1 #!/usr/bin/perl 2 ## ----------------------------------------------------------------------- 3 ## 4 ## Copyright 2001-2008 H. Peter Anvin - All Rights Reserved 5 ## 6 ## This program is free software; you can redistribute it and/or modify 7 ## it under the terms of the GNU General Public License as published by 8 ## the Free Software Foundation, Inc., 53 Temple Place Ste 330, 9 ## Boston MA 02111-1307, USA; either version 2 of the License, or 10 ## (at your option) any later version; incorporated herein by reference. 11 ## 12 ## ----------------------------------------------------------------------- 13 14 # 15 # Postprocess the memdisk binary. Used during the 'make' process. 16 # We write memdisk16.bin out to the final memdisk kernel, pad it to an 17 # integral 512-byte sector length, write this number of sectors into the 18 # kernel header field "setup_sects", then append memdisk32.bin 19 20 eval { use bytes; }; 21 22 ($out,$file16,$file32) = @ARGV; 23 24 open(OUT, "> $out\0") or die "$0: Cannot create file: $out\n"; 25 eval { binmode OUT; }; 26 open(FILE, "< $file16\0") or die "$0: Cannot open file: $file16\n"; 27 eval { binmode FILE }; 28 29 @info = stat(FILE); 30 $size = $info[7]; 31 32 $sectors = ($size + 511) >> 9; 33 $xsize = $sectors << 9; 34 35 read(FILE, $f16, $size); 36 37 print OUT $f16; 38 39 if ( $size != $xsize ) { 40 # Pad to a sector boundary 41 print OUT "\0" x ($xsize-$size); 42 } 43 44 seek(OUT, 0x1f1, SEEK_SET); # setup_sects 45 # All sectors are setup except the first 46 print OUT pack("C", $sectors-1); 47 48 seek(OUT, $xsize, SEEK_SET); 49 close(FILE); 50 51 open(FILE, "+< $file32\0") or die "$0: Cannot open file: $file32\n"; 52 53 while ( ($n = read(FILE, $f32, 65536)) > 0 ) { 54 print OUT $f32; 55 } 56 57 close(FILE); 58 close(OUT); 59
