From f8c987f8f127f867d96ca74bcd1fcb11d8265b67 Mon Sep 17 00:00:00 2001 From: Alexey Brodkin Date: Tue, 5 Jun 2018 17:17:57 +0300 Subject: lib: Add hexdump Often during debugging session it's very interesting to see what data we were dealing with. For example what we write or read to/from memory or peripherals. This change introduces functions that allow to dump binary data with one simple function invocation like: ------------------->8---------------- print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, buf, len); ------------------->8---------------- which gives us the following: ------------------->8---------------- 00000000: f2 b7 c9 88 62 61 75 64 72 61 74 65 3d 31 31 35 ....baudrate=115 00000010: 32 30 30 00 62 6f 6f 74 61 72 67 73 3d 63 6f 6e 200.bootargs=con 00000020: 73 6f 6c 65 3d 74 74 79 53 33 2c 31 31 35 32 30 sole=ttyS3,11520 00000030: 30 6e 38 00 62 6f 6f 74 64 65 6c 61 79 3d 33 00 0n8.bootdelay=3. 00000040: 62 6f 6f 74 66 69 6c 65 3d 75 49 6d 61 67 65 00 bootfile=uImage. 00000050: 66 64 74 63 6f 6e 74 72 6f 6c 61 64 64 72 3d 39 fdtcontroladdr=9 00000060: 66 66 62 31 62 61 30 00 6c 6f 61 64 61 64 64 72 ffb1ba0.loadaddr 00000070: 3d 30 78 38 32 30 30 30 30 30 30 00 73 74 64 65 =0x82000000.stde 00000080: 72 72 3d 73 65 72 69 61 6c 30 40 65 30 30 32 32 rr=serial0@e0022 00000090: 30 30 30 00 73 74 64 69 6e 3d 73 65 72 69 61 6c 000.stdin=serial 000000a0: 30 40 65 30 30 32 32 30 30 30 00 73 74 64 6f 75 0@e0022000.stdou 000000b0: 74 3d 73 65 72 69 61 6c 30 40 65 30 30 32 32 30 t=serial0@e00220 000000c0: 30 30 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00.............. ... ------------------->8---------------- Source of hexdump.c was copied from Linux kernel v4.7-rc2. Signed-off-by: Alexey Brodkin Cc: Anatolij Gustschin Cc: Mario Six Cc: Simon Glass Cc: Tom Rini Cc: Stefan Roese --- include/hexdump.h | 91 ++++++++++++++++++++++++++++++++++++++++++++++++++ include/linux/compat.h | 1 - 2 files changed, 91 insertions(+), 1 deletion(-) create mode 100644 include/hexdump.h (limited to 'include') diff --git a/include/hexdump.h b/include/hexdump.h new file mode 100644 index 00000000000..f7b76ff7121 --- /dev/null +++ b/include/hexdump.h @@ -0,0 +1,91 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (C) 2018 Synopsys, Inc. All rights reserved. + * + */ + +#ifndef HEXDUMP_H +#define HEXDUMP_H + +#include +#include + +enum { + DUMP_PREFIX_NONE, + DUMP_PREFIX_ADDRESS, + DUMP_PREFIX_OFFSET +}; + +extern const char hex_asc[]; +#define hex_asc_lo(x) hex_asc[((x) & 0x0f)] +#define hex_asc_hi(x) hex_asc[((x) & 0xf0) >> 4] + +static inline char *hex_byte_pack(char *buf, u8 byte) +{ + *buf++ = hex_asc_hi(byte); + *buf++ = hex_asc_lo(byte); + return buf; +} + +/** + * 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. + */ +static inline 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; +} + +/** + * hex2bin - convert an ascii hexadecimal string to its binary representation + * @dst: binary result + * @src: ascii hexadecimal string + * @count: result length + * + * Return 0 on success, -1 in case of bad input. + */ +static inline int hex2bin(u8 *dst, const char *src, size_t count) +{ + while (count--) { + int hi = hex_to_bin(*src++); + int lo = hex_to_bin(*src++); + + if ((hi < 0) || (lo < 0)) + return -1; + + *dst++ = (hi << 4) | lo; + } + return 0; +} + +/** + * bin2hex - convert binary data to an ascii hexadecimal string + * @dst: ascii hexadecimal result + * @src: binary data + * @count: binary data length + */ +static inline char *bin2hex(char *dst, const void *src, size_t count) +{ + const unsigned char *_src = src; + + while (count--) + dst = hex_byte_pack(dst, *_src++); + return dst; +} + +int hex_dump_to_buffer(const void *buf, size_t len, int rowsize, int groupsize, + char *linebuf, size_t linebuflen, bool ascii); +void print_hex_dump(const char *prefix_str, int prefix_type, int rowsize, + int groupsize, const void *buf, size_t len, bool ascii); +void print_hex_dump_bytes(const char *prefix_str, int prefix_type, + const void *buf, size_t len); + +#endif /* HEXDUMP_H */ diff --git a/include/linux/compat.h b/include/linux/compat.h index 8711fe2b48c..6e3feb64d2d 100644 --- a/include/linux/compat.h +++ b/include/linux/compat.h @@ -193,7 +193,6 @@ typedef unsigned long blkcnt_t; #define init_waitqueue_head(...) do { } while (0) #define wait_event_interruptible(...) 0 #define wake_up_interruptible(...) do { } while (0) -#define print_hex_dump(...) do { } while (0) #define dump_stack(...) do { } while (0) #define task_pid_nr(x) 0 -- cgit v1.3.1