Imbus/Risc-V-Asm
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Gitignore and better makefile

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Imbus 2024-04-05 16:02:24 +02:00
parent bd1fe4b2a8
commit 9ff42d8fbc
2 changed files with 55 additions and 12 deletions
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.gitignore vendored Normal file
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@ -0,0 +1,2 @@
*.o
*.elf

65
makefile
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@ -1,16 +1,40 @@
# Compiler and assembler # Compiler and assembler
CC = riscv64-linux-gnu-gcc CROSS=riscv64-linux-gnu
AS = riscv64-linux-gnu-as CC = ${CROSS}-gcc
LD = riscv64-linux-gnu-ld AS = ${CROSS}-as
LD = ${CROSS}-ld
OBJDUMP = ${CROSS}-objdump
SIZE = ${CROSS}-size
# Flags for compiler and assembler # Specify the target binary (call it whatever)
CFLAGS = -static -nostartfiles -nostdlib TARGET = bin.elf
ASFLAGS =
# QEMU command and flags # QEMU command and flags
QEMU = qemu-riscv64-static QEMU = qemu-riscv64-static
QEMU_FLAGS = QEMU_FLAGS =
# Flags for compiler and assembler
CFLAGS += -static# # Use static linking
CFLAGS += -nostartfiles# # Do not use standard startup files
CFLAGS += -nostdlib# # Do not use standard libraries
CFLAGS += -fno-builtin# # Do not use built-in functions
CFLAGS += -fno-common# # Do not use common sections
CFLAGS += -march=rv64i # Use RV64I ISA, i.e., integer only
CFLAGS += -mabi=lp64 # Use LP64 ABI, i.e., 64-bit longs and pointers, 32-bit ints
CFLAGS += -Os# # Optimize for size
# Use GC=0 to disable garbage collection
ifneq ($(GC), 0)
CFLAGS += -ffreestanding
CFLAGS += -ffunction-sections -fdata-sections
CFLAGS += -Wl,--gc-sections
endif
# Debugging flags, passed as 'make DEBUG=1 <target>'
ifeq ($(DEBUG), 1)
CFLAGS += -g -O0
endif
# Assembly source files # Assembly source files
AS_SRCS := $(wildcard *.s) AS_SRCS := $(wildcard *.s)
@ -19,17 +43,34 @@ OBJS := $(AS_SRCS:.s=.o)
# Default target # Default target
all: $(OBJS) all: $(OBJS)
$(LD) -o program $(OBJS) @$(CC) $(CFLAGS) -o $(TARGET) $(OBJS)
# $(CC) $(CFLAGS) -o program $(OBJS) @echo "LD $(OBJS)"
# Compile assembly sources # Compile assembly sources
%.o: %.s %.o: %.s
$(AS) $(ASFLAGS) -o $@ $< @$(CC) $(CFLAGS) -c -o $@ $<
@echo "CC $<"
# Run the program in QEMU # Run the binary in QEMU
run: all run: all
$(QEMU) $(QEMU_FLAGS) ./program $(QEMU) $(QEMU_FLAGS) ./$(TARGET)
# View the text section of the binary
inspect: all
$(OBJDUMP) -d $(TARGET)
# View the disassembly
raw: all
$(OBJDUMP) -D $(TARGET)
# View the data section
data: all
$(OBJDUMP) -s $(TARGET) --section=.data
# Check the size of the compiled binary
size: all
$(SIZE) $(TARGET)
# Clean up # Clean up
clean: clean:
rm -f program $(OBJS) rm -f $(TARGET) $(OBJS)