Commit Graph

72 Commits

Author SHA1 Message Date
Luigi Rizzo
df52a87993 A number of small changes to make the 'save choice to disk' safer,
and re-enable it as default.

In particular:

+ re-enable the 'update' flag in the Makefile (of course!);

+ commit Warner's patch "orb $NOUPDATE,_FLAGS(%bp)"
  to avoid writing to disk in case of a timeout/default choice;

+ fix an off-by-one count in the partition scan code that would
  print the wrong name for unknown partitions;

+ unconditionally change the boot prompt to 'Boot:' instead of 'Default:'
  to make room for the extra code/checks/messages. Some of the changes
  listed below are also made to save space;

+ rearrange and fix comments for known partition types. Right now we
  explicitly recognise *BSD, Linux, FAT16 (type 6, used on many USB keys),
  NTFS (type 7), FAT32 (type 11).
  Depending on other options we also recognise Extended (type 5),
  FAT12 (type 1) and FAT16 < 32MB (type 4).

+ Add an entry "F6 PXE" when the code is built with -DPXE (which is
  a default now). Technically, F6 boots through INT18, so the prompt 'PXE'
  is a bit misleading. Unfortunately the name INT18
  is too long and does not fit in - we could use ROM perhaps.
  The reason I picked 'PXE' is that on many (I believe) new systems
  INT18 calls PXE.

Apart from the choice of the name for PXE/ROM/INT18, this should close
pending issues on the 1-sector boot0 code and we should be able to
move the code to RELENG_7 when it reopens.

No boot0cfg changes are necessary.

MFC after:	3 weeks
2008-12-30 09:40:50 +00:00
Maxim Sobolev
a6d94c502c Fix typo in the comment %is -> %si. 2008-12-08 20:53:27 +00:00
Luigi Rizzo
ae3096705c Another, hopefully final set of changes to boot0 and boot0cfg.
boot0.S changes:

+ import a patch from Christoph Mallon to rearrange the various
  print functions and save another couple of bytes;

+ implement the suggestion in PR 70531 to enable booting from
  any valid partition because even the extended partitions that
  were previously in our kill list may contain a valid boot loader.
  This simplifies the code and saves some bytes;

+ followwing up PR 127764, implement conditional code to preserve
  the 'Volume ID' which might be used by other OS (NT, XP, Vista)
  and is located at offset 0x1b8. This requires a relocation of the
  parameter block within the boot sector -- there is no other
  possible workaround.
  To address this, boot0cfg has been updated to handle both
  versions of the boot code;

+ slightly rearrange the strings printed in the menus to make
  the code buildable with all options. Given the tight memory
  budget, this means that with certain options we need to
  shrink or remove certain labels.

and especially:

	make -DVOLUME_LABEL -DPXE the default options.

  This means that the newly built boot0 block will preserve the
  Volume ID, and has the (hidden) option F6 to boot from INT18/PXE.
  I think the extra functionality is well worth the change.

  The most visible difference here is that the 'Default: ' string
  now becomes 'Boot: ' (it can be reverted to the old value
  but then we need to nuke 1/2 partition name or entries to
  make up for the extra room).

boot0cfg changes:

+ modify the code to recognise the new boot0 structure (with the
  relocated options block to make room for the Volume id).

+ add two options, '-i xxxx-xxxx' to set the volume ID, -e c
  to modify the character printed in case of bad input

PR:		127764 70531
Submitted by:	Christoph Mallon (portions)
MFC after:	4 weeks
2008-12-03 14:53:59 +00:00
Luigi Rizzo
4b91bf7948 This commits brings in a lot of documentation and some enhancement
of the boot0.S code, with a number of compile-time selectable options,
the most interesting one being the ability to select PXE booting.

The code is completely compatible with the previous one, and with
the boot0cfg program. Even the actual code is largely unmodified,
with only minor rearrangements or fixes to make room for the new
features.

The behaviour of the standard build differs from the previous
version in the following, minor things:

+ 'noupdate' is the default, which means the code does not
  write back the selection to disk. You can enable the feature
  at runtime with boot0cfg, or changing the flags in the Makefile.

+ a drive number of 0x00 (floppy, or USB in floppy emulation) is
  now accepted as valid. Previously, it was overridden with 0x80,
  meaning that the partition table coming from the media was
  used to access sectors on a possibly different media.
  You can revert to the previous mode building with -DCHECK_DRIVE,
  and you can always use the 'setdrv' option in boot0cfg

+ certain FAT or NTFS partitions are listed as WIN instead of DOS.

+ the 'bel' character on a bad selection is replaced by a '#' to
  make it clear that the system is not hang even if the machine
  does not have a speaker. This can be reverted back at compile
  time, or at runtime with an upcoming boot0cfg option.

Additional features are available as compile time options,
and may be become the default if deemed useful. In particular:

+ INT18/PXE boot (make -DPXE)
  This option enables booting through INT 18h (which on certain
  BIOSes can be hooked to PXE) by pressing F6. There is unfortunately
  no room to print the additional menu option.
  Also, to make room for the code, the 'Default: ' string is
  changed to 'Boot: '

+ print current drive number (make -DTEST)
  Prints a line indicating the current drive number.
  This is useful to figure out what is going on for machines/bioses
  which remap drives in sometimes surprising ways.

+ disable numeric keys in console mode (make -DONLY_F_KEYS)
  Not really a significant option, but it is needed to make
  room for the -DTEST mode.

+ disable floppy support (make -DCHECK_DRIVE)
  Revert to the old behaviour of only accepting 0x80 and above
  as valid drive numbers.

MFC after:	6 weeks
2008-12-02 14:57:48 +00:00
Luigi Rizzo
86d6c2d4b9 Fix a typo in previous commit: must call "putn" to print a crlf,
instead of "puts" which prints whatever is at %si, followed by a CRLF.

It was not noticed during tests because at that point %si points
to a partition entry whose first byte is 0x80, which is both a
terminator for the string and a non printable character.

Submitted by:	Christoph Mallon
2008-11-26 21:38:43 +00:00
Luigi Rizzo
54dd5ca200 Pass the pointer to the selected partition in %si to the next stage
boot code. The bug was introduced in rev.1.13, and went unnoticed
because FreeBSD's boot1 does not use it, but other systems might.

(I have been struggling for almost a full day trying to figure out
why a syslinux'ed partition would not boot when started with the
FreeBSD /boot/boot0, only to realize that the bug was ours!)

The space for the two extra bytes (push %si and pop %si) is reclaimed
by removing an extra CRLF that is printed before booting.

The bug is not a major one but if there is time it might be a good
thing to merge it into the upcoming releases.
2008-11-26 18:01:21 +00:00
Thomas Quinot
9068c00114 Fix setting of serial port speed. A junk value was passed in AX when
bioscom is called to set up serial port parameters because COMSPEED
was treated as an address instead of an immediate value, causing
serial port parameters to never be set.

PR:		i386/110828
Reviewed by:	jhb
MFC after:	2 weeks
2007-03-26 21:56:13 +00:00
John Baldwin
cde0d87b26 Restore the pre-5.x behavior of only beeping if the user makes a bad
selection and not always beeping on startup.  The two bytes for the extra
'jmp' instruction were obtained by removing recognition of BSD/OS
partitions.

Requested by:	many
Tested by:	subset of many
Head nod:	imp, keramida
MFC after:	2 weeks
2006-05-03 13:43:46 +00:00
Ruslan Ermilov
e2bc0fb2ea Allow BOOT_BOOT0_COMCONSOLE_SPEED to be derived from BOOT_COMCONSOLE_SPEED
at compile time.
2005-04-25 17:41:35 +00:00
Dag-Erling Smørgrav
d04928f224 Remove type 0x4 (FAT12 <32MB) to make room for type 0x7 (NTFS). 2005-02-08 20:43:04 +00:00
Peter Edwards
5c33db12dc Only update the boot sector when there is a valid drive number provided.
(After squeezing a few more bytes out of boot0)

Discussed With: jhb, julian
PR: 66248
Submitted By: Hans Petter Selasky
MFC After: 1 week
2005-01-09 23:30:35 +00:00
Ruslan Ermilov
e653b48c80 Start the dreaded NOFOO -> NO_FOO conversion.
OK'ed by:	core
2004-12-21 08:47:35 +00:00
John Baldwin
4e38f13b5b - If the COMSPEED is set to 0, then don't try to initialize the serial port
and assume that the BIOS has set it up for us.  This allows folks with a
  serial-aware BIOS to set the BIOS to speeds above 9600 and allow boot0 to
  just use the existing settings.
- Purge some gratuitous cpp comments as per style(9).

Submitted by:	Danny Braniss danny at cs dot huji dot ac dot il (1)
MFC after:	1 month
2004-11-24 15:39:04 +00:00
Giorgos Keramidas
550b156641 Clean up the comments, rewording, adding missing punctuation
and other minor nits.

Approved by:	jhb
2004-11-06 06:13:13 +00:00
David E. O'Brien
8ae136ae71 In conjunction with having boot0cfg(8) default boot0 to packet mode.
Submitted by:	Tor.Egge@cvsup.no.freebsd.org
2004-08-27 00:18:03 +00:00
Poul-Henning Kamp
d33ccadc81 Save a couple of bytes for the SIO case. 2004-06-17 12:02:25 +00:00
Poul-Henning Kamp
f89485e2b1 Merge boot0 and boot0sio so they behave the same. 2004-06-11 09:45:18 +00:00
Ruslan Ermilov
b09ce52594 Partly back out last revision that unnecessarily changed valid
assembler line comments and damaged the CVS history.

Prompted by:	bde, jhb
2004-05-14 20:28:31 +00:00
Ruslan Ermilov
3c96564d00 Convert block comments into C-style that is understood by cpp(1).
Keep line comments in assembler style.  A few lines that match
the '^[[:space:]]+#' regexp still need to be fixed, somehow.

OK'ed by:	bde, jhb
2004-04-29 18:58:38 +00:00
Ruslan Ermilov
848c1050ee Thanks to David's patches, we can now simplify these makefiles
further, and just use PROG directly (without FILES).

Suggested by:	bde
2004-04-28 21:31:21 +00:00
Ruslan Ermilov
df1a364da7 Switch to using C99 comments in assembler preprocessed with cpp(1). 2004-04-28 20:55:01 +00:00
Ruslan Ermilov
69dd73b976 - Properly merge boot0sio.s and boot0.s into boot0.S.
boot0sio.s was repo-copied to boot0.S.

- Rename boot0ext.s to boot0ext.S, to stay consistent
  with other preprocessed asm files around here, and
  for better portability.

Repocopied by:	joe
2004-04-28 20:49:17 +00:00
Ruslan Ermilov
6886d8ff2a Temporary precaution measure until repocopy requests are
processed: don't forget to clean generated .s sources.
2004-04-28 16:16:16 +00:00
Poul-Henning Kamp
f025129b8a Change from '#' to "//" comment character to allow CPP preprocessing.
Merge boot0.s and boot0sio.s into boot0_512.s controlled by "#ifdef SIO".

Add Makefile magic to generate boot0.s and boot0sio.s from boot0_512.s.

The compile boot0 and boot0sio have unchanged MD5 checksums.
2004-04-27 19:07:35 +00:00
David E. O'Brien
a606451bd2 Use a more compact syntax for passing the "binary" options to 'ld'. 2004-04-25 20:36:44 +00:00
David E. O'Brien
a50d1c0876 Simplify the building of our i386 'binary' boot components by directly
producing them using 'ld' options rather than post-processing with 'objcopy'.

Idea by:	Ryan Sommers <ryans@gamersimpact.com>
2004-04-25 19:50:20 +00:00
David E. O'Brien
d2f313a8ae Fix a last second typo in 'vi' that caused a problem. 2004-04-20 13:34:18 +00:00
David E. O'Brien
a3ab3e07c5 White space style cleanup. 2004-04-20 03:15:59 +00:00
David E. O'Brien
6773834a49 MFp4: merge version #5 of the 2-sector boot0 from the "jhb boot" branch. 2004-04-19 19:31:48 +00:00
David E. O'Brien
ddffbabad8 Bring back jhb's two sector (1024 bytes) 'boot0' [rev 1.22] as 'boot0ext'. 2004-03-26 18:46:31 +00:00
Ruslan Ermilov
bcd106e18b - Factor out -nostdlib to an upper level Makefile.inc.
- Now that bsd.prog.mk deals with programs linked with -nostdlib
  better, and has a notion of an "internal" program, use PROG
  where possible.  This has a good impact on the contents of
  .depend files and causes programs to be linked with cc(1).

XXX: boot2 couldn't be converted as it's actually two programs.

Tested on:	i386, amd64
2004-02-09 14:11:58 +00:00
Ruslan Ermilov
a4a62f5d1f First round of cleanups to sys/boot/ makefiles:
- do not use PROG for what's not a real C program,
- use sys.mk transformation rules where possible,
- only create the "machine" symlink on AMD64,
- removed MAINTAINER lines in individual makefiles,
- added the LIBSTAND defitinion to <bsd.libnames.mk>,
- somewhat better contents in .depend files.

Tested on:	i386, amd64
Prodded by:	bde
2004-02-06 21:58:32 +00:00
Ruslan Ermilov
968ecff61c Inherit BINDIR from a parent Makefile.inc. 2004-02-06 12:58:32 +00:00
David E. O'Brien
b06cf654be Allow one to specify the com port settings for boot0sio. 2004-01-06 18:46:35 +00:00
John Baldwin
bb17adda46 Properly fix a typo that the previous revision made even worse. 2003-12-11 20:40:12 +00:00
David E. O'Brien
b5a8abc730 Sync these two files. 2003-12-09 05:40:06 +00:00
David E. O'Brien
53916adaa8 Hook boot0sio to the build. Use 'boot0cfg -b /boot/boot0sio' to use. 2003-12-08 19:02:06 +00:00
Bruce M Simpson
49bce9d435 Add a serial console capable version of the FreeBSD boot manager. This has
been lying around my tree(s) for the past year or so. It could do with TLC.

Requested by:	obrien
Sponsored by:	Weyland-Yutani Corporation
2003-12-08 17:51:39 +00:00
John Baldwin
9778a4e0c3 Update the size of the OS string table that wasn't updated in the previous
commit that removed the UNIX entry.

Submitted by:	Rudolf Cejka <cejkar@fit.vutbr.cz>
Approved by:	re (rwatson)
2003-11-20 20:28:18 +00:00
David E. O'Brien
3c5dad6ef0 Accpet '1'..'5' in place of F1..F5 for serial console users.
Reviewed by:	Bruce M Simpson <bms@spc.org>
2003-06-01 20:41:04 +00:00
Peter Wemm
66422f5b7a Initiate deorbit burn for the i386-only a.out related support. Moves are
under way to move the remnants of the a.out toolchain to ports.  As the
comment in src/Makefile said, this stuff is deprecated and one should not
expect this to remain beyond 4.0-REL.  It has already lasted WAY beyond
that.

Notable exceptions:
gcc - I have not touched the a.out generation stuff there.
ldd/ldconfig - still have some code to interface with a.out rtld.
old as/ld/etc - I have not removed these yet, pending their move to ports.
some includes - necessary for ldd/ldconfig for now.

Tested on: i386 (extensively), alpha
2002-09-17 01:49:00 +00:00
John Baldwin
83f4b92050 Unrevert revision 1.12. Revision 1.14 backed this out saying it was
backing out the 1024 sector boot0, but revision 1.12 had nothing to do with
that.  Instead, it documented various compile time options for boot0 and
allowed them to be overridden via make.conf or options on the make
command line.
2002-01-10 21:40:33 +00:00
Robert Nordier
816aa3c0b5 Unset MAINTAINER. 2001-07-21 14:32:47 +00:00
Robert Nordier
1165e4c9a4 Fix column alignment (whitespace-only change). 2000-12-19 00:17:36 +00:00
Robert Nordier
1ec5afb81e Add a magic number, for easier identification of boot0. At present,
this is used only by libdisk.
2000-12-12 17:27:35 +00:00
Robert Nordier
8c964b9bca Go back to occupying just a single sector, reverting r1.17 - r1.20.
Taking over the sector following the MBR causes problems on some
machines, and the actual gains are fairly small in terms of how
the space is presently used.

Since we need a number of further features (eg. handling extended
partitions) that can't be readily accommodated in the basic boot0
design anyway, rather choose to implement the additional stuff
separately and concentrate on compatibility rather than features
here.
2000-10-02 17:30:22 +00:00
Robert Nordier
ce6a6a0f90 Set MAINTAINER. 2000-10-02 17:23:16 +00:00
Robert Nordier
3348fae50d Correct BSD/OS slice type.
PR:           21099
Submitted by: Alan Clegg <abc@bsdi.com>
2000-09-09 18:05:22 +00:00
Robert Nordier
ff7ed3a234 Typo/spelling fixes. 2000-08-08 07:20:25 +00:00
John Baldwin
ab9e9f9d2d Argh! Fix a brainfart of mine. In the old boot0, we relocated ourself
to 0x600 via a 'rep movsw'.  Once that was done, %cx was zero, so we could
simply use 'movb' to update the lower byte of %cx in preparation for
zeroing out the fake partition entry used to boot to other drives via F5.
Well, in the new boot0, we don't actually relocate ourselves, instead it
is easier to create the fake partition entry first and then just use it to
get the BIOS to load all of boot0 into memory at 0x600.  However, since we
aren't doing the relocate code anymore, we don't know that %cx == 0 when
we hit the 'movb' to setup %cx for clearning the fake partition entry.
Thus, if %ch != 0 when the BIOS started boot0, then it would end up zeroing
a lot more memory than just 8 words.  The solution is to do a word move of
$8 into %cx.

Debugging help from:	David Wolfskill <dhw@whistle.com>
2000-08-04 22:37:21 +00:00