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 decrypt/encrypt .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 (h)	Value (conversion)	Notes
0x00	0x04	0x56534D58	"VSMX"	Magic
0x04	0x04	0x00000200	0002.0000	Version? v1.0 on PSP RCO RCOs (from video/music UMDs and two lftv RCOs in the PSP's flash0/vsh/ressource/.)? V2.0 on PS3 PSJS (.jsx)
0x08	0x04	0x34000000	0x34 (52)	header length
0x0C	0x04	-		length of compiled code/instructions section
0x10	0x04	-		offset of data section
0x14	0x04	-		length of data
0x18	0x04	-		number of data(seen: 1 or 2)
0x1C	0x04	-		offset of name table
0x20	0x04	-		length of name
0x24	0x04	-		number of name
0x28	0x04	-		offset of global symbols
0x2C	0x04	-		length of global symbols
0x30	0x04	-		number of global symbols

Compiled instructions

• Instructions length: 8 bytes

Instructions format should be wikifyed.

OpCode (short)	Mnemonics	Note1	Note2
0x00	NOP	-	-
0x01	ASSGN	Assignment Operators	-
0x02	ADD	Arithmetic Operators	-
0x03	SUB	Arithmetic Operators	-
0x04	MUL	Arithmetic Operators	-
0x05	DIV	Arithmetic Operators	-
0x06	MOD	Arithmetic Operators	-
0x07	TO_NUMBER	-	-
0x08	CSIGN	-	-
0x09	NOT	-	-
0x0A	INC	Arithmetic Operators	-
0x0B	DEC	Arithmetic Operators	-
0x0C	POST_INC	-	-
0x0D	POST_DEC	-	-
0x0E	CMPEQ	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	-	-
0x23	PUSH_UNDEFINED	-	-
0x24	PUSH_NULL	-	-
0x25	PUSH_BOOL	-	-
0x26	PUSH_INT	-	-
0x27	PUSH_FLOAT	-	-
0x28	PUSH_STRING	-	-
0x29	PUSH_OBJECT	-	-
0x2A	PUSH_FUNC	-	-
0x2B	PUSH_ARRAY	-	-
0x2C	PUSH_THIS	-	-
0x2D	PUSH_LOCAL	-	-
0x2E	PUSH_GLOBAL	-	-
0x2F	GETATTR	-	-
0x30	GETATTR_KEEPOBJ	-	-
0x31	SETATTR	-	-
0x32	DELATTR	-	-
0x33	APPEND_ATTR	-	-
0x34	GETITEM	-	-
0x35	GETITEM_KEEPOBJ	-	-
0x36	SETITEM	-	-
0x37	DELITEM	-	-
0x38	APPEND_ITEM	-	-
0x39	JUMP	-	-
0x3A	JUMPT	-	-
0x3B	JUMPF	-	-
0x3C	CALL_FUNC	-	-
0x3D	CALL_METHOD	-	-
0x3E	CALL_CONSTRUCTOR	-	-
0x3F	RET	-	-
0x40	THROW	-	-
0x41	TRYBLK_IN	-	-
0x42	TRYBLK_OUT	-	-
0x43	CATCH_FINALLYBLK_IN	-	-
0x44	CATCH_FINALLYBLK_OUT	-	-
0x45	HALT	-	-
0x46	DEBUG_FILE	-	-
0x47	DEBUG_LINE	-	-
0x48	GETITEM_KEEPOBJNAME	-	-
0x49	PUSH_VECTOR	-	-
0x4A	GET_VECTOR_ELEMENT	-	-
0x4B	GET_VECTOR_ELEMENT_KEEPVECTOR	-	-
0x4C	ASSGN_VECTOR_ELEMENT	-	-
0x4D	SETATTR_VECTOR_ELEMENT	-	-
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