11.111 SMC

Secure Monitor Call.

Syntax

SMC{cond} #imm4

where:

cond

is an optional condition code.

imm4

is a 4-bit immediate value. This is ignored by the ARM processor, but can be used by the SMC exception handler to determine what service is being requested.

Note:

SMC was called SMI in earlier versions of the ARM assembly language. SMI instructions disassemble to SMC, with a comment to say that this was formerly SMI.

Architectures

This ARM instruction is available in implementations of ARMv6 and above, if they have the Security Extensions.

This 32-bit Thumb instruction is available in implementations of ARMv6T2 and above, if they have the Security Extensions.

There is no 16-bit version of this instruction in Thumb.

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