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("$FreeBSD$"); 29 30 #include <string.h> 31 #include <stand.h> 32 33 /* 34 * Display a region in traditional hexdump format. 35 */ 36 void 37 hexdump(caddr_t region, size_t len) 38 { 39 caddr_t line; 40 int x, c; 41 #ifdef HEXDUMP_PAGER 42 /* pager causes linking issues for some apps */ 43 #define emit(fmt, args...) {sprintf(lbuf, fmt , ## args); pager_output(lbuf);} 44 char lbuf[80]; 45 46 pager_open(); 47 #else 48 #define emit(fmt, args...) printf(fmt, ## args) 49 #endif 50 51 for (line = region; line < (region + len); line += 16) { 52 emit("%08lx ", (long) line); 53 54 for (x = 0; x < 16; x++) { 55 if ((line + x) < (region + len)) { 56 emit("%02x ", *(uint8_t *)(line + x)); 57 } else { 58 emit("-- "); 59 } 60 if (x == 7) 61 emit(" "); 62 } 63 emit(" |"); 64 for (x = 0; x < 16; x++) { 65 if ((line + x) < (region + len)) { 66 c = *(uint8_t *)(line + x); 67 if ((c < ' ') || (c > '~')) /* !isprint(c) */ 68 c = '.'; 69 emit("%c", c); 70 } else { 71 emit(" "); 72 } 73 } 74 emit("|\n"); 75 } 76 #ifdef HEXDUMP_PAGER 77 pager_close(); 78 #endif 79 } 80