Class: RMasm::Section

Inherits:
Directive show all
Includes:
DirectiveContainer
Defined in:
lib/rmasm/section.rb

Constant Summary collapse

CODE_CORE = 
1
DATA_CORE = 
2
BSS = 
4
READABLE = 
8
WRITABLE = 
16
EXECUTABLE = 
32
VALID_SECTION = 
[:CODE_CORE,:DATA_CORE,:BSS,:READABLE,:WRITABLE,:EXECUTABLE]
CODE = 
CODE_CORE | READABLE | EXECUTABLE
DATA = 
DATA_CORE | READABLE | WRITABLE
DATA_READONLY = 
DATA_CORE | READABLE
@@section_currently_defined = 
0

Instance Attribute Summary collapse

Attributes inherited from Directive

#id

Class Method Summary collapse

Instance Method Summary collapse

Methods included from DirectiveContainer

#<<, #add_directive_core, #init_container, #parent, #parent=

Methods inherited from Directive

#fetch

Constructor Details

#initialize(name) ⇒ Section

Returns a new instance of Section.



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# File 'lib/rmasm/section.rb', line 57

def initialize(name)
  super :section
  @name = name
  @directive_list = []
  init_container
end

Instance Attribute Details

#directive_list ⇒ Object (readonly)

Returns the value of attribute directive_list.



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# File 'lib/rmasm/section.rb', line 40

def directive_list
  @directive_list
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/rmasm/section.rb', line 40

def name
  @name
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/rmasm/section.rb', line 40

def type
  @type
end

Class Method Details

.define(*args, &block) ⇒ Object 



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# File 'lib/rmasm/section.rb', line 111

def self.define(*args, &block)
  # todo check arg length
  sym = args[0]
  
  if ! sym.is_a?(Symbol)
    return Report.error(:R00E1, sym)        
  end

  # Call the block structure definition with the new structure
  new_section = $rmasm.sections.get_or_set( Section.new(sym) )

  # Send the section directive to the assembler with the block (if any)
  $rmasm << [new_section,block]

  # return this section
  new_section
end

.end(*args) ⇒ Object

Close the current section



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# File 'lib/rmasm/section.rb', line 90

def self.end(*args)
  # No args expected, else log error
  if !args.empty?
    return Report.error(:R0013, args.length, "none", "section.end")
  end

  # Cannot close a section being evaluated inside do...end (This would lead to unexpected section declaration)
  if @@section_currently_defined > 0
    return Report.error(:R00F1, $rmasm.context.name)
  end

  # Check if the current context is a section, otherwise log an error
  if ! $rmasm.context.is_a?(Section)
    return Report.error(:R00G1)
  end

  # If ok, then replace the current context with the parent context 
  $rmasm.context = $rmasm.context.parent
  true
end

Instance Method Details

#accept(directive) ⇒ Object 



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# File 'lib/rmasm/section.rb', line 64

def accept(directive)
  # A section accept any directive except Section and Align
  case directive.id
    when :section
      :process
    when :struct
      :parent
    else
      :accept
  end
end

#add_directive(directive) ⇒ Object 



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# File 'lib/rmasm/section.rb', line 85

def add_directive(directive)
  @directive_list << directive
end

#container_block_begin ⇒ Object 



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# File 'lib/rmasm/section.rb', line 76

def container_block_begin()
  @@section_currently_defined += 1
end

#container_block_end ⇒ Object 



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# File 'lib/rmasm/section.rb', line 80

def container_block_end()
  @@section_currently_defined -= 1
end

#to_s ⇒ Object 



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# File 'lib/rmasm/section.rb', line 129

def to_s()
  "Section #{@name}"
end