elf_freebsd.c revision 182723 
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 182723 2008-09-03 15:39:50Z raj $");
30
31#include <sys/param.h>
32#include <sys/linker.h>
33
34#include <machine/md_var.h>
35#include <machine/metadata.h>
36#include <machine/elf.h>
37
38#include <stand.h>
39
40#include "bootstrap.h"
41
42extern vm_offset_t md_load(char *, vm_offset_t *);
43
44int
45__elfN(uboot_load)(char *filename, u_int64_t dest,
46    struct preloaded_file **result)
47{
48	int r;
49
50	r = __elfN(loadfile)(filename, dest, result);
51	if (r != 0)
52		return (r);
53
54#if defined(__powerpc__)
55	/*
56	 * No need to sync the icache for modules: this will
57	 * be done by the kernel after relocation.
58	 */
59	if (!strcmp((*result)->f_type, "elf kernel"))
60		__syncicache((void *) (*result)->f_addr, (*result)->f_size);
61#endif
62	return (0);
63}
64
65int
66__elfN(uboot_exec)(struct preloaded_file *fp)
67{
68	struct file_metadata *fmp;
69	vm_offset_t mdp;
70	Elf_Ehdr *e;
71	int error;
72
73	if ((fmp = file_findmetadata(fp, MODINFOMD_ELFHDR)) == NULL)
74		return (EFTYPE);
75
76	e = (Elf_Ehdr *)&fmp->md_data;
77
78	if ((error = md_load(fp->f_args, &mdp)) != 0)
79		return (error);
80
81	printf("Kernel entry at 0x%x ...\n", e->e_entry);
82
83	dev_cleanup();
84
85	(*(void (*)())e->e_entry)((void *)mdp);
86	panic("exec returned");
87}
88
89struct file_format uboot_elf = {
90	__elfN(uboot_load),
91	__elfN(uboot_exec)
92};
93