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.
8 VERSION=pre-0.4.3-$(shell date +"%Y%m%d_%H%M%S")-$(shell hostname)
14 SRCBOTH=output.c util.c block.c floppy.c ata.c misc.c mouse.c kbd.c pci.c \
15 serial.c clock.c pic.c cdrom.c ps2port.c smp.c resume.c \
16 pnpbios.c pirtable.c vgahooks.c pmm.c ramdisk.c
17 SRC16=$(SRCBOTH) system.c disk.c apm.c pcibios.c font.c
18 SRC32=$(SRCBOTH) post.c shadow.c memmap.c coreboot.c boot.c \
19 acpi.c smm.c mptable.c smbios.c pciinit.c optionroms.c mtrr.c \
22 cc-option = $(shell if test -z "`$(1) $(2) -S -o /dev/null -xc \
23 /dev/null 2>&1`"; then echo "$(2)"; else echo "$(3)"; fi ;)
25 # Default compiler flags
26 COMMONCFLAGS = -Wall -Os -MD -m32 -march=i386 -mregparm=3 \
27 -mpreferred-stack-boundary=2 -mrtd -freg-struct-return \
28 -ffreestanding -fomit-frame-pointer \
29 -fno-delete-null-pointer-checks -Wno-strict-aliasing \
30 -ffunction-sections -fdata-sections -fno-common \
31 -minline-all-stringops
32 COMMONCFLAGS += $(call cc-option,$(CC),-nopie,)
33 COMMONCFLAGS += $(call cc-option,$(CC),-fno-stack-protector,)
34 COMMONCFLAGS += $(call cc-option,$(CC),-fno-stack-protector-all,)
36 override CFLAGS = $(COMMONCFLAGS) -g -DMODE16=0
37 CFLAGS16INC = $(COMMONCFLAGS) -DMODE16=1 -fno-defer-pop \
38 $(call cc-option,$(CC),-fno-jump-tables,-DMANUAL_NO_JUMP_TABLE) \
39 $(call cc-option,$(CC),-fno-tree-switch-conversion,) \
40 $(call cc-option,$(CC),--param large-stack-frame=4,)
41 CFLAGS16 = $(CFLAGS16INC) -g
43 all: $(OUT) $(OUT)bios.bin
45 # Run with "make V=1" to see the actual compile commands
62 ################ Build rules
64 # Verify the gcc configuration and test if -fwhole-program works.
65 TESTGCC:=$(shell CC=$(CC) tools/test-gcc.sh)
66 ifeq "$(TESTGCC)" "-1"
67 $(error "Please upgrade GCC")
74 # Do a whole file compile - three methods are supported.
75 ifeq "$(COMPSTRAT)" "1"
76 # First method - use -fwhole-program without -combine.
78 @echo " Compiling whole program $3"
79 $(Q)printf '$(foreach i,$2,#include "../$i"\n)' > $3.tmp.c
80 $(Q)$(CC) $1 -fwhole-program -DWHOLE_PROGRAM -c $3.tmp.c -o $3
83 ifeq "$(COMPSTRAT)" "2"
84 # Second menthod - don't use -fwhole-program at all.
86 @echo " Compiling whole program $3"
87 $(Q)printf '$(foreach i,$2,#include "../$i"\n)' > $3.tmp.c
88 $(Q)$(CC) $1 -c $3.tmp.c -o $3
91 # Third (and preferred) method - use -fwhole-program with -combine
93 @echo " Compiling whole program $3"
94 $(Q)$(CC) $1 -fwhole-program -DWHOLE_PROGRAM -combine -c $2 -o $3
101 @echo " Compiling to assembler $@"
102 $(Q)$(CC) $(CFLAGS16INC) -S -c $< -o $@
105 @echo " Precompiling $@"
106 $(Q)$(CPP) -P -D__ASSEMBLY__ $< -o $@
108 $(OUT)asm-offsets.h: $(OUT)asm-offsets.s
109 @echo " Generating offset file $@"
110 $(Q)./tools/gen-offsets.sh $< $@
113 $(OUT)ccode.16.s: ; $(call whole-compile, $(CFLAGS16) -S, $(addprefix src/, $(SRC16)),$@)
115 $(OUT)code16.o: romlayout.S $(OUT)ccode.16.s $(OUT)asm-offsets.h
116 @echo " Compiling (16bit) $@"
117 $(Q)$(CC) $(CFLAGS16INC) -c -D__ASSEMBLY__ $< -o $@
119 $(OUT)code32.o: ; $(call whole-compile, $(CFLAGS), $(addprefix src/, $(SRC32)),$@)
121 $(OUT)romlayout16.lds $(OUT)romlayout32.lds: $(OUT)code32.o $(OUT)code16.o
122 @echo " Building layout information $@"
123 $(Q)$(OBJDUMP) -thr $(OUT)code32.o > $(OUT)code32.o.objdump
124 $(Q)$(OBJDUMP) -thr $(OUT)code16.o > $(OUT)code16.o.objdump
125 $(Q)./tools/layoutrom.py $(OUT)code16.o.objdump $(OUT)code32.o.objdump $(OUT)romlayout16.lds $(OUT)romlayout32.lds
127 $(OUT)layout16.lds: $(OUT)romlayout16.lds
128 $(OUT)rombios32.lds: $(OUT)romlayout32.lds
131 $(OUT)rom16.o: $(OUT)code16.o $(OUT)rom32.o $(OUT)layout16.lds
132 @echo " Linking (no relocs) $@"
133 $(Q)$(LD) -r -T $(OUT)layout16.lds $< -o $@
135 $(OUT)rom32.o: $(OUT)code32.o $(OUT)rombios32.lds
136 @echo " Linking (no relocs) $@"
137 $(Q)$(LD) -r -T $(OUT)rombios32.lds $< -o $@
139 $(OUT)rom.o: $(OUT)rom16.o $(OUT)rom32.o $(OUT)rombios16.lds $(OUT)rombios.lds
140 @echo " Linking $@ (version \"$(VERSION)\")"
141 $(Q)echo 'const char VERSION[] __attribute__((section(".data32.version"))) = "$(VERSION)";' > $(OUT)version.c
142 $(Q)$(CC) $(CFLAGS) -c $(OUT)version.c -o $(OUT)version.o
143 $(Q)$(LD) -T $(OUT)rombios16.lds $(OUT)rom16.o -R $(OUT)rom32.o -o $(OUT)rom16.reloc.o
144 $(Q)$(STRIP) $(OUT)rom16.reloc.o -o $(OUT)rom16.final.o
145 $(Q)$(OBJCOPY) --adjust-vma 0xf0000 $(OUT)rom16.o $(OUT)rom16.moved.o
146 $(Q)$(LD) -T $(OUT)rombios.lds $(OUT)rom16.final.o $(OUT)rom32.o $(OUT)version.o -R $(OUT)rom16.moved.o -o $@
148 $(OUT)bios.bin.elf: $(OUT)rom.o
150 $(Q)$(NM) $< | ./tools/checkrom.py
151 $(Q)$(STRIP) $< -o $@
153 $(OUT)bios.bin: $(OUT)bios.bin.elf
154 @echo " Extracting binary $@"
155 $(Q)$(OBJCOPY) -O binary $< $@
158 ################ VGA build rules
161 SRCVGA=src/output.c src/util.c vgasrc/vga.c vgasrc/vgafb.c vgasrc/vgaio.c \
162 vgasrc/vgatables.c vgasrc/vgafonts.c vgasrc/clext.c
164 $(OUT)vgaccode.16.s: ; $(call whole-compile, $(CFLAGS16) -S -Isrc, $(SRCVGA),$@)
166 $(OUT)vgalayout16.o: vgaentry.S $(OUT)vgaccode.16.s $(OUT)asm-offsets.h
167 @echo " Compiling (16bit) $@"
168 $(Q)$(CC) $(CFLAGS16INC) -c -D__ASSEMBLY__ -Isrc $< -o $@
170 $(OUT)vgarom.o: $(OUT)vgalayout16.o $(OUT)vgalayout.lds
172 $(Q)$(LD) --gc-sections -T $(OUT)vgalayout.lds $(OUT)vgalayout16.o -o $@
174 $(OUT)vgabios.bin.raw: $(OUT)vgarom.o
175 @echo " Extracting binary $@"
176 $(Q)$(OBJCOPY) -O binary $< $@
178 $(OUT)vgabios.bin: $(OUT)vgabios.bin.raw
179 @echo " Finalizing rom $@"
180 $(Q)./tools/buildrom.py $< $@
182 ####### Generic rules