VSMX

Description

Virtual Script Machine Instructions (VSMX) file

Used on:

• RAF file (and so, on Coldboot.raf) with a filename extension .jsx
• some PSP rco

History:

• http://endlessparadigm.com/forum/showthread.php?tid=21485

Rcomage can compile/decompile .jsx (VSMX) <=> .JS (need to change the VSMX version at offset 0x04 to 01 (PSP?) instead of 02 (PS3?)

but it's very buggy and usually doesn't work right

File Layout

(section naming need to be wikifyed):

• VSMX header

• Compiled code/instructions

• Data/String constants

• (method) name table/Object property

• global symbols/Variable/function names

Header

Offset	Size	Example (hex) from coldboot.jsx	Value (conversion)	Notes
0x00	0x04	0x56534D58	VSMX	Magic
0x04	0x04	0x00000200	2.0	Mayor version.Minor version (PSP=1.0) (PS3=2.0)
0x08	0x04	0x34000000	0x34	absolute offset of compiled code/instructions section (also, header length)
0x0C	0x04	0x30100000	0x1030	length of compiled code/instructions section
0x10	0x04	0x64100000	0x1064	absolute offset of STRING table
0x14	0x04	0x7A000000	0x7A	length of STRING table
0x18	0x04	0x08000000	0x8	number of entries inside STRING table
0x1C	0x04	0xDE100000	0x10DE	absolute offset of ATTR table
0x20	0x04	0xA2000000	0xA2	length of ATTR table
0x24	0x04	0x09000000	0x9	number of entries inside ATTR table
0x28	0x04	0x80110000	0x1180	absolute offset of GLOBAL table
0x2C	0x04	0x70010000	0x170	length of GLOBAL table
0x30	0x04	0x23000000	0x23	number of entries inside GLOBAL table

• VSMX files are used on:
  • PSP (inside RCO's from video/music UMDs, and two lftv firmware RCO's in flash0/vsh/resource/...)
  • PS3 (inside .RAF's)
  • PSVita & PS4 (unknown)

• Table access related opcodes:
  • 0x28 PUSH_STRING
  • 0x2F GETATTR
  • 0x2E PUSH_GLOBAL

Compiled instructions

• Instructions length: 2x4 bytes?
• See Pastebin (without the header) of the coldboot.

OpCode (short)	Mnemonics (official)	Mnemonics (rcomage)	Note1	Note2
0x00	NOP	-	-	-
0x01	ASSGN	ASSIGN	Assignment Operators	-
0x02	ADD	ADD	Arithmetic Operators	-
0x03	SUB	-	Arithmetic Operators	-
0x04	MUL	MULTIPLY	Arithmetic Operators	-
0x05	DIV	DIVIDE	Arithmetic Operators	-
0x06	MOD	-	Arithmetic Operators	-
0x07	TO_NUMBER	-	-	-
0x08	CSIGN	NEGATE	-	-
0x09	NOT	-	-	-
0x0A	INC	-	Arithmetic Operators	-
0x0B	DEC	-	Arithmetic Operators	-
0x0C	POST_INC	-	-	-
0x0D	POST_DEC	-	-	-
0x0E	CMPEQ	TEST_EQUAL	Compare Operators	-
0x0F	CMPNEQ	-	Compare Operators	-
0x10	CMPSEQ	-	Compare Operators	-
0x11	CMPSNEQ	-	Compare Operators	-
0x12	CMPLT	-	Compare Operators	-
0x13	CMPLE	-	Compare Operators	-
0x14	CMPGE	-	Compare Operators	-
0x15	CMPGT	-	Compare Operators	-
0x16	INSTANCEOF	-	-	-
0x17	IN	-	-	-
0x18	TYPEOF	-	-	-
0x19	BIT_AND	-	Bitwise Operators	-
0x1A	BIT_XOR	-	Bitwise Operators	-
0x1B	BIT_OR	-	Bitwise Operators	-
0x1C	BIT_NOT	-	Bitwise Operators	-
0x1D	LSHIFT	-	Bitwise Operators	-
0x1E	S_RSHIFT	-	Bitwise Operators	-
0x1F	U_RSHIFT	-	-	-
0x20	COPY	-	-	-
0x21	SWAP	-	-	-
0x22	REMOVE	END_STATEMENT	-	-
0x23	PUSH_UNDEFINED	CONST_NULL	-	-
0x24	PUSH_NULL	-	-	-
0x25	PUSH_BOOL	-	-	-
0x26	PUSH_INT	CONST_INT	-	-
0x27	PUSH_FLOAT	CONST_FLOAT	-	-
0x28	PUSH_STRING	CONST_STRING	-	-
0x29	PUSH_OBJECT	-	-	-
0x2A	PUSH_FUNC	FUNCTION	-	uses table pointers !
0x2B	PUSH_ARRAY	-	-	-
0x2C	PUSH_THIS	-	-	-
0x2D	PUSH_LOCAL	UNNAMED_VARIABLE	-	-
0x2E	PUSH_GLOBAL	NAME	-	-
0x2F	GETATTR	PROPERTY	-	-
0x30	GETATTR_KEEPOBJ	METHOD	-	-
0x31	SETATTR	SET	-	-
0x32	DELATTR	-	-	-
0x33	APPEND_ATTR	-	-	-
0x34	GETITEM	-	-	-
0x35	GETITEM_KEEPOBJ	-	-	-
0x36	SETITEM	ARRAY_INDEX_ASSIGN	-	-
0x37	DELITEM	-	-	-
0x38	APPEND_ITEM	-	-	-
0x39	JUMP	JUMP	-	-
0x3A	JUMPT	-	-	-
0x3B	JUMPF	JUMP_IF_FALSE	-	-
0x3C	CALL_FUNC	-	-	-
0x3D	CALL_METHOD	CALL_METHOD	-	-
0x3E	CALL_CONSTRUCTOR	CALL_INBUILT	-	-
0x3F	RET	RETURN	-	-
0x40	THROW	-	-	-
0x41	TRYBLK_IN	-	-	-
0x42	TRYBLK_OUT	-	-	-
0x43	CATCH_FINALLYBLK_IN	-	-	-
0x44	CATCH_FINALLYBLK_OUT	-	-	-
0x45	HALT	END_SCRIPT	-	-
0x46	DEBUG_FILE	-	-	-
0x47	DEBUG_LINE	-	-	-
0x48	GETITEM_KEEPOBJNAME	-	-	-
0x49	PUSH_VECTOR	UNKNOWN_49	-	-
0x4A	GET_VECTOR_ELEMENT	UNKNOWN_4a	-	-
0x4B	GET_VECTOR_ELEMENT_KEEPVECTOR	-	-	-
0x4C	ASSGN_VECTOR_ELEMENT	-	-	-
0x4D	SETATTR_VECTOR_ELEMENT	UNKNOWN_4d	-	-
0x4E	SETITEM_VECTOR_ELEMENT	-	-	-

Arithmetic Operators

May be move later to PlayStation_JavaScript or make it as template

Arithmetic operators are used to perform arithmetic between variables and/or values.

• http://www.w3schools.com/js/js_operators.asp

OpCode (VSMX)	Mnemonics (VSMX)	Syntax (PSJS)	Description:
0x02	ADD	+	Addition
0x03	SUB	-	Subtraction
0x04	MUL	*	Multiplication
0x05	DIV	/	Division
0x06	MOD	%	Modulus (division remainder)
0x0A	INC	++	Increment
0x0B	DEC	--	Decrement

Bitwise Operators

Bit operators work on 32 bits numbers.

Any numeric operand in the operation is converted into a 32 bit number.

• http://www.w3schools.com/js/js_operators.asp

OpCode (VSMX)	Mnemonics (VSMX)	Syntax (PSJS)	Description:
0x19	BIT_AND	&	AND
0x1B	BIT_OR	|	OR
0x1C	BIT_NOT	~	NOT
0x1A	BIT_XOR	^	XOR
0x1D	LSHIFT	<<	Left Shift
0x1E	S_RSHIFT	>>	Right Shift

Compare Operators

Comparison and Logical operators are used to test for true or false.

Comparison operators are used in logical statements to determine equality or difference between variables or values.

• http://www.w3schools.com/js/js_comparisons.asp

OpCode (VSMX)	Mnemonics (VSMX)	Syntax (PSJS)	Description:
0x0E	CMPEQ	==	Equality
0x10	CMPSEQ	===	Strict Equal value and equal type
0x0F	CMPNEQ	!=	Inequality
0x11	CMPSNEQ	!==	Strict not equal value or not equal type
0x15	CMPGT	>	Greater Than
0x14	CMPGE	>=	Greater Than or Equal To
0x12	CMPLT	<	Less Than
0x13	CMPLE	<=	Less Than or Equal To

• http://es5.github.io/#x11.9.3 The Abstract Equality Comparison Algorithm
• http://es5.github.io/#x11.9.6 The Strict Equality Comparison Algorithm

Logical Operators

Comparison and Logical operators are used to test for true or false.

Logical operators are used to determine the logic between variables or values.

• http://www.w3schools.com/js/js_comparisons.asp

OpCode (VSMX)	Mnemonics (VSMX)	Syntax (PSJS)	Description:
-		||	or
-		&&	and