* Added support freebsd-boot partition on GPT.
* FreeBSD's sed doesn't support '\t', change to tab.
* grub2-probe is used instead of grub-probe on Gentoo.

Taken from FreeBSD ports
patch-include-grub-gpt_partition.h
patch-util-i386-pc-grub-setup.c
patch-util-grub.d-10_kfreebsd.in

diff -Nur grub-2.00.orig/grub-core/partmap/gpt.c grub-2.00/grub-core/partmap/gpt.c
--- grub-2.00.orig/grub-core/partmap/gpt.c	2012-05-22 06:12:44.000000000 +0900
+++ grub-2.00/grub-core/partmap/gpt.c	2012-11-06 23:23:27.000000000 +0900
@@ -37,6 +37,8 @@
 
 #ifdef GRUB_UTIL
 static const grub_gpt_part_type_t grub_gpt_partition_type_bios_boot = GRUB_GPT_PARTITION_TYPE_BIOS_BOOT;
+static const grub_gpt_part_type_t grub_gpt_partition_type_freebsd_boot = GRUB_GPT_PARTITION_TYPE_FREEBSD_BOOT;
+static const grub_gpt_part_type_t grub_gpt_partition_type_solaris_boot = GRUB_GPT_PARTITION_TYPE_SOLARIS_BOOT;
 #endif
 
 /* 512 << 7 = 65536 byte sectors.  */
@@ -158,7 +160,9 @@
     disk->partition = p2;
 
     /* If there's an embed region, it is in a dedicated partition.  */
-    if (! grub_memcmp (&gptdata.type, &grub_gpt_partition_type_bios_boot, 16))
+    if (! grub_memcmp (&gptdata.type, &grub_gpt_partition_type_bios_boot, 16) ||
+          ! grub_memcmp (&gptdata.type, &grub_gpt_partition_type_freebsd_boot, 16) ||
+            ! grub_memcmp (&gptdata.type, &grub_gpt_partition_type_solaris_boot, 16))
       {
 	start = p->start;
 	len = p->len;
diff -Nur grub-2.00.orig/include/grub/gpt_partition.h grub-2.00/include/grub/gpt_partition.h
--- grub-2.00.orig/include/grub/gpt_partition.h	2012-01-28 22:51:46.000000000 +0900
+++ grub-2.00/include/grub/gpt_partition.h	2012-11-06 23:18:11.000000000 +0900
@@ -50,6 +50,21 @@
 	{ 0x85, 0xD2, 0xE1, 0xE9, 0x04, 0x34, 0xCF, 0xB3 }	\
   }
 
+#define GRUB_GPT_PARTITION_TYPE_FREEBSD_BOOT \
+  { grub_cpu_to_le32_compile_time (0x83BD6B9D), \
+      grub_cpu_to_le16_compile_time (0x7F41), \
+      grub_cpu_to_le16_compile_time (0x11DC), \
+        { 0xBE, 0x0B, 0x00, 0x15, 0x60, 0xB8, 0x4F, 0x0F } \
+  }
+  
+#define GRUB_GPT_PARTITION_TYPE_SOLARIS_BOOT \
+  { grub_cpu_to_le32_compile_time (0x6A82CB45), \
+      grub_cpu_to_le16_compile_time (0x1DD2), \
+      grub_cpu_to_le16_compile_time (0x11B2), \
+        { 0x99, 0xA6, 0x08, 0x00, 0x20, 0x73, 0x66, 0x31 } \
+  }
+
+
 struct grub_gpt_header
 {
   grub_uint8_t magic[8];
diff -Nur grub-2.00.orig/util/grub.d/10_kfreebsd.in grub-2.00/util/grub.d/10_kfreebsd.in
--- grub-2.00.orig/util/grub.d/10_kfreebsd.in	2012-03-05 06:02:30.000000000 +0900
+++ grub-2.00/util/grub.d/10_kfreebsd.in	2012-11-07 20:01:10.000000000 +0900
@@ -54,7 +54,7 @@
   fi
 
   if [ -z "${prepare_module_dir_cache}" ]; then
-    prepare_module_dir_cache="$(prepare_grub_to_access_device $(grub-probe -t device "${module_dir}") | sed -e "s/^/\t/")"
+    prepare_module_dir_cache="$(prepare_grub_to_access_device $(grub2-probe -t device "${module_dir}") | sed -e "s/^/	/")"
   fi
 
   printf '%s\n' "${prepare_module_dir_cache}"
@@ -91,10 +91,10 @@
       echo "menuentry '$(echo "$OS" | grub_quote)' ${CLASS} \$menuentry_id_option 'kfreebsd-simple-$boot_device_id' {" | sed "s/^/$submenu_indentation/"
   fi
   if [ x$type != xrecovery ] ; then
-      save_default_entry | sed -e "s/^/\t/" | sed "s/^/$submenu_indentation/"
+      save_default_entry | sed -e "s/^/	/" | sed "s/^/$submenu_indentation/"
   fi
   if [ -z "${prepare_boot_cache}" ]; then
-    prepare_boot_cache="$(prepare_grub_to_access_device ${GRUB_DEVICE_BOOT} | sed -e "s/^/\t/")"
+    prepare_boot_cache="$(prepare_grub_to_access_device ${GRUB_DEVICE_BOOT} | sed -e "s/^/	/")"
   fi
 
   printf '%s\n' "${prepare_boot_cache}" | sed "s/^/$submenu_indentation/"
@@ -112,7 +112,7 @@
 
   load_kfreebsd_module acpi true
 
-  for abstraction in dummy $(grub-probe -t abstraction --device ${GRUB_DEVICE}) ; do
+  for abstraction in dummy $(grub2-probe -t abstraction --device ${GRUB_DEVICE}) ; do
     case $abstraction in
       lvm) load_kfreebsd_module geom_linux_lvm false ;;
     esac
@@ -122,10 +122,17 @@
     zfs)
       load_kfreebsd_module opensolaris false
 
-      ls "${dirname}/zfs/zpool.cache" > /dev/null
+      if [ -f /boot/zfs/zpool.cache ] ; then
+	zpoolcache=/boot/zfs/zpool.cache
+	zpoolcache_dirname=`dirname $zpoolcache`
+	zpoolcache_rel_dirname=`make_system_path_relative_to_its_root $zpoolcache_dirname`
+      else
+	ls "${dirname}/zfs/zpool.cache" > /dev/null
+	zpoolcache_rel_dirname=${rel_dirname}/zfs
+      fi
       printf '%s\n' "${prepare_boot_cache}"
       sed "s/^/$submenu_indentation/" << EOF
-	kfreebsd_module		${rel_dirname}/zfs/zpool.cache type=/boot/zfs/zpool.cache
+	kfreebsd_module		${zpoolcache_rel_dirname}/zpool.cache type=/boot/zfs/zpool.cache
 EOF
     ;;
   esac
@@ -179,7 +186,7 @@
   case ${GRUB_FS} in
     zfs)
 			# zpool name
-			kfreebsd_device=$(grub-probe -t fs_label --device ${GRUB_DEVICE})
+			kfreebsd_device=$(grub2-probe -t fs_label --device ${GRUB_DEVICE})
 			# filesystem name (empty string for the main filesystem)
 			kfreebsd_device="${kfreebsd_device}$(${grub_mkrelpath} / | sed -e "s,/*@$,,")"
     ;;
@@ -213,7 +220,7 @@
 
   if [ "x$is_first_entry" = xtrue ]; then
       kfreebsd_entry "${OS}" "${version}" simple
-      submenu_indentation="\t"
+      submenu_indentation="	"
     
       if [ -z "$boot_device_id" ]; then
 	  boot_device_id="$(grub_get_device_id "${GRUB_DEVICE}")"