Thomas Gleixner | 21042e4 | 2019-06-04 10:11:34 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 2 | /* |
| 3 | * lib/hexdump.c |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 4 | */ |
| 5 | |
| 6 | #include <linux/types.h> |
| 7 | #include <linux/ctype.h> |
Andy Shevchenko | 9888a58 | 2017-09-08 16:15:28 -0700 | [diff] [blame] | 8 | #include <linux/errno.h> |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 9 | #include <linux/kernel.h> |
Andy Shevchenko | b296a6d | 2020-10-15 20:10:21 -0700 | [diff] [blame] | 10 | #include <linux/minmax.h> |
Paul Gortmaker | 8bc3bcc | 2011-11-16 21:29:17 -0500 | [diff] [blame] | 11 | #include <linux/export.h> |
Horacio Mijail Anton Quiles | 0f70fe6 | 2015-07-17 16:24:04 -0700 | [diff] [blame] | 12 | #include <asm/unaligned.h> |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 13 | |
Harvey Harrison | 3fc9577 | 2008-05-14 16:05:49 -0700 | [diff] [blame] | 14 | const char hex_asc[] = "0123456789abcdef"; |
| 15 | EXPORT_SYMBOL(hex_asc); |
Andre Naujoks | c26d436 | 2013-09-13 19:37:12 +0200 | [diff] [blame] | 16 | const char hex_asc_upper[] = "0123456789ABCDEF"; |
| 17 | EXPORT_SYMBOL(hex_asc_upper); |
Harvey Harrison | 3fc9577 | 2008-05-14 16:05:49 -0700 | [diff] [blame] | 18 | |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 19 | /** |
Andy Shevchenko | 90378889 | 2010-05-24 14:33:23 -0700 | [diff] [blame] | 20 | * hex_to_bin - convert a hex digit to its real value |
| 21 | * @ch: ascii character represents hex digit |
| 22 | * |
| 23 | * hex_to_bin() converts one hex digit to its actual value or -1 in case of bad |
| 24 | * input. |
Mikulas Patocka | e5be157 | 2022-04-25 08:07:48 -0400 | [diff] [blame] | 25 | * |
| 26 | * This function is used to load cryptographic keys, so it is coded in such a |
| 27 | * way that there are no conditions or memory accesses that depend on data. |
| 28 | * |
| 29 | * Explanation of the logic: |
| 30 | * (ch - '9' - 1) is negative if ch <= '9' |
| 31 | * ('0' - 1 - ch) is negative if ch >= '0' |
| 32 | * we "and" these two values, so the result is negative if ch is in the range |
| 33 | * '0' ... '9' |
| 34 | * we are only interested in the sign, so we do a shift ">> 8"; note that right |
| 35 | * shift of a negative value is implementation-defined, so we cast the |
| 36 | * value to (unsigned) before the shift --- we have 0xffffff if ch is in |
| 37 | * the range '0' ... '9', 0 otherwise |
| 38 | * we "and" this value with (ch - '0' + 1) --- we have a value 1 ... 10 if ch is |
| 39 | * in the range '0' ... '9', 0 otherwise |
| 40 | * we add this value to -1 --- we have a value 0 ... 9 if ch is in the range '0' |
| 41 | * ... '9', -1 otherwise |
| 42 | * the next line is similar to the previous one, but we need to decode both |
| 43 | * uppercase and lowercase letters, so we use (ch & 0xdf), which converts |
| 44 | * lowercase to uppercase |
Andy Shevchenko | 90378889 | 2010-05-24 14:33:23 -0700 | [diff] [blame] | 45 | */ |
Mikulas Patocka | e5be157 | 2022-04-25 08:07:48 -0400 | [diff] [blame] | 46 | int hex_to_bin(unsigned char ch) |
Andy Shevchenko | 90378889 | 2010-05-24 14:33:23 -0700 | [diff] [blame] | 47 | { |
Mikulas Patocka | e5be157 | 2022-04-25 08:07:48 -0400 | [diff] [blame] | 48 | unsigned char cu = ch & 0xdf; |
| 49 | return -1 + |
| 50 | ((ch - '0' + 1) & (unsigned)((ch - '9' - 1) & ('0' - 1 - ch)) >> 8) + |
| 51 | ((cu - 'A' + 11) & (unsigned)((cu - 'F' - 1) & ('A' - 1 - cu)) >> 8); |
Andy Shevchenko | 90378889 | 2010-05-24 14:33:23 -0700 | [diff] [blame] | 52 | } |
| 53 | EXPORT_SYMBOL(hex_to_bin); |
| 54 | |
| 55 | /** |
Mimi Zohar | dc88e46 | 2010-11-23 17:50:31 -0500 | [diff] [blame] | 56 | * hex2bin - convert an ascii hexadecimal string to its binary representation |
| 57 | * @dst: binary result |
| 58 | * @src: ascii hexadecimal string |
| 59 | * @count: result length |
Mimi Zohar | b780498 | 2011-09-20 11:23:49 -0400 | [diff] [blame] | 60 | * |
Andy Shevchenko | 9888a58 | 2017-09-08 16:15:28 -0700 | [diff] [blame] | 61 | * Return 0 on success, -EINVAL in case of bad input. |
Mimi Zohar | dc88e46 | 2010-11-23 17:50:31 -0500 | [diff] [blame] | 62 | */ |
Mimi Zohar | b780498 | 2011-09-20 11:23:49 -0400 | [diff] [blame] | 63 | int hex2bin(u8 *dst, const char *src, size_t count) |
Mimi Zohar | dc88e46 | 2010-11-23 17:50:31 -0500 | [diff] [blame] | 64 | { |
| 65 | while (count--) { |
Mikulas Patocka | e4d8a29 | 2022-04-27 11:26:40 -0400 | [diff] [blame] | 66 | int hi, lo; |
Mimi Zohar | b780498 | 2011-09-20 11:23:49 -0400 | [diff] [blame] | 67 | |
Mikulas Patocka | e4d8a29 | 2022-04-27 11:26:40 -0400 | [diff] [blame] | 68 | hi = hex_to_bin(*src++); |
| 69 | if (unlikely(hi < 0)) |
| 70 | return -EINVAL; |
| 71 | lo = hex_to_bin(*src++); |
| 72 | if (unlikely(lo < 0)) |
Andy Shevchenko | 9888a58 | 2017-09-08 16:15:28 -0700 | [diff] [blame] | 73 | return -EINVAL; |
Mimi Zohar | b780498 | 2011-09-20 11:23:49 -0400 | [diff] [blame] | 74 | |
| 75 | *dst++ = (hi << 4) | lo; |
Mimi Zohar | dc88e46 | 2010-11-23 17:50:31 -0500 | [diff] [blame] | 76 | } |
Mimi Zohar | b780498 | 2011-09-20 11:23:49 -0400 | [diff] [blame] | 77 | return 0; |
Mimi Zohar | dc88e46 | 2010-11-23 17:50:31 -0500 | [diff] [blame] | 78 | } |
| 79 | EXPORT_SYMBOL(hex2bin); |
| 80 | |
| 81 | /** |
David Howells | 53d91c5 | 2014-09-16 17:36:01 +0100 | [diff] [blame] | 82 | * bin2hex - convert binary data to an ascii hexadecimal string |
| 83 | * @dst: ascii hexadecimal result |
| 84 | * @src: binary data |
| 85 | * @count: binary data length |
| 86 | */ |
| 87 | char *bin2hex(char *dst, const void *src, size_t count) |
| 88 | { |
| 89 | const unsigned char *_src = src; |
| 90 | |
| 91 | while (count--) |
| 92 | dst = hex_byte_pack(dst, *_src++); |
| 93 | return dst; |
| 94 | } |
| 95 | EXPORT_SYMBOL(bin2hex); |
| 96 | |
| 97 | /** |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 98 | * hex_dump_to_buffer - convert a blob of data to "hex ASCII" in memory |
| 99 | * @buf: data blob to dump |
| 100 | * @len: number of bytes in the @buf |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 101 | * @rowsize: number of bytes to print per line; must be 16 or 32 |
| 102 | * @groupsize: number of bytes to print at a time (1, 2, 4, 8; default = 1) |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 103 | * @linebuf: where to put the converted data |
| 104 | * @linebuflen: total size of @linebuf, including space for terminating NUL |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 105 | * @ascii: include ASCII after the hex output |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 106 | * |
| 107 | * hex_dump_to_buffer() works on one "line" of output at a time, i.e., |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 108 | * 16 or 32 bytes of input data converted to hex + ASCII output. |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 109 | * |
| 110 | * Given a buffer of u8 data, hex_dump_to_buffer() converts the input data |
| 111 | * to a hex + ASCII dump at the supplied memory location. |
| 112 | * The converted output is always NUL-terminated. |
| 113 | * |
| 114 | * E.g.: |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 115 | * hex_dump_to_buffer(frame->data, frame->len, 16, 1, |
Joe Perches | db0fd97 | 2010-05-24 14:33:22 -0700 | [diff] [blame] | 116 | * linebuf, sizeof(linebuf), true); |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 117 | * |
| 118 | * example output buffer: |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 119 | * 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f @ABCDEFGHIJKLMNO |
Andy Shevchenko | 114fc1a | 2015-02-12 15:02:29 -0800 | [diff] [blame] | 120 | * |
| 121 | * Return: |
| 122 | * The amount of bytes placed in the buffer without terminating NUL. If the |
| 123 | * output was truncated, then the return value is the number of bytes |
| 124 | * (excluding the terminating NUL) which would have been written to the final |
| 125 | * string if enough space had been available. |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 126 | */ |
Andy Shevchenko | 114fc1a | 2015-02-12 15:02:29 -0800 | [diff] [blame] | 127 | int hex_dump_to_buffer(const void *buf, size_t len, int rowsize, int groupsize, |
| 128 | char *linebuf, size_t linebuflen, bool ascii) |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 129 | { |
| 130 | const u8 *ptr = buf; |
Andy Shevchenko | 5d909c8 | 2015-02-12 15:02:26 -0800 | [diff] [blame] | 131 | int ngroups; |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 132 | u8 ch; |
| 133 | int j, lx = 0; |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 134 | int ascii_column; |
Andy Shevchenko | 114fc1a | 2015-02-12 15:02:29 -0800 | [diff] [blame] | 135 | int ret; |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 136 | |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 137 | if (rowsize != 16 && rowsize != 32) |
| 138 | rowsize = 16; |
| 139 | |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 140 | if (len > rowsize) /* limit to one line at a time */ |
| 141 | len = rowsize; |
Andy Shevchenko | 5d909c8 | 2015-02-12 15:02:26 -0800 | [diff] [blame] | 142 | if (!is_power_of_2(groupsize) || groupsize > 8) |
| 143 | groupsize = 1; |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 144 | if ((len % groupsize) != 0) /* no mixed size output */ |
| 145 | groupsize = 1; |
| 146 | |
Andy Shevchenko | 5d909c8 | 2015-02-12 15:02:26 -0800 | [diff] [blame] | 147 | ngroups = len / groupsize; |
| 148 | ascii_column = rowsize * 2 + rowsize / groupsize + 1; |
Andy Shevchenko | 114fc1a | 2015-02-12 15:02:29 -0800 | [diff] [blame] | 149 | |
| 150 | if (!linebuflen) |
| 151 | goto overflow1; |
| 152 | |
| 153 | if (!len) |
| 154 | goto nil; |
| 155 | |
Andy Shevchenko | 5d909c8 | 2015-02-12 15:02:26 -0800 | [diff] [blame] | 156 | if (groupsize == 8) { |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 157 | const u64 *ptr8 = buf; |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 158 | |
Andy Shevchenko | 114fc1a | 2015-02-12 15:02:29 -0800 | [diff] [blame] | 159 | for (j = 0; j < ngroups; j++) { |
| 160 | ret = snprintf(linebuf + lx, linebuflen - lx, |
| 161 | "%s%16.16llx", j ? " " : "", |
Horacio Mijail Anton Quiles | 0f70fe6 | 2015-07-17 16:24:04 -0700 | [diff] [blame] | 162 | get_unaligned(ptr8 + j)); |
Andy Shevchenko | 114fc1a | 2015-02-12 15:02:29 -0800 | [diff] [blame] | 163 | if (ret >= linebuflen - lx) |
| 164 | goto overflow1; |
| 165 | lx += ret; |
| 166 | } |
Andy Shevchenko | 5d909c8 | 2015-02-12 15:02:26 -0800 | [diff] [blame] | 167 | } else if (groupsize == 4) { |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 168 | const u32 *ptr4 = buf; |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 169 | |
Andy Shevchenko | 114fc1a | 2015-02-12 15:02:29 -0800 | [diff] [blame] | 170 | for (j = 0; j < ngroups; j++) { |
| 171 | ret = snprintf(linebuf + lx, linebuflen - lx, |
| 172 | "%s%8.8x", j ? " " : "", |
Horacio Mijail Anton Quiles | 0f70fe6 | 2015-07-17 16:24:04 -0700 | [diff] [blame] | 173 | get_unaligned(ptr4 + j)); |
Andy Shevchenko | 114fc1a | 2015-02-12 15:02:29 -0800 | [diff] [blame] | 174 | if (ret >= linebuflen - lx) |
| 175 | goto overflow1; |
| 176 | lx += ret; |
| 177 | } |
Andy Shevchenko | 5d909c8 | 2015-02-12 15:02:26 -0800 | [diff] [blame] | 178 | } else if (groupsize == 2) { |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 179 | const u16 *ptr2 = buf; |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 180 | |
Andy Shevchenko | 114fc1a | 2015-02-12 15:02:29 -0800 | [diff] [blame] | 181 | for (j = 0; j < ngroups; j++) { |
| 182 | ret = snprintf(linebuf + lx, linebuflen - lx, |
| 183 | "%s%4.4x", j ? " " : "", |
Horacio Mijail Anton Quiles | 0f70fe6 | 2015-07-17 16:24:04 -0700 | [diff] [blame] | 184 | get_unaligned(ptr2 + j)); |
Andy Shevchenko | 114fc1a | 2015-02-12 15:02:29 -0800 | [diff] [blame] | 185 | if (ret >= linebuflen - lx) |
| 186 | goto overflow1; |
| 187 | lx += ret; |
| 188 | } |
Andy Shevchenko | 5d909c8 | 2015-02-12 15:02:26 -0800 | [diff] [blame] | 189 | } else { |
Andy Shevchenko | 114fc1a | 2015-02-12 15:02:29 -0800 | [diff] [blame] | 190 | for (j = 0; j < len; j++) { |
Andy Shevchenko | 9f029f5 | 2015-11-06 16:31:31 -0800 | [diff] [blame] | 191 | if (linebuflen < lx + 2) |
Andy Shevchenko | 114fc1a | 2015-02-12 15:02:29 -0800 | [diff] [blame] | 192 | goto overflow2; |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 193 | ch = ptr[j]; |
Harvey Harrison | 3fc9577 | 2008-05-14 16:05:49 -0700 | [diff] [blame] | 194 | linebuf[lx++] = hex_asc_hi(ch); |
Andy Shevchenko | 9f029f5 | 2015-11-06 16:31:31 -0800 | [diff] [blame] | 195 | if (linebuflen < lx + 2) |
| 196 | goto overflow2; |
Harvey Harrison | 3fc9577 | 2008-05-14 16:05:49 -0700 | [diff] [blame] | 197 | linebuf[lx++] = hex_asc_lo(ch); |
Andy Shevchenko | 9f029f5 | 2015-11-06 16:31:31 -0800 | [diff] [blame] | 198 | if (linebuflen < lx + 2) |
| 199 | goto overflow2; |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 200 | linebuf[lx++] = ' '; |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 201 | } |
Li Zefan | c67ae69 | 2009-06-16 15:33:45 -0700 | [diff] [blame] | 202 | if (j) |
| 203 | lx--; |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 204 | } |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 205 | if (!ascii) |
| 206 | goto nil; |
| 207 | |
Andy Shevchenko | 114fc1a | 2015-02-12 15:02:29 -0800 | [diff] [blame] | 208 | while (lx < ascii_column) { |
| 209 | if (linebuflen < lx + 2) |
| 210 | goto overflow2; |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 211 | linebuf[lx++] = ' '; |
Andy Shevchenko | 114fc1a | 2015-02-12 15:02:29 -0800 | [diff] [blame] | 212 | } |
| 213 | for (j = 0; j < len; j++) { |
| 214 | if (linebuflen < lx + 2) |
| 215 | goto overflow2; |
Joe Perches | db0fd97 | 2010-05-24 14:33:22 -0700 | [diff] [blame] | 216 | ch = ptr[j]; |
| 217 | linebuf[lx++] = (isascii(ch) && isprint(ch)) ? ch : '.'; |
| 218 | } |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 219 | nil: |
Andy Shevchenko | 114fc1a | 2015-02-12 15:02:29 -0800 | [diff] [blame] | 220 | linebuf[lx] = '\0'; |
| 221 | return lx; |
| 222 | overflow2: |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 223 | linebuf[lx++] = '\0'; |
Andy Shevchenko | 114fc1a | 2015-02-12 15:02:29 -0800 | [diff] [blame] | 224 | overflow1: |
| 225 | return ascii ? ascii_column + len : (groupsize * 2 + 1) * ngroups - 1; |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 226 | } |
| 227 | EXPORT_SYMBOL(hex_dump_to_buffer); |
| 228 | |
Joe Perches | ac83ed6 | 2011-01-12 16:59:47 -0800 | [diff] [blame] | 229 | #ifdef CONFIG_PRINTK |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 230 | /** |
| 231 | * print_hex_dump - print a text hex dump to syslog for a binary blob of data |
| 232 | * @level: kernel log level (e.g. KERN_DEBUG) |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 233 | * @prefix_str: string to prefix each line with; |
| 234 | * caller supplies trailing spaces for alignment if desired |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 235 | * @prefix_type: controls whether prefix of an offset, address, or none |
| 236 | * is printed (%DUMP_PREFIX_OFFSET, %DUMP_PREFIX_ADDRESS, %DUMP_PREFIX_NONE) |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 237 | * @rowsize: number of bytes to print per line; must be 16 or 32 |
| 238 | * @groupsize: number of bytes to print at a time (1, 2, 4, 8; default = 1) |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 239 | * @buf: data blob to dump |
| 240 | * @len: number of bytes in the @buf |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 241 | * @ascii: include ASCII after the hex output |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 242 | * |
| 243 | * Given a buffer of u8 data, print_hex_dump() prints a hex + ASCII dump |
| 244 | * to the kernel log at the specified kernel log level, with an optional |
| 245 | * leading prefix. |
| 246 | * |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 247 | * print_hex_dump() works on one "line" of output at a time, i.e., |
| 248 | * 16 or 32 bytes of input data converted to hex + ASCII output. |
| 249 | * print_hex_dump() iterates over the entire input @buf, breaking it into |
| 250 | * "line size" chunks to format and print. |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 251 | * |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 252 | * E.g.: |
| 253 | * print_hex_dump(KERN_DEBUG, "raw data: ", DUMP_PREFIX_ADDRESS, |
Joe Perches | db0fd97 | 2010-05-24 14:33:22 -0700 | [diff] [blame] | 254 | * 16, 1, frame->data, frame->len, true); |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 255 | * |
| 256 | * Example output using %DUMP_PREFIX_OFFSET and 1-byte mode: |
| 257 | * 0009ab42: 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f @ABCDEFGHIJKLMNO |
| 258 | * Example output using %DUMP_PREFIX_ADDRESS and 4-byte mode: |
| 259 | * ffffffff88089af0: 73727170 77767574 7b7a7978 7f7e7d7c pqrstuvwxyz{|}~. |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 260 | */ |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 261 | void print_hex_dump(const char *level, const char *prefix_str, int prefix_type, |
Joe Perches | db0fd97 | 2010-05-24 14:33:22 -0700 | [diff] [blame] | 262 | int rowsize, int groupsize, |
| 263 | const void *buf, size_t len, bool ascii) |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 264 | { |
Artem Bityutskiy | 6a0ed91 | 2007-08-07 23:43:14 +0300 | [diff] [blame] | 265 | const u8 *ptr = buf; |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 266 | int i, linelen, remaining = len; |
Joe Perches | db0fd97 | 2010-05-24 14:33:22 -0700 | [diff] [blame] | 267 | unsigned char linebuf[32 * 3 + 2 + 32 + 1]; |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 268 | |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 269 | if (rowsize != 16 && rowsize != 32) |
| 270 | rowsize = 16; |
| 271 | |
| 272 | for (i = 0; i < len; i += rowsize) { |
| 273 | linelen = min(remaining, rowsize); |
| 274 | remaining -= rowsize; |
Joe Perches | db0fd97 | 2010-05-24 14:33:22 -0700 | [diff] [blame] | 275 | |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 276 | hex_dump_to_buffer(ptr + i, linelen, rowsize, groupsize, |
Joe Perches | db0fd97 | 2010-05-24 14:33:22 -0700 | [diff] [blame] | 277 | linebuf, sizeof(linebuf), ascii); |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 278 | |
| 279 | switch (prefix_type) { |
| 280 | case DUMP_PREFIX_ADDRESS: |
Joe Perches | db0fd97 | 2010-05-24 14:33:22 -0700 | [diff] [blame] | 281 | printk("%s%s%p: %s\n", |
| 282 | level, prefix_str, ptr + i, linebuf); |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 283 | break; |
| 284 | case DUMP_PREFIX_OFFSET: |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 285 | printk("%s%s%.8x: %s\n", level, prefix_str, i, linebuf); |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 286 | break; |
| 287 | default: |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 288 | printk("%s%s%s\n", level, prefix_str, linebuf); |
Randy Dunlap | 99eaf3c | 2007-05-10 22:22:39 -0700 | [diff] [blame] | 289 | break; |
| 290 | } |
| 291 | } |
| 292 | } |
| 293 | EXPORT_SYMBOL(print_hex_dump); |
Randy Dunlap | c790923 | 2007-06-08 13:47:04 -0700 | [diff] [blame] | 294 | |
Vladimir Kondratiev | 7a55561 | 2012-12-05 16:48:27 -0500 | [diff] [blame] | 295 | #endif /* defined(CONFIG_PRINTK) */ |