bpfjit

[Alexander Nasonov <alnsn%yandex.ru@localhost>]

After a successful testing of bpfjit on an emulated MALTA board, I
committed sljit support to evbmips. It's disabled my default but you
can easily enable it. To reproduce my setup, you need to apply the patch
below and build with MKSLJIT=yes.
I followed an instruction on gxemul page to install and run my system
under gxemul emulator. I also added "net.bpf.jit=1" to sysctl.conf
while following an installation instruction.
All sljit and bpfjit userspace tests pass and the system can filter
packets using simple rules.

Alex


Enable bpfjit on MALTA ebvmips board.

Index: sys/arch/evbmips/conf/MALTA
===================================================================
RCS file: /cvsroot/src/sys/arch/evbmips/conf/MALTA,v
retrieving revision 1.69
diff -p -u -u -r1.69 MALTA
--- sys/arch/evbmips/conf/MALTA 17 Oct 2012 14:48:11 -0000      1.69
+++ sys/arch/evbmips/conf/MALTA 24 Nov 2012 14:05:30 -0000
@@ -307,6 +307,9 @@ audio*              at clct?
 #pseudo-device md                              # memory disk device
(ramdisk)
 pseudo-device  vnd                             # disk-like interface to
files

+options SLJIT
+options BPFJIT
+
 # Network pseudo-devices
 pseudo-device  bpfilter                        # Berkeley packet filter
 pseudo-device  ipfilter                        # IP filter (firewall)
and NAT
Index: sys/arch/evbmips/conf/files.malta
===================================================================
RCS file: /cvsroot/src/sys/arch/evbmips/conf/files.malta,v
retrieving revision 1.18
diff -p -u -u -r1.18 files.malta
--- sys/arch/evbmips/conf/files.malta   9 Jul 2011 16:03:01 -0000
1.18
+++ sys/arch/evbmips/conf/files.malta   24 Nov 2012 14:05:30 -0000
@@ -26,6 +26,12 @@ device       cpu
 attach cpu at mainbus
 file   arch/evbmips/evbmips/cpu.c              cpu

+#
+# Stack-less Just-In-Time compiler
+#
+
+include        "external/bsd/sljit/conf/files.sljit"
+
 # Machine-independent I2O drivers.
 include "dev/i2o/files.i2o"