elf64_freebsd.c revision 113083 
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/elf64_freebsd.c 113083 2003-04-04 16:35:16Z phk $
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	elf_exec(struct preloaded_file *amp);
42
43struct file_format i386_elf = { elf_loadfile, elf_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
51elf_exec(struct preloaded_file *fp)
52{
53    struct file_metadata	*md;
54    Elf_Ehdr 			*ehdr;
55    vm_offset_t			entry, bootinfop;
56    int				boothowto, err, bootdev;
57    struct bootinfo		*bi;
58    vm_offset_t			ssym, esym;
59
60    if ((md = file_findmetadata(fp, MODINFOMD_ELFHDR)) == NULL)
61	return(EFTYPE);			/* XXX actually EFUCKUP */
62    ehdr = (Elf_Ehdr *)&(md->md_data);
63
64    if ((err = bi_load(fp->f_args, &boothowto, &bootdev, &bootinfop)) != 0)
65	return(err);
66    entry = ehdr->e_entry & 0xffffff;
67
68    ssym = esym = 0;
69    if ((md = file_findmetadata(fp, MODINFOMD_SSYM)) != NULL)
70	ssym = *((vm_offset_t *)&(md->md_data));
71    if ((md = file_findmetadata(fp, MODINFOMD_ESYM)) != NULL)
72	esym = *((vm_offset_t *)&(md->md_data));
73    if (ssym == 0 || esym == 0)
74	ssym = esym = 0;		/* sanity */
75    bi = (struct bootinfo *)PTOV(bootinfop);
76    bi->bi_symtab = ssym;	/* XXX this is only the primary kernel symtab */
77    bi->bi_esymtab = esym;
78
79
80#ifdef DEBUG
81    printf("Start @ 0x%lx ...\n", entry);
82#endif
83
84    dev_cleanup();
85    __exec((void *)entry, boothowto, bootdev, 0, 0, 0, bootinfop);
86
87    panic("exec returned");
88}
89