elf_freebsd.c revision 176348 
1/*-
2 * Copyright (c) 2001 Benno Rice <benno@FreeBSD.org>
3 * Copyright (c) 2007 Semihalf, Rafal Jaworowski <raj@semihalf.com>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
29__FBSDID("$FreeBSD: head/sys/boot/uboot/lib/elf_freebsd.c 176348 2008-02-16 22:13:11Z marcel $");
30
31#include <sys/param.h>
32#include <sys/linker.h>
33
34#include <machine/metadata.h>
35#include <machine/elf.h>
36
37#include <stand.h>
38
39#include "bootstrap.h"
40
41int
42__elfN(uboot_load)(char *filename, u_int64_t dest,
43    struct preloaded_file **result)
44{
45	int	r;
46
47	r = __elfN(loadfile)(filename, dest, result);
48	if (r != 0)
49		return (r);
50
51#if defined(__powerpc__)
52	/*
53	 * No need to sync the icache for modules: this will
54	 * be done by the kernel after relocation.
55	 */
56	if (!strcmp((*result)->f_type, "elf kernel"))
57		__syncicache((void *) (*result)->f_addr, (*result)->f_size);
58#endif
59	return (0);
60}
61
62int
63__elfN(uboot_exec)(struct preloaded_file *fp)
64{
65	struct file_metadata	*fmp;
66	vm_offset_t		mdp;
67	Elf_Ehdr		*e;
68	int			error;
69
70	if ((fmp = file_findmetadata(fp, MODINFOMD_ELFHDR)) == NULL) {
71		return (EFTYPE);
72	}
73	e = (Elf_Ehdr *)&fmp->md_data;
74
75	if ((error = md_load(fp->f_args, &mdp)) != 0)
76		return (error);
77
78	printf("Kernel entry at 0x%lx ...\n", e->e_entry);
79
80	dev_cleanup();
81
82	(*(void (*)())e->e_entry)((void *)mdp);
83	panic("exec returned");
84}
85
86struct file_format uboot_elf =
87{
88	__elfN(uboot_load),
89	__elfN(uboot_exec)
90};
91