Add forward compatibility so that new binaries can run on old
kernels. If the new system call from ino64 isn't available on your
system, then the old one will be used and the results translated. The
stat and statfs families of functions are fully emulated. While not
required by policy, in this case it is helpful to our users to provide
this compatibility. In this case, it allows rollback of the kernel
after installing a new userland should a problem be discovered. It
also prevents foot-shooting if a user does an install before rebooting
with the new kernel. Finally, it allows the use case where one needs
to run new binaries on an old kernel as part of an upgrade process.
The getdirentries family uses tricks that may not work on remote
filesystems. Specifically, it uses a buffer 1/4 the size requested to
get the data from he old syscall.
The code carefully uses direct syscalls for old system calls to avoid
referencing freebsd11_* symbols, which contaminate ld-elf.so.1's
export table due to its use of stat functions, which causes errno to
be incorrect in client programs due to the wrong *stat* function being
resolved in some cases.
This code should removed sometime after 12 is branched.
Tested on: 12-current binaries on a 10.3-beta kernel run and return
consistent results. 12-current kernel and userland with
packages from before ino64 was committed also work.
Differential Revision: https://reviews.freebsd.org/D11185
Reviewed by: kib@, emaste@
In r300388, endnetconfig() was called on nc_handle which would release
the associated netconfig structure, which means tmpnconf->nc_netid
would be a use-after-free.
Solve this by doing endnetconfig() in return paths instead.
Reported by: jemalloc via kevlo
Reviewed by: cem, ngie (earlier version)
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D11288
This also avoids an error from egrep when a header is missing. This can happen
with something like WITHOUT_BLUETOOTH set when searching for
$include_dir/netgraph/bluetooth/include/ng_btsocket.h. The warning was
not an error (from set -e) due to being on the left side of a pipe. Now the
all_headers list is only filled with existing headers.
Reviewed by: ngie
MFC after: 3 days
Sponsored by: Dell EMC Isilon
Replace conditional branches with trampolines to unconditional branches when
jumping to labels within other compilation units. This increases the offset
range from +-1 MiB to +-128 MiB.
Since buildenv exports SYSROOT all of these uses will now look in
WORLDTMP by default.
sys/boot/efi/loader/Makefile
A LIBSTAND hack is no longer required for buildenv.
MFC after: 2 weeks
Sponsored by: Dell EMC Isilon
This syscall has never existed and is not at risk of existing any time soon.
Remove documentation referencing it, which has been wrong since FreeBSD 9.
Reported by: allanjude@
Make syslog(3) resilent to cancellation occuring in supported deferred
mode. Code must unlock syslog_mutex on cancel, install the cleanup
handler.
Diagnosed and tested by: eugen
Discussed with: dchagin
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
This change implements NOTE_ABSTIME flag for EVFILT_TIMER, which
specifies that the data field contains absolute time to fire the
event.
To make this useful, data member of the struct kevent must be extended
to 64bit. Using the opportunity, I also added ext members. This
changes struct kevent almost to Apple struct kevent64, except I did
not changed type of ident and udata, the later would cause serious API
incompatibilities.
The type of ident was kept uintptr_t since EVFILT_AIO returns a
pointer in this field, and e.g. CHERI is sensitive to the type
(discussed with brooks, jhb).
Unlike Apple kevent64, symbol versioning allows us to claim ABI
compatibility and still name the new syscall kevent(2). Compat shims
are provided for both host native and compat32.
Requested by: bapt
Reviewed by: bapt, brooks, ngie (previous version)
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D11025
A previous iteration of the tests I added in r319844 involved free(3), but
that attempt didn't pan out, so I switched to stack allocated buffers instead
of heap allocated ones, making the #include unnecessary.
MFC after: 1 month
MFC with: r319844
gets output via warnx(3)
This helps set expectations for how one might deal with those messages, i.e.,
mute output from /dev/stderr today, since that's where vwarn(3) outputs messages
to today.
MFC after: 1 month
The reboot() system call accepts a mode (RB_AUTOBOOT, RB_HALT, RB_POWEROFF,
or RB_REROOT) as well as zero or more optional flags in 'howto'.
However, RB_AUTOBOOT was only displayed if 'howto' was exactly 0.
Combinations like 'RB_AUTOBOOT | RB_DUMP' were decoded as 'RB_DUMP'.
Instead, imply that RB_AUTOBOOT was specified if none of the other "mode"
flags were specified.
- addition of --libxo colors=xxxxx color map (so I never see "blue")
- fix bugs from -fsanitize=address and =undefined
- utf-8 changes (remove support fore 6 byte utf-8 values, which are "historical")
- add comments
- fix man pages
- update test cases
Submitted by: phil
Reviewed by: sjg
Approved by: sjg (mentor)
The futimens() and utimensat() compat stubs allowed using these functions on
kernels that did not have the system calls yet (10.2, old 11-current).
Also remove the documentation of the [ENOTSUP] error that could occur with
an old kernel.
A -DNO_CLEAN build may fail because the depend files refer to the deleted
files.
Add a new sysdecode_getrusage_who() which decodes the RUSAGE_* constant
passed as the first argument to getrusage(). Use this function in both
kdump and truss to decode the first argument to getrusage().
PR: 215448
Submitted by: Anton Yuzhaninov <citrin+pr@citrin.ru>
MFC after: 1 month
The documentation moved to section 3 several years ago, but
'man cap_rights_get' pulls up cap_rights_limit(2) (which is
MLINKed to cap_rights_get.2) instead of cap_rights_get(3).
MFC after: 1 week
For some reason, we have been inserting the ABI specification into the
middle of the target triple, when building LLVM, like so:
armv6-gnueabi-freebsd12.0
This is the wrong way around. LLVM even auto-canonicalizes it to:
armv6--freebsd12.0-gnueabi
Let's do this the right way in llvm.build.mk instead. While here,
define a proper VENDOR macro which can be overridden easily.
Reviewed by: emaste
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D10846
the #ifdef block to only handle the rest of the logic in the loop in the
#else case.
MFC after: 3 days
Reported by: Coverity
CID: 1346844
Sponsored by: Dell EMC Isilon
The DHCP client is supposed to use the same option request list for
both DHCP discovery and request.
This will also allow us to fill the list in single function.
Reviewed by: bapt
Differential Revision: https://reviews.freebsd.org/D10981
const char *.
This fixes a bogus set of errors from gcc about strdup not being allowed a NULL
argument.
MFC after: 1 week
Sponsored by: Dell EMC Isilon
The primary benefit of these functions is that argument
reduction is done once instead of twice in independent
calls to sin() and cos().
* lib/msun/Makefile:
. Add s_sincos[fl].c to the build.
. Add sincos.3 documentation.
. Add appropriate MLINKS.
* lib/msun/Symbol.map:
. Expose sincos[fl] symbols in dynamic libm.so.
* lib/msun/man/sincos.3:
. Documentation for sincos[fl].
* lib/msun/src/k_sincos.h:
. Kernel for sincos() function. This merges the individual kernels
for sin() and cos(). The merger offered an opportunity to re-arrange
the individual kernels for better performance.
* lib/msun/src/k_sincosf.h:
. Kernel for sincosf() function. This merges the individual kernels
for sinf() and cosf(). The merger offered an opportunity to re-arrange
the individual kernels for better performance.
* lib/msun/src/k_sincosl.h:
. Kernel for sincosl() function. This merges the individual kernels
for sinl() and cosl(). The merger offered an opportunity to re-arrange
the individual kernels for better performance.
* lib/msun/src/math.h:
. Add prototytpes for sincos[fl]().
* lib/msun/src/math_private.h:
. Add RETURNV macros. This is needed to reset fpsetprec on I386
hardware for a function with type void.
* lib/msun/src/s_sincos.c:
. Implementation of sincos() where sin() and cos() were merged into
one routine and possibly re-arranged for better performance.
* lib/msun/src/s_sincosf.c:
. Implementation of sincosf() where sinf() and cosf() were merged into
one routine and possibly re-arranged for better performance.
* lib/msun/src/s_sincosl.c:
. Implementation of sincosl() where sinl() and cosl() were merged into
one routine and possibly re-arranged for better performance.
PR: 215977, 218300
Submitted by: Steven G. Kargl <sgk@troutmask.apl.washington.edu>
MFC after: 1 month
Differential Revision: https://reviews.freebsd.org/D10765
