initial commit

Makefile

@@ -0,0 +1,46 @@
+RISCV_CC ?= riscv64-unknown-elf-gcc
+RISCV_ARCH_FLAGS ?= -march=rv32im -mabi=ilp32
+HOST_CC ?= gcc
+HOST_CFLAGS ?= -Wall -Wextra -O3 -g
+HOST_LDFLAGS ?= -Wl,-s
+
+EMU_SRC_FILES := $(wildcard src/emulated/*.c)
+EMU_OBJ_FILES := $(EMU_SRC_FILES:src/emulated/%.c=build/%.riscv.o)
+EMU_OBJ := build/emulated.riscv.elf
+
+HOST_SRC := src/main.c src/elf.c
+HOST_EXE := build/main.exe
+
+# Disassembly
+RISCV_OBJDUMP ?= $(patsubst %-gcc,%-objdump,$(RISCV_CC))
+_DISAS_TARGETS := $(filter disas-%,$(MAKECMDGOALS))
+_DISAS_FILES   := $(if $(_DISAS_TARGETS),$(filter %.elf %.o,$(MAKECMDGOALS)))
+
+
+
+.PHONY: all emulated-riscv host clean disas-risc
+
+all: $(HOST_EXE) $(EMU_OBJ)
+
+emulated-riscv: $(EMU_OBJ)
+
+host: $(HOST_EXE)
+
+$(HOST_EXE): $(HOST_SRC) tinyriscv/src/tinyriscv.h src/config.h src/elf.h | build
+	$(HOST_CC) $(HOST_CFLAGS) $(HOST_LDFLAGS) -I src -I tinyriscv/src $(HOST_SRC) -o $@
+
+build/%.riscv.o: src/emulated/%.c | build
+	$(RISCV_CC) $(RISCV_ARCH_FLAGS) -c $< -o $@
+
+$(EMU_OBJ): $(EMU_OBJ_FILES) | build
+	$(RISCV_CC) $(RISCV_ARCH_FLAGS) -nostdlib -Wl,-e,entry -Wl,-Ttext=0 $(EMU_OBJ_FILES) -o $@
+
+build:
+	mkdir -p $@
+
+clean:
+	rm -rf build
+
+disas-risc: $(_DISAS_FILES)
+	$(RISCV_OBJDUMP) -d $^
+