diff options
| -rw-r--r-- | pc-bios/optionrom/Makefile | 67 |
1 files changed, 41 insertions, 26 deletions
diff --git a/pc-bios/optionrom/Makefile b/pc-bios/optionrom/Makefile index e33a24d..51cb6ca 100644 --- a/pc-bios/optionrom/Makefile +++ b/pc-bios/optionrom/Makefile @@ -1,13 +1,16 @@ -all: build-all +CURRENT_MAKEFILE := $(realpath $(word $(words $(MAKEFILE_LIST)),$(MAKEFILE_LIST))) +SRC_DIR := $(dir $(CURRENT_MAKEFILE)) +TOPSRC_DIR := $(SRC_DIR)/../.. +VPATH = $(SRC_DIR) + +all: multiboot.bin linuxboot.bin linuxboot_dma.bin kvmvapic.bin pvh.bin # Dummy command so that make thinks it has done something @true include ../../config-host.mak -include $(SRC_PATH)/rules.mak - -$(call set-vpath, $(SRC_PATH)/pc-bios/optionrom) -.PHONY : all clean build-all +quiet-command = $(if $(V),$1,$(if $(2),@printf " %-7s %s\n" $2 $3 && $1, @$1)) +cc-option = $(if $(shell $(CC) $1 -S -o /dev/null -xc /dev/null >/dev/null 2>&1 && echo OK), $1, $2) # Compiling with no optimization creates ROMs that are too large ifeq ($(lastword $(filter -O%, -O0 $(CFLAGS))),-O0) @@ -15,48 +18,60 @@ override CFLAGS += -O2 endif override CFLAGS += -march=i486 -# Drop -fstack-protector and the like -QEMU_CFLAGS := $(filter -W%, $(QEMU_CFLAGS)) $(CFLAGS_NOPIE) -ffreestanding -QEMU_CFLAGS += $(call cc-option, $(QEMU_CFLAGS), -fno-stack-protector) -QEMU_CFLAGS += $(call cc-option, $(QEMU_CFLAGS), -m16) -ifeq ($(filter -m16, $(QEMU_CFLAGS)),) +# Flags for dependency generation +override CPPFLAGS += -MMD -MP -MT $@ -MF $(@D)/$(*F).d + +override CFLAGS += $(filter -W%, $(QEMU_CFLAGS)) +override CFLAGS += $(CFLAGS_NOPIE) -ffreestanding -I$(TOPSRC_DIR)/include +override CFLAGS += $(call cc-option, -fno-stack-protector) +override CFLAGS += $(call cc-option, -m16) + +ifeq ($(filter -m16, $(CFLAGS)),) # Attempt to work around compilers that lack -m16 (GCC <= 4.8, clang <= ??) # On GCC we add -fno-toplevel-reorder to keep the order of asm blocks with # respect to the rest of the code. clang does not have -fno-toplevel-reorder, # but it places all asm blocks at the beginning and we're relying on it for # the option ROM header. So just force clang not to use the integrated # assembler, which doesn't support .code16gcc. -QEMU_CFLAGS += $(call cc-option, $(QEMU_CFLAGS), -fno-toplevel-reorder) -QEMU_CFLAGS += $(call cc-option, $(QEMU_CFLAGS), -no-integrated-as) -QEMU_CFLAGS += -m32 -include $(SRC_PATH)/pc-bios/optionrom/code16gcc.h +override CFLAGS += $(call cc-option, -fno-toplevel-reorder) +override CFLAGS += $(call cc-option, -no-integrated-as) +override CFLAGS += -m32 -include $(SRC_DIR)/code16gcc.h endif -QEMU_INCLUDES += -I$(SRC_PATH) - Wa = -Wa, -ASFLAGS += -32 -QEMU_CFLAGS += $(call cc-c-option, $(QEMU_CFLAGS), $(Wa)-32) +override ASFLAGS += -32 +override CFLAGS += $(call cc-option, $(Wa)-32) -build-all: multiboot.bin linuxboot.bin linuxboot_dma.bin kvmvapic.bin pvh.bin -# suppress auto-removal of intermediate files -.SECONDARY: +LD_I386_EMULATION ?= elf_i386 +override LDFLAGS = -m $(LD_I386_EMULATION) -T $(SRC_DIR)/flat.lds +override LDFLAGS += $(LDFLAGS_NOPIE) +all: multiboot.bin linuxboot.bin linuxboot_dma.bin kvmvapic.bin pvh.bin + +pvh.img: pvh.o pvh_main.o %.o: %.S - $(call quiet-command,$(CPP) $(QEMU_INCLUDES) $(QEMU_DGFLAGS) -c -o - $< | $(AS) $(ASFLAGS) -o $@,"AS","$(TARGET_DIR)$@") + $(call quiet-command,$(CPP) $(CPPFLAGS) -c -o - $< | $(AS) $(ASFLAGS) -o $@,"AS","$@") -pvh.img: pvh.o pvh_main.o - $(call quiet-command,$(LD) $(LDFLAGS_NOPIE) -m $(LD_I386_EMULATION) -T $(SRC_PATH)/pc-bios/optionrom/flat.lds -s -o $@ $^,"BUILD","$(TARGET_DIR)$@") +%.o: %.c + $(call quiet-command,$(CC) $(CPPFLAGS) $(CFLAGS) -c $< -o $@,"CC","$@") %.img: %.o - $(call quiet-command,$(LD) $(LDFLAGS_NOPIE) -m $(LD_I386_EMULATION) -T $(SRC_PATH)/pc-bios/optionrom/flat.lds -s -o $@ $<,"BUILD","$(TARGET_DIR)$@") + $(call quiet-command,$(LD) $(LDFLAGS) -s -o $@ $^,"BUILD","$@") %.raw: %.img - $(call quiet-command,$(OBJCOPY) -O binary -j .text $< $@,"BUILD","$(TARGET_DIR)$@") + $(call quiet-command,$(OBJCOPY) -O binary -j .text $< $@,"BUILD","$@") %.bin: %.raw - $(call quiet-command,$(PYTHON) $(SRC_PATH)/scripts/signrom.py $< $@,"SIGN","$(TARGET_DIR)$@") + $(call quiet-command,$(PYTHON) $(TOPSRC_DIR)/scripts/signrom.py $< $@,"SIGN","$@") + +include $(wildcard *.d) clean: rm -f *.o *.d *.raw *.img *.bin *~ + +# suppress auto-removal of intermediate files +.SECONDARY: + +.PHONY: all clean |