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46 lines
1.4 KiB
Ruby
46 lines
1.4 KiB
Ruby
# frozen_string_literal: true
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# SPDX-License-Identifier: MIT OR Apache-2.0
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#
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# Copyright (c) 2022 Andre Richter <andre.o.richter@gmail.com>
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def generate_symbols(kernel_elf, output_file)
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File.open(output_file, 'w') do |file|
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header = <<~HEREDOC
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use debug_symbol_types::Symbol;
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# [no_mangle]
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# [link_section = ".rodata.symbol_desc"]
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static KERNEL_SYMBOLS: [Symbol; #{kernel_elf.num_symbols}] = [
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HEREDOC
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file.write(header)
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kernel_elf.symbols.each do |sym|
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value = sym.header.st_value
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size = sym.header.st_size
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name = sym.name
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file.write(" Symbol::new(#{value}, #{size}, \"#{name}\"),\n")
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end
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file.write("];\n")
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end
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end
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def get_symbols_section_virt_addr(kernel_elf)
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kernel_elf.kernel_symbols_section_virt_addr
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end
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def patch_symbol_data(kernel_elf, symbols_blob_path)
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symbols_blob = File.binread(symbols_blob_path)
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raise if symbols_blob.size > kernel_elf.kernel_symbols_section_size
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File.binwrite(kernel_elf.path, File.binread(symbols_blob_path),
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kernel_elf.kernel_symbols_section_offset_in_file)
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end
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def patch_num_symbols(kernel_elf)
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num_packed = [kernel_elf.num_symbols].pack('Q<*') # "Q" == uint64_t, "<" == little endian
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File.binwrite(kernel_elf.path, num_packed, kernel_elf.num_kernel_symbols_offset_in_file)
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end
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