be920c4fb5
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25366 a1c6a512-1295-4272-9138-f99709370657
664 lines
20 KiB
C
664 lines
20 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* mkamsboot.c - a tool for merging bootloader code into an Sansa V2
|
|
* (AMS) firmware file
|
|
*
|
|
* Copyright (C) 2008 Dave Chapman
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/*
|
|
|
|
Insert a Rockbox bootloader into a Sansa AMS original firmware file.
|
|
|
|
Layout of a Sansa AMS original firmware file:
|
|
|
|
---------------------- 0x0
|
|
| HEADER |
|
|
|----------------------| 0x400
|
|
| FIRMWARE BLOCK |
|
|
|----------------------| 0x400 + firmware block size
|
|
| LIBRARIES/DATA |
|
|
---------------------- END
|
|
|
|
We replace the main firmware block (bytes 0x400..0x400+firmware_size)
|
|
as follows:
|
|
|
|
|
|
---------------------- 0x0
|
|
| |
|
|
| Dual-boot code |
|
|
| |
|
|
|----------------------|
|
|
| EMPTY SPACE |
|
|
|----------------------|
|
|
| |
|
|
| compressed RB image |
|
|
| |
|
|
|----------------------|
|
|
| |
|
|
| compressed OF image |
|
|
| |
|
|
|----------------------|
|
|
| UCL unpack function |
|
|
----------------------
|
|
|
|
This entire block fits into the space previously occupied by the main
|
|
firmware block - the space saved by compressing the OF image is used
|
|
to store the compressed version of the Rockbox bootloader.
|
|
|
|
On version 1 firmwares, the OF image is typically about 120KB, which allows
|
|
us to store a Rockbox bootloader with an uncompressed size of about 60KB-70KB.
|
|
Version 2 firmwares are bigger and are stored in SDRAM (instead of IRAM).
|
|
In both cases, the RAM we are using is mapped at offset 0x0.
|
|
|
|
mkamsboot then corrects the checksums and writes a new legal firmware
|
|
file which can be installed on the device.
|
|
|
|
When the Sansa device boots, this firmware block is loaded to RAM at
|
|
address 0x0 and executed.
|
|
|
|
Firstly, the dual-boot code will copy the UCL unpack function to the
|
|
end of RAM.
|
|
|
|
Then, depending on the detection of the dual-boot keypress, either the
|
|
OF image or the Rockbox image is copied to the end of RAM (just before
|
|
the ucl unpack function) and uncompressed to the start of RAM.
|
|
|
|
Finally, the ucl unpack function branches to address 0x0, passing
|
|
execution to the uncompressed firmware.
|
|
|
|
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <stdint.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
|
|
#include <ucl/ucl.h>
|
|
|
|
#include "mkamsboot.h"
|
|
|
|
#include "md5.h"
|
|
|
|
/* Header for ARM code binaries */
|
|
#include "dualboot.h"
|
|
|
|
/* Win32 compatibility */
|
|
#ifndef O_BINARY
|
|
#define O_BINARY 0
|
|
#endif
|
|
|
|
/* 4 for m200, 2 for e200/c200, 1 or 2 for fuze/clip, 1 for clip+ */
|
|
const unsigned short hw_revisions[] = {
|
|
[MODEL_FUZE] = 1,
|
|
[MODEL_CLIP] = 1,
|
|
[MODEL_CLIPV2] = 2,
|
|
[MODEL_E200V2] = 2,
|
|
[MODEL_M200V4] = 4,
|
|
[MODEL_C200V2] = 2,
|
|
[MODEL_CLIPPLUS]= 1,
|
|
[MODEL_FUZEV2] = 2,
|
|
};
|
|
|
|
/* version 2 is used in Clipv2, Clip+ and Fuzev2 firmwares */
|
|
const unsigned short fw_revisions[] = {
|
|
[MODEL_FUZE] = 1,
|
|
[MODEL_CLIP] = 1,
|
|
[MODEL_CLIPV2] = 2,
|
|
[MODEL_E200V2] = 1,
|
|
[MODEL_M200V4] = 1,
|
|
[MODEL_C200V2] = 1,
|
|
[MODEL_CLIPPLUS]= 2,
|
|
[MODEL_FUZEV2] = 2,
|
|
};
|
|
|
|
/* Descriptive name of these models */
|
|
const char* model_names[] = {
|
|
[MODEL_FUZE] = "Fuze",
|
|
[MODEL_CLIP] = "Clip",
|
|
[MODEL_CLIPV2] = "Clip",
|
|
[MODEL_CLIPPLUS]= "Clip+",
|
|
[MODEL_E200V2] = "e200",
|
|
[MODEL_M200V4] = "m200",
|
|
[MODEL_C200V2] = "c200",
|
|
[MODEL_FUZEV2] = "Fuze",
|
|
};
|
|
|
|
/* Dualboot functions for these models */
|
|
static const unsigned char* bootloaders[] = {
|
|
[MODEL_FUZE] = dualboot_fuze,
|
|
[MODEL_CLIP] = dualboot_clip,
|
|
[MODEL_CLIPV2] = dualboot_clipv2,
|
|
[MODEL_E200V2] = dualboot_e200v2,
|
|
[MODEL_M200V4] = dualboot_m200v4,
|
|
[MODEL_C200V2] = dualboot_c200v2,
|
|
[MODEL_CLIPPLUS]= dualboot_clipplus,
|
|
[MODEL_FUZEV2] = dualboot_fuzev2,
|
|
};
|
|
|
|
/* Size of dualboot functions for these models */
|
|
const int bootloader_sizes[] = {
|
|
[MODEL_FUZE] = sizeof(dualboot_fuze),
|
|
[MODEL_CLIP] = sizeof(dualboot_clip),
|
|
[MODEL_CLIPV2] = sizeof(dualboot_clipv2),
|
|
[MODEL_E200V2] = sizeof(dualboot_e200v2),
|
|
[MODEL_M200V4] = sizeof(dualboot_m200v4),
|
|
[MODEL_C200V2] = sizeof(dualboot_c200v2),
|
|
[MODEL_CLIPPLUS]= sizeof(dualboot_clipplus),
|
|
[MODEL_FUZEV2] = sizeof(dualboot_fuzev2),
|
|
};
|
|
|
|
/* Model names used in the Rockbox header in ".sansa" files - these match the
|
|
-add parameter to the "scramble" tool */
|
|
static const char* rb_model_names[] = {
|
|
[MODEL_FUZE] = "fuze",
|
|
[MODEL_CLIP] = "clip",
|
|
[MODEL_CLIPV2] = "clv2",
|
|
[MODEL_E200V2] = "e2v2",
|
|
[MODEL_M200V4] = "m2v4",
|
|
[MODEL_C200V2] = "c2v2",
|
|
[MODEL_CLIPPLUS]= "cli+",
|
|
[MODEL_FUZEV2] = "fuz2",
|
|
};
|
|
|
|
/* Model numbers used to initialise the checksum in the Rockbox header in
|
|
".sansa" files - these are the same as MODEL_NUMBER in config-target.h */
|
|
static const int rb_model_num[] = {
|
|
[MODEL_FUZE] = 43,
|
|
[MODEL_CLIP] = 40,
|
|
[MODEL_CLIPV2] = 60,
|
|
[MODEL_E200V2] = 41,
|
|
[MODEL_M200V4] = 42,
|
|
[MODEL_C200V2] = 44,
|
|
[MODEL_CLIPPLUS]= 66,
|
|
[MODEL_FUZEV2] = 68,
|
|
};
|
|
|
|
/* Checksums of unmodified original firmwares - for safety, and device
|
|
detection */
|
|
static struct md5sums sansasums[] = {
|
|
/* NOTE: Different regional versions of the firmware normally only
|
|
differ in the filename - the md5sums are identical */
|
|
|
|
/* model version md5 */
|
|
{ MODEL_E200V2, "3.01.11", "e622ca8cb6df423f54b8b39628a1f0a3" },
|
|
{ MODEL_E200V2, "3.01.14", "2c1d0383fc3584b2cc83ba8cc2243af6" },
|
|
{ MODEL_E200V2, "3.01.16", "12563ad71b25a1034cf2092d1e0218c4" },
|
|
|
|
{ MODEL_FUZE, "1.01.11", "cac8ffa03c599330ac02c4d41de66166" },
|
|
{ MODEL_FUZE, "1.01.15", "df0e2c1612727f722c19a3c764cff7f2" },
|
|
{ MODEL_FUZE, "1.01.22", "5aff5486fe8dd64239cc71eac470af98" },
|
|
{ MODEL_FUZE, "1.02.26", "7c632c479461c48c8833baed74eb5e4f" },
|
|
{ MODEL_FUZE, "1.02.28", "5b34260f6470e75f702a9c6825471752" },
|
|
{ MODEL_FUZE, "1.02.31", "66d01b37462a5ef7ccc6ad37188b4235" },
|
|
|
|
{ MODEL_C200V2, "3.02.05", "b6378ebd720b0ade3fad4dc7ab61c1a5" },
|
|
|
|
{ MODEL_M200V4, "4.00.45", "82e3194310d1514e3bbcd06e84c4add3" },
|
|
{ MODEL_M200V4, "4.01.08-A", "fc9dd6116001b3e6a150b898f1b091f0" },
|
|
{ MODEL_M200V4, "4.01.08-E", "d3fb7d8ec8624ee65bc99f8dab0e2369" },
|
|
|
|
{ MODEL_CLIP, "1.01.17", "12caad785d506219d73f538772afd99e" },
|
|
{ MODEL_CLIP, "1.01.18", "d720b266bd5afa38a198986ef0508a45" },
|
|
{ MODEL_CLIP, "1.01.20", "236d8f75189f468462c03f6d292cf2ac" },
|
|
{ MODEL_CLIP, "1.01.29", "c12711342169c66e209540cd1f27cd26" },
|
|
{ MODEL_CLIP, "1.01.30", "f2974d47c536549c9d8259170f1dbe4d" },
|
|
{ MODEL_CLIP, "1.01.32", "d835d12342500732ffb9c4ee54abec15" },
|
|
{ MODEL_CLIP, "1.01.35", "b4d0edb3b8f2a4e8eee0a344f7f8e480" },
|
|
|
|
{ MODEL_CLIPV2, "2.01.16", "c57fb3fcbe07c2c9b360f060938f80cb" },
|
|
{ MODEL_CLIPV2, "2.01.32", "0ad3723e52022509089d938d0fbbf8c5" },
|
|
{ MODEL_CLIPV2, "2.01.35", "a3cbbd22b9508d7f8a9a1a39acc342c2" },
|
|
|
|
{ MODEL_CLIPPLUS, "01.02.09", "656d38114774c2001dc18e6726df3c5d" },
|
|
|
|
{ MODEL_FUZEV2, "2.01.17", "8b85fb05bf645d08a4c8c3e344ec9ebe" },
|
|
{ MODEL_FUZEV2, "2.02.26", "d4f6f85c3e4a8ea8f2e5acc421641801" },
|
|
{ MODEL_FUZEV2, "2.03.31", "74fb197ccd51707388f3b233402186a6" },
|
|
};
|
|
|
|
#define NUM_MD5S (sizeof(sansasums)/sizeof(sansasums[0]))
|
|
|
|
static unsigned int model_memory_size(int model)
|
|
{
|
|
if(model == MODEL_CLIPV2)
|
|
{
|
|
/* The decompressed Clipv2 OF is around 380kB.
|
|
* Since it doesn't fit in the 0x50000 bytes IRAM, the OF starts
|
|
* with DRAM mapped at 0x0
|
|
*
|
|
* We could use all the available memory (supposedly 8MB)
|
|
* but 1MB ought to be enough for our use
|
|
*/
|
|
return 1 << 20;
|
|
}
|
|
else
|
|
{ /* The OF boots with IRAM (320kB) mapped at 0x0 */
|
|
return 320 << 10;
|
|
}
|
|
}
|
|
|
|
int firmware_revision(int model)
|
|
{
|
|
return fw_revisions[model];
|
|
}
|
|
|
|
static off_t filesize(int fd)
|
|
{
|
|
struct stat buf;
|
|
|
|
if (fstat(fd, &buf) < 0) {
|
|
perror("[ERR] Checking filesize of input file");
|
|
return -1;
|
|
} else {
|
|
return(buf.st_size);
|
|
}
|
|
}
|
|
|
|
static uint32_t get_uint32le(unsigned char* p)
|
|
{
|
|
return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
|
|
}
|
|
|
|
static uint32_t get_uint32be(unsigned char* p)
|
|
{
|
|
return (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
|
|
}
|
|
|
|
static void put_uint32le(unsigned char* p, uint32_t x)
|
|
{
|
|
p[0] = x & 0xff;
|
|
p[1] = (x >> 8) & 0xff;
|
|
p[2] = (x >> 16) & 0xff;
|
|
p[3] = (x >> 24) & 0xff;
|
|
}
|
|
|
|
void calc_MD5(unsigned char* buf, int len, char *md5str)
|
|
{
|
|
int i;
|
|
md5_context ctx;
|
|
unsigned char md5sum[16];
|
|
|
|
md5_starts(&ctx);
|
|
md5_update(&ctx, buf, len);
|
|
md5_finish(&ctx, md5sum);
|
|
|
|
for (i = 0; i < 16; ++i)
|
|
sprintf(md5str + 2*i, "%02x", md5sum[i]);
|
|
}
|
|
|
|
/* Calculate a simple checksum used in Sansa Original Firmwares */
|
|
static uint32_t calc_checksum(unsigned char* buf, uint32_t n)
|
|
{
|
|
uint32_t sum = 0;
|
|
uint32_t i;
|
|
|
|
for (i=0;i<n;i+=4)
|
|
sum += get_uint32le(buf + i);
|
|
|
|
return sum;
|
|
}
|
|
|
|
static int get_model(int model_id)
|
|
{
|
|
switch(model_id) {
|
|
case 0x1e:
|
|
return MODEL_FUZE;
|
|
case 0x22:
|
|
return MODEL_CLIP;
|
|
case 0x23:
|
|
return MODEL_C200V2;
|
|
case 0x24:
|
|
return MODEL_E200V2;
|
|
case 0x25:
|
|
return MODEL_M200V4;
|
|
case 0x27:
|
|
return MODEL_CLIPV2;
|
|
case 0x28:
|
|
return MODEL_CLIPPLUS;
|
|
case 0x70:
|
|
return MODEL_FUZEV2;
|
|
}
|
|
|
|
return MODEL_UNKNOWN;
|
|
}
|
|
|
|
/* Compress using nrv2e algorithm : Thumb decompressor fits in 168 bytes ! */
|
|
static unsigned char* uclpack(unsigned char* inbuf, int insize, int* outsize)
|
|
{
|
|
int maxsize;
|
|
unsigned char* outbuf;
|
|
int r;
|
|
|
|
/* The following formula comes from the UCL documentation */
|
|
maxsize = insize + (insize / 8) + 256;
|
|
|
|
/* Allocate some memory for the output buffer */
|
|
outbuf = malloc(maxsize);
|
|
|
|
if (outbuf == NULL)
|
|
return NULL;
|
|
|
|
r = ucl_nrv2e_99_compress(
|
|
(const ucl_bytep) inbuf,
|
|
(ucl_uint) insize,
|
|
(ucl_bytep) outbuf,
|
|
(ucl_uintp) outsize,
|
|
0, 10, NULL, NULL);
|
|
|
|
if (r != UCL_E_OK || *outsize > maxsize) {
|
|
/* this should NEVER happen, and implies memory corruption */
|
|
fprintf(stderr, "internal error - compression failed: %d\n", r);
|
|
free(outbuf);
|
|
return NULL;
|
|
}
|
|
|
|
return outbuf;
|
|
}
|
|
|
|
#define ERROR(format, ...) \
|
|
do { \
|
|
snprintf(errstr, errstrsize, format, __VA_ARGS__); \
|
|
goto error; \
|
|
} while(0)
|
|
|
|
/* Loads a Sansa AMS Original Firmware file into memory */
|
|
unsigned char* load_of_file(
|
|
char* filename, off_t* bufsize, struct md5sums *sum,
|
|
int* firmware_size, unsigned char** of_packed,
|
|
int* of_packedsize, char* errstr, int errstrsize)
|
|
{
|
|
int fd;
|
|
unsigned char* buf =NULL;
|
|
off_t n;
|
|
unsigned int i=0;
|
|
uint32_t checksum;
|
|
int model_id;
|
|
unsigned int last_word;
|
|
|
|
fd = open(filename, O_RDONLY|O_BINARY);
|
|
if (fd < 0)
|
|
ERROR("[ERR] Could not open %s for reading\n", filename);
|
|
|
|
*bufsize = filesize(fd);
|
|
|
|
buf = malloc(*bufsize);
|
|
if (buf == NULL)
|
|
ERROR("[ERR] Could not allocate memory for %s\n", filename);
|
|
|
|
n = read(fd, buf, *bufsize);
|
|
|
|
if (n != *bufsize)
|
|
ERROR("[ERR] Could not read file %s\n", filename);
|
|
|
|
/* check the file */
|
|
|
|
/* Calculate MD5 checksum of OF */
|
|
calc_MD5(buf, *bufsize, sum->md5);
|
|
|
|
while ((i < NUM_MD5S) && (strcmp(sansasums[i].md5, sum->md5) != 0))
|
|
i++;
|
|
|
|
if (i < NUM_MD5S) {
|
|
*sum = sansasums[i];
|
|
} else {
|
|
int fw_version = (get_uint32le(&buf[0x204]) == 0x0000f000) ? 2 : 1;
|
|
model_id = buf[(fw_version == 2) ? 0x219 : 0x215];
|
|
sum->model = get_model(model_id);
|
|
|
|
if (sum->model == MODEL_UNKNOWN)
|
|
ERROR("[ERR] Unknown firmware model (v%d) - model id 0x%02x\n",
|
|
fw_version, model_id);
|
|
|
|
#if 1 /* comment to test new OFs */
|
|
char tested_versions[100];
|
|
tested_versions[0] = '\0';
|
|
|
|
for (i = 0; i < NUM_MD5S ; i++)
|
|
if (sansasums[i].model == sum->model) {
|
|
if (tested_versions[0] != '\0') {
|
|
strncat(tested_versions, ", ",
|
|
sizeof(tested_versions) - strlen(tested_versions) - 1);
|
|
}
|
|
strncat(tested_versions, sansasums[i].version,
|
|
sizeof(tested_versions) - strlen(tested_versions) - 1);
|
|
}
|
|
|
|
ERROR("[ERR] Original firmware unknown, please try an other version." \
|
|
" Tested %s versions are : %s\n",
|
|
model_names[sum->model], tested_versions);
|
|
#endif
|
|
}
|
|
|
|
/* TODO: Do some more sanity checks on the OF image. Some images (like
|
|
m200v4) dont have a checksum at the end, only padding (0xdeadbeef). */
|
|
last_word = *bufsize - 4;
|
|
checksum = get_uint32le(buf + last_word);
|
|
if (checksum != 0xefbeadde && checksum != calc_checksum(buf, last_word))
|
|
ERROR("%s", "[ERR] Whole file checksum failed\n");
|
|
|
|
if (bootloaders[sum->model] == NULL)
|
|
ERROR("[ERR] Unsupported model - \"%s\"\n", model_names[sum->model]);
|
|
|
|
/* Get the firmware size */
|
|
if (fw_revisions[sum->model] == 1)
|
|
*firmware_size = get_uint32le(&buf[0x0c]);
|
|
else if (fw_revisions[sum->model] == 2)
|
|
*firmware_size = get_uint32le(&buf[0x10]);
|
|
|
|
/* Compress the original firmware image */
|
|
*of_packed = uclpack(buf + 0x400, *firmware_size, of_packedsize);
|
|
if (*of_packed == NULL)
|
|
ERROR("[ERR] Could not compress %s\n", filename);
|
|
|
|
return buf;
|
|
|
|
error:
|
|
free(buf);
|
|
return NULL;
|
|
}
|
|
|
|
/* Loads a rockbox bootloader file into memory */
|
|
unsigned char* load_rockbox_file(
|
|
char* filename, int model, int* bufsize, int* rb_packedsize,
|
|
char* errstr, int errstrsize)
|
|
{
|
|
int fd;
|
|
unsigned char* buf = NULL;
|
|
unsigned char* packed = NULL;
|
|
unsigned char header[8];
|
|
uint32_t sum;
|
|
off_t n;
|
|
int i;
|
|
|
|
fd = open(filename, O_RDONLY|O_BINARY);
|
|
if (fd < 0)
|
|
ERROR("[ERR] Could not open %s for reading\n", filename);
|
|
|
|
/* Read Rockbox header */
|
|
n = read(fd, header, sizeof(header));
|
|
if (n != sizeof(header))
|
|
ERROR("[ERR] Could not read file %s\n", filename);
|
|
|
|
/* Check for correct model string */
|
|
if (memcmp(rb_model_names[model], header + 4, 4)!=0)
|
|
ERROR("[ERR] Expected model name \"%s\" in %s, not \"%4.4s\"\n",
|
|
rb_model_names[model], filename, (char*)header+4);
|
|
|
|
*bufsize = filesize(fd) - sizeof(header);
|
|
|
|
buf = malloc(*bufsize);
|
|
if (buf == NULL)
|
|
ERROR("[ERR] Could not allocate memory for %s\n", filename);
|
|
|
|
n = read(fd, buf, *bufsize);
|
|
|
|
if (n != *bufsize)
|
|
ERROR("[ERR] Could not read file %s\n", filename);
|
|
|
|
/* Check checksum */
|
|
sum = rb_model_num[model];
|
|
for (i = 0; i < *bufsize; i++) {
|
|
/* add 8 unsigned bits but keep a 32 bit sum */
|
|
sum += buf[i];
|
|
}
|
|
|
|
if (sum != get_uint32be(header))
|
|
ERROR("[ERR] Checksum mismatch in %s\n", filename);
|
|
|
|
packed = uclpack(buf, *bufsize, rb_packedsize);
|
|
if(packed == NULL)
|
|
ERROR("[ERR] Could not compress %s\n", filename);
|
|
|
|
free(buf);
|
|
return packed;
|
|
|
|
error:
|
|
free(buf);
|
|
return NULL;
|
|
}
|
|
|
|
#undef ERROR
|
|
|
|
/* Patches a Sansa AMS Original Firmware file */
|
|
void patch_firmware(
|
|
int model, int fw_revision, int firmware_size, unsigned char* buf,
|
|
int len, unsigned char* of_packed, int of_packedsize,
|
|
unsigned char* rb_packed, int rb_packedsize)
|
|
{
|
|
unsigned char *p;
|
|
uint32_t sum, filesum;
|
|
uint32_t ucl_dest;
|
|
unsigned int i;
|
|
|
|
/* Zero the original firmware area - not needed, but helps debugging */
|
|
memset(buf + 0x400, 0, firmware_size);
|
|
|
|
/* Insert dual-boot bootloader at offset 0 */
|
|
memcpy(buf + 0x400, bootloaders[model], bootloader_sizes[model]);
|
|
|
|
/* We are filling the firmware buffer backwards from the end */
|
|
p = buf + 0x400 + firmware_size;
|
|
|
|
/* 1 - UCL unpack function */
|
|
p -= sizeof(nrv2e_d8);
|
|
memcpy(p, nrv2e_d8, sizeof(nrv2e_d8));
|
|
|
|
/* 2 - Compressed copy of original firmware */
|
|
p -= of_packedsize;
|
|
memcpy(p, of_packed, of_packedsize);
|
|
|
|
/* 3 - Compressed copy of Rockbox bootloader */
|
|
p -= rb_packedsize;
|
|
memcpy(p, rb_packed, rb_packedsize);
|
|
|
|
/* Write the locations of the various images to the variables at the
|
|
start of the dualboot image - we save the location of the last byte
|
|
in each image, along with the size in bytes */
|
|
|
|
/* UCL unpack function */
|
|
put_uint32le(&buf[0x420], firmware_size - 1);
|
|
put_uint32le(&buf[0x424], sizeof(nrv2e_d8));
|
|
|
|
/* Compressed original firmware image */
|
|
put_uint32le(&buf[0x428], firmware_size - sizeof(nrv2e_d8) - 1);
|
|
put_uint32le(&buf[0x42c], of_packedsize);
|
|
|
|
/* Compressed Rockbox image */
|
|
put_uint32le(&buf[0x430], firmware_size - sizeof(nrv2e_d8) - of_packedsize
|
|
- 1);
|
|
put_uint32le(&buf[0x434], rb_packedsize);
|
|
|
|
ucl_dest = model_memory_size(model) - 1; /* last byte of memory */
|
|
put_uint32le(&buf[0x438], ucl_dest);
|
|
|
|
/* Update the firmware block checksum */
|
|
sum = calc_checksum(buf + 0x400, firmware_size);
|
|
|
|
if (fw_revision == 1) {
|
|
put_uint32le(&buf[0x04], sum);
|
|
put_uint32le(&buf[0x204], sum);
|
|
} else if (fw_revision == 2) {
|
|
put_uint32le(&buf[0x08], sum);
|
|
put_uint32le(&buf[0x208], sum);
|
|
|
|
/* Update the header checksums */
|
|
put_uint32le(&buf[0x1fc], calc_checksum(buf, 0x1fc));
|
|
put_uint32le(&buf[0x3fc], calc_checksum(buf + 0x200, 0x1fc));
|
|
}
|
|
|
|
/* Update the whole-file checksum */
|
|
filesum = 0;
|
|
for (i=0;i < (unsigned)len - 4; i+=4)
|
|
filesum += get_uint32le(&buf[i]);
|
|
|
|
put_uint32le(buf + len - 4, filesum);
|
|
}
|
|
|
|
/* returns != 0 if the firmware can be safely patched */
|
|
int check_sizes(int model, int rb_packed_size, int rb_unpacked_size,
|
|
int of_packed_size, int of_unpacked_size, int *total_size,
|
|
char *errstr, int errstrsize)
|
|
{
|
|
unsigned int packed_size = bootloader_sizes[model] + sizeof(nrv2e_d8) +
|
|
of_packed_size + rb_packed_size;
|
|
|
|
/* how much memory is available */
|
|
unsigned int memory_size = model_memory_size(model);
|
|
|
|
/* the memory used when unpacking the OF */
|
|
unsigned int ram_of = sizeof(nrv2e_d8) + of_packed_size + of_unpacked_size;
|
|
|
|
/* the memory used when unpacking the bootloader */
|
|
unsigned int ram_rb = sizeof(nrv2e_d8) + rb_packed_size + rb_unpacked_size;
|
|
|
|
*total_size = packed_size;
|
|
|
|
#define ERROR(format, ...) \
|
|
do { \
|
|
snprintf(errstr, errstrsize, format, __VA_ARGS__); \
|
|
return 0; \
|
|
} while(0)
|
|
|
|
/* will packed data fit in the OF file ? */
|
|
if(packed_size > of_unpacked_size)
|
|
ERROR(
|
|
"[ERR] Packed data (%d bytes) doesn't fit in the firmware "
|
|
"(%d bytes)\n", packed_size, of_unpacked_size
|
|
);
|
|
|
|
else if(ram_rb > memory_size)
|
|
ERROR("[ERR] Rockbox can't be unpacked at runtime, needs %d bytes "
|
|
"of memory and only %d available\n", ram_rb, memory_size
|
|
);
|
|
|
|
else if(ram_of > memory_size)
|
|
ERROR("[ERR] OF can't be unpacked at runtime, needs %d bytes "
|
|
"of memory and only %d available\n", ram_of, memory_size
|
|
);
|
|
|
|
return 1;
|
|
|
|
#undef ERROR
|
|
}
|