| # Legacy Bios build system |
| # |
| # Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net> |
| # |
| # This file may be distributed under the terms of the GNU GPLv3 license. |
| |
| # Output directory |
| OUT=out/ |
| |
| # Source files |
| SRCBOTH=output.c util.c floppy.c ata.c system.c mouse.c kbd.c pci.c boot.c \ |
| serial.c clock.c pic.c |
| SRC16=$(SRCBOTH) disk.c cdrom.c apm.c pcibios.c |
| SRC32=$(SRCBOTH) post.c shadow.c rombios32.c post_menu.c memmap.c coreboot.c \ |
| acpi.c pirtable.c smm.c |
| TABLESRC=font.c cbt.c floppy_dbt.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 |
| COMMONCFLAGS += $(call cc-option,$(CC),-nopie,) |
| COMMONCFLAGS += $(call cc-option,$(CC),-fno-stack-protector,) |
| COMMONCFLAGS += $(call cc-option,$(CC),-fno-stack-protector-all,) |
| |
| CFLAGS = $(COMMONCFLAGS) -g |
| CFLAGS16INC = $(COMMONCFLAGS) -DMODE16 -fno-jump-tables -fno-defer-pop \ |
| $(call cc-option,$(CC),--param large-stack-frame=8,) |
| CFLAGS16 = $(CFLAGS16INC) -g |
| |
| TABLETMP=$(addprefix $(OUT), $(patsubst %.c,%.16.s,$(TABLESRC))) |
| all: $(OUT) $(OUT)bios.bin $(TABLETMP) |
| |
| # Run with "make V=1" to see the actual compile commands |
| ifdef V |
| Q= |
| else |
| Q=@ |
| endif |
| |
| .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 |
| DEPHACK= |
| define whole-compile |
| @echo " Compiling whole program $3" |
| $(Q)/bin/echo -e '$(foreach i,$2,#include "../$i"\n)' > $3.tmp.c |
| $(Q)$(CC) $1 -c $3.tmp.c -o $3 |
| endef |
| else |
| # Ugly way to get gcc to generate .d files correctly. |
| DEPHACK=-combine src/null.c |
| define whole-compile |
| @echo " Compiling whole program $3" |
| $(Q)$(CC) $1 -combine -c $2 -o $3 |
| endef |
| endif |
| |
| |
| $(OUT)%.proc.16.s: $(OUT)%.16.s |
| @echo " Moving data sections to text in $<" |
| $(Q)sed 's/\t\.section\t\.rodata.*// ; s/\t\.data//' < $< > $@ |
| |
| $(OUT)%.16.s: %.c |
| @echo " Generating assembler for $<" |
| $(Q)$(CC) $(CFLAGS16INC) $(DEPHACK) -S -c $< -o $@ |
| |
| $(OUT)%.lds: %.lds.S |
| @echo " Precompiling $<" |
| $(Q)$(CPP) -P $< -o $@ |
| |
| $(OUT)%.bin: $(OUT)%.o |
| @echo " Extracting binary $@" |
| $(Q)objcopy -O binary $< $@ |
| |
| $(OUT)%.offset.auto.h: $(OUT)%.o |
| @echo " Generating symbol offset header $@" |
| $(Q)nm $< | ./tools/defsyms.py $@ |
| |
| $(OUT)blob.16.s: ; $(call whole-compile, $(CFLAGS16) -S, $(addprefix src/, $(SRC16)),$@) |
| |
| TABLEASM=$(addprefix $(OUT), $(patsubst %.c,%.proc.16.s,$(TABLESRC))) |
| $(OUT)romlayout16.o: romlayout.S $(OUT)blob.16.s $(TABLEASM) |
| @echo " Generating 16bit layout of $@" |
| $(Q)$(CC) $(CFLAGS16) -c $< -o $@ |
| |
| $(OUT)rom16.o: $(OUT)romlayout16.o $(OUT)rombios16.lds |
| @echo " Linking $@" |
| $(Q)ld -T $(OUT)rombios16.lds $< -o $@ |
| |
| $(OUT)romlayout32.o: $(OUT)rom16.offset.auto.h ; $(call whole-compile, $(CFLAGS), $(addprefix src/, $(SRC32)),$@) |
| |
| $(OUT)rom32.o: $(OUT)romlayout32.o $(OUT)rombios32.lds |
| @echo " Linking $@" |
| $(Q)ld -T $(OUT)rombios32.lds $< -o $@ |
| |
| $(OUT)bios.bin: $(OUT)rom16.bin $(OUT)rom32.bin $(OUT)rom16.offset.auto.h $(OUT)rom32.offset.auto.h |
| @echo " Building $@" |
| $(Q)./tools/buildrom.py |
| |
| ####### Generic rules |
| clean: |
| rm -rf $(OUT) |
| |
| $(OUT): |
| mkdir $@ |
| |
| -include $(OUT)*.d |