InstructionDisassembler Class Reference

#include <jvmti_dasm.h>

List of all members.

Public Types
enum	Type {   OPCODEERROR = 0, UNKNOWN, OTHER = UNKNOWN, RELATIVE_JUMP,   RELATIVE_COND_JUMP, RELATIVE_CALL, INDIRECT_JUMP, INDIRECT_CALL,   RET }
	Type of instruction. More...
enum	Register { DISASM_REG_NONE }
	General-purpose registers set. More...
enum	Kind { Kind_Imm, Kind_Mem, Kind_Reg }
	Kind of operand. More...
enum	CondJumpType {   JUMP_OVERFLOW = 0, JUMP_NOT_OVERFLOW = 1, JUMP_BELOW = 2, JUMP_NOT_ABOVE_OR_EQUAL = JUMP_BELOW,   JUMP_CARRY = JUMP_BELOW, JUMP_NOT_BELOW = 3, JUMP_ABOVE_OR_EQUAL = JUMP_NOT_BELOW, JUMP_NOT_CARRY = JUMP_NOT_BELOW,   JUMP_ZERO = 4, JUMP_EQUAL = JUMP_ZERO, JUMP_NOT_ZERO = 5, JUMP_NOT_EQUAL = JUMP_NOT_ZERO,   JUMP_BELOW_OR_EQUAL = 6, JUMP_NOT_ABOVE = JUMP_BELOW_OR_EQUAL, JUMP_NOT_BELOW_OR_EQUAL = 7, JUMP_ABOVE = JUMP_NOT_BELOW_OR_EQUAL,   JUMP_SIGN = 8, JUMP_NOT_SIGN = 9, JUMP_PARITY = 10, JUMP_PARITY_EVEN = JUMP_PARITY,   JUMP_NOT_PARITY = 11, JUMP_PARITY_ODD = JUMP_NOT_PARITY, JUMP_LESS = 12, JUMP_NOT_GREATER_OR_EQUAL = JUMP_LESS,   JUMP_NOT_LESS = 13, JUMP_GREATER_OR_EQUAL = JUMP_NOT_LESS, JUMP_LESS_OR_EQUAL = 14, JUMP_NOT_GREATER = JUMP_LESS_OR_EQUAL,   JUMP_NOT_LESS_OR_EQUAL = 15, JUMP_GREATER = JUMP_NOT_LESS_OR_EQUAL, CondJumpType_Count = 16 }
	Enum of possible condtions for conditional jump-s. More...
Public Member Functions
	InstructionDisassembler (void)
	InstructionDisassembler (NativeCodePtr address)
	InstructionDisassembler (InstructionDisassembler &d)
Type	get_type (void) const
	Returns type of underlying instruction.
jint	get_length_with_prefix (void) const
	Returns length (in bytes) of underlying instruction.
NativeCodePtr	get_jump_target_address (void) const
	Returns absolute address of target, if applicable.
CondJumpType	get_cond_jump_type (void) const
	Returns type of conditional jump.
unsigned	get_operands_count (void) const
	Returns number of operands of the instruction.
const Opnd &	get_opnd (unsigned i) const
	Returns i-th operand.
NativeCodePtr	get_target_address_from_context (const Registers *pregs) const
	Calculates and returns address of target basing on the decoded arguments and provided register context.
const char *	get_reg_value (Register reg, const Registers *pcontext) const
	Returns the appropriate register value for the register operand reg.
Classes
struct	Opnd
	Describes an argument of instruction. More...

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Member Enumeration Documentation

enum InstructionDisassembler::Type

Type of instruction.

Enumerator:

OPCODEERROR
UNKNOWN
OTHER
RELATIVE_JUMP
RELATIVE_COND_JUMP
RELATIVE_CALL
INDIRECT_JUMP
INDIRECT_CALL
RET

enum InstructionDisassembler::Register

General-purpose registers set.

Enumerator:

DISASM_REG_NONE

enum InstructionDisassembler::Kind

Kind of operand.

See also:

Opnd

Enumerator:

Kind_Imm	Operand represents a constant.
Kind_Mem	Operand is memory reference.
Kind_Reg	Operand is register.

enum InstructionDisassembler::CondJumpType

Enum of possible condtions for conditional jump-s.

Note:

To simplify decoding, the current order of the enum constants exactly matches the order of ConditionalMnemonic constants in EncoderBase. Reordering of this constants requires some changes in InstructionDisassembler.disasm.

Enumerator:

JUMP_OVERFLOW
JUMP_NOT_OVERFLOW
JUMP_BELOW
JUMP_NOT_ABOVE_OR_EQUAL
JUMP_CARRY
JUMP_NOT_BELOW
JUMP_ABOVE_OR_EQUAL
JUMP_NOT_CARRY
JUMP_ZERO
JUMP_EQUAL
JUMP_NOT_ZERO
JUMP_NOT_EQUAL
JUMP_BELOW_OR_EQUAL
JUMP_NOT_ABOVE
JUMP_NOT_BELOW_OR_EQUAL
JUMP_ABOVE
JUMP_SIGN
JUMP_NOT_SIGN
JUMP_PARITY
JUMP_PARITY_EVEN
JUMP_NOT_PARITY
JUMP_PARITY_ODD
JUMP_LESS
JUMP_NOT_GREATER_OR_EQUAL
JUMP_NOT_LESS
JUMP_GREATER_OR_EQUAL
JUMP_LESS_OR_EQUAL
JUMP_NOT_GREATER
JUMP_NOT_LESS_OR_EQUAL
JUMP_GREATER
CondJumpType_Count

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Constructor & Destructor Documentation

InstructionDisassembler.InstructionDisassembler

(

void

)

InstructionDisassembler.InstructionDisassembler

(

NativeCodePtr

address

)

InstructionDisassembler.InstructionDisassembler

(

InstructionDisassembler &

d

)

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Member Function Documentation

Type InstructionDisassembler.get_type

(

void

)

const

Returns type of underlying instruction.

jint InstructionDisassembler.get_length_with_prefix

(

void

)

const

Returns length (in bytes) of underlying instruction.

The size includes instruction's prefixes, if any.

NativeCodePtr InstructionDisassembler.get_jump_target_address

(

void

)

const

Returns absolute address of target, if applicable.

For instructions other than relative JMP, CALL and conditional jumps, the value is undefined.

CondJumpType InstructionDisassembler.get_cond_jump_type

(

void

)

const

Returns type of conditional jump.

Note:

For instructions other than conditional jump, the value is undefined.

unsigned InstructionDisassembler.get_operands_count

(

void

)

const

Returns number of operands of the instruction.

const Opnd& InstructionDisassembler.get_opnd

(

unsigned

i

)

const

Returns i-th operand.

NativeCodePtr InstructionDisassembler.get_target_address_from_context

(

const Registers *

pregs

)

const

Calculates and returns address of target basing on the decoded arguments and provided register context.

Works for both indirect and direct branches.

Note:

Only valid for branch instructions like JMPs, CALLs, etc.

const char* InstructionDisassembler.get_reg_value	(	Register	reg,
		const Registers *	pcontext
	)			const

Returns the appropriate register value for the register operand reg.

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The documentation for this class was generated from the following file:

• jvmti_dasm.h

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