jose gomez valcarcel <jcgv33@xxxxxxxx> writes: > I just read x86_64 ABI code generation, and the result is ok. The > struct is returned in registers RAX, RDX. The only disappointing thing > is the allocation of 40 stack bytes, whic apparently is not used. This > effect cause my kernel code not to mix well with hand-assembler code. That is a good question. I think it is a bug. Although I'm curious as to why allocating extra unused stack space is a problem for your kernel code. Some stack space will always be used, because the x86_64 ABI requires the stack to be aligned on a 16-byte boundary before executing a call instruction. Ian
