GCSPUSHM

Decrements the current Guarded Control Stack Pointer register by the size of a Guarded Control Stack procedure return record and stores an entry to the Guarded Control Stack.

Configuration

This instruction is present only when FEAT_GCS is implemented. Otherwise, direct accesses to GCSPUSHM are UNDEFINED.

Attributes

Field descriptions

Bits [63:0]

Executing GCSPUSHM

Accesses to this instruction use the following encodings in the System instruction encoding space:

GCSPUSHM <Xt>

op0	op1	CRn	CRm	op2
0b01	0b011	0b0111	0b0111	0b000

if PSTATE.EL == EL0 then if (!EL2Enabled() || HCR_EL2.TGE != '1') && GCSCRE0_EL1.PUSHMEn == '0' then AArch64.SystemAccessTrap(EL1, 0x18); elsif EL2Enabled() && HCR_EL2.TGE == '1' && GCSCRE0_EL1.PUSHMEn == '0' then AArch64.SystemAccessTrap(EL2, 0x18); else GCSPUSHM(X[t, 64]); elsif PSTATE.EL == EL1 then if GCSCR_EL1.PUSHMEn == '0' then AArch64.SystemAccessTrap(EL1, 0x18); elsif EL2Enabled() && IsFeatureImplemented(FEAT_FGT) && (!HaveEL(EL3) || SCR_EL3.FGTEn == '1') && HFGITR_EL2.nGCSPUSHM_EL1 == '0' then AArch64.SystemAccessTrap(EL2, 0x18); else GCSPUSHM(X[t, 64]); elsif PSTATE.EL == EL2 then if GCSCR_EL2.PUSHMEn == '0' then AArch64.SystemAccessTrap(EL2, 0x18); else GCSPUSHM(X[t, 64]); elsif PSTATE.EL == EL3 then if GCSCR_EL3.PUSHMEn == '0' then AArch64.SystemAccessTrap(EL3, 0x18); else GCSPUSHM(X[t, 64]);

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 for Guarded Control Stack procedure return record
input for Guarded Control Stack procedure return record