#
# This file and its contents are supplied under the terms of the
# Common Development and Distribution License ("CDDL"), version 1.0.
# You may only use this file in accordance with the terms of version
# 1.0 of the CDDL.
#
# A full copy of the text of the CDDL should have accompanied this
# source.  A copy of the CDDL is also available via the Internet at
# http://www.illumos.org/license/CDDL.
#

#
# Copyright 2016 Joyent, Inc.
# Copyright 2021 Oxide Computer Company
#

#
# This Makefile should be included in individual kernel modules to opt
# into a -z defs world. Note, this should be included after a MAPFILES
# entry is defined. See uts/common/README.mapfiles for more information.
#

#
# Mapfile base
#
MAPBASE = $(UTSBASE)/common/mapfiles
DTRACE_MAPFILE = $(OBJS_DIR)/dtrace.mapfile

#
# Always append -z defs to the LD FLAGS and append all mapfiles.
#
LDFLAGS += -z defs $(MAPFILES:%=-M $(MAPBASE)/%.mapfile) -M $(DTRACE_MAPFILE)

#
# Definitions and rules to assemble the DTrace probe mapfile. There's no
# good way to automatically do this, hence we have a slightly gross
# series of automated tools. This does mean that we have a bit more work
# to do, but also means that probes can be added arbitrarily without
# having to manually edit mapfiles.
#
DTRACE_AWK_FILE = $(MAPBASE)/dtrace.mapfile.awk

$(OBJS_DIR)/dtrace.mapfile: $(OBJECTS) $(DTRACE_AWK_FILE)
	$(NM) -u $(OBJECTS) | $(AWK) -f $(DTRACE_AWK_FILE) > $@

#
# Make sure that we don't leave behind the DTrace related mapfiles.
#
CLEANFILES += $(DTRACE_MAPFILE)