inc1 amd64: add an i386 include directory 2022-06-13 18:35:38 +01:00
Makefile.libcompat Makefile.libcompat: Sort 2022-02-02 14:34:29 -07:00
Makefile.sys.inc AUTO_OBJ: For all top-level targets enforce using an OBJDIR. 2017-12-05 21:29:47 +00:00
ObsoleteFiles.inc ObsoleteFiles: flowtable header deleted in 2017 2022-06-27 12:31:36 -07:00
README.md README.md: update gnu directory description 2021-12-17 08:45:31 -05:00
RELNOTES RELNOTES: Add an entry for boottrace(4) 2022-03-29 13:35:14 +02:00
UPDATING LinuxKPI: move pm_message_t from kernel.h to pm.h 2022-06-10 14:05:12 +00:00

README.md

FreeBSD Source:

This is the top level of the FreeBSD source directory.

FreeBSD is an operating system used to power modern servers, desktops, and embedded platforms. A large community has continually developed it for more than thirty years. Its advanced networking, security, and storage features have made FreeBSD the platform of choice for many of the busiest web sites and most pervasive embedded networking and storage devices.

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), config(8), FreeBSD handbook on building userland, and Handbook for kernels for more information, including setting make(1) variables.

Source Roadmap:

Directory Description
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 Commands and libraries under the GNU General Public License (GPL) or Lesser General Public License (LGPL). Please see gnu/COPYING and gnu/COPYING.LIB 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.
stand Boot loader sources.
sys Kernel sources.
sys/arch/conf Kernel configuration files. GENERIC is the configuration used in release builds. NOTES contains documentation of all possible entries.
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 FreeBSD Handbook.