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hexdump: Support any rowsize

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At present print_hex_dump() only supports either 16- or 32-byte lines.
With U-Boot we want to support any line length up to a maximum of 64.
Update the function to support this, with 0 defaulting to 16, as with
print_buffer().

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2021-05-08 07:00:03 -06:00 committed by Tom Rini
parent 19edf139e9
commit 5d6d2b8838
3 changed files with 31 additions and 8 deletions
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4
include/hexdump.h
View File

@ -85,7 +85,7 @@ static inline char *bin2hex(char *dst, const void *src, size_t count)
* 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
* @rowsize: number of bytes to print per line; must be 16 or 32
* @rowsize: number of bytes to print per line; max 64
* @groupsize: number of bytes to print at a time (1, 2, 4, 8; default = 1)
* @linebuf: where to put the converted data
* @linebuflen: total size of @linebuf, including space for terminating NUL
@ -120,7 +120,7 @@ int hex_dump_to_buffer(const void *buf, size_t len, int rowsize, int groupsize,
* caller supplies trailing spaces for alignment if desired
* @prefix_type: controls whether prefix of an offset, address, or none
* is printed (see enum dump_prefix_t)
* @rowsize: number of bytes to print per line; must be 16 or 32
* @rowsize: number of bytes to print per line; max 64
* @groupsize: number of bytes to print at a time (1, 2, 4, 8; default = 1)
* @buf: data blob to dump
* @len: number of bytes in the @buf

12
lib/hexdump.c
View File

@ -16,6 +16,8 @@
#include <linux/log2.h>
#include <asm/unaligned.h>
#define MAX_LINE_LENGTH_BYTES 64
const char hex_asc[] = "0123456789abcdef";
const char hex_asc_upper[] = "0123456789ABCDEF";
@ -30,8 +32,10 @@ int hex_dump_to_buffer(const void *buf, size_t len, int rowsize, int groupsize,
int ascii_column;
int ret;
if (rowsize != 16 && rowsize != 32)
if (!rowsize)
rowsize = 16;
else
rowsize = min(rowsize, MAX_LINE_LENGTH_BYTES);
if (len > rowsize) /* limit to one line at a time */
len = rowsize;
@ -126,10 +130,12 @@ void print_hex_dump(const char *prefix_str, int prefix_type, int rowsize,
{
const u8 *ptr = buf;
int i, linelen, remaining = len;
char linebuf[32 * 3 + 2 + 32 + 1];
char linebuf[MAX_LINE_LENGTH_BYTES * 3 + 2 + MAX_LINE_LENGTH_BYTES + 1];
if (rowsize != 16 && rowsize != 32)
if (!rowsize)
rowsize = 16;
else
rowsize = min(rowsize, MAX_LINE_LENGTH_BYTES);
for (i = 0; i < len; i += rowsize) {
linelen = min(remaining, rowsize);

23
test/print_ut.c
View File

@ -244,9 +244,26 @@ static int print_do_hex_dump(struct unit_test_state *uts)
ut_assert_nextline("00000010: 10 00 ..");
ut_assert_console_end();
/* line length */
console_record_reset();
print_hex_dump("", DUMP_PREFIX_ADDRESS, 8, 1, buf, 0x12, true);
ut_assert_nextline("00000000: 00 11 22 33 44 55 66 77 ..\"3DUfw");
ut_assert_nextline("00000008: 88 99 aa bb cc dd ee ff ........");
ut_assert_nextline("00000010: 10 00 ..");
ut_assert_console_end();
unmap_sysmem(buf);
/* long line */
console_record_reset();
buf[0x41] = 0x41;
print_hex_dump("", DUMP_PREFIX_ADDRESS, 0x40, 1, buf, 0x42, true);
ut_assert_nextline("00000000: 00 11 22 33 44 55 66 77 88 99 aa bb cc dd ee ff 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ..\"3DUfw........................................................");
ut_assert_nextline("00000040: 00 41 .A");
ut_assert_console_end();
/* 16-bit */
console_record_reset();
print_hex_dump("", DUMP_PREFIX_ADDRESS, 16, 2, buf, 0x12, true);
print_hex_dump("", DUMP_PREFIX_ADDRESS, 0, 2, buf, 0x12, true);
ut_assert_nextline("00000000: 1100 3322 5544 7766 9988 bbaa ddcc ffee ..\"3DUfw........");
ut_assert_nextline("00000010: 0010 ..");
ut_assert_console_end();
@ -254,7 +271,7 @@ static int print_do_hex_dump(struct unit_test_state *uts)
/* 32-bit */
console_record_reset();
print_hex_dump("", DUMP_PREFIX_ADDRESS, 16, 4, buf, 0x14, true);
print_hex_dump("", DUMP_PREFIX_ADDRESS, 0, 4, buf, 0x14, true);
ut_assert_nextline("00000000: 33221100 77665544 bbaa9988 ffeeddcc ..\"3DUfw........");
ut_assert_nextline("00000010: 00000010 ....");
ut_assert_console_end();
@ -276,7 +293,7 @@ static int print_do_hex_dump(struct unit_test_state *uts)
for (i = 0; i < 4; i++)
buf[4 + i] = 126 + i;
buf[8] = 255;
print_hex_dump("", DUMP_PREFIX_ADDRESS, 16, 1, buf, 10, true);
print_hex_dump("", DUMP_PREFIX_ADDRESS, 0, 1, buf, 10, true);
ut_assert_nextline("00000000: 00 1f 20 21 7e 7f 80 81 ff 99 .. !~.....");
ut_assert_console_end();
unmap_sysmem(buf);