44 lines
980 B
Ruby
44 lines
980 B
Ruby
module Asm
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ERRSTR_NUMERIC_TOO_LARGE = 'cannot fit numeric literal argument in operand'
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ERRSTR_INVALID_ARG = 'invalid operand argument'
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class Assembler
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def initialize
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@objects = []
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@label_objects = []
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@label_callbacks = []
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@relocations = []
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end
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attr_reader :relocations, :objects
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def add_object(obj)
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@objects << obj
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end
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def add_relocation(*args)
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@relocations << Asm::Relocation.new(*args)
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end
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def register_label_callback(label, io_pos, &block)
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@label_callbacks << [label, io_pos, block]
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end
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def assemble(io)
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@objects.each do |obj|
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obj.assemble io, self
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end
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@relocations.delete_if do |reloc|
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io.seek reloc.position
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if (reloc.label.extern?)
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reloc.handler.call(io, io.tell, reloc.type)
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else
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reloc.handler.call(io, reloc.label.address, reloc.type)
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end
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not reloc.label.extern?
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end
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end
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end
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end
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