blob: 3d70d6b6f1d8befcd711c11ad46ec4ebb7d946dc (
plain) (
blame)
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
|
DO != echo -n > deps.mk
# this could be done better
DEBUGFLAGS != [ $(RELEASE) ] \
&& echo "-flto -O2 -DNDEBUG" \
|| echo "-O0 -DDEBUG"
CFLAGS = -ffreestanding -nostdlib -fno-pie -std=c17 -Wall -Wextra -Wvla -D$(ARCH) -g
DEPFLAGS = -MT $@ -MMD -MP -MF $@.d
LINTFLAGS = -fsyntax-only
PREPROCESS = -E
LDFLAGS != [ $(LLVM) ] \
|| echo -static-libgcc -lgcc
BUILD = build
ARCH_KERN_BUILD = $(BUILD)/kernel/arch/$(ARCH)
ARCH_INIT_BUILD = $(BUILD)/init/arch/$(ARCH)
ARCH_SOURCE = arch/$(ARCH)
all: kmi.bin
# bmake requires us to run make depend to genereate deps.mk beforehand,
# so create an empty rule that lets the rest of the script do its job
depend:
# default values, overwrite if/when needed
ARCH ?= riscv64
CROSS_COMPILE ?= $(ARCH)-unknown-elf-
OBJCOPY != [ $(LLVM) ] \
&& echo llvm-objcopy \
|| echo $(CROSS_COMPILE)objcopy
COMPILER != [ $(LLVM) ] \
&& echo clang --target="$(CROSS_COMPILE)" \
|| echo $(CROSS_COMPILE)gcc
KERNEL_SOURCES != echo common/*.c common/uapi/*.c lib/*.c
# might consider renaming common, currently it refers to stuff common
# to all arches but clearly there are bits that are common to init and kernel
INIT_SOURCES != echo lib/fdt*.c common/fdt.c common/string.c
CLEANUP := build deps.mk kernel.* init.* kmi.bin
CLEANUP_CMD :=
include arch/$(ARCH)/source.mk
COMPILE_FLAGS := $(CFLAGS) $(ARCH_CFLAGS)
LINK_FLAGS := $(LDFLAGS) $(ARCH_LDFLAGS)
INCLUDE_FLAGS := -I include -include config.h -include arch/$(ARCH)/config.h
# This makes sure .bss is loaded into the binary
OBJCOPY_FLAGS ?= -Obinary -R .garbage \
--set-section-flags .bss=alloc,load,contents
COMPILE = $(COMPILER) $(DEBUGFLAGS)\
$(COMPILE_FLAGS) $(DEPFLAGS) $(INCLUDE_FLAGS)
LINT = $(COMPILER) $(DEBUGFLAGS)\
$(COMPILE_FLAGS) $(LINTFLAGS) $(INCLUDE_FLAGS)
GENELF = $(COMPILER) $(DEBUGFLAGS)\
$(COMPILE_FLAGS) $(INCLUDE_FLAGS)
GENLINK = $(COMPILER) $(COMPILE_FLAGS) $(PREPROCESS) $(DEPFLAGS) $(INCLUDE_FLAGS)
STRIPLINK = sed -n '/^[^\#]/p'
KERN_SIZE = wc -c kernel.bin | awk '{print $$1}'
KERN_INFO = sed "s/<KERNEL_SIZE>/$$($(KERN_SIZE))/"
KERNEL_LINK := arch/$(ARCH)/conf/kernel-link
INIT_LINK := arch/$(ARCH)/conf/init-link
KERN_FLAGS != [ $(UBSAN) ] && echo -fsanitize=undefined || echo
INIT_FLAGS := -fpic
KERNEL_OBJECTS != ./scripts/gen-deps --kernel --compile "$(KERNEL_SOURCES)"
INIT_OBJECTS != ./scripts/gen-deps --init --compile "$(INIT_SOURCES)"
KERNEL_LD != ./scripts/gen-deps --kernel --link "$(KERNEL_LINK).S"
INIT_LD != ./scripts/gen-deps --init --link "$(INIT_LINK).S"
-include deps.mk
$(INIT_LD): kernel.bin
init.elf: $(INIT_OBJECTS) $(INIT_LD)
$(GENELF) $(INIT_FLAGS) -T $(INIT_LD) $(INIT_OBJECTS) -o init.elf $(LINK_FLAGS)
kernel.elf: $(KERNEL_OBJECTS) $(KERNEL_LD)
$(GENELF) $(KERNEL_FLAGS) -T $(KERNEL_LD) $(KERNEL_OBJECTS) -o kernel.elf $(LINK_FLAGS)
init.bin: init.elf
$(OBJCOPY) $(OBJCOPY_FLAGS) init.elf init.bin
kernel.bin: kernel.elf
$(OBJCOPY) $(OBJCOPY_FLAGS) kernel.elf kernel.bin
kmi.bin: init.bin kernel.bin
cat init.bin kernel.bin > kmi.bin
.PHONY:
lint: $(INIT_OBJECTS:.o=.o.l) $(KERNEL_OBJECTS:.o=.o.l)
.PHONY: format
format:
find arch lib common include -iname '*.[ch]' |\
xargs -n 10 -P 0 uncrustify -c uncrustify.conf --no-backup -F -
.PHONY: license
license:
find arch lib common include -iname '*.[ch]' |\
xargs -n 10 -P 0 ./scripts/license
.PHONY: docs
docs:
find arch lib common include -iname '*.[ch]' -not -path */gen/* |\
xargs ./scripts/warn-undocumented
doxygen docs/doxygen.conf
# bmake didn't seem to have the -f flag on by default
RM ?= rm -f
.PHONY: clean
clean:
$(RM) -r $(CLEANUP)
.PHONY: clean_run
clean_run:
$(CLEANUP_CMD)
.PHONY: clean_docs
clean_docs:
$(RM) -r docs/output
.PHONY: clean_all
clean_all: clean clean_run clean_docs
|
