1/*	$NetBSD: misc.c,v 1.8 2017/12/10 02:32:03 christos Exp $	*/
2
3/*-
4 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30/* __FBSDID("$FreeBSD: src/sys/boot/common/misc.c,v 1.8.4.1 2004/09/03 19:25:40 iedowse Exp $"); */
31
32#include <lib/libsa/stand.h>
33#include <lib/libsa/loadfile.h>
34#include <bootstrap.h>
35
36
37#define	min(A, B)	(((A) < (B)) ? (A) : (B))
38
39/*
40 * Concatenate the (argc) elements of (argv) into a single string, and return
41 * a copy of same.
42 */
43char *
44unargv(int argc, char *argv[])
45{
46    size_t	hlong;
47    int		i;
48    char	*cp;
49
50    for (hlong = 0, i = 0, hlong = 0; i < argc; i++)
51	hlong += strlen(argv[i]) + 2;
52
53    if(hlong == 0)
54	return(NULL);
55
56    cp = alloc(hlong);
57    cp[0] = 0;
58    for (i = 0; i < argc; i++) {
59	strcat(cp, argv[i]);
60	if (i < (argc - 1))
61	  strcat(cp, " ");
62    }
63
64    return(cp);
65}
66
67/*
68 * Get the length of a string in kernel space
69 */
70size_t
71strlenout(vaddr_t src)
72{
73    char	c;
74    size_t	len;
75
76    for (len = 0; ; len++) {
77	archsw.arch_copyout(src++, &c, 1);
78	if (c == 0)
79	    break;
80    }
81    return(len);
82}
83
84/*
85 * Make a duplicate copy of a string in kernel space
86 */
87char *
88strdupout(vaddr_t str)
89{
90    char	*result, *cp;
91
92    result = alloc(strlenout(str) + 1);
93    for (cp = result; ;cp++) {
94	archsw.arch_copyout(str++, cp, 1);
95	if (*cp == 0)
96	    break;
97    }
98    return(result);
99}
100
101/* Zero a region in kernel space. */
102void
103kern_bzero(vaddr_t dest, size_t len)
104{
105	char buf[256];
106	size_t chunk, resid;
107
108	memset(buf, 0, sizeof(buf));
109	resid = len;
110	while (resid > 0) {
111		chunk = min(sizeof(buf), resid);
112		archsw.arch_copyin(buf, dest, chunk);
113		resid -= chunk;
114		dest += chunk;
115	}
116}
117
118/*
119 * Read the specified part of a file to kernel space.  Unlike regular
120 * pread, the file pointer is advanced to the end of the read data,
121 * and it just returns 0 if successful.
122 */
123int
124kern_pread(int fd, vaddr_t dest, size_t len, off_t off)
125{
126	ssize_t nread;
127
128	if (lseek(fd, off, SEEK_SET) == -1) {
129		printf("\nlseek failed\n");
130		return (-1);
131	}
132	nread = archsw.arch_readin(fd, dest, len);
133	if (nread != len) {
134		printf("\nreadin failed\n");
135		return (-1);
136	}
137	return (0);
138}
139
140/*
141 * Read the specified part of a file to a malloced buffer.  The file
142 * pointer is advanced to the end of the read data.
143 */
144void *
145alloc_pread(int fd, off_t off, size_t len)
146{
147	void *buf;
148	ssize_t nread;
149
150	buf = alloc(len);
151	if (buf == NULL) {
152		printf("\nalloc(%d) failed\n", (int)len);
153		return (NULL);
154	}
155	if (lseek(fd, off, SEEK_SET) == -1) {
156		printf("\nlseek failed\n");
157		free(buf);
158		return (NULL);
159	}
160	nread = read(fd, buf, len);
161	if (nread != len) {
162		printf("\nread failed\n");
163		free(buf);
164		return (NULL);
165	}
166	return (buf);
167}
168
169#if 0
170/*
171 * Display a region in traditional hexdump format.
172 */
173void
174hexdump(void *region, size_t len)
175{
176    void *	line;
177    int		x, c;
178    char	lbuf[80];
179#define emit(fmt, args...)	{snprintf(lbuf, sizeof(lbuf), fmt , ## args); pager_output(lbuf);}
180
181    pager_open();
182    for (line = region; line < (region + len); line += 16) {
183	emit("%08lx  ", (long) line);
184
185	for (x = 0; x < 16; x++) {
186	    if ((line + x) < (region + len)) {
187		emit("%02x ", *(u_int8_t *)(line + x));
188	    } else {
189		emit("-- ");
190	    }
191	    if (x == 7)
192		emit(" ");
193	}
194	emit(" |");
195	for (x = 0; x < 16; x++) {
196	    if ((line + x) < (region + len)) {
197		c = *(u_int8_t *)(line + x);
198		if ((c < ' ') || (c > '~'))	/* !isprint(c) */
199		    c = '.';
200		emit("%c", c);
201	    } else {
202		emit(" ");
203	    }
204	}
205	emit("|\n");
206    }
207    pager_close();
208}
209#endif
210
211void
212dev_cleanup(void)
213{
214
215}
216