11.4Sjoerg/* $NetBSD: crt0.S,v 1.4 2018/11/26 17:37:45 joerg Exp $ */ 21.1Smatt 31.1Smatt/*- 41.1Smatt * Copyright (c) 2013 The NetBSD Foundation, Inc. 51.1Smatt * All rights reserved. 61.1Smatt * 71.1Smatt * This code is derived from software contributed to The NetBSD Foundation 81.1Smatt * by Matt Thomas of 3am Software Foundry. 91.1Smatt * 101.1Smatt * Redistribution and use in source and binary forms, with or without 111.1Smatt * modification, are permitted provided that the following conditions 121.1Smatt * are met: 131.1Smatt * 1. Redistributions of source code must retain the above copyright 141.1Smatt * notice, this list of conditions and the following disclaimer. 151.1Smatt * 2. Redistributions in binary form must reproduce the above copyright 161.1Smatt * notice, this list of conditions and the following disclaimer in the 171.1Smatt * documentation and/or other materials provided with the distribution. 181.1Smatt * 191.1Smatt * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 201.1Smatt * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 211.1Smatt * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 221.1Smatt * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 231.1Smatt * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 241.1Smatt * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 251.1Smatt * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 261.1Smatt * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 271.1Smatt * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 281.1Smatt * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 291.1Smatt * POSSIBILITY OF SUCH DAMAGE. 301.1Smatt */ 311.1Smatt 321.1Smatt#include <mips/asm.h> 331.1Smatt 341.4SjoergRCSID("$NetBSD: crt0.S,v 1.4 2018/11/26 17:37:45 joerg Exp $") 351.1Smatt 361.1SmattSTRONG_ALIAS(_start,__start) 371.1Smatt 381.1Smatt/* 391.1Smatt * Assumes kernel (or ld_elf.so) passes the following parameters to 401.1Smatt * user-space in registers: 411.1Smatt * 421.1Smatt * a0 stack pointer (0 if setregs didn't fill this in) 431.1Smatt * a1 cleanup 441.1Smatt * a2 Obj_Entry 451.1Smatt * a3 ps_strings 461.1Smatt * 471.1Smatt * XXX Does this violate the ABI? 481.1Smatt * as well as the usual registers (pc, sp, and t9 == pc for ABI). 491.1Smatt */ 501.1Smatt 511.1SmattNESTED_NOPROFILE(__start, CALLFRAME_SIZ, ra) 521.2Smatt SETUP_GP 531.2Smatt SETUP_GP64(t3, __start) 541.1Smatt move a0, a1 /* cleanup */ 551.3Smatt PTR_L t9,%call16(_C_LABEL(___start))(gp) 561.4Sjoerg move a1, a3 /* ps_strings */ 571.3Smatt .reloc 1f,R_MIPS_JALR,___start 581.3Smatt1: jr t9 591.1SmattEND(__start) 60