Terminal program for MailStation devices
Build: Add a dumb script to relink with segments packed
I can't figure out how to do this with SDCC directly, so make a
script that links everything together, then reads the msterm.map
file generated and gets the sizes of each segment, then links
msterm.ihx again with the proper --code-loc and --data-loc values to
not waste any bytes.
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Makefile
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Makefile
···
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@exit 1
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.endif
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# added to $BASE_ADDR, must be far enough to hold _HEADER code in crt0
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CODE_OFF= 0x100
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# subtracted from the end of the flash/ram page to hold data
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DATA_SIZE= 4800
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all: msterm.bin
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···
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font/spleen-5x8.inc: font/spleen-5x8.hex
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ruby $(SRCDIR)/tools/hexfont2inc.rb $> > $(SRCDIR)/${.TARGET}
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# link
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msterm.ihx: crt0.rel isr.rel putchar.rel getchar.rel lpt.rel modem.rel \
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main.rel mslib.rel csi.rel settings.rel wifi.rel
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$(SDCC) --no-std-crt0 \
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--code-loc `ruby -e 'print ${BASE_ADDR} + ${CODE_OFF}'` \
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--data-loc `ruby -e 'print ${BASE_ADDR} + 0x4000 - ${DATA_SIZE}'` \
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-o ${.TARGET} $>
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@SDCC="$(SDCC) --no-std-crt0" TARGET="$(.TARGET)" \
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BASE_ADDR="$(BASE_ADDR)" CODE_OFF="$(CODE_OFF)" \
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ruby $(SRCDIR)/tools/relink_packed.rb $>
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# convert to binary
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msterm.bin: msterm.ihx
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objcopy -Iihex -Obinary $> $@
···
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exit 1; \
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fi
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# helpers
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disasm: msterm.bin
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z80dasm -al -g ${BASE_ADDR} $> > msterm.dasm
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upload: all
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sudo ../../mailstation-tools/obj/sendload -p 0x4000 msterm.bin
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../../WiFiStation/host/sendload /dev/cuaU0 msterm.bin
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tools/relink_packed.rb
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tools/relink_packed.rb
···
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#/usr/bin/env ruby
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#
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# link, figure out header/code/data sizes, then relink with them packed tightly
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# msTERM
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#
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# Copyright (c) 2021 joshua stein <jcs@jcs.org>
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#
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# Permission to use, copy, modify, and distribute this software for any
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# purpose with or without fee is hereby granted, provided that the above
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# copyright notice and this permission notice appear in all copies.
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#
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# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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#
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def get_size(area)
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File.open("msterm.map", "r") do |f|
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while f && !f.eof?
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line = f.gets
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# _HEADER0 00000000 000000F9 = 249. bytes (ABS,CON)
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if m = line.match(/^#{area} .* (\d+)\. *bytes/)
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return m[1].to_i
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end
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end
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end
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raise "can't find #{area} in msterm.map"
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end
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def sdcc(code_start, data_start)
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s = "#{ENV["SDCC"]} --code-loc #{sprintf("0x%04x", code_start)} " +
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"--data-loc #{sprintf("0x%04x", data_start)} -o #{ENV["TARGET"]} " +
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"#{ARGV.join(" ")}"
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puts s
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system(s)
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end
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base_addr = ENV["BASE_ADDR"].to_i(16)
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header_size = 0x1000
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code_start = base_addr + header_size
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data_start = base_addr + 0x4000
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# link once at a large offset data-loc
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sdcc(code_start, data_start)
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header_size = get_size("_HEADER0")
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printf "header: %d bytes (0x%04x)\n", header_size, header_size
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code_size = get_size("_CODE")
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printf "code: %d bytes (0x%04x)\n", code_size, code_size
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data_size = get_size("_DATA")
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printf "data: %d bytes (0x%04x)\n", data_size, data_size
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printf "total: %d bytes (0x%04x)\n", header_size + code_size + data_size,
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header_size + code_size + data_size
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code_start = base_addr + header_size
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data_start = code_start + code_size
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printf "relinking with base: 0x%04x code: 0x%04x data:0x%04x\n",
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base_addr, code_start, data_start
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sdcc(code_start, data_start)