diff options
Diffstat (limited to 'lib/hexdump.c')
| -rw-r--r-- | lib/hexdump.c | 54 |
1 files changed, 37 insertions, 17 deletions
diff --git a/lib/hexdump.c b/lib/hexdump.c index 39af2560f765..5d7a4802c562 100644 --- a/lib/hexdump.c +++ b/lib/hexdump.c @@ -16,6 +16,24 @@ const char hex_asc[] = "0123456789abcdef"; EXPORT_SYMBOL(hex_asc); /** + * hex_to_bin - convert a hex digit to its real value + * @ch: ascii character represents hex digit + * + * hex_to_bin() converts one hex digit to its actual value or -1 in case of bad + * input. + */ +int hex_to_bin(char ch) +{ + if ((ch >= '0') && (ch <= '9')) + return ch - '0'; + ch = tolower(ch); + if ((ch >= 'a') && (ch <= 'f')) + return ch - 'a' + 10; + return -1; +} +EXPORT_SYMBOL(hex_to_bin); + +/** * hex_dump_to_buffer - convert a blob of data to "hex ASCII" in memory * @buf: data blob to dump * @len: number of bytes in the @buf @@ -34,7 +52,7 @@ EXPORT_SYMBOL(hex_asc); * * E.g.: * hex_dump_to_buffer(frame->data, frame->len, 16, 1, - * linebuf, sizeof(linebuf), 1); + * linebuf, sizeof(linebuf), true); * * example output buffer: * 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f @ABCDEFGHIJKLMNO @@ -65,8 +83,8 @@ void hex_dump_to_buffer(const void *buf, size_t len, int rowsize, for (j = 0; j < ngroups; j++) lx += scnprintf(linebuf + lx, linebuflen - lx, - "%s%16.16llx", j ? " " : "", - (unsigned long long)*(ptr8 + j)); + "%s%16.16llx", j ? " " : "", + (unsigned long long)*(ptr8 + j)); ascii_column = 17 * ngroups + 2; break; } @@ -77,7 +95,7 @@ void hex_dump_to_buffer(const void *buf, size_t len, int rowsize, for (j = 0; j < ngroups; j++) lx += scnprintf(linebuf + lx, linebuflen - lx, - "%s%8.8x", j ? " " : "", *(ptr4 + j)); + "%s%8.8x", j ? " " : "", *(ptr4 + j)); ascii_column = 9 * ngroups + 2; break; } @@ -88,7 +106,7 @@ void hex_dump_to_buffer(const void *buf, size_t len, int rowsize, for (j = 0; j < ngroups; j++) lx += scnprintf(linebuf + lx, linebuflen - lx, - "%s%4.4x", j ? " " : "", *(ptr2 + j)); + "%s%4.4x", j ? " " : "", *(ptr2 + j)); ascii_column = 5 * ngroups + 2; break; } @@ -111,9 +129,10 @@ void hex_dump_to_buffer(const void *buf, size_t len, int rowsize, while (lx < (linebuflen - 1) && lx < (ascii_column - 1)) linebuf[lx++] = ' '; - for (j = 0; (j < len) && (lx + 2) < linebuflen; j++) - linebuf[lx++] = (isascii(ptr[j]) && isprint(ptr[j])) ? ptr[j] - : '.'; + for (j = 0; (j < len) && (lx + 2) < linebuflen; j++) { + ch = ptr[j]; + linebuf[lx++] = (isascii(ch) && isprint(ch)) ? ch : '.'; + } nil: linebuf[lx++] = '\0'; } @@ -143,7 +162,7 @@ EXPORT_SYMBOL(hex_dump_to_buffer); * * E.g.: * print_hex_dump(KERN_DEBUG, "raw data: ", DUMP_PREFIX_ADDRESS, - * 16, 1, frame->data, frame->len, 1); + * 16, 1, frame->data, frame->len, true); * * Example output using %DUMP_PREFIX_OFFSET and 1-byte mode: * 0009ab42: 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f @ABCDEFGHIJKLMNO @@ -151,12 +170,12 @@ EXPORT_SYMBOL(hex_dump_to_buffer); * ffffffff88089af0: 73727170 77767574 7b7a7978 7f7e7d7c pqrstuvwxyz{|}~. */ void print_hex_dump(const char *level, const char *prefix_str, int prefix_type, - int rowsize, int groupsize, - const void *buf, size_t len, bool ascii) + int rowsize, int groupsize, + const void *buf, size_t len, bool ascii) { const u8 *ptr = buf; int i, linelen, remaining = len; - unsigned char linebuf[200]; + unsigned char linebuf[32 * 3 + 2 + 32 + 1]; if (rowsize != 16 && rowsize != 32) rowsize = 16; @@ -164,13 +183,14 @@ void print_hex_dump(const char *level, const char *prefix_str, int prefix_type, for (i = 0; i < len; i += rowsize) { linelen = min(remaining, rowsize); remaining -= rowsize; + hex_dump_to_buffer(ptr + i, linelen, rowsize, groupsize, - linebuf, sizeof(linebuf), ascii); + linebuf, sizeof(linebuf), ascii); switch (prefix_type) { case DUMP_PREFIX_ADDRESS: - printk("%s%s%*p: %s\n", level, prefix_str, - (int)(2 * sizeof(void *)), ptr + i, linebuf); + printk("%s%s%p: %s\n", + level, prefix_str, ptr + i, linebuf); break; case DUMP_PREFIX_OFFSET: printk("%s%s%.8x: %s\n", level, prefix_str, i, linebuf); @@ -196,9 +216,9 @@ EXPORT_SYMBOL(print_hex_dump); * rowsize of 16, groupsize of 1, and ASCII output included. */ void print_hex_dump_bytes(const char *prefix_str, int prefix_type, - const void *buf, size_t len) + const void *buf, size_t len) { print_hex_dump(KERN_DEBUG, prefix_str, prefix_type, 16, 1, - buf, len, 1); + buf, len, true); } EXPORT_SYMBOL(print_hex_dump_bytes); |
