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https://github.com/AsahiLinux/u-boot
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735dd6ef89
If a long hexdump is initated the user may wish to interrupt it. Add support for this. Signed-off-by: Simon Glass <sjg@chromium.org>
187 lines
4.4 KiB
C
187 lines
4.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* lib/hexdump.c
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation. See README and COPYING for
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* more details.
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*/
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#include <common.h>
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#include <hexdump.h>
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#include <mapmem.h>
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#include <linux/ctype.h>
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#include <linux/compat.h>
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#include <linux/log2.h>
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#include <asm/unaligned.h>
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#define MAX_LINE_LENGTH_BYTES 64
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const char hex_asc[] = "0123456789abcdef";
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const char hex_asc_upper[] = "0123456789ABCDEF";
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#if CONFIG_IS_ENABLED(HEXDUMP)
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int hex_dump_to_buffer(const void *buf, size_t len, int rowsize, int groupsize,
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char *linebuf, size_t linebuflen, bool ascii)
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{
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const u8 *ptr = buf;
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int ngroups;
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u8 ch;
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int j, lx = 0;
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int ascii_column;
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int ret;
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if (!rowsize)
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rowsize = 16;
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else
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rowsize = min(rowsize, MAX_LINE_LENGTH_BYTES);
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if (len > rowsize) /* limit to one line at a time */
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len = rowsize;
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if (!is_power_of_2(groupsize) || groupsize > 8)
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groupsize = 1;
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if ((len % groupsize) != 0) /* no mixed size output */
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groupsize = 1;
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ngroups = len / groupsize;
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ascii_column = rowsize * 2 + rowsize / groupsize + 1;
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if (!linebuflen)
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goto overflow1;
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if (!len)
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goto nil;
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if (groupsize == 8) {
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const u64 *ptr8 = buf;
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for (j = 0; j < ngroups; j++) {
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ret = snprintf(linebuf + lx, linebuflen - lx,
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"%s%16.16llx", j ? " " : "",
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get_unaligned(ptr8 + j));
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if (ret >= linebuflen - lx)
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goto overflow1;
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lx += ret;
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}
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} else if (groupsize == 4) {
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const u32 *ptr4 = buf;
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for (j = 0; j < ngroups; j++) {
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ret = snprintf(linebuf + lx, linebuflen - lx,
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"%s%8.8x", j ? " " : "",
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get_unaligned(ptr4 + j));
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if (ret >= linebuflen - lx)
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goto overflow1;
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lx += ret;
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}
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} else if (groupsize == 2) {
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const u16 *ptr2 = buf;
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for (j = 0; j < ngroups; j++) {
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ret = snprintf(linebuf + lx, linebuflen - lx,
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"%s%4.4x", j ? " " : "",
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get_unaligned(ptr2 + j));
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if (ret >= linebuflen - lx)
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goto overflow1;
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lx += ret;
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}
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} else {
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for (j = 0; j < len; j++) {
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if (linebuflen < lx + 2)
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goto overflow2;
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ch = ptr[j];
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linebuf[lx++] = hex_asc_hi(ch);
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if (linebuflen < lx + 2)
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goto overflow2;
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linebuf[lx++] = hex_asc_lo(ch);
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if (linebuflen < lx + 2)
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goto overflow2;
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linebuf[lx++] = ' ';
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}
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if (j)
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lx--;
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}
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if (!ascii)
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goto nil;
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while (lx < ascii_column) {
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if (linebuflen < lx + 2)
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goto overflow2;
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linebuf[lx++] = ' ';
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}
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for (j = 0; j < len; j++) {
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if (linebuflen < lx + 2)
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goto overflow2;
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ch = ptr[j];
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linebuf[lx++] = (isascii(ch) && isprint(ch)) ? ch : '.';
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}
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nil:
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linebuf[lx] = '\0';
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return lx;
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overflow2:
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linebuf[lx++] = '\0';
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overflow1:
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return ascii ? ascii_column + len : (groupsize * 2 + 1) * ngroups - 1;
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}
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int print_hex_dump(const char *prefix_str, int prefix_type, int rowsize,
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int groupsize, const void *buf, size_t len, bool ascii)
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{
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const u8 *ptr = buf;
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int i, linelen, remaining = len;
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char linebuf[MAX_LINE_LENGTH_BYTES * 3 + 2 + MAX_LINE_LENGTH_BYTES + 1];
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if (!rowsize)
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rowsize = 16;
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else
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rowsize = min(rowsize, MAX_LINE_LENGTH_BYTES);
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for (i = 0; i < len; i += rowsize) {
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linelen = min(remaining, rowsize);
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remaining -= rowsize;
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hex_dump_to_buffer(ptr + i, linelen, rowsize, groupsize,
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linebuf, sizeof(linebuf), ascii);
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switch (prefix_type) {
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case DUMP_PREFIX_ADDRESS:
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printf("%s%0*lx: %s\n", prefix_str,
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IS_ENABLED(CONFIG_PHYS_64BIT) ? 16 : 8,
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(ulong)map_to_sysmem(ptr) + i, linebuf);
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break;
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case DUMP_PREFIX_OFFSET:
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printf("%s%.8x: %s\n", prefix_str, i, linebuf);
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break;
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default:
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printf("%s%s\n", prefix_str, linebuf);
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break;
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}
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if (!IS_ENABLED(CONFIG_SPL_BUILD) && ctrlc())
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return -EINTR;
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}
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return 0;
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}
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void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
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const void *buf, size_t len)
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{
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print_hex_dump(prefix_str, prefix_type, 16, 1, buf, len, true);
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}
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#else
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/*
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* Some code in U-Boot copy-pasted from Linux kernel uses both
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* functions below so to keep stuff compilable we keep these stubs here.
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*/
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int print_hex_dump(const char *prefix_str, int prefix_type, int rowsize,
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int groupsize, const void *buf, size_t len, bool ascii)
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{
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return -ENOSYS;
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}
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void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
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const void *buf, size_t len)
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{
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}
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#endif /* CONFIG_HEXDUMP */
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