Instruction Format Classes

Instruction Format Classes#

class pairipcore.insn.InsnFormat[source]#
A: int#
B: int#
C: int#
D: int#
E: int#
__init__(info_off: int, stack_vars: int = 0, extra_vars: int = 0, storage_var: str | None = None) → None[source]#
Parameters:

  • info_off (int)

  • stack_vars (int)

  • extra_vars (int)

  • storage_var (str | None)

Return type:

None

static parse(format_id: str) → InsnFormat[source]#

Parses a format ID string to create an InsnFormat object.

Parameters:

format_id (str) – A string representing the instruction format.

Returns:

The corresponding InsnFormat object.

Return type:

InsnFormat

Raises:

ValueError – If the format ID is empty.

property next_addr_off: int#

Calculates the offset for the next instruction address.

property fallback_addr_off: int#

Calculates the offset for the fallback instruction address.

property hash_off: int#

Calculates the offset for the hash value.

property hash_xor_value_off: int#

Calculates the offset for the XOR value used in the hash.

property hash_data_off: int#

Calculates the offset for the hash data.

property hash_data_length_off: int#

Calculates the offset for the length of the hash data.

Returns:

The offset for the length of the hash data.

Return type:

int

property store_var_off: int#

Returns the offset of the storage variable.

Returns:

The offset of the storage variable.

Return type:

int

vars() → dict[str, int][source]#

Returns the offsets of each stack variable.

Returns:

A dictionary mapping variable names (A, B, C, etc.) to their offsets.

Return type:

dict[str, int]

property stack_vars: int#
property extra_vars: int#
class pairipcore.insn.InsnInfo[source]#

Represents the metadata and control flow information associated with a particular instruction in the VM.

__init__(vm: VM, insn_format: InsnFormat) → None[source]#
Parameters:
Return type:

None

property hash: int#

Returns the expected hash value for verification.

property hash_data_addr: addr_t#

Returns the memory address where the data to be hashed is located.

property hash_data_length: int#

Returns the length of the data to be hashed.

property xor_value_addr: addr_t#

Returns the memory address of the XOR value used in the hash calculation.

property fallback: addr_t#

Returns the address of the fallback instruction if the hash verification fails.

property next: addr_t#

Returns the address of the next instruction to execute if the hash verification succeeds.

class pairipcore.insn.Insn[source]#

Represents an instruction in the virtual machine, including its format, address, and associated metadata.

A: addr_t#
B: addr_t#
C: addr_t#
D: addr_t#
E: addr_t#
R: addr_t#

Address where the result of the instruction is stored.

__init__(vm: VM, insn_format: InsnFormat) → None[source]#
Parameters:
Return type:

None

property address: addr_t#

Returns the address of this instruction (excluding the opcode).

property opcode_address: addr_t#

Returns the address where the opcode for this instruction is located.

property insn_format: InsnFormat#

Returns the format of this instruction.

property info: InsnInfo#

Returns the metadata and control flow information associated with this instruction.

pairipcore.insn.O(name: str, opcode: int, format_id: str) → int[source]#

Registers an opcode with its corresponding format and name.

This function associates an opcode with a specific instruction format (represented by the format ID) and a mnemonic name. The format and name are stored in the FormatIDs and OpcodeIDs dictionaries, respectively.

Parameters:

  • name (str) – The mnemonic name of the opcode. If the name is "_", it will be auto-generated based on the format ID.

  • opcode (int) – The numeric opcode to be registered.

  • format_id (str) – The format ID string that describes the structure of the instruction.

Returns:

The opcode that was registered.

Return type:

int

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