XN (eXecute Never) appropriately.
The XN logic is inconsistent and could do with changing to XN always set
and cleared for VM_PROT_EXECUTE (or the inverse) everywhere.
pointers. Ensure that we have the correct "old" values before setting
new values, for both "intall" and "deinstall".
XXX This is NOT intended to encourage additional cases of hijacking! If
XXX some other hijack feature ever gets committed, this code should be
XXX moved to (most likely) kern/kern_syscall.c.
lltable and llentry were introduced to replace ARP cache data structure
for further restructuring of the routing table: L2 nexthop cache
separation. This change replaces the NDP cache data structure
(llinfo_nd6) with them as well as ARP.
One noticeable change is for neighbor cache GC mechanism that was
introduced to prevent IPv6 DoS attacks. net.inet6.ip6.neighborgcthresh
was the max number of caches that we store in the system. After
introducing lltable/llentry, the value is changed to be per-interface
basis because lltable/llentry stores neighbor caches in each interface
separately. And the change brings one degradation; the old GC mechanism
dropped exceeded packets based on LRU while the new implementation drops
packets in order from the beginning of lltable (a hash table + linked
lists). It would be improved in the future.
Added functions in in6.c come from FreeBSD (as of r286629) and are
tweaked for NetBSD.
Proposed on tech-kern and tech-net.
for the files in the cdroms to be built. For now we copy the timestamp of
<sys/param.h>. We could set an absolute timestamp too like -T 0 for the epoch.
type. Can't print terminfo sequences directly; need to process them with
ti_puts() to handle padding. This removes the padding delays, and stricly
could break on slow terminal hardware, but they way the code is structured
makes it impossible to fix properly (since the formatting strings are
passed in the query).
XXX: pullup-7
We cannot rely on using copyinstr() to retrieve the pathname from
user mode after a successful exec, since the user mode address space
is no longer valid (and may not even be accessible). This worked in
earlier code but was broken by rev 1.7.
Fixes dmesg on NetBSD/dreamcast 7.0 (and probably NetBSD/hpcsh 7.0):
---
NetBSD 7.0 (GENERIC.201509250726Z)
SEGA Dreamcasttotal memory = 16384 KB
avail memory = 13668 KB
---
which was mangled when cpu_getmode() and cpu_setmodel() were introduced:
http://mail-index.netbsd.org/source-changes/2014/03/24/msg053273.html
Should be pulled up to netbsd-7 and netbsd-7-0.
