How to write to stderr/stdout of debuggee

[Konstantin Kharlamov via Gdb <gdb@sourceware.org>]

My usecase is I'm debugging some plugin written in Go, and I don't have
anything language related in the visibility scope to be able to write
to stderr/stdout. Though apparently gdb does see a `write` function
(which I presume is a C write function, not Go), but executing a

	p (int) write(2, "Hello", 6)

gives me a `syntax error in expression`. So anyway, I'm just wondering
if there's some built-in way to do that. I don't see a built-in $_write
function in gdb :(

P.S.: please keep me in CC, I'm not a list subscriber