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      1 # $NetBSD: powerpc.s,v 1.1 2011/11/12 01:18:41 jmmv Exp $
      2 #
      3 # Copyright (c) 2011 The NetBSD Foundation, Inc.
      4 # All rights reserved.
      5 #
      6 # Redistribution and use in source and binary forms, with or without
      7 # modification, are permitted provided that the following conditions are
      8 # met:
      9 #
     10 # 1. Redistributions of source code must retain the above copyright
     11 #    notice, this list of conditions and the following disclaimer.
     12 # 2. Redistributions in binary form must reproduce the above copyright
     13 #    notice, this list of conditions and the following disclaimer in the
     14 #    documentation and/or other materials provided with the distribution.
     15 #
     16 # THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17 # ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     18 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
     19 # PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
     20 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     21 # EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     22 # PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     23 # PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
     24 # LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
     25 # NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
     26 # SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27 #
     28 
     29 # ------------------------------------------------------------------------
     30 
     31 .section ".note.netbsd.ident", "a"
     32 	# This ELF section is used by the kernel to determine, among other
     33 	# things, the system call interface used by the binary.
     34 	#
     35 	# See http://www.netbsd.org/docs/kernel/elf-notes.html for more
     36 	# details.
     37 
     38 	.int 7			# Length of the OS name field below.
     39 	.int 4			# Length of the description field below.
     40 	.int 0x01		# The type of the note: NetBSD OS Version.
     41 	.ascii	"NetBSD\0\0"	# The OS name, padded to 8 bytes.
     42 	.int 0x23b419a0		# The description value; 5.99.56.
     43 
     44 # ------------------------------------------------------------------------
     45 
     46 .section ".data"
     47 
     48 message:
     49 	.ascii "Hello, world!\n"
     50 	.set MESSAGE_SIZE, . - message
     51 
     52 # ------------------------------------------------------------------------
     53 
     54 .section ".text"
     55 
     56 	.balign 4
     57 
     58 	.globl _start
     59 	.type _start, @function
     60 _start:
     61 	# write(STDOUT_FILENO, message, MESSAGE_SIZE)
     62 	li	%r0, 4			# r0: write(2) syscall number.
     63 	li	%r3, 1			# r3: first argument.
     64 	addis	%r4, %r0, message@h	# r4: second argument.
     65 	ori	%r4, %r4, message@l
     66 	li	%r5, MESSAGE_SIZE	# r5: third argument.
     67 	sc
     68 
     69 	# exit(EXIT_SUCCESS)
     70 	li	%r0, 1			# r0: exit(2) syscall number.
     71 	li	%r3, 0			# r3: first argument.
     72 	sc
     73 
     74     .size _start, . - _start
     75