mirror of
https://github.com/plctlab/riscv-operating-system-mooc.git
synced 2025-12-05 15:15:49 +00:00
eb61470e22
Align heap start and caculate number of reserved pages according to the length of ram available. See https://gitee.com/unicornx/riscv-operating-system-mooc/issues/I9LNCF. Signed-off-by: Chen Wang <unicorn_wang@outlook.com>
86 lines
2.2 KiB
Makefile
86 lines
2.2 KiB
Makefile
# Common part for the Makefile.
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# This file will be included by the Makefile of each project.
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# Custom Macro Definition (Common part)
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include ../defines.mk
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DEFS +=
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CROSS_COMPILE = riscv64-unknown-elf-
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CFLAGS += -nostdlib -fno-builtin -g -Wall
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CFLAGS += -march=rv32g -mabi=ilp32
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QEMU = qemu-system-riscv32
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QFLAGS = -nographic -smp 1 -machine virt -bios none
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GDB = gdb-multiarch
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CC = ${CROSS_COMPILE}gcc
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OBJCOPY = ${CROSS_COMPILE}objcopy
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OBJDUMP = ${CROSS_COMPILE}objdump
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MKDIR = mkdir -p
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RM = rm -rf
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OUTPUT_PATH = out
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# SRCS_ASM & SRCS_C are defined in the Makefile of each project.
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OBJS_ASM := $(addprefix ${OUTPUT_PATH}/, $(patsubst %.S, %.o, ${SRCS_ASM}))
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OBJS_C := $(addprefix $(OUTPUT_PATH)/, $(patsubst %.c, %.o, ${SRCS_C}))
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OBJS = ${OBJS_ASM} ${OBJS_C}
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ELF = ${OUTPUT_PATH}/os.elf
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BIN = ${OUTPUT_PATH}/os.bin
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USE_LINKER_SCRIPT ?= true
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ifeq (${USE_LINKER_SCRIPT}, true)
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LDFLAGS = -T ${OUTPUT_PATH}/os.ld.generated
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else
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LDFLAGS = -Ttext=0x80000000
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endif
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.DEFAULT_GOAL := all
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all: ${OUTPUT_PATH} ${ELF}
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${OUTPUT_PATH}:
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@${MKDIR} $@
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# start.o must be the first in dependency!
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#
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# For USE_LINKER_SCRIPT == true, before do link, run preprocessor manually for
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# linker script.
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# -E specifies GCC to only run preprocessor
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# -P prevents preprocessor from generating linemarkers (#line directives)
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# -x c tells GCC to treat your linker script as C source file
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${ELF}: ${OBJS}
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ifeq (${USE_LINKER_SCRIPT}, true)
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${CC} -E -P -x c ${DEFS} ${CFLAGS} os.ld > ${OUTPUT_PATH}/os.ld.generated
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endif
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${CC} ${CFLAGS} ${LDFLAGS} -o ${ELF} $^
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${OBJCOPY} -O binary ${ELF} ${BIN}
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${OUTPUT_PATH}/%.o : %.c
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${CC} ${DEFS} ${CFLAGS} -c -o $@ $<
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${OUTPUT_PATH}/%.o : %.S
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${CC} ${DEFS} ${CFLAGS} -c -o $@ $<
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run: all
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@${QEMU} -M ? | grep virt >/dev/null || exit
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@echo "Press Ctrl-A and then X to exit QEMU"
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@echo "------------------------------------"
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@${QEMU} ${QFLAGS} -kernel ${ELF}
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.PHONY : debug
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debug: all
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@echo "Press Ctrl-C and then input 'quit' to exit GDB and QEMU"
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@echo "-------------------------------------------------------"
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@${QEMU} ${QFLAGS} -kernel ${ELF} -s -S &
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@${GDB} ${ELF} -q -x ../gdbinit
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.PHONY : code
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code: all
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@${OBJDUMP} -S ${ELF} | less
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.PHONY : clean
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clean:
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@${RM} ${OUTPUT_PATH}
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