xref: /src/sys/arch/ia64/stand/common/load_elf64.c

/*	$NetBSD: load_elf64.c,v 1.1 2006/04/07 14:21:29 cherry Exp $	*/

/*-
 * Copyright (c) 1998 Michael Smith <msmith (at) freebsd.org>
 * Copyright (c) 1998 Peter Wemm <peter (at) freebsd.org>
 * 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 AUTHOR 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 AUTHOR 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 <sys/cdefs.h>

#include <sys/param.h>
#include <sys/exec.h>

#include <lib/libsa/stand.h>
#include <lib/libsa/loadfile.h>

#include "bootstrap.h"

#ifdef BOOT_ELF64

/*
 * Attempt to load the file (file) as an ELF module.  It will be stored at
 * (dest), and a pointer to a module structure describing the loaded object
 * will be saved in (result).
 */
int
elf64_loadfile(char *filename, u_int64_t dest, struct preloaded_file **result)
{
    struct preloaded_file	*fp;
    u_long                      *marks;
    int				err;
    u_int			pad;
    ssize_t			bytes_read;
    int                         fd;

    /*
     * Open the image, read and validate the ELF header
     */
    if (filename == NULL)	/* can't handle nameless */
	return(EFTYPE);

    fp = file_alloc();
    marks = fp->marks;

    if (fp == NULL) {
	    printf("elf64_loadfile: cannot allocate module info\n");
	    err = EPERM;
	    goto out;
    }

    fp->f_name = strdup(filename);
    fp->f_type = strdup(ELF64_KERNELTYPE);

    marks[MARK_START] = dest;

    if ((fd = loadfile(filename, marks, LOAD_KERNEL)) == -1)
	    goto oerr;
    close(fd);

    dest = marks[MARK_ENTRY];

    printf("%s entry at 0x%lx\n", filename, (uintmax_t)dest);

    fp->f_size = marks[MARK_END] - marks[MARK_START];
    fp->f_addr = marks[MARK_START];

    if (fp->f_size == 0 || fp->f_addr == 0)
	goto ioerr;

    /* Load OK, return module pointer */
    *result = fp;
    err = 0;
    goto out;

 ioerr:
    err = EIO;
 oerr:
    file_discard(fp);
 out:
    return(err);
}

#endif /*BOOT_ELF64*/