Re: [avr-gcc-list] Long prologue/epilogue sequences

[Joerg Wunsch]

In article <address@hidden> you write:

>Could someone point me the documentation that talks about the reason
>and/or possible solution to this?

When you call another function, you force the compiler into saving all
registers that are marked as callee-saved in the ABI, as the calling
function does not know what actual registers the called function might
destroy.

Just avoid calling other functions from a SIGNAL handler, or try to
force inlining of those functions (so the code analysis can determine
which registers need to be saved).
-- 
cheers, J"org               .-.-.   --... ...--   -.. .  DL8DTL

http://www.sax.de/~joerg/                        NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)