The bogus use could lead to an infinite loop depending on how fast the
audit_warn script to execute.
By fixing read(2) interruptibility, d060887 (r335899) revealed another bug
in auditd_wait_for_events. When read is interrupted by SIGCHLD,
auditd_reap_children will always return with errno set to ECHILD. But
auditd_wait_for_events checks errno after that point, expecting it to be
unchanged since read. As a result, it calls auditd_handle_trigger with bogus
stack garbage. The result is the error message "Got unknown trigger 48." Fix
by simply ignoring errno at that point; there's only one value it could've
possibly had, thanks to the check up above.
The best part is we've had a fix for this for like 18 months and just never
merged it. Merge it now.
PR: 234209
Reported by: Marie Helene Kvello-Aune <freebsd AT mhka.no> (2018-12)
Submitted by: asomers (2018-07)
Reviewed by: me (in OpenBSM)
Obtained from: OpenBSM
X-MFC-With: r335899
Security: ¯\_(ツ)_/¯
Differential Revision: https://github.com/openbsm/openbsm/pull/45
Clarify the deprecation notice in amd.8. amd will be removed from the
FreeBSD base system before FreeBSD 13.0.
Reviewed by: rgrimes, trasz, kevans, brooks (all earlier, in D22466)
Discussed with: cy
MFC after: 3 days
Sponsored by: The FreeBSD Foundation
[mips] Set macros for Octeon+ CPU
This is one of the upstream changes needed for adding support for the
OCTEON+ CPU type, so that we can test Clang builds using the most
commonly available FreeBSD/mips64 reference platform, the Edge Router
Lite.
Requested by: kevans
MFC after: 1 month
X-MFC-With: r353358
[mips] Set __OCTEON__ macros
This is one of the upstream changes needed for adding support for the
OCTEON+ CPU type, so that we can test Clang builds using the most
commonly available FreeBSD/mips64 reference platform, the Edge Router
Lite.
Requested by: kevans
MFC after: 1 month
X-MFC-With: r353358
[mips] Fix `__mips_isa_rev` macros value for Octeon CPU
This is one of the upstream changes needed for adding support for the
OCTEON+ CPU type, so that we can test Clang builds using the most
commonly available FreeBSD/mips64 reference platform, the Edge Router
Lite.
Requested by: kevans
MFC after: 1 month
X-MFC-With: r353358
[mips] Add `octeon+` to the list of CPUs accepted by the driver
This is one of the upstream changes needed for adding support for the
OCTEON+ CPU type, so that we can test Clang builds using the most
commonly available FreeBSD/mips64 reference platform, the Edge Router
Lite.
Requested by: kevans
MFC after: 1 month
X-MFC-With: r353358
[mips] Write `AFL_EXT_OCTEONP` flag to the `.MIPS.abiflags` section
Differential Revision: https://reviews.llvm.org/D69851
This is one of the upstream changes needed for adding support for the
OCTEON+ CPU type, so that we can test Clang builds using the most
commonly available FreeBSD/mips64 reference platform, the Edge Router
Lite.
Requested by: kevans
MFC after: 1 month
X-MFC-With: r353358
[mips] Support `octeon+` CPU in the `.set arch=` directive
Differential Revision: https://reviews.llvm.org/D69850
This is one of the upstream changes needed for adding support for the
OCTEON+ CPU type, so that we can test Clang builds using the most
commonly available FreeBSD/mips64 reference platform, the Edge Router
Lite.
Requested by: kevans
MFC after: 1 month
X-MFC-With: r353358
[mips] Implement Octeon+ `saa` and `saad` instructions
`saa` and `saad` are 32-bit and 64-bit store atomic add instructions.
memory[base] = memory[base] + rt
These instructions are available for "Octeon+" CPU. The patch adds
support for both instructions to MIPS assembler and diassembler and
introduces new CPU type - "octeon+".
Next patches will implement `.set arch=octeon+` directive and
`AFL_EXT_OCTEONP` ISA extension flag support.
Differential Revision: https://reviews.llvm.org/D69849
This is one of the upstream changes needed for adding support for the
OCTEON+ CPU type, so that we can test Clang builds using the most
commonly available FreeBSD/mips64 reference platform, the Edge Router
Lite.
Requested by: kevans
MFC after: 1 month
X-MFC-With: r353358
This reapplies the RISC-V GNU ld workaround from r354896, r354899, and
354900, along with a fix for the build failure during cleandir.
LINKER_TYPE was not being set during cleandir, resulting in
Malformed conditional (${LINKER_TYPE} == "bfd" && ${MACHINE} == "riscv")
from Cirrus-CI.
PR: 242109
Sponsored by: The FreeBSD Foundation
unifdef(1): Improve worst-case bound on symbol resolution
Use RB_TREE to make some algorithms O(lg N) and O(N lg N) instead of O(N)
and O(N^2).
While here, remove arbitrarily limit on number of macros understood.
Reverts r354877 and r354878, which disabled the (correct) test.
PR: 242095
Reported by: lwhsu
Summary: A follow-on to r276634, which added the VMX note to userland cores,
and r334538 for VSX notes.
Copied from note_type_linux_core().
Reviewed by: emaste
Differential Revision: https://reviews.freebsd.org/D22404
Summary:
The ?: operator has a lower precedence than == and &&, so the result will always
be recorded as true. Found by gcc8.
Reviewed by: ngie, ae
Differential Revision: https://reviews.freebsd.org/D22427
Co-mingling two things here:
* Addressing some feedback from Konstantin and Kyle re: jail,
capability mode, and a few other things
* Adding audit support as promised.
The audit support change includes a partial refresh of OpenBSM from
upstream, where the change to add shm_rename has already been
accepted. Matthew doesn't plan to work on refreshing anything else to
support audit for those new event types.
Submitted by: Matthew Bryan <matthew.bryan@isilon.com>
Reviewed by: kib
Relnotes: Yes
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D22083
Apply vendor fixes:
06de62c Detect multiplication overflow when computing sector position
46a8443 Limit the number of elements in a vector (found by oss-fuzz)
Requested by: wen
MFC after: 3 days
Security: CVE-2019-18218
[InstCombine] Disable some portions of foldGEPICmp for GEPs that
return a vector of pointers. Fix other portions.
llvm-svn: 370114
This should fix instances of 'Assertion failed: (isa<X>(Val) &&
"cast<Ty>() argument of incompatible type!"), function cast, file
/usr/src/contrib/llvm/include/llvm/Support/Casting.h, line 255', when
building openjdk8 for aarch64 and armv7.
Reported by: jbeich
PR: 236566
MFC after: 3 days
/proc/curproc/file and the KERN_PROC_PATHNAME sysctl may not return the
desired path if there are multiple hardlinks to the file.
PR: 241932
Tested by: ler
Sponsored by: The FreeBSD Foundation
[libc++] Harden usage of static_assert against C++03
In C++03, we emulate static_assert with a macro, and we must
parenthesize multiple arguments.
llvm-svn: 373328
This is a follow-up to r354460, which causes errors for pre-C++11
programs using <cmath>, similar to:
/usr/include/c++/v1/cmath:622:68: error: too many arguments provided to
function-like macro invocation
Reported by: antoine
MFC after: immediately (because of ports breakage)
Object files may specify insufficient alignment on certain sections, for
example due to a bug in NASM[1]. When we detect that case in elfcopy or
strip, emit a warning and increase the alignment to the minimum
required.
The NASM bug was fixed in 2015[2], but we might as well have this fixup
(and warning) in elfcopy in case we encounter such a file for any other
reason.
This might be reworked somewhat upstream - see ELF Tool Chain
ticket 485[3].
[1] https://bugzilla.nasm.us/show_bug.cgi?id=3392307
[2] 1f0cb0f2c1
[3] https://sourceforge.net/p/elftoolchain/tickets/485/
PR: 198611
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D2292
[RISCV] Add Custom Parser for Atomic Memory Operands
Summary:
GCC Accepts both (reg) and 0(reg) for atomic instruction memory
operands. These instructions do not allow for an offset in their
encoding, so in the latter case, the 0 is silently dropped.
Due to how we have structured the RISCVAsmParser, the easiest way to
add support for parsing this offset is to add a custom AsmOperand and
parser. This parser drops all the parens, and just keeps the
register.
This commit also adds a custom printer for these operands, which
matches the GCC canonical printer, printing both `(a0)` and `0(a0)`
as `(a0)`.
Reviewers: asb, lewis-revill
Reviewed By: asb
Subscribers: s.egerton, hiraditya, rbar, johnrusso, simoncook,
apazos, sabuasal, niosHD, kito-cheng, shiva0217, jrtc27, MaskRay,
zzheng, edward-jones, rogfer01, MartinMosbeck, brucehoult, the_o,
rkruppe, jfb, PkmX, jocewei, psnobl, benna, Jim, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D65205
llvm-svn: 367553
Merge commit f596f4507 from llvm git (by Sam Elliott):
[RISCV] Add FreeBSD targets
Reviewers: asb
Reviewed By: asb
Subscribers: simoncook, s.egerton, lenary, psnobl, benna, mhorne,
emaste, kito-cheng, shiva0217, rogfer01, rkruppe, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D57795
Patch by James Clarke (jrtc27)
llvm-svn: 367557
Merge commit f596f4507 from llvm git (by Hsiangkai Wang):
[DebugInfo] Generate fixups as emitting DWARF .debug_frame/.eh_frame.
It is necessary to generate fixups in .debug_frame or .eh_frame as
relaxation is enabled due to the address delta may be changed after
relaxation.
There is an opcode with 6-bits data in debug frame encoding. So, we
also need 6-bits fixup types.
Differential Revision: https://reviews.llvm.org/D58335
llvm-svn: 366524
Merge commit f596f4507 from llvm git (by Hsiangkai Wang):
[DebugInfo] Some fields do not need relocations even relax is enabled.
In debug frame information, some fields, e.g., Length in CIE/FDE and
Offset in FDE are attributes to describe the structure of CIE/FDE.
They are not related to the relaxed code. However, these attributes
are symbol differences. So, in current design, these attributes will
be filled as zero and LLVM generates relocations for them.
We only need to generate relocations for symbols in executable
sections. So, if the symbols are not located in executable sections,
we still evaluate their values under relaxation.
Differential Revision: https://reviews.llvm.org/D61584
llvm-svn: 366531
Merge commit f596f4507 from llvm git (by Alex Bradbury):
[RISCV] Don't force absolute FK_Data_X fixups to relocs
The current behavior of shouldForceRelocation forces relocations for
the majority of fixups when relaxation is enabled. This makes sense
for fixups which incorporate symbols but is unnecessary for simple
data fixups where the fixup target is already resolved to an absolute
value.
Differential Revision: https://reviews.llvm.org/D63404
Patch by Edward Jones.
llvm-svn: 369257
Merge commit f596f4507 from llvm git (by Alex Bradbury):
[RISCV] Implement getExprForFDESymbol to ensure RISCV_32_PCREL is
used for the FDE location
Follow binutils in using RISCV_32_PCREL for the FDE initial location.
As explained in the relevant binutils commit
<a6cbf936e3>,
the ADD/SUB pair of relocations is problematic in the presence of
linker relaxation.
This patch has the same end goal as D64715 but includes test changes
and avoids adding a new global VariantKind to MCExpr.h (preferring
RISCVMCExpr VKs like the rest of the RISC-V backend).
Differential Revision: https://reviews.llvm.org/D66419
llvm-svn: 369375
This series of merges will permit riscv64 kernels and riscv64sf worlds
to build with clang instead of gcc (but still using the bfd linker).
Requested by: jhb
Obtained from: https://github.com/freebsd/freebsd/compare/master...bsdjhb:riscv_clang
MFC after: 1 month
X-MFC-With: r353358
[libc++] Add `__truncating_cast` for safely casting float types to
integers
This is needed anytime we need to clamp an arbitrary floating point
value to an integer type.
Thanks to Eric Fiselier for the patch.
Differential Revision: https://reviews.llvm.org/D66836
llvm-svn: 370891
Merge commit b92deded8 from llvm git (by Louis Dionne):
[libc++] Move __clamp_to_integral to <cmath>, and harden against
min()/max() macros
llvm-svn: 370900
Merge commit 0ec6a4882 from llvm git (by Louis Dionne):
[libc++] Fix potential OOB in poisson_distribution
See details in the original Chromium bug report:
https://bugs.chromium.org/p/chromium/issues/detail?id=994957
Together, these fix a security issue in libc++'s implementation of
std::poisson_distribution, which can be exploited to read data which is
out of bounds.
Note there are no programs in the FreeBSD base system that use
std::poisson_distribution, so this is only a possible issue for ports
and external programs which have been built against libc++. Therefore,
I am bumping __FreeBSD_version for the benefit of our port maintainers.
Requested by: emaste
Security: potential OOB read
MFC after: 3 days
[x86] avoid crashing when splitting AVX stores with non-simple type
(PR43916)
The store splitting transform was assuming a simple type (MVT), but
that's not necessarily the case as shown in the test.
This should fix 'Assertion failed: (isSimple() && "Expected a
SimpleValueType!")' when building the security/openssl111 port targeting
a CPU that supports AVX, but not AVX2, such as sandybridge.
PR: 241747
MFC after: 1 month
X-MFC-With: r353358
- move from "oxtradoc" to RST/Sphinx documentation
- new "csv" encoder, which allows path and leaf lists
- address warnings from PVS-Stdio tool
- add "xolint" detected errors to the documentation
There doesn't seem to be much sense in defaulting "on" unwind tables on
amd64 and not on other arches. It causes surprising differences between
platforms, such as the PR below.
Prior to this change, FreeBSD inherited the default implementation of the
method from the Gnu.h Generic_Elf => Generic_GCC parent class, which
returned true only for amd64 targets. Override that and opt on always,
similar to, e.g., NetBSD.
PR: 241562
Reported by: lwhsu
Reviewed by: dim
Discussed with: emaste
MFC after: I'm not going to, but you should feel free
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D22252
GCC's libgcc exports a few ARM-specific symbols for ARM EABI, AEABI, or
EHABI or whatever it's called. Export the same ones from LLVM-libunwind's
libgcc_s, on ARM. As part of this, convert libgcc_s from a direct
Version.map to one constructed from component Symbol.map files. This allows
the ARM-specific Symbol.map to be included only on ARM.
Fix ARM-only oddities in struct name/aliases in LLVM-libunwind to match
non-ARM definitions and ARM-specific expectations in libcxxrt /
libcompiler_rt.
No functional change intended for non-ARM architectures.
This commit does not actually flip the switch for ARM defaults from libgcc
to llvm-libunwind, but makes it possible (to compile, anyway).
[PowerPC] Do not emit HW loop if the body contains calls to
lrint/lround
These two intrinsics are lowered to calls so should prevent the
formation of CTR loops. In a subsequent patch, we will handle all
currently known intrinsics and prevent the formation of HW loops if
any unknown intrinsics are encountered.
Differential revision: https://reviews.llvm.org/D68841
This should fix an "invalid CRT loop" assertion when building the
www/node port for powerpc64.
Requested by: Alfredo Dal'Ava Júnior <alfredo.junior@eldorado.org.br>
MFC after: 1 month
X-MFC-With: r353358
Current implementation of ppcfbsd_pc_in_sigtramp() seems to take only 32-bit
PowerPC in account, as on 64-bit PowerPC most kernel instruction addresses will
be wrongly reported as in sigtramp.
This change adds proper sigtramp detection for PPC64.
Reviewed by: jhibbits
Differential Revision: https://reviews.freebsd.org/D22199
It turns out that a test of backtrace symbol resolution and formatting
requires symbols. Another option mightt be building with -rdynamic instead,
but this works for now.
Re-enabled skipped CI test, as it should now pass.
PR: 241562
Submitted by: lwhsu
Reported by: lwhsu
X-MFC-With: r354126, r354135, r354144
Revert rL349624 : Let TableGen write output only if it changed,
instead of doing so in cmake, attempt 2
Differential Revision: https://reviews.llvm.org/D55842
-----------------
As discussed on PR43385 this is causing Visual Studio msbuilds to
perpetually rebuild all tablegen generated files
Pull in r373664 from upstream llvm trunk (by Nico Weber):
Reland r349624: Let TableGen write output only if it changed, instead
of doing so in cmake
Move the write-if-changed logic behind a flag and don't pass it with
the MSVC generator. msbuild doesn't have a restat optimization, so
not doing write-if-change there doesn't have a cost, and it should
fix whatever causes PR43385.
This should fix the scenario where an incremental build from before
r353358 (the clang 9.0.0 upgrade) to r353358 or later fails to update
the timestamp of the generated lib/clang/headers/arm_fp16.h header.
After such a build, installing world from read-only source and object
directories would attempt to generate the header again, leading to
"clang-tblgen: error opening arm_fp16.h.d:Read-only file system".
Reported by: avg, np
PR: 241402
MFC after: 1 month
X-MFC-With: r353358
The bogus requirement was causing CI infrastructure (which does not mount
procfs) to skip the test. Procfs has not been needed by libexecinfo on
FreeBSD (nor NetBSD) for years. Both now use a sysctl to obtain the path to
the current process image.
X-MFC-With: r354126
