[shub]

I had cause to consult a syscall table (not this one, a correct one, forget where I found it) when doing something or other with fasm. fasm's macros are pretty dang advanced...I remember having argument length checking and rudimentary type checking as well. Then I got done yak shaving and remembered that programming in asm sucks.

But yeah, it's for writing your own syscall wrappers. Something not exported by libc, or more likely if you're not using libc.