xpaclri

Strip PAC from Instruction Address

XPACLRI

Removes the pointer authentication code from an instruction address.

Pseudocode Operation

LR ← StripPAC(LR)

Encoding

Binary Layout

11010101000000110010

31:12

0000

11:8

111

7:5

11111

4:0

 

Format System

Opcode 0xD50320FF

Extension PAC (Security)

Operands

Related

More in PAC (Security)

Reference

View in Arm A64 ISA Reference ↗ Arm A64 ISA

Instruction Forms

Encoding	Instruction		ISA		Bit pattern
0xD50320FF	XPACLRI		A64		11010101000000110010 | 0000 | 111 | 11111

Description

Strip Pointer Authentication Code. This instruction removes the pointer authentication code from an address. The address is in the specified general-purpose register for XPACI and XPACD, and is in LR for XPACLRI. The XPACD instruction is used for data addresses, and XPACI and XPACLRI are used for instruction addresses.

Operation

if IsFeatureImplemented(FEAT_PAuth) then
    X[d, 64] = Strip(X[d, 64], data);