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 <string.h> 28 #include <stand.h> 29 30 /* 31 * Display a region in traditional hexdump format. 32 */ 33 void 34 hexdump(caddr_t region, size_t len) 35 { 36 caddr_t line; 37 int x, c; 38 #ifdef HEXDUMP_PAGER 39 /* pager causes linking issues for some apps */ 40 #define emit(fmt, args...) {sprintf(lbuf, fmt , ## args); pager_output(lbuf);} 41 char lbuf[80]; 42 43 pager_open(); 44 #else 45 #define emit(fmt, args...) printf(fmt, ## args) 46 #endif 47 48 for (line = region; line < (region + len); line += 16) { 49 emit("%08lx ", (long) line); 50 51 for (x = 0; x < 16; x++) { 52 if ((line + x) < (region + len)) { 53 emit("%02x ", *(uint8_t *)(line + x)); 54 } else { 55 emit("-- "); 56 } 57 if (x == 7) 58 emit(" "); 59 } 60 emit(" |"); 61 for (x = 0; x < 16; x++) { 62 if ((line + x) < (region + len)) { 63 c = *(uint8_t *)(line + x); 64 if ((c < ' ') || (c > '~')) /* !isprint(c) */ 65 c = '.'; 66 emit("%c", c); 67 } else { 68 emit(" "); 69 } 70 } 71 emit("|\n"); 72 } 73 #ifdef HEXDUMP_PAGER 74 pager_close(); 75 #endif 76 } 77