1 /*
2 * Copyright (c) 1998 Michael Smith <msmith@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
29 #include <sys/param.h>
30 #include <sys/exec.h>
31 #include <sys/linker.h>
32 #include <string.h>
33 #include <machine/bootinfo.h>
34 #include <machine/elf.h>
35 #include <stand.h>
36
37 #include "bootstrap.h"
38 #include "libi386.h"
39 #include "btxv86.h"
40
41 static int elf32_exec(struct preloaded_file *amp);
42 static int elf32_obj_exec(struct preloaded_file *amp);
43
44 struct file_format i386_elf = { elf32_loadfile, elf32_exec };
45 struct file_format i386_elf_obj = { elf32_obj_loadfile, elf32_obj_exec };
46
47 /*
48 * There is an ELF kernel and one or more ELF modules loaded.
49 * We wish to start executing the kernel image, so make such
50 * preparations as are required, and do so.
51 */
52 static int
elf32_exec(struct preloaded_file * fp)53 elf32_exec(struct preloaded_file *fp)
54 {
55 struct file_metadata *md;
56 Elf_Ehdr *ehdr;
57 vm_offset_t entry, bootinfop, modulep, kernend;
58 int boothowto, err, bootdev;
59
60 if ((md = file_findmetadata(fp, MODINFOMD_ELFHDR)) == NULL)
61 return(EFTYPE);
62 ehdr = (Elf_Ehdr *)&(md->md_data);
63
64 err = bi_load32(fp->f_args, &boothowto, &bootdev, &bootinfop, &modulep, &kernend);
65 if (err != 0)
66 return(err);
67 entry = ehdr->e_entry & 0xffffff;
68
69 #ifdef DEBUG
70 printf("Start @ 0x%lx ...\n", entry);
71 #endif
72
73 dev_cleanup();
74 __exec((void *)entry, boothowto, bootdev, 0, 0, 0, bootinfop, modulep, kernend);
75
76 panic("exec returned");
77 }
78
79 static int
elf32_obj_exec(struct preloaded_file * fp __unused)80 elf32_obj_exec(struct preloaded_file *fp __unused)
81 {
82 return (EFTYPE);
83 }
84