elf_freebsd.c revision 235694 
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 235694 2012-05-20 18:07:35Z kientzle $");
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#include "libuboot.h"
42
43extern vm_offset_t md_load(char *, vm_offset_t *);
44
45int
46__elfN(uboot_load)(char *filename, u_int64_t dest,
47    struct preloaded_file **result)
48{
49	int r;
50
51	r = __elfN(loadfile)(filename, dest, result);
52	if (r != 0)
53		return (r);
54
55#if defined(__powerpc__)
56	/*
57	 * No need to sync the icache for modules: this will
58	 * be done by the kernel after relocation.
59	 */
60	if (!strcmp((*result)->f_type, "elf kernel"))
61		__syncicache((void *) (*result)->f_addr, (*result)->f_size);
62#endif
63	return (0);
64}
65
66int
67__elfN(uboot_exec)(struct preloaded_file *fp)
68{
69	struct file_metadata *fmp;
70	vm_offset_t mdp;
71	Elf_Ehdr *e;
72	int error;
73	void (*entry)(void *);
74
75	if ((fmp = file_findmetadata(fp, MODINFOMD_ELFHDR)) == NULL)
76		return (EFTYPE);
77
78	e = (Elf_Ehdr *)&fmp->md_data;
79
80	if ((error = md_load(fp->f_args, &mdp)) != 0)
81		return (error);
82
83	entry = uboot_vm_translate(e->e_entry);
84	printf("Kernel entry at 0x%x...\n", (unsigned)entry);
85
86	dev_cleanup();
87
88	(*entry)((void *)mdp);
89	panic("exec returned");
90}
91
92struct file_format uboot_elf = {
93	__elfN(uboot_load),
94	__elfN(uboot_exec)
95};
96