nwhitehorn [Mon, 5 Jan 2015 18:15:16 +0000 (18:15 +0000)]
Revert r272109 locally, which is not quite equivalent in how it deals with
missing interrupt-parent properties. A better solution will come later,
but this restores pseries in QEMU for the time being.
imp [Mon, 5 Jan 2015 12:28:22 +0000 (12:28 +0000)]
Clang's 3.5 integrated assembler now handles these files correctly (it
has support for the .codeXX directives). However, it is desirable, for
a time, to allow kernels to be built with clang 3.4. Historically, it
has been advantageous to allow stable X-1 to build kernels the old
way (so long as the impact of doing so is small), and this restores
that ability.
Also, centralize the addition of ${ASM_CFLAGS.${.IMPSRC}}, place it in
kern.mk rather than kern.pre.mk so that all modules can benefit, and
give the same treatment to CFLAGS in kern.mk as well.
rwatson [Mon, 5 Jan 2015 09:58:32 +0000 (09:58 +0000)]
To ease changes to underlying mbuf structure and the mbuf allocator, reduce
the knowledge of mbuf layout, and in particular constants such as M_EXT,
MLEN, MHLEN, and so on, in mbuf consumers by unifying various alignment
utility functions (M_ALIGN(), MH_ALIGN(), MEXT_ALIGN() in a single
M_ALIGN() macro, implemented by a now-inlined m_align() function:
- Move m_align() from uipc_mbuf.c to mbuf.h; mark as __inline.
- Reimplement M_ALIGN(), MH_ALIGN(), and MEXT_ALIGN() using m_align().
- Update consumers around the tree to simply use M_ALIGN().
This change eliminates a number of cases where mbuf consumers must be aware
of whether or not mbufs returned by the allocator use external storage, but
also assumptions about the size of the returned mbuf. This will make it
easier to introduce changes in how we use external storage, as well as
features such as variable-size mbufs.
nwhitehorn [Mon, 5 Jan 2015 04:33:39 +0000 (04:33 +0000)]
Add kexec-based Linux shim loader for use with the firmware petitboot
loader on PS3 and POWER8 systems. This is reasonably portable to other
architectures, especially FDT-based ones, if similar features are useful
elsewhere.
Netboot support is missing for now and will be added in a future commit,
at which time loader.ps3 will be garbage collected.
adrian [Mon, 5 Jan 2015 02:06:26 +0000 (02:06 +0000)]
Add initial Qualcomm Atheros QCA955x SoC support.
This adds the initial frequency poking and configures up enough
for it to boot and spit out data over the console.
There's still a whole bunch of work to do in the reset path
and devices to support this thing, but hey, it's alive!
ath> go 0x80050100
## Starting application at 0x80050100 ...
CPU platform: Atheros AR9558 rev 0
CPU Frequency=720 MHz
CPU DDR Frequency=600 MHz
CPU AHB Frequency=200 MHz
platform frequency: 720 MHz
CPU reference clock: 0 MHz
CPU MDIO clock: 40 MHz
Done at: hackathon
Obtained from: Linux OpenWRT, Qualcomm Atheros
kib [Mon, 5 Jan 2015 01:06:54 +0000 (01:06 +0000)]
Avoid calling internal libc function through PLT or accessing data
though GOT, by staticizing and hiding. Add setter for
__error_selector to hide it as well.
Suggested and reviewed by: jilles
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
ian [Sun, 4 Jan 2015 20:08:24 +0000 (20:08 +0000)]
Eliminate uninitialized variable warnings in kernel and module builds when
building with gcc 4.2
This has been requested several times over the past few months by several
people (including me), because gcc 4.2 just gets it wrong too often. It's
causing us to litter the code with lots of bogus initializers just to
squelch the warnings. We still have clang and coverity telling us about
uninitialized variables, and they do so more accurately.
sys/kern_subr_taskqueue.c:
Modify taskqueue_drain_all() processing to use a temporary
"barrier task", rather than rely on a user task that may
be destroyed during taskqueue_drain_all()'s execution. The
barrier task is queued behind all previously queued tasks
and then has its priority elevated so that future tasks
cannot pass it in the queue.
Use a similar barrier scheme to drain threads processing
current tasks. This requires taskqueue_run_locked() to
insert and remove the taskqueue_busy object for the running
thread for every task processed.
share/man/man9/taskqueue.9:
Remove warning about live-lock issues with taskqueue_drain_all()
and indicate that it does not wait for tasks queued after
it begins processing.
dchagin [Sun, 4 Jan 2015 10:34:02 +0000 (10:34 +0000)]
Indeed, instead of hiding the kern___getcwd() bug by bogus cast
in r276564, change path type to char * (pathnames are always char *).
And remove bogus casts of malloc().
kern___getcwd() internally doesn't actually use or support u_char *
paths, except to copy them to a normal char * path.
These changes are not visible to libc as libc/gen/getcwd.c misdeclares
__getcwd() as taking a plain char * path.
While here remove _SYS_SYSPROTO_H_ for __getcwd() syscall as
we always have sysproto.h.
kib [Sun, 4 Jan 2015 00:33:41 +0000 (00:33 +0000)]
Do not erronously export 'openat' symbol from rtld.
The symbol leaked after r276630 since lib/libc/sys/openat.c defines
versions for openat using .symver (version script cannot assign two
versions to one symbol), and rtld uses openat. Instead, directly use
__sys_openat().
Reported and tested by: antoine
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
ian [Sat, 3 Jan 2015 22:33:18 +0000 (22:33 +0000)]
Add a new trap-v6.c which has support for all armv7 exceptions. This
mostly paves the way for the new pmap code, and shouldn't result in any
noticible behavior differences.
Submitted by: Svatopluk Kraus <onwahe@gmail.com>,
Michal Meloun <meloun@miracle.cz
ian [Sat, 3 Jan 2015 19:38:37 +0000 (19:38 +0000)]
Create a custom /boot/defaults/loader.conf for ARM. This differs from the
standard file in the following ways:
- modules_path includes /boot/dtb
- It doesn't contain 533 lines, of which 500 are either commented out,
empty, or something_which_doesnt_work_on_arm_anyway=NO
The standard defaults file takes 40+ seconds to process on an arm beaglebone
board. This one takes just a couple seconds.
This gets installed instead of the original because of the .PATH magic in
the makefile.
kib [Sat, 3 Jan 2015 18:38:46 +0000 (18:38 +0000)]
Fix known issues which blow up the process after dlopen("libthr.so")
(or loading a dso linked to libthr.so into process which was not
linked against threading library).
- Remove libthr interposers of the libc functions, including
__error(). Instead, functions calls are indirected through the
interposing table, similar to how pthread stubs in libc are already
done. Libc by default points either to syscall trampolines or to
existing libc implementations. On libthr load, libthr rewrites the
pointers to the cancellable implementations already in libthr. The
interposition table is separate from pthreads stubs indirection
table to not pull pthreads stubs into static binaries.
- Postpone the malloc(3) internal mutexes initialization until libthr
is loaded. This avoids recursion between calloc(3) and static
pthread_mutex_t initialization.
- Reinstall signal handlers with wrapper on libthr load. The
_rtld_is_dlopened(3) is used to avoid useless calls to sigaction(2)
when libthr is statically referenced from the main binary.
In the process, fix openat(2), swapcontext(2) and setcontext(2)
interposing. The libc symbols were exported at different versions
than libthr interposers. Export both libc and libthr versions from
libc now, with default set to the higher version from libthr.
Remove unused and disconnected swapcontext(3) userspace implementation
from libc/gen.
No objections from: deischen
Tested by: pho, antoine (exp-run) (previous versions)
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
hselasky [Sat, 3 Jan 2015 17:21:19 +0000 (17:21 +0000)]
Rework r276532 a bit. Always avoid recursing into the console drivers
clients, hence they might not handle it very well. This change allows
debugging mutex problems with kernel console drivers when
"debug.witness.skipspin=0" is set in the boot environment.
adrian [Sat, 3 Jan 2015 06:55:58 +0000 (06:55 +0000)]
Add a GPIO output mux configuration method.
The AR934x and later (which will turn up eventually) have a new GPIO
output configuration option - a real MUX rather than a "GPIO or this
function."
For now I'm squirreling it away in the CPU code just so it's done -
I may move this to the GPIO layer later.
Specifically, this is required for setting up some boards that have
external receive side LNA (low noise amplifier) that gets switched on/off
by the on-chip wireless MAC. If we don't add this support for those
boards then we'll end up with really poor performance.
(I don't yet have one of those APs, but it'll likely show up in a week.)
imp [Sat, 3 Jan 2015 03:35:18 +0000 (03:35 +0000)]
Re-support CWARNFLAGS, lost when bsd.sys.mk was removed. Also, support
CWARNFALGS.$file centrally so we don't have to have it in all the
places. Remove a few warning flags that are no longer needed.
Also, always use -Wno-unknown-pragma to (hopefully temporarily) work
around #pragma ident in debug.h in the opensolaris code. Remove some
stale warning suppression that's no longer necessary.
des [Sat, 3 Jan 2015 01:52:06 +0000 (01:52 +0000)]
Belatedly commit the patch for SA-14:21 to head. It was not committed to
head at the time because it's a band-aid, rather than a complete fix, but
the complete fix never materialized.
ian [Fri, 2 Jan 2015 23:46:26 +0000 (23:46 +0000)]
Fix alignment directives in arm asm code after clang 3.5 import.
The ancient gas we've been using interprets .align 0 as align to the
minimum required alignment for the current section. Clang's integrated
assembler interprets it as align to a byte boundary. Fortunately both
assemblers interpret a non-zero value as align to 2^N so just make sure
we have appropriate non-zero values everywhere.
ngie [Fri, 2 Jan 2015 22:55:30 +0000 (22:55 +0000)]
Remove MK_INFO guards in bsd.info.mk per r276556
As a side-effect now info pages will always be built/installed if
MK_INFO == yes, whereas before their presence was conditional based on the
value of MK_INFO
This .mk file might be removed in the future, pending discussion on -arch. For
now unbreak its use outside of src (with the only use in ports according to
bapt being devel/cvs*)
rwatson [Fri, 2 Jan 2015 19:06:27 +0000 (19:06 +0000)]
In mbuf_to_synq_entry(), use M_START() and M_SIZE() to calculate an offset
into mbuf storage, to reduce knowledge about mbuf/cluster layout in the
cxgb device driver.
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