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
|
#!/usr/bin/env python3
from glob import glob
file = open('Makefile', 'w', encoding='utf-8')
def raw(s):
print(s, file=file)
def srcobj(path):
srcs = glob(path + '/**/*.[csS]', recursive=True)
objs = ['out/obj/' + src.removeprefix('src/') + '.o' for src in srcs]
return ' ' + ' '.join(objs) + ' '
def t(out, deps='', cmds=[], phony=False, verbose=False):
if phony:
raw(f".PHONY: {out}")
else:
cmds = ["mkdir -p $(@D)"] + cmds
raw(f"{out}: {deps}")
v = '' if verbose else '$(V)'
for cmd in cmds:
raw(f"\t{v}{cmd}")
raw("""
# automatically generated by ./configure
PATH := $(shell pwd)/toolchain/prefix/bin/:$(PATH)
AR = x86_64-camellia-ar
AS = x86_64-camellia-as
CC = x86_64-camellia-gcc
V=@
CFLAGS = -g -std=gnu99 -O2 -fPIC -ftrack-macro-expansion=0 \
-Wall -Wextra -Wold-style-definition -Wno-address-of-packed-member \
-Werror=incompatible-pointer-types -Werror=implicit-function-declaration
CFLAGS_KERNEL = $(CFLAGS) \
-ffreestanding -mno-sse -mgeneral-regs-only \
--sysroot=out/sysrootk/ -Isrc/
CFLAGS_LIBC = $(CFLAGS) -ffreestanding -Isrc/
SPARSEFLAGS = $(CFLAGS_KERNEL) -Wno-non-pointer-null -Iout/sysrootk/usr/include/ -D__SPARSE
LIB = out/sysrootu/lib/libc.a out/sysrootu/lib/libm.a out/sysrootu/lib/crt0.o
""")
t('all', 'out/boot.iso out/fs.e2 check', phony=True)
t('portdeps', 'out/sysrootu/usr/include/ $(LIB)', phony=True)
# TODO check userland sources too
t('check', '', [
'find src/kernel/ -type f -name *.c | xargs -n 1 sparse $(SPARSEFLAGS)'
], phony=True)
t('clean', '', [
'rm -rf out/'
], phony=True, verbose=True)
raw("""
PORTS=
.PHONY: ports
# portdeps is phony, so ports/% is automatically "phony" too
ports: $(patsubst %,ports/%,$(PORTS))
ports/%: portdeps
+$@/port install
""")
t('out/boot.iso', 'out/fs/boot/kernel out/fs/boot/grub/grub.cfg out/fs/boot/init', [
'grub-mkrescue -o $@ out/fs/ >/dev/null 2>&1'
])
t('out/fs/boot/kernel', 'src/kernel/arch/amd64/linker.ld' + srcobj('src/kernel/') + srcobj('src/libk/'), [
'$(CC) -nostdlib -Wl,-zmax-page-size=4096 -Wl,--no-warn-mismatch -Wl,-no-pie -T $^ -o $@',
'grub-file --is-x86-multiboot2 $@ || echo "$@ has an invalid multiboot2 header"',
'grub-file --is-x86-multiboot2 $@ || rm $@; test -e $@'
])
t('out/sysrootu/lib/libc.a', srcobj('src/libc/') + srcobj('src/libk/'), [
'$(AR) rcs $@ $^'
])
t('out/sysrootu/lib/libm.a', '', [
'$(AR) rcs $@ $^'
])
t('out/bootstrap', 'out/bootstrap.elf', ['objcopy -O binary $^ $@'])
t('out/bootstrap.elf', 'src/bootstrap/linker.ld' + srcobj('src/bootstrap/') + 'out/sysrootu/lib/libc.a', [
'$(CC) -nostdlib -Wl,-no-pie -T $^ -o $@'
])
t('out/fs/boot/init', 'out/bootstrap out/initrd.tar', ['cat $^ > $@'])
t('out/fs/boot/grub/grub.cfg', 'src/kernel/arch/amd64/grub.cfg', ['cp $< $@'])
t('out/fs.e2', '', ['mkfs.ext2 $@ 1024 >/dev/null'])
userbins = glob('*', root_dir='src/cmd/')
raw("USERBINS = " + " ".join(userbins))
for cmd in userbins:
t(f'out/initrd/bin/amd64/{cmd}', '$(LIB) ' + srcobj(f'src/cmd/{cmd}'), [
'$(CC) $^ -o $@'
])
# don't build the example implementation from libext2
t('out/obj/cmd/ext2fs/ext2/example.c.o', '', ['touch $@'])
t('out/initrd/%', 'sysroot/%', ['cp $< $@'])
t('out/initrd.tar',
'$(patsubst sysroot/%,out/initrd/%,$(shell find sysroot/ -type f)) '
'$(patsubst %,out/initrd/bin/amd64/%,$(USERBINS)) '
'$(shell find out/initrd/) '
'ports ',
['cd out/initrd; tar chf ../initrd.tar *'])
t('src/libc/include/__errno.h',
'src/libc/include/__errno.h.awk src/libk/include/camellia/errno.h',
['awk -f $^ > $@'])
t('src/libc/syscall.c',
'src/libc/syscall.c.awk src/libk/include/camellia/syscalls.h',
['awk -f $^ > $@'])
def includes(target, modules, deps='', cmds=[]):
dirs = " ".join([f"src/{mod}/include/" for mod in modules])
t(target, deps, [
"set -eu;"
f"for file in $$(find {dirs} -type f,l -name '*.h'); do "
" out=$@$${file#src/*/include/};"
" mkdir -p $$(dirname $$out);"
" ln -rfs $$file $$out;"
"done"
] + cmds, phony=True)
includes("out/sysrootk/usr/include/", ["libk"])
# this must work without a toolchain available, as it's required to build
# the toolchain
includes("out/sysrootu/usr/include/", ["libc", "libk"], 'src/libc/include/__errno.h', [
'ln -rfs src/libc/include/__errno.h $@',
])
t('out/sysrootu/lib/crt0.o', 'out/obj/libc/_start.s.o', ['cp $^ $@'])
def cc(rule, args, deps):
# The | marks an order-only dependency. This means that sysroot will be
# built every time the rule is ran, but without forcing a rebuild if the
# rule is fresh.
# https://www.gnu.org/software/make/manual/make.html#index-order_002donly-prerequisites
t(f'out/obj/{rule}.o', f'src/{rule} | {deps}', [
f'$(CC) {args} -c $< -o $@'
])
cc("%.c", "$(CFLAGS)", "out/sysrootu/usr/include/")
cc("%.s", "$(CFLAGS)", "out/sysrootu/usr/include/")
cc("%.S", "$(CFLAGS)", "out/sysrootu/usr/include/")
cc("bootstrap/%.c", "$(CFLAGS) -fno-pie", "out/sysrootu/usr/include/")
cc("libc/%.c", "$(CFLAGS_LIBC)", "out/sysrootu/usr/include/")
cc("libc/vendor/dlmalloc/%.c", "$(CFLAGS_LIBC) -DMAP_ANONYMOUS -DHAVE_MORECORE=0 -DNO_MALLOC_H -Wno-expansion-to-defined -Wno-old-style-definition", "out/sysrootu/usr/include/")
cc("kernel/%.c", "$(CFLAGS_KERNEL)", "out/sysrootk/usr/include/")
cc("kernel/%.s", "$(CFLAGS_KERNEL)", "out/sysrootk/usr/include/")
cc("kernel/%.S", "$(CFLAGS_KERNEL)", "out/sysrootk/usr/include/")
cc("libk/%.c", "$(CFLAGS_KERNEL)", "out/sysrootk/usr/include/")
cc("libk/%.s", "$(CFLAGS_KERNEL)", "out/sysrootk/usr/include/")
cc("libk/%.S", "$(CFLAGS_KERNEL)", "out/sysrootk/usr/include/")
cc("kernel/arch/amd64/32/%.c", "$(CFLAGS_KERNEL) -fno-pic -m32", "out/sysrootk/usr/include/")
cc("kernel/arch/amd64/32/%.s", "$(CFLAGS_KERNEL) -fno-pic -m32", "out/sysrootk/usr/include/")
|
