Parameters store on stack is preserved across function call or volatile in ABI of intel386 & amd64?

[remcl]

Hi

Is the parameters stored on the stack preserved across 

function calls or volatile in the ABI of intel386 & amd64?

I think the answer should be 'volatile' but couldn't 

found any description about it in the specifications of 

Sys V ABI intel386 & amd64.

Thanks a lot.