Followup to: <3A8108F8.2476.21D0F5@localhost>
By author: "Ulrich Windl" <[EMAIL PROTECTED]>
In newsgroup: linux.dev.kernel
>
> You'll notice that %edx is not pushed at the start of the function.
> Unless the caller saves that, edx will be spilled. Depending on the
> level of optimization this can be bad. Am I wrong?
>
Yes. %eax, %edx and %ecx are defined as caller-saved registers. Each
function is free to clobber them at will.
Now, if you saw the same for %ebx, %ebp, %esi or %edi, that would be
bad.
-hpa
--
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"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt
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