kfreebsd-i386 boot test support

tests/boot/kfreebsd.init-i386.S

@@ -0,0 +1,74 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2010  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define MODE_RDRW 2
+#define FLAGS_NONE 0
+#define SYSCALL_OPEN 5
+#define SYSCALL_WRITE 4
+#define SYSCALL_RESET 55
+#define SYSCALL_EXIT 1
+#define SYSCALL_INT 0x80
+
+#define RESET_NOSYNC 0x4
+#define RESET_HALT 0x8
+#define RESET_POWEROFF 0x4000
+
+	.section ".init", "ax"
+	.global start,_start
+start:
+_start:
+	/* open.  */
+	movl $SYSCALL_OPEN, %eax
+	pushl $FLAGS_NONE
+	pushl $MODE_RDRW
+	leal device, %ebx
+	pushl %ebx
+	pushl $0
+	int $SYSCALL_INT
+	addl $16, %esp
+	movl %eax, %ecx
+
+	/* write.  */
+	movl $SYSCALL_WRITE, %eax
+	pushl $(messageend-message)
+	leal message, %ebx
+	pushl %ebx
+	pushl %ecx
+	pushl $0
+	int $SYSCALL_INT
+	addl $16, %esp
+	
+	/* shutdown.  */
+	movl $SYSCALL_RESET, %eax
+	pushl $(RESET_POWEROFF|RESET_HALT|RESET_NOSYNC)
+	pushl $0
+	int $SYSCALL_INT
+	addl $8, %esp
+
+	/* exit (1). Shouldn't be reached.  */
+	movl $SYSCALL_EXIT, %eax
+	pushl $1
+	pushl $0
+	int $SYSCALL_INT
+device:
+	.ascii "/dev/console"
+	.byte 0
+message:
+	.ascii "Boot Test Passed Successfully\n" SUCCESSFUL_BOOT_STRING "\n"
+messageend:
+