Make struct xinpcb and friends word-size independent.

Replace size_t members with ksize_t (uint64_t) and pointer members
(never used as pointers in userspace, but instead as unique
idenitifiers) with kvaddr_t (uint64_t). This makes the structs
identical between 32-bit and 64-bit ABIs.

On 64-bit bit systems, the ABI is maintained. On 32-bit systems,
this is an ABI breaking change. The ABI of most of these structs
was previously broken in r315662.  This also imposes a small API
change on userspace consumers who must handle kernel pointers
becoming virtual addresses.

PR:		228301 (exp-run by antoine)
Reviewed by:	jtl, kib, rwatson (various versions)
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D15386

1 files changed, 8 insertions, 0 deletions

diff --git a/UPDATING b/UPDATING
index 266bea6cc70e0..6063ad03fa180 100644
--- a/UPDATING
+++ b/UPDATING
@@ -31,6 +31,14 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 12.x IS SLOW:
 	disable the most expensive debugging functionality run
 	"ln -s 'abort:false,junk:false' /etc/malloc.conf".)
 
+20180705:
+	The ABI of syscalls used by management tools like sockstat and
+	netstat has been broken to allow 32-bit binaries to work on
+	64-bit kernels without modification.  These programs will need
+	to match the kernel in order to function.  External programs may
+	require minor modifications to accommodate a change of type in
+	structures from pointers to 64-bit virtual addresses.
+
 20180702:
 	On i386 and amd64 atomics are now inlined. Out of tree modules using
 	atomics will need to be rebuilt.