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The supporting infrastructure includes a C program for reading a binary blob of x86 code and wrapping it in an ELF executable for Linux x86. Unsure about getting the data for other sections of the binary besides .text.
39 lines
1,002 B
Ruby
39 lines
1,002 B
Ruby
require 'compiler'
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require 'stringio'
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def error(msg) STDERR.puts(msg) end
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def parse(input)
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compiler = Compiler.new(input)
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compiler.parse # tuple of [data, bss, code, binary]
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rescue ParseError => e
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error("[error] #{e.message}")
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error("[context] #{e.context}")
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# error("Aborting!")
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error(e.caller)
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exit(1)
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end
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def interpolate(template, data)
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data.inject(template) do |template, mapping|
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token, replacement = *mapping
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template.sub("{#{token}}", replacement)
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end
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end
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def main(arg)
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input = if File.readable?(arg)
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File.open(arg)
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else
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# StringIO.new("5*(3-5)*2+2-9/3-8/2-4*(5+5+5)\n")
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StringIO.new("abc=999\nabc-888\n")
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end
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data, bss, code, binary = *parse(input)
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template = File.read("template.asm")
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asm = interpolate(template, :data => data, :bss => bss, :code => code)
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File.open("test.asm", "w") { |f| f.puts(asm) }
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File.open("test.bin", "wb") { |f| f.write(binary) }
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end
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main(ARGV[0].to_s)
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