minix/lib/csu/arch/mips/crt0.S

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/* $NetBSD: crt0.S,v 1.2 2013/06/25 16:47:47 matt Exp $ */
/*-
* Copyright (c) 2013 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Matt Thomas of 3am Software Foundry.
*
* 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.
*/
#include <mips/asm.h>
RCSID("$NetBSD: crt0.S,v 1.2 2013/06/25 16:47:47 matt Exp $")
STRONG_ALIAS(_start,__start)
/*
* Assumes kernel (or ld_elf.so) passes the following parameters to
* user-space in registers:
*
* a0 stack pointer (0 if setregs didn't fill this in)
* a1 cleanup
* a2 Obj_Entry
* a3 ps_strings
*
* XXX Does this violate the ABI?
* as well as the usual registers (pc, sp, and t9 == pc for ABI).
*/
NESTED_NOPROFILE(__start, CALLFRAME_SIZ, ra)
SETUP_GP
SETUP_GP64(t3, __start)
move a0, a1 /* cleanup */
move a1, a2 /* Obj_Entry */
move a2, a3 /* ps_strings */
j _C_LABEL(___start)
END(__start)