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#
# 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 2022 Oxide Computer Company

PAYLOAD_CLEANFILES =	payload_start.o	\
		$(PAYLOADS:%=payload_%)		\
		$(PAYLOADS:%=payload_%.o)		\
		$(PAYLOADS:%=pobj_%.o)		\
		$(PAYLOADS:%=pobj_%.s)

# Hammerhead: Set AS_CPPFLAGS globally (not just target-specific) so the
# built-in %.o: %.S rule also gets the include path
AS_CPPFLAGS += -I../common
# Without a real runtime in the payload, the stack protector must be disabled
# Hammerhead: Use colon (not :=) for target-specific variables in GNU Make.
# dmake's := is conditional assignment, but GNU Make's := is simple expansion
# which silently creates a regular variable instead of a target-specific one.
$(PAYLOADS:%=payload_%.o): STACKPROTECT = none
# Like our own kernel, prevent the compiler from using the FPU via SIMD
$(PAYLOADS:%=payload_%.o): CFLAGS64 += $(STAND_FLAGS_64)

payload_%: payload_start.o payload_%.o
	$(LD) -dn -e _start -M ../common/Mapfile.payload -o $@ $^

pobj_%.s: payload_%
	@echo " .data"                                  > $@
	@echo " .globl payload_data"                    >> $@
	@echo "payload_data:"                           >> $@
	$(ELFEXTRACT) $^                                >> $@
	@echo " .size  payload_data, [.-payload_data]"  >> $@
	@echo " .align 4"                               >> $@
	@echo " .globl payload_size"                    >> $@
	@echo " .size payload_size, 4"                  >> $@
	@echo "payload_size:"                           >> $@
	@echo " .data"                                  >> $@
	@echo " .long  [.-payload_data]"                >> $@

pobj_%.o: pobj_%.s
	$(COMPILE.s) -o $@ $^
	$(POST_PROCESS)

%.o: ../common/%.S
	$(COMPILE.s) -o $@ $^
	$(POST_PROCESS)

%.o: ../common/%.c
	$(COMPILE.c) -o $@ $^
	$(POST_PROCESS)