graph-to-graph/chronos/parser.py

10 Regular expression based single instruction parsing utility.
18 The following constants culminate to valid_instruction_re, a regex search pattern, which is used to decipher an instruction mnemonic into the base instruction and all the
84 # The following regexes take the arguments of a specific instruction (whose
86 # from the instruction.
189     '''ARM ldr/str[bh] instruction.'''
262     '''ARM ldm*/stm* instruction.'''
321         # Translate us into a ldm/stm instruction.
337     '''ARM arithmetic instruction with 3 arguments and the result is stored
385     '''ARM move instruction with 2 arguments and the result is stored
400     '''ARM halfmove instruction (movt/movw).'''
418     '''ARM comparison instruction with 2 arguments and the result is stored
459     '''Implement the ARM nop instruction.'''
468         print 'Unhandled instruction "%s" at %#x' % (self.mnemonic, self.addr)
471     '''Provide a dummy implementation of the ARM mrc instruction.'''
481     '''Provide a dummy implementation of the ARM mcr instruction.'''
491     '''Implement ARM's ubfx/sbfx instruction.'''
508     '''Implement ARM's [us]xt[bh] instruction.'''
566         instruction, args = bits[0], []
568         instruction, args = bits
570     g = valid_instruction_re.match(instruction)
572         raise FatalError("Unknown instruction %s at address %#x" % (instruction, addr))
575     instruction = g.group('instruction1')
576     if instruction is None:
577         instruction = g.group('instruction2')
589         instruction = instruction[:-len(dirflags)]
591         instruction = instruction[:-len(cpsflags)]
592     #print 'instruction :' + instruction
593     cls = mnemonic_to_class_map.get(instruction, UnhandledInstruction)
594     #print '%s: %s \n    instruction %s \n   condition %s\n    dirflags %s\n     cpsflags %s\n    setcc %s\n      args %s\n' % (addr,decoding, instruction,condition,dirflags,cpsflags,setcc,args)
597         instruction, condition, dirflags, cpsflags, setcc, args)