freebsd kernel with SKQ
2515f10902
to the El Torito standard for CD booting, a CD may boot in "No emulation" mode without using a floppy image. In this mode, the BIOS loads a program off of the CD into memory and creates a BIOS device using 2048 byte sectors for the CD. According to the standard, this program can be up to 0xFFFF virtual (512-byte) sectors long. The old cdldr depended on this by having the BIOS load the entire loader and the small cdldr stub as one binary similar to pxeboot so that cdldr didn't have to read the CD to find the loader. However, the NT no emulation loader just uses 1 disk sector (4 virtual sectors), so it seems that at least some BIOS writers just did enough to get NT to boot by only loading 1 sector and ignoring the sector count. Thus, while cdldr should have worked in theory, it doesn't in practice. This replacment fits entirely in 1 sector and includes simple ISO 9660 support. It looks for /boot/loader on the CD and loads it up using the BIOS. This allows us to not have to depend on the limited size of floppy images but use a full GENERIC kernel for CD-ROM installs in the future, among other things. This version of cdboot is a bit bloated as it includes some useful debugging routines that people can pull to use in other x86 assembly modules. Even with all the debugging cruft, we still have 272 bytes to spare. |
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| bin | ||
| contrib | ||
| crypto | ||
| etc | ||
| games | ||
| gnu | ||
| include | ||
| kerberos5 | ||
| kerberosIV | ||
| lib | ||
| libexec | ||
| release | ||
| sbin | ||
| secure | ||
| share | ||
| sys | ||
| tools | ||
| usr.bin | ||
| usr.sbin | ||
| COPYRIGHT | ||
| Makefile | ||
| Makefile.inc1 | ||
| Makefile.upgrade | ||
| README | ||
| UPDATING | ||
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 ``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/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 have to build world before. More information is available in the handbook. The sample kernel configuration files reside in the sys/i386/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. 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. kerberosIV Kerberos package. lib System libraries. libexec System daemons. release Release building Makefile & associated tools. 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/handbook/synching.html