The function is of limited use and is an almost a direct clone of
memmove/memcpy (with arguments swapped). Introduction of ERMS variants
of string routines would mean avoidable growth of libc.
bcopy will get redefined to a __builtin_memmove later on with this
symbol only left for compatibility.
Reviewed by: kib
Approved by: re (gjb)
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D17539
bcopy is left alone as it is expected to be converted to a C func.
Due to header mess ALIGN_TEXT is temporarily defined explicitly in memmove.S
Reviewed by: kib
Approved by: re (gjb)
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D17538
It is required by POSIX, specified in our man page, and followed by
Linux.
PR: 232072
Reported by: miguel_tete17@hotmail.com
Sponsored by: The FreeBSD Foundation
Approved by: re (gjb)
MFC after: 1 week
See r339205 for details.
An unused ERMS support is retained in the macro. It will be activated
after ifunc support lands.
Reviewed by: kib
Approved by: re (gjb)
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D17405
This is a depessimization, see r334537 for an explanation. Routines
remain significantly slower than they have to be.
bzero was removed from the kernel but remains in libc. Macroify to
accommodate differences to memset (no return value, always setting to 0).
The bzero.S file is left in place due to libc build magic which pulls in
a C variant if a matching .S file is missing.
Reviewed by: kib
Approved by: re (gjb)
Differential Revision: https://reviews.freebsd.org/D17355
Both are significantly slower than hand-coded loops. See r338963 for
kernel commit.
bcmp differs from memcmp by always returning 1 when a difference is
found, as opposed to going for a value bigger or lower than 0
depending on what it is. This means it can do less work. For now the
code is duplicated and modified. This will get deduplicated after
another round of optimization when memcmp will get a longer-term form.
Both tested with the glibc suite. While the suite does not have a test
for bcmp, I created a wrapper routine which verified that values match
(0 vs 0, 1 vs non-zero).
Reviewed by: kib
Approved by: re (gjb)
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D17336
Targets like 'cleandir' must not depend on toolchain capabilities.
Reported by: delphij, Shawn Webb
Approved by: re (kib)
Sponsored by: The FreeBSD Foundation
We expect to introduce optimized libc routines in the near future,
which requires use of a linker that supports ifuncs.
Approved by: re (gjb, kib)
Sponsored by: The FreeBSD Foundation
This leverages CONFS to handle the install of the config file.
Approved by: re (blanket, pkgbase), will (mentor)
Differential Revision: https://reviews.freebsd.org/D17162
This uses relative paths to make it more specific to avoid any potential
future problems with .PATH and leverages CONFS.
libc was picked as the destination location for these because of the syscalls
that use these files as the lowest level place they are referenced.
Approved by: re (gjb), will (mentor)
Differential Revision: https://reviews.freebsd.org/D17163
This uses relative paths to make it more specific to avoid any potential
future problems with .PATH and leverages CONFS.
libc was picked as the destination location for these because of the syscalls
that use these files as the lowest level place they are referenced.
Approved by: re (gjb), will (mentor)
Differential Revision: https://reviews.freebsd.org/D17164
The change resembles what was done in r334537 for kernel routines.
While here take care of i386 variants. Note that primitives remain
suboptimal.
Reviewed by: kib (previous version)
Approved by: re (gjb)
Differential Revision: https://reviews.freebsd.org/D17167
the domain of a socket.
This is helpful when testing and Solaris and Linux have the same
socket option using the same name.
Reviewed by: bcr@, rrs@
Sponsored by: Netflix, Inc.
Differential Revision: https://reviews.freebsd.org/D16791
This will only work if the caller already handles SIGSYS, which is not
always the case.
Address this by checking osreldate instead. Note that because there
was not __FreeBSD_version bump when the system call was added, use
1200061 (r332100) which is the first bump after the introduction of
the system call.
PR: 230762
Reported by: Jenkins via Mark Millard
Reviewed by: cem
Differential Revision: https://reviews.freebsd.org/D16807
ObsoleteFiles.inc:
Remove manual pages for arc4random_addrandom(3) and
arc4random_stir(3).
contrib/ntp/lib/isc/random.c:
contrib/ntp/sntp/libevent/evutil_rand.c:
Eliminate in-tree usage of arc4random_addrandom().
crypto/heimdal/lib/roken/rand.c:
crypto/openssh/config.h:
Eliminate in-tree usage of arc4random_stir().
include/stdlib.h:
Remove arc4random_stir() and arc4random_addrandom() prototypes,
provide temporary shims for transistion period.
lib/libc/gen/Makefile.inc:
Hook arc4random-compat.c to build, add hint for Chacha20 source for
kernel, and remove arc4random_addrandom(3) and arc4random_stir(3)
links.
lib/libc/gen/arc4random.c:
Adopt OpenBSD arc4random.c,v 1.54 with bare minimum changes, use the
sys/crypto/chacha20 implementation of keystream.
lib/libc/gen/Symbol.map:
Remove arc4random_stir and arc4random_addrandom interfaces.
lib/libc/gen/arc4random.h:
Adopt OpenBSD arc4random.h,v 1.4 but provide _ARC4_LOCK of our own.
lib/libc/gen/arc4random.3:
Adopt OpenBSD arc4random.3,v 1.35 but keep FreeBSD r114444 and
r118247.
lib/libc/gen/arc4random-compat.c:
Compatibility shims for arc4random_stir and arc4random_addrandom
functions to preserve ABI. Log once when called but do nothing
otherwise.
lib/libc/gen/getentropy.c:
lib/libc/include/libc_private.h:
Fold __arc4_sysctl into getentropy.c (renamed to arnd_sysctl).
Remove from libc_private.h as a result.
sys/crypto/chacha20/chacha.c:
sys/crypto/chacha20/chacha.h:
Make it possible to use the kernel implementation in libc.
PR: 182610
Reviewed by: cem, markm
Obtained from: OpenBSD
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D16760
Mention abort_handler_s(3) and ignore_handler_s(3), provide
cross-reference from memset(3).
Submitted by: Yuri Pankov <yuripv@yuripv.net>
MFC after: 3 days
Differential revision: https://reviews.freebsd.org/D16797
The function retrieves the thread name previously set by
pthread_set_name_np(3). The name is cached in the process memory.
Requested by: Willem Jan Withagen <wjw@digiware.nl>
Man page update: Yuri Pankov <yuripv@yuripv.net>
Reviewed by: ian (previous version)
Discussed with: arichardson, bjk (man page)
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D16702
jails since FreeBSD 7.
Along with the system call, put the various security.jail.allow_foo and
security.jail.foo_allowed sysctls partly under COMPAT_FREEBSD11 (or
BURN_BRIDGES). These sysctls had two disparate uses: on the system side,
they were global permissions for jails created via jail(2) which lacked
fine-grained permission controls; inside a jail, they're read-only
descriptions of what the current jail is allowed to do. The first use
is obsolete along with jail(2), but keep them for the second-read-only use.
Differential Revision: D14791
Leading '+', '-', and ':' in optstring have special meaning. We briefly
mention that the first two have special meaning in that we say
POSIXLY_CORRECT turns them off, but we don't actually document their
meaning. Add a paragraph to RETURN VALUES explaining how they control
the treatment of non-option arguments.
A leading ':' has no mention; add a note that it suppresses warnings about
missing arguments.
Reviewed by: jilles
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D14142
While this implements a standards-conforming C11 function, there's
implementation details the programmer needs to know. Include those
here. Make changes inspired by comments on the initial review as well,
though mostly this involves stealing the epoch verbage from
gettimeofday(2). Add myself to authors since I've now changed a
substantial amount of this man page.
Remove assert.h and _DIAGASSERT to create a paper-trail of changes
from NetBSD. Specifically didn't fix other style issues since I
don't want this to diverge from the NetBSD original too much and
that's too niggling a change to be worth future merge hassles.
Differential Review: https://reviews.freebsd.org/D16649
Bring in the functionality for timespec_get from NetBSD. I've lightly
edited the .c file to remove _DIAGASSERT because FreeBSD doesn't have
that functionality and the typical #define'ing it to assert isn't
right here. The man page is verbatim from NetBSD, but will be revised
as part of a larger cleanup of the time man pages (they are
inconsistent and vague in all the wrong places).
Differential Review: https://reviews.freebsd.org/D16649
These were found by the Undefined Behavious GsoC project at NetBSD:
Avoid undefined behavior in ftok(3)
Do not change the signedness bit with a left shift operation.
Cast to unsigned integer to prevent this.
ftok.c:56:10, left shift of 123456789 by 24 places cannot be represented
in type 'int'
ftok.c:56:10, left shift of 4160 by 24 places cannot be represented in
type 'int'
Avoid undefined behavior in an inet_addr.c
Do not change the signedness bit with a left shift operation.
Cast to unsigned integer to prevent this.
inet_addr.c:218:20, left shift of 131 by 24 places cannot be represented
in type 'int'
Detected with micro-UBSan in the user mode.
Obtained from: NetBSD
MFC after: 2 weeks
Contrary to the removed comment, the kernel does appear to use the timezone
argument of settimeofday. The comment dates to the BSD4.4 import; I assume it
is just stale.
Rendering of execle was missing a comma between the NULL argument and envp.
For unclear reasons, POSIX' definition of these routines comments out the
mandatory trailing NULL argument. That seems unnecessary and probably
(reasonably) confuses mdoc.
For unclear reasons, POSIX' definition of these routines spells NULL as
"(char *)0." This is needlessly unclear. One guess might be that POSIX
targets more exotic computer architectures than FreeBSD does. Fortunately,
there is no such problem on any reasonable platform for FreeBSD to support.
Spell NULL as NULL.
The comma was probably removed in r117204 while the comment and creative
spelling of NULL were added in r116537 (both 15 years ago).
r336773 removed all things xscale. However, some things xscale are
really armv5. Revert that entirely. A more modest removal will follow.
Noticed by: andrew@
The OLD XSCALE stuff hasn't been useful in a while. The original
committer (cognet@) was the only one that had boards for it. He's
blessed this removal. Newer XSCALE (GUMSTIX) is for hardware that's
quite old. After discussion on arm@, it was clear there was no support
for keeping it.
Differential Review: https://reviews.freebsd.org/D16313
If a timer is updated (re-added) with a different time period
(specified in the .data field of the kevent), the new time period has
no effect; the timer will not expire until the original time has
elapsed. This violates the documented behavior as the kqueue(2) man
page says (in part) "Re-adding an existing event will modify the
parameters of the original event, and not result in a duplicate
entry."
This modification, adapted from a patch submitted by cem@ to PR214987,
fixes the kqueue system to allow updating a timer entry. The
kevent timer behavior is changed to:
* When a timer is re-added, update the timer parameters to and
re-start the timer using the new parameters.
* Allow updating both active and already expired timers.
* When the timer has already expired, dequeue any undelivered events
and clear the count of expirations.
All of these changes address the original PR and also bring the
FreeBSD and macOS kevent timer behaviors into agreement.
A few other changes were made along the way:
* Update the kqueue(2) man page to reflect the new timer behavior.
* Fix man page style issues in kqueue(2) diagnosed by igor.
* Update the timer libkqueue system test to test for the updated
timer behavior.
* Fix the (test) libkqueue common.h file so that it includes
config.h which defines various HAVE_* feature defines, before the
#if tests for such variables in common.h. This enables the use of
the actual err(3) family of functions.
* Fix the usages of the err(3) functions in the tests for incorrect
type of variables. Those were formerly undiagnosed due to the
disablement of the err(3) functions (see previous bullet point).
PR: 214987
Reported by: Brian Wellington <bwelling@xbill.org>
Reviewed by: kib
MFC after: 1 week
Relnotes: yes
Sponsored by: Dell EMC
Differential Revision: https://reviews.freebsd.org/D15778
data from /etc/passwd rather than /etc/master.passwd.
The libc getpwent(3) and related functions automatically read master.passwd
when run by root, or passwd when run by a non-root user. When run by non-
root, getpwent() copes with the missing data by setting the corresponding
fields in the passwd struct to known values (zeroes for numbers, or a
pointer to an empty string for literals). When libutil's pw_scan(3) was
used to parse a line without the root-accessible data, it was leaving
garbage in the corresponding fields.
These changes rename the static pw_init() function used by getpwent() and
friends to __pw_initpwd(), and move it into pw_scan.c so that common init
code can be shared between libc and libutil. pw_scan(3) now calls
__pw_initpwd() before __pw_scan(), just like the getpwent() family does, so
that reading an arbitrary passwd file in either format and parsing it with
pw_scan(3) returns the same results as getpwent(3) would.
This also adds a new pw_initpwd(3) function to libutil, so that code which
creates passwd structs from scratch in some manner that doesn't involve
pw_scan() can initialize the struct to the values expected by lots of
existing code, which doesn't expect to encounter NULL pointers or garbage
values in some fields.
SPE ABI uses the soft-float ABI, which splits doubles into two words. As such,
fabs(3) cannot work on a double directly. It's too costly to convert the
argument pair into a single double to use efdabs, so clear the top bit of the
high word, which is the sign bit.
o The correct value for _JB_SIGMASK is 27.
o The storage size for double-precision floating
point register is 8 bytes.
Submitted by: "James Clarke" <jrtc4@cam.ac.uk>
Reviewed by: markj@
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D16344
The issue found with gcc6 build (originally on illumos, confirmed on FreeBSD).
Mark it __unused.
Differential Revision: https://reviews.freebsd.org/D13109
Remove numactl(1), edit numa(4) to bring it some closer to reality,
provide libc ABI shims for old NUMA syscalls.
Noted and reviewed by: brooks (previous version)
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D16142
No valid FreeBSD binary very called them (they would call lchown and
msync directly) and we haven't supported NetBSD binaries in ages.
This is a respin of r335983 with a workaround for the ancient BFD linker
in the libc stubs.
Reviewed by: kib
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D16193
RB_ASKNAME is no longer instructions to the boot loader to request a
prompt for which kernel to boot. Instead, it asks for what the root
file system to use. RB_INITNAME is unused, and never has been in
FreeBSD as far as I can tell. Remove it from the documentation and fix
comment. RB_SELFTEST and RB_MINIROOT likewise (though they were
completely undocumented). These last three constants can likely just
be deleted as nothing references them (even to set useless bits).
RB_ASKNAME doesn't actually survive reboot, however, so needs to be
communicated to the bootloader via other means. If the bootloader sets
it, though, it will be honored.
No valid FreeBSD binary ever called them (they would call lchown and
msync directly) and we haven't supported NetBSD binaries in ages.
Reviewed by: kib
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D15814
Some applications, notably PostgreSQL, want to call setproctitle()
very often. It's slow. Provide an alternative cheap way of updating
process titles without making any syscalls, instead requiring other
processes (top, ps etc) to do a bit more work to retrieve the data.
This uses a pre-existing code path inherited from ancient BSD, which
always did it that way.
Submitted by: Thomas Munro
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D16111
- Move CSRG IDs into __SCCSID().
- When a file has been copied, consistently use 'From: <tag>' for strings
referencing the version of the source file copied from in the license
block comment.
- Some of the 'From:' tags were using $FreeBSD$ that was being expanded on
each checkout. Fix those to hardcode the FreeBSD tag from the file that
was copied at the time of the copy.
- When multiple strings are present list them in "chronological" order,
so CSRG (__SCCSID) before FreeBSD (__FBSDID). If a file came from
OtherBSD and contains a CSRG ID from the OtherBSD file, use the order
CSRG -> OtherBSD -> FreeBSD.
Reviewed by: imp
Differential Revision: https://reviews.freebsd.org/D15831
This is in preparation for changes to update the various ID strings in
libc's source. CSRG ID strings will use __SCCSID() and there are some
existing uses of __RCSID() for NetBSD ID strings already. These are
generally under either an explicit #if 0 or an #ifdef LIBC_SCCS so are
off by default and this change preserves that existing behavior.
Differential Revision: https://reviews.freebsd.org/D15830
Add vertical space between struct definition and function prototype.
Use "NULL" to describe zero pointers, instead of "zero."
Remove perhaps unclear "can not" and replace. Tag struct member names used
with appropriate tags.
Currently libclang_rt is not provided for cross-building and as such
is not connected to cross-tools. For building clang once in universe
it is likely that libclang_rt won't exist for the universe toolchain
but even if it did it would not support anything but the native arch.
So explicitly check for support before enabling h_raw.
MFC after: 1 week
Reviewed by: dim
Sponsored by: Dell EMC
Differential Revision: https://reviews.freebsd.org/D16012
The handbooks are not installed there anymore. While here, improve the
URLs markup a bit.
Reviewed by: allanjude@
MFC after: 2 weeks
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D15793
Qsort swap code aliases the sorted array elements to ints and longs in
order to do swap by machine words. Unfortunately this breaks with the
full code optimization, e.g. LTO.
See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83201 which seems to
reference code directly copied from libc/stdlib/qsort.c.
PR: 228780
Reported by: mliska@suse.cz
Reviewed by: brooks
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D15714
In the DESCRIPTION, put the more commonly used functions first in the
corresponding sentence, to help catch the eye.
Pull out the note about overlapping buffers to its own paragraph, as it
applies to all routines documented by this page.
Emphasize the potentially surprising strncpy(3) behavior of zero-filling the
remainder of a buffer larger than the source string.
Encourage strlcpy use; remove portability note about strlcpy(3). Adapting a
strlcpy-using code base to a platform that does not provide strlcpy in libc
is so trivial as to not be worth mentioning. (Just copy strlcpy.c out of
any BSD libc, or include and link the pre-packaged libbsd library on non-BSD
platforms.)
Likewise, expand the page's warning about ease of potential misuse to cover
all functions documented herein, and explicitly suggest using strlcpy most
of the time. The text was mostly cribbed from a similar suggestion in
gets(3).
Finally, document the remaining valid use of strncpy -- the rare
fixed-length record with no expectation of nul-termination.
Sponsored by: Dell EMC Isilon
This patch adds a new socket option, SO_REUSEPORT_LB, which allow multiple
programs or threads to bind to the same port and incoming connections will be
load balanced using a hash function.
Most of the code was copied from a similar patch for DragonflyBSD.
However, in DragonflyBSD, load balancing is a global on/off setting and can not
be set per socket. This patch allows for simultaneous use of both the current
SO_REUSEPORT and the new SO_REUSEPORT_LB options on the same system.
Required changes to structures:
Globally change so_options from 16 to 32 bit value to allow for more options.
Add hashtable in pcbinfo to hold all SO_REUSEPORT_LB sockets.
Limitations:
As DragonflyBSD, a load balance group is limited to 256 pcbs (256 programs or
threads sharing the same socket).
This is a substantially different contribution as compared to its original
incarnation at svn r332894 and reverted at svn r332967. Thanks to rwatson@
for the substantive feedback that is included in this commit.
Submitted by: Johannes Lundberg <johalun0@gmail.com>
Obtained from: DragonflyBSD
Relnotes: Yes
Sponsored by: Limelight Networks
Differential Revision: https://reviews.freebsd.org/D11003
Previously, libc.so would initialize its notion of the break address
using _end, a special symbol emitted by the static linker following
the bss section. Compatibility issues between lld and ld.bfd could
cause the wrong definition of _end (libc.so's definition rather than
that of the executable) to be used, breaking the brk()/sbrk()
interface.
Avoid this problem and future interoperability issues by simply not
relying on _end. Instead, modify the break() system call to return
the kernel's view of the current break address, and have libc
initialize its state using an extra syscall upon the first use of the
interface. As a side effect, this appears to fix brk()/sbrk() usage
in executables run with rtld direct exec, since the kernel and libc.so
no longer maintain separate views of the process' break address.
PR: 228574
Reviewed by: kib (previous version)
MFC after: 2 months
Differential Revision: https://reviews.freebsd.org/D15663
Summary:
Added ptrace support for getting/setting the remaining part of the VSX registers
(the part that's not already covered by FPR or VR registers).
This is necessary to add support for VSX registers in debuggers.
Submitted by: Luis Pires
Differential Revision: https://reviews.freebsd.org/D15458
Super pages are supported on non-x86 architectures, so just remove the
incorrect note. While here, change terminology to be consistent with
mmap.2.
MFC after: 1 week
It seems a shame to ruin the patina of the June 4, 1993 date
on abort.3, especially since it still matched the date of
the SCCS ID, but those are the rules.
Reported by: araujo
MFC after: 3 days
Sponsored by: Dell EMC
I didn't know abort2 existed until it was mentioned on a mailing list.
Mention it in related pages so others can find it easily.
MFC after: 3 days
Sponsored by: Dell EMC
As many people has pointed out, using assert(3) shall be not the best approach
to verify if strdup(3) has allocated memory to string.
Reviewed by: imp
MFC after: 4 weeks.
Sponsored by: iXsystems Inc.
Differential Revision: https://reviews.freebsd.org/D15594
The vadvise syscall (aka ovadvise) is undocumented and has always been
implmented as returning EINVAL. Put the syscall under COMPAT11 and
provide a userspace implementation.
Reviewed by: kib
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D15557
More firmly suggest mmap(2) instead.
Include the history of arm64 and riscv shipping without brk/sbrk.
Mention that sbrk(0) produces unreliable results.
Reviewed by: emaste, Marcin Cieślak
MFC after: 3 days
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D15535
Each TCP connection that uses the system default cc_newreno(4) congestion
control algorithm module leaks a "struct newreno" (8 bytes of memory) at
connection initialisation time. The NULL-pointer dereference is only germane
when using the ABE feature, which is disabled by default.
While at it:
- Defer the allocation of memory until it is actually needed given that ABE is
optional and disabled by default.
- Document the ENOMEM errno in getsockopt(2)/setsockopt(2).
- Document ENOMEM and ENOBUFS in tcp(4) as being synonymous given that they are
used interchangeably throughout the code.
- Fix a few other nits also accidentally omitted from the original patch.
Reported by: Harsh Jain on freebsd-net@
Tested by: tjh@
Differential Revision: https://reviews.freebsd.org/D15358
Rtld is not compatible with SSP, and since we link libc_pic.a to rtld
to have the basic support like memory and string copy functions, we
have to both carefully limit libc use, and to provide the ssp support
shims. This change makes the libc use in rtld more straighforward but
still limited, and allows to remove the shims, to be done in the next
commit.
Submitted by: Luis Pires
Reviewed by: bdrewery, brooks
Differential revision: https://reviews.freebsd.org/D15283
Discovered during investigation into the PR - the description of
AT_FDCWD was somewhat confusing.
PR: 222632
Submitted by: Jan Kokemüller <jan.kokemueller@gmail.com>
MFC after: 1 week
This is necessary to make sure that functions that can have stack
protection are not used to update the stack guard. If not, the stack
guard check would fail when it shouldn't.
guard_setup() calls elf_aux_info(), which, in turn, calls memcpy() to
update stack_chk_guard. If either elf_aux_info() or memcpy() have
stack protection enabled, __stack_chk_guard will be modified before
returning from them, causing the stack protection check to fail.
This change uses a temporary buffer to delay changing
__stack_chk_guard until elf_aux_info() returns.
Submitted by: Luis Pires
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D15173
-> PROC_PDEATHSIG_STATUS for consistency with other procctl(2)
operations names.
Requested by: emaste
Sponsored by: The FreeBSD Foundation
MFC after: 13 days
With SOFTFLOAT, libc and libm were built correctly, but any program
including fenv.h itself assumed it was on a hardfloat systen and emitted
inline fpu instructions for fedisableexcept() and friends.
Unlike r315424 which did this for MIPS, I've used riscv_float_abi_soft
and riscv_float_abi_double macros as appropriate rather than using
__riscv_float_abi_soft exclusively. This ensures that attempts to use an
unsupported hardfloat ABI will fail.
Reviewed by: br
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D10039
Allow processes to request the delivery of a signal upon death of
their parent process. Supposed consumer of the feature is PostgreSQL.
Submitted by: Thomas Munro
Reviewed by: jilles, mjg
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D15106
While Arcnet has some continued deployment in industrial controls, the
lack of drivers for any of the PCI, USB, or PCIe NICs on the market
suggests such users aren't running FreeBSD.
Evidence in the PR database suggests that the cm(4) driver (our sole
Arcnet NIC) was broken in 5.0 and has not worked since.
PR: 182297
Reviewed by: jhibbits, vangyzen
Relnotes: yes
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D15057
Originally, on the VAX exect() enable tracing once the new executable
image was loaded. This was possible because tracing was controllable
through user space code by setting the PSL_T flag. The following
instruction is a system call that activated tracing (as all
instructions do) by copying PSL_T to PSL_TP (trace pending). The
first instruction of the new executable image would trigger a trace
fault.
This is not portable to all platforms and the behavior was replaced with
ptrace(PT_TRACE_ME, ...) since FreeBSD forked off of the CSRG repository.
Platforms either incorrectly call execve(), trigger trace faults inside
the original executable, or do contain an implementation of this
function.
The exect() interfaces is deprecated or removed on NetBSD and OpenBSD.
Submitted by: Ali Mashtizadeh <ali@mashtizadeh.com>
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D14989
mdoc treats verbatim quotes in .Dl as a string delimiter and does
not pass them to the rendered output. Use special char \*q to specify
double quote
PR: 216755
MFC after: 3 days
This caching has existed since the CSRG import, but serves no obvious
purpose. Sure, setlogin() is called rarely, but calls to getlogin()
should also be infrequent. The required invalidation was not
implemented on aarch64, arm, mips, amd riscv so updates would never
occur if getlogin() was called before setlogin().
Reported by: Ali Mashtizadeh <ali@mashtizadeh.com>
Reviewed by: kib
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D14965
With r332099 changing syslogd(8) to parse RFC 5424 formatted syslog
messages, go ahead and also change the syslog(3) libc function to
generate them. Compared to RFC 3164, RFC 5424 has various advantages,
such as sub-second precision for log entry timestamps.
As this change could have adverse effects when not updating syslogd(8)
or using a different system logging daemon, add a notice to UPDATING and
increase __FreeBSD_version.
Differential Revision: https://reviews.freebsd.org/D14926
These files are identical to the generated system calls.
In the case of MIPS, the file was already disconnected from the build.
Submitted by: Ali Mashtizadeh <ali@mashtizadeh.com>
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D14976
All of these files are identical (modulo license blocks and VCS IDs) to
the files generated by lib/libc/sys/Makefile.inc and serve no purpose.
Reported by: Ali Mashtizadeh <ali@mashtizadeh.com>
Reviewed by: kib
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D14953
While I'm at it correct the update date in the man page.
Reported by: ed@
MFC after: 2 weeks
X-MFC with: r331936
Differential Revision: https://reviews.freebsd.org/D12785
On older kernels, when userspace program disables SIGSYS, catch ENOSYS and
emulate getrandom(2) syscall with the kern.arandom sysctl (via existing
arc4_sysctl wrapper).
Special care is taken to faithfully emulate EFAULT on NULL pointers, because
sysctl(3) as used by kern.arandom ignores NULL oldp. (This was caught by
getentropy(3) ATF tests.)
Reported by: kib
Reviewed by: kib
Discussed with: delphij
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D14785
The general idea here is to provide userspace programs with well-defined
sources of entropy, in a fashion that doesn't require opening a new file
descriptor (ulimits) or accessing paths (/dev/urandom may be restricted
by chroot or capsicum).
getrandom(2) is the more general API, and comes from the Linux world.
Since our urandom and random devices are identical, the GRND_RANDOM flag
is ignored.
getentropy(3) is added as a compatibility shim for the OpenBSD API.
truss(1) support is included.
Tests for both system calls are provided. Coverage is believed to be at
least as comprehensive as LTP getrandom(2) test coverage. Additionally,
instructions for running the LTP tests directly against FreeBSD are provided
in the "Test Plan" section of the Differential revision linked below. (They
pass, of course.)
PR: 194204
Reported by: David CARLIER <david.carlier AT hardenedbsd.org>
Discussed with: cperciva, delphij, jhb, markj
Relnotes: maybe
Differential Revision: https://reviews.freebsd.org/D14500
document details of salen in getnameinfo(3) manual page.
getnameinfo(3) returned EAI_FAIL when salen was not equal to
the length corresponding to the value specified by sa->sa_family.
However, POSIX or RFC 3493 does not require it and RFC 4038
Sec.6.2.3 shows an example passing sizeof(struct sockaddr_storage)
to salen.
This change makes the requirement less strict by accepting
salen up to sizeof(struct sockaddr_storage). It also includes
two more changes: one is to fix return values because both SUSv4
and RFC 3493 require EAI_FAMILY when the address length is invalid,
another is to fix sa_len dependency in PF_LOCAL.
Pointed out by: Christophe Beauval
Reviewed by: ae
Differential Revision: https://reviews.freebsd.org/D14585
The arm, mips, and riscv MD Symbol.map files listed some (but not all)
of the softfloat symbols that were actually defined in softfloat.c.
While here, also remove entries for __fixuns[sd]fsi which are provided
by libcompiler_rt and not by libc.
Sponsored by: DARPA / AFRL
POSIX defines no macros for these permissions.
Also remove unneeded headers from synopsis.
PR: 225905
Reviewed by: wblock
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D14461
POSIX explicitly states that the application must declare union semun.
This makes no sense, but it is what it is. This brings us into line
with Linux, MacOS/Darwin, and NetBSD.
In a ports exp-run a moderate number of ports fail due to a lack of
approprate autotools-like discovery mechanisms or local patches. A
commit to address them will follow shortly.
PR: 224300, 224443 (exp-run)
Reviewed by: emaste, jhb, kib
Exp-run by: antoine
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D14492
This deliberately breaks the API in preperation for future syscall
revisions which will remove these nonstandard members.
In an exp-run a single port (devel/qemu-user-static) was found to
use them which it did becuase it emulates system calls. This has
been fixed in the ports tree.
PR: 224443 (exp-run)
Reviewed by: kib, jhb (previous version)
Exp-run by: antoine
Sponsored by: DARPA, AFRP
Differential Revision: https://reviews.freebsd.org/D14490
nothing - it was checking for ENXIO, which, with devfs, is no longer
returned - and was badly placed anyway, and replaces it with similar
one that works, and is done just before starting getty, instead of being
done when rereading ttys(5).
From the practical point of view, this makes init(8) handle disappearing
terminals (eg /dev/ttyU*) gracefully, without unneccessary getty restarts
and resulting error messages.
Reviewed by: imp@
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D14307
According to the getpeereid(3) documentation, on failure the value -1 is
returned and the global variable errno is set to indicate the error. We
were returning the error instead.
Obtained from: Apple's Libc-1244.30.3
MFC after: 5 days
C11 standard (ISO/IEC 9899:2011) K.3.7.4.1 The memset_s function
(p: 621-622)
Fix memset(3) portion of the man page by replacing the first argument
(destination) "b" with "dest", which is more descriptive than "b".
This also makes it consistent with the term used in the memset_s()
portion of the man page.
See also http://en.cppreference.com/w/c/string/byte/memset.
Reviewed by: kib
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D13682
The GP register can be clobbered by the callback, so save it in S1
while invoking the callback function.
While here, add a comment expounding on the treatment of GP for the
various ABIs and the assumptions made.
Reviewed by: jmallett (earlier version)
Sponsored by: DARPA / AFRL
Differential Revision: https://reviews.freebsd.org/D14179
objects' init functions instead of doing the setup via a constructor
in libc as the init functions may already depend on these handlers
to be in place. This gets us rid of:
- the undefined order in which libc constructors as __guard_setup()
and jemalloc_constructor() are executed WRT __sparc_utrap_setup(),
- the requirement to link libc last so __sparc_utrap_setup() gets
called prior to constructors in other libraries (see r122883).
For static binaries, crt1.o still sets up the user trap handlers.
o Move misplaced prototypes for MD functions in to the MD prototype
section of rtld.h.
o Sprinkle nitems().
In contrast to the existing NetBSD setcontext_link test, these tests
verify that passing from 1 to 6 arguments through to the callback function
work correctly which can be useful for testing ABIs which split arguments
between registers and the stack.
Sponsored by: DARPA / AFRL
This implementation spills additional arguments on the stack so works
fine with more than 6 arguments. I believe the check was just copied
over from sparc64 (which doesn't support spilling onto the stack)
Sponsored by: DARPA / AFRL
NCARGS isn't a limit on the number of arguments to pass to a function,
but the number of bytes that can be consumed by arguments to exec. As
such, it is not suitable for a limit on the count of arguments passed
to makecontext().
Sponsored by: DARPA / AFRL
- Add a new <machine/abi.h> header to hold constants shared between C
and assembly such as CALLFRAME_SZ.
- Add a new STACK_ALIGN constant to <machine/abi.h> and use it to
replace hardcoded constants in the kernel and makecontext(). As a
result of this, ensure the stack pointer on N32 and N64 is 16-byte
aligned for N32 and N64 after exec(), after pthread_create(), and
when sending signals rather than 8-byte aligned.
Reviewed by: jmallett
Sponsored by: DARPA / AFRL
Differential Revision: https://reviews.freebsd.org/D13875
- N32 and N64 do not have a $a0-3 gap.
- Use 'sp += 4' to skip over the gap for O32 rather than '+= i'. It
doesn't make a functional change, but makes the code match the comment.
Sponsored by: DARPA / AFRL
utilities is done by calling gr_addgid() for each group to be
added (usually found by traversing /etc/group) then calling the
setgroups() system call after the group set has been created.
The gr_addgid() function (helpfully?) deduplicates the addition
of group members. So, if you call it to add a group member that
already exists, it is just dropped. Because group[0] is the
effective group-ID and is over-written when a setgid program
is run, The value in group[0] is usually duplicated so that
group value is not lost when a setgid program is run.
Historically this happened because the group value indicated
in the password file also appears in /etc/group (e.g., if you
are group staff in the password file, you will also appear in
the staff line in /etc/group). But, with the addition of the
deduplication, the attempt to add group staff was lost because
it already appeared in group[0]. So, the fix is to deduplicate
starting from group[1] which allows a duplicate of the entry in
group[0], but not in later entries.
There is some confusion about the setgroups system call because in
BSD it has (always) set the entire group including the egid group
(in group[0]). However, in Linux, it skips over group[0] and starts
setting from group[1]. See this comment from linux_setgroups:
/*
* cr_groups[0] holds egid. Setting the whole set from
* the supplied set will cause egid to be changed too.
* Keep cr_groups[0] unchanged to prevent that.
*/
To make it clear what the BSD setgroups system call does, I
added the following paragraph to the setgroups(2) manual page:
The first entry of the group array (gidset[0]) is used as the effective
group-ID for the process. This entry is over-written when a setgid
program is run. To avoid losing access to the privileges of the
gidset[0] entry, it should be duplicated later in the group array.
By convention, this happens because the group value indicated in the
password file also appears in /etc/group. The group value in the
password file is placed in gidset[0] and that value then gets added a
second time when the /etc/group file is scanned to create the group set.
Reported by: Paul McMath paulm at tetrardus.net
Reviewed by: kib
MFC after: 2 weeks
The man page is years out of date regarding errors. Our implementation _does_
allow unaligned addresses, and it _does_not_ check for negative lengths,
because the length is unsigned. It checks for overflow instead.
Update the tests accordingly.
Reviewed by: bcr
MFC after: 3 weeks
Differential Revision: https://reviews.freebsd.org/D13826
regcomp uses some libc internal collation bits that are not available in the
libregex context. It's easy enough to bring in the needed parts that can
work in a libregex world, so do so.
Pointy hat to: me
libregex is a regex(3) implementation intended to feature GNU extensions and
any other non-POSIX compliant extensions that are deemed worthy.
These extensions are separated out into a separate library for the sake of
not cluttering up libc further with them as well as not deteriorating the
speed (or lack thereof) of the libc implementation.
libregex is implemented as a build of the libc implementation with LIBREGEX
defined to distinguish this from a libc build. The reasons for
implementation like this are two-fold:
1.) Maintenance- This reduces the overhead induced by adding yet another
regex implementation to base.
2.) Ease of use- Flipping on GNU extensions will be as simple as linking
against libregex, and POSIX-compliant compilations can be guaranteed with a
REG_POSIX cflag that should be ignored by libc/regex and disables extensions
in libregex. It is also easier to keep REG_POSIX sane and POSIX pure when
implemented in this fashion.
Tests are added for future functionality, but left disconnected for the time
being while other testing is done.
Reviewed by: cem (previous version)
Differential Revision: https://reviews.freebsd.org/D12934
libc is set for WARNS=2, but the incoming libregex will use WARNS=6.
Sprinkle some casts and (void)bc's to alleviate the warnings that come along
with the higher WARNS level.
These 'bc' parameters could be outright removed, but as of right now they
will be used in some parts of libregex land. Silence the warnings instead
rather than flip-flopping.
userspace to control NUMA policy administratively and programmatically.
Implement domainset based iterators in the page layer.
Remove the now legacy numa_* syscalls.
Cleanup some header polution created by having seq.h in proc.h.
Reviewed by: markj, kib
Discussed with: alc
Tested by: pho
Sponsored by: Netflix, Dell/EMC Isilon
Differential Revision: https://reviews.freebsd.org/D13403
The daemonfd function is equivalent to the daemon(3) function expect that
arguments are descriptors. For example dhclient(8) which is sandboxed is
unable to open /dev/null to close stdio instead it's allows to fail
daemon(3) function to close the descriptors and then do it explicit in code.
Instead of such hacks we can use now daemonfd.
This API can be also helpful to migrate system to platforms like CheriBSD.
Reviewed by: brooks@, bcr@, jilles@ (earlier version)
Differential Revision: https://reviews.freebsd.org/D13433
There are two versions of variant I of TLS
- ARM and aarch64 uses original version of variant I here TP points to
start of TCB followed by aligned TLS segment. Both TCB and TLS must
be aligned to alignment of TLS section. The TCB[0] points to DTV vector
and DTV values are real addresses (without bias).
- MIPS, PowerPC and RISC-V use modified version of variant I,
where TP points (with bias) to TLS and TCB immediately precedes TLS
without any alignment gap. Only TLS should be aligned. The TCB[0]
points to DTV vector and DTV values are biased by constant value (0x8000)
from real addresses.
Take all this in account when allocating memory for TLS structures.
MFC after: 1 month
Reviewed by: kib, mizhka
Tested by: mizhka(on mips)
Differential Revision: https://reviews.freebsd.org/D13378
Now that the POSIX working group is going to require that basename(3)
and dirname(3) are thread-safe in future revisions of the standard,
there is even less of a need to provide basename_r(3). Remove this
function to prevent people from writing code that only builds on
FreeBSD and Bionic.
Removing this function seems to break exactly one port: sbruno@'s
qemu-user-static. I will send him a pull request on GitHub in a bit.
__FreeBSD_version will not be bumped, as any value from 2017 can be used
to test for the presence of a thread-safe basename(3)/dirname(3).
PR: https://bugs.freebsd.org/224016
Currently each call to telldir() requires a malloc and adds an entry to a
linked list which must be traversed on future telldir(), seekdir(),
closedir(), and readdir() calls. Applications that call telldir() for every
directory entry incur O(n^2) behavior in readdir() and O(n) in telldir() and
closedir().
This optimization eliminates the malloc() and linked list in most cases by
packing the relevant information into a single long. On 64-bit architectures
msdosfs, NFS, tmpfs, UFS, and ZFS can all use the packed representation. On
32-bit architectures msdosfs, NFS, and UFS can use the packed
representation, but ZFS and tmpfs can only use it for about the first 128
files per directory. Memory savings is about 50 bytes per telldir(3) call.
Speedup for telldir()-heavy directory traversals is about 20-30x for one
million files per directory.
Reviewed by: kib, mav, mckusick
MFC after: 3 weeks
Sponsored by: Spectra Logic Corp
Differential Revision: https://reviews.freebsd.org/D13385
matching failure.
According to the Open Group documentation for fwscanf:
"Upon successful completion, these functions shall return the number of
successfully matched and assigned input items; this number can be zero in
the event of an early matching failure."
Without this change, fwscanf would return EOF in the case of an early
matching failure, instead of the proper return value of 0.
This change aligns fwscanf(3) with the implementation in fscanf(3).
PR: 202240
Submitted by: rajendra.sy@gmail.com
Reviewed by: jhb, cem
Approved by: sjg (mentor)
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D13288
Using
.symver foo,foo@@VER
causes foo and foo@@VER to be output to the .o file. This requires foo
to be weak since the linker handles foo@@VER as foo.
Using
.symver foo,foo@@@VER
causes just foo@@ver to be output and avoid the need for making foo
weak. It also reduces the constraint on how exactly a linker has to
handle foo and foo@@VER being present.
Submitted by: Rafael Espíndola
Reviewed by: dim, kib
Differential Revision: https://reviews.freebsd.org/D11653
system calls. Man pages are missing for v2 and v5, so any entries for
those versions were inferred by new implementations of these functions
in libc.
Obtained from: http://www.tuhs.org/cgi-bin/utree.pl
It would previously return negative zero for -0.0 since -0.0 does not
compare less than 0. The issue was discovered when running the libc++
test suite on softfloat MIPS64.
I have verified that both clang and GCC generate sensible code for the
builtin. For soft float they clear the sign bit using integer operations
and in hard float mode they use abs.d.
Reviewed by: #mips, jhb, brooks, imp, emaste
Approved by: jhb (mentor)
Differential Revision: https://reviews.freebsd.org/D13135
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using mis-identified many licenses so this was mostly a manual - error
prone - task.
The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
Mainly focus on files that use BSD 3-Clause license.
The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.
The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.
Initially, only tag files that use BSD 4-Clause "Original" license.
RelNotes: yes
Differential Revision: https://reviews.freebsd.org/D13133
Do not use macros in the -width of a .Bl, since mandoc does not support them.
Fix issues reported by igor and mandoc -Tlint.
Use a .Bl for list of clock IDs instead of a comma list.
MFC after: 3 days
Sponsored by: Dell EMC
Add notes to each of these that specifically state that results are
undefined if the strings overlap. In the case of memcpy, we document
the overlapping behavior on FreeBSD (pre-existing). For str*, it is
left unspecified, however, since the default (and x86) implementations
do not handle overlapping strings properly.
PR: 223653
Sponsored by: Netflix
As of r325320 posix_fallocate returns EINVAL on ZFS to indicate that
the underlying filesystem does not support this operation, per
POSIX.1-2008. Document this case in the man page.
MFC after: 20 days
MFC with: r325320
Sponsored by: The FreeBSD Foundation
For statically linked binaries, where all relocation are solved by static
linker, the linker expect that offset to TLS section is aligned. Additionaly,
to maintain absolute alignment, TLS TCB should by also aligned.
Obtained from: CheriBSD (initial version)
MFC after: 1 month
Reviewed by: brooks (previous version), kib
Differential Revision: https://reviews.freebsd.org/D12907
{}'s around the if (c == EOF) block to prevent potential 'trailing else'
issues from being introduced when refactoring. As my gets_s() code
is based on this, it makes sense to fix the same issue here first
here and now, then do an svn copy again to capture this history).
Suggested by: ed@ in D12785
The bug is an out-of-bounds read detected with address sanitizer that
happens when 'sp' in p_b_coll_elems() includes NUL byte[s], e.g. if it's
equal to "GS\x00". In that case len will be equal to 4, and the
strncmp(cp->name, sp, len) call will succeed when cp->name is "GS" but the
cp->name[len] == '\0' comparison will cause the read to go out-of-bounds.
Checking the length using strlen() instead eliminates the issue.
The bug was found in LLVM with oss-fuzz:
https://reviews.llvm.org/D39380
MFC after: 1 week
Obtained from: Vlad Tsyrklevich through posting on openbsd-tech
RB_POWERCYCLE instructs the platform to power off and then power back
on a short time later, if that's possible. Otherwise, degrade to the
RB_POWEROFF behavior.
Sponsored by: Netflix
In r322258 I made p1003_1b.aio_listio_max a tunable. However, further
investigation shows that there was never any good reason for that limit to
exist in the first place. It's used in two completely different ways:
* To size a UMA zone, which globally limits the number of concurrent
aio_suspend calls.
* To artifically limit the number of operations in a single lio_listio call.
There doesn't seem to be any memory allocation associated with this limit.
This change does two things:
* Properly names aio_suspend's UMA zone, and sizes it based on a new constant.
* Eliminates the artifical restriction on lio_listio. Instead, lio_listio
calls will now be limited by the more generous max_aio_queue_per_proc. The
old p1003_1b.aio_listio_max is now an alias for
vfs.aio.max_aio_queue_per_proc, so sysconf(3) will still work with
_SC_AIO_LISTIO_MAX.
Reported by: bde
Reviewed by: jhb
MFC after: 3 weeks
Sponsored by: Spectra Logic Corp
Differential Revision: https://reviews.freebsd.org/D12120
one call to sysctl(2) from jemalloc startup code. (That also requires
changes to jemalloc, but I plan to push those to upstream first.)
Reviewed by: kib
MFC after: 2 weeks
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D12745
- Teach elf aux vector functions about newly added AT_HWCAP and AT_HWCAP2
vectors.
- Export _elf_aux_info() as new public libc function elf_aux_info(3)
The elf_aux_info(3) should be considered as FreeBSD counterpart of glibc
getauxval() with more robust interface.
Note:
We cannot name this new function as getauxval(), with glibc compatible
interface. Some ports autodetect its existence and then expects that all
Linux specific AT_<*> vectors are defined and implemented.
MFC after: 1 month
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D12743
In FreeBSD 11 and later debug.iosize_max_clamp defaults to 0, and the
maximum nbytes count for write(2) is SSIZE_MAX. Update the man page to
document this, and mention the sysctl that can be set to obtain the
previous behaviour.
PR: 196666
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
posix_fallocate is logically equivalent to writing zero blocks to the
desired file size and there is no reason to prevent calling it in
capability mode. posix_fallocate already checked for the CAP_WRITE
right, so we merely need to list it in capabilities.conf.
Reviewed by: allanjude
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D12640
Make armv7 as a new MACHINE_ARCH.
Copy all the places we do armv6 and add armv7 as basically an
alias. clang appears to generate code for armv7 by default. armv7 hard
float isn't supported by the the in-tree gcc, so it hasn't been
updated to have a new default.
Support armv7 as a new valid MACHINE_ARCH (and by extension
TARGET_ARCH).
Add armv7 to the universe build.
Differential Revision: https://reviews.freebsd.org/D12010
On Variant I TLS architectures (aarch64, arm, mips, powerpc, and riscv)
the __libc_allocate_tls function allocates thread local storage memory
with calloc(). It then copies initialization data over the portions with
non-zero initial values. Before this change it would then pointlessly
zero the already zeroed remainder of the storage. Unfortunately the
calculation was wrong and it would zero TLS_TCB_SIZE (2*sizeof(void *))
additional bytes.
In practice, this overflow only matters if the TLS segment is sized such
that calloc() allocates a less than TLS_TCB_SIZE extra memory. Even
then, the likely result will be zeroing part of the next bucket. This
coupled with the impact being confined to Tier II platforms means there
will be no security advisory for this issue.
Reviewed by: kib, dfr
Discussed with: security-officer (delphij)
MFC after: 1 week
Found by: CHERI
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D12547
Also fix the style of the asprintf(3) call in __collate_load_tables_l().
Both of these lines were modified away from snprintf(3) during the
import from DragonFly/Illumos.
Reviewed by: jilles (briefly over shoulder)
MFC after: 2 weeks
Sponsored by: Dell EMC Isilon
After r308212 Capsicum permits .. lookups in capability mode, as long as
path component traversal does not escape the directory corresponding to
the provided file descriptor.
We should add a description of the vfs.lookup_cap_dotdot and
vfs.lookup_cap_dotdot_nonlocal sysctls, perhaps as a cross-reference to
capsicum(4). I intend to look at that soon.
Reviewed by: bjk, cem, kib
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D12343
Illumos and Schillix is adopting some of the locale code and our style(9)
sometimes matches the Solaris cstyle, so the changes are also useful as a
way to reduce diffs.
No functional change.
Discussed with: Joerg Schilling
MFC after: 1 week
getmntinfo(3) is designed around a relatively static or slow growing set of
current mounts. It tried to detect a race with somewhat concurrent mount
and re-call getfsstat(2) in that case, looping indefinitely. It also
allocated space for a single extra mount as slop.
In the case where the user has a large number of mounts and is adding them
at a rapid pace, it fell over.
This patch makes two functional changes:
1. Allocate even more slop. Double whatever the last getfsstat(2) returned.
2. Abort and return some known results after looping a few times
(arbitrarily, 3). If the list is constantly changing, we can't guarantee
we return a full result to the user at any point anyways.
While here, add very basic functional tests for getmntinfo(3) to the libc
suite.
PR: 221743
Submitted by: Peter Eriksson <peter AT ifm.liu.se> (earlier version)
Sponsored by: Dell EMC Isilon
These builtins were listed in the mips-specific Symbol.map for libc but
were not implemented. Compiling mips with recent clang requires these
symbols.
Sponsored by: DARPA / AFRL
instructions, if supported both by CPU and kernel.
Reviewed by: jhb (previous version)
Tested by: pho (previous version)
Sponsored by: The FreeBSD Foundation
MFC after: 3 weeks
Differential revision: https://reviews.freebsd.org/D12023
lld can successfully link most of a working i386 userland and kernel,
but produces a broken libc. For now if we're otherwise using lld, and
ld.bfd is available, explicitly use it for libc.
Sponsored by: The FreeBSD Foundation
Non-tests/... changes:
- Add HAS_TESTS= to Makefiles with libraries and programs to enable iteration
and propagate the appropriate environment down to *.test.mk.
tests/... changes:
- Add appropriate support Makefile.inc's to set HAS_TESTS in a minimal manner,
since tests/... is a special subdirectory tree compared to the others.
MFC after: 2 months
MFC with: r322511
Reviewed by: arch (silence), testing (silence)
Differential Revision: D12014
On i386 with CPUID but without SSE2, set lfence_works to LMB_NONE
instead of looping.
Reported and tested by: Andre Albsmeier <andre@fbsd.e4m.org>
Sponsored by: The FreeBSD Foundation
MFC after: 3 days
S_IRUSR is defined in sys/stat.h
PR: 209229
Submitted by: <mt AT markoturk DOT info>
Approved by: bcr (mentor)
MFC after: 5 days
Differential Revision: https://reviews.freebsd.org/D12007
abort_handler_s() currently simply calls abort(), though the standard
specifies more: "Writes an implementation-defined message to stderr
which must include the string pointed to by msg and calls abort()."
memset_s() is missing error condition "n > smax", and does not invoke
the constraint handler after filling the buffer: "following errors are
detected at runtime and call the currently installed constraint
handler function after storing ch in every location of the destination
range [dest, dest+destsz) if dest and destsz are themselves valid",
one of the errors is "n > smax" itself.
Submitted by: Yuri Pankov <yuripv@gmx.com>
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D11991
In a recent interpretation[1], "\\" shall return a non-zero value
(indicating either no match or an error).
The fix involves a change over r254091 and now the behavior matches the
Sun/IBM/HP closed source implementations and also likely musl libc.
Submitted by: Joerg Schilling <joerg at schily.net>
MFC after: 1 week
[1] http://austingroupbugs.net/view.php?id=806
New version is not compatible on supervisor mode with v1.9.1
(previous version).
Highlights:
o BBL (Berkeley Boot Loader) provides no initial page tables
anymore allowing us to choose VM, to build page tables manually
and enable MMU in S-mode.
o SBI interface changed.
o GENERIC kernel.
FDT is now chosen standard for RISC-V hardware description.
DTB is now provided by Spike (golden model simulator). This
allows us to introduce GENERIC kernel. However, description
for console and timer devices is not provided in DTB, so move
these devices temporary to nexus bus.
o Supervisor can't access userspace by default. Solution is to
set SUM (permit Supervisor User Memory access) bit in sstatus
register.
o Compressed extension is now turned on by default.
o External GCC 7.1 compiler used.
o _gp renamed to __global_pointer$
o Compiler -march= string is now in use allowing us to choose
required extensions (compressed, FPU, atomic, etc).
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D11800
Apply the changes from upstream jemalloc 048c6679. This is actually not
quite a cherry pick due to makefile difference and because FreeBSD does
not carry the msvc project files which were also modified in that
commit.
Approved by: jasone (maintainer), markj (mentor)
Sponsored by: Dell EMC Isilon
Adding features for matching is fairly straightforward, but this requires
some duplication because of this fast/slow setup. They can be fairly
trivially combined into a single walk(), so do it to make future additions
less error prone.
Reviewed by: cem (earlier version), emaste, pfg
Approved by: emaste (mentor)
Differential Revision: https://reviews.freebsd.org/D11233
Currently, regex(3) exhibits the following wrong behavior as demonstrated
with sed:
- echo "a{1,2,3}b" | sed -r "s/{/_/" (1)
- echo "a{1,2,3}b" | sed "s/\}/_/" (2)
- echo "a{1,2,3}b" | sed -r "s/{}/_/" (3)
Cases (1) and (3) should throw errors but they actually succeed, and (2)
throws an error when it should match the literal '}'. The correct behavior
was decided by comparing to the behavior with the equivalent BRE (1)(3) or
ERE (2) and consulting POSIX, along with some reasonable evaluation.
Tests were also adjusted/added accordingly.
PR: 166861
Reviewed by: emaste, ngie, pfg
Approved by: emaste (mentor)
MFC after: never
Differential Revision: https://reviews.freebsd.org/D10315
o Replace __riscv64 with (__riscv && __riscv_xlen == 64)
This is required to support new GCC 7.1 compiler.
This is compatible with current GCC 6.1 compiler.
RISC-V is extensible ISA and the idea here is to have built-in define
per each extension, so together with __riscv we will have some subset
of these as well (depending on -march string passed to compiler):
__riscv_compressed
__riscv_atomic
__riscv_mul
__riscv_div
__riscv_muldiv
__riscv_fdiv
__riscv_fsqrt
__riscv_float_abi_soft
__riscv_float_abi_single
__riscv_float_abi_double
__riscv_cmodel_medlow
__riscv_cmodel_medany
__riscv_cmodel_pic
__riscv_xlen
Reviewed by: ngie
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D11901
directories to SUBDIR.${MK_TESTS} idiom
This is being done to pave the way for future work (and homogenity) in
^/projects/make-check-sandbox .
No functional change intended.
MFC after: 1 weeks
