/* $NetBSD: sh3.s,v 1.1 2022/10/14 19:41:18 ryo Exp $ */ /*- * Copyright (c) 2022 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. */ /* * assemble & link: * as -o sh3.o sh3.s * ld -o hello -e __start sh3.o */ /* ------------------------------------------------------------------ */ /* * This ELF section is used by the kernel to determine, among other * things, the system call interface used by the binary. * * Normally, /usr/lib/crti.o is linked, but here it is written manually. * * SEE ALSO: * - http://www.netbsd.org/docs/kernel/elf-notes.html * - src/sys/sys/exec_elf.h * - src/lib/csu/common/sysident.S * - src/lib/csu/arch/sh3/crti.S */ .section ".note.netbsd.ident", "a" .p2align 2 .long 7 /* ELF_NOTE_NETBSD_NAMESZ */ .long 4 /* ELF_NOTE_NETBSD_DESCSZ */ .long 1 /* ELF_NOTE_TYPE_NETBSD_TAG */ .ascii "NetBSD\0\0" /* ELF_NOTE_NETBSD_NAME */ .long 999010000 /* __NetBSD_Version__ (sys/sys/param.h) */ /* ------------------------------------------------------------------ */ .section ".rodata" message: .ascii "Hello, world!\n" .set MESSAGE_SIZE, . - message /* ------------------------------------------------------------------ */ .section ".text" .p2align 2 .global __start .type _start, %function __start: /* write(STDOUT_FILENO, message, MESSAGE_SIZE) */ mov #1, r4 /* r4: fd = STDOUT_FILENO */ mov.l .Lmessage, r5 /* r5: buf = message */ mov #MESSAGE_SIZE, r6 /* r6: nbytes = MESSAGE_SIZE */ mov #4, r0 /* SYS_write */ trapa #0x80 /* exit(0) */ mov #0, r4 /* r4: status = 0 */ mov #1, r0 /* SYS_exit */ trapa #0x80 .p2align 2 .Lmessage: .long message .size __start, . - __start |