[avr-gcc-list] Avoid register saving

[Bernhard Huber]

Hi,

How can I tell avr-gcc (gcc version 3.0 20010605 (prerelease)) that a
bunch of registers (r2 to r16) must not be saved when entering a
interrupt service routine.

The ISR is coded in C and not in assembler, and I don´t want to use the
__attribute__ (naked) to prevent the compiler creating prologue and
epilogue.

The command line option -ffixed seems not to be the right one.

Any ideas?

Regards,
Bernhard





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