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Makefile
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# Set the location of riscv64-unknown-elf-* and openocd if it is not installed system-wide
BIN_DIR ?= .
SDK_DIR ?= $(abspath freedom-e-sdk)
BSP_DIR := $(SDK_DIR)/bsp/sifive-hifive1
PATH := $(BIN_DIR):$(PATH)
CROSS_COMPILE ?= riscv64-unknown-elf
CC := $(CROSS_COMPILE)-gcc
AR := $(CROSS_COMPILE)-ar
RANLIB := $(CROSS_COMPILE)-ranlib
OBJDUMP := $(CROSS_COMPILE)-objdump
TARGETS := aes128tables aes128ctrbs chacha20 keccakf1600
ELFTARGETS := $(foreach t,$(TARGETS),$(t)/$(t).elf)
.PHONY: all
all: $(ELFTARGETS)
# Required for libmetal.mk
CONFIGURATION := debug
LINK_TARGET := default
METAL_SOURCE_PATH := $(SDK_DIR)/freedom-metal
include $(BSP_DIR)/settings.mk
include $(SDK_DIR)/scripts/libmetal.mk
RISCV_CFLAGS += -march=$(RISCV_ARCH) -mabi=$(RISCV_ABI) -mcmodel=$(RISCV_CMODEL)
RISCV_CFLAGS += -ffunction-sections -fdata-sections
RISCV_CFLAGS += --specs=nano.specs
RISCV_LDFLAGS += -Wl,--gc-sections
RISCV_LDFLAGS += -nostartfiles
RISCV_LDFLAGS += -L$(sort $(dir $(abspath $(filter %.a,$^)))) -T$(abspath $(filter %.lds,$^))
RISCV_LDLIBS += -Wl,--start-group -lc -lgcc -lmetal -lmetal-gloss -Wl,--end-group
CFLAGS += $(RISCV_CFLAGS)
CFLAGS += -O3 -fno-builtin-printf -std=gnu17 -Wall -Wextra -Wpedantic -Wvla -Wmissing-prototypes
CFLAGS += -Iutil
LDFLAGS += $(RISCV_LDFLAGS)
LDLIBS += $(RISCV_LDLIBS)
METAL_DEPS := $(BSP_DIR)/install/lib/$(CONFIGURATION)/libmetal.a \
$(BSP_DIR)/install/lib/$(CONFIGURATION)/libmetal-gloss.a \
$(BSP_DIR)/metal.$(LINK_TARGET).lds
#TODO Do this in a static pattern rule for $(ELFTARGETS)
aes128tables/aes128tables.elf: $(METAL_DEPS) $(wildcard aes128tables/*.c) $(wildcard aes128tables/*.h) $(wildcard aes128tables/*.S) $(wildcard util/*.S)
$(CC) -o $@ $(CFLAGS) $(LDFLAGS) $(LDLIBS) $(filter %.c,$^) $(filter %.S,$^)
aes128ctrbs/aes128ctrbs.elf: $(METAL_DEPS) $(wildcard aes128ctrbs/*.c) $(wildcard aes128ctrbs/*.h) $(wildcard aes128ctrbs/*.S) $(wildcard util/*.S)
$(CC) -o $@ $(CFLAGS) $(LDFLAGS) $(LDLIBS) $(filter %.c,$^) $(filter %.S,$^)
chacha20/chacha20.elf: $(METAL_DEPS) $(wildcard chacha20/*.c) $(wildcard chacha20/*.h) $(wildcard chacha20/*.S) $(wildcard util/*.S)
$(CC) -o $@ $(CFLAGS) $(LDFLAGS) $(LDLIBS) $(filter %.c,$^) $(filter %.S,$^)
keccakf1600/keccakf1600.elf: $(METAL_DEPS) $(wildcard keccakf1600/*.c) $(wildcard keccakf1600/*.h) $(wildcard keccakf1600/*.S) $(wildcard util/*.S)
$(CC) -o $@ $(CFLAGS) $(LDFLAGS) $(LDLIBS) $(filter %.c,$^) $(filter %.S,$^)
.PHONY: clean
clean:
-rm -f $(ELFTARGETS)
.PHONY: upload
upload: $(PROGRAM_ELF)
scripts/upload --elf $(PROGRAM_ELF) --openocd $(RISCV_OPENOCD) --gdb $(RISCV_GDB) --openocd-config bsp/$(TARGET)/openocd.cfg