1 /* $NetBSD: load_elf64.c,v 1.4 2017/10/15 01:28:32 maya Exp $ */
2
3 /*-
4 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
5 * Copyright (c) 1998 Peter Wemm <peter@freebsd.org>
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 /* __FBSDID("$FreeBSD: src/sys/boot/common/load_elf.c,v 1.30.2.1 2004/09/03 19:25:40 iedowse Exp $"); */
32
33 #include <sys/param.h>
34 #include <sys/exec.h>
35
36 #include <lib/libsa/stand.h>
37 #include <lib/libsa/loadfile.h>
38
39 #include "bootstrap.h"
40
41 #ifdef BOOT_ELF64
42
43 /*
44 * Attempt to load the file (file) as an ELF module. It will be stored at
45 * (dest), and a pointer to a module structure describing the loaded object
46 * will be saved in (result).
47 */
48 int
elf64_loadfile(char * filename,u_int64_t dest,struct preloaded_file ** result)49 elf64_loadfile(char *filename, u_int64_t dest, struct preloaded_file **result)
50 {
51 struct preloaded_file *fp;
52 u_long *marks;
53 int err;
54 u_int pad;
55 ssize_t bytes_read;
56 int fd;
57
58 /*
59 * Open the image, read and validate the ELF header
60 */
61 if (filename == NULL) /* can't handle nameless */
62 return(EFTYPE);
63
64 fp = file_alloc();
65
66 if (fp == NULL) {
67 printf("elf64_loadfile: cannot allocate module info\n");
68 err = EPERM;
69 goto out;
70 }
71
72 marks = fp->marks;
73 fp->f_name = strdup(filename);
74 fp->f_type = strdup(ELF64_KERNELTYPE);
75
76 marks[MARK_START] = dest;
77
78 if ((fd = loadfile(filename, marks, LOAD_KERNEL)) == -1) {
79 err = EPERM;
80 goto oerr;
81 }
82 close(fd);
83
84 dest = marks[MARK_ENTRY];
85
86 printf("%s entry at 0x%lx\n", filename, (uintmax_t)dest);
87
88 fp->f_size = marks[MARK_END] - marks[MARK_START];
89 fp->f_addr = marks[MARK_START];
90
91 if (fp->f_size == 0 || fp->f_addr == 0)
92 goto ioerr;
93
94 /* Load OK, return module pointer */
95 *result = fp;
96 err = 0;
97 goto out;
98
99 ioerr:
100 err = EIO;
101 oerr:
102 file_discard(fp);
103 out:
104 return(err);
105 }
106
107 #endif /*BOOT_ELF64*/
108