tag	line	file	source code
COPY_SEG	232	kernel/signal.c	COPY_SEG(ds);
COPY_SEG	233	kernel/signal.c	COPY_SEG(es);
COPY_SEG	234	kernel/signal.c	COPY_SEG(fs);
COPY_SEG	235	kernel/signal.c	COPY_SEG(gs);