2012-03-04 14:34:29 +00:00
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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*
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* Copyright (C) 2005 by Linus Nielsen Feltzing
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2017-02-10 12:53:46 +00:00
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* Copyright (C) 2017 by William Wilgus
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2012-03-04 14:34:29 +00:00
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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
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* as published by the Free Software Foundation; either version 1
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include <stdio.h>
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#include "config.h"
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#include "system.h"
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#include "file.h"
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#include "loader_strerror.h"
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2017-02-05 20:07:20 +00:00
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#if defined(HAVE_BOOTDATA)
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#include "bootdata.h"
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#include "crc32.h"
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2017-02-10 12:53:46 +00:00
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/* Write bootdata into location in FIRMWARE marked by magic header
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* Assumes buffer is already loaded with the firmware image
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* We just need to find the location and write data into the
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* payload region along with the crc for later verification and use.
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2017-02-05 20:07:20 +00:00
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* Returns payload len on success,
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* On error returns EKEY_NOT_FOUND
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*/
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2020-08-08 06:33:49 +00:00
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int write_bootdata(unsigned char* buf, int len, unsigned int boot_volume)
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2017-02-05 20:07:20 +00:00
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{
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struct boot_data_t bl_boot_data;
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struct boot_data_t *fw_boot_data = NULL;
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int search_len = MIN(len, BOOT_DATA_SEARCH_SIZE) - sizeof(struct boot_data_t);
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int payload_len = EKEY_NOT_FOUND;
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/* search for boot data header prior to search_len */
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for(int i = 0;i < search_len;i++)
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{
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fw_boot_data = (struct boot_data_t*) &buf[i];
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if (fw_boot_data->magic[0] != BOOT_DATA_MAGIC0 ||
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fw_boot_data->magic[1] != BOOT_DATA_MAGIC1)
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continue;
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2017-02-10 12:53:46 +00:00
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2017-02-05 20:07:20 +00:00
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memset(&bl_boot_data.payload, 0, BOOT_DATA_PAYLOAD_SIZE);
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bl_boot_data.boot_volume = boot_volume;
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2017-02-10 12:53:46 +00:00
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2017-02-05 20:07:20 +00:00
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memset(fw_boot_data->payload, 0, fw_boot_data->length);
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/* determine maximum bytes we can write to firmware
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BOOT_DATA_PAYLOAD_SIZE is the size the bootloader expects */
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payload_len = MIN(BOOT_DATA_PAYLOAD_SIZE, fw_boot_data->length);
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fw_boot_data->length = payload_len;
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2017-02-10 12:53:46 +00:00
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/* copy data to FIRMWARE bootdata struct */
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2017-02-05 20:07:20 +00:00
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memcpy(fw_boot_data->payload, &bl_boot_data.payload, payload_len);
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2017-02-10 12:53:46 +00:00
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/* crc will be used within the firmware to check validity of bootdata */
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fw_boot_data->crc = crc_32(fw_boot_data->payload, payload_len, 0xffffffff);
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2017-02-05 20:07:20 +00:00
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break;
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}
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return payload_len;
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}
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#endif /* HAVE_BOOTDATA */
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2017-02-10 12:53:46 +00:00
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#ifdef HAVE_MULTIBOOT /* defined by config.h */
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/* Check in root of this <volume> for rockbox_main.<playername>
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* if this file empty or there is a single slash '/'
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* buf = '<volume#>/<rootdir>/<firmware(name)>\0'
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* If instead '/<*DIRECTORY*>' is supplied
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* addpath will be set to this DIRECTORY buf =
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* '/<volume#>/addpath/<rootdir>/<firmware(name)>\0'
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* On error returns Negative number or 0
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* On success returns bytes from snprintf
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* and generated path will be placed in buf
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* note: if supplied buffer is too small return will be
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* the number of bytes that would have been written
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2012-03-04 14:34:29 +00:00
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*/
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2017-02-10 12:53:46 +00:00
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int get_redirect_dir(char* buf, int buffer_size, int volume,
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const char* rootdir, const char* firmware)
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2012-03-04 14:34:29 +00:00
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{
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int fd;
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2017-02-10 12:53:46 +00:00
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int f_offset;
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char add_path[MAX_PATH];
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/* Check in root of volume for rockbox_main.<playername> redirect */
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snprintf(add_path, sizeof(add_path), "/<%d>/"BOOT_REDIR, volume);
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fd = open(add_path, O_RDONLY);
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if (fd < 0)
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return EFILE_NOT_FOUND;
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/*clear add_path for re-use*/
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memset(add_path, 0, sizeof(add_path));
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f_offset = read(fd, add_path,sizeof(add_path));
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close(fd);
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2012-03-04 14:34:29 +00:00
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2017-02-10 12:53:46 +00:00
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for(int i = f_offset - 1;i > 0; i--)
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2012-03-04 14:34:29 +00:00
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{
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2017-02-10 12:53:46 +00:00
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/* strip control chars < SPACE or all if path doesn't start with '/' */
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if (add_path[i] < 0x20 || add_path[0] != '/')
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add_path[i] = '\0';
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2012-03-04 14:34:29 +00:00
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}
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2017-02-10 12:53:46 +00:00
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/* if '/add_path' is specified in rockbox_main.<playername>
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path is /<vol#>/add_path/rootdir/firmwarename
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if add_path is empty or '/' is missing from beginning
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path is /<vol#>/rootdir/firmwarename
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*/
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return snprintf(buf, buffer_size, "/<%d>%s/%s/%s", volume, add_path,
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rootdir, firmware);
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}
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#endif /* HAVE_MULTIBOOT */
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/* loads a firmware file from supplied filename
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* file opened, checks firmware size and checksum
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* if no error, firmware loaded to supplied buffer
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* file closed
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* Returns size of loaded image on success
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* On error returns Negative value deciphered by means
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* of strerror() function
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*/
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static int load_firmware_filename(unsigned char* buf,
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const char* filename,
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int buffer_size)
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{
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int len;
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unsigned long chksum, sum;
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int i;
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int ret;
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int fd = open(filename, O_RDONLY);
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if (fd < 0)
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return EFILE_NOT_FOUND;
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2012-03-04 14:34:29 +00:00
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len = filesize(fd) - 8;
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if (len > buffer_size)
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{
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ret = EFILE_TOO_BIG;
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goto end;
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}
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lseek(fd, FIRMWARE_OFFSET_FILE_CRC, SEEK_SET);
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2017-02-10 12:53:46 +00:00
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if (read(fd, &chksum, 4) < 4)
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2012-03-04 14:34:29 +00:00
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{
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ret = EREAD_CHKSUM_FAILED;
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goto end;
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}
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2017-02-10 12:53:46 +00:00
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chksum = betoh32(chksum); /* Rockbox checksums are big-endian */
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2012-03-04 14:34:29 +00:00
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lseek(fd, FIRMWARE_OFFSET_FILE_DATA, SEEK_SET);
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2017-02-10 12:53:46 +00:00
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if (read(fd, buf, len) < len)
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2012-03-04 14:34:29 +00:00
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{
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ret = EREAD_IMAGE_FAILED;
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goto end;
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}
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sum = MODEL_NUMBER;
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for(i = 0;i < len;i++)
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{
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sum += buf[i];
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}
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2017-02-10 12:53:46 +00:00
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if (sum != chksum)
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2012-03-04 14:34:29 +00:00
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{
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ret = EBAD_CHKSUM;
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goto end;
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}
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ret = len;
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end:
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close(fd);
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return ret;
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}
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2017-02-10 12:53:46 +00:00
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/* Load firmware image in a format created by add method of tools/scramble
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* on success we return size loaded image
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* on error we return negative value which can be deciphered by means
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* of strerror() function
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*/
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int load_firmware(unsigned char* buf, const char* firmware, int buffer_size)
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{
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int ret = EFILE_NOT_FOUND;
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char filename[MAX_PATH+2];
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/* only filename passed */
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if (firmware[0] != '/')
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{
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#ifdef HAVE_MULTIBOOT /* defined by config.h */
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/* checks <volumes> highest index to lowest for redirect file
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* 0 is the default boot volume, it is not checked here
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* if found <volume>/rockbox_main.<playername> and firmware
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* has a bootdata region this firmware will be loaded */
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for (unsigned int i = NUM_VOLUMES - 1; i > 0 && ret < 0; i--)
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{
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if (get_redirect_dir(filename, sizeof(filename), i,
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BOOTDIR, firmware) > 0)
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{
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ret = load_firmware_filename(buf, filename, buffer_size);
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/* if firmware has no boot_data don't load from external drive */
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if (write_bootdata(buf, ret, i) <= 0)
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ret = EKEY_NOT_FOUND;
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}
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/* if ret is valid breaks from loop to continue loading */
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}
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#endif
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if (ret < 0) /* Check default volume, no valid firmware file loaded yet */
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{
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/* First check in BOOTDIR */
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snprintf(filename, sizeof(filename), BOOTDIR "/%s",firmware);
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ret = load_firmware_filename(buf, filename, buffer_size);
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if (ret < 0)
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{
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/* Check in root dir */
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snprintf(filename, sizeof(filename),"/%s",firmware);
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ret = load_firmware_filename(buf, filename, buffer_size);
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}
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#ifdef HAVE_BOOTDATA
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/* 0 is the default boot volume */
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write_bootdata(buf, ret, 0);
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#endif
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}
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}
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else /* full path passed ROLO etc.*/
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ret = load_firmware_filename(buf, firmware, buffer_size);
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return ret;
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}
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