expressions on i386 are evaluated in the range of the long double type,
so this is wrong in a different but hopefully less worse way than
before. Since expressions are evaluated in long double registers,
there is no runtime cost to using long double instead of double to
declare intermediate values (except in cases where this avoids compiler
bugs), and by careful use of float_t or double_t it is possible to
avoid some of the compiler bugs in this area, provided these types are
declared as long double.
I was going to change float.h to be less broken and more usable in
combination with the change here (in particular, it is more necessary
to know the effective number of bits in a double_t when double_t !=
double, since DBL_MANT_DIG no longer logically gives this, and
LDBL_MANT_DIG doesn't give it either with FreeBSD-i386's default
rounding precision. However, this was too hard for now. In particular,
LDBL_MANT_DIG is used a lot in libm, so it cannot be changed. One
thing that is completely broken now is LDBL_MAX. This may have sort
of worked when it was changed from DBL_MAX in 2002 (adding 0 to it at
runtime gave +Inf, but you could at least compare with it), but starting
with gcc-3.3.1 in 2003, it is always +Inf due to evaluating it at
compile time in the default rounding precision.
mount options that mount_nfs could pass down, if it passed
down string mount options. Right now, mount_nfs jut passes
down a single mount option named "nfs_args" with a fully
initialized 'struct nfs_args'.
In future commits, we will add code to the kernel for parsing stringified
NFS mount options, so that we can convert mount_nfs to pass string options
from userspace to kernel, instead of an initialized struct nfs_args.
the same way that it is default initialized in revision 1.77 of mount_nfs.c.
Right now, this is a no-op, because currently we initialize
struct nfs_args in mount_nfs in userspace, and pass it
down into the kernel via nmount(), so we overwrite whatever we initialize
here with the value passed in from userspace.
However, this lays the groundwork for moving away from passing
struct nfs_args from userspace to kernel via nmount(), so that we
can instead pass string mount options via nmount() which can be parsed in
the kernel. This will make it easier to add new NFS mount options.
doing the MNT_RELOAD, pass in "ro" and "update"
string mount options to nmount() instead of MNT_RDONLY and MNT_UPDATE flags.
Due to the complexity of the mount parsing code especially
with respect to the root file system, passing in MNT_RDONLY and MNT_UPDATE
flags would do weird things and would cause fsck to convert the root
file system from a read-only mount to read-write.
To test:
- boot into single user mode
- show mounted file systems with: mount
- root file system should be mounted read-only
- fsck /
- show mounted file systems with: mount
- root file system should still be mounted read-only
PR: 120319
MFC after: 1 month
Reported by: yar
passing it to cpuset_which(). Pass in 'set' instead. This argument
is not used but for convenience cpuset_which() nulls all incoming
parameters.
Submitted by: davidxu
we set scheduling parameters and cpu binding fully in userland, and
because default scheduling policy is SCHED_RR (time-sharing), we set
default sched_inherit to PTHREAD_SCHED_INHERIT, this saves a system
call.
Patch in the PR was modified to check active jumbo buffers in use
and other possible jumbo buffer leak.
Jumbo buffer usage in lge(4) still wouldn't be reliable due to lack
of driver lock in local jumbo buffer allocator. Either introduce
a new lock to protect jumbo buffer or switch to UMA backed page
allocator for jumbo frame is required.
PR: kern/78072
little bit and to prevent users from specifying a private mask that may
later restrict other group changes.
- Add a man page which brueffer generously contributed to.
Sponsored by: Nokia
mask none of the upper bits are set.
- Be more careful about enforcing the boundaries of masks and child sets.
- Introduce a few more CPU_* macros for implementing these tests.
- Change the cpusetsize argument to be bytes rather than bits to match
other apis.
Sponsored by: Nokia
address PR ports/121363 (current day re-opening of PR ports/73797)
to make ports CFLAGS more independent of src/'s CFLAGS WRT aliasing.
Discussed with: brooks
IPPORT_EPHEMERALFIRST and IPPORT_EPHEMERALLAST with values
10000 and 65535 respectively.
The rationale behind is that it makes the attacker's life more
difficult if he/she wants to guess the ephemeral port range and
also lowers the probability of a port colision (described in
draft-ietf-tsvwg-port-randomization-01.txt).
While there, remove code duplication in in_pcbbind_setup().
Submitted by: Fernando Gont <fernando at gont.com.ar>
Approved by: njl (mentor)
Reviewed by: silby, bms
Discussed on: freebsd-net
Change the default CFLAGS to match the simple defaults that the
tinderboxes use. By using -fno-strict-aliasing by default we are
choosing to ignore problems in code which had the potential to
shoot ourselves in the foot.
mappings. Automatic promotion can be enabled by setting the tunable
"vm.pmap.pg_ps_enabled" to a non-zero value. By default, automatic
promotion is disabled. (Expect this to change.)
Reviewed by: ups
Tested by: kris, Peter Holm
explicitly rather than relying on name space pollution to pull it in
for us.
NB: The usage of INT_MIN is somewhat bogus and suspect to my eye, but this
commit doesn't address that issue.
the specific semantics of ockmgr aren't required: update UFS1 extended
attributes to protect its data structures using an sx lock.
While here, update comments on lock granularity.
MFC after: 2 weeks
The most important point is that -f option(s) are never copied from
.Ev MAKEFILE to .Va .MAKEFILE by make(1), which is consistent with
handling the command line. (-f silently sit in .Ev MAKEFILE and go
to make's children unless overwritten via .Va .MAKEFILE)
Bump .Dd.
however if current thread is executing cancellation handler, signal
SIGCANCEL may have already been blocked, this is unexpected, unblock the
signal in new thread if this happens.
MFC after: 1 week
The kernel config file is KERNCONF=MPC85XX, so the usual procedure applies:
1. make buildworld TARGET_ARCH=powerpc
2. make buildkernel TARGET_ARCH=powerpc TARGET_CPUTYPE=e500 KERNCONF=MPC85XX
This default config uses kernel-level FPU emulation. For the soft-float world
approach:
1. make buildworld TARGET_ARCH=powerpc TARGET_CPUTYPE=e500
2. disable FPU_EMU option in sys/powerpc/conf/MPC85XX
3. make buildkernel TARGET_ARCH=powerpc TARGET_CPUTYPE=e500 KERNCONF=MPC85XX
Approved by: cognet (mentor)
MFp4: e500
TSEC is the MAC engine offering 10, 100 or 1000 Mbps speed and is found on
different Freescale parts (MPC83xx, MPC85xx). Depending on the silicon version
there are up to four TSEC units integrated on the chip.
This driver also works with the enhanced version of the controller (eTSEC),
which is backwards compatible, but doesn't take advantage of its additional
features (various off-loading mechanisms) at the moment.
Approved by: cognet (mentor)
Obtained from: Semihalf
MFp4: e500
The QUICC engine is found on various Freescale parts including MPC85xx, and
provides multiple generic time-division serial channel resources, which are in
turn muxed/demuxed by the Serial Communications Controller (SCC).
Along with core QUICC/SCC functionality a uart(4)-compliant device driver is
provided which allows for serial ports over QUICC/SCC.
Approved by: cognet (mentor)
Obtained from: Juniper
MFp4: e500
The PQ3 is a high performance integrated communications processing system
based on the e500 core, which is an embedded RISC processor that implements
the 32-bit Book E definition of the PowerPC architecture. For details refer
to: http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=MPC8555E
This port was tested and successfully run on the following members of the PQ3
family: MPC8533, MPC8541, MPC8548, MPC8555.
The following major integrated peripherals are supported:
* On-chip peripherals bus
* OpenPIC interrupt controller
* UART
* Ethernet (TSEC)
* Host/PCI bridge
* QUICC engine (SCC functionality)
This commit brings the main functionality and will be followed by individual
drivers that are logically separate from this base.
Approved by: cognet (mentor)
Obtained from: Juniper, Semihalf
MFp4: e500
