Last active
November 1, 2023 20:38
-
-
Save smx-smx/e6f12128d550cb5eff41a4c180445cc2 to your computer and use it in GitHub Desktop.
nandsim helper
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <?php | |
| function kilo($n){ return $n * 1024; } | |
| function mega($n){ return kilo($n) * 1024; } | |
| function to_cmdline(array $cmd){ | |
| return implode(' ', array_map('escapeshellarg', $cmd)); | |
| } | |
| function make_pipe(array ...$cmds){ | |
| $cmdlines = array_map('to_cmdline', $cmds); | |
| return implode('|', $cmdlines); | |
| } | |
| class Nand { | |
| public $ID; | |
| public $ERASESIZE; | |
| public $DATASIZE; | |
| public $SIZE; | |
| public $OBBSIZE; | |
| public $IN; | |
| public function make_write_command(int $start_block, int $num_blocks, int $mtd_num){ | |
| $pages_per_erase = $this->ERASESIZE / $this->DATASIZE; | |
| $block_size = (0 | |
| // data | |
| + ($pages_per_erase * $this->DATASIZE) | |
| // obb | |
| + ($pages_per_erase * $this->OBBSIZE) | |
| ); | |
| $pipe = [ | |
| ['dd', 'if='.$this->IN, | |
| 'bs='.$block_size, | |
| 'skip='.$start_block, 'count='.$num_blocks], | |
| ['nandwrite', '-qo', "/dev/mtd{$mtd_num}"] | |
| ]; | |
| $cmd = ['sh', '-c', make_pipe(...$pipe)]; | |
| return $cmd; | |
| } | |
| } | |
| $nand = new Nand; | |
| $nand->ID = "\xAF\xF1\x00\x1D"; | |
| $nand->ERASESIZE = kilo(128); | |
| $nand->DATASIZE = kilo(2); | |
| $nand->SIZE = mega(128); | |
| $nand->OBBSIZE = 64; | |
| $nand->IN = $argv[1]; | |
| $TWO_PASS = true; | |
| begin: | |
| $cmds = []; | |
| $cmds[] = ['rmmod', 'mtdblock', 'nandsim']; | |
| $mount = ['modprobe', 'nandsim']; | |
| $mount[] = 'first_id_byte=0x' . bin2hex($nand->ID[0]); | |
| $mount[] = 'second_id_byte=0x' . bin2hex($nand->ID[1]); | |
| $mount[] = 'third_id_byte=0x' . bin2hex($nand->ID[2]); | |
| $mount[] = 'fourth_id_byte=0x' . bin2hex($nand->ID[3]); | |
| $mount[] = 'overridesize=' . log($nand->SIZE / $nand->ERASESIZE) / log(2); | |
| $parts=[]; | |
| $data = file('mtdinfo.txt', FILE_SKIP_EMPTY_LINES | FILE_IGNORE_NEW_LINES); | |
| $last_block = 0; | |
| foreach($data as $l){ | |
| if(!preg_match_all("/0x[0-9a-fA-F]{8}/", $l, $m)) continue; | |
| $m = array_map('hexdec', $m[0]); | |
| list($start, $end) = $m; | |
| $size = $end - $start; | |
| $eraseblocks = $size / $nand->ERASESIZE; | |
| $start_block = $start / $nand->ERASESIZE; | |
| $end_block = $start_block + $eraseblocks; | |
| // if new start block is past the last one | |
| if($start_block > $last_block){ | |
| $padding = $start_block - $last_block; | |
| $parts[count($parts) - 1] += $padding; | |
| } | |
| $parts[] = $eraseblocks; | |
| $last_block = $end_block; | |
| } | |
| $mount[] = 'parts=' . implode(',', $parts); | |
| $cmds[] = $mount; | |
| $current_block = 0; | |
| foreach($parts as $i => $blocks){ | |
| $cmds[] = $nand->make_write_command($current_block, $blocks, $i); | |
| $current_block += $blocks; | |
| } | |
| $cmds[] = ['modprobe', 'mtdblock']; | |
| $cmds[] = ['rm', '-r', 'out']; | |
| $cmds[] = ['mkdir', 'out']; | |
| foreach($parts as $i => $_){ | |
| $cmds[] = ['dd', "if=/dev/mtdblock{$i}", "of=out/mtdblock{$i}.bin"]; | |
| } | |
| $cmds[] = ['chmod', '-R', '666', 'out']; | |
| $cmds[] = ['chmod', '755', 'out']; | |
| $cmds[] = ['sh', '-c', | |
| 'if [ ! -z "$SUDO_USER" ]; then chown -R $SUDO_USER out; fi']; | |
| $cmds[] = ['sh', '-c', | |
| preg_replace('/(\r?\n)|\t/', ' ', <<<'EOS' | |
| for file in out/*; do | |
| sudo -u $SUDO_USER | |
| fakeroot /home/$SUDO_USER/epk2extract/build_linux/epk2extract $file; | |
| done | |
| EOS) | |
| ]; | |
| if($TWO_PASS){ | |
| /** copy new partition table */ | |
| $cmds[] = ['sh', '-c', | |
| 'cp out/*.txt mtdinfo.txt' | |
| ]; | |
| } | |
| foreach($cmds as $i => $c){ | |
| $s_c = implode(' ', $c); | |
| print("[{$i}] {$s_c}\n"); | |
| } | |
| foreach($cmds as $c){ | |
| $h = proc_open($c, [], $p); | |
| proc_close($h); | |
| } | |
| if($TWO_PASS){ | |
| $TWO_PASS = false; | |
| goto begin; | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment