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 -fomit-frame-pointer \
26 -fno-delete-null-pointer-checks -Wno-strict-aliasing \
27 -ffunction-sections -fdata-sections -fno-common \
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-defer-pop \
35 $(call cc-option,$(CC),-fno-jump-tables,-DMANUAL_NO_JUMP_TABLE) \
36 $(call cc-option,$(CC),-fno-tree-switch-conversion,) \
37 $(call cc-option,$(CC),--param large-stack-frame=4,)
38 CFLAGS16 = $(CFLAGS16INC) -g
40 all: $(OUT) $(OUT)bios.bin
42 # Run with "make V=1" to see the actual compile commands
59 ################ Build rules
61 # Verify the gcc configuration and test if -fwhole-program works.
62 TESTGCC:=$(shell CC=$(CC) tools/test-gcc.sh)
63 ifeq "$(TESTGCC)" "-1"
64 $(error "Please upgrade GCC")
71 # Do a whole file compile - three methods are supported.
72 ifeq "$(COMPSTRAT)" "1"
73 # First method - use -fwhole-program without -combine.
75 @echo " Compiling whole program $3"
76 $(Q)printf '$(foreach i,$2,#include "../$i"\n)' > $3.tmp.c
77 $(Q)$(CC) $1 -fwhole-program -DWHOLE_PROGRAM -c $3.tmp.c -o $3
80 ifeq "$(COMPSTRAT)" "2"
81 # Second menthod - don't use -fwhole-program at all.
83 @echo " Compiling whole program $3"
84 $(Q)printf '$(foreach i,$2,#include "../$i"\n)' > $3.tmp.c
85 $(Q)$(CC) $1 -c $3.tmp.c -o $3
88 # Third (and preferred) method - use -fwhole-program with -combine
90 @echo " Compiling whole program $3"
91 $(Q)$(CC) $1 -fwhole-program -DWHOLE_PROGRAM -combine -c $2 -o $3
98 @echo " Compiling to assembler $@"
99 $(Q)$(CC) $(CFLAGS16INC) -S -c $< -o $@
102 @echo " Precompiling $@"
103 $(Q)$(CPP) -P -D__ASSEMBLY__ $< -o $@
105 $(OUT)asm-offsets.h: $(OUT)asm-offsets.s
106 @echo " Generating offset file $@"
107 $(Q)./tools/gen-offsets.sh $< $@
109 $(OUT)ccode.16.s: ; $(call whole-compile, $(CFLAGS16) -S, $(addprefix src/, $(SRC16)),$@)
111 $(OUT)romlayout16.o: romlayout.S $(OUT)ccode.16.s $(OUT)asm-offsets.h
112 @echo " Compiling (16bit) $@"
113 $(Q)$(CC) $(CFLAGS16INC) -c -D__ASSEMBLY__ $< -o $@
115 $(OUT)ccode32.o: ; $(call whole-compile, $(CFLAGS), $(addprefix src/, $(SRC32)),$@)
117 $(OUT)rom32.o: $(OUT)ccode32.o $(OUT)rombios32.lds
118 @echo " Linking (no relocs) $@"
119 $(Q)$(LD) -r -T $(OUT)rombios32.lds $< -o $@
121 $(OUT)romlayout16.lds $(OUT)romlayout32.lds: $(OUT)ccode32.o $(OUT)romlayout16.o
122 @echo " Building layout information $@"
123 $(Q)$(OBJDUMP) -thr $(OUT)ccode32.o > $(OUT)ccode32.o.objdump
124 $(Q)$(OBJDUMP) -thr $(OUT)romlayout16.o > $(OUT)romlayout16.o.objdump
125 $(Q)./tools/layoutrom.py $(OUT)romlayout16.o.objdump $(OUT)ccode32.o.objdump $(OUT)romlayout16.lds $(OUT)romlayout32.lds
127 $(OUT)layout16.lds: $(OUT)romlayout16.lds
128 $(OUT)rombios32.lds: $(OUT)romlayout32.lds
130 $(OUT)rom16.o: $(OUT)romlayout16.o $(OUT)rom32.o $(OUT)layout16.lds
131 @echo " Linking (no relocs) $@"
132 $(Q)$(LD) -r -T $(OUT)layout16.lds $< -o $@
134 $(OUT)rom.o: $(OUT)rom16.o $(OUT)rom32.o $(OUT)rombios16.lds $(OUT)rombios.lds
136 $(Q)$(LD) -T $(OUT)rombios16.lds $(OUT)rom16.o -R $(OUT)rom32.o -o $(OUT)rom16.reloc.o
137 $(Q)$(STRIP) $(OUT)rom16.reloc.o -o $(OUT)rom16.final.o
138 $(Q)$(OBJCOPY) --extract-symbol --adjust-vma 0xf0000 $(OUT)rom16.o $(OUT)rom16.moved.o
139 $(Q)$(LD) -T $(OUT)rombios.lds $(OUT)rom16.final.o $(OUT)rom32.o -R $(OUT)rom16.moved.o -o $@
141 $(OUT)bios.bin.elf: $(OUT)rom.o
143 $(Q)$(NM) $< | ./tools/checkrom.py
144 $(Q)$(STRIP) $< -o $@
146 $(OUT)bios.bin: $(OUT)bios.bin.elf
147 @echo " Extracting binary $@"
148 $(Q)$(OBJCOPY) -O binary $< $@
151 ################ VGA build rules
154 SRCVGA=src/output.c src/util.c vgasrc/vga.c vgasrc/vgafb.c vgasrc/vgaio.c \
155 vgasrc/vgatables.c vgasrc/vgafonts.c vgasrc/clext.c
157 $(OUT)vgaccode.16.s: ; $(call whole-compile, $(CFLAGS16) -S -Isrc, $(SRCVGA),$@)
159 $(OUT)vgalayout16.o: vgaentry.S $(OUT)vgaccode.16.s $(OUT)asm-offsets.h
160 @echo " Compiling (16bit) $@"
161 $(Q)$(CC) $(CFLAGS16INC) -c -D__ASSEMBLY__ -Isrc $< -o $@
163 $(OUT)vgarom.o: $(OUT)vgalayout16.o $(OUT)vgalayout.lds
165 $(Q)$(LD) --gc-sections -T $(OUT)vgalayout.lds $(OUT)vgalayout16.o -o $@
167 $(OUT)vgabios.bin.raw: $(OUT)vgarom.o
168 @echo " Extracting binary $@"
169 $(Q)$(OBJCOPY) -O binary $< $@
171 $(OUT)vgabios.bin: $(OUT)vgabios.bin.raw
172 @echo " Finalizing rom $@"
173 $(Q)./tools/buildrom.py $< $@
175 ####### Generic rules