1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * Copyright 2022 4 * Roger Knecht <rknecht@pm.de> 5 */ 6 7#include <common.h> 8#include <command.h> 9#include <display_options.h> 10#include <fs.h> 11#include <malloc.h> 12#include <mapmem.h> 13 14static int do_xxd(struct cmd_tbl *cmdtp, int flag, int argc, 15 char *const argv[]) 16{ 17 char *ifname; 18 char *dev; 19 char *file; 20 char *buffer; 21 phys_addr_t addr; 22 loff_t file_size; 23 24 if (argc < 4) 25 return CMD_RET_USAGE; 26 27 ifname = argv[1]; 28 dev = argv[2]; 29 file = argv[3]; 30 31 // check file exists 32 if (fs_set_blk_dev(ifname, dev, FS_TYPE_ANY)) 33 return CMD_RET_FAILURE; 34 35 if (!fs_exists(file)) { 36 log_err("File does not exist: ifname=%s dev=%s file=%s\n", ifname, dev, file); 37 return CMD_RET_FAILURE; 38 } 39 40 // get file size 41 if (fs_set_blk_dev(ifname, dev, FS_TYPE_ANY)) 42 return CMD_RET_FAILURE; 43 44 if (fs_size(file, &file_size)) { 45 log_err("Cannot read file size: ifname=%s dev=%s file=%s\n", ifname, dev, file); 46 return CMD_RET_FAILURE; 47 } 48 49 // allocate memory for file content 50 buffer = calloc(sizeof(char), file_size); 51 if (!buffer) { 52 log_err("Out of memory\n"); 53 return CMD_RET_FAILURE; 54 } 55 56 // map pointer to system memory 57 addr = map_to_sysmem(buffer); 58 59 // read file to memory 60 if (fs_set_blk_dev(ifname, dev, FS_TYPE_ANY)) 61 return CMD_RET_FAILURE; 62 63 if (fs_read(file, addr, 0, 0, &file_size)) { 64 log_err("Cannot read file: ifname=%s dev=%s file=%s\n", ifname, dev, file); 65 return CMD_RET_FAILURE; 66 } 67 68 // print file content 69 print_buffer(0, buffer, sizeof(char), file_size, 0); 70 71 free(buffer); 72 73 return 0; 74} 75 76U_BOOT_LONGHELP(xxd, 77 "<interface> <dev[:part]> <file>\n" 78 " - Print file from 'dev' on 'interface' as hexdump to standard output\n"); 79 80U_BOOT_CMD(xxd, 4, 1, do_xxd, 81 "Print file as hexdump to standard output", 82 xxd_help_text 83); 84