| # 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 |
| |
| BOOT_SHIM_DIR := $(GET_LOCAL_DIR) |
| |
| ifeq ($(PLATFORM_BOARD_NAME),) |
| $(error PLATFORM_BOARD_NAME not defined) |
| endif |
| |
| BOOT_SHIM_BUILDDIR := $(BUILDDIR)/boot-shim/$(PLATFORM_BOARD_NAME) |
| |
| BOOT_SHIM_SRCS := \ |
| $(BOOT_SHIM_DIR)/boot-shim.S \ |
| $(BOOT_SHIM_DIR)/boot-shim.c \ |
| $(BOOT_SHIM_DIR)/debug.c \ |
| $(BOOT_SHIM_DIR)/devicetree.c \ |
| $(BOOT_SHIM_DIR)/util.c \ |
| $(BOOT_SHIM_DIR)/$(PLATFORM_BOARD_NAME)-uart.c \ |
| kernel/lib/libc/string/memcpy.c \ |
| kernel/lib/libc/string/memmove.c \ |
| kernel/lib/libc/string/memset.c \ |
| kernel/lib/libc/string/strcmp.c \ |
| kernel/lib/libc/string/strncmp.c \ |
| system/ulib/libzbi/zbi.c \ |
| |
| BOOT_SHIM_OBJS := $(BOOT_SHIM_SRCS:%=$(BOOT_SHIM_BUILDDIR)/%.o) |
| |
| ALLSRCS += $(BOOT_SHIM_SRCS) |
| ALLOBJS += $(BOOT_SHIM_OBJS) |
| |
| BOOT_SHIM_LD := $(BOOT_SHIM_DIR)/boot-shim.ld |
| BOOT_SHIM_ELF := $(BOOT_SHIM_BUILDDIR)/boot-shim.elf |
| BOOT_SHIM_BIN := $(BUILDDIR)/$(PLATFORM_BOARD_NAME)-boot-shim.bin |
| |
| KERNEL_ALIGN := 65536 |
| SHIM_DEFINES := -DKERNEL_ALIGN=$(KERNEL_ALIGN) |
| SHIM_INCLUDES := -Ikernel/include -Ikernel/lib/libc/include -Isystem/public |
| SHIM_INCLUDES += -Ikernel/arch/arm64/include |
| SHIM_INCLUDES += -Isystem/ulib/ddk/include # for ddk/protocol/platform-defs.h |
| SHIM_INCLUDES += -Isystem/ulib/libzbi/include |
| SHIM_CFLAGS := $(NO_SAFESTACK) $(NO_SANITIZERS) |
| |
| # The shim code runs with alignment checking enabled, so make sure the |
| # compiler doesn't use any unaligned memory accesses. |
| SHIM_CFLAGS += -mstrict-align |
| |
| # for including target specific headers |
| SHIM_INCLUDES += -Ikernel/target/arm64/board/$(PLATFORM_BOARD_NAME) |
| |
| # capture board specific variables for the build rules |
| $(BOOT_SHIM_BIN): BOOT_SHIM_BUILDDIR:=$(BOOT_SHIM_BUILDDIR) |
| $(BOOT_SHIM_BIN): BOOT_SHIM_OBJS:=$(BOOT_SHIM_OBJS) |
| $(BOOT_SHIM_BIN): BOOT_SHIM_ELF:=$(BOOT_SHIM_ELF) |
| $(BOOT_SHIM_BIN): BOOT_SHIM_BIN:=$(BOOT_SHIM_BIN) |
| $(BOOT_SHIM_BIN): SHIM_INCLUDES:=$(SHIM_INCLUDES) |
| |
| $(BOOT_SHIM_BUILDDIR)/%.S.o: %.S |
| @$(MKDIR) |
| $(call BUILDECHO, compiling $<) |
| $(NOECHO)$(CC) $(SHIM_INCLUDES) $(SHIM_DEFINES) $(GLOBAL_COMPILEFLAGS) $(ARCH_COMPILEFLAGS) $(GLOBAL_OPTFLAGS) $(GLOBAL_ASMFLAGS) $(KERNEL_ASMFLAGS) $(ARCH_ASMFLAGS) -c $< -MMD -MP -MT $@ -MF $(@:%o=%d) -o $@ |
| |
| $(BOOT_SHIM_BUILDDIR)/%.c.o: %.c |
| @$(MKDIR) |
| $(call BUILDECHO, compiling $<) |
| $(NOECHO)$(CC) $(SHIM_INCLUDES) $(SHIM_DEFINES) $(GLOBAL_COMPILEFLAGS) $(KERNEL_COMPILEFLAGS) $(ARCH_COMPILEFLAGS) $(GLOBAL_OPTFLAGS) $(GLOBAL_CFLAGS) $(KERNEL_CFLAGS) $(ARCH_CFLAGS) $(SHIM_CFLAGS) -c $< -MMD -MP -MT $@ -MF $(@:%o=%d) -o $@ |
| |
| $(BOOT_SHIM_ELF): $(BOOT_SHIM_OBJS) $(BOOT_SHIM_LD) |
| $(call BUILDECHO,linking $@) |
| $(NOECHO)$(LD) $(GLOBAL_LDFLAGS) $(KERNEL_LDFLAGS) --build-id=none $(BOOT_SHIM_OBJS) -defsym KERNEL_ALIGN=$(KERNEL_ALIGN) -T $(BOOT_SHIM_LD) -o $@ |
| |
| # The shim code should be purely position-independent code. |
| $(BOOT_SHIM_ELF).pure-stamp: $(BOOT_SHIM_ELF) scripts/gen-kaslr-fixups.sh |
| $(call BUILDECHO,checking $<) |
| $(NOECHO)scripts/gen-kaslr-fixups.sh '$(READELF)' '$(OBJDUMP)' \ |
| --pure $< $@ |
| |
| $(BOOT_SHIM_BIN): $(BOOT_SHIM_ELF) $(BOOT_SHIM_ELF).pure-stamp |
| $(call BUILDECHO,generating $@) |
| $(NOECHO)$(OBJCOPY) -O binary $< $@ |
| GENERATED += $(BOOT_SHIM_BIN) |
| EXTRA_BUILDDEPS += $(BOOT_SHIM_BIN) |