assure backward compatibility (conditional on !BURN_BRIDGES), look it up
by its old name first, and log a warning (but accept the setting) if it
was found. If both the old and new name are defined, the new name takes
precedence.
Also export vm.kmem_size as a read-only sysctl variable; I find it hard to
tune a parameter when I don't know its default value, especially when that
default value is computed at boot time.
use a bounce buffer for the actual transfer to avoid crossing a 64k
boundary. To do this, we malloc a buffer twice as big as we need and then
find an aligned block within that buffer to do the transfer. The check
to see which part of the block we use used the wrong variable for part of
the condition meaning that in certain edge cases we would ask the BIOS to
cross a 64k boundary. The BIOS request would then fail resulting in file
transfers that just magically fail in the middle without any apparent
reason. Specifically, my tests for the splitfs boot floppies managed to
trigger this edge case.
MFC after: 1 week
X-MFC-info: along with fixes to libstand filesystems
count.
- Fix the twiddle output so that it actually spins.
- Save %cx around BIOS calls to read in sectors from the disc as at least
one BIOS trashes %cx when called to read off of a USB CD-ROM drive.
Submitted by: Martin Nilsson <martin@gneto.com>
MFC after: 1 week
- handle multiple Ofw memory regions when determining mem size
- allow currdev to be set as a loader command-line option.
parse() is used to allow future options to be processed.
flag rather than explicitly halting if a lookup failed.
- Add a loop around the call to lookup() to traverse an array of
nul-terminated strings for possible paths to the boot loader. A double
nul character denotes the end of the list.
- Add a new message to say that the boot failed if all of the path lookups
for a boot loader file failed.
- Add '/boot/loader' as a second boot path. If you build an ISO using
risky options to mkisofs such as -U then the loader will be called
'/boot/loader' rather than '/BOOT/LOADER;0'. This allows cdboot to work
with such risky ISO images.
- Bump version to 1.2 to denote added functionality.
The basic idea as well as some of the code were provided by the submitter,
but I added some extra code to use a loop rather than hard-code just 2
possible paths.
PR: misc/43543
Submitted by: kientzle
MFC after: 1 week
- Move loader relocation up to 0x1C00000. This is in line with OSX bootx,
and allows more space for boot-time modules/ramdisks without conflicting
with OpenFirmware's use of RAM
different kernel to boot with kernel="NAME" would load the kernel and
loader.conf-selected modules from /boot/NAME, but it would not change
module_path. So, for instance, the automatically loaded acpi.ko would come
from /boot/kernel/acpi.ko, *always*.
Mind you, this happened for unassisted boot. If you interrupted, typed
"unload" and then "boot NAME", it would Do The Right Thing.
The source of the problem is the double initialization with beastie's
loader.rc. One would happen inside "start", and would load the kernel. The
next one would happen later in the loader.rc script, resetting module_path.
Because module_path is set to the Right Value by the functions in support.4th
that actually load the kernel, when beastie.4th proceeded to boot
module_path would remain wrong, as the kernel was already loaded.
This can be corrected by removing either initialization, and also by changing
the command used by beastie.4th from "boot" to "boot-conf", which makes sure
you use the right kernel and modules.
I chose to remove the second initialization, since this let you interrupt
(or confirm) boot before beastie even comes up. I avoid also doing the
boot-conf change because that would simply cause the kernel and modules to
be loaded twice (in fact, that was my original patch, until, in writing this
very commit message, I saw the error of my ways).
This commit changes the semantics of module loading when using the beastie
menu. Now it does what one would expect it to, but not what it was actually
doing, so something may break for unusual setups depending on broken
behavior. As our japanese friends so nicely put it, shikata ga nakatta. :-)
Approved by: re (scottl)
While we end up the same place, we end up with two different CS register
values after the jump and 0xf000 is compatible with the hardware reset
value.
This makes a difference if the BIOS does a near jump before a far jump.
Detective work and patch by: Adrian Steinmann <ast@marabu.ch>
value as reserved for internal use in boot blocks, because RB_PAUSE
broke binary compatibility by usurping the RB_DUAL flag. Probably no
one except me has boot blocks for which this matters, since most boot
blocks based on biosboot including pc98's boot2 can't boot elf kernels,
and /boot/loader doesn't properly pass flags set by the previous stage.
reboot.h:
Also mark the historical RB_PROBEKBD flag (0x80000) as reserved for
internal use in boot blocks.
boot2.c:
Added comments to inhibit usurping of other flags.
Approved by: guido, imp
MFC after: 1 week
This ensures that uart gets a higher console priority than syscons when
a serial console is being used. Testing against the "console" environment
variable doesn't make sense since we only have one loader console driver.
commit broke the world because it depended on namespace pollution that
was only in my version of <machine/bootinfo.h>. The include was removed
in rev.1.63 after the last reference to it went away in rev.1.61.
comment about this flag in rev.1.61. It is not historical like the
comment said; it is the flag that says that most of what is laboriously
put in the bootinfo struct is actually there. Newer kernels were
bootable by even the broken boot2 without losing anything except the
symbol table, but older kernels need at least the memory sizes.
Restoring the "|" with RB_BOOTINFO that was lost in rev.1.43 costs 5
bytes. The fix can be done in only 4 bytes by fixing some code that
was removed in rev.1.61 (put RB_BOOTINFO back in in the initial value
of "opts" and fix RBX_MASK to not clobber it.)
the root path. This is reported to make non-PXE netbooting, such as
is used on sparc64 systems, work correctly when the TFTP server is
not the same as the root server.
PR: kern/57328
Submitted by: Per Kristian Hove <Per.Hove@math.ntnu.no>
boot time. Instead, read it a sector at a time. While this sounds
like a significant slowdown, I've not been able to measure any
signficant difference.
Submitted by: luigi
Reviewed by: jhb, sam (both a while ago)
MFC After: 3 days
EFI file system. When booting from a CD and there's already an EFI
system partition on the disk, setting the current device to unit 0
will select the harddisk. This invariably breaks installing FreeBSD
when other operating systems have been installed before.
We obviously want to do the same when we're booting over the network.
Maybe later.
Based on a patch (from memory) from: arun
bsd.lib.mk and thus broke the build since AFLAGS were not taken
into considered anymore, as bsd.lib.mk currently has wrong .s.o
rule that uses cc(1) instead of as(1).
Revision 1.14 reverted to using as(1), and revision 1.15 brought
AFLAGS back to the business, but revision 1.14 also broke "make
clean".
To fix this, but not break anything that was fixed in revisions
1.13-1.15, we revert mostly to revision 1.13 except for switching
back to using bsd.prog.mk. This gives us back the default .s.o
rule from sys.mk that uses as(1), and fixes "make clean" by
restoring the full contents of OBJS.
Also fixed LDFLAGS.
the terminating '\0'. Since the initialisation of rootpath in
libstand/bootp.c may copy junk into the rest of the buffer, it was
possible for the code to find a ':' after the '\0' and do the wrong
thing.
Reviewed by: ps
MFC after: 1 week
common code, the non-trivial part is #ifdef'ed and only executes when
loading amd64 kernels. The rest is trivial but needed for the the amd64
case. (Two variables changed from char ** to Elf_Addr).
Approved by: re (amd64 "low-risk" stuff)
things over floppy size limits, I can exclude it for release builds or
something like that. Most of the changes are to get the load_elf.c file
into a seperate elf32_ or elf64_ namespace so that you can have two
ELF loaders present at once. Note that for 64 bit kernels, it actually
starts up the kernel already in 64 bit mode with paging enabled. This
is really easy because we have a known minimum feature set.
Of note is that for amd64, we have to pass in the bios int 15 0xe821
memory map because once in long mode, you absolutely cannot make VM86
calls. amd64 does not use 'struct bootinfo' at all. It is a pure loader
metadata startup, just like sparc64 and powerpc. Much of the
infrastructure to support this was adapted from sparc64.
* AcpiOsDerivePciId(): finds a bus number, given the slot/func and the
acpi parse tree.
* AcpiOsPredefinedOverride(): use the sysctl hw.acpi.os_name to
override the value for _OS.
Ideas from: takawata, jhb
Reviewed by: takawata, marcel
Tested on: i386, ia64
Move the remaining bits of <sys/diskslice.h> to <i386/include/bootinfo.h>
Move i386/pc98 specific bits from <sys/reboot.h> to
<i386/include/bootinfo.h> as well.
Adjust includes in sys/boot accordingly.
queue items that can be allocated by netgraph and the number of free queue
items that are cached on a private list.
Netgraph places an upper limit on the number of queue items it may allocate.
When there is a large number of netgraph messages travelling through the
system (100k/sec and more) there is a high probability, that messages get
queued at the nodes and netgraph runs out of queue items. In this case the data
flow through netgraph gets blocked. The tuneable for the number of free
items lets one trade memory for performance.
The tunables are also available as read-only sysctls.
PR: kern/47393
Reviewed by: julian
Approved by: jake (mentor)
introduce a preprocessor define for it. The larger block size
significantly speeds up the loading of the kernel.
Submitted by: Arun Sharma <arun.sharma@intel.com>
and instead add platform, firmware and EFI stubs to the loader.
The net effect of this change is that besides a special console and
disk driver, the kernel has no knowledge of the simulator. This has
the following advantages:
o Simulator support is much harder to break,
o It's easier to make use of more feature complete simulators.
This would only need a change in the simulator specific loader,
o Running SMP kernels within the simulator. Note that ski at this
time does not simulate IPIs, so there's no way to start APs.
The platform, firmware and EFI stubs describe the following hardware:
o 4 CPU Itanium,
o 128 MB RAM within the 4GB address space,
o 64 MB RAM above the 4GB address space.
NOTE: The stubs in the skiloader describe a machine that should in
parts be defined by the simulator. Things like processor interrupt
block and AP wakeup vector cannot be choosen at random because they
require interpretation by the simulator. Currently the simulator is
ignorant of this.
This change introduces an unofficial SSC call SSC_SAL_SET_VECTORS
which is ignored by the simulator.
Tested with: ski (version 0.943 for linux)
o Revision 1.38 introduced the -n flag. It conflicted with the
RB_BOOTINFO flag, so was in effect always on. Change the -n flag to
be bit 0x1c instead of 0x1f. This also had the consequence that a mal-formed
/boot.config would render the system unbootable because the user was
unable to enter anything at all on the command line.
o Remove the initialization of opt to be RB_BOOTINFO since we filter that bit
out and do not otherwise use it.
Reviewed by: jhb
MFC after: 3 days
It is not complete (the LILO root= specification isn't passed to our
loader for instance), it has not been touched in over 2 years. Linux has
moved on to GRUB, so this is OBE now. If someone creeps up to work on it,
it could become a port.
