elf_freebsd.c revision 332152 
1/*-
2 * Copyright (c) 2001 Benno Rice <benno@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
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: stable/11/stand/powerpc/ofw/elf_freebsd.c 332152 2018-04-06 20:27:55Z kevans $");
29
30#include <sys/param.h>
31#include <sys/linker.h>
32
33#include <machine/metadata.h>
34#include <machine/elf.h>
35#if defined(__powerpc__)
36#include <machine/md_var.h>
37#endif
38
39#include <stand.h>
40
41#include "bootstrap.h"
42#include "libofw.h"
43#include "openfirm.h"
44
45extern char		end[];
46extern vm_offset_t	reloc;	/* From <arch>/conf.c */
47
48int
49__elfN(ofw_loadfile)(char *filename, u_int64_t dest,
50    struct preloaded_file **result)
51{
52	int	r;
53
54	r = __elfN(loadfile)(filename, dest, result);
55	if (r != 0)
56		return (r);
57
58#if defined(__powerpc__)
59	/*
60	 * No need to sync the icache for modules: this will
61	 * be done by the kernel after relocation.
62	 */
63	if (!strcmp((*result)->f_type, "elf kernel"))
64		__syncicache((void *) (*result)->f_addr, (*result)->f_size);
65#endif
66	return (0);
67}
68
69int
70__elfN(ofw_exec)(struct preloaded_file *fp)
71{
72	struct file_metadata	*fmp;
73	vm_offset_t		mdp, dtbp;
74	Elf_Ehdr		*e;
75	int			error;
76	intptr_t		entry;
77
78	if ((fmp = file_findmetadata(fp, MODINFOMD_ELFHDR)) == NULL) {
79		return(EFTYPE);
80	}
81	e = (Elf_Ehdr *)&fmp->md_data;
82	entry = e->e_entry;
83
84	if ((error = md_load(fp->f_args, &mdp, &dtbp)) != 0)
85		return (error);
86
87	printf("Kernel entry at 0x%lx ...\n", e->e_entry);
88
89	dev_cleanup();
90	if (dtbp != 0) {
91		OF_quiesce();
92		((int (*)(u_long, u_long, u_long, void *, u_long))entry)(dtbp,
93		    0, 0, (void *)mdp, 0xfb5d104d);
94	} else {
95		OF_chain((void *)reloc, end - (char *)reloc, (void *)entry,
96		    (void *)mdp, 0xfb5d104d);
97	}
98
99	panic("exec returned");
100}
101
102struct file_format	ofw_elf =
103{
104	__elfN(ofw_loadfile),
105	__elfN(ofw_exec)
106};
107