Re: Various x86 syscall mechanisms

[Roland McGrath <roland@xxxxxxxxxx>]

> > [...] "int $0x80" for 32-bit
> > syscalls made from 64-bit tasks on CONFIG_IA32_EMULATION kernels (intended
> > for valgrind).
> 
> Hm, I think that's a post-facto rationalization.  

It was my recollection of something Andi had said about why it was there.
My recollections are not a reliable source of accurate information.

> Thanks for the clarifying overview.  I've been piecing my understanding 
> together as I've been getting 64-bit pvops Xen working, and trying to 
> fit what it has to do to implement all these instructions and mode 
> combinations, and it looks like I'm about right.

I'm always glad to help.


Thanks,
Roland
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/