fs: Add semihosting filesystem
This adds a filesystem which is backed by the host's filesystem. It is
modeled off of sandboxfs, which has very similar aims. Semihosting
doesn't support listing directories (except with SYS_SYSTEM), so neither
do we. it's possible to optimize a bit for the common case of reading a
whole file by omitting a call to smh_seek, but this is left as a future
optimization.
Signed-off-by: Sean Anderson <sean.anderson@seco.com>
diff --git a/fs/Makefile b/fs/Makefile
index f05a21c..4bed2ff 100644
--- a/fs/Makefile
+++ b/fs/Makefile
@@ -21,6 +21,7 @@
obj-$(CONFIG_FS_JFFS2) += jffs2/
obj-$(CONFIG_CMD_REISER) += reiserfs/
obj-$(CONFIG_SANDBOX) += sandbox/
+obj-$(CONFIG_SEMIHOSTING) += semihostingfs.o
obj-$(CONFIG_CMD_UBIFS) += ubifs/
obj-$(CONFIG_YAFFS2) += yaffs2/
obj-$(CONFIG_CMD_ZFS) += zfs/