mirror of
https://github.com/samsonjs/compiler.git
synced 2026-04-11 11:25:46 +00:00
a4506bab10
There is no binary assembler support for Darwin yet! I'm not sure when I will dive into the details of generating a Mach-O binary from Ruby or C. [MERGED] Binary assembler support. It *should* work on ELF but it needs testing on Linux.
51 lines
1.2 KiB
Ruby
51 lines
1.2 KiB
Ruby
# Assembler container module. Sub modules are Text and Binary, which
|
|
# both export the same interface for generating either assembly or
|
|
# machine code for x86.
|
|
#
|
|
# sjs
|
|
# may 2009
|
|
|
|
module Assembler
|
|
|
|
# Abstract class for common functionality between different code
|
|
# generators. Also defines somewhat of an interface that must be
|
|
# implemented to be useful.
|
|
class AssemblerBase
|
|
|
|
def initialize(*args)
|
|
@vars = {} # Symbol table, maps names to locations in BSS.
|
|
@num_labels = 0 # Used to generate unique labels.
|
|
@num_labels_with_suffix = Hash.new(0)
|
|
|
|
# Maps names to locations.
|
|
@labels = Hash.new {|h, key| raise "undefined label: #{key}"}
|
|
|
|
end
|
|
|
|
def block(*args, &blk)
|
|
instance_eval(&blk)
|
|
end
|
|
|
|
def output
|
|
raise "#{self.class} is supposed to implement this method!"
|
|
end
|
|
|
|
def var(name)
|
|
@vars[name]
|
|
end
|
|
alias_method :var?, :var
|
|
|
|
# Generate a unique label.
|
|
def label(suffix=nil)
|
|
@num_labels += 1
|
|
if suffix
|
|
@num_labels_with_suffix[suffix] += 1
|
|
suffix = "_#{suffix}_#{@num_labels_with_suffix[suffix]}"
|
|
end
|
|
name = "L#{sprintf "%06d", @num_labels}#{suffix}"
|
|
return name
|
|
end
|
|
|
|
end
|
|
|
|
end
|