ppc64_elf_freebsd.c revision 276687 
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: user/nwhitehorn/kboot/powerpc/kboot/ppc64_elf_freebsd.c 276687 2015-01-05 04:30:21Z nwhitehorn $");
29
30#define __ELF_WORD_SIZE 64
31
32#include <sys/param.h>
33#include <sys/linker.h>
34
35#include <machine/metadata.h>
36#include <machine/elf.h>
37
38#include <stand.h>
39
40#include "bootstrap.h"
41#include "host_syscall.h"
42
43extern char		end[];
44extern vm_offset_t	reloc;	/* From <arch>/conf.c */
45extern void		*kerneltramp;
46extern size_t		szkerneltramp;
47extern int		nkexec_segments;
48extern void *		loaded_segments;
49
50int
51ppc64_elf_loadfile(char *filename, u_int64_t dest,
52    struct preloaded_file **result)
53{
54	int	r;
55
56	r = __elfN(loadfile)(filename, dest, result);
57	if (r != 0)
58		return (r);
59
60	return (0);
61}
62
63int
64ppc64_elf_exec(struct preloaded_file *fp)
65{
66	struct file_metadata	*fmp;
67	vm_offset_t		mdp, dtb;
68	Elf_Ehdr		*e;
69	int			error;
70	uint32_t		*trampoline;
71	vm_offset_t		trampolinebase = 96*1024*1024; /* XXX */
72
73	if ((fmp = file_findmetadata(fp, MODINFOMD_ELFHDR)) == NULL) {
74		return(EFTYPE);
75	}
76	e = (Elf_Ehdr *)&fmp->md_data;
77
78	/* Handle function descriptor */
79	trampoline = malloc(szkerneltramp);
80	memcpy(trampoline, &kerneltramp, szkerneltramp);
81	trampoline[2] = e->e_entry;
82	trampoline[4] = 0; /* Phys. mem offset */
83	trampoline[5] = 0; /* OF entry point */
84
85	if ((error = md_load64(fp->f_args, &mdp, &dtb)) != 0)
86		return (error);
87
88	trampoline[3] = dtb;
89	trampoline[6] = mdp;
90	trampoline[7] = sizeof(mdp);
91	printf("Kernel entry at %#jx ...\n", e->e_entry);
92
93	dev_cleanup();
94
95	archsw.arch_copyin(trampoline, trampolinebase, szkerneltramp);
96	free(trampoline);
97
98	error = kexec_load(trampolinebase, nkexec_segments, &loaded_segments);
99	if (error != 0)
100		panic("kexec_load returned error: %d", error);
101	error = host_reboot(0xfee1dead, 672274793,
102	    0x45584543 /* LINUX_REBOOT_CMD_KEXEC */, NULL);
103	if (error != 0)
104		panic("reboot returned error: %d", error);
105	while (1) {}
106
107	panic("exec returned");
108}
109
110struct file_format	ppc_elf64 =
111{
112	ppc64_elf_loadfile,
113	ppc64_elf_exec
114};
115