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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * lib/hexdump.c
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation. See README and COPYING for
- * more details.
- */
- #include <common.h>
- #include <hexdump.h>
- #include <mapmem.h>
- #include <linux/ctype.h>
- #include <linux/compat.h>
- #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";
- #if CONFIG_IS_ENABLED(HEXDUMP)
- int hex_dump_to_buffer(const void *buf, size_t len, int rowsize, int groupsize,
- char *linebuf, size_t linebuflen, bool ascii)
- {
- const u8 *ptr = buf;
- int ngroups;
- u8 ch;
- int j, lx = 0;
- int ascii_column;
- int ret;
- if (!rowsize)
- rowsize = 16;
- else
- rowsize = min(rowsize, MAX_LINE_LENGTH_BYTES);
- if (len > rowsize) /* limit to one line at a time */
- len = rowsize;
- if (!is_power_of_2(groupsize) || groupsize > 8)
- groupsize = 1;
- if ((len % groupsize) != 0) /* no mixed size output */
- groupsize = 1;
- ngroups = len / groupsize;
- ascii_column = rowsize * 2 + rowsize / groupsize + 1;
- if (!linebuflen)
- goto overflow1;
- if (!len)
- goto nil;
- if (groupsize == 8) {
- const u64 *ptr8 = buf;
- for (j = 0; j < ngroups; j++) {
- ret = snprintf(linebuf + lx, linebuflen - lx,
- "%s%16.16llx", j ? " " : "",
- get_unaligned(ptr8 + j));
- if (ret >= linebuflen - lx)
- goto overflow1;
- lx += ret;
- }
- } else if (groupsize == 4) {
- const u32 *ptr4 = buf;
- for (j = 0; j < ngroups; j++) {
- ret = snprintf(linebuf + lx, linebuflen - lx,
- "%s%8.8x", j ? " " : "",
- get_unaligned(ptr4 + j));
- if (ret >= linebuflen - lx)
- goto overflow1;
- lx += ret;
- }
- } else if (groupsize == 2) {
- const u16 *ptr2 = buf;
- for (j = 0; j < ngroups; j++) {
- ret = snprintf(linebuf + lx, linebuflen - lx,
- "%s%4.4x", j ? " " : "",
- get_unaligned(ptr2 + j));
- if (ret >= linebuflen - lx)
- goto overflow1;
- lx += ret;
- }
- } else {
- for (j = 0; j < len; j++) {
- if (linebuflen < lx + 2)
- goto overflow2;
- ch = ptr[j];
- linebuf[lx++] = hex_asc_hi(ch);
- if (linebuflen < lx + 2)
- goto overflow2;
- linebuf[lx++] = hex_asc_lo(ch);
- if (linebuflen < lx + 2)
- goto overflow2;
- linebuf[lx++] = ' ';
- }
- if (j)
- lx--;
- }
- if (!ascii)
- goto nil;
- while (lx < ascii_column) {
- if (linebuflen < lx + 2)
- goto overflow2;
- linebuf[lx++] = ' ';
- }
- for (j = 0; j < len; j++) {
- if (linebuflen < lx + 2)
- goto overflow2;
- ch = ptr[j];
- linebuf[lx++] = (isascii(ch) && isprint(ch)) ? ch : '.';
- }
- nil:
- linebuf[lx] = '\0';
- return lx;
- overflow2:
- linebuf[lx++] = '\0';
- overflow1:
- return ascii ? ascii_column + len : (groupsize * 2 + 1) * ngroups - 1;
- }
- int print_hex_dump(const char *prefix_str, int prefix_type, int rowsize,
- int groupsize, const void *buf, size_t len, bool ascii)
- {
- const u8 *ptr = buf;
- int i, linelen, remaining = len;
- char linebuf[MAX_LINE_LENGTH_BYTES * 3 + 2 + MAX_LINE_LENGTH_BYTES + 1];
- if (!rowsize)
- rowsize = 16;
- else
- rowsize = min(rowsize, MAX_LINE_LENGTH_BYTES);
- 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);
- switch (prefix_type) {
- case DUMP_PREFIX_ADDRESS:
- printf("%s%0*lx: %s\n", prefix_str,
- IS_ENABLED(CONFIG_PHYS_64BIT) ? 16 : 8,
- (ulong)map_to_sysmem(ptr) + i, linebuf);
- break;
- case DUMP_PREFIX_OFFSET:
- printf("%s%.8x: %s\n", prefix_str, i, linebuf);
- break;
- default:
- printf("%s%s\n", prefix_str, linebuf);
- break;
- }
- if (!IS_ENABLED(CONFIG_SPL_BUILD) && ctrlc())
- return -EINTR;
- }
- return 0;
- }
- void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
- const void *buf, size_t len)
- {
- print_hex_dump(prefix_str, prefix_type, 16, 1, buf, len, true);
- }
- #else
- /*
- * Some code in U-Boot copy-pasted from Linux kernel uses both
- * functions below so to keep stuff compilable we keep these stubs here.
- */
- int print_hex_dump(const char *prefix_str, int prefix_type, int rowsize,
- int groupsize, const void *buf, size_t len, bool ascii)
- {
- return -ENOSYS;
- }
- void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
- const void *buf, size_t len)
- {
- }
- #endif /* CONFIG_HEXDUMP */
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