448 lines
11 KiB
C
448 lines
11 KiB
C
/*
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* Copyright (C) 2007 Ubiquiti Networks, Inc.
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* Copyright (C) 2008 Lukas Kuna <ValXdater@seznam.cz>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <zlib.h>
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#include <sys/mman.h>
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#include <netinet/in.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <limits.h>
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#include "fw.h"
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typedef struct fw_layout_data {
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char name[PATH_MAX];
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u_int32_t kern_start;
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u_int32_t kern_len;
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u_int32_t root_start;
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u_int32_t root_len;
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u_int32_t kern_entry;
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u_int32_t firmware_max_length;
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} fw_layout_t;
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fw_layout_t fw_layout_data[] = {
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{
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.name = "XS2",
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.kern_start = 0xbfc30000,
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.kern_len = 0x00140000,
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.root_start = 0xbfc30000 + 0x00140000,
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.root_len = 0x002C0000,
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.kern_entry = 0x80041000,
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.firmware_max_length= 0x00390000,
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},
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{
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.name = "XS5",
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.kern_start = 0xbe030000,
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.kern_len = 0x00140000,
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.root_start = 0xbe030000 + 0x00140000,
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.root_len = 0x002C0000,
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.kern_entry = 0x80041000,
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.firmware_max_length= 0x00390000,
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},
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{
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.name = "RS",
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.kern_start = 0x00000000,
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.kern_len = 0x00140000,
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.root_start = 0x00000000,
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.root_len = 0x002C0000,
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.kern_entry = 0x80060000,
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.firmware_max_length= 0x00140000 + 0x002C0000,
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},
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{ .name = "",
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},
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};
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typedef struct part_data {
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char partition_name[64];
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int partition_index;
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u_int32_t partition_baseaddr;
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u_int32_t partition_startaddr;
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u_int32_t partition_memaddr;
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u_int32_t partition_entryaddr;
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u_int32_t partition_length;
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char filename[PATH_MAX];
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struct stat stats;
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} part_data_t;
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#define MAX_SECTIONS 8
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#define DEFAULT_OUTPUT_FILE "firmware-image.bin"
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#define DEFAULT_VERSION "UNKNOWN"
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#define OPTIONS "B:hv:o:r:k:"
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static int debug = 0;
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typedef struct image_info {
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char version[256];
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char outputfile[PATH_MAX];
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u_int32_t part_count;
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part_data_t parts[MAX_SECTIONS];
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} image_info_t;
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static void write_header(void* mem, const char* version)
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{
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header_t* header = mem;
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memset(header, 0, sizeof(header_t));
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memcpy(header->magic, MAGIC_HEADER, MAGIC_LENGTH);
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strncpy(header->version, version, sizeof(header->version));
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header->crc = htonl(crc32(0L, (unsigned char *)header,
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sizeof(header_t) - 2 * sizeof(u_int32_t)));
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header->pad = 0L;
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}
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static void write_signature(void* mem, u_int32_t sig_offset)
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{
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/* write signature */
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signature_t* sign = (signature_t*)(mem + sig_offset);
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memset(sign, 0, sizeof(signature_t));
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memcpy(sign->magic, MAGIC_END, MAGIC_LENGTH);
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sign->crc = htonl(crc32(0L,(unsigned char *)mem, sig_offset));
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sign->pad = 0L;
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}
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static int write_part(void* mem, part_data_t* d)
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{
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char* addr;
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int fd;
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part_t* p = mem;
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part_crc_t* crc = mem + sizeof(part_t) + d->stats.st_size;
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fd = open(d->filename, O_RDONLY);
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if (fd < 0)
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{
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ERROR("Failed opening file '%s'\n", d->filename);
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return -1;
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}
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if ((addr=(char*)mmap(0, d->stats.st_size, PROT_READ, MAP_SHARED, fd, 0)) == MAP_FAILED)
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{
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ERROR("Failed mmaping memory for file '%s'\n", d->filename);
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close(fd);
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return -2;
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}
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memcpy(mem + sizeof(part_t), addr, d->stats.st_size);
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munmap(addr, d->stats.st_size);
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memset(p->name, 0, sizeof(p->name));
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strncpy(p->magic, MAGIC_PART, MAGIC_LENGTH);
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strncpy(p->name, d->partition_name, sizeof(p->name));
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p->index = htonl(d->partition_index);
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p->data_size = htonl(d->stats.st_size);
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p->part_size = htonl(d->partition_length);
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p->baseaddr = htonl(d->partition_baseaddr);
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p->memaddr = htonl(d->partition_memaddr);
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p->entryaddr = htonl(d->partition_entryaddr);
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crc->crc = htonl(crc32(0L, mem, d->stats.st_size + sizeof(part_t)));
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crc->pad = 0L;
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return 0;
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}
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static void usage(const char* progname)
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{
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INFO("Version %s\n"
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"Usage: %s [options]\n"
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"\t-v <version string>\t - firmware version information, default: %s\n"
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"\t-o <output file>\t - firmware output file, default: %s\n"
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"\t-k <kernel file>\t\t - kernel file\n"
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"\t-r <rootfs file>\t\t - rootfs file\n"
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"\t-B <board name>\t\t - choose firmware layout for specified board (XS2, XS5, RS)\n"
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"\t-h\t\t\t - this help\n", VERSION,
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progname, DEFAULT_VERSION, DEFAULT_OUTPUT_FILE);
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}
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static void print_image_info(const image_info_t* im)
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{
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int i = 0;
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INFO("Firmware version: '%s'\n"
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"Output file: '%s'\n"
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"Part count: %u\n",
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im->version, im->outputfile,
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im->part_count);
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for (i = 0; i < im->part_count; ++i)
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{
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const part_data_t* d = &im->parts[i];
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INFO(" %10s: %8ld bytes (free: %8ld)\n",
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d->partition_name,
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d->stats.st_size,
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d->partition_length - d->stats.st_size);
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}
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}
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static u_int32_t filelength(const char* file)
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{
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FILE *p;
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int ret = -1;
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if ( (p = fopen(file, "rb") ) == NULL) return (-1);
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fseek(p, 0, SEEK_END);
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ret = ftell(p);
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fclose (p);
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return (ret);
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}
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static int create_image_layout(const char* kernelfile, const char* rootfsfile, char* board_name, image_info_t* im)
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{
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part_data_t* kernel = &im->parts[0];
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part_data_t* rootfs = &im->parts[1];
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fw_layout_t* p;
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p = &fw_layout_data[0];
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while ((strlen(p->name) != 0) && (strncmp(p->name, board_name, sizeof(board_name)) != 0))
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p++;
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if (p->name == NULL) {
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printf("BUG! Unable to find default fw layout!\n");
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exit(-1);
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}
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printf("board = %s\n", p->name);
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strcpy(kernel->partition_name, "kernel");
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kernel->partition_index = 1;
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kernel->partition_baseaddr = p->kern_start;
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if ( (kernel->partition_length = filelength(kernelfile)) < 0) return (-1);
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kernel->partition_memaddr = p->kern_entry;
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kernel->partition_entryaddr = p->kern_entry;
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strncpy(kernel->filename, kernelfile, sizeof(kernel->filename));
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if (filelength(rootfsfile) + kernel->partition_length > p->firmware_max_length)
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return (-2);
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strcpy(rootfs->partition_name, "rootfs");
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rootfs->partition_index = 2;
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rootfs->partition_baseaddr = p->root_start;
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rootfs->partition_length = p->firmware_max_length - kernel->partition_length;
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rootfs->partition_memaddr = 0x00000000;
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rootfs->partition_entryaddr = 0x00000000;
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strncpy(rootfs->filename, rootfsfile, sizeof(rootfs->filename));
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printf("kernel: %d %d\n", kernel->partition_length, kernel->partition_baseaddr);
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printf("root: %d %d\n", rootfs->partition_length, rootfs->partition_baseaddr);
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im->part_count = 2;
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return 0;
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}
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/**
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* Checks the availability and validity of all image components.
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* Fills in stats member of the part_data structure.
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*/
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static int validate_image_layout(image_info_t* im)
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{
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int i;
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if (im->part_count == 0 || im->part_count > MAX_SECTIONS)
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{
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ERROR("Invalid part count '%d'\n", im->part_count);
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return -1;
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}
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for (i = 0; i < im->part_count; ++i)
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{
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part_data_t* d = &im->parts[i];
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int len = strlen(d->partition_name);
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if (len == 0 || len > 16)
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{
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ERROR("Invalid partition name '%s' of the part %d\n",
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d->partition_name, i);
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return -1;
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}
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if (stat(d->filename, &d->stats) < 0)
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{
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ERROR("Couldn't stat file '%s' from part '%s'\n",
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d->filename, d->partition_name);
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return -2;
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}
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if (d->stats.st_size == 0)
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{
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ERROR("File '%s' from part '%s' is empty!\n",
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d->filename, d->partition_name);
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return -3;
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}
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if (d->stats.st_size > d->partition_length) {
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ERROR("File '%s' too big (%d) - max size: 0x%08X (exceeds %lu bytes)\n",
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d->filename, i, d->partition_length,
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d->stats.st_size - d->partition_length);
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return -4;
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}
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}
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return 0;
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}
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static int build_image(image_info_t* im)
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{
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char* mem;
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char* ptr;
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u_int32_t mem_size;
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FILE* f;
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int i;
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// build in-memory buffer
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mem_size = sizeof(header_t) + sizeof(signature_t);
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for (i = 0; i < im->part_count; ++i)
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{
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part_data_t* d = &im->parts[i];
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mem_size += sizeof(part_t) + d->stats.st_size + sizeof(part_crc_t);
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}
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mem = (char*)calloc(mem_size, 1);
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if (mem == NULL)
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{
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ERROR("Cannot allocate memory chunk of size '%u'\n", mem_size);
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return -1;
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}
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// write header
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write_header(mem, im->version);
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ptr = mem + sizeof(header_t);
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// write all parts
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for (i = 0; i < im->part_count; ++i)
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{
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part_data_t* d = &im->parts[i];
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int rc;
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if ((rc = write_part(ptr, d)) != 0)
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{
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ERROR("ERROR: failed writing part %u '%s'\n", i, d->partition_name);
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}
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ptr += sizeof(part_t) + d->stats.st_size + sizeof(part_crc_t);
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}
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// write signature
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write_signature(mem, mem_size - sizeof(signature_t));
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// write in-memory buffer into file
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if ((f = fopen(im->outputfile, "w")) == NULL)
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{
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ERROR("Can not create output file: '%s'\n", im->outputfile);
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return -10;
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}
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if (fwrite(mem, mem_size, 1, f) != 1)
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{
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ERROR("Could not write %d bytes into file: '%s'\n",
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mem_size, im->outputfile);
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return -11;
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}
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free(mem);
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fclose(f);
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return 0;
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}
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int main(int argc, char* argv[])
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{
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char kernelfile[PATH_MAX];
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char rootfsfile[PATH_MAX];
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char board_name[PATH_MAX];
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int o, rc;
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image_info_t im;
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memset(&im, 0, sizeof(im));
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memset(kernelfile, 0, sizeof(kernelfile));
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memset(rootfsfile, 0, sizeof(rootfsfile));
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memset(board_name, 0, sizeof(board_name));
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strcpy(im.outputfile, DEFAULT_OUTPUT_FILE);
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strcpy(im.version, DEFAULT_VERSION);
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while ((o = getopt(argc, argv, OPTIONS)) != -1)
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{
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switch (o) {
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case 'v':
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if (optarg)
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strncpy(im.version, optarg, sizeof(im.version));
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break;
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case 'o':
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if (optarg)
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strncpy(im.outputfile, optarg, sizeof(im.outputfile));
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break;
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case 'h':
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usage(argv[0]);
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return -1;
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case 'k':
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if (optarg)
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strncpy(kernelfile, optarg, sizeof(kernelfile));
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break;
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case 'r':
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if (optarg)
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strncpy(rootfsfile, optarg, sizeof(rootfsfile));
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break;
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case 'B':
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if (optarg)
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strncpy(board_name, optarg, sizeof(board_name));
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break;
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}
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}
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if (strlen(board_name) == 0)
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strcpy(board_name, "XS2"); /* default to XS2 */
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if (strlen(kernelfile) == 0)
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{
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ERROR("Kernel file is not specified, cannot continue\n");
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usage(argv[0]);
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return -2;
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}
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if (strlen(rootfsfile) == 0)
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{
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ERROR("Root FS file is not specified, cannot continue\n");
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usage(argv[0]);
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return -2;
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}
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if ((rc = create_image_layout(kernelfile, rootfsfile, board_name, &im)) != 0)
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{
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ERROR("Failed creating firmware layout description - error code: %d\n", rc);
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return -3;
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}
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if ((rc = validate_image_layout(&im)) != 0)
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{
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ERROR("Failed validating firmware layout - error code: %d\n", rc);
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return -4;
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}
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print_image_info(&im);
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if ((rc = build_image(&im)) != 0)
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{
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ERROR("Failed building image file '%s' - error code: %d\n", im.outputfile, rc);
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return -5;
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}
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return 0;
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}
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