| # Legacy Bios build system |
| # |
| # Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net> |
| # |
| # This file may be distributed under the terms of the GNU LGPLv3 license. |
| |
| # Output directory |
| OUT=out/ |
| |
| # Source files |
| SRCBOTH=output.c util.c floppy.c ata.c misc.c mouse.c kbd.c pci.c \ |
| serial.c clock.c pic.c cdrom.c ps2port.c smpdetect.c resume.c \ |
| pnpbios.c pirtable.c |
| SRC16=$(SRCBOTH) system.c disk.c apm.c pcibios.c vgahooks.c font.c |
| SRC32=$(SRCBOTH) post.c shadow.c post_menu.c memmap.c coreboot.c boot.c \ |
| acpi.c smm.c mptable.c smbios.c pciinit.c optionroms.c mtrr.c |
| |
| cc-option = $(shell if test -z "`$(1) $(2) -S -o /dev/null -xc \ |
| /dev/null 2>&1`"; then echo "$(2)"; else echo "$(3)"; fi ;) |
| |
| # Default compiler flags |
| COMMONCFLAGS = -Wall -Os -MD -m32 -march=i386 -mregparm=3 \ |
| -mpreferred-stack-boundary=2 -mrtd \ |
| -ffreestanding -fwhole-program -fomit-frame-pointer \ |
| -fno-delete-null-pointer-checks -Wno-strict-aliasing |
| COMMONCFLAGS += $(call cc-option,$(CC),-nopie,) |
| COMMONCFLAGS += $(call cc-option,$(CC),-fno-stack-protector,) |
| COMMONCFLAGS += $(call cc-option,$(CC),-fno-stack-protector-all,) |
| |
| override CFLAGS = $(COMMONCFLAGS) -g -DMODE16=0 |
| CFLAGS16INC = $(COMMONCFLAGS) -DMODE16=1 -fno-jump-tables -fno-defer-pop \ |
| $(call cc-option,$(CC),--param large-stack-frame=4,) |
| CFLAGS16INC += -ffunction-sections -fdata-sections |
| CFLAGS16 = $(CFLAGS16INC) -g |
| |
| all: $(OUT) $(OUT)bios.bin |
| |
| # Run with "make V=1" to see the actual compile commands |
| ifdef V |
| Q= |
| else |
| Q=@ |
| endif |
| |
| OBJCOPY=objcopy |
| OBJDUMP=objdump |
| NM=nm |
| STRIP=strip |
| |
| .PHONY : all FORCE |
| |
| vpath %.c src |
| vpath %.S src |
| |
| ################ Build rules |
| |
| # Do a whole file compile - two methods are supported. The first |
| # involves including all the content textually via #include |
| # directives. The second method uses gcc's "-combine" option. |
| ifdef AVOIDCOMBINE |
| define whole-compile |
| @echo " Compiling whole program $3" |
| $(Q)printf '$(foreach i,$2,#include "../$i"\n)' > $3.tmp.c |
| $(Q)$(CC) $1 -c $3.tmp.c -o $3 |
| endef |
| else |
| define whole-compile |
| @echo " Compiling whole program $3" |
| $(Q)$(CC) $1 -combine -c $2 -o $3 |
| endef |
| endif |
| |
| |
| $(OUT)%.s: %.c |
| @echo " Compiling to assembler $@" |
| $(Q)$(CC) $(CFLAGS16INC) -S -c $< -o $@ |
| |
| $(OUT)%.lds: %.lds.S |
| @echo " Precompiling $@" |
| $(Q)$(CPP) -P -D__ASSEMBLY__ $< -o $@ |
| |
| $(OUT)asm-offsets.h: $(OUT)asm-offsets.s |
| @echo " Generating offset file $@" |
| $(Q)./tools/gen-offsets.sh $< $@ |
| |
| $(OUT)ccode.16.s: ; $(call whole-compile, $(CFLAGS16) -S, $(addprefix src/, $(SRC16)),$@) |
| |
| $(OUT)romlayout16.o: romlayout.S $(OUT)ccode.16.s $(OUT)asm-offsets.h |
| @echo " Compiling (16bit) $@" |
| $(Q)$(CC) $(CFLAGS16INC) -c -D__ASSEMBLY__ $< -o $@ |
| |
| $(OUT)ccode32.o: ; $(call whole-compile, $(CFLAGS), $(addprefix src/, $(SRC32)),$@) |
| |
| $(OUT)rom32.o: $(OUT)ccode32.o $(OUT)rombios32.lds |
| @echo " Linking (no relocs) $@" |
| $(Q)$(LD) -r -d -T $(OUT)rombios32.lds $< -o $@ |
| |
| $(OUT)romlayout.lds: $(OUT)romlayout16.o |
| @echo " Building layout information $@" |
| $(Q)$(OBJDUMP) -h $< | ./tools/layoutrom.py $@ |
| |
| $(OUT)rombios16.lds: $(OUT)romlayout.lds |
| |
| $(OUT)rom16.o: $(OUT)romlayout16.o $(OUT)rom32.o $(OUT)rombios16.lds |
| @echo " Linking (16bit) $@" |
| $(Q)$(OBJCOPY) --prefix-symbols=_code32_ $(OUT)rom32.o $(OUT)rom32.rename.o |
| $(Q)$(LD) -T $(OUT)rombios16.lds -R $(OUT)rom32.rename.o $< -o $@ |
| |
| $(OUT)rom.o: $(OUT)rom16.o $(OUT)rom32.o $(OUT)rombios.lds |
| @echo " Linking $@" |
| $(Q)$(LD) -T $(OUT)rombios.lds $(OUT)rom16.o $(OUT)rom32.o -o $@ |
| |
| $(OUT)bios.bin.elf: $(OUT)rom.o |
| @echo " Prepping $@" |
| $(Q)$(NM) $< | ./tools/checkrom.py |
| $(Q)$(STRIP) $< -o $@ |
| |
| $(OUT)bios.bin: $(OUT)bios.bin.elf |
| @echo " Extracting binary $@" |
| $(Q)$(OBJCOPY) -O binary $< $@ |
| |
| |
| ####### Generic rules |
| clean: |
| $(Q)rm -rf $(OUT) |
| |
| $(OUT): |
| $(Q)mkdir $@ |
| |
| -include $(OUT)*.d |