Index

GCSPOPCX

Guarded Control Stack Pop and Compare exception return record loads an exception return record from the location indicated by the current Guarded control stack pointer register, compares the loaded values with the current ELR_ELx, SPSR_ELx, and LR, and increments the pointer by the size of a Guarded control stack exception return record.

This is an alias of SYS. This means:

System
(FEAT_GCS)

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
1 1 0 1 0 1 0 1 0 0 0 0 1 0 0 0 0 1 1 1 0 1 1 1 1 0 1 Rt
L op1 CRn CRm op2

GCSPOPCX {<Xt>}

is equivalent to

SYS #0, C7, C7, #5{, <Xt>}

and is always the preferred disassembly.

Assembler Symbols

<Xt>

Is the 64-bit name of the optional general-purpose source register, defaulting to '11111', encoded in the "Rt" field.

Operation

The description of SYS gives the operational pseudocode for this instruction.