FreeBSD/Linux Kernel Cross Reference
sys/boot/common/misc.c
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 __FBSDID("$FreeBSD: src/sys/boot/common/misc.c,v 1.10 2008/08/04 06:39:52 cperciva Exp $");
29
30 #include <string.h>
31 #include <stand.h>
32 #include <bootstrap.h>
33
34 /*
35 * Concatenate the (argc) elements of (argv) into a single string, and return
36 * a copy of same.
37 */
38 char *
39 unargv(int argc, char *argv[])
40 {
41 size_t hlong;
42 int i;
43 char *cp;
44
45 for (i = 0, hlong = 0; i < argc; i++)
46 hlong += strlen(argv[i]) + 2;
47
48 if(hlong == 0)
49 return(NULL);
50
51 cp = malloc(hlong);
52 cp[0] = 0;
53 for (i = 0; i < argc; i++) {
54 strcat(cp, argv[i]);
55 if (i < (argc - 1))
56 strcat(cp, " ");
57 }
58
59 return(cp);
60 }
61
62 /*
63 * Get the length of a string in kernel space
64 */
65 size_t
66 strlenout(vm_offset_t src)
67 {
68 char c;
69 size_t len;
70
71 for (len = 0; ; len++) {
72 archsw.arch_copyout(src++, &c, 1);
73 if (c == 0)
74 break;
75 }
76 return(len);
77 }
78
79 /*
80 * Make a duplicate copy of a string in kernel space
81 */
82 char *
83 strdupout(vm_offset_t str)
84 {
85 char *result, *cp;
86
87 result = malloc(strlenout(str) + 1);
88 for (cp = result; ;cp++) {
89 archsw.arch_copyout(str++, cp, 1);
90 if (*cp == 0)
91 break;
92 }
93 return(result);
94 }
95
96 /* Zero a region in kernel space. */
97 void
98 kern_bzero(vm_offset_t dest, size_t len)
99 {
100 char buf[256];
101 size_t chunk, resid;
102
103 bzero(buf, sizeof(buf));
104 resid = len;
105 while (resid > 0) {
106 chunk = min(sizeof(buf), resid);
107 archsw.arch_copyin(buf, dest, chunk);
108 resid -= chunk;
109 dest += chunk;
110 }
111 }
112
113 /*
114 * Read the specified part of a file to kernel space. Unlike regular
115 * pread, the file pointer is advanced to the end of the read data,
116 * and it just returns 0 if successful.
117 */
118 int
119 kern_pread(int fd, vm_offset_t dest, size_t len, off_t off)
120 {
121 ssize_t nread;
122
123 if (lseek(fd, off, SEEK_SET) == -1) {
124 printf("\nlseek failed\n");
125 return (-1);
126 }
127 nread = archsw.arch_readin(fd, dest, len);
128 if (nread != len) {
129 printf("\nreadin failed\n");
130 return (-1);
131 }
132 return (0);
133 }
134
135 /*
136 * Read the specified part of a file to a malloced buffer. The file
137 * pointer is advanced to the end of the read data.
138 */
139 void *
140 alloc_pread(int fd, off_t off, size_t len)
141 {
142 void *buf;
143 ssize_t nread;
144
145 buf = malloc(len);
146 if (buf == NULL) {
147 printf("\nmalloc(%d) failed\n", (int)len);
148 return (NULL);
149 }
150 if (lseek(fd, off, SEEK_SET) == -1) {
151 printf("\nlseek failed\n");
152 free(buf);
153 return (NULL);
154 }
155 nread = read(fd, buf, len);
156 if (nread != len) {
157 printf("\nread failed\n");
158 free(buf);
159 return (NULL);
160 }
161 return (buf);
162 }
163
164 /*
165 * Display a region in traditional hexdump format.
166 */
167 void
168 hexdump(caddr_t region, size_t len)
169 {
170 caddr_t line;
171 int x, c;
172 char lbuf[80];
173 #define emit(fmt, args...) {sprintf(lbuf, fmt , ## args); pager_output(lbuf);}
174
175 pager_open();
176 for (line = region; line < (region + len); line += 16) {
177 emit("%08lx ", (long) line);
178
179 for (x = 0; x < 16; x++) {
180 if ((line + x) < (region + len)) {
181 emit("%02x ", *(u_int8_t *)(line + x));
182 } else {
183 emit("-- ");
184 }
185 if (x == 7)
186 emit(" ");
187 }
188 emit(" |");
189 for (x = 0; x < 16; x++) {
190 if ((line + x) < (region + len)) {
191 c = *(u_int8_t *)(line + x);
192 if ((c < ' ') || (c > '~')) /* !isprint(c) */
193 c = '.';
194 emit("%c", c);
195 } else {
196 emit(" ");
197 }
198 }
199 emit("|\n");
200 }
201 pager_close();
202 }
203
204 void
205 dev_cleanup(void)
206 {
207 int i;
208
209 /* Call cleanup routines */
210 for (i = 0; devsw[i] != NULL; ++i)
211 if (devsw[i]->dv_cleanup != NULL)
212 (devsw[i]->dv_cleanup)();
213 }
214 Cache object: 8604fbe7803c83e3df744e063771bd8d
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