1/*	$NetBSD: load_elf64.c,v 1.4 2017/10/15 01:28:32 maya Exp $	*/
2
3/*-
4 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
5 * Copyright (c) 1998 Peter Wemm <peter@freebsd.org>
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
31/* __FBSDID("$FreeBSD: src/sys/boot/common/load_elf.c,v 1.30.2.1 2004/09/03 19:25:40 iedowse Exp $"); */
32
33#include <sys/param.h>
34#include <sys/exec.h>
35
36#include <lib/libsa/stand.h>
37#include <lib/libsa/loadfile.h>
38
39#include "bootstrap.h"
40
41#ifdef BOOT_ELF64
42
43/*
44 * Attempt to load the file (file) as an ELF module.  It will be stored at
45 * (dest), and a pointer to a module structure describing the loaded object
46 * will be saved in (result).
47 */
48int
49elf64_loadfile(char *filename, u_int64_t dest, struct preloaded_file **result)
50{
51    struct preloaded_file	*fp;
52    u_long                      *marks;
53    int				err;
54    u_int			pad;
55    ssize_t			bytes_read;
56    int                         fd;
57
58    /*
59     * Open the image, read and validate the ELF header
60     */
61    if (filename == NULL)	/* can't handle nameless */
62	return(EFTYPE);
63
64    fp = file_alloc();
65
66    if (fp == NULL) {
67	    printf("elf64_loadfile: cannot allocate module info\n");
68	    err = EPERM;
69	    goto out;
70    }
71
72    marks = fp->marks;
73    fp->f_name = strdup(filename);
74    fp->f_type = strdup(ELF64_KERNELTYPE);
75
76    marks[MARK_START] = dest;
77
78    if ((fd = loadfile(filename, marks, LOAD_KERNEL)) == -1) {
79	    err = EPERM;
80	    goto oerr;
81    }
82    close(fd);
83
84    dest = marks[MARK_ENTRY];
85
86    printf("%s entry at 0x%lx\n", filename, (uintmax_t)dest);
87
88    fp->f_size = marks[MARK_END] - marks[MARK_START];
89    fp->f_addr = marks[MARK_START];
90
91    if (fp->f_size == 0 || fp->f_addr == 0)
92	goto ioerr;
93
94    /* Load OK, return module pointer */
95    *result = fp;
96    err = 0;
97    goto out;
98
99 ioerr:
100    err = EIO;
101 oerr:
102    file_discard(fp);
103 out:
104    return(err);
105}
106
107#endif /*BOOT_ELF64*/
108