tools/translate_minified

   1 #!/bin/sh
   2 # Translate a Mu program to a _minified_ bootable disk image.
   3 #
   4 # Hacky; only intended for some stats at the moment, even though all programs
   5 # I've run through it seem to continue to work. If there are no power-on unit
   6 # tests, I don't trust it.
   7
   8 set -ev
   9
  10 # Map of the Mu code disk
  11 export DISK=20160  # 20*16*63 512-byte sectors = almost 10MB
  12 dd if=/dev/zero of=code.img count=$DISK status=none
  13 # code: sectors 0-8999
  14 # font: sectors 9000-10079  (1080 sectors = space enough for 16k glyphs (1080 * 512 / 34 bytes per glyph))
  15 export FONT=9000  # keep this sync'd with boot.subx
  16 # debug: sector 10080 onwards
  17 export DEBUG=10080
  18
  19 ## Code
  20
  21 cat $* [0-9]*.mu                                          |linux/mu                         > a.subx
  22
  23 cat boot.subx                                             |grep -vh '^\s*$\|^\s*#'          > a.boot.strip
  24 cat           tools/mu-init-minify.subx [0-9]*.subx a.subx|grep -vh '^\s*$\|^\s*#'          > a.strip
  25
  26 # treeshake everything but boot.subx, which isn't quite standard SubX and
  27 # doesn't get parsed correctly by treeshake for some reason.
  28 cat a.strip                                               |tools/treeshake                  > a.treeshake
  29
  30 cat a.boot.strip a.treeshake                              |linux/braces                     > a.braces
  31
  32 cat a.braces                                              |linux/calls                      > a.calls
  33
  34 cat a.calls                                               |linux/sigils                     > a.sigils
  35
  36 cat a.sigils                                              |linux/tests                      > a.tests
  37
  38 # no assort since baremetal SubX doesn't have segments yet
  39
  40 cat a.tests                                               |linux/dquotes                    > a.dquotes
  41
  42 cat a.dquotes                                             |linux/pack                       > a.pack
  43
  44 cat a.pack                                                |linux/survey_baremetal > labels
  45 cat a.pack                                                |linux/labels_baremetal   labels  > a.survey
  46
  47 cat a.survey                                              |linux/hex                        > a.bin
  48
  49 dd if=a.bin of=code.img conv=notrunc status=none
  50
  51 if [ `stat --printf="%s" a.bin` -ge 492544 ]  # 15 tracks * 63 sectors per track * 512 bytes per sector (keep this sync'd with boot.subx)
  52 then
  53   echo "a.bin won't all be loaded on boot"
  54   exit 1
  55 fi
  56
  57 if [ `stat --printf="%s" a.bin` -ge 492544 ]  # 15 tracks * 63 sectors per track * 512 bytes per sector
  58 then
  59   echo "a.bin will overwrite BIOS/Video memory; you'll need to adjust boot.subx to load code to some other non-contiguous area of memory"
  60   exit 1
  61 fi
  62
  63 if [ `stat --printf="%s" a.bin` -ge $(($FONT*512)) ]
  64 then
  65   echo "a.bin will overwrite font in disk"
  66   exit 1
  67 fi
  68
  69 ## Latter half of disk is for debug info
  70
  71 if [ `stat --printf="%s" labels` -ge 1048576 ]  # 8 reads * 256 sectors * 512 bytes per sector
  72 then
  73   echo "labels won't all be loaded on abort"
  74   exit 1
  75 fi
  76
  77 if [ `wc -l < labels` -gt 20480 ]  # 0x5000 stream capacity in abort.subx
  78 then
  79   echo "abort will go into infinite regress"
  80   exit 1
  81 fi
  82
  83 dd if=labels of=code.img seek=$DEBUG conv=notrunc status=none  # keep this sync'd with abort.subx
  84
  85 ## Font data at another well-defined location
  86 cat font.subx   |sed 's,/[^ ]*,,'    |linux/hex    > a.font
  87
  88 if [ `stat --printf="%s" a.font` -ge 262144 ]  # 0x200 sectors * 512 bytes per sector (keep this sync'd with boot.subx)
  89 then
  90   echo "font won't all be loaded on boot"
  91   exit 1
  92 fi
  93
  94 if [ `stat --printf="%s" a.font` -ge 14680064 ]  # 0x00e00000 = 0x00f00000 - 0x00100000
  95 then
  96   echo "font is so large it overlaps the ISA memory hole; see https://wiki.osdev.org/Memory_Map_(x86)"
  97   exit 1
  98 fi
  99
 100 if [ `stat --printf="%s" a.font` -ge $(( ($DEBUG - $FONT) * 512 )) ]
 101 then
 102   echo "font will overwrite debug info in disk"
 103   exit 1
 104 fi
 105
 106 dd if=a.font of=code.img seek=$FONT conv=notrunc status=none