1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
# SeaBIOS build system
#
# Copyright (C) 2008,2009 Kevin O'Connor <kevin@koconnor.net>
#
# This file may be distributed under the terms of the GNU LGPLv3 license.
# Program version
VERSION=pre-0.5.1-$(shell date +"%Y%m%d_%H%M%S")-$(shell hostname)
# Output directory
OUT=out/
# Source files
SRCBOTH=misc.c pmm.c stacks.c output.c util.c block.c floppy.c ata.c mouse.c \
kbd.c pci.c serial.c clock.c pic.c cdrom.c ps2port.c smp.c resume.c \
pnpbios.c pirtable.c vgahooks.c ramdisk.c pcibios.c \
usb.c usb-uhci.c usb-ohci.c usb-hid.c paravirt.c
SRC16=$(SRCBOTH) system.c disk.c apm.c font.c
SRC32FLAT=$(SRCBOTH) post.c shadow.c memmap.c coreboot.c boot.c \
acpi.c smm.c mptable.c smbios.c pciinit.c optionroms.c mtrr.c \
lzmadecode.c
SRC32SEG=util.c output.c pci.c pcibios.c apm.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 -freg-struct-return \
-ffreestanding -fomit-frame-pointer \
-fno-delete-null-pointer-checks -Wno-strict-aliasing \
-ffunction-sections -fdata-sections -fno-common \
-minline-all-stringops
COMMONCFLAGS += $(call cc-option,$(CC),-nopie,)
COMMONCFLAGS += $(call cc-option,$(CC),-fno-stack-protector,)
COMMONCFLAGS += $(call cc-option,$(CC),-fno-stack-protector-all,)
CFLAGS32FLAT = $(COMMONCFLAGS) -g -DMODE16=0 -DMODESEGMENT=0
CFLAGSSEG = $(COMMONCFLAGS) -DMODESEGMENT=1 -fno-defer-pop \
$(call cc-option,$(CC),-fno-jump-tables,-DMANUAL_NO_JUMP_TABLE) \
$(call cc-option,$(CC),-fno-tree-switch-conversion,)
CFLAGS32SEG = $(CFLAGSSEG) -DMODE16=0 -g
CFLAGS16INC = $(CFLAGSSEG) -DMODE16=1 \
$(call cc-option,$(CC),--param large-stack-frame=4,)
CFLAGS16 = $(CFLAGS16INC) -g
all: $(OUT) $(OUT)bios.bin
# Run with "make V=1" to see the actual compile commands
ifdef V
Q=
else
Q=@
endif
OBJCOPY=objcopy
OBJDUMP=objdump
STRIP=strip
.PHONY : all FORCE
vpath %.c src vgasrc
vpath %.S src vgasrc
################ Build rules
# Verify the gcc configuration and test if -fwhole-program works.
TESTGCC:=$(shell CC=$(CC) tools/test-gcc.sh)
ifeq "$(TESTGCC)" "-1"
$(error "Please upgrade GCC")
endif
ifndef COMPSTRAT
COMPSTRAT=$(TESTGCC)
endif
# Do a whole file compile - three methods are supported.
ifeq "$(COMPSTRAT)" "1"
# First method - use -fwhole-program without -combine.
define whole-compile
@echo " Compiling whole program $3"
$(Q)printf '$(foreach i,$2,#include "../$i"\n)' > $3.tmp.c
$(Q)$(CC) $1 -fwhole-program -DWHOLE_PROGRAM -c $3.tmp.c -o $3
endef
else
ifeq "$(COMPSTRAT)" "2"
# Second menthod - don't use -fwhole-program at all.
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
# Third (and preferred) method - use -fwhole-program with -combine
define whole-compile
@echo " Compiling whole program $3"
$(Q)$(CC) $1 -fwhole-program -DWHOLE_PROGRAM -combine -c $2 -o $3
endef
endif
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)code32seg.o: ; $(call whole-compile, $(CFLAGS32SEG), $(addprefix src/, $(SRC32SEG)),$@)
$(OUT)ccode32flat.o: ; $(call whole-compile, $(CFLAGS32FLAT), $(addprefix src/, $(SRC32FLAT)),$@)
$(OUT)code16.o: romlayout.S $(OUT)ccode.16.s $(OUT)asm-offsets.h
@echo " Compiling (16bit) $@"
$(Q)$(CC) $(CFLAGS16INC) -c -D__ASSEMBLY__ $< -o $@
$(OUT)romlayout16.lds $(OUT)romlayout32seg.lds $(OUT)romlayout32flat.lds $(OUT)code32flat.o: $(OUT)ccode32flat.o $(OUT)code32seg.o $(OUT)code16.o tools/layoutrom.py
@echo " Building ld scripts (version \"$(VERSION)\")"
$(Q)echo 'const char VERSION[] = "$(VERSION)";' > $(OUT)version.c
$(Q)$(CC) $(CFLAGS32FLAT) -c $(OUT)version.c -o $(OUT)version.o
$(Q)$(LD) -melf_i386 -r $(OUT)ccode32flat.o $(OUT)version.o -o $(OUT)code32flat.o
$(Q)$(OBJDUMP) -thr $(OUT)code32flat.o > $(OUT)code32flat.o.objdump
$(Q)$(OBJDUMP) -thr $(OUT)code32seg.o > $(OUT)code32seg.o.objdump
$(Q)$(OBJDUMP) -thr $(OUT)code16.o > $(OUT)code16.o.objdump
$(Q)./tools/layoutrom.py $(OUT)code16.o.objdump $(OUT)code32seg.o.objdump $(OUT)code32flat.o.objdump $(OUT)romlayout16.lds $(OUT)romlayout32seg.lds $(OUT)romlayout32flat.lds
$(OUT)rom16.o: $(OUT)code16.o $(OUT)rom32flat.o $(OUT)romlayout16.lds
@echo " Linking (no relocs) $@"
$(Q)$(LD) -r -T $(OUT)romlayout16.lds $< -o $@
$(OUT)rom32seg.o: $(OUT)code32seg.o $(OUT)romlayout32seg.lds
@echo " Linking (no relocs) $@"
$(Q)$(LD) -r -T $(OUT)romlayout32seg.lds $< -o $@
$(OUT)rom32flat.o: $(OUT)code32flat.o $(OUT)romlayout32flat.lds
@echo " Linking (no relocs) $@"
$(Q)$(LD) -r -T $(OUT)romlayout32flat.lds $< -o $@
$(OUT)rom.o: $(OUT)rom16.o $(OUT)rom32seg.o $(OUT)rom32flat.o $(OUT)rombios16.lds $(OUT)rombios32seg.lds $(OUT)rombios.lds
@echo " Linking $@"
$(Q)$(LD) -T $(OUT)rombios16.lds $(OUT)rom16.o -R $(OUT)rom32seg.o -R $(OUT)rom32flat.o -o $(OUT)rom16.reloc.o
$(Q)$(STRIP) $(OUT)rom16.reloc.o -o $(OUT)rom16.final.o
$(Q)$(OBJCOPY) --adjust-vma 0xf0000 $(OUT)rom16.o $(OUT)rom16.moved.o
$(Q)$(LD) -T $(OUT)rombios32seg.lds $(OUT)rom32seg.o -R $(OUT)rom16.o -R $(OUT)rom32flat.o -o $(OUT)rom32seg.reloc.o
$(Q)$(STRIP) $(OUT)rom32seg.reloc.o -o $(OUT)rom32seg.final.o
$(Q)$(OBJCOPY) --adjust-vma 0xf0000 $(OUT)rom32seg.o $(OUT)rom32seg.moved.o
$(Q)$(LD) -T $(OUT)rombios.lds $(OUT)rom16.final.o $(OUT)rom32seg.final.o $(OUT)rom32flat.o -R $(OUT)rom16.moved.o -R $(OUT)rom32seg.moved.o -o $@
$(OUT)bios.bin.elf $(OUT)bios.bin: $(OUT)rom.o tools/checkrom.py
@echo " Prepping $@"
$(Q)$(OBJDUMP) -thr $< > $<.objdump
$(Q)$(OBJCOPY) -O binary $< $(OUT)bios.bin.raw
$(Q)./tools/checkrom.py $<.objdump $(OUT)bios.bin.raw $(OUT)bios.bin
$(Q)$(STRIP) -R .comment $< -o $(OUT)bios.bin.elf
################ VGA build rules
# VGA src files
SRCVGA=src/output.c src/util.c vgasrc/vga.c vgasrc/vgafb.c vgasrc/vgaio.c \
vgasrc/vgatables.c vgasrc/vgafonts.c vgasrc/clext.c
$(OUT)vgaccode.16.s: ; $(call whole-compile, $(CFLAGS16) -S -Isrc, $(SRCVGA),$@)
$(OUT)vgalayout16.o: vgaentry.S $(OUT)vgaccode.16.s $(OUT)asm-offsets.h
@echo " Compiling (16bit) $@"
$(Q)$(CC) $(CFLAGS16INC) -c -D__ASSEMBLY__ -Isrc $< -o $@
$(OUT)vgarom.o: $(OUT)vgalayout16.o $(OUT)vgalayout.lds
@echo " Linking $@"
$(Q)$(LD) --gc-sections -T $(OUT)vgalayout.lds $(OUT)vgalayout16.o -o $@
$(OUT)vgabios.bin.raw: $(OUT)vgarom.o
@echo " Extracting binary $@"
$(Q)$(OBJCOPY) -O binary $< $@
$(OUT)vgabios.bin: $(OUT)vgabios.bin.raw tools/buildrom.py
@echo " Finalizing rom $@"
$(Q)./tools/buildrom.py $< $@
####### dsdt build rules
src/acpi-dsdt.hex: src/acpi-dsdt.dsl
@echo "Compiling DSDT"
$(Q)cpp -P $< > $(OUT)acpi-dsdt.dsl.i
$(Q)iasl -tc -p $@ $(OUT)acpi-dsdt.dsl.i
$(Q)rm $(OUT)acpi-dsdt.dsl.i
####### Generic rules
clean:
$(Q)rm -rf $(OUT)
$(OUT):
$(Q)mkdir $@
-include $(OUT)*.d
|