The branch from _start to mpentry has to cross a large section of data;
an offset larger than can be specified with a 12-bit branch immediate.
Fix this by converting the branch to an unconditional jump. The gcc
assembler does this conversion silently but it is not done automatically
by clang.
Reported by: Jeremy Bennett <jeremy.bennett@embecosm.com>
Reviewed by: markj
Approved by: markj (mentor)
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D21437
Use the -march and -mabi flags for both gcc and clang as they are
compatible. Specify the "medium" code model separately as it goes by the
name "medany" under gcc, although they are equivalent.
Reviewed by: markj
Approved by: markj (mentor)
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D21436
Both clang and gcc development branches have reached version 10. Since we
only parse for a single digit in the major version number, this causes
COMPILER_VERSION to be set to its default of 0.0.0, meaning version checks
fail with these newer compilers.
Reviewed by: emaste
Approved by: markj (mentor)
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D21413
--gc-sections is not really useful unless we generate sections with
-ffunction-sections -fdata-sections
While there, i386/loader would win from --gc-sections too.
Instead of using hardcoded bpp of 24, obtain current/configured value
from VideoCore. This solves certain problems with Xorg/Qt apps that
require bpp of 32 to work properly. The mode can be forced by setting
framebuffer_depth value in config.txt
PR: 235363
Submitted by: Steve Peurifoy <ssw01@mathistry.net>
The fusefs tests deliberately leak file descriptors. To do otherwise would
add extra complications to the tests' mock FUSE server. This annotation
should hopefully convince Coverity to shut up about the leaks.
Reviewed by: uqs
MFC after: 4 days
Sponsored by: The FreeBSD Foundation
Error there mean that command was not even executed, and all information
we have about it is errno, and cam_error_print() call is not very useful.
Plus it is most likely a programmatic error, that shoud not happen.
MFC after: 1 week
Sponsored by: iXsystems, Inc.
Otherwise, we might left the boolean set, which would affect cleanup
after an error on interpreter activation.
Reviewed by: markj
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D21560
We track text mappings explicitly, there is no removal of the text
refs on the object deallocate any more, so tmpfs objects should not be
treated specially. Doing so causes excess deref.
Reported and tested by: gallatin
Reviewed by: markj
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D21560
This is a rework of r344701, that noticed that number of bytes passes to
8 bit sector count field gets truncated. First decision was to not pass
anything, since ATA specs define the field as N/A. But it appeared to be a
problem for some SAT devices, that require information about data transfer
to operate properly. Some additional investigation shown that it is quite
a common practice to set unused fields of ATA commands (fortunately ATA
specs formally allow it) to supply the information to SAT layer. I have
found SAS-SATA interposer that does not allow pass-through without it.
As side effect, reduce code duplication by removing ata_do_28bit_cmd()
function, replacing it with more universal ata_do_cmd().
MFC after: 1 week
Sponsored by: iXsystems, Inc.
this to 2k to prevent them from being truncated and ignored. It
appears to be a sanity check only, but bumping it to 2k allows both of
my iic hid devices to be parsed and the second one to work...
Address the following defects reported by Coverity:
* Structurally dead code (CID 1404366): set m_quit before FAIL, not after
* Unchecked return value of sysctlbyname (CID 1404321)
* Unchecked return value of stat(2) (CID 1404471)
* Unchecked return value of open(2) (CID 1404402, 1404529)
* Unchecked return value of dup(2) (CID 1404478)
* Buffer overflows. These are all false positives caused by the fact that
Coverity thinks I'm using a buffer to store strings, when in fact I'm
really just using it to store a byte array that happens to be initialized
with a string. I'm changing the type from char to uint8_t in the hopes
that it will placate Coverity. (CID 1404338, 1404350, 1404367, 1404376,
1404379, 1404381, 1404388, 1404403, 1404425, 1404433, 1404434, 1404474,
1404480, 1404484, 1404503, 1404505)
* False positive file descriptor leak. I'm going to try to fix this with
Coverity modeling, but I'll also change an EXPECT to ASSERT so we don't
perform meaningless assertions after the failure. (CID 1404320, 1404324,
1404440, 1404445).
* Unannotated file descriptor leak. This will be followed up by a Coverity
modeling change. (CID 1404326, 1404334, 1404336, 1404357, 1404361,
1404372, 1404391, 1404395, 1404409, 1404430, 1404448, 1404451, 1404455,
1404457, 1404458, 1404460)
* Uninitialized variables in C++ constructors (CID 1404327, 1404346). In the
case of m_maxphys, this actually led to part of the FUSE_INIT's response
being set to stack garbage during the WriteCluster::clustering test.
* Uninitialized sun_len field in struct sockaddr_un (CID 1404330, 1404371,
1404429).
Reported by: Coverity
Reviewed by: emaste
MFC after: 3 days
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D21457
CID 1404532 fixes a signed vs unsigned comparison error in fuse_vnop_bmap.
It could potentially have resulted in VOP_BMAP reporting too many
consecutive blocks.
CID 1404364 is much worse. It was an array access by an untrusted,
user-provided variable. It could potentially have resulted in a malicious
file system crashing the kernel or worse.
Reported by: Coverity
Reviewed by: emaste
MFC after: 3 days
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D21466
We cannot use file (without :T) to name targets
but we can use the destination directory (with / replaced by _)
This has the benefit of minimizing the targets created.
Reviewed by: bdrewery
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org//D21283
The EXAMPLES section does not contain any examples of output formats for
the old-style scripts. Remove the misleading bits stating otherwise.
Reviewed by: bcr, imp
Approved by: src (imp)
Differential Revision: https://reviews.freebsd.org/D21552
[IfConversion] Fix diamond conversion with unanalyzable branches.
The code was incorrectly counting the number of identical
instructions, and therefore tried to predicate an instruction which
should not have been predicated. This could have various effects: a
compiler crash, an assembler failure, a miscompile, or just
generating an extra, unnecessary instruction.
Instead of depending on TargetInstrInfo::removeBranch, which only
works on analyzable branches, just remove all branch instructions.
Fixes https://bugs.llvm.org/show_bug.cgi?id=43121 and
https://bugs.llvm.org/show_bug.cgi?id=41121 .
Differential Revision: https://reviews.llvm.org/D67203
This should fix "Unable to predicate BX killed renamable $r0" errors
when building the lang/spidermonkey170 and lang/spidermonkey38 ports for
armv7 and armv6.
PR: 236567
MFC after: 3 days
to add BBR. These changes make it so you can get an
array of timestamps instead of a compressed ack/data segment.
BBR uses this to aid with its delivery estimates. We also
now (via Drew's suggestions) will not go to the expense of
the tcb lookup if no stack registers to want this feature. If
HPTS is not present the feature is not present either and you
just get the compressed behavior.
Sponsored by: Netflix Inc
Differential Revision: https://reviews.freebsd.org/D21127
We only call alloc_pvo_entry() with M_WAITOK from one location. However,
this can be called while holding nonsleepable locks. Rather than passing
M_WAITOK down, use vm_wait() and loop.
Summary:
MOEA64_PTE_REPLACE() is called often with the pmap lock held, and
sometimes with the page pv lock held. The less work done while holding
a lock, the better. Since we are intending to replace the same PTE
(same hash index), we don't need to recalculate anything, just flat
replace the PTE. This cuts more than 200 instructions off the
invalidating code path. In addition, we don't need to replace a PTE
that's not occupied by this PVO.
Reviewed by: luporl
Differential Revision: https://reviews.freebsd.org/D21515
Summary:
There is logic in ELF loadimage() to relocate kernels, but currently
only type ET_EXEC. PowerPC kernels are ET_DYN, and can be relocated anywhere.
Add the load offset to kernel entry points on this platform.
Reviewed by: imp, ian
Differential Revision: https://reviews.freebsd.org/D21286
The "nd" argument for nfsrv_proxyds() is no longer used by the function.
This patch deletes it. This allows a subsequent patch to delete the "nd"
argument from nfsvno_getattr(), since it's only use of "nd" was to pass it
to nfsrv_proxyds().
Getting rid of the "nd" argument from nfsvno_getattr() avoids confusion
over why it might need "nd".
This patch is trivial and does not have any semantic effect.
Replace mini cons25 emulator with teken, this does enable us proper console
terminal for loader and will make it possible to implement different
back end callbacks to draw to screen.
At this time we still only "draw" in text mode.
These were fully neutered in r177676 (2008), but not removed at the time for
unclear reasons. They're totally dead code, so go ahead and yank them now.
No functional change.
After r294954, it is an invariant that bread returns non-NULL bp if and only
if the routine succeeded. On error, it handles any buffer cleanup
internally. So the brelse(NULL) here was just redundant.
No functional change.
Discussed with: kib (extracted from a larger differential)
heap buffer overflow. This was discovered by a Google fuzzer test.
This can lead to remote denial of service. User interaction and
execution privileges are not a prerequisite for exploitation.
Reported by: enh at Google, to FreeBSD by maya@NetBSD.org
Obtained from: enh at Google
See also: NetBSD ns_name.c r1.12
Reviewed by: delphij, ume
MFC after: 3 days
https://android-review.googlesource.com/c/platform/bionic/+/1093130
Differential Revision: https://reviews.freebsd.org/D21523
