These function attributes are supported by the RL78 back end:
interrupt ¶brk_interruptThese attributes indicate that the specified function is an interrupt handler. The compiler generates function entry and exit sequences suitable for use in an interrupt handler when this attribute is present.
Use brk_interrupt instead of interrupt for
handlers intended to be used with the BRK opcode (i.e. those
that must end with RETB instead of RETI).
naked ¶This attribute allows the compiler to construct the
requisite function declaration, while allowing the body of the
function to be assembly code. The specified function will not have
prologue/epilogue sequences generated by the compiler. Only basic
asm statements can safely be included in naked functions
(see Basic Asm — Assembler Instructions Without Operands). While using extended asm or a mixture of
basic asm and C code may appear to work, they cannot be
depended upon to work reliably and are not supported.