mirror of
https://github.com/DragonMinded/bemaniutils.git
synced 2026-07-12 08:41:32 -05:00
Finish initial RE on bytecode, every opcode is now accounted for.
This commit is contained in:
Jennifer Taylor
parent
79b31c7fa2
commit
142ee31d56
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@ -315,7 +315,7 @@ class SWF(TrackedCoverage, VerboseOutput):
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self.vprint(f"{prefix} {lineno}: {action_name} Flags: {hex(function_flags)}, Name: {funcname}, ByteCode Offset: {hex(bytecode_offset)}, ByteCode Length: {hex(bytecode_count)}")
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# TODO: Need to do something with this parsed function bytecode.
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function = self.__parse_bytecode(datachunk[offset_ptr:(offset_ptr + bytecode_count)], string_offsets=string_offsets, prefix=prefix + " ")
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function = self.__parse_bytecode(datachunk[offset_ptr:(offset_ptr + bytecode_count)], string_offsets=string_offsets, prefix=prefix + " ") # NOQA
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self.vprint(f"{prefix} END_{action_name}")
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offset_ptr += bytecode_count
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@ -452,6 +452,19 @@ class SWF(TrackedCoverage, VerboseOutput):
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obj_count -= 1
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self.vprint(f"{prefix} END_{action_name}")
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elif opcode == AP2Action.INIT_REGISTER:
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obj_count = struct.unpack(">B", datachunk[(offset_ptr + 1):(offset_ptr + 2)])[0]
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offset_ptr += 2
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self.vprint(f"{prefix} {lineno}: {action_name}")
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while obj_count > 0:
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register_no = struct.unpack(">B", datachunk[offset_ptr:(offset_ptr + 1)])[0]
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offset_ptr += 1
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obj_count -= 1
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self.vprint(f"{prefix} REGISTER NO: {register_no}")
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self.vprint(f"{prefix} END_{action_name}")
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elif opcode == AP2Action.STORE_REGISTER:
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obj_count = struct.unpack(">B", datachunk[(offset_ptr + 1):(offset_ptr + 2)])[0]
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offset_ptr += 2
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@ -517,11 +530,25 @@ class SWF(TrackedCoverage, VerboseOutput):
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# to be absolute instead of relative.
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jump_offset += offset_ptr - start_offset
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self.vprint(f"{prefix} {lineno}: {action_name} Offset: {jump_offset}")
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elif opcode == AP2Action.WITH:
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skip_offset = struct.unpack(">H", datachunk[(offset_ptr + 1):(offset_ptr + 3)])[0]
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offset_ptr += 3
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# TODO: I have absolutely no idea what the data which exists in the bytecode buffer at this point
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# represents...
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unknown_data = datachunk[offset_ptr:(offset_ptr + skip_offset)] # NOQA
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offset_ptr += skip_offset
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self.vprint(f"{prefix} {lineno}: {action_name} Unknown Data Length: {skip_offset}")
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elif opcode == AP2Action.ADD_NUM_VARIABLE:
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amount_to_add = struct.unpack(">B", datachunk[(offset_ptr + 1):(offset_ptr + 2)])[0]
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offset_ptr += 2
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self.vprint(f"{prefix} {lineno}: {action_name} Add Value: {amount_to_add}")
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elif opcode == AP2Action.GET_URL2:
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action = struct.unpack(">B", datachunk[(offset_ptr + 1):(offset_ptr + 2)])[0]
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offset_ptr += 2
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self.vprint(f"{prefix} {lineno}: {action_name} URL Action: {action >> 6}")
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elif opcode == AP2Action.START_DRAG:
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constraint = struct.unpack(">b", datachunk[(offset_ptr + 1):(offset_ptr + 2)])[0]
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offset_ptr += 2
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@ -299,6 +299,8 @@ class AP2Action:
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# Takes the top of the stack and duplicates the object before pushing that object to the stack.
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PUSH_DUPLICATE = 44
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# Swaps the position of the two two objects on the stack. If there isn't enough to swap, does
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# nothing.
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STACK_SWAP = 45
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# Get a member value and place it on the stack.
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@ -317,8 +319,15 @@ class AP2Action:
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# stack for the number of params, and then that many values from the stack as function parameters.
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CALL_METHOD = 50
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# Takes at least 3 objects on the stack, the third being the number of parameters, the second being
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# the object to add a method to and the first being the member name.
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NEW_METHOD = 51
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# Takes two objects, pops them off the stack and adds a boolean object to the stack set to true
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# if one is an instance of the other or false otherwise.
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INSTANCEOF = 52
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# Enumerates some sort of object into a variable on the top of the stack.
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ENUMERATE2 = 53
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# Pop two values from the stack, bitwise and them, push the result.
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@ -346,6 +355,8 @@ class AP2Action:
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# the second or not.
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GREATER = 61
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# Pops two objects off the stack and does some sort of OOP with them, the first being the superclass
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# and the second being the subclass.
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EXTENDS = 62
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# Pop a value from the stack and store it in a register specified by the opcode param. Also push
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@ -356,6 +367,12 @@ class AP2Action:
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# as parameters, and uses that to read the next N bytes of bytecode as the function definition.
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DEFINE_FUNCTION2 = 64
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# Grabs a 16 bit offset pointer as the opcode param, then skips bytecode processing forward
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# that many bytes, passing the skipped bytes as pointer data to a function that adds it to the
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# stack as a pointer type, and then adds a copy of the top of the stack before the pointer as a
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# second new stack entry. Strangely enough, if the object on the top of the stack doesn't meet
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# some criteria, the skipped bytes are processed as bytecode. I am not sure what the hell is going
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# on here.
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WITH = 66
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# Push an object onto the stack. Creates objects based on the bytecode parameters and pushes
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@ -365,6 +382,9 @@ class AP2Action:
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# Unconditional jump based on bytecode value.
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JUMP = 68
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# Gets a single 8-bit integer as an opcode param, take the top two bits of that param as the
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# action to take. Looks like it is similar to SWF GET_URL2 action. Supported actions are 0,
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# 2 and 3. It pops two objects from the stack to perform against.
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GET_URL2 = 69
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# Pops a value from the stack, jumps to offset from opcode params if value is truthy.
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@ -375,6 +395,8 @@ class AP2Action:
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# in opcode params.
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GOTO_FRAME2 = 71
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# Pops the top of the stack, uses that to get a target, pushes a pointer to that target on
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# the stack.
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GET_TARGET = 72
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# Given a subtype of check and a positive offset to jump to on true, perform a conditional check.
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@ -385,6 +407,9 @@ class AP2Action:
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# Similar to STORE_REGISTER but does not preserve the value on the stack afterwards.
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STORE_REGISTER2 = 74
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# Take one opcode parameter for the number of registers to in it, and then one opcode parameter
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# per the number of registers param as the register number to init, initializing that register
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# as an "Undefined" object.
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INIT_REGISTER = 75
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# Similar to ADD_NUM_VARIABLE, but operating on a register number instead of the stack. Takes
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@ -447,7 +472,7 @@ class AP2Action:
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cls.DECREMENT: 'DECREMENT',
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cls.CALL_METHOD: 'CALL_METHOD',
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cls.NEW_METHOD: 'NEW_METHOD',
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cls.INSTANCEOF: 'INSTANCEOF',
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cls.INSTANCEOF: 'INSTANCE,OF',
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cls.ENUMERATE2: 'ENUMERATE2',
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cls.BIT_AND: 'BIT_AND',
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cls.BIT_OR: 'BIT_OR',
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@ -505,10 +530,13 @@ class AP2Action:
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cls.REMOVE_SPRITE,
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cls.TRACE,
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cls.TYPEOF,
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cls.INSTANCEOF,
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cls.TARGET_PATH,
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cls.ENUMERATE2,
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cls.THROW,
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cls.CAST_OP,
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cls.IMPLEMENTS_OP,
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cls.STACK_SWAP,
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cls.GET_TIME,
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cls.RETURN,
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cls.POP,
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@ -516,6 +544,7 @@ class AP2Action:
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cls.DELETE,
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cls.DELETE2,
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cls.NEW_OBJECT,
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cls.EXTENDS,
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cls.INIT_ARRAY,
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cls.INIT_OBJECT,
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cls.END_DRAG,
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@ -529,10 +558,12 @@ class AP2Action:
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cls.SET_MEMBER,
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cls.GET_PROPERTY,
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cls.SET_PROPERTY,
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cls.NEW_METHOD,
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cls.CALL_METHOD,
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cls.CALL_FUNCTION,
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cls.TO_NUMBER,
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cls.TO_STRING,
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cls.GET_TARGET,
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}
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