all: FreeBSD/ARM w/ cgo port

all: FreeBSD/ARM w/ cgo port
  only supports ARMv6K or higher ARM core.

Starting at Patch Set 6, cgo is supported.

TODO:
1. still need to regen syscall/z* and some runtime files
2. blindly uses LDREX(D) in runtime and sync/atomic, need fixing (i know FreeBSD provides at least a cas implementation just like linux's kernel helper)
3. document how to setup a test VM

Status:
i think it's fully working, misc/cgo/test passed.
Remaining test failures:
--- FAIL: TestMulticastListener (0.06 seconds)
multicast_posix_test.go:121:    "224.0.0.254:12345" not found in RIB
FAIL
FAIL    net     10.360s


Note:
i developed this inside qemu-system-arm in a FreeBSD 9 VBox VM,
so i'm eager to know if this works on real hardware.

Note: i use GUMSTIX-QEMU kernel config, i basically just followed http://matrossi.blogspot.com/2011/09/freebsd-arm-on-qemu-in-virtualbox.html
except that i hacked qemu/hw/{pxa2xx,gumstix}.c, qemu/target-arm/translate.c to
support ARMv6K LDREX(D) inst. on pxa255 and also provide 512MiB memory to the kernel.
On the FreeBSD kernel side, i hacked sys/arm/xscale/pxa/pxa_machdep.c to skip
sdram probe and just blindly use 512MiB of memory.

Please ignore changes to .hgignore, test/testlib, test/run, src/make.bash.