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https://github.com/taigrr/gopher-os
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6820ffef2b
The Makefile contains rules for invoking the offsets tool to generate the offset definitions for members of the g, m and stack structs. The definitions are stored in BUILD_DIR and BUILD_DIR is passed as an include target to nasm.
178 lines
6.1 KiB
Makefile
178 lines
6.1 KiB
Makefile
OS = $(shell uname -s)
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ARCH := x86_64
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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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# If your go is called something else set it on the commandline, like
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# this: make run GO=go1.8
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GO ?= go
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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 := amd64
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GOROOT := $(shell $(GO) env GOROOT)
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GC_FLAGS ?=
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LD_FLAGS := -n -T $(BUILD_DIR)/linker.ld -static --no-ld-generated-unwind-info
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AS_FLAGS := -g -f elf64 -F dwarf -I $(BUILD_DIR)/ -I arch/$(ARCH)/asm/ -dNUM_REDIRECTS=$(shell $(GO) run tools/redirects/redirects.go count)
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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_image
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kernel_image: $(kernel_target)
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@echo "[tools:redirects] populating kernel image redirect table"
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@$(GO) run tools/redirects/redirects.go populate-table $(kernel_target)
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$(kernel_target): asm_files linker_script 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=$(GOARCH) GOOS=$(GOOS) $(GO) build -gcflags '$(GC_FLAGS)' -n 2>&1 | sed \
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-e "1s|^|set -e\n|" \
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-e "1s|^|export GOOS=$(GOOS)\n|" \
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-e "1s|^|export GOARCH=$(GOARCH)\n|" \
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-e "1s|^|export GOROOT=$(GOROOT)\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='-nostartfiles -nodefaultlibs -nostdlib -r' -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 "kmain.Kmain$$" | cut -d' ' -f1` \
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--globalize-symbol _rt0_interrupt_handlers \
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--globalize-symbol runtime.g0 \
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--globalize-symbol runtime.m0 \
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--globalize-symbol runtime.physPageSize \
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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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iso_prereq: xorriso_check grub-pc-bin_check
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xorriso_check:
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@if xorriso --version >/dev/null 2>&1; then exit 0; else echo "Install xorriso via 'sudo apt install xorriso'." ; exit 1 ; fi
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grub-pc-bin_check:
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@ if dpkg -l grub-pc-bin > /dev/null; then exit 0; else echo "Install package grub-pc-bin via 'sudo apt install grub-pc-bin'."; exit 1; fi
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linker_script:
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@echo "[sed] extracting LMA and VMA from constants.inc"
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@echo "[gcc] pre-processing arch/$(ARCH)/script/linker.ld.in"
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@gcc `cat arch/$(ARCH)/asm/constants.inc | sed -e "/^$$/d; /^;/d; s/^/-D/g; s/\s*equ\s*/=/g;" | tr '\n' ' '` \
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-E -x \
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c arch/$(ARCH)/script/linker.ld.in | grep -v "^#" > $(BUILD_DIR)/linker.ld
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$(BUILD_DIR)/go_asm_offsets.inc:
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@mkdir -p $(BUILD_DIR)
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@echo "[tools:offsets] calculating OS/arch-specific offsets for g, m and stack structs"
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@$(GO) run tools/offsets/offsets.go -target-os $(GOOS) -target-arch $(GOARCH) -go-binary $(GO) -out $@
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$(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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asm_files: $(BUILD_DIR)/go_asm_offsets.inc $(asm_obj_files)
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iso: $(iso_target)
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$(iso_target): iso_prereq kernel_image
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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 $(VAGRANT_SRC_FOLDER); make GC_FLAGS="$(GC_FLAGS)" kernel'
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iso:
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vagrant ssh -c 'cd $(VAGRANT_SRC_FOLDER); make GC_FLAGS="$(GC_FLAGS)" iso'
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endif
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run: iso
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qemu-system-$(ARCH) -cdrom $(iso_target) -d int,cpu_reset -no-reboot
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# When building gdb target disable optimizations (-N) and inlining (l) of Go code
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gdb: GC_FLAGS += -N -l
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gdb: iso
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qemu-system-$(ARCH) -M accel=tcg -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 'set disassembly-flavor intel' \
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-ex 'layout split' \
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-ex 'set arch i386:intel' \
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-ex 'file $(kernel_target)' \
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-ex 'target remote localhost:1234' \
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-ex 'set arch i386:x86-64:intel' \
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-ex 'source $(GOROOT)/src/runtime/runtime-gdb.py' \
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-ex 'set substitute-path $(VAGRANT_SRC_FOLDER) $(shell pwd)'
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@killall qemu-system-$(ARCH) || true
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clean:
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@test -d $(BUILD_DIR) && rm -rf $(BUILD_DIR) || true
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lint: lint-check-deps
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@echo "[gometalinter] linting sources"
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@gometalinter.v1 \
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--disable-all \
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--enable=deadcode \
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--enable=errcheck \
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--enable=gosimple \
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--enable=ineffassign \
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--enable=misspell \
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--enable=staticcheck \
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--enable=vet \
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--enable=vetshadow \
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--enable=unconvert \
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--enable=varcheck \
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--enable=golint \
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--deadline 300s \
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--exclude 'return value not checked' \
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--exclude 'possible misuse of unsafe.Pointer' \
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./...
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lint-check-deps:
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@$(GO) get -u gopkg.in/alecthomas/gometalinter.v1
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@gometalinter.v1 --install >/dev/null
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test:
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$(GO) test -cover ./...
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