mirror of
https://github.com/taigrr/gopher-os
synced 2025-01-18 04:43:13 -08:00
d69c945019
If kernel.Kmain defines a nested function then a symbol like `github.com/achilleasa/gopher-os/kernel.Kmain.func1` will be generated. To make sure we always pick the `github.com/achilleasa/gopher-os/kernel.Kmain` symbol address we just need to add a `$` to the grep argument.
110 lines
3.6 KiB
Makefile
110 lines
3.6 KiB
Makefile
OS = $(shell uname -s)
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ARCH := x86
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BUILD_DIR := build
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BUILD_ABS_DIR := $(CURDIR)/$(BUILD_DIR)
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kernel_target :=$(BUILD_DIR)/kernel-$(ARCH).bin
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iso_target := $(BUILD_DIR)/kernel-$(ARCH).iso
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ifeq ($(OS), Linux)
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export SHELL := /bin/bash -o pipefail
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LD := ld
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AS := nasm
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GOOS := linux
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GOARCH := 386
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LD_FLAGS := -n -melf_i386 -T arch/$(ARCH)/script/linker.ld -static --no-ld-generated-unwind-info
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AS_FLAGS := -g -f elf32 -F dwarf -I arch/$(ARCH)/asm/
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MIN_OBJCOPY_VERSION := 2.26.0
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HAVE_VALID_OBJCOPY := $(shell objcopy -V | head -1 | awk -F ' ' '{print "$(MIN_OBJCOPY_VERSION)\n" $$NF}' | sort -ct. -k1,1n -k2,2n && echo "y")
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asm_src_files := $(wildcard arch/$(ARCH)/asm/*.s)
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asm_obj_files := $(patsubst arch/$(ARCH)/asm/%.s, $(BUILD_DIR)/arch/$(ARCH)/asm/%.o, $(asm_src_files))
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.PHONY: kernel iso clean binutils_version_check
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kernel: binutils_version_check $(kernel_target)
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$(kernel_target): $(asm_obj_files) go.o
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@echo "[$(LD)] linking kernel-$(ARCH).bin"
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@$(LD) $(LD_FLAGS) -o $(kernel_target) $(asm_obj_files) $(BUILD_DIR)/go.o
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go.o:
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@mkdir -p $(BUILD_DIR)
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@echo "[go] compiling go sources into a standalone .o file"
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@GOARCH=386 GOOS=linux go build -n 2>&1 | sed \
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-e "1s|^|set -e\n|" \
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-e "1s|^|export GOOS=linux\n|" \
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-e "1s|^|export GOARCH=386\n|" \
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-e "1s|^|WORK='$(BUILD_ABS_DIR)'\n|" \
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-e "1s|^|alias pack='go tool pack'\n|" \
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-e "/^mv/d" \
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-e "s|-extld|-tmpdir='$(BUILD_ABS_DIR)' -linkmode=external -extldflags='-nostdlib' -extld|g" \
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| sh 2>&1 | sed -e "s/^/ | /g"
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@# build/go.o is a elf32 object file but all go symbols are unexported. Our
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@# asm entrypoint code needs to know the address to 'main.main' so we use
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@# objcopy to make that symbol exportable. Since nasm does not support externs
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@# with slashes we create a global symbol alias for kernel.Kmain
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@echo "[objcopy] creating global symbol alias 'kernel.Kmain' for 'github.com/achilleasa/gopher-os/kernel.Kmain' in go.o"
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@objcopy \
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--add-symbol kernel.Kmain=.text:0x`nm $(BUILD_DIR)/go.o | grep "kernel.Kmain$$" | cut -d' ' -f1` \
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$(BUILD_DIR)/go.o $(BUILD_DIR)/go.o
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binutils_version_check:
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@echo "[binutils] checking that installed objcopy version is >= $(MIN_OBJCOPY_VERSION)"
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@if [ "$(HAVE_VALID_OBJCOPY)" != "y" ]; then echo "[binutils] error: a more up to date binutils installation is required" ; exit 1 ; fi
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$(BUILD_DIR)/arch/$(ARCH)/asm/%.o: arch/$(ARCH)/asm/%.s
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@mkdir -p $(shell dirname $@)
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@echo "[$(AS)] $<"
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@$(AS) $(AS_FLAGS) $< -o $@
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iso: $(iso_target)
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$(iso_target): $(kernel_target)
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@echo "[grub] building ISO kernel-$(ARCH).iso"
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@mkdir -p $(BUILD_DIR)/isofiles/boot/grub
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@cp $(kernel_target) $(BUILD_DIR)/isofiles/boot/kernel.bin
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@cp arch/$(ARCH)/script/grub.cfg $(BUILD_DIR)/isofiles/boot/grub
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@grub-mkrescue -o $(iso_target) $(BUILD_DIR)/isofiles 2>&1 | sed -e "s/^/ | /g"
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@rm -r $(BUILD_DIR)/isofiles
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else
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VAGRANT_SRC_FOLDER = /home/vagrant/workspace/src/github.com/achilleasa/gopher-os
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.PHONY: kernel iso vagrant-up vagrant-down vagrant-ssh run gdb clean
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kernel:
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vagrant ssh -c 'cd $(VAGRANT_SRC_FOLDER); make kernel'
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iso:
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vagrant ssh -c 'cd $(VAGRANT_SRC_FOLDER); make iso'
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run: iso
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qemu-system-i386 -cdrom $(iso_target)
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gdb: iso
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qemu-system-i386 -s -S -cdrom $(iso_target) &
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sleep 1
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gdb \
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-ex "add-auto-load-safe-path $(pwd)" \
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-ex "file $(kernel_target)" \
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-ex "set disassembly-flavor intel" \
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-ex 'set arch i386:intel' \
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-ex 'target remote localhost:1234' \
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-ex 'layout asm' \
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-ex 'b _rt0_entry' \
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-ex 'continue' \
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-ex 'disass'
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@killall qemu-system-i386 || true
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endif
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clean:
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@test -d $(BUILD_DIR) && rm -rf $(BUILD_DIR) || true
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