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AIX Version 4.3 Assembler Language Reference

sc (System Call) Instruction


Calls the system to provide a service.

Note: The sc instruction is supported only in the PowerPC architecture.





The sc instruction causes a system call interrupt. The effective address (EA) of the instruction following the sc instruction is placed into the Save Restore Register 0 (SRR0). Bits 0, 5-9, and 16-31 of the Machine State Register (MSR) are placed into the corresponding bits of Save Restore Register 1 (SRR1). Bits 1-4 and 10-15 of SRR1 are set to undefined values.

The sc instruction has one syntax form. The syntax form does not affect the Machine State Register.

Note: The sc instruction has the same op code as the svc (Supervisor Call) instruction.

Related Information

The svc (Supervisor Call) instruction.

Branch Processor.

System Call Instructions.

Functional Differences for POWER and PowerPC Instructions.

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