#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License (the "License").
# You may not use this file except in compliance with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or http://www.opensolaris.org/os/licensing.
# See the License for the specific language governing permissions
# and limitations under the License.
#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END
#
#
# Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.
#
# Copyright (c) 2013 by Delphix. All rights reserved.
#

.KEEP_STATE:
.SUFFIXES:

include $(SRC)/cmd/mdb/Makefile.tools

$(KMOD_SOURCES_DIFFERENT)KMODSRCS = $(MODSRCS)

MODOBJS = $(MODSRCS:%.c=dmod/%.o)
KMODOBJS = $(KMODSRCS:%.c=kmod/%.o)

MODNAME = $(MODULE:%.so=%)
KMODULE = $(MODNAME)

MODFILE = dmod/$(MODULE)
KMODFILE = kmod/$(KMODULE)

#
# The mess below is designed to pick the right set of objects to build and/or
# lint.  We have three flavors:
#
#  1. proc and raw modules.  Only $(MODOBJS) are built.
#  2. kvm modules for systems without kmdb.  Only $(MODOBJS) are built.
#  3. kvm modules for systems with kmdb.  $(MODOBJS) and $(KMODOBJS) are built.
#
# Complicating matters, we'd like to make the distinction between 2 and 3 before
# this Makefile is loaded.  By default, we'll assume that all kvm modules should
# be built for kmdb.  If, however, the user sets $(MODULE_BUILD_TYPE) to `mdb',
# the kmdb variant of the module won't be built.
#

# Which flavors are to be built?
TARGETS_kvm_type_	= both	# Build both if $(MODULE_BUILD_TYPE) is unset
TARGETS_kvm_type_kmdb	= both
TARGETS_kvm_type_mdb	= mdb
TARGETS_kvm_type	= $(TARGETS_kvm_type_$(MODULE_BUILD_TYPE))

# What should we build?
TARGETS_kvm_kmdb	= $(KMODFILE)
TARGETS_kvm_mdb		= $(MODFILE)
TARGETS_kvm_both	= $(TARGETS_kvm_mdb) $(TARGETS_kvm_kmdb)
TARGETS_kvm		= $(TARGETS_kvm_$(TARGETS_kvm_type))
TARGETS_proc		= $(MODFILE)
TARGETS_raw		= $(MODFILE)
TARGETS			= $(TARGETS_$(MDBTGT))

# Where should we install that which we've built?
ROOTTGTS_kvm_type	= $(TARGETS_kvm_type)	# overridden by mdb_ks
ROOTTGTS_kvm_kmdb	= $(ROOTKMOD)/$(KMODULE)
ROOTTGTS_kvm_mdb	= $(ROOTMOD)/$(MODULE)
ROOTTGTS_kvm_both	= $(ROOTTGTS_kvm_mdb) $(ROOTTGTS_kvm_kmdb)
ROOTTGTS_kvm		= $(ROOTTGTS_kvm_$(ROOTTGTS_kvm_type))
ROOTTGTS_proc		= $(ROOTMOD)/$(MODULE)
ROOTTGTS_raw		= $(ROOTMOD)/$(MODULE)
ROOTTGTS		= $(ROOTTGTS_$(MDBTGT))

# What should we lint?
KLINTOBJS		= $(KMODOBJS:%.o=%.ln)
LINTOBJS		= $(MODOBJS:%.o=%.ln)

LINTFILES_kvm_type	= $(TARGETS_kvm_type)
LINTFILES_kvm_both	= $(KLINTOBJS) $(LINTOBJS)
LINTFILES_kvm_mdb	= $(LINTOBJS)
LINTFILES_kvm		= $(LINTFILES_kvm_$(LINTFILES_kvm_type))
LINTFILES_proc		= $(LINTOBJS)
LINTFILES_raw		= $(LINTOBJS)
LINTFILES		= $(LINTFILES_$(MDBTGT))

kvm_TGTFLAGS		= -D_KERNEL
proc_TGTFLAGS		= -D_USER

C99MODE			= $(C99_ENABLE)

CFLAGS			+= $(CCVERBOSE)
CFLAGS64		+= $(CCVERBOSE)
CPPFLAGS		+= $($(MDBTGT)_TGTFLAGS) -I../../../common
LDFLAGS			+= $(ZTEXT)
LDFLAGS64		+= $(ZTEXT)

# Module type-specific compiler flags
$(MODOBJS) :=			CFLAGS += $(C_BIGPICFLAGS) $(XREGSFLAG)
$(MODOBJS) :=			CFLAGS64 += $(C_BIGPICFLAGS) $(XREGSFLAG)
$(KMODOBJS) $(KLINTOBJS) :=	CPPFLAGS += -D_KMDB
$(KMODOBJS) :=			V9CODESIZE = $(CCABS32)
$(KMODOBJS) :=			DTS_ERRNO =

# Modules aren't allowed to export symbols
MAPFILE		= $(SRC)/cmd/mdb/common/modules/conf/mapfile

# Modules typically make external references.  To provide for -zdefs use
# and clean ldd(1) processing, explicitly define all external references.
MAPFILE-EXT	= $(SRC)/cmd/mdb/common/modules/conf/mapfile-extern

#
# kmdb is a kernel module, so we'll use the kernel's build flags.
$(KMODOBJS) := CFLAGS += $(STAND_FLAGS_32)
$(KMODOBJS) := CFLAGS64 += $(STAND_FLAGS_64)

#
# Override this to pull source files from another directory
#
MODSRCS_DIR = ../../../common/modules/genunix

all: $$(TARGETS)

install: all $$(ROOTTGTS)

dmods: install

clean.lint:
	$(RM) $(LINTFILES) $(MODSRCS:.c=.ln)

clean:
	$(RM) $(MODOBJS) $(KMODOBJS) $(CLEANFILES)

clobber: clean clean.lint
	$(RM) $(MODFILE) $(KMODFILE) $(CLOBBERFILES)

lint: $$(LINTFILES)

.NO_PARALLEL:
.PARALLEL: $(MODOBJS) $(KMODOBJS) mdb_tgt kmdb_tgt dmod kmod \
	$(TARGETS) $(LINTFILES)

$(MODFILE): dmod .WAIT $(MODOBJS) $$(MAPFILE-EXT)
	$(LINK.c) $(ZDEFS) $(ZIGNORE) $(MAPFILE-EXT:%=-M%) $(GSHARED) \
	    $(MODOBJS) -o $@ $(LDLIBS) -lc
	$(CTFMERGE) -L VERSION -o $@ $(MODOBJS)
	$(POST_PROCESS_SO)

#
# kmdb dmods must *not* stray from the module API.  To ensure that they don't,
# we try to link them, at build time, against an object that exports the symbols
# that they can legally use.  The link test object is, however, only built when
# kmdb itself is built.  Requiring module developers to build kmdb first would
# be painful, so by default, module-level builds don't do the link test (the
# $(POUND_SIGN) assignment below takes care of that).  Builds of the entire
# tree can, however, guarantee the construction of kmdb first, and as such can
# override the setting of $(KMDB_LINKTEST_ENABLE).  This override causes the
# link test to be run.
#
# Developers wanting to force a link test for a single module can use the
# `linktest' target from within a module directory.
#
LINKTESTOBJ = $(KMDBDIR)/kmdb_modlinktest.o

KMDB_LINKTEST = \
	$(LD) $(ZDEFS) -dy -r -o $@.linktest $(KMODOBJS) \
	$(STANDOBJS) $(LINKTESTOBJ) && \
	$(RM) $@.linktest

KMDB_LINKTEST_ENABLE=$(POUND_SIGN)
$(KMDB_LINKTEST_ENABLE)KMDB_LINKTEST_CMD = $(KMDB_LINKTEST)

#
# Ensure that dmods don't use floating point
#
KMDB_FPTEST_CMD = $(KMDB_FPTEST)

$(KMODFILE): kmod .WAIT $(KMODOBJS) $(MAPFILE)
	$(LD) -dy -r $(MAPFILE:%=-M%) -Nmisc/kmdbmod -o $@ $(KMODOBJS) \
	$(STANDOBJS)
	$(KMDB_LINKTEST_CMD)
	$(KMDB_FPTEST_CMD)
	$(CTFMERGE) -f -L VERSION -o $@ $(KMODOBJS)
	$(POST_PROCESS)
	$(SETDYNFLAG) -f DF_1_NOKSYMS $@

linktest: linktest_check .WAIT kmod .WAIT $(KMODOBJS)
	$(KMDB_LINKTEST)

linktest_check:
	@if [ "$(MDBTGT)" != "kvm" ] ; then \
		echo "ERROR: linktest is not supported non-kvm/disasm dmods" \
		    >&2 ; \
		exit 1 ; \
	fi

#
# Dynamic rules for object construction
#
dmod/%.o kmod/%.o: %.c
	$(COMPILE.c) -o $@ $<
	$(CTFCONVERT_O)

dmod/%.o kmod/%.o: ../%.c
	$(COMPILE.c) -o $@ $<
	$(CTFCONVERT_O)

dmod/%.o kmod/%.o: ../../../common/modules/$(MODNAME)/%.c
	$(COMPILE.c) -o $@ $<
	$(CTFCONVERT_O)

dmod/%.o kmod/%.o: $$(MODSRCS_DIR)/%.c
	$(COMPILE.c) -o $@ $<
	$(CTFCONVERT_O)

#
# Lint
#
dmod/%.ln kmod/%.ln: %.c
	$(LINT.c) -dirout=$(@D) -c $<

dmod/%.ln kmod/%.ln: ../%.c
	$(LINT.c) -dirout=$(@D) -c $<

dmod/%.ln kmod/%.ln: ../../../common/modules/$(MODNAME)/%.c
	$(LINT.c) -dirout=$(@D) -c $<

dmod/%.ln kmod/%.ln: $$(MODSRCS_DIR)/%.c
	$(LINT.c) -dirout=$(@D) -c $<

#
# Installation targets
#

$(ROOT)/usr/lib/mdb/$(MDBTGT): $(ROOT)/usr/lib/mdb
	$(INS.dir)

$(ROOT)/usr/lib/mdb:
	$(INS.dir)

$(ROOT)/kernel/kmdb:
	$(INS.dir)

$(ROOTMOD)/$(MODULE): $(ROOTMOD)

$(ROOTKMOD)/$(KMODULE): $(ROOTKMOD)

kmod dmod:
	-@mkdir -p $@