| # Copyright 2018 The Fuchsia Authors |
| # |
| # Use of this source code is governed by a MIT-style |
| # license that can be found in the LICENSE file or at |
| # https://opensource.org/licenses/MIT |
| |
| LOCAL_DIR := $(GET_LOCAL_DIR) |
| |
| MULTIBOOT_BIN := $(BUILDDIR)/multiboot.bin |
| MULTIBOOT_ELF := $(BUILDDIR)/multiboot.elf |
| |
| MULTIBOOT_LDFLAGS := -m elf_i386 |
| MULTIBOOT_LDSCRIPT := $(LOCAL_DIR)/multiboot.ld |
| MULTIBOOT_COMPILEFLAGS := \ |
| $(NO_SAFESTACK) $(NO_SANITIZERS) \ |
| -m32 -mregparm=3 -fno-pic \ |
| -Ikernel/arch/x86/page_tables/include \ |
| -Ikernel/platform/pc/include \ |
| -Isystem/ulib/zbi/include |
| MULTIBOOT_SRCDEPS := $(KERNEL_CONFIG_HEADER) |
| |
| MULTIBOOT_SRCS := \ |
| $(LOCAL_DIR)/multiboot-start.S \ |
| $(LOCAL_DIR)/multiboot-main.c \ |
| $(LOCAL_DIR)/paging.c \ |
| $(LOCAL_DIR)/trampoline.c \ |
| $(LOCAL_DIR)/util.c \ |
| system/ulib/libzbi/zbi.c |
| |
| MULTIBOOT_OBJS := $(MULTIBOOT_SRCS:%=$(BUILDDIR)/$(LOCAL_DIR)/%.o) |
| |
| $(filter %.S.o,$(MULTIBOOT_OBJS)): \ |
| $(BUILDDIR)/$(LOCAL_DIR)/%.S.o: %.S $(MULTIBOOT_SRCDEPS) |
| @$(MKDIR) |
| $(call BUILDECHO, assembling $<) |
| $(NOECHO)$(CC) $(GLOBAL_COMPILEFLAGS) $(ARCH_COMPILEFLAGS) \ |
| $(GLOBAL_OPTFLAGS) $(GLOBAL_ASMFLAGS) \ |
| $(KERNEL_ASMFLAGS) $(ARCH_ASMFLAGS) \ |
| $(KERNEL_COMPILEFLAGS) $(MULTIBOOT_COMPILEFLAGS) \ |
| $(KERNEL_INCLUDES) $(GLOBAL_INCLUDES) \ |
| -c $< -MMD -MP -MT $@ -MF $(@:%o=%d) -o $@ |
| |
| $(filter %.c.o,$(MULTIBOOT_OBJS)): \ |
| $(BUILDDIR)/$(LOCAL_DIR)/%.c.o: %.c $(MULTIBOOT_SRCDEPS) |
| @$(MKDIR) |
| $(call BUILDECHO, compiling $<) |
| $(NOECHO)$(CC) $(GLOBAL_COMPILEFLAGS) $(ARCH_COMPILEFLAGS) \ |
| $(GLOBAL_OPTFLAGS) $(GLOBAL_CFLAGS) \ |
| $(KERNEL_CFLAGS) $(ARCH_CFLAGS) \ |
| $(KERNEL_COMPILEFLAGS) $(MULTIBOOT_COMPILEFLAGS) \ |
| $(KERNEL_INCLUDES) $(GLOBAL_INCLUDES) \ |
| -c $< -MMD -MP -MT $@ -MF $(@:%o=%d) -o $@ |
| |
| ALLSRCS += $(MULTIBOOT_SRCS) |
| ALLOBJS += $(MULTIBOOT_OBJS) |
| |
| $(MULTIBOOT_ELF): $(MULTIBOOT_LDSCRIPT) $(MULTIBOOT_OBJS) |
| $(call BUILDECHO,linking $@) |
| $(NOECHO)$(LD) $(GLOBAL_LDFLAGS) $(KERNEL_LDFLAGS) \ |
| $(MULTIBOOT_LDFLAGS) -o $@ -T $^ |
| GENERATED += $(MULTIBOOT_ELF) |
| EXTRA_IDFILES += $(MULTIBOOT_ELF).id |
| |
| # We could make a Multiboot image meant to be loaded without ELF headers |
| # and do `objcopy -O binary` here. But there's no reason to, and having an |
| # ELF binary to look at is nicer. To remove the ELF headers instead, the |
| # linker script would need to remove `+ SIZEOF_HEADERS` and then the |
| # multiboot header would be first thing in the raw binary. |
| $(MULTIBOOT_BIN): $(MULTIBOOT_ELF).strip |
| $(call BUILDECHO, generating $@) |
| $(NOECHO)ln -f $< $@ |
| GENERATED += $(MULTIBOOT_BIN) $(MULTIBOOT_ELF).strip |
| |
| # Build the multiboot trampoline whenever building the kernel. |
| kernel: $(MULTIBOOT_BIN) |
