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"Das U-Boot" Source Tree
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright 2022
4 * Roger Knecht <rknecht@pm.de>
5 */
6
7#include <command.h>
8#include <display_options.h>
9#include <fs.h>
10#include <malloc.h>
11#include <mapmem.h>
12
13static int do_xxd(struct cmd_tbl *cmdtp, int flag, int argc,
14 char *const argv[])
15{
16 char *ifname;
17 char *dev;
18 char *file;
19 char *buffer;
20 phys_addr_t addr;
21 loff_t file_size;
22
23 if (argc < 4)
24 return CMD_RET_USAGE;
25
26 ifname = argv[1];
27 dev = argv[2];
28 file = argv[3];
29
30 // check file exists
31 if (fs_set_blk_dev(ifname, dev, FS_TYPE_ANY))
32 return CMD_RET_FAILURE;
33
34 if (!fs_exists(file)) {
35 log_err("File does not exist: ifname=%s dev=%s file=%s\n", ifname, dev, file);
36 return CMD_RET_FAILURE;
37 }
38
39 // get file size
40 if (fs_set_blk_dev(ifname, dev, FS_TYPE_ANY))
41 return CMD_RET_FAILURE;
42
43 if (fs_size(file, &file_size)) {
44 log_err("Cannot read file size: ifname=%s dev=%s file=%s\n", ifname, dev, file);
45 return CMD_RET_FAILURE;
46 }
47
48 // allocate memory for file content
49 buffer = calloc(sizeof(char), file_size);
50 if (!buffer) {
51 log_err("Out of memory\n");
52 return CMD_RET_FAILURE;
53 }
54
55 // map pointer to system memory
56 addr = map_to_sysmem(buffer);
57
58 // read file to memory
59 if (fs_set_blk_dev(ifname, dev, FS_TYPE_ANY))
60 return CMD_RET_FAILURE;
61
62 if (fs_read(file, addr, 0, 0, &file_size)) {
63 log_err("Cannot read file: ifname=%s dev=%s file=%s\n", ifname, dev, file);
64 return CMD_RET_FAILURE;
65 }
66
67 // print file content
68 print_buffer(0, buffer, sizeof(char), file_size, 0);
69
70 free(buffer);
71
72 return 0;
73}
74
75U_BOOT_LONGHELP(xxd,
76 "<interface> <dev[:part]> <file>\n"
77 " - Print file from 'dev' on 'interface' as hexdump to standard output\n");
78
79U_BOOT_CMD(xxd, 4, 1, do_xxd,
80 "Print file as hexdump to standard output",
81 xxd_help_text
82);