89 lines
2.5 KiB
Ruby
89 lines
2.5 KiB
Ruby
# This file is part of Metasm, the Ruby assembly manipulation suite
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# Copyright (C) 2007 Yoann GUILLOT
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#
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# Licence is LGPL, see LICENCE in the top-level directory
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#
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# this exemple illustrates the use of the cparser/preprocessor #factorize functionnality:
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# it generates code that references to the functions imported by a windows executable, and
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# factorizes the windows headers through them
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# usage: factorize-imports.rb <exe> <path to visual studio installation> [<additional func names>... !<func to exclude>]
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#
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require 'metasm'
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include Metasm
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require 'optparse'
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opts = {}
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OptionParser.new { |opt|
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opt.on('--ddk') { opts[:ddk] = true }
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opt.on('-o outfile') { |f| opts[:outfile] = f }
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opt.on('-I additional_header') { |f| (opts[:add_hdrs] ||= []) << f }
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opt.on('--exe executable', '--pe executable') { |f| opts[:pe] = f }
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opt.on('--vs path', '--vspath path') { |f| opts[:vspath] = f }
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}.parse!(ARGV)
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pe = PE.decode_file_header(opts[:pe] || ARGV.shift)
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opts[:vspath] ||= ARGV.shift
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raise 'need a path to the headers' if not opts[:vspath]
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opts[:vspath].chop! if opts[:vspath][-1] == '/'
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opts[:vspath] = opts[:vspath][0...-3] if opts[:vspath][-3..-1] == '/VC'
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pe.decode_imports
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funcnames = pe.imports.map { |id| id.imports.map { |i| i.name } }.flatten.compact.uniq.sort
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ARGV.each { |n|
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if n[0] == ?!
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funcnames.delete n[1..-1]
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else
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funcnames |= [n]
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end
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}
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src = <<EOS + opts[:add_hdrs].to_a.map { |h| "#include <#{h}>\n" }.join
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#define DDK #{opts[:ddk] ? 1 : 0}
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#ifdef __METASM__
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#if DDK
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#pragma include_dir #{opts[:vspath].inspect}
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#else
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#pragma include_dir #{(opts[:vspath]+'/VC/platformsdk/include').inspect}
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#pragma include_dir #{(opts[:vspath]+'/VC/include').inspect}
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#endif
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#pragma prepare_visualstudio
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#pragma no_warn_redefinition
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#define _WIN32_WINNT 0x0600 // vista
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#endif
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#if DDK
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#define NO_INTERLOCKED_INTRINSICS
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typedef struct _CONTEXT CONTEXT; // needed by ntddk.h, but this will pollute the factorized output..
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typedef CONTEXT *PCONTEXT;
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#define dllimport stdcall // wtff
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#include <ntddk.h>
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#include <stdio.h>
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#else
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#include <winternl.h>
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#endif
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EOS
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parser = Ia32.new.new_cparser
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parser.factorize_init
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parser.parse src
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# delete imports not present in the header files
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funcnames.delete_if { |f|
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if not parser.toplevel.symbol[f]
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puts "// #{f.inspect} is not defined in the headers"
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true
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end
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}
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parser.parse 'void *fnptr[] = { ' + funcnames.map { |f| '&'+f }.join(', ') + ' };'
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outfd = (opts[:outfile] ? File.open(opts[:outfile], 'w') : $stdout)
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outfd.puts parser.factorize_final
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outfd.close
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