elf_freebsd.c revision 332150 
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: stable/11/stand/uboot/lib/elf_freebsd.c 332150 2018-04-06 20:24:50Z kevans $");
30
31#include <sys/param.h>
32#include <sys/linker.h>
33
34#ifdef __mips__
35#include <sys/proc.h>
36#include <machine/frame.h>
37#endif
38#include <machine/md_var.h>
39#include <machine/metadata.h>
40#include <machine/elf.h>
41
42#include <stand.h>
43
44#include "bootstrap.h"
45#include "libuboot.h"
46
47extern vm_offset_t md_load(char *, vm_offset_t *, vm_offset_t *);
48
49int
50__elfN(uboot_load)(char *filename, u_int64_t dest,
51    struct preloaded_file **result)
52{
53	int r;
54
55	r = __elfN(loadfile)(filename, dest, result);
56	if (r != 0)
57		return (r);
58
59#if defined(__powerpc__)
60	/*
61	 * No need to sync the icache for modules: this will
62	 * be done by the kernel after relocation.
63	 */
64	if (!strcmp((*result)->f_type, "elf kernel"))
65		__syncicache((void *) (*result)->f_addr, (*result)->f_size);
66#endif
67	return (0);
68}
69
70int
71__elfN(uboot_exec)(struct preloaded_file *fp)
72{
73	struct file_metadata *fmp;
74	vm_offset_t mdp;
75	Elf_Ehdr *e;
76	int error;
77	void (*entry)(void *);
78
79	if ((fmp = file_findmetadata(fp, MODINFOMD_ELFHDR)) == NULL)
80		return (EFTYPE);
81
82	e = (Elf_Ehdr *)&fmp->md_data;
83
84	if ((error = md_load(fp->f_args, &mdp, NULL)) != 0)
85		return (error);
86
87	entry = (void *)e->e_entry;
88	printf("Kernel entry at %p...\n", entry);
89
90	dev_cleanup();
91	printf("Kernel args: %s\n", fp->f_args);
92
93	(*entry)((void *)mdp);
94	panic("exec returned");
95}
96
97struct file_format uboot_elf = {
98	__elfN(uboot_load),
99	__elfN(uboot_exec)
100};
101