86742879f3
Debian-9.5/amd64. But building hello.mo with i386-elf-gcc (5.5.0) cross compiler on OpenBSD-6.3/amd64, undefined reference to 'rt_kprintf' error occurs. To avoid this error, "compile and link" process needs to be divided to simply "compile" and "link". On Debian-9.5, both previous and current method produces same hello.mo. We have to improve disk image creation (Linux dependent), this is a future homework.
47 lines
1002 B
Makefile
47 lines
1002 B
Makefile
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CC = gcc -O0 -m32 -fno-builtin -fno-stack-protector -nostdinc -nostdlib
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LD = ld -melf_i386 -nostdlib
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all: rtthread rtsym exe dll floppy.img
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@mkdir -p tmp
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@sudo mount -t vfat floppy.img tmp -o loop
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@sudo cp -fv rtthread.elf tmp/boot/oskernel
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@sudo rm tmp/bin/* -fr
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@sudo cp out/*.mo tmp/bin/ -fv
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@sudo umount tmp
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rtthread:
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@scons
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rtsym:
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@./src/extract.sh ./rtthread-ia32.map ./src/rt_thread_sym.h
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obj:
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mkdir -p obj
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out:
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mkdir -p out
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dll: obj out
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$(CC) -c -fPIC -Isrc src/hello.c -o out/hello.o
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$(CC) -s -Wl,-shared,-melf_i386,--entry=main -o out/hello.mo out/hello.o
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disasm: obj out
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$(CC) -shared -S -fPIC -Isrc src/hello.c -o obj/hello.s
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cat obj/hello.s
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objdump --disassemble out/hello.mo
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exe: obj out
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clean:
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scons -c clean
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rm -fr build rtthread* out obj
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floppy.img:
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wget https://github.com/bajdcc/tinix/raw/master/floppy.img
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# https://en.wikibooks.org/wiki/QEMU/Devices/Network
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run:
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qemu-system-i386 -fda floppy.img -boot a -m 64M -serial stdio -net nic,model=ne2k_pci
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