Re: The time has come for a kernel interfacing library layer

[David Xu <davidxu@xxxxxxxxxxx>]

Matthew Dillon wrote:
> :Do you mean kernel will directly write errno into userland memory?
> :
>
>     No, what I'm working on is a system call 'library' layer which is
>     intended to be part of libc without actually being part of libc.
>     The way it will work is that libc will declare a special code section
>     (whether dynamic or statically linked) which the kernel will recognize
>     and remap/override.  In the best case libc's code section will simply
>     be a BSS section (not take up any space in the filesystem).
Linux 2.6 seems did this in similar way, I can not remember if they
put the section at fixed address or not, but kernel will select best
syscall interface, and copy the syscall code into the pages. ;-)

David Xu