The GCSSS1 characteristics are:
Validates that the stack being switched to contains a Valid cap entry, stores an In-progress cap entry on to the stack that is getting switched to and sets the current Guarded Control Stack Pointer to the stack that is getting switched to.
This instruction is present only when FEAT_GCS is implemented. Otherwise, direct accesses to GCSSS1 are UNDEFINED.
GCSSS1 is a 64-bit System instruction.
63 | 62 | 61 | 60 | 59 | 58 | 57 | 56 | 55 | 54 | 53 | 52 | 51 | 50 | 49 | 48 | 47 | 46 | 45 | 44 | 43 | 42 | 41 | 40 | 39 | 38 | 37 | 36 | 35 | 34 | 33 | 32 |
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 |
Input address, for the incoming Guarded Control Stack | |||||||||||||||||||||||||||||||
Input address, for the incoming Guarded Control Stack |
Input address, for the incoming Guarded Control Stack.
Accesses to this instruction use the following encodings in the System instruction encoding space:
op0 | op1 | CRn | CRm | op2 |
---|---|---|---|---|
0b01 | 0b011 | 0b0111 | 0b0111 | 0b010 |
if PSTATE.EL == EL0 then GCSSS1(X[t, 64]); elsif PSTATE.EL == EL1 then GCSSS1(X[t, 64]); elsif PSTATE.EL == EL2 then GCSSS1(X[t, 64]); elsif PSTATE.EL == EL3 then GCSSS1(X[t, 64]);
26/03/2024 09:49; 67c0ae5282a7629ba0ea0ba7267b43cd4f7939f6
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