3.10 Directive OPTION FRAME

This option affects 64-bit only. It allows to make JWasm automatically generate prologues and epilogues for procedures with the FRAME attribute. Thus the code complies to the rules of Win64 SEH (Structured Exception Handling). Syntax is

OPTION FRAME:<AUTO | NOAUTO>

AUTO will enable this feature, NOAUTO (which is default) disables it.

The unwind information which is generated is "complete", that is, it contains the ".endprologue" pseudo-op already. To allow to save all non-volatile registers in the prologue, the "USES" phrase is more capable in this mode and will accept XMM registers to be saved and restored.