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SMC

Secure Monitor Call.

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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