Mathieu Maret
6854ad489f
Trick was to use the stack-protector-guard option otherwise gcc expect the canary value to be stored on the Thread Local Storage of the current thread. That does not work the same way for us, so trying to access TLS at %gs (the canonical place for the TLS), where gcc expect the canary to be storeg, lead to system reboot as it is not setup.
118 lines
4.3 KiB
Makefile
118 lines
4.3 KiB
Makefile
# Used to generated .d file that deal with header dependencies
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CPPFLAGS = -MMD
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AS=nasm
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ASFLAGS += -f elf32
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LDFLAGS += -m elf_i386
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CFLAGS += -m32 -pipe -Wall -Wextra -Werror -ffreestanding -fno-exceptions -fno-pie -fno-tree-vectorize -D__KERNEL__ -fstack-protector-all -mstack-protector-guard=global
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#keep .i and .s
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#CFLAGS += -save-temps -fverbose-asm
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#CFLAGS += -fanalyzer -Wno-analyzer-malloc-leak -Wno-analyzer-out-of-bounds
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CXXFLAGS += -m32 -Wall -Wextra -Werror -ffreestanding -fno-exceptions -fno-rtti -fno-pie
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DEBUG_FLAGS += -g -Og -DDEBUG -fno-omit-frame-pointer -fno-inline
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LIBGCC = $(shell $(CC) -print-libgcc-file-name $(CFLAGS))
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QEMU_OPT += -hda disk.img
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ARCH?=x86
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SUBDIRS := core drivers tests arch/$(ARCH)
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INCDIRS += $(foreach dir, $(SUBDIRS), -I$(dir))
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CPPFLAGS += $(INCDIRS)
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asmsrc=
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asmobj=$(asmsrc:%.asm=%.o)
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gasmsrc=$(wildcard arch/$(ARCH)/*.S arch/$(ARCH)/boot/*.S)
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gasmobj=$(gasmsrc:%.S=%.o)
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csrc=$(shell find $(SUBDIRS) -type f -name "*.c")# $(wildcard *.c)
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cobj=$(csrc:%.c=%.o)
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cinc=$(csrc:%.c=%.i)
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deps=$(csrc:%.c=%.d) $(gasmsrc:%.S=%.d)
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docsrc=$(wildcard docs/*.md)
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docobj=$(docsrc:%.md=%.html)
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kernel kernel.debug &: $(asmobj) $(gasmobj) $(cobj) linker.ld
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$(LD) $(LDFLAGS) $(asmobj) $(gasmobj) $(cobj) -o kernel -T linker.ld $(LIBGCC) -Map kernel.map
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objcopy --only-keep-debug kernel kernel.debug
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objcopy --strip-debug kernel
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objcopy --add-gnu-debuglink=kernel.debug kernel
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fd.iso: kernel
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mkdir -p isodir/boot/grub
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cp $< isodir/boot/
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@printf "set timeout=0\nset default=0\nmenuentry \"matos\" {\n\tmultiboot /boot/kernel\n}" > isodir/boot/grub/grub.cfg
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grub-mkrescue -o $@ isodir
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userspace: FORCE
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$(MAKE) -C userspace
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FORCE:
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@
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doc: $(docobj) ## generate documentation
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help: ## show this help
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# regex for general help
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@sed -ne "s/^##\(.*\)/\1/p" $(MAKEFILE_LIST)
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# regex for makefile commands (targets)
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@printf "────────────────────────`tput bold``tput setaf 2` Make Commands `tput sgr0`────────────────────────────────\n"
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@sed -ne "/@sed/!s/\(^[^#?=]*:\).*##\(.*\)/`tput setaf 2``tput bold`\1`tput sgr0`\2/p" $(MAKEFILE_LIST)
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# regex for makefile variables
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@printf "────────────────────────`tput bold``tput setaf 4` Make Variables `tput sgr0`───────────────────────────────\n"
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@sed -ne "/@sed/!s/\(.*\)?=\(.*\)##\(.*\)/`tput setaf 4``tput bold`\1:`tput setaf 5`\2`tput sgr0`\3/p" $(MAKEFILE_LIST)
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disk.img: disk.sfdisk userspace
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qemu-img create -f raw $@ 32M
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sfdisk $@ < $<
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# Before having filesystem support, just dump the user prog into the first partition
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strip userspace/user -o userspace/user.strip
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$(eval file_size:=$(shell du -b userspace/user.strip|awk '{print $$1}' | xargs printf "%016d" )) \
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sed '1s/^/$(file_size)/' userspace/user.strip | dd of=disk.img seek=34816 bs=512
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# NASM without preprocessing
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%.o:%.asm
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$(AS) $(ASFLAGS) -o $@ $<
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#GNU GAS ASM with C Preprocessing
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%.o: %.S
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$(CC) $(CFLAGS) $(CPPFLAGS) -c "$<" -o "$@"
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%.html: %.md
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markdown -o $@ $<
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%.i: %.c
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$(CC) $(CFLAGS) $(CPPFLAGS) -E -c "$<" -o "$@"
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test: CFLAGS += -DRUN_TEST ## Run the OS on qemu with the inner test activated
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test: clean kernel disk.img
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qemu-system-x86_64 -kernel kernel -serial stdio -m 32M $(QEMU_OPT)
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run:kernel disk.img ## Run the OS on qemu
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qemu-system-x86_64 -kernel $< -serial stdio $(QEMU_OPT)
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debug: CFLAGS += $(DEBUG_FLAGS) ## Run the OS on qemu and attach a debugger to it (may need a clean before to have the debug symbols)
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debug: CXXFLAGS += $(DEBUG_FLAGS)
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debug:kernel kernel.debug disk.img
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gdb -q -x debug.gdb
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isodebug: CFLAGS += $(DEBUG_FLAGS) ## Same than previous but kernel is loaded by grub. So, for example, we can access the elf debug info
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isodebug: CXXFLAGS += $(DEBUG_FLAGS)
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isodebug:fd.iso disk.img
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gdb -q -x debug.iso.gdb
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debug_test: CFLAGS += $(DEBUG_FLAGS) -DRUN_TEST
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debug_test: debug
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screenshot: ## Take a screenshot of the qemu window
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shutter --window=qemu -o screenshot_1.png -e && zopflipng screenshot_1.png screenshot_1.png
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clean:
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$(RM) kernel $(asmobj) $(gasmobj) $(cobj) $(deps) $(cinc) fd.iso kernel.debug kernel.map $(docobj)
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$(RM) -r isodir
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$(MAKE) -C userspace clean
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.PHONY:
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userspace screenshot
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ifneq ($(MAKECMDGOALS),clean)
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-include $(deps)
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endif
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