(note that part of 320255 was erroneously MFCed by 322889)
Clarify usage of aio(4) with kqueue(2)
Reviewed by: jhb
MFC after: 3 weeks
Differential Revision: https://reviews.freebsd.org/D11299
r318715:
_umtx_op(2): fix minor manlint issues
- Sort .Xr entries in SEE ALSO section.
- Sort SEE ALSO and STANDARDS sections properly, in terms of the
entire document.
r318717:
cap_enter(2): fix manlint issues
- Sort SEE ALSO section appropriately.
- Correct section for sysctl(9).
r318718:
rctl_add_rule(2): fix manlint warnings
- Fix commas (either missing or misused) after .Nm entries in SYNOPSIS
r318719:
open(2): fix manlint warnings
- Sort SEE ALSO .Xr entries.
- Sort sections (HISTORY comes after STANDARDS).
r318720:
ptrace(2): clean up trailing whitespace
r318721:
kill(2): add missing section for sysctl(9)
Bump __FreeBSD_version.
MFC r320317:
Implement address space guards.
MFC r320338:
Remove stale part of the comment.
MFC r320339:
Correctly handle small MAP_STACK requests.
MFC r320344:
For now, allow mprotect(2) over the guards to succeed regardless of
the requested protection.
MFC r320430:
Treat the addr argument for mmap(2) request without MAP_FIXED flag as
a hint.
MFC r320560 (by alc):
Modify vm_map_growstack() to protect itself from the possibility of the
gap entry in the vm map being smaller than the sysctl-derived stack guard
size.
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).
Approved by: re (gjb)
r315272:
Implement INHERIT_ZERO for minherit(2).
INHERIT_ZERO is an OpenBSD feature.
When a page is marked as such, it would be zeroed
upon fork().
This would be used in new arc4random(3) functions.
PR: 182610
Reviewed by: kib (earlier version)
Differential Revision: https://reviews.freebsd.org/D427
r315370:
The adj_free and max_free values of new_entry will be calculated and
assigned by subsequent vm_map_entry_link(), therefore, remove the
pointless copying.
Submitted by: alc
Add information to open(2) man page about the O_VERIFY flag.
PR: 219262
Reviewed by: bjk wblock
Approved by: sjg (mentor)
Obtained from: Juniper Networks, Inc.
r317845:
Provide a freebsd32 implementation of sigqueue()
The previous misuse of sys_sigqueue() was sending random register or
stack garbage to 64-bit targets. The freebsd32 implementation preserves
the sival_int member of value when signaling a 64-bit process.
Document the mixed ABI implementation of union sigval and the
incompability of sival_ptr with pointer integrity schemes.
Reviewed by: kib, wblock
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D10605
r317846:
Regen post r317845.
MFC with: r317845
Sponsored by: DARPA, AFRL
Add clock_nanosleep()
Add a clock_nanosleep() syscall, as specified by POSIX.
Make nanosleep() a wrapper around it.
Attach the clock_nanosleep test from NetBSD. Adjust it for the
FreeBSD behavior of updating rmtp only when interrupted by a signal.
I believe this to be POSIX-compliant, since POSIX mentions the rmtp
parameter only in the paragraph about EINTR. This is also what
Linux does. (NetBSD updates rmtp unconditionally.)
Copy the whole nanosleep.2 man page from NetBSD because it is complete
and closely resembles the POSIX description. Edit, polish, and reword it
a bit, being sure to keep any relevant text from the FreeBSD page.
Regenerate syscall files.
Relnotes: yes
Sponsored by: Dell EMC
clock_gettime.2: add some clock IDs
Add the CLOCK_PROCESS_CPUTIME_ID and CLOCK_THREAD_CPUTIME_ID clock_id
values to the clock_gettime(2) man page. Reformat the excessively
long paragraph (sentence!) into a tag list.
Sponsored by: Dell EMC
Consistently handle negative or wrapping offsets in the mmap(2) syscalls.
MFC r315158:
Fix two missed places where vm_object offset to index calculation
should use unsigned shift.
Document AF_UNIX control messages in unix(4) only, not split between unix(4)
and recv(2).
Also, warn about LOCAL_CREDS effective uid/gid fields, since the write could
be from a setuid or setgid program (with the explicit SCM_CREDS and
LOCAL_PEERCRED, the credentials are read at such a time that it can be
assumed that the process intends for them to be used in this context).
Rename the 'flags' argument to getfsstat() to 'mode' and validate it.
This argument is not a bitmask of flags, but only accepts a single value.
Fail with EINVAL if an invalid value is passed to 'flag'. Rename the
'flags' argument to getmntinfo(3) to 'mode' as well to match.
This is a followup to r308088.
r312332:
Use SRCTOP where possible and use :H to manipulate .CURDIR to get rid of
unnecessarily long relative path .PATH values with make
r312446 (by emaste):
libc: remove reference to nonexistent lib/locale directory
As far as I can tell this was introduced in r72406 and updated in several
subsequent revisions, but the lib/locale directory it referenced never
existed.
r312451:
Replace dot-dot relative pathing with SRCTOP-relative paths where possible
This reduces build output, need for recalculating paths, and makes it clearer
which paths are relative to what areas in the source tree. The change in
performance over a locally mounted UFS filesystem was negligible in my testing,
but this may more positively impact other filesystems like NFS.
LIBC_SRCTOP was left alone so Juniper (and other users) can continue to
manipulate lib/libc/Makefile (and other Makefile.inc's under lib/libc) as
include Makefiles with custom options.
Discussed with: marcel, sjg
thr_set_name(): silently truncate the given name as needed
Instead of failing with ENAMETOOLONG, which is swallowed by
pthread_set_name_np() anyway, truncate the given name to MAXCOMLEN+1
bytes. This is more likely what the user wants, and saves the
caller from truncating it before the call (which was the only
recourse).
Polish pthread_set_name_np(3) and add a .Xr to thr_set_name(2)
so the user might find the documentation for this behavior.
Sponsored by: Dell EMC
O_NOFOLLOW.
We return [EMLINK] instead of [ELOOP] when trying to open a symlink with
O_NOFOLLOW, so that the original case of [ELOOP] can be distinguished. Code
like cmp -h and xz takes advantage of this.
PR: 214633
Do not obliterate errno value in the main thread during ptrace(2) call on x86.
MFC r304931:
Follow ABI when calling __error from the ptrace(2) wrapper.
MFC r305012:
Rewrite ptrace(2) wrappers in C.
MFC r305022:
Restore the requirement of setting errno to zero before calling ptrace(2).
- Avoid double use of "request" in a single sentence. Instead, describe
aio_sigevent as being used to request notification of the associated
operation's completion. This matches the language used to describe
aio_sigevent in aio(4).
- Simplify the prohibition on modifying buffers while requests are in
flight.
- Fix case mismatch.
- Drop note about not using stack variables. C programmers should be able
to figure out if a stack variable is safe based on the later warning
about the life cycle requirements of control blocks.
- Remove prohibition on modifying the I/O buffer for aio_fsync() since
it does not use an I/O buffer. For aio_mlock(), prohibit modifications
to the mapping (e.g. due to mprotect, munmap, mmap, etc.) but do not
prohibit modifications to the memory backing the buffer (stores into
the pages backing the buffer).
First, PL_FLAG_FORKED events now also set a PL_FLAG_VFORKED flag when
the new child was created via vfork() rather than fork(). Second, a
new PL_FLAG_VFORK_DONE event can now be enabled via the PTRACE_VFORK
event mask. This new stop is reported after the vfork parent resumes
due to the child calling exit or exec. Debuggers can use this stop to
reinsert breakpoints in the vfork parent process before it resumes.
Add a mask of optional ptrace() events.
302900:
Add a test for user signal delivery.
This test verifies we get the correct ptrace event details when a signal
is posted to a traced process from userland.
302902:
Add a mask of optional ptrace() events.
ptrace() now stores a mask of optional events in p_ptevents. Currently
this mask is a single integer, but it can be expanded into an array of
integers in the future.
Two new ptrace requests can be used to manipulate the event mask:
PT_GET_EVENT_MASK fetches the current event mask and PT_SET_EVENT_MASK
sets the current event mask.
The current set of events include:
- PTRACE_EXEC: trace calls to execve().
- PTRACE_SCE: trace system call entries.
- PTRACE_SCX: trace syscam call exits.
- PTRACE_FORK: trace forks and auto-attach to new child processes.
- PTRACE_LWP: trace LWP events.
The S_PT_SCX and S_PT_SCE events in the procfs p_stops flags have
been replaced by PTRACE_SCE and PTRACE_SCX. PTRACE_FORK replaces
P_FOLLOW_FORK and PTRACE_LWP replaces P2_LWP_EVENTS.
The PT_FOLLOW_FORK and PT_LWP_EVENTS ptrace requests remain for
compatibility but now simply toggle corresponding flags in the
event mask.
While here, document that PT_SYSCALL, PT_TO_SCE, and PT_TO_SCX both
modify the event mask and continue the traced process.
302921:
Rename PTRACE_SYSCALL to LINUX_PTRACE_SYSCALL.
303461:
Note that not all optional ptrace events use SIGTRAP.
New child processes attached due to PTRACE_FORK use SIGSTOP instead of
SIGTRAP. All other ptrace events use SIGTRAP.
304009:
Remove description of P_FOLLOWFORK as this flag was removed.
Update to reflect the fact that pipe() is a wrapper around the pipe2()
system call.
Reviewed by: jhb, wblock
Sponsored by: DAPRA, AFRL
Change wording to use function rather than system call in the
description
as well.
Authored by: zeising
Reviewed by: brooks
Approved by: re (gjb)
Sponsored by: DAPRA, AFRL
Alan Somers