PLCALL

Operation

Materializes an authenticated long-return record and transfers to a new CS:PC.

Assembler Syntax

PLCALL Rn(r), <ea>(e)

PLCALL Rn(s), Rn(d)

Privilege

Unprivileged

Required CPUID flags

CFI

PLCALL requires a configured CFI key and writes a 24-byte long-return record containing the continuation PC, continuation CS, and nonzero PA at offsets zero, eight, and 16. The PA binds both continuation values to the post-allocation SS:SP in a domain distinct from protected near returns.

2.75in

Encodings

PLCALL Rn(r), <ea>(e)

Format: Instruction format for PLCALL Rn(r), <ea>(e)

2.75in PLCALL Rn(s), Rn(d)

Format: Instruction format for PLCALL Rn(s), Rn(d)