/* LINTLIBRARY */
/*-
 * SPDX-License-Identifier: BSD-4-Clause
 *
 * Copyright 2001 David E. O'Brien.
 * All rights reserved.
 * Copyright 1996-1998 John D. Polstra.
 * All rights reserved.
 * Copyright (c) 1997 Jason R. Thorpe.
 * Copyright (c) 1995 Christopher G. Demetriou
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *          This product includes software developed for the
 *          FreeBSD Project.  See https://www.freebsd.org/ for
 *          information about FreeBSD.
 *          This product includes software developed for the
 *          NetBSD Project.  See http://www.netbsd.org/ for
 *          information about NetBSD.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include <stdlib.h>
#include <stdint.h>
#include <sys/elf.h>

static uint32_t cpu_features;
static uint32_t cpu_features2;

#include "libc_private.h"
#include "ignore_init.c"

struct Struct_Obj_Entry;
struct ps_strings;

extern void _start(int, char **, char **, const struct Struct_Obj_Entry *,
    void (*)(void), struct ps_strings *);

#ifdef GCRT
extern void _mcleanup(void);
extern void monstartup(void *, void *);
extern int eprol;
extern int etext;
#endif

struct ps_strings *__ps_strings;

static void
init_cpu_features(char **env)
{
	const Elf_Auxinfo *aux;

	/* Find the auxiliary vector on the stack. */
	while (*env++ != 0)	/* Skip over environment, and NULL terminator */
		;
	aux = (const Elf_Auxinfo *)env;

	/* Digest the auxiliary vector. */
	for (;  aux->a_type != AT_NULL; aux++) {
		switch (aux->a_type) {
		case AT_HWCAP:
			cpu_features = (uint32_t)aux->a_un.a_val;
			break;
		case AT_HWCAP2:
			cpu_features2 = (uint32_t)aux->a_un.a_val;
			break;
		}
	}
}


/* The entry function. */
/*
 * First 5 arguments are specified by the PowerPC SVR4 ABI.
 * The last argument, ps_strings, is a BSD extension.
 */
/* ARGSUSED */
void
_start(int argc, char **argv, char **env,
    const struct Struct_Obj_Entry *obj __unused, void (*cleanup)(void),
    struct ps_strings *ps_strings)
{

	handle_argv(argc, argv, env);

	if (ps_strings != (struct ps_strings *)0)
		__ps_strings = ps_strings;

	if (&_DYNAMIC != NULL)
		atexit(cleanup);
	else {
		init_cpu_features(env);
		process_irelocs();
		_init_tls();
	}

#ifdef GCRT
	atexit(_mcleanup);
	monstartup(&eprol, &etext);
#endif

	handle_static_init(argc, argv, env);
	exit(main(argc, argv, env));
}

#ifdef GCRT
__asm__(".text");
__asm__("eprol:");
__asm__(".previous");
#endif