# $NetBSD: powerpc.s,v 1.1 2011/11/12 01:18:41 jmmv Exp $
#
# Copyright (c) 2011 The NetBSD Foundation, Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
# PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#

# ------------------------------------------------------------------------

.section ".note.netbsd.ident", "a"
        # This ELF section is used by the kernel to determine, among other
        # things, the system call interface used by the binary.
        #
        # See http://www.netbsd.org/docs/kernel/elf-notes.html for more
        # details.

        .int 7                  # Length of the OS name field below.
        .int 4                  # Length of the description field below.
        .int 0x01               # The type of the note: NetBSD OS Version.
        .ascii  "NetBSD\0\0"    # The OS name, padded to 8 bytes.
        .int 0x23b419a0         # The description value; 5.99.56.

# ------------------------------------------------------------------------

.section ".data"

message:
        .ascii "Hello, world!\n"
        .set MESSAGE_SIZE, . - message

# ------------------------------------------------------------------------

.section ".text"

        .balign 4

        .globl _start
        .type _start, @function
_start:
        # write(STDOUT_FILENO, message, MESSAGE_SIZE)
        li      %r0, 4                  # r0: write(2) syscall number.
        li      %r3, 1                  # r3: first argument.
        addis   %r4, %r0, message@h     # r4: second argument.
        ori     %r4, %r4, message@l
        li      %r5, MESSAGE_SIZE       # r5: third argument.
        sc

        # exit(EXIT_SUCCESS)
        li      %r0, 1                  # r0: exit(2) syscall number.
        li      %r3, 0                  # r3: first argument.
        sc

    .size _start, . - _start