X86 machine code enter and FreeBSD kernel

[gerarra at tin.it]

>I received no reply on this question at questions mailing list, so I try
>
>asking this here. Hope I'm not asking this in completely wrong list.
>
>In recent discussion in OpenWatcom lists it was noticed that at least
>certain addressing modes of assembler ENTER instruction causes a crash
>when used in Linux. GCC circumnavigates this by not emitting ENTER
>instructions in machine code. Linus's comment on the above issue can be
>found on:
>
>http://groups.google.co.nz/groups?selm=7i86ni%24b7n%241%40palladium.transmeta.com
>
>What's the status of the above "feature" in FreeBSD, does the kernel 
>support the
>whole x86 instruction set without similar cut corners?
>
>-Reko

Mainly, I think gcc sets stack by hands beacause ENTER does a lot of dirty
work. If you see x86 pseudocode, it perform a lot of wasting work... however,
what you proposed is not a bug, just a way of ruling stack frames.

rookie