Fix circular require

lib/one_gadget/emulators/x86.rb

@@ -46,8 +46,8 @@ module OneGadget
         false
       end
 
-      # Support instruction set.
-      # @return [Array<Instruction>] The support instructions.
+      # Supported instruction set.
+      # @return [Array<Instruction>] The supported instructions.
       def instructions
         [
           Instruction.new('add', 2),

lib/one_gadget/fetchers/amd64.rb

@@ -19,7 +19,7 @@ module OneGadget
 
           true
         end
-        cands + jmp_case_candidates # + sigaction_case_candidates
+        cands + jmp_case_candidates
       end
 
       # find gadgets in form:
@@ -30,7 +30,6 @@ module OneGadget
       #   ...
       #   call execve
       def jmp_case_candidates
-        bin_sh_hex = str_offset('/bin/sh').to_s(16)
         `#{objdump_cmd}|egrep 'rdi.*# #{bin_sh_hex}' -A 3`.split('--').map do |cand|
           cand = cand.lines.map(&:strip).reject(&:empty?)
           jmp_at = cand.index { |c| c.include?('jmp') }

lib/one_gadget/gadget.rb

@@ -60,7 +60,7 @@ module OneGadget
         return build_not_found if table.nil? # remote doesn't have this one either.
 
         # builds found in remote! Ask update gem and download remote gadgets.
-        OneGadget::Helper.ask_update(msg: 'The desired one-gadget can be found in lastest version!')
+        OneGadget::Logger.ask_update(msg: 'The desired one-gadget can be found in lastest version!')
         tmp_file = OneGadget::Helper.download_build(table)
         require tmp_file.path
         tmp_file.unlink

lib/one_gadget/helper.rb

@@ -6,7 +6,6 @@ require 'tempfile'
 require 'elftools'
 
 require 'one_gadget/error'
-require 'one_gadget/logger'
 
 module OneGadget
   # Define some helpful methods here.
@@ -184,14 +183,6 @@ module OneGadget
         nil
       end
 
-      # Show the message of ask user to update gem.
-      # @return [void]
-      def ask_update(msg: '')
-        name = 'one_gadget'
-        cmd = colorize("gem update #{name} && gem cleanup #{name}")
-        OneGadget::Logger.info(msg + "\n" + "Update with: $ #{cmd}" + "\n")
-      end
-
       # Fetch the file archiecture of +file+.
       # @param [String] file The target ELF filename.
       # @return [Symbol]

lib/one_gadget/logger.rb

@@ -31,6 +31,14 @@ module OneGadget
       []
     end
 
+    # Show the message of ask user to update gem.
+    # @return [void]
+    def ask_update(msg: '')
+      name = 'one_gadget'
+      cmd = OneGadget::Helper.colorize("gem update #{name} && gem cleanup #{name}")
+      OneGadget::Logger.info(msg + "\n" + "Update with: $ #{cmd}" + "\n")
+    end
+
     %i[info warn error].each do |sym|
       define_method(sym) do |msg|
         @logger.__send__(sym, msg)

lib/one_gadget/update.rb

@@ -29,7 +29,7 @@ module OneGadget
 
         # show update message
         msg = format('A newer version of OneGadget is available (%s --> %s).', OneGadget::VERSION, latest)
-        OneGadget::Helper.ask_update(msg: msg)
+        OneGadget::Logger.ask_update(msg: msg)
       end
 
       private