######## SGX SDK Settings ########

SGX_SDK ?= /opt/sgxsdk
SGX_MODE ?= HW
SGX_ARCH ?= x64
SGX_DEBUG ?= 1

ifeq ($(shell getconf LONG_BIT), 32)
	SGX_ARCH := x86
else ifeq ($(findstring -m32, $(CXXFLAGS)), -m32)
	SGX_ARCH := x86
endif

ifeq ($(SGX_ARCH), x86)
	SGX_COMMON_CFLAGS := -m32
	SGX_LIBRARY_PATH := $(SGX_SDK)/lib
	SGX_ENCLAVE_SIGNER := $(SGX_SDK)/bin/x86/sgx_sign
	SGX_EDGER8R := $(SGX_SDK)/bin/x86/sgx_edger8r
else
	SGX_COMMON_CFLAGS := -m64
	SGX_LIBRARY_PATH := $(SGX_SDK)/lib64
	SGX_ENCLAVE_SIGNER := $(SGX_SDK)/bin/x64/sgx_sign
	SGX_EDGER8R := $(SGX_SDK)/bin/x64/sgx_edger8r
endif

ifeq ($(SGX_DEBUG), 1)
ifeq ($(SGX_PRERELEASE), 1)
$(error Cannot set SGX_DEBUG and SGX_PRERELEASE at the same time!!)
endif
endif


ifeq ($(SGX_DEBUG), 1)
	SGX_COMMON_CFLAGS += -O0 -g
else
	SGX_COMMON_CFLAGS += -O0 -g
endif

######## CUSTOM Settings ########

CUSTOM_LIBRARY_PATH := ./lib
CUSTOM_BIN_PATH := ./bin
CUSTOM_EDL_PATH := ../edl
CUSTOM_COMMON_PATH := ../common

######## EDL Settings ########

Enclave_EDL_Files := enclave/Enclave_t.c enclave/Enclave_t.h app/Enclave_u.c app/Enclave_u.h

######## APP Settings ########

App_Rust_Flags := 
App_SRC_Files := $(shell find app/ -type f -name '*.rs') $(shell find app/ -type f -name 'Cargo.toml')
App_Include_Paths := -I ./app -I./include -I$(SGX_SDK)/include -I$(CUSTOM_EDL_PATH) -I/usr/include
App_C_Flags := $(SGX_COMMON_CFLAGS) -fPIC -Wno-attributes $(App_Include_Paths)

App_Rust_Path := ./app/target/debug
App_Enclave_u_Object := app/libEnclave_u.a
App_Name := bin/run-tests

######## Enclave Settings ########

ifneq ($(SGX_MODE), HW)
	Trts_Library_Name := sgx_trts_sim
	Service_Library_Name := sgx_tservice_sim
else
	Trts_Library_Name := sgx_trts
	Service_Library_Name := sgx_tservice
endif
Crypto_Library_Name := sgx_tcrypto
KeyExchange_Library_Name := sgx_tkey_exchange
ProtectedFs_Library_Name := sgx_tprotected_fs

RustEnclave_C_Files := $(wildcard ./enclave/*.c)
RustEnclave_C_Objects := $(RustEnclave_C_Files:.c=.o)
RustEnclave_Include_Paths := -I$(CUSTOM_COMMON_PATH)/inc \
	-I$(CUSTOM_EDL_PATH) -I$(SGX_SDK)/include -I$(SGX_SDK)/include/tlibc \
	-I$(SGX_SDK)/include/stlport -I$(SGX_SDK)/include/epid -I ./enclave -I./include

RustEnclave_Link_Libs := -L$(CUSTOM_LIBRARY_PATH) -lrun_tests_enclave
RustEnclave_Compile_Flags := $(SGX_COMMON_CFLAGS) -nostdinc -fvisibility=hidden -fpie -fstack-protector $(RustEnclave_Include_Paths)
RustEnclave_Link_Flags := $(SGX_COMMON_CFLAGS) -Wl,--no-undefined -nostdlib -nodefaultlibs -nostartfiles -L$(SGX_LIBRARY_PATH) \
	-Wl,--whole-archive -l$(Trts_Library_Name) -l$(Service_Library_Name) -Wl,--no-whole-archive \
	-Wl,--start-group -lsgx_tcxx -lsgx_tstdc -l$(Crypto_Library_Name) $(RustEnclave_Link_Libs) -Wl,--end-group \
	-Wl,-Bstatic -Wl,-Bsymbolic -Wl,--no-undefined \
	-Wl,-pie,-eenclave_entry -Wl,--export-dynamic  \
	-Wl,--defsym,__ImageBase=0 \
	-Wl,--gc-sections \
	-Wl,--version-script=enclave/Enclave.lds

RustEnclave_Name := enclave/enclave.so
Signed_RustEnclave_Name := bin/enclave.signed.so

.PHONY: all
all: $(App_Name) $(Signed_RustEnclave_Name)

######## EDL Objects ########

$(Enclave_EDL_Files): $(SGX_EDGER8R) enclave/Enclave.edl
	$(SGX_EDGER8R) --trusted enclave/Enclave.edl --search-path $(SGX_SDK)/include --search-path $(CUSTOM_EDL_PATH) --trusted-dir enclave
	$(SGX_EDGER8R) --untrusted enclave/Enclave.edl --search-path $(SGX_SDK)/include --search-path $(CUSTOM_EDL_PATH) --untrusted-dir app
	@echo "GEN  =>  $(Enclave_EDL_Files)"

######## App Objects ########

app/Enclave_u.o: $(Enclave_EDL_Files)
	@$(CC) $(App_C_Flags) -c app/Enclave_u.c -o $@
	@echo "CC   <=  $<"

$(App_Enclave_u_Object): app/Enclave_u.o
	$(AR) rcsD $@ $^
	cp $(App_Enclave_u_Object) ./lib

$(App_Name): $(App_Enclave_u_Object) $(App_SRC_Files)
	@cd app && SGX_SDK=$(SGX_SDK) cargo build $(App_Rust_Flags)
	@echo "Cargo  =>  $@"
	cp $(App_Rust_Path)/run-tests ./bin

######## Enclave Objects ########

enclave/Enclave_t.o: $(Enclave_EDL_Files)
	@$(CC) $(RustEnclave_Compile_Flags) -c enclave/Enclave_t.c -o $@
	@echo "CC   <=  $<"

$(RustEnclave_Name): enclave enclave/Enclave_t.o
	@$(CXX) enclave/Enclave_t.o -o $@ $(RustEnclave_Link_Flags)
	@echo "LINK =>  $@"

$(Signed_RustEnclave_Name): $(RustEnclave_Name)
	@$(SGX_ENCLAVE_SIGNER) sign -key ./enclave/Enclave_private.pem -enclave $(RustEnclave_Name) -out $@ -config enclave/Enclave.config.xml
	@echo "SIGN =>  $@"

run: all
	@( cd bin && ./run-tests )

.PHONY: enclave
enclave:
	$(MAKE) -C ./enclave/

.PHONY: clean
clean:
	@rm -f $(App_Name) $(RustEnclave_Name) $(Signed_RustEnclave_Name) enclave/*_t.* app/*_u.* lib/*.a
	@cd enclave && cargo clean && rm -f Cargo.lock
	@cd app && cargo clean && rm -f Cargo.lock