mirror of
https://github.com/taigrr/gopher-os
synced 2025-01-18 04:43:13 -08:00
545a18fccc
The implementation of Printf has been moved from the early package to the kfmt package. The dependency to ActiveTerminal has been removed and the code now uses an io.Writer for its output. As Go interfaces cannot be used before bootstrapping the Go runtime, the code uses a ring-buffer fallback for storing any kernel output emitted before that point.
186 lines
6.4 KiB
Makefile
186 lines
6.4 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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GOPATH := $(GOPATH):$(shell pwd)
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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 $(BUILD_DIR)/ -I src/arch/$(ARCH)/asm/ \
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-dNUM_REDIRECTS=$(shell GOPATH=$(GOPATH) $(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 src/arch/$(ARCH)/asm/*.s)
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asm_obj_files := $(patsubst src/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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@GOPATH=$(GOPATH) $(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) GOPATH=$(GOPATH) $(GO) build -gcflags '$(GC_FLAGS)' -n gopheros 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] create kernel.Kmain alias to gopheros/kernel/kmain.Kmain"
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@echo "[objcopy] globalizing symbols {_rt0_interrupt_handlers, runtime.g0/m0/physPageSize}"
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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/$(ARCH)/script/linker.ld.in"
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@gcc `cat src/arch/$(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 src/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 $(BUILD_DIR)
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@echo "[tools:offsets] calculating OS/arch-specific offsets for g, m and stack structs"
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@GOPATH=$(GOPATH) $(GO) run tools/offsets/offsets.go -target-os $(GOOS) -target-arch $(GOARCH) -go-binary $(GO) -out $@
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$(BUILD_DIR)/arch/$(ARCH)/asm/%.o: src/arch/$(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) $(BUILD_DIR)/isofiles/boot/kernel.bin
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@cp src/arch/$(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
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.PHONY: kernel iso vagrant-up vagrant-down vagrant-ssh run gdb clean lint lint-check-deps test collect-coverage
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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 $(BUILD_DIR) || true
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lint: lint-check-deps
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@echo "[gometalinter] linting sources"
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@gometalinter.v1 \
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--disable-all \
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--enable=deadcode \
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--enable=errcheck \
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--enable=gosimple \
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--enable=ineffassign \
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--enable=misspell \
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--enable=staticcheck \
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--enable=vet \
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--enable=vetshadow \
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--enable=unconvert \
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--enable=varcheck \
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--enable=golint \
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--deadline 300s \
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--exclude 'return value not checked' \
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--exclude 'possible misuse of unsafe.Pointer' \
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--exclude 'x \^ 0 always equals x' \
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./...
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lint-check-deps:
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@GOPATH=$(GOPATH) $(GO) get -u -t gopkg.in/alecthomas/gometalinter.v1
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@gometalinter.v1 --install >/dev/null
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test:
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GOPATH=$(GOPATH) $(GO) test -cover gopheros/...
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collect-coverage:
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GOPATH=$(GOPATH) sh coverage.sh
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