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 * $FreeBSD: src/sys/boot/common/misc.c,v 1.8 2003/08/25 23:30:41 obrien Exp $ 27 * $DragonFly: src/sys/boot/common/misc.c,v 1.3 2003/11/10 06:08:31 dillon Exp $ 28 */ 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 (hlong = 0, i = 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 ((size_t)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 ((size_t)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