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Makefile
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## SPDX-License-Identifier: MIT OR Apache-2.0
##
## Copyright (c) 2018-2022 Andre Richter <[email protected]>
include docker.mk
include format.mk
include operating_system.mk
##--------------------------------------------------------------------------------------------------
## Optional, user-provided configuration values
##--------------------------------------------------------------------------------------------------
##--------------------------------------------------------------------------------------------------
## BSP-specific configuration values
##--------------------------------------------------------------------------------------------------
QEMU_MISSING_STRING = "This board is not yet supported for QEMU."
TARGET = aarch64-unknown-none-softfloat
KERNEL_BIN = kernel8.img
QEMU_BINARY = qemu-system-aarch64
QEMU_MACHINE_TYPE = raspi3b
QEMU_RELEASE_ARGS = -d in_asm -display none
OBJDUMP_BINARY = aarch64-none-elf-objdump
NM_BINARY = aarch64-none-elf-nm
READELF_BINARY = aarch64-none-elf-readelf
LD_SCRIPT_PATH = $(shell pwd)
RUSTC_MISC_ARGS = -C target-cpu=cortex-a53
# Export for build.rs.
export LD_SCRIPT_PATH
##--------------------------------------------------------------------------------------------------
## Targets and Prerequisites
##--------------------------------------------------------------------------------------------------
KERNEL_MANIFEST = Cargo.toml
KERNEL_LINKER_SCRIPT = linker.ld
LAST_BUILD_CONFIG = target/$(BSP).build_config
KERNEL_ELF = target/$(TARGET)/release/rusty-pi
# This parses cargo's dep-info file.
# https://doc.rust-lang.org/cargo/guide/build-cache.html#dep-info-files
KERNEL_ELF_DEPS = $(filter-out %: ,$(file < $(KERNEL_ELF).d)) $(KERNEL_MANIFEST) $(LAST_BUILD_CONFIG)
##--------------------------------------------------------------------------------------------------
## Command building blocks
##--------------------------------------------------------------------------------------------------
RUSTFLAGS = $(RUSTC_MISC_ARGS) \
-C link-arg=--library-path=$(LD_SCRIPT_PATH) \
-C link-arg=--script=$(KERNEL_LINKER_SCRIPT)
RUSTFLAGS_PEDANTIC = $(RUSTFLAGS) \
COMPILER_ARGS = --target=$(TARGET) \
--release
RUSTC_CMD = cargo rustc $(COMPILER_ARGS)
DOC_CMD = cargo doc $(COMPILER_ARGS)
CLIPPY_CMD = cargo clippy $(COMPILER_ARGS)
OBJCOPY_CMD = rust-objcopy \
--strip-all \
-O binary
EXEC_QEMU = $(QEMU_BINARY) -M $(QEMU_MACHINE_TYPE)
##------------------------------------------------------------------------------
## Dockerization
##------------------------------------------------------------------------------
DOCKER_CMD = docker run -t --rm -v $(shell pwd):/work/tutorial -w /work/tutorial
DOCKER_CMD_INTERACT = $(DOCKER_CMD) -i
# DOCKER_IMAGE defined in include file (see top of this file).
DOCKER_QEMU = $(DOCKER_CMD_INTERACT) $(DOCKER_IMAGE)
DOCKER_TOOLS = $(DOCKER_CMD) $(DOCKER_IMAGE)
##--------------------------------------------------------------------------------------------------
## Targets
##--------------------------------------------------------------------------------------------------
.PHONY: all doc qemu clippy clean readelf objdump nm check
all: $(KERNEL_BIN)
##------------------------------------------------------------------------------
## Save the configuration as a file, so make understands if it changed.
##------------------------------------------------------------------------------
$(LAST_BUILD_CONFIG):
@rm -f target/*.build_config
@mkdir -p target
@touch $(LAST_BUILD_CONFIG)
##------------------------------------------------------------------------------
## Compile the kernel ELF
##------------------------------------------------------------------------------
$(KERNEL_ELF): $(KERNEL_ELF_DEPS)
$(call color_header, "Compiling kernel ELF - $(BSP)")
@RUSTFLAGS="$(RUSTFLAGS_PEDANTIC)" $(RUSTC_CMD)
##------------------------------------------------------------------------------
## Generate the stripped kernel binary
##------------------------------------------------------------------------------
$(KERNEL_BIN): $(KERNEL_ELF)
$(call color_header, "Generating stripped binary")
@$(OBJCOPY_CMD) $(KERNEL_ELF) $(KERNEL_BIN)
$(call color_progress_prefix, "Name")
@echo $(KERNEL_BIN)
$(call color_progress_prefix, "Size")
$(call disk_usage_KiB, $(KERNEL_BIN))
##------------------------------------------------------------------------------
## Generate the documentation
##------------------------------------------------------------------------------
doc:
$(call color_header, "Generating docs")
@$(DOC_CMD) --document-private-items --open
##------------------------------------------------------------------------------
## Run the kernel in QEMU
##------------------------------------------------------------------------------
ifeq ($(QEMU_MACHINE_TYPE),) # QEMU is not supported for the board.
qemu:
$(call color_header, "$(QEMU_MISSING_STRING)")
else # QEMU is supported.
qemu: $(KERNEL_BIN)
$(call color_header, "Launching QEMU")
@$(DOCKER_QEMU) $(EXEC_QEMU) $(QEMU_RELEASE_ARGS) -kernel $(KERNEL_BIN)
endif
##------------------------------------------------------------------------------
## Run clippy
##------------------------------------------------------------------------------
clippy:
@RUSTFLAGS="$(RUSTFLAGS_PEDANTIC)" $(CLIPPY_CMD)
##------------------------------------------------------------------------------
## Clean
##------------------------------------------------------------------------------
clean:
rm -rf target $(KERNEL_BIN)
##------------------------------------------------------------------------------
## Run readelf
##------------------------------------------------------------------------------
readelf: $(KERNEL_ELF)
$(call color_header, "Launching readelf")
@$(DOCKER_TOOLS) $(READELF_BINARY) --headers $(KERNEL_ELF)
##------------------------------------------------------------------------------
## Run objdump
##------------------------------------------------------------------------------
objdump: $(KERNEL_ELF)
$(call color_header, "Launching objdump")
@$(DOCKER_TOOLS) $(OBJDUMP_BINARY) --disassemble --demangle \
--section .text \
$(KERNEL_ELF) | rustfilt
##------------------------------------------------------------------------------
## Run nm
##------------------------------------------------------------------------------
nm: $(KERNEL_ELF)
$(call color_header, "Launching nm")
@$(DOCKER_TOOLS) $(NM_BINARY) --demangle --print-size $(KERNEL_ELF) | sort | rustfilt