/*      $OpenBSD: start.S,v 1.4 2021/02/17 14:42:20 visa Exp $  */

/*
 * Copyright (c) 2010 Miodrag Vallat.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <machine/asm.h>
#include <machine/regdef.h>
#include <mips64/mips_cpu.h>

        .set    noreorder
        .set    mips3

        .data
pmon_ra:
        .dword  0
pmon_sp:
        .dword  0

        .text

        .globl  __start
        .ent    __start, 0
__start:
        LA      t0, __start - FRAMESZ(CF_SZ)
        PTR_S   ra, pmon_ra             # save pmon return address
        PTR_S   sp, pmon_sp             # and stack
        move    sp, t0
        jal     pmon_init               # pmon_init(argc, argv, envp, callvec,
        mfc0    a4, COP_0_PRID          #     prid)
        jal     pmon_probe_abi
        nop
        jal     main
        nop
        /* FALLTHROUGH */
        .end    __start

        .globl  _rtt
        .ent    _rtt,0
_rtt:
        PTR_L   ra, pmon_ra
        PTR_L   sp, pmon_sp
        jr      ra
        nop
        .end    _rtt