3 # Copyright (C) 2008,2009 Kevin O'Connor <kevin@koconnor.net>
5 # This file may be distributed under the terms of the GNU LGPLv3 license.
11 SRCBOTH=output.c util.c floppy.c ata.c misc.c mouse.c kbd.c pci.c \
12 serial.c clock.c pic.c cdrom.c ps2port.c smpdetect.c resume.c \
14 SRC16=$(SRCBOTH) system.c disk.c apm.c pcibios.c vgahooks.c font.c
15 SRC32=$(SRCBOTH) post.c shadow.c memmap.c coreboot.c boot.c \
16 acpi.c smm.c mptable.c smbios.c pciinit.c optionroms.c mtrr.c \
19 cc-option = $(shell if test -z "`$(1) $(2) -S -o /dev/null -xc \
20 /dev/null 2>&1`"; then echo "$(2)"; else echo "$(3)"; fi ;)
22 # Default compiler flags
23 COMMONCFLAGS = -Wall -Os -MD -m32 -march=i386 -mregparm=3 \
24 -mpreferred-stack-boundary=2 -mrtd -freg-struct-return \
25 -ffreestanding -fwhole-program -fomit-frame-pointer \
26 -fno-delete-null-pointer-checks -Wno-strict-aliasing \
27 -ffunction-sections -fdata-sections \
28 -minline-all-stringops
29 COMMONCFLAGS += $(call cc-option,$(CC),-nopie,)
30 COMMONCFLAGS += $(call cc-option,$(CC),-fno-stack-protector,)
31 COMMONCFLAGS += $(call cc-option,$(CC),-fno-stack-protector-all,)
33 override CFLAGS = $(COMMONCFLAGS) -g -DMODE16=0
34 CFLAGS16INC = $(COMMONCFLAGS) -DMODE16=1 -fno-jump-tables -fno-defer-pop \
35 $(call cc-option,$(CC),-fno-tree-switch-conversion,) \
36 $(call cc-option,$(CC),--param large-stack-frame=4,)
37 CFLAGS16 = $(CFLAGS16INC) -g
39 all: $(OUT) $(OUT)bios.bin
41 # Run with "make V=1" to see the actual compile commands
58 ################ Build rules
60 TESTGCC:=$(shell CC=$(CC) tools/test-gcc.sh)
61 ifeq "$(TESTGCC)" "-1"
62 $(error "Please upgrade GCC")
66 AVOIDCOMBINE=$(TESTGCC)
69 # Do a whole file compile - two methods are supported. The first
70 # involves including all the content textually via #include
71 # directives. The second method uses gcc's "-combine" option.
72 ifeq "$(AVOIDCOMBINE)" "1"
74 @echo " Compiling whole program $3"
75 $(Q)printf '$(foreach i,$2,#include "../$i"\n)' > $3.tmp.c
76 $(Q)$(CC) $1 -c $3.tmp.c -o $3
80 @echo " Compiling whole program $3"
81 $(Q)$(CC) $1 -combine -c $2 -o $3
87 @echo " Compiling to assembler $@"
88 $(Q)$(CC) $(CFLAGS16INC) -S -c $< -o $@
91 @echo " Precompiling $@"
92 $(Q)$(CPP) -P -D__ASSEMBLY__ $< -o $@
94 $(OUT)asm-offsets.h: $(OUT)asm-offsets.s
95 @echo " Generating offset file $@"
96 $(Q)./tools/gen-offsets.sh $< $@
98 $(OUT)ccode.16.s: ; $(call whole-compile, $(CFLAGS16) -S, $(addprefix src/, $(SRC16)),$@)
100 $(OUT)romlayout16.o: romlayout.S $(OUT)ccode.16.s $(OUT)asm-offsets.h
101 @echo " Compiling (16bit) $@"
102 $(Q)$(CC) $(CFLAGS16INC) -c -D__ASSEMBLY__ $< -o $@
104 $(OUT)ccode32.o: ; $(call whole-compile, $(CFLAGS), $(addprefix src/, $(SRC32)),$@)
106 $(OUT)rom32.o: $(OUT)ccode32.o $(OUT)rombios32.lds
107 @echo " Linking (no relocs) $@"
108 $(Q)$(LD) -r -T $(OUT)rombios32.lds $< -o $@
110 $(OUT)romlayout16.lds $(OUT)romlayout32.lds: $(OUT)ccode32.o $(OUT)romlayout16.o
111 @echo " Building layout information $@"
112 $(Q)$(OBJDUMP) -thr $(OUT)ccode32.o > $(OUT)ccode32.o.objdump
113 $(Q)$(OBJDUMP) -thr $(OUT)romlayout16.o > $(OUT)romlayout16.o.objdump
114 $(Q)./tools/layoutrom.py $(OUT)romlayout16.o.objdump $(OUT)ccode32.o.objdump $(OUT)romlayout16.lds $(OUT)romlayout32.lds
116 $(OUT)layout16.lds: $(OUT)romlayout16.lds
117 $(OUT)rombios32.lds: $(OUT)romlayout32.lds
119 $(OUT)rom16.o: $(OUT)romlayout16.o $(OUT)rom32.o $(OUT)layout16.lds
120 @echo " Linking (no relocs) $@"
121 $(Q)$(LD) -r -T $(OUT)layout16.lds $< -o $@
123 $(OUT)rom.o: $(OUT)rom16.o $(OUT)rom32.o $(OUT)rombios16.lds $(OUT)rombios.lds
125 $(Q)$(LD) -T $(OUT)rombios16.lds $(OUT)rom16.o -R $(OUT)rom32.o -o $(OUT)rom16.reloc.o
126 $(Q)$(STRIP) $(OUT)rom16.reloc.o -o $(OUT)rom16.final.o
127 $(Q)$(OBJCOPY) --extract-symbol --adjust-vma 0xf0000 $(OUT)rom16.o $(OUT)rom16.moved.o
128 $(Q)$(LD) -T $(OUT)rombios.lds $(OUT)rom16.final.o $(OUT)rom32.o -R $(OUT)rom16.moved.o -o $@
130 $(OUT)bios.bin.elf: $(OUT)rom.o
132 $(Q)$(NM) $< | ./tools/checkrom.py
133 $(Q)$(STRIP) $< -o $@
135 $(OUT)bios.bin: $(OUT)bios.bin.elf
136 @echo " Extracting binary $@"
137 $(Q)$(OBJCOPY) -O binary $< $@
140 ################ VGA build rules
143 SRCVGA=src/output.c src/util.c vgasrc/vga.c vgasrc/vgafb.c vgasrc/vgaio.c \
144 vgasrc/vgatables.c vgasrc/vgafonts.c vgasrc/clext.c
146 $(OUT)vgaccode.16.s: ; $(call whole-compile, $(CFLAGS16) -S -Isrc, $(SRCVGA),$@)
148 $(OUT)vgalayout16.o: vgaentry.S $(OUT)vgaccode.16.s $(OUT)asm-offsets.h
149 @echo " Compiling (16bit) $@"
150 $(Q)$(CC) $(CFLAGS16INC) -c -D__ASSEMBLY__ -Isrc $< -o $@
152 $(OUT)vgarom.o: $(OUT)vgalayout16.o $(OUT)vgalayout.lds
154 $(Q)$(LD) --gc-sections -T $(OUT)vgalayout.lds $(OUT)vgalayout16.o -o $@
156 $(OUT)vgabios.bin.raw: $(OUT)vgarom.o
157 @echo " Extracting binary $@"
158 $(Q)$(OBJCOPY) -O binary $< $@
160 $(OUT)vgabios.bin: $(OUT)vgabios.bin.raw
161 @echo " Finalizing rom $@"
162 $(Q)./tools/buildrom.py $< $@
164 ####### Generic rules