PWD:=$(shell pwd)/
ROOT:=$(shell realpath $(PWD)../../../../..)/
BUILD_DIR:=$(PWD)build/

AFLPP_DRIVER_HOOK_SRC=$(PWD)aflpp_qemu_driver_hook.c
AFLPP_DRIVER_HOOK_OBJ=$(BUILD_DIR)aflpp_qemu_driver_hook.so

CFLAGS+=-O3 \
		-funroll-loops \
		-g \
		-fPIC \
		-funroll-loops \

LDFLAGS+=-shared \

TEST_BIN:=$(PWD)../../build/test
TEST_DATA_DIR:=../../build/libpng/libpng-1.2.56/contrib/pngsuite/

AFLPP_DRIVER_DUMMY_INPUT:=$(BUILD_DIR)in
QEMU_OUT:=$(BUILD_DIR)qemu-out
FRIDA_OUT:=$(BUILD_DIR)frida-out

ifndef ARCH

ARCH=$(shell uname -m)
ifeq "$(ARCH)" "aarch64"
 ARCH:=arm64
endif

ifeq "$(ARCH)" "i686"
 ARCH:=x86
endif
endif

AFL_QEMU_PERSISTENT_ADDR=$(shell $(PWD)../get_symbol_addr.py -f $(TEST_BIN) -s LLVMFuzzerTestOneInput -b 0x4000000000)

ifeq "$(ARCH)" "aarch64"
 AFL_FRIDA_PERSISTENT_ADDR=$(shell $(PWD)../get_symbol_addr.py -f $(TEST_BIN) -s LLVMFuzzerTestOneInput -b 0x0000aaaaaaaaa000)
endif

ifeq "$(ARCH)" "x86_64"
 AFL_FRIDA_PERSISTENT_ADDR=$(shell $(PWD)../get_symbol_addr.py -f $(TEST_BIN) -s LLVMFuzzerTestOneInput -b 0x0000555555554000)
endif

ifeq "$(ARCH)" "x86"
 AFL_FRIDA_PERSISTENT_ADDR=$(shell $(PWD)../get_symbol_addr.py -f $(TEST_BIN) -s LLVMFuzzerTestOneInput -b 0x56555000)
endif

.PHONY: all 32 clean format qemu qemu_entry frida frida_entry debug

all: $(AFLPP_DRIVER_HOOK_OBJ)
	make -C $(ROOT)frida_mode/test/png/persistent/

32:
	CFLAGS="-m32" LDFLAGS="-m32" ARCH="x86" make all

.PHONY: all clean qemu qemu_entry frida frida_entry

all:
	make -C $(ROOT)frida_mode/test/png/persistent/

$(BUILD_DIR):
	mkdir -p $@

$(TEST_DATA_DIR): | $(BUILD_DIR)
	mkdir -p $@

$(AFLPP_DRIVER_DUMMY_INPUT): | $(BUILD_DIR)
	truncate -s 1M $@

$(AFLPP_DRIVER_HOOK_OBJ): $(AFLPP_DRIVER_HOOK_SRC) | $(BUILD_DIR)
	$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@

qemu: $(AFLPP_DRIVER_DUMMY_INPUT) $(AFLPP_DRIVER_HOOK_OBJ) | $(BUILD_DIR)
	AFL_QEMU_PERSISTENT_HOOK=$(AFLPP_DRIVER_HOOK_OBJ) \
	AFL_QEMU_PERSISTENT_ADDR=$(AFL_QEMU_PERSISTENT_ADDR) \
	AFL_QEMU_PERSISTENT_GPR=1 \
	$(ROOT)/afl-fuzz \
		-D \
		-V 30 \
		-Q \
		-i $(TEST_DATA_DIR) \
		-o $(QEMU_OUT) \
		-- \
			$(TEST_BIN) $(AFLPP_DRIVER_DUMMY_INPUT)

qemu_entry: $(AFLPP_DRIVER_DUMMY_INPUT) $(AFLPP_DRIVER_HOOK_OBJ) | $(BUILD_DIR)
	AFL_QEMU_PERSISTENT_HOOK=$(AFLPP_DRIVER_HOOK_OBJ) \
	AFL_QEMU_PERSISTENT_ADDR=$(AFL_QEMU_PERSISTENT_ADDR) \
	AFL_ENTRYPOINT=$(AFL_QEMU_PERSISTENT_ADDR) \
	AFL_QEMU_PERSISTENT_GPR=1 \
	$(ROOT)/afl-fuzz \
		-D \
		-V 30 \
		-Q \
		-i $(TEST_DATA_DIR) \
		-o $(QEMU_OUT) \
		-- \
			$(TEST_BIN) $(AFLPP_DRIVER_DUMMY_INPUT)

frida: $(AFLPP_DRIVER_DUMMY_INPUT) $(AFLPP_DRIVER_HOOK_OBJ) | $(BUILD_DIR)
	AFL_FRIDA_PERSISTENT_HOOK=$(AFLPP_DRIVER_HOOK_OBJ) \
	AFL_FRIDA_PERSISTENT_ADDR=$(AFL_FRIDA_PERSISTENT_ADDR) \
	$(ROOT)afl-fuzz \
		-D \
		-V 30 \
		-O \
		-i $(TEST_DATA_DIR) \
		-o $(FRIDA_OUT) \
		-- \
			$(TEST_BIN) $(AFLPP_DRIVER_DUMMY_INPUT)


frida_entry: $(AFLPP_DRIVER_DUMMY_INPUT) $(AFLPP_DRIVER_HOOK_OBJ) | $(BUILD_DIR)
	AFL_FRIDA_PERSISTENT_HOOK=$(AFLPP_DRIVER_HOOK_OBJ) \
	AFL_FRIDA_PERSISTENT_ADDR=$(AFL_FRIDA_PERSISTENT_ADDR) \
	AFL_ENTRYPOINT=$(AFL_FRIDA_PERSISTENT_ADDR) \
	$(ROOT)afl-fuzz \
		-D \
		-V 30 \
		-O \
		-i $(TEST_DATA_DIR) \
		-o $(FRIDA_OUT) \
		-- \
			$(TEST_BIN) $(AFLPP_DRIVER_DUMMY_INPUT)

debug:
	echo $(AFL_FRIDA_PERSISTENT_ADDR)
	gdb \
		--ex 'set environment LD_PRELOAD=$(ROOT)afl-frida-trace.so' \
		--ex 'set environment AFL_FRIDA_PERSISTENT_HOOK=$(AFLPP_DRIVER_HOOK_OBJ)' \
		--ex 'set environment AFL_FRIDA_PERSISTENT_ADDR=$(AFL_FRIDA_PERSISTENT_ADDR)' \
		--ex 'set disassembly-flavor intel' \
		--args $(TEST_BIN) $(AFLPP_DRIVER_DUMMY_INPUT)

clean:
	rm -rf $(BUILD_DIR)

format:
	cd $(ROOT) && echo $(AFLPP_DRIVER_HOOK_SRC) | xargs -L1 ./.custom-format.py -i