107 lines
3.8 KiB
Bash
Executable File
107 lines
3.8 KiB
Bash
Executable File
#!/bin/sh
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# Translate a Mu program to a _minified_ bootable disk image.
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#
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# Hacky; only intended for some stats at the moment, even though all programs
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# I've run through it seem to continue to work. If there are no power-on unit
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# tests, I don't trust it.
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set -ev
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# Map of the Mu code disk
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export DISK=20160 # 20*16*63 512-byte sectors = almost 10MB
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dd if=/dev/zero of=code.img count=$DISK status=none
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# code: sectors 0-8999
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# font: sectors 9000-10079 (1080 sectors = space enough for 16k glyphs (1080 * 512 / 34 bytes per glyph))
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export FONT=9000 # keep this sync'd with boot.subx
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# debug: sector 10080 onwards
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export DEBUG=10080
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## Code
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cat $* [0-9]*.mu |linux/mu > a.subx
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cat boot.subx |grep -vh '^\s*$\|^\s*#' > a.boot.strip
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cat tools/mu-init-minify.subx [0-9]*.subx a.subx|grep -vh '^\s*$\|^\s*#' > a.strip
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# treeshake everything but boot.subx, which isn't quite standard SubX and
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# doesn't get parsed correctly by treeshake for some reason.
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cat a.strip |tools/treeshake > a.treeshake
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cat a.boot.strip a.treeshake |linux/braces > a.braces
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cat a.braces |linux/calls > a.calls
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cat a.calls |linux/sigils > a.sigils
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cat a.sigils |linux/tests > a.tests
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# no assort since baremetal SubX doesn't have segments yet
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cat a.tests |linux/dquotes > a.dquotes
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cat a.dquotes |linux/pack > a.pack
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cat a.pack |linux/survey_baremetal > labels
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cat a.pack |linux/labels_baremetal labels > a.survey
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cat a.survey |linux/hex > a.bin
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dd if=a.bin of=code.img conv=notrunc status=none
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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)
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then
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echo "a.bin won't all be loaded on boot"
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exit 1
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fi
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if [ `stat --printf="%s" a.bin` -ge 492544 ] # 15 tracks * 63 sectors per track * 512 bytes per sector
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then
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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"
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exit 1
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fi
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if [ `stat --printf="%s" a.bin` -ge $(($FONT*512)) ]
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then
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echo "a.bin will overwrite font in disk"
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exit 1
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fi
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## Latter half of disk is for debug info
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if [ `stat --printf="%s" labels` -ge 1048576 ] # 8 reads * 256 sectors * 512 bytes per sector
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then
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echo "labels won't all be loaded on abort"
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exit 1
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fi
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if [ `wc -l < labels` -gt 20480 ] # 0x5000 stream capacity in abort.subx
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then
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echo "abort will go into infinite regress"
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exit 1
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fi
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dd if=labels of=code.img seek=$DEBUG conv=notrunc status=none # keep this sync'd with abort.subx
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## Font data at another well-defined location
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cat font.subx |sed 's,/[^ ]*,,' |linux/hex > a.font
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if [ `stat --printf="%s" a.font` -ge 262144 ] # 0x200 sectors * 512 bytes per sector (keep this sync'd with boot.subx)
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then
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echo "font won't all be loaded on boot"
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exit 1
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fi
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if [ `stat --printf="%s" a.font` -ge 14680064 ] # 0x00e00000 = 0x00f00000 - 0x00100000
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then
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echo "font is so large it overlaps the ISA memory hole; see https://wiki.osdev.org/Memory_Map_(x86)"
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exit 1
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fi
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if [ `stat --printf="%s" a.font` -ge $(( ($DEBUG - $FONT) * 512 )) ]
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then
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echo "font will overwrite debug info in disk"
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exit 1
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fi
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dd if=a.font of=code.img seek=$FONT conv=notrunc status=none
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