cinap_lenrek [Fri, 31 Oct 2014 18:43:47 +0000 (19:43 +0100)]
efi: iso filesystem support for cdrom booting
instead of including kernel and config in the efi
fat image, we can just include the loaders and
read the plan9.ini and kernel from iso filesystem
just like the bios loaders.
cinap_lenrek [Thu, 23 Oct 2014 22:40:09 +0000 (00:40 +0200)]
efi: change eficonfig ordering so memconf() is first, dont fallback to fs when /cfg/pxe/ file isnt there
having the memconf() (*e820=) last clutters the screen.
do it first, so we can read *acpi= and *bootscreen=
prints.
we want to continue using tftp even when the /cfg/pxe/$ether
file is not found. only when we detect no pxe/dhcp session,
then we switch to local filesystem (non-network boot).
cinap_lenrek [Tue, 21 Oct 2014 04:03:03 +0000 (06:03 +0200)]
pc, pc64: make mtrr() callable from interrupt context and before mpinit
to make it possible to mark the bootscreen framebuffer
as write combining in early initialization, mtrr() is
changed not not to error() but to return an error string.
as bootscreen() is used before multiprocessor initialization,
we have to synchronize the mtrr's for every processor as
it comes online. for this, a new mtrrsync() function is
provided that is called from cpuidentify() if mtrr support
is indicated.
the boot processor runs mtrrsync() which snarfs the
registers. later, mtrrsync() is run again from the
application processors which apply the values from the
boot processor.
checkmtrr() from mp.c was removed as its task is also
done by mtrrsync() now.
cinap_lenrek [Sat, 18 Oct 2014 00:01:58 +0000 (02:01 +0200)]
pc, pc64: allow passing RSDT pointer in *acpi= boot parameter, early bootscreeninit(), fix rampage() usage
rampage() cannot be used after meminit(), so test for
conf.mem[0].npage != 0 and use xalloc()/mallocalign()
instead. this allows us to use vmap() early before
mmuinit() which is needed for bootscreeninit() and
acpi.
to get memory for page tables, pc64 needs a lowraminit().
with EFI, the RSDT pointer is passed in *acpi= parameter
from the efi loader. as the RSDT is ususally at the end of
the physical address space (and not to be found in
bios areas), we cannot KMAP() it so we need to vmap().
hgfs: make data files with meta headers having the right size after open
to get the right data size of a file, the revlog needs to have been
opened and the metaheader parsed. as an optimization, we used to
open revlog only on the first read resulting revlogs with metaheaders
having the wrong size returned by fstat() until the first read().
tar relies on fstat() giving the correct file size, so just open
the revlog on open. reading directories can still yield the wrong
size but it is not that critical.
there was a memory corruption bug caused by us enabling the
ps2mouseputc() handler *before* initializing packetsize.
once we enabled the handler, mouse interrupts could come
in and advance the packet buffer index (nb) beyond the
buffer boundaries.
as ps2mouseputc() only checked for ++nb == packetsize, once
nb was advanced beyond the packetsize, it would continue writing
beyond the buffer and corrupt memory with each mouse packet byte.
solution is to initialize packetsize *before* enabling the
handler, and also do a >= check in ps2mouseputc() in case the
packetsize gets changed to a smaller value at runtime.
ndb/dns: request recursion only for local dns servers
we used to set RD flag in requests unconditionally, which
is fine by the standard but some dns server administrators
seem to use it as a denial of service indicator (for ther
non recursive authoritative nameservers) and ignore the
request.
so only set the RD flag when talking to local dns servers.
alexchandel got the kernel to crash with divide error
on qemu 2.1.2/macosx at this location. probably
caused by perfticks()/tsc being wrong or accounttime()
not having been called yet from timer interrupt yet for
some reason.
the syscall stubs (for amd64) currently have a unconditional
spill of the first (register) argument to the stack.
sysr1 (and _nsec) are exceptional in that they do not
take any arguments, so the stub is writing unconditionally
to ther first argument slot on the stack.
i could avoid emiting the spill in the syscall stubs for
sysr1 but that would also break truss which assumes fixed
instruction sequence from stub start to the syscall number.
i'm not going to complicate the syscall stubs just for
sysr1 (_nsec is not used in 9front), but just add a dummy
argument to sysr1 definition that can receive the bogus
argument spill.
sysinfo: relax regex for start of kernel boot messages
we used to look for /^Plan 9$/ for the start of kernel
boot messages in /dev/kmesg. but the xen kernel prints
Plan 9 (.....) on boot. so just look for line starting
with /^Plan 9/ for now.
lib9p: fix nil dereference crash in remove for directory permission check
file->parent can be nil when the file has been previously removed.
removefile() deals with this, so skip the permission check in
that case and let removefile() error out.
libauthsrv: allow multiple auth= attributes for backup auth servers, authdial() tries each one in order
some of us run auth servers from home that are used by multiple
servers on the internet. when the home authserver becomes unreachable,
services on the outside servers stop working. so we thought about
specifing a secondary auth servers for backup when the primary
server is not reachable.
this changes authdial() to consult multiple auth= entries in
the authdom= or dom= tuples, trying each one in order until
dial() succeeds.
kernel: fix segattach() rounding of va+len (thanks kenji arisawa)
from segattach(2):
Va and len specify the position of the segment in the
process's address space. Va is rounded down to the nearest
page boundary and va+len is rounded up. The system does not
permit segments to overlap. If va is zero, the system will
choose a suitable address.
just rounding up len isnt enougth. we have to round up va+len
instead of just len so that the span [va, va+len) is covered
even if va is not page aligned.
libsec: fix hmac for keys bigger then 64 byte block size
RFC2104 defines HMAC for keys bigger than the 64 byte block
size as follows:
Applications that use keys longer than B (64) bytes will
first hash the key using H (the hash function) and then
use the resultant L byte string as the actual key to HMAC.
ip/ayiya: experimental anything in anything tunnel protocol client
this is a work in progress implementation of the ayiya (anything
in anything) protocol as used by sixxs.net. hiro tested it and it
worked for him, but progress has stalled as sixxs.net rejected my
request for an account and ignored my emails since.
projects / plan9front.git / log