The previous code required that the return type be a single word. This
allows it to be a pointer without using a typedef.
Update the return types of break, mmap, and shmat to be void * as
declared. This only effects systrace output in-tree, but can aid in
generating system call wrappers from syscalls.master.
Reviewed by: kib
Obtained from: CheriBSD
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D17873
Leave ptrace(2) alone for the moment as it's defined to take a caddr_t.
Reviewed by: kib
Obtained from: CheriBSD
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D17852
linux_ioctl_(un)register_handler that allows other driver modules to
register ioctl handlers. The ioctl syscall implementation in each Linux
compat module iterates over the list of handlers and forwards the call to
the appropriate driver. Because the registration functions have the same
name in each module it is not possible for a driver to support both 32 and
64 bit linux compatibility.
Move the list of ioctl handlers to linux_common.ko so it is shared by
both Linux modules and all drivers receive both 32 and 64 bit ioctl calls
with one registration. These ioctl handlers normally forward the call
to the FreeBSD ioctl handler which can handle both 32 and 64 bit.
Keep the special COMPAT_LINUX32 ioctl handlers in linux.ko in a separate
list for now and let the ioctl syscall iterate over that list first.
Later, COMPAT_LINUX32 support can be added to the 64 bit ioctl handlers
via a runtime check for ILP32 like is done for COMPAT_FREEBSD32 and then
this separate list would disappear again. That is a much bigger effort
however and this commit is meant to be MFCable.
This enables linux64 support in x11/nvidia-driver*.
PR: 206711
Reviewed by: kib
MFC after: 3 days
These arguments are mostly paths handled by NAMEI*() macros which already
take const char * arguments.
This change improves the match between syscalls.master and the public
declerations of system calls.
Reviewed by: kib (prior version)
Obtained from: CheriBSD
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D17812
This is more clear and produces better results when generating function
stubs from syscalls.master.
Reviewed by: kib, emaste
Obtained from: CheribSD
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D17784
ioctl(2) commands only have meaning in the context of a file descriptor
so translating them in the syscall layer is incorrect.
The new handler users an accessor to retrieve/construct a pointer from
the last member of the passed structure and relies on type punning to
access the other member which requires no translation.
Unlike r339174 this change supports both places FIODGNAME is handled.
Reviewed by: kib
Obtained from: CheriBSD
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D17475
Flags prevent open(2) and *at(2) vfs syscalls name lookup from
escaping the starting directory. Supposedly the interface is similar
to the same proposed Linux flags.
Reviewed by: jilles (code, previous version of manpages), 0mp (manpages)
Discussed with: allanjude, emaste, jonathan
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D17547
The restruct qualifier is intended to aid code generation in the
compiler, but the only access to storage through these pointers is via
structs using copyin/copyout and the like which can not be written in C
or C++ and thus the compiler gains nothing from the qualifiers.
As such, the qualifiers add no value in current usage.
Reviewed by: kib
Obtained from: CheriBSD
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D17574
Currently the compiler picks up the definition in machine/cpufunc.h.
Add compiler memory barriers to read* and write*. The Linux x86
implementation of these functions uses inline asm with "memory" clobber.
The Linux x86 implementation of read_relaxed* and write_relaxed* uses the
same inline asm without "memory" clobber.
Implement ioread* and iowrite* in terms of read* and write* so they also
have memory barriers.
Qualify the addr parameter in write* as volatile.
Like Linux, define macros with the same name as the inline functions.
Only define 64-bit versions on 64-bit architectures because generally
32-bit architectures can't do atomic 64-bit loads and stores.
Regroup the functions a bit and add brief comments explaining what they do:
- __raw_read*, __raw_write*: atomic, no barriers, no byte swapping
- read_relaxed*, write_relaxed*: atomic, no barriers, little-endian
- read*, write*: atomic, with barriers, little-endian
Add a comment that says our implementation of ioread* and iowrite*
only handles MMIO and does not support port IO.
Reviewed by: hselasky
MFC after: 3 days
Both ^/sys/compat/freebsd32/syscalls.master and ^/sys/kern/syscalls.master
cited "COMPAT[n] #ifdef" instead of "COMPAT_FREEBSD[n] #ifdef" in places.
Approved by: re (glebius)
ioctl(2) commands only have meaning in the context of a file descriptor
so translating them in the syscall layer is incorrect.
The new handler users an accessor to retrieve/construct a pointer from
the last member of the passed structure and relies on type punning to
access the other member which requires no translation.
Reviewed by: kib
Approved by: re (rgrimes, gjb)
Obtained from: CheriBSD
Sponsored by: DARPA, AFRL
Differential Review: https://reviews.freebsd.org/D17388
ioctl(2) commands only have meaning in the context of a file descriptor
so translating them in the syscall layer is incorrect.
The new handler users an accessor to retrieve/construct a pointer from
the last member of the passed structure and relies on type punning to
access the other members which require no translation.
Reviewed by: kib (prior version), jhb
Approved by: re (rgrimes)
Obtained from: CheriBSD
Sponsored by: DARPA, AFRL
Differential Review: https://reviews.freebsd.org/D17378
This is mostly a cosmetic change except that obsolete system calls are
assigned meaningful names in the names arrays which means that using
tools like kdump or truss against binaries invoking these system calls
will print out the name instead of the number. The script I use to
generate the XML list of syscalls for GDB also ignores UNIMPL but not
OBSOL entries. In general UNIMPL should only be used to reserve
placeholders for system calls that have never been implemented while
system calls that existed at one time in FreeBSD but were removed
should be marked OBSOL instead.
Reviewed by: brooks, kib, imp
Approved by: re (gjb)
Differential Revision: https://reviews.freebsd.org/D17344
The pre-7.x compat for both native and 32-bit code was already in
pci_user.c. Use this infrastructure to add implement 32-bit support.
This is more correct as ioctl(2) commands only have meaning in the
context of a file descriptor.
Reviewed by: kib
Approved by: re (gjb)
Obtained from: CheriBSD
Sponsored by: DARPA, AFRL
Differential revision: https://reviews.freebsd.org/D17324
Or else it triggers the following bug:
APIC: CPU 6 has ACPI ID 6
APIC: CPU 7 has ACPI ID 7
panic: vm_wait in early boot
cpuid = 0
time = 1
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xffffffff826ff8d0
vpanic() at vpanic+0x1a3/frame 0xffffffff826ff930
panic() at panic+0x43/frame 0xffffffff826ff990
vm_wait_domain() at vm_wait_domain+0xf9/frame 0xffffffff826ff9c0
kmem_alloc_contig_domain() at kmem_alloc_contig_domain+0x252/frame 0xffffffff826ffa50
kmem_alloc_contig() at kmem_alloc_contig+0x6c/frame 0xffffffff826ffad0
contigmalloc() at contigmalloc+0x2e/frame 0xffffffff826ffb00
x86bios_modevent() at x86bios_modevent+0x225/frame 0xffffffff826ffb20
module_register_init() at module_register_init+0xc0/frame 0xffffffff826ffb50
mi_startup() at mi_startup+0x118/frame 0xffffffff826ffb70
start_kernel() at start_kernel+0x10
While there also make x86bios_unmap_mem idempotent.
Reviewed by: kib
Approved by: re (gjb)
Sponsored by: Citrix Systems R&D
Differential revision: https://reviews.freebsd.org/D17000
error in the function hypercall_memfree(), where the wrong arena was being
passed to kmem_free().
Introduce a per-page flag, VPO_KMEM_EXEC, to mark physical pages that are
mapped in kmem with execute permissions. Use this flag to determine which
arena the kmem virtual addresses are returned to.
Eliminate UMA_SLAB_KRWX. The introduction of VPO_KMEM_EXEC makes it
redundant.
Update the nearby comment for UMA_SLAB_KERNEL.
Reviewed by: kib, markj
Discussed with: jeff
Approved by: re (marius)
Differential Revision: https://reviews.freebsd.org/D16845
became unused in FreeBSD 12.x as a side-effect of the NUMA-related
changes.)
Reviewed by: kib, markj
Discussed with: jeff, re@
Differential Revision: https://reviews.freebsd.org/D16825
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
If a recvmsg(2) or recvmmsg(2) caller doesn't provide sufficient space
for all control messages, the kernel sets MSG_CTRUNC in the message
flags to indicate truncation of the control messages. In the case
of SCM_RIGHTS messages, however, we were failing to dispose of the
rights that had already been externalized into the recipient's file
descriptor table. Add a new function and mbuf type to handle this
cleanup task, and use it any time we fail to copy control messages
out to the recipient. To simplify cleanup, control message truncation
is now only performed at control message boundaries.
The change also fixes a few related bugs:
- Rights could be leaked to the recipient process if an error occurred
while copying out a message's contents.
- We failed to set MSG_CTRUNC if the truncation occurred on a control
message boundary, e.g., if the caller received two control messages
and provided only the exact amount of buffer space needed for the
first.
PR: 131876
Reviewed by: ed (previous version)
MFC after: 1 month
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D16561
Add the ioctl PCIOCBARMMAP on /dev/pci to conveniently create
userspace mapping of a PCI device BAR. This is enormously superior to
read the BAR value with PCIOCREAD and then try to mmap /dev/mem, and
should allow to automatically activate the mapped BARs when needed in
future.
Current implementation creates new sg pager for each user mmap
request. If the pointer (and reference) to a managed device pager is
stored in pci_map, we would be able to revoke all mappings on the BAR
deactivation or relocation. This is related to the unimplemented BAR
activation on mmap, and is postponed for the future.
Discussed with: imp, jhb
Sponsored by: The FreeBSD Foundation, Mellanox Technologies
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D15583
The interface uses struct timespec, which needs a translation.
Reported and reviewed by: asomers
PR: 230175
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D16525
The timespecadd(3) family of macros were imported from NetBSD back in
r35029. However, they were initially guarded by #ifdef _KERNEL. In the
meantime, we have grown at least 28 syscalls that use timespecs in some
way, leading many programs both inside and outside of the base system to
redefine those macros. It's better just to make the definitions public.
Our kernel currently defines two-argument versions of timespecadd and
timespecsub. NetBSD, OpenBSD, and FreeDesktop.org's libbsd, however, define
three-argument versions. Solaris also defines a three-argument version, but
only in its kernel. This revision changes our definition to match the
common three-argument version.
Bump _FreeBSD_version due to the breaking KPI change.
Discussed with: cem, jilles, ian, bde
Differential Revision: https://reviews.freebsd.org/D14725
According to the man page, getrusage(2) should return EFAULT if the rusage
argument lies outside of the process's address space. But due to an
oversight in r100384, that's never been the case during 32-bit emulation.
Fix it.
PR: 230153
Reported by: tests(7)
Reviewed by: cem
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D16500
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
On arm64 (and possible other architectures) we are unable to use static
DPCPU data in kernel modules. This is because the compiler will generate
PC-relative accesses, however the runtime-linker expects to be able to
relocate these.
In preparation to fix this create two macros depending on if the data is
global or static.
Reviewed by: bz, emaste, markj
Sponsored by: ABT Systems Ltd
Differential Revision: https://reviews.freebsd.org/D16140
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
Previously the linuxulator's linux_brk invoked the FreeBSD sys_break
syscall implementation directly. Instead, move the bulk of the existing
implementation to kern_break, and call that from both sys_break and
linux_brk.
This also addresses a minor bug in linux_brk in that we now return the
actual (rounded up) break address, rather than the requested value.
Reviewed by: brooks (earlier version)
Sponsored by: Turing Robotic Industries
Differential Revision: https://reviews.freebsd.org/D16019
The Linux /proc/stat entry has grown over time
v2.5.41 <
user, nice, system, idle
v2.5.41
user, nice, system, idle, iowait, irq
v2.6.11
user, nice, system, idle, iowait, irq, softirq, steal
v2.6.24
user, nice, system, idle, iowait, irq, softirq, steal, guest
v2.6.32 >
user, nice, system, idle, iowait, irq, softirq, steal, guest, guest_nice
Some applications (e.g. nodejs) depend on the correct number of entries
and will abort otherwise.
Fix is to print the correct number of entries based on the value of
osrelease set either in sysctl or the jail settings. Change is similar
to approach used by illumos.
Reviewed by: emaste, imp (mentor)
Approved by: imp (mentor)
Differential Revision: https://reviews.freebsd.org/D15858
The Linux compatibility code was converting the version number (e.g.
2.6.32) in two different ways and then comparing the results.
The linux_map_osrel() function converted MAJOR.MINOR.PATCH similar to
what FreeBSD does natively. I.e. where major=v0, minor=v1, and patch=v2
v = v0 * 1000000 + v1 * 1000 + v2;
The LINUX_KERNVER() macro, on the other hand, converted the value with
bit shifts. I.e. where major=a, minor=b, and patch=c
v = (((a) << 16) + ((b) << 8) + (c))
The Linux kernel uses the later format via the KERNEL_VERSION() macro in
include/generated/uapi/linux/version.h
Fix is to use the LINUX_KERNVER() macro in linux_map_osrel() as well as
in the .trans_osrel functions.
PR: 229209
Reviewed by: emaste, cem, imp (mentor)
Approved by: imp (mentor)
Differential Revision: https://reviews.freebsd.org/D15952
So that the ptrace code will catch it and report it to attached
debugger. Enables debugging of threaded Linux binaries with FreeBSD
debugger.
Submitted by: Yanko Yankulov <yanko.yankulov@gmail.com>
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D15880
Linux 2.6.26 introduced 64-bit capability sets. Extend our stub
implementation to handle both 32- and 64-bit. (We still report no
capabilities in capget, and disallow any in capset.)
Reviewed by: chuck
Sponsored by: Turing Robotic Industries Inc.
Differential Revision: https://reviews.freebsd.org/D15887
Casting from rman_res_t to a pointer results in "cast to pointer from
integer of different size" warnings with base gcc on i386, so use an
intermediate cast to uintptr_t to suppress it. In this case, the I/O
port range is effectively limited to the range of 0..65535.
Reviewed by: imp
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D15746
This adds linprocfs support for proc/sys/vm/min_free_kbytes which the
free program requires for correct operation. The approach mirrors the
approach used in illumos.
Reviewed by: imp (mentor), emaste
Approved by: imp (mentor)
Differential Revision: https://reviews.freebsd.org/D15563
Existing linuxulator platforms (i386, amd64) support legacy syscalls,
such as non-*at ones like open, but arm64 and other new platforms do
not.
Wrap these in #ifdef LINUX_LEGACY_SYSCALLS, #defined in the MD linux.h
files. We may need finer grained control in the future but this is
sufficient for now.
Reviewed by: andrew
Sponsored by: Turing Robotic Industries
Differential Revision: https://reviews.freebsd.org/D15237
The Linuxulator provides per-syscall debug control via the
compat.linux.debug sysctl. There's generally a 1:1 mapping between
sysctl setting and syscall, but faccessat was controlled by the access
setting, perhaps due to copy-paste.
Sponsored by: Turing Robotic Industries
The break() system call was renamed (several times) starting in v3
AT&T UNIX when C was invented and break was a language keyword. The
last vestage of a need for it to be called something else (eg obreak)
was removed in r225617 which consistantly prefixed all syscall
implementations.
Reviewed by: emaste, kib (older version)
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D15638
the old encodings for the lower 16 and 32 bits and only using the
higher 32 bits for unusually large major and minor numbers. This
change breaks compatibility with the previous encoding (which was only
used in -current).
Fix truncation to (essentially) 16-bit dev_t in newnfs v3.
Any encoding of device numbers gives an ABI, so it can't be changed
without translations for compatibility. Extra bits give the much
larger complication that the translations need to compress into fewer
bits. Fortunately, more than 32 bits are rarely needed, so
compression is rarely needed except for 16-bit linux dev_t where it
was always needed but never done.
The previous encoding moved the major number into the top 32 bits.
Almost no translation code handled this, so the major number was blindly
truncated away in most 32-bit encodings. E.g., for ffs, mknod(8) with
major = 1 and minor = 2 gave dev_t = 0x10000002; ffs cannot represent
this and blindly truncated it to 2. But if this mknod was run on any
released version of FreeBSD, it gives dev_t = 0x102. ffs can represent
this, but in the previous encoding it was not decoded, giving major = 0,
minor = 0x102.
The presence of bugs was most obvious for exporting dev_t's from an
old system to -current, since bugs in newnfs augment them. I fixed
oldnfs to support 32-bit dev_t in 1996 (r16634), but this regressed
to 16-bit dev_t in newnfs, first to the old 16-bit encoding and then
further in -current. E.g., old ad0 with major = 234, minor = 0x10002
had the correct (major, minor) number on the wire, but newnfs truncated
this to (234, 2) and then the previous encoding shifted the major
number into oblivion as seen by ffs or old applications.
I first tried to fix this by translating on every ABI/API boundary, but
there are too many boundaries and too many sloppy translations by blind
truncation. So use the old encoding for the low 32 bits so that sloppy
translations work no worse than before provided the high 32 bits are
not set. Add some error checking for when bits are lost. Keep not
doing any error checking for translations for almost everything in
compat/linux.
compat/freebsd32/freebsd32_misc.c:
Optionally check for losing bits after possibly-truncating assignments as
before.
compat/linux/linux_stats.c:
Depend on the representation being compatible with Linux's (or just with
itself for local use) and spell some of the translations as assignments in
a macro that hides the details.
fs/nfsclient/nfs_clcomsubs.c:
Essentially the same fix as in 1996, except there is now no possible
truncation in makedev() itself. Also fix nearby style bugs.
kern/vfs_syscalls.c:
As for freebsd32. Also update the sysctl description to include file
numbers, and change it to describe device ids as device numbers.
sys/types.h:
Use inline functions (wrapped by macros) since the expressions are now
a bit too complicated for plain macros. Describe the encoding and
some of the reasons for it. 16-bit compatibility didn't leave many
reasonable choices for the 32-bit encoding, and 32-bit compatibility
doesn't leave many reasonable choices for the 64-bit encoding. My
choice is to put the 8 new minor bits in the low 8 bits of the top 32
bits. This minimizes discontiguities.
Reviewed by: kib (except for rewrite of the comment in linux_stats.c)
of 64-bit dev_t's (but not ones involving dev_t's).
st_size was supposed to be clamped in cvtstat() and linux's copy_stat(),
but the clamping code wasn't aware that st_size is signed, and also had
an obfuscated off-by-1 value for the unsigned limit, so its effect was
to produce a bizarre negative size instead of clamping.
Change freebsd32's copy_ostat() to be no worse than cvtstat(). It was
missing clamping and bzero()ing of padding.
Reviewed by: kib (except a final fix of the clamp to the signed maximum)
While at it rename hlist_add_after() into hlist_add_behind().
Submitted by: Johannes Lundberg <johalun0@gmail.com>
MFC after: 1 week
Sponsored by: Mellanox Technologies
Sponsored by: Limelight Networks
the LinuxKPI. Add a comment saying in which Linux version this change was made.
Submitted by: Johannes Lundberg <johalun0@gmail.com>
MFC after: 1 week
Sponsored by: Mellanox Technologies
Sponsored by: Limelight Networks
in the LinuxKPI. While at it document when to use the "virtual_address" or
the "address" field in the "vm_fault" structure.
Submitted by: Johannes Lundberg <johalun0@gmail.com>
MFC after: 1 week
Sponsored by: Mellanox Technologies
Sponsored by: Limelight Networks
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
sg_alloc_table_from_pages() function in the LinuxKPI.
This basically allow segments to have a limit, max_segment.
Submitted by: Johannes Lundberg <johalun0@gmail.com>
MFC after: 1 week
Sponsored by: Mellanox Technologies
Sponsored by: Limelight Networks
with upstream Linux by returning the pointer to the removed element.
Submitted by: Johannes Lundberg <johalun0@gmail.com>
MFC after: 1 week
Sponsored by: Mellanox Technologies
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
This is required by programs like sockstat that read variably sized
sysctls such as kern.file. The normal path has no such restriction and
the restriction was added without comment along with initial support for
freebsd32 in 2002 (r100384).
Reviewed by: kib
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D15438
- Add macros to allow preinitialization of cap_rights_t.
- Convert most commonly used code paths to use preinitialized cap_rights_t.
A 3.6% speedup in fstat was measured with this change.
Reported by: mjg
Reviewed by: oshogbo
Approved by: sbruno
MFC after: 1 month
by doing most of the work in a new function prison_add_vfs in kern_jail.c
Now a jail-enabled filesystem need only mark itself with VFCF_JAIL, and
the rest is taken care of. This includes adding a jail parameter like
allow.mount.foofs, and a sysctl like security.jail.mount_foofs_allowed.
Both of these used to be a static list of known filesystems, with
predefined permission bits.
Reviewed by: kib
Differential Revision: D14681
Use proper method to access userspace. For now, only the slow copyout
path is implemented.
Reported and tested by: tijl (previous version)
Sponsored by: The FreeBSD Foundation
-> PROC_PDEATHSIG_STATUS for consistency with other procctl(2)
operations names.
Requested by: emaste
Sponsored by: The FreeBSD Foundation
MFC after: 13 days
Remove auxarg_size as it was only used once right after a confusing
assignment in each of the variants of exec_copyout_strings().
Reviewed by: emaste
MFC after: 1 month
Differential Revision: https://reviews.freebsd.org/D15123
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
Previously linuxulator had three identical copies of
linux_exec_imgact_try. Deduplicate before adding another arch to
linuxulator.
Sponsored by: Turing Robotic Industries Inc
Differential Revision: https://reviews.freebsd.org/D14856
opt_compat.h is mentioned in nearly 180 files. In-progress network
driver compabibility improvements may add over 100 more so this is
closer to "just about everywhere" than "only some files" per the
guidance in sys/conf/options.
Keep COMPAT_LINUX32 in opt_compat.h as it is confined to a subset of
sys/compat/linux/*.c. A fake _COMPAT_LINUX option ensure opt_compat.h
is created on all architectures.
Move COMPAT_LINUXKPI to opt_dontuse.h as it is only used to control the
set of compiled files.
Reviewed by: kib, cem, jhb, jtl
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D14941
strlcpy is used to copy a string into a buffer to be copied to userland,
previously leaving uninitialized data after the terminating NUL. Zero
the buffer first to avoid a kernel memory disclosure.
admbugs: 765, 811
MFC after: 1 day
Reported by: Ilja Van Sprundel <ivansprundel@ioactive.com>
Reported by: Vlad Tsyrklevich
Sponsored by: The FreeBSD Foundation
- Make sure Giant is locked when calling PCI device methods.
Newbus currently requires this.
- Avoid unlocking Giant right before aquiring the sleepqueue lock.
This can save a task switch.
MFC after: 1 week
Sponsored by: Mellanox Technologies
It is random collection of fixes for issues not yet corrected,
reported at https://tsyrklevi.ch/clang_analyzer/freebsd_013017/. Many
issues from that list were already corrected. Most of them are for
compat32, old compat32 or affect both primary host ABI and compat32.
The freebsd32_kldstat(), for instance, was already fixed by using
malloc(M_ZERO). Patch includes correction to report the supplied
version back, which is just pedantic.
Reviewed by: brooks, emaste (previous version)
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D14868
This is more correct in that ioctl commands have no meaning until they
hit the handler associated with the file descriptor.
Add support for MDIOCRESIZE_32 which was missed when it was added.
Reviewed by: cem, kib, markj (various versions)
Obtained from: CheriBSD
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D14714
Include _uio.h instead of uio.h in several headers to reduce header
polution.
Fix a few places that relied on header polution to get the uio.h header.
I have not moved struct uio as many more things that use it rely on
header polution to get other definitions from uio.h.
Reviewed by: cem, kib, markj
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D14811
Many licenses on Linuxolator files contained small variations from the
standard FreeBSD license text. To avoid license proliferation switch to
the standard 2-Clause FreeBSD license for those files where I have
permission from each of the listed copyright holders.
Approved by: rdivacky, marcel
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
When disabling the MSIX IRQ vectors for a PCI device through the
LinuxKPI, make sure any old MSIX IRQ numbers are no longer visible to
the linux_pci_find_irq_dev() function else IRQs can be requested from
the wrong PCI device.
MFC after: 1 week
Sponsored by: Mellanox Technologies
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
Three copies of the linuxulator linux_sysvec.c contained identical
BSD to Linux errno translation tables, and future work to support other
architectures will also use the same table. Move the table to a common
file to be used by all. Make it 'const int' to place it in .rodata.
(Some existing Linux architectures use MD errno values, but x86 and Arm
share the generic set.)
This change should introduce no functional change; a followup will add
missing errno values.
MFC after: 3 weeks
Sponsored by: Turing Robotic Industries Inc.
Differential Revision: https://reviews.freebsd.org/D14665
When complete_all() is called there might be multiple waiters. The
current implementation could only handle one waiter. Make sure the
completion is sticky when complete_all() is called to be compatible
with Linux.
Found by: Johannes Lundberg <johalun0@gmail.com>
MFC after: 1 week
Sponsored by: Mellanox Technologies
Sponsored by: Limelight Networks
instead of pause() in the msleep() function to avoid rounding errors when
converting delay values forth and back. Add a guard for a delay value
of zero milliseconds which is undefined.
MFC after: 1 week
Requested by: Johannes Lundberg <johalun0@gmail.com>
Sponsored by: Mellanox Technologies
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
delayed_work in the LinuxKPI. This allows the timer_pending() function
macro to be used with delayed work structures.
No functional nor structural change.
MFC after: 1 week
Submitted by: Johannes Lundberg <johalun0@gmail.com>
Sponsored by: Mellanox Technologies
Sponsored by: Limelight Networks
Many licenses on Linuxolator files contained small variations from the
standard FreeBSD license text. To avoid license proliferation switch to
the standard 2-clause FreeBSD license for those files where I have
permission from each of the listed copyright holders. Additional files
still waiting on permission from others are listed in review D14210.
Approved by: dchagin, rdivacky, sos
MFC after: 1 week
MFC with: r329370
Sponsored by: The FreeBSD Foundation
LinuxKPI to comply more with Linux. This fixes an issue when these functions
are used in waiting loops.
MFC after: 1 week
Sponsored by: Mellanox Technologies
signal in the LinuxKPI.
The read(), write() and mmap() system calls can return either EINTR or
ERESTART upon receiving a signal. Add code to figure out the correct
return value by temporarily storing the return code from the relevant
FreeBSD kernel APIs in the Linux task structure.
MFC after: 3 days
Sponsored by: Mellanox Technologies
binary mode user-space emulation layer. This is a regression issue after
r328436, when LinuxKPI character devices started to use DTYPE_DEV in
the "f_type" field of the associated file structure(s).
MFC after: 3 days
Found by: Johannes Lundberg <johalun0@gmail.com>
Sponsored by: Mellanox Technologies
Remove the unused syscall_(de)register() functions in favor of the
better documented and easier to use syscall_helper_(un)register(9)
functions.
The default and freebsd32 versions differed in which array of struct
sysents they used and a few missing updates to the 32-bit code as
features were added to the main code.
Reviewed by: cem
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D14337
Make vm_wait() take the vm_object argument which specifies the domain
set to wait for the min condition pass. If there is no object
associated with the wait, use curthread' policy domainset. The
mechanics of the wait in vm_wait() and vm_wait_domain() is supplied by
the new helper vm_wait_doms(), which directly takes the bitmask of the
domains to wait for passing min condition.
Eliminate pagedaemon_wait(). vm_domain_clear() handles the same
operations.
Eliminate VM_WAIT and VM_WAITPFAULT macros, the direct functions calls
are enough.
Eliminate several control state variables from vm_domain, unneeded
after the vm_wait() conversion.
Scetched and reviewed by: jeff
Tested by: pho
Sponsored by: The FreeBSD Foundation, Mellanox Technologies
Differential revision: https://reviews.freebsd.org/D14384
Make sure all RCU dereferencing use the READ_ONCE() function macro.
MFC after: 1 week
Submitted by: Johannes Lundberg <johalun0@gmail.com>
Sponsored by: Mellanox Technologies
Sponsored by: Limelight Networks
