EXT_FRACBITS, the number of bits in the _binary encoding_ that stores
the trailing significand field, is never 113. In IEEE 754 binary128,
it is 112, even though there are 113 bits of precision in the set of
floating-point numbers -- the leading 1 bit is implicit in binary128.
So ld128 platforms like aarch64 and sparc64 were skipping the real
definition and just defining rintl as an alias for rint, which is
wrong.
In contrast, LDBL_MANT_DIG, the number of bits of precision in the set
of floating-point numbers (p, in IEEE 754 parlance), is 113 in IEEE 754
binary128. This is also the constant used in FreeBSD libm anyway. So
let's just use that instead of trying to translate it to our private
EXT_FRACBITS (not defined in FreeBSD) with a fencepos terror. And
delete the buggy rintl=rint alias.
PR lib/58054
Revert the part of rev 1.32 (reapplying "Do away with separate pool_cache
for some kernel objects") that changed the memory allocation for radixtree
nodes from PR_NOWAIT to KM_SLEEP as part of changing from a pool to kmem.
uvm_pageinsert_tree() calls into the radixtree code while holding
the object's vmobjlock, but that same lock is taken by the pagedaemon
in the process of reclaiming pages, and if the pagedaemon happens to
choose the same object to reclaim from that uvm_pageinsert_tree()
is being called on, then these two threads will deadlock.
The previous code already handled memory allocation failures
in uvm_pageinsert_tree() so we can simply change it back to nosleep.
Fixes a hang reported by simonb@, and the fix was also tested by him.
All changes to the global variable 'dcs' are tracked now, to help
identify the cause of the failing tests in expr_sizeof and
gcc_attribute_aligned.
While here, test more invalid type combinations in typedefs.
* XXX Want a better equality test. `tcnp->cn_cred == cred'
* hoses p2k because puffs transmits the creds separately and
* allocates distinct but equivalent structures for them.
Fixes rename crash in rump_msdos.
To boot NetBSD on the 122-16, copy the .dtb built from
zynq-red-pitays-122-16.dts, the first-stage bootloader (called
boot.bin) and U-Boot that came with the 122-16 and a kernel image,
netbsd.ub, built for earmv7hf to an MS-DOS partition on an
MBR-partitioned SD card. At the U-Boot prompt, "Zynq> ", type these
commands:
i2c dev 0
eeprom read 0 0x50 0 0x1804 0x400
env import -b 0 0x400 hw_rev serial ethaddr
setenv bootargs "root=ld0a"
fatload mmc 0 0x01f00000 device~1.dtb
fatload mmc 0 0x02000000 netbsd.ub
fdt addr 0x01f00000
fdt set /axi/ethernet@e000b000 local-mac-address $ethaddr
bootm 0x02000000 - 0x01f00000
Note that the ethernet PHY will not attach unless you have applied
the patches from Lloyd Parkes in kern/58083.
UART drivers do. If cn_dev is 0 instead of NODEV, then the kernel
may redirect console writes to major 0, minor 0, which is /dev/mem.
On my Zynq board the kernel overwrote the page free list with a
console message in this way.
Be consistent with configs for pretty much every other (modern) arch
and provide dhcpcd, lest someone end up using this image and then be
surprised (as happened relatively recently with evbmips images). This
means of course we also need bpf.
While here, add a few wedge devices, too. This aligns us with the
device definitions evbmips uses (that appears to be where the riscv
Makefile was copied from back in 2015).
Even though the test only uses fixed-size types, lint's computed size of
the resulting struct differs between i386 (80) and x86_64 (112). Both
are wrong, probably due to the unrelated struct declaration above, as
already mentioned in the comments.
While measuring the alignment in bits makes sense when building a struct
type with bit-fields, in all other places it is more confusing than
helpful.
The only visible change is that in debug mode, the format of type sizes
and alignment changed. Since the size of all complete types is a
multiple of a byte (as defined in the C standard), sizes and alignments
are reported in bytes as well. Only while a struct is being built, the
type size may include an additional '+x' for the bits of a bit-field.
riastradh