elf32_freebsd.c revision 114379 
1/*-
2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/sys/boot/i386/libi386/elf32_freebsd.c 114379 2003-05-01 03:56:30Z peter $
27 */
28
29#include <sys/param.h>
30#include <sys/exec.h>
31#include <sys/linker.h>
32#include <string.h>
33#include <machine/bootinfo.h>
34#include <machine/elf.h>
35#include <stand.h>
36
37#include "bootstrap.h"
38#include "libi386.h"
39#include "btxv86.h"
40
41static int	elf32_exec(struct preloaded_file *amp);
42
43struct file_format i386_elf = { elf32_loadfile, elf32_exec };
44
45/*
46 * There is an a.out kernel and one or more a.out modules loaded.
47 * We wish to start executing the kernel image, so make such
48 * preparations as are required, and do so.
49 */
50static int
51elf32_exec(struct preloaded_file *fp)
52{
53    struct file_metadata	*md;
54    Elf_Ehdr 			*ehdr;
55    vm_offset_t			entry, bootinfop, modulep, kernend;
56    int				boothowto, err, bootdev;
57
58    if ((md = file_findmetadata(fp, MODINFOMD_ELFHDR)) == NULL)
59	return(EFTYPE);			/* XXX actually EFUCKUP */
60    ehdr = (Elf_Ehdr *)&(md->md_data);
61
62    err = bi_load32(fp->f_args, &boothowto, &bootdev, &bootinfop, &modulep, &kernend);
63    if (err != 0)
64	return(err);
65    entry = ehdr->e_entry & 0xffffff;
66
67#ifdef DEBUG
68    printf("Start @ 0x%lx ...\n", entry);
69#endif
70
71    dev_cleanup();
72    __exec((void *)entry, boothowto, bootdev, 0, 0, 0, bootinfop, modulep, kernend);
73
74    panic("exec returned");
75}
76