Initial version of mknkboot - a utility to replace "merge0.cpp" to insert a Rockbox bootloader into a Gigabeat-S nk.bin firmware update image. This was rewritten from scratch, but has been tested to produce output files identical to merge0.cpp.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15570 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Dave Chapman
parent
b9f62e991d
commit
fe16efdd0c
3 changed files with 215 additions and 2 deletions
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@ -11,7 +11,7 @@ LDFLAGS := -g
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CLEANALL := scramble descramble iriver sh2d bmp2rb rdf2binary convbdf \
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generate_rocklatin mkboot ipod_fw codepages uclpack mi4 gigabeat database \
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lngdump telechips gigabeats mktccboot
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lngdump telechips gigabeats mktccboot mknkboot
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all:
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@echo "Run make in your build directory!"
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@ -41,6 +41,9 @@ mkboot: mkboot.c
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mktccboot: mktccboot.c telechips.o
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$(SILENT)$(CC) -g $+ -o $@
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mknkboot: mknkboot.c
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$(SILENT)$(CC) -g $+ -o $@
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lngdump: lngdump.c
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$(SILENT)$(CC) -g $+ -o $@
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2
tools/configure
vendored
2
tools/configure
vendored
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@ -1283,7 +1283,7 @@ EOF
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flash=""
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plugins=""
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swcodec="yes"
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toolset=$gigabeatbitmaptools
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toolset="$gigabeatbitmaptools mknkboot"
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boottool="$rootdir/tools/scramble -gigabeats"
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bootoutput="nk.bin"
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# architecture, manufacturer and model for the target-tree build
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210
tools/mknkboot.c
Normal file
210
tools/mknkboot.c
Normal file
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@ -0,0 +1,210 @@
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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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* $Id$
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*
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* Copyright (C) 2007 by Dave Chapman
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*
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* Based on merge0.cpp by James Espinoza, but completely rewritten.
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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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 <stdlib.h>
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#include <string.h>
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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 <inttypes.h>
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/*
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Description of nk.bin from
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http://www.xs4all.nl/~itsme/projects/xda/wince-flashfile-formats.html
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these files contain most information, several non-contigouos blocks
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may be present and an entrypoint in the code.
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1. a 7 character signature "B000FF\n" ( that is with 3 zeroes, and
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ending in a linefeed )
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2. DWORD for image start
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3. DWORD for image length
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4. followd by several records of this format:
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1. DWORD with address where this block is to be flashed to
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2. DWORD with the length of this block
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3. DWORD with the 32 bit checksum of this block, in perl:
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unpack("%32C*", $data);
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4. followed by <length> bytes of data
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5. the last record has address ZERO, in the length the entrypoint
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into the rom, and ZERO as checksum.
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NOTE: The Gigabeat-S nk.bin contains 171 records, plus the EOF record.
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mknkboot.c appends two images:
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1) A "Disable" image which overwrites a word in the EBoot image
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2) Our bootloader image, which has the same load address as nk.exe
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*/
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/* win32 compatibility */
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#ifndef O_BINARY
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#define O_BINARY 0
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#endif
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#define DISABLE_ADDR 0x88065A10 /* in EBoot */
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#define DISABLE_INSN 0xe3a00001
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#define DISABLE_SUM (0xe3+0xa0+0x00+0x01)
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static void put_uint32le(uint32_t x, unsigned char* p)
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{
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p[0] = x & 0xff;
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p[1] = (x >> 8) & 0xff;
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p[2] = (x >> 16) & 0xff;
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p[3] = (x >> 24) & 0xff;
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}
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static void usage(void)
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{
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printf("Usage: mknkboot <firmware file> <boot file> <output file>\n");
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exit(1);
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}
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static off_t filesize(int fd) {
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struct stat buf;
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if (fstat(fd,&buf) < 0) {
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perror("[ERR] Checking filesize of input file");
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return -1;
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} else {
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return(buf.st_size);
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}
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}
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int main(int argc, char *argv[])
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{
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char *infile, *bootfile, *outfile;
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int fdin, fdboot,fdout;
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int i,n;
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int inlength,bootlength,newlength;
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unsigned char* buf;
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unsigned char* boot;
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unsigned char* disable;
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uint32_t sum;
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if(argc < 3) {
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usage();
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}
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infile = argv[1];
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bootfile = argv[2];
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outfile = argv[3];
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fdin = open(infile, O_RDONLY|O_BINARY);
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if (fdin < 0)
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{
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perror(infile);
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}
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fdboot = open(bootfile, O_RDONLY|O_BINARY);
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if (fdboot < 0)
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{
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perror(bootfile);
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}
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inlength = filesize(fdin);
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bootlength = filesize(fdboot);
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/* Create buffer for original nk.bin, plus our bootloader (with 12
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byte header), plus the 16-byte "disable record" */
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newlength = inlength + (bootlength + 12) + 16;
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buf = malloc(newlength);
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if (buf==NULL)
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{
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printf("[ERR] Could not allocate memory, aborting\n");
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return 1;
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}
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/****** STEP 1 - Read original nk.bin into buffer */
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n = read(fdin, buf, inlength);
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if (n != inlength)
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{
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printf("[ERR] Could not read from %s\n",infile);
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return 2;
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}
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/****** STEP 2 - Move EOF record to the new EOF */
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memcpy(buf + newlength - 12, buf + inlength - 12, 12);
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/****** STEP 3 - Create a record to disable the firmware signature
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check in EBoot */
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disable = buf + inlength - 12;
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put_uint32le(DISABLE_ADDR, disable);
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put_uint32le(4, disable + 4);
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put_uint32le(DISABLE_SUM, disable + 8);
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put_uint32le(DISABLE_INSN, disable + 12);
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/****** STEP 4 - Read the bootloader binary */
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boot = disable + 16;
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n = read(fdboot, boot + 12, bootlength);
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if (n != bootlength)
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{
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printf("[ERR] Could not read from %s\n",bootfile);
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return 3;
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}
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/****** STEP 5 - Create header for bootloader record */
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/* Calculate simple checksum */
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sum = 0;
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for (i = 0; i < bootlength; i++) {
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sum += boot[12 + i];
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}
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put_uint32le(0x88201000, boot); /* nk.exe start address */
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put_uint32le(bootlength, boot + 4);
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put_uint32le(sum, boot + 8);
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/****** STEP 6 - Now write the output file */
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fdout = open(outfile, O_WRONLY|O_CREAT|O_TRUNC|O_BINARY, 0644);
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if (fdout < 0)
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{
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perror(outfile);
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}
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n = write(fdout, buf, newlength);
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if (n != newlength)
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{
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printf("[ERR] Could not write output file %s\n",outfile);
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return 3;
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}
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close(fdin);
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close(fdboot);
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close(fdout);
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return 0;
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}
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