# C -> WASM
WASI_ROOT := /opt/wasi-sdk
WASI_CC := ${WASI_ROOT}/bin/clang
WASI_CFLAGS := \
	--target=wasm32 \
	--sysroot=${WASI_ROOT}/share/wasi-sysroot \
	-z stack-size=4096 \
	-O0 \
	-nostdlib \
	-Wl,--no-entry \
	-Wl,--export-all \
	-Wl,--no-gc-sections \
	-Wl,--initial-memory=65536 \
	-Wl,--export=__heap_base \
	-Wl,--export=__data_end

# WASM -> Baremetal
WAMR := /opt/wamr

WAMRC := /opt/wamr-wamrc/wamrc
WAMRCFLAGS := \
	--target=i386 \
	--cpu=generic
XXD := busybox xxd

# NOTE: make build-sum: "error: bp cannot be used in ‘asm’ here"
#       could remove "ebp" from the clobber list (ARCH_ASM_CLOBBER_ALL) or
#       use the -fomit-frame-pointer flag to tell gcc it shouldn't rely on ebp for enter/leave...
CC := /opt/crosscompiler/bin/i686-elf-gcc
CFLAGS := \
	-I. \
	-O0 \
	-m32 \
	-ffunction-sections \
	-fomit-frame-pointer \
	-ggdb
IWASM_LIB := /opt/wamr-libiwasm # Baremetal
LDFLAGS = \
	-Wl,-T linker.ld \
	$^ \
	-Wl,--build-id=none \
	-static \
	-nostdlib \
	-m32 \
	-Wl,-rpath,${IWASM_LIB} \
	-L${IWASM_LIB} \
	-liwasm \
	-lc \
	-lgcc
INCL := \
	-I${WAMR}/core/iwasm/include \
	-I${WAMR}/core/shared/utils \
	-I${WAMR}/core/shared/platform/baremetal \
	-I/opt/crosscompiler/i686-elf/include

CC_LINUX := gcc
CFLAGS_LINUX := \
	-I. \
	-O0 \
	-m32 \
	-ffunction-sections \
	-ggdb
IWASM_LIB_LINUX := /opt/wamr-libiwasm-linux
LDFLAGS_LINUX = \
	$^ \
	-m32 \
	-Wl,-rpath,${IWASM_LIB_LINUX} \
	-L${IWASM_LIB_LINUX} \
	-liwasm \
	-lm
INCL_LINUX := \
	-I${WAMR}/core/iwasm/include \
	-I${WAMR}/core/shared/utils \
	-I${WAMR}/core/shared/platform/linux

################################################################
# C -> WASM
${BUILD_DIR}/%/module.wasm: %.c
	mkdir -p $(shell dirname $@)
	${WASI_CC} ${WASI_CFLAGS} $< -o $@

################################################################
# WASM -> Native Object File
# ${BUILD_DIR}/%/system.o: ${BUILD_DIR}/%/module.wasm
# 	${WAMRC} --target=i386 --format=object -o ${BUILD_DIR}/$*/system.o ${BUILD_DIR}/$*/module.wasm
#
# ${BUILD_DIR}/startup.o: arch/bochs/startup.s
# 	${CC} $< ${CFLAGS} -c -o $@
#
# ${BUILD_DIR}/%/system.elf: ${BUILD_DIR}/%/system.o ${BUILD_DIR}/startup.o
# 	${CC} ${LDFLAGS} -o $@

################################################################
# WASM -> AOT -> Loaded by Runtime (FAIL)
${BUILD_DIR}/%/module.aot: ${BUILD_DIR}/%/module.wasm
	${WAMRC} ${WAMRCFLAGS} -o $@ $<

${BUILD_DIR}/%/module_wasm.c: ${BUILD_DIR}/%/module.aot
	${XXD} -i $< > $@

${BUILD_DIR}/%/system.o: ${BUILD_DIR}/%/module_wasm.c
	cp embed/host.c ${BUILD_DIR}/$*/module_host.c
	sed -i \
	    -e "s/__WASM_ARRAY_FILE__/module_wasm.c/g" \
	    -e "s/__WASM_ARRAY__/build_bochs_$*_module_aot/g" \
	    -e "s/__WASM_ARRAY_LEN__/build_bochs_$*_module_aot_len/g" \
	    ${BUILD_DIR}/$*/module_host.c
	${CC} ${CFLAGS} ${INCL} -c ${BUILD_DIR}/$*/module_host.c -o $@

${BUILD_DIR}/startup.o: arch/bochs/startup.s
	${CC} $< ${CFLAGS} -c -o $@

${BUILD_DIR}/syscalls.o: syscalls.c
	${CC} $< ${CFLAGS} -c -o $@

${BUILD_DIR}/%/system.elf: ${BUILD_DIR}/%/system.o ${BUILD_DIR}/syscalls.o ${BUILD_DIR}/startup.o
	${CC} ${LDFLAGS} -o $@

################################################################
# WASM -> AOT -> Loaded by Runtime (Host/Linux)
${BUILD_DIR}/%/system-linux.o: ${BUILD_DIR}/%/module_wasm.c
	cp embed/host-linux.c ${BUILD_DIR}/$*/module_host-linux.c
	sed -i \
	    -e "s/__WASM_ARRAY_FILE__/module_wasm.c/g" \
	    -e "s/__WASM_ARRAY__/build_bochs_$*_module_aot/g" \
	    -e "s/__WASM_ARRAY_LEN__/build_bochs_$*_module_aot_len/g" \
	    ${BUILD_DIR}/$*/module_host-linux.c
	${CC_LINUX} ${CFLAGS_LINUX} ${INCL_LINUX} -c ${BUILD_DIR}/$*/module_host-linux.c -o $@

${BUILD_DIR}/%/system-linux.elf: ${BUILD_DIR}/%/system-linux.o
	${CC_LINUX} ${LDFLAGS_LINUX} -o $@

################################################################
# Bochs
${BUILD_DIR}/%/system.iso: ${BUILD_DIR}/%/system.elf
	rm -rf $(shell dirname $<)/grub
	mkdir -p $(shell dirname $<)/grub/boot/grub
	cp arch/bochs/grub.cfg $(shell dirname $<)/grub/boot/grub
	cp $< $(shell dirname $<)/grub/boot/system.elf
	grub-mkrescue -o $@ $(shell dirname $<)/grub

BOCHS_RUNNER_ARGS = \
	-V arch/bochs/vgabios.bin \
	-b arch/bochs/BIOS-bochs-latest \

# Don't depend on system.iso so we can run the trace target from the fail docker image that does not have any wamr/wasi stuff
# ${BUILD_DIR}/%/trace.pb: ${BUILD_DIR}/%/system.iso
${BUILD_DIR}/%/trace.pb:
	${BOCHS_RUNNER} ${BOCHS_RUNNER_ARGS} -1 \
	-f ${FAIL_TRACE} \
	-e ${BUILD_DIR}/$*/system.elf \
	-i ${BUILD_DIR}/$*/system.iso \
	-- \
	-Wf,--state-file=${BUILD_DIR}/state \
	-Wf,--trace-file=${BUILD_DIR}/trace.pb \
	-Wf,--start-symbol=start_trace \
	-Wf,--end-symbol=stop_trace \
	-Wf,--check-bounds

client-%:
	${BOCHS_RUNNER} ${BOCHS_RUNNER_ARGS} \
	-f ${FAIL_INJECT} \
	-e ${BUILD_DIR}/$(subst client-,,$@)/system.elf \
	-i ${BUILD_DIR}/$(subst client-,,$@)/system.iso \
	-j $(shell getconf _NPROCESSORS_ONLN) \
	-- \
	-Wf,--state-dir=${BUILD_DIR}/$(subst client-,,$@)/state \
	-Wf,--trap \
	-Wf,--timeout=10 \
	-Wf,--ok-marker=ok_marker \
	-Wf,--fail-marker=fail_marker \
	-Wf,--catch-write-textsegment \
	-Wf,--catch-outerspace \
	2>/dev/null | grep -B 2 -A 8 'INJECT'

inject-%:
	${BOCHS_RUNNER} ${BOCHS_RUNNER_ARGS} -1 \
	-f ${FAIL_INJECT} \
	-e ${BUILD_DIR}/$(subst inject-,,$@)/system.elf \
	-i ${BUILD_DIR}/$(subst inject-,,$@)/system.iso \
	-j 1 -- \
	-Wf,--state-dir=${BUILD_DIR}/$(subst inject-,,$@)/state \
	-Wf,--trap \
	-Wf,--timeout=10 \
	-Wf,--ok-marker=ok_marker \
	-Wf,--fail-marker=fail_marker \
	-Wf,--catch-write-textsegment \
	-Wf,--catch-outerspace

# TODO: Command line interface changed
import-arch-%: ${BUILD_DIR}/%/trace.pb ${HOME}/.my.cnf
	# ${FAIL_IMPORT} -v ${ARCH}/$(patsubst import-arch-%,%,$@) -b mem  -t $< -e $(shell dirname $<)/system.elf -i mem --memory-type ram
	# ${FAIL_IMPORT} -v ${ARCH}/$(patsubst import-arch-%,%,$@) -b regs-trace  -t $< -e $(shell dirname $<)/system.elf -i mem --memory-type register
	# ${FAIL_IMPORT} -v ${ARCH}/$(patsubst import-arch-%,%,$@) -b regs -t $< -e $(shell dirname $<)/system.elf -i regs
	# ${FAIL_IMPORT} -v ${ARCH}/$(patsubst import-arch-%,%,$@) -b ip   -t $< -e $(shell dirname $<)/system.elf -i regs --no-gp --ip
	# ${FAIL_PRUNE}  -v ${ARCH}/$(patsubst import-arch-%,%,$@) -b %% --overwrite
	${FAIL_IMPORT} -v ${ARCH}/$(patsubst import-arch-%,%,$@) -b mem  -t $< -e $(shell dirname $<)/system.elf -i MemoryImporter
	${FAIL_IMPORT} -v ${ARCH}/$(patsubst import-arch-%,%,$@) -b regs-trace  -t $< -e $(shell dirname $<)/system.elf -i MemoryImporter
	${FAIL_IMPORT} -v ${ARCH}/$(patsubst import-arch-%,%,$@) -b regs -t $< -e $(shell dirname $<)/system.elf -i RegisterImporter
	${FAIL_IMPORT} -v ${ARCH}/$(patsubst import-arch-%,%,$@) -b ip   -t $< -e $(shell dirname $<)/system.elf -i RegisterImporter --no-gp --ip
	${FAIL_PRUNE}  -v ${ARCH}/$(patsubst import-arch-%,%,$@) -b %% --overwrite

define arch-make-targets

build-$1: ${BUILD_DIR}/$1/system.iso

trace-$1: ${BUILD_DIR}/$1/trace.pb

objdump-$1:
	objdump --disassemble --disassembler-options intel --disassembler-color=off --source ${BUILD_DIR}/$1/system.elf | less

linux-build-$1: ${BUILD_DIR}/$1/system-linux.elf

linux-run-$1: ${BUILD_DIR}/$1/system-linux.elf
	${BUILD_DIR}/$1/system-linux.elf

linux-gdb-$1: ${BUILD_DIR}/$1/system-linux.elf
	gdb --tui ${BUILD_DIR}/$1/system-linux.elf

bochs-run-$1: ${BUILD_DIR}/$1/system.iso
	bochs -q -f arch/bochs/bochsrc-docker.txt

endef