When we open the disk, check the type of partition table, that has
been detected. If this is BSD label, then we assume this is DD mode.
Reported by: dim@
It uses new API from the part.c to work with partition tables.
Update userboot's disk driver to use new API. Note that struct
loader_callbacks_v1 has changed.
This way with the new zfsloader there is no need to explicitly set zfs
root filesystem either via vfs.root.mountfrom or fstab.
It should be automatically picked up from currdev which is by default
is set from bootfs.
Tested by: Florian Wagner <florian@wagner-flo.net> (x86)
MFC after: 1 month
In zfs loader zfs device name format now is "zfs:pool/fs",
fully qualified file path is "zfs:pool/fs:/path/to/file"
loader allows accessing files from various pools and filesystems as well
as changing currdev to a different pool/filesystem.
zfsboot accepts kernel/loader name in a format pool:fs:path/to/file or,
as before, pool:path/to/file; in the latter case a default filesystem
is used (pool root or bootfs). zfsboot passes guids of the selected
pool and dataset to zfsloader to be used as its defaults.
zfs support should be architecture independent and is provided
in a separate library, but architectures wishing to use this zfs support
still have to provide some glue code and their devdesc should be
compatible with zfs_devdesc.
arch_zfs_probe method is used to discover all disk devices that may
be part of ZFS pool(s).
libi386 unconditionally includes zfs support, but some zfs-specific
functions are stubbed out as weak symbols. The strong definitions
are provided in libzfsboot.
This change mean that the size of i386_devspec becomes larger
to match zfs_devspec.
Backward-compatibility shims are provided for recently added sparc64
zfs boot support. Currently that architecture still works the old
way and does not support the new features.
TODO:
- clear up pool root filesystem vs pool bootfs filesystem distinction
- update sparc64 support
- set vfs.root.mountfrom based on currdev (for zfs)
Mid-future TODO:
- loader sub-menu for selecting alternative boot environment
Distant future TODO:
- support accessing snapshots, using a snapshot as readonly root
Reviewed by: marius (sparc64),
Gavin Mu <gavin.mu@gmail.com> (sparc64)
Tested by: Florian Wagner <florian@wagner-flo.net> (x86),
marius (sparc64)
No objections: fs@, hackers@
MFC after: 1 month
table aren't valid. If they are ok, use hdr_lba_alt value to read backup
header. This will make gptboot happy when GPT used atop of some GEOM
provider, e.g. GEOM_MIRROR.
Reviewed by: pjd
MFC after: 2 weeks
quantum bytewise to the address of a 64-bit variable results in writing
to the "wrong" 32-bit half so adjust the address accordingly. This fix
is implemented in a hackish way for two reasons:
o in order to be able to get it into 8.3 with zero impact on the little-
endian architectures where this bug has no effect and
o to avoid blowing the x86 boot2 out of the water again when compiling
it with clang, which all sane versions of this fix tested do.
This change fixes booting from UFS1 file systems on big-endian machines.
MFC after: 3 days
The index() and rindex() functions were marked LEGACY in the 2001
revision of POSIX and were subsequently removed from the 2008 revision.
The strchr() and strrchr() functions are part of the C standard.
This makes the source code a lot more consistent, as most of these C
files also call into other str*() routines. In fact, about a dozen
already perform strchr() calls.
In an example of boot command:
- rename wd(4) IDE disk drives name to ad(4) for the time being.
- update the used kernel path "/kernel" to the current default.
[It still worked occasionally by looking into the /boot/kernel directory,
so the resulting path was "/boot//kernel/kernel", with two slashes.]
Bump .Dd for this and previous changes.
MFC after: 1 week
large (>= 10^10) numbers. In theory, 20 characaters should be enough,
but bump the buffer to 32 characters, so we have some room for the
future.
Reviewed by: pjd
Approved by: re (kib)
bogusly casts its contents around causing alignment faults on sparc64 and
most likely also on at least powerpc. Fix this by copying the contents
bytewise instead as partly already done here. Solving this the right way
costs some space, i.e. 148 bytes with GCC and 16 bytes with clang on x86
there are still some bytes left there though, and an acceptable hack which
tricks the compiler into only using a 2-byte alignment instead of the native
one when accessing the contents turned out to even take up more space that.
Some of loader filesystems are very ill equipped to handle seeking
backwards within the file. Namely, tftp requires trasfer to be
restarted from the start of the file every time we go backwards.
Discussed on hackers and recommended for inclusion into 9.0 at the devsummit.
All support email to devin dteske at vicor dot ignoreme dot com .
Submitted by: dteske at vicor dot ignoreme dot com
Reviewed by: me and many others
Some files keep the SUN4V tags as a code reference, for the future,
if any rewamped sun4v support wants to be added again.
Reviewed by: marius
Tested by: sbruno
Approved by: re
to the l_load() method in the file_formats structure, while being passed
an address as an argument (dest). With file_load() calling arch_loadaddr()
now, this bug is a little bit more significant.
Spotted by: nyan@ (nice catch!)
1. arch_loadaddr - used by platform code to adjust the address at which
the object gets loaded. Implement PC98 using this new interface instead
of using conditional compilation. For ELF objects the ELF header is
passed as the data pointer. For raw files it's the filename. Note that
ELF objects are first considered as raw files.
2. arch_loadseg - used by platform code to keep track of actual segments,
so that (instruction) caches can be flushed or translations can be
created. Both the ELF header as well as the program header are passed
to allow platform code to treat the kernel proper differently from any
additional modules and to have all the relevant details of the loaded
segment (e.g. protection).
Add support for Pre-Boot Virtual Memory (PBVM) to the loader.
PBVM allows us to link the kernel at a fixed virtual address without
having to make any assumptions about the physical memory layout. On
the SGI Altix 350 for example, there's no usuable physical memory
below 192GB. Also, the PBVM allows us to control better where we're
going to physically load the kernel and its modules so that we can
make sure we load the kernel in memory that's close to the BSP.
The PBVM is managed by a simple page table. The minimum size of the
page table is 4KB (EFI page size) and the maximum is currently set
to 1MB. A page in the PBVM is 64KB, as that's the maximum alignment
one can specify in a linker script. The bottom line is that PBVM is
between 64KB and 8GB in size.
The loader maps the PBVM page table at a fixed virtual address and
using a single translations. The PBVM itself is also mapped using a
single translation for a maximum of 32MB.
While here, increase the heap in the EFI loader from 512KB to 2MB
and set the stage for supporting relocatable modules.
o bunch of variables are turned into uint8_t
o initial setting of namep[] in lookup() is removed
as it's only overwritten a few lines down
o kname is explicitly initialized in main() as BSS
in boot2 is not zeroed
o the setting and reading of "fmt" in load() is removed
o buf in printf() is made static to save space
Reviewed by: jhb
Tested by: me and Fabian Keil <freebsd-listen fabiankeil de>
