78 lines
1.5 KiB
Ruby
78 lines
1.5 KiB
Ruby
module Elf
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class SymbolTableSection < Section
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def initialize(name, strtab)
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super(name)
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@strtab = strtab
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@symbols = []
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end
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def add_func_symbol(name, value, text_section, linkage)
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@strtab.add_string name
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arr = [name, value, text_section, linkage]
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if (linkage == Elf::Constants::STB_LOCAL)
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@symbols.unshift arr
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else
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@symbols.push arr
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end
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end
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def index_for_name(name)
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@symbols.each_with_index { |sym, idx|
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if (sym[0] == name)
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return idx
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end
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}
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nil
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end
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def type
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Elf::Constants::SHT_SYMTAB
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end
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def ent_size
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16
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end
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def link
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@strtab.index
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end
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def info
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i = -1
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@symbols.each_with_index { |sym, idx|
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if (sym[4] == Elf::Constants::STB_LOCAL)
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i = idx
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end
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}
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i + 1
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end
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def write(io)
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# write undefined symbol
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io.write_uint32 0
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io.write_uint32 0
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io.write_uint32 0
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io.write_uint8 Elf::Constants::STB_LOCAL << 4
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io.write_uint8 0
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io.write_uint16 0
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# write other symbols
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@symbols.each { |sym|
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io.write_uint32 @strtab.index_for(sym[0])
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io.write_uint32 sym[1]
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io.write_uint32 0
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io.write_uint8((sym[3] << 4) + 0)
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io.write_uint8 0
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if (sym[2])
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io.write_uint16 sym[2].index
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else
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# undefined symbol
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io.write_uint16 0
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end
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}
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end
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end
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end
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