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Makefile
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# "RiOS" -- a Naive kernel
#
# RiOS/makefile
# Copyright (C) 2018 qiuri
# Compiler settings and options
CC = gcc
LD = ld
CFLAGS = -fno-stack-protector -m32 \
-c \
-fno-builtin -fno-omit-frame-pointer \
-fno-pic -fno-exceptions \
-ffreestanding \
-I./src/include \
-Wall
# -fno-rtti
#-nostdinc
# Platform i386
arch ?= i386
# Files
iso := build/RiOS-$(arch).iso
kernel :=build/kernel-$(arch).bin
linker_script := src/linker.ld
grub_cfg :=src/grub.cfg
report :=doc/report.md
# c_source :=$(wildcard src/*.c)
# Alternatively, c_source =$(shell find src/ -name "*.c")
# asm_source := $(wildcard src/*.asm)
include GNUMakefile
# add another file here
asm_obj := $(patsubst src/%.asm,\
build/arch/$(arch)/%.o, $(wildcard src/*.asm))
cc_obj := $(patsubst src/%.cc,\
build/arch/$(arch)/%.o, $(wildcard src/*.cc)) $(console_objs) \
$(mm_objs) \
$(kernel_objs) \
$(blk_dev_objs) \
$(fs_objs) \
$(task_objs) \
$(app_objs)
gas_obj := $(patsubst src/kernel/gas/%.S,\
build/arch/$(arch)/kernel/gas/%.o, $(wildcard src/kernel/gas/*.S))
objs := asm_obj cc_obj gas_obj
Harddisk := build/hd.img
.PHONY: clean run iso help virtualbox qemu docx
run : $(iso) $(Harddisk)
qemu-system-x86_64 -m 666 $(iso) -hdb $(Harddisk) -monitor stdio
qemu: $(iso) $(Harddisk)
qemu-system-x86_64 -m 666 -hdb $(Harddisk) $(iso) -monitor stdio
iso : $(iso)
$(iso): $(kernel) $(grub_cfg)
mkdir -p build/iso/boot/grub
cp $(kernel) build/iso/boot/kernel.bin
cp $(grub_cfg) build/iso/boot/grub
grub-mkrescue -o $(iso) build/iso/
$(kernel): $(asm_obj) $(gas_obj) $(cc_obj) $(linker_script)
$(LD) -n -m elf_i386 -T $(linker_script) -o $(kernel) $(asm_obj) $(gas_obj) $(cc_obj)
$(Harddisk):
cp hd/rios_hd.img build/hd.img
# Compile .asm files with nasm
build/arch/$(arch)/%.o : src/%.asm
mkdir -p $(shell dirname $@)
nasm -f elf32 $< -o $@
# Compile .cc files (cplusplus)
build/arch/$(arch)/%.o: src/%.cc
mkdir -p $(shell dirname $@)
$(CC) $(CFLAGS) $< -o $@
# Compile .S files with gcc
build/arch/$(arch)/kernel/gas/%.o :src/kernel/gas/%.S
mkdir -p $(shell dirname $@)
$(CC) -c -m32 $< -o $@
clean :
@# rm -r build
@if [ ! -d "build" ];then \
echo "directory 'build' currently does NOT exist."; \
else \
rm -r build; \
fi
help :
@echo "Usage: make [OPTION...]"
@echo "$ make run"
@echo "$ make clean"
@echo "Please make sure that xorriso,qemu have be correctly installed."
@echo "Report bugs to 3103204417@qq.com"
virtualbox: $(iso)
@echo " First, you should comfirm that you have created a \
virtual machine named 'RiOS' with Virtualbox."
@echo " THEN set CDROM with build/RiOS-i386.iso."
@echo " DONNOT forget to allocate enough HD space in your VM!"
virtualbox --startvm 'RiOS'
docx: $(report)
@cd doc ; pandoc -f markdown -t html report.md | pandoc -f html -t docx -o report.docx ; cd -
@echo "generating doc/report.docx from doc/report.md."
# 'make doc': confirm that you have correctly installed pandoc,if not
# please '$ sudo apt-get install pandoc ' first.
# 1.wildcard :扩展通配符
# 2.patsubst :替换通配符
# eg. wildcard *.c => get all c files
# patsubst %c,%o,$(wildcard *.c) =>.c to .o,get all obj files
# ?= if not set,set it
# .PHONY 定义一些伪目标
# grub-mkrescue相当于把那个文件夹打包成iso
# GNU make手册：http://www.gnu.org/software/make/manual/make.html
# Compile with "-fno-stack-protector" ，otherwise :(
# "undefined reference to `__stack_chk_fail'"
# ld -n ... "-n" Option:pass "-nmagic" flag to the linker,
# -n disables the automatic section alignment in the executebale
# ,otherwise GRUB2 may fail to find Multiboot
# Our kernel is for i386,which is x86-32. However,thanks to x86's backward
# compatibility , RiOS will be OK with x86-64 architecture.
# for more about $<,$@ ,please refer to
# https://www.gnu.org/software/make/manual/html_node/Pattern-Rules.html#Pattern-Rules
# gcc with -c OPTION,otherwise "undefined reference to 'main' " :(
#
# -I./src/include \ :add search PATH,this depends on the location of Makefile
# #include <blabla.h>
# The option -ffreestanding directs the compiler to not assume that standard
# functions have their usual definition.
# target: ***build/RiOS-i386.iso*** => write to U disk
# qemu-system-x86_64 -kernel kernel-i386.bin
# qemu-system-x86_64 RiOS-i386.iso
#-hdb 第二块硬盘 iso镜像为第一块
#-nostdinc -Iinclude 不从系统中的库去找，而从自己的地方去找
# -hda means IDE disk0, and -hdb means IDE disk1.
# bug解决：删去-cdrom!从硬盘启动