These function attributes are supported by the RL78 back end:
These 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.
brk_interrupt instead of
handlers intended to be used with the
BRK opcode (i.e. those
that must end with
RETB instead of
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). While using extended
asm or a mixture of
asm and C code may appear to work, they cannot be
depended upon to work reliably and are not supported.