Revert commit e655e74a318e from llvm git (by Peter Collingbourne):
AST: Create __va_list in the std namespace even in C.
This ensures that the mangled type names match between C and C++,
which is significant when using -fsanitize=cfi-icall. Ideally we
wouldn't have created this namespace at all, but it's now part of
the ABI (e.g. in mangled names), so we can't change it.
Differential Revision: https://reviews.llvm.org/D104830
As reported by Jessica in https://reviews.llvm.org/D104830#3129527, this
upstream change is implemented in such a way that it breaks DTrace's
CTF. Since a proper fix has not yet been forthcoming, and we are
unaffected by the (CFI-related) problem upstream was trying to address,
revert the change for now.
Requested by: jrtc27
MFC after: 3 days
OVMF creates two separate .fd files, a _CODE.fd file containing
the UEFI code, and a _VARS.fd file containing a template of an
empty UEFI variable store.
OVMF decides to write variables to the memory range just below the
boot rom code if it detects a CFI flash device. So here we add
just the barest facsimile of CFI command handling to bootrom.c
that is needed to placate OVMF.
Submitted by: D Scott Phillips <d.scott.phillips@intel.com>
Sponsored by: Intel Corporation
Differential Revision: https://reviews.freebsd.org/D19976
MFC After: 1 week
and stop recalculating alignment for PIE base, which was off by one
power of two.
Suggested and reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D33359
Only accept at most superpage alignment, or if the arch does not have
superpages supported, artificially limit it to PAGE_SIZE * 1024.
This is somewhat arbitrary, and e.g. could change what binaries do
we accept between native i386 vs. amd64 ia32 with superpages disabled,
but I do not believe the difference there is affecting anybody with
real (useful) binaries.
Reported and tested by: pho
Reviewed by: markj
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D33359
Invalid (artificial) layout of the loadable ELF segments might result in
triggering the assertion. This means that the file should not be
executed, regardless of the kernel debug mode. Change calling
conventions for rnd_elf{32,64} helpers to allow returning an error, and
abort activation with ENOEXEC if its invariants are broken.
Reported and tested by: pho
Reviewed by: markj
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D33359
Without this patch, the KASSERT(must_commit == 0,..) can be
triggered by the writeverf in the Direct I/O write reply changing.
This is not a situation that should cause a panic(). Correct
handling is to ignore the change in "writeverf" for Direct
I/O, since it is done with NFSWRITE_FILESYNC.
This patch modifies the semantics of the "must_commit"
argument slightly, allowing an initial value of 2 to indicate
that a change in "writeverf" should be ignored.
It also fixes the KASSERT()s.
This bug would affect few, since Direct I/O is not enabled
by default and "writeverf" rarely changes. Normally "writeverf"
only changes when a NFS server reboots, however I found the
bug when testing against a Linux 5.15.1 kernel nfsd, which
replied to a NFSWRITE_FILESYNC write with a "writeverf" of all
0x0 bytes.
MFC after: 2 weeks
Reading from Write Combining memory can be very-very slow. Try to use
shadow buffer to avoid such reads.
MFC after: 1 month
Differential Revision: https://reviews.freebsd.org/D33305
Introduce new MSGBUF_WRAP flag, indicating that buffer has wrapped
at least once and does not keep zeroes from the last msgbuf_clear().
It allows msgbuf_peekbytes() to return only real data, not requiring
every consumer to trim the leading zeroes after doing pointless copy.
The most visible effect is that kern.msgbuf sysctl now always returns
proper zero-terminated string, not only after the first buffer wrap.
MFC after: 1 week
Sponsored by: iXsystems, Inc.
MNTK_NOKNOTE was introduced in 679985d03a64f5dfb4355538ae6e3b70f8347f38
(dated 2005), VV_NOKNOTE in 34cc826ae8999f454dd6cb9c77d17ce83b169f92 few
months later.
Neither was ever used by anything in the tree.
Now that MIPS isn't a recognized target for buildworld, move llvm mips
to off by default.
Sponsored by: Netflix
Reviewed by: dim
Differential Revision: https://reviews.freebsd.org/D33364
As part of decommissioning mips support, remove the boot loader
support. Do this in advance of other boot loader work to limit the
amount of work that will be thrown away.
Sponsored by: Netflix
Reviewed by: jrtc27
Differential Revision: https://reviews.freebsd.org/D33377
The elf loader needs to know how to reach into the gfx_fb code, so
simplify how we include files to find that stuff.
Sponsored by: Netflix
Reviewed by: manu, tsoome
Differential Revision: https://reviews.freebsd.org/D33376
In pmap_ts_referenced we read the virtual address from pv->pv_va,
but then continue to use the pv struct to get the same value later
in the function.
Use the virtual address value we initially read rather than loading
from the pv struct each time.
