1 # This mimics the top-level Makefile. We do it 1 # This mimics the top-level Makefile. We do it explicitly here so that this
2 # Makefile can operate with or without the kbu 2 # Makefile can operate with or without the kbuild infrastructure.
3 ifneq ($(LLVM),) 3 ifneq ($(LLVM),)
4 ifneq ($(filter %/,$(LLVM)),) 4 ifneq ($(filter %/,$(LLVM)),)
5 LLVM_PREFIX := $(LLVM) 5 LLVM_PREFIX := $(LLVM)
6 else ifneq ($(filter -%,$(LLVM)),) 6 else ifneq ($(filter -%,$(LLVM)),)
7 LLVM_SUFFIX := $(LLVM) 7 LLVM_SUFFIX := $(LLVM)
8 endif 8 endif
9 9
10 CLANG := $(LLVM_PREFIX)clang$(LLVM_SUFFIX) 10 CLANG := $(LLVM_PREFIX)clang$(LLVM_SUFFIX)
11 11
12 CLANG_TARGET_FLAGS_arm := arm-linux-g 12 CLANG_TARGET_FLAGS_arm := arm-linux-gnueabi
13 CLANG_TARGET_FLAGS_arm64 := aarch64-lin 13 CLANG_TARGET_FLAGS_arm64 := aarch64-linux-gnu
14 CLANG_TARGET_FLAGS_hexagon := hexagon-lin 14 CLANG_TARGET_FLAGS_hexagon := hexagon-linux-musl
15 CLANG_TARGET_FLAGS_i386 := i386-linux- 15 CLANG_TARGET_FLAGS_i386 := i386-linux-gnu
16 CLANG_TARGET_FLAGS_m68k := m68k-linux- 16 CLANG_TARGET_FLAGS_m68k := m68k-linux-gnu
17 CLANG_TARGET_FLAGS_mips := mipsel-linu 17 CLANG_TARGET_FLAGS_mips := mipsel-linux-gnu
18 CLANG_TARGET_FLAGS_powerpc := powerpc64le 18 CLANG_TARGET_FLAGS_powerpc := powerpc64le-linux-gnu
19 CLANG_TARGET_FLAGS_riscv := riscv64-lin 19 CLANG_TARGET_FLAGS_riscv := riscv64-linux-gnu
20 CLANG_TARGET_FLAGS_s390 := s390x-linux 20 CLANG_TARGET_FLAGS_s390 := s390x-linux-gnu
21 CLANG_TARGET_FLAGS_x86 := x86_64-linu 21 CLANG_TARGET_FLAGS_x86 := x86_64-linux-gnu
22 CLANG_TARGET_FLAGS_x86_64 := x86_64-linu 22 CLANG_TARGET_FLAGS_x86_64 := x86_64-linux-gnu
23 23
24 # Default to host architecture if ARCH is not 24 # Default to host architecture if ARCH is not explicitly given.
25 ifeq ($(ARCH),) 25 ifeq ($(ARCH),)
26 CLANG_TARGET_FLAGS := $(shell $(CLANG) -print- 26 CLANG_TARGET_FLAGS := $(shell $(CLANG) -print-target-triple)
27 else 27 else
28 CLANG_TARGET_FLAGS := $(CLANG_TARGET_FLAGS_$(A 28 CLANG_TARGET_FLAGS := $(CLANG_TARGET_FLAGS_$(ARCH))
29 endif 29 endif
30 30
31 ifeq ($(CROSS_COMPILE),) 31 ifeq ($(CROSS_COMPILE),)
32 ifeq ($(CLANG_TARGET_FLAGS),) 32 ifeq ($(CLANG_TARGET_FLAGS),)
33 $(error Specify CROSS_COMPILE or add '--target 33 $(error Specify CROSS_COMPILE or add '--target=' option to lib.mk)
34 else 34 else
35 CLANG_FLAGS += --target=$(CLANG_TARGET_FLA 35 CLANG_FLAGS += --target=$(CLANG_TARGET_FLAGS)
36 endif # CLANG_TARGET_FLAGS 36 endif # CLANG_TARGET_FLAGS
37 else 37 else
38 CLANG_FLAGS += --target=$(notdir $(CROSS_C 38 CLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%))
39 endif # CROSS_COMPILE 39 endif # CROSS_COMPILE
40 40
41 # gcc defaults to silence (off) for the follow 41 # gcc defaults to silence (off) for the following warnings, but clang defaults
42 # to the opposite. The warnings are not useful 42 # to the opposite. The warnings are not useful for the kernel itself, which is
43 # why they have remained disabled in gcc for t 43 # why they have remained disabled in gcc for the main kernel build. And it is
44 # only due to including kernel data structures 44 # only due to including kernel data structures in the selftests, that we get the
45 # warnings from clang. Therefore, disable the 45 # warnings from clang. Therefore, disable the warnings for clang builds.
46 CFLAGS += -Wno-address-of-packed-member 46 CFLAGS += -Wno-address-of-packed-member
47 CFLAGS += -Wno-gnu-variable-sized-type-not-at- 47 CFLAGS += -Wno-gnu-variable-sized-type-not-at-end
48 48
49 CC := $(CLANG) $(CLANG_FLAGS) -fintegrated-as 49 CC := $(CLANG) $(CLANG_FLAGS) -fintegrated-as
50 else 50 else
51 CC := $(CROSS_COMPILE)gcc 51 CC := $(CROSS_COMPILE)gcc
52 endif # LLVM 52 endif # LLVM
53 53
54 ifeq (0,$(MAKELEVEL)) 54 ifeq (0,$(MAKELEVEL))
55 ifeq ($(OUTPUT),) 55 ifeq ($(OUTPUT),)
56 OUTPUT := $(shell pwd) 56 OUTPUT := $(shell pwd)
57 DEFAULT_INSTALL_HDR_PATH := 1 57 DEFAULT_INSTALL_HDR_PATH := 1
58 endif 58 endif
59 endif 59 endif
60 selfdir = $(realpath $(dir $(filter %/lib.mk,$ 60 selfdir = $(realpath $(dir $(filter %/lib.mk,$(MAKEFILE_LIST))))
61 top_srcdir = $(selfdir)/../../.. 61 top_srcdir = $(selfdir)/../../..
62 62
63 # msg: emit succinct information message descr 63 # msg: emit succinct information message describing current building step
64 # $1 - generic step name (e.g., CC, LINK, etc) 64 # $1 - generic step name (e.g., CC, LINK, etc);
65 # $2 - optional "flavor" specifier; if provide 65 # $2 - optional "flavor" specifier; if provided, will be emitted as [flavor];
66 # $3 - target (assumed to be file); only file 66 # $3 - target (assumed to be file); only file name will be emitted;
67 # $4 - optional extra arg, emitted as-is, if p 67 # $4 - optional extra arg, emitted as-is, if provided.
68 ifeq ($(V),1) 68 ifeq ($(V),1)
69 Q = 69 Q =
70 msg = 70 msg =
71 else 71 else
72 Q = @ 72 Q = @
73 msg = @printf ' %-8s%s %s%s\n' "$(1)" "$(if $ 73 msg = @printf ' %-8s%s %s%s\n' "$(1)" "$(if $(2), [$(2)])" "$(notdir $(3))" "$(if $(4), $(4))";
74 MAKEFLAGS += --no-print-directory 74 MAKEFLAGS += --no-print-directory
75 endif 75 endif
76 76
77 ifeq ($(KHDR_INCLUDES),) 77 ifeq ($(KHDR_INCLUDES),)
78 KHDR_INCLUDES := -isystem $(top_srcdir)/usr/in 78 KHDR_INCLUDES := -isystem $(top_srcdir)/usr/include
79 endif 79 endif
80 80
81 # In order to use newer items that haven't yet 81 # In order to use newer items that haven't yet been added to the user's system
82 # header files, add $(TOOLS_INCLUDES) to the c 82 # header files, add $(TOOLS_INCLUDES) to the compiler invocation in each
83 # each selftest. 83 # each selftest.
84 # You may need to add files to that location, 84 # You may need to add files to that location, or to refresh an existing file. In
85 # order to do that, run "make headers" from $( 85 # order to do that, run "make headers" from $(top_srcdir), then copy the
86 # header file that you want from $(top_srcdir) 86 # header file that you want from $(top_srcdir)/usr/include/... , to the matching
87 # subdir in $(TOOLS_INCLUDE). 87 # subdir in $(TOOLS_INCLUDE).
88 TOOLS_INCLUDES := -isystem $(top_srcdir)/tools 88 TOOLS_INCLUDES := -isystem $(top_srcdir)/tools/include/uapi
89 89
90 # The following are built by lib.mk common com 90 # The following are built by lib.mk common compile rules.
91 # TEST_CUSTOM_PROGS should be used by tests th 91 # TEST_CUSTOM_PROGS should be used by tests that require
92 # custom build rule and prevent common build r 92 # custom build rule and prevent common build rule use.
93 # TEST_PROGS are for test shell scripts. 93 # TEST_PROGS are for test shell scripts.
94 # TEST_CUSTOM_PROGS and TEST_PROGS will be run 94 # TEST_CUSTOM_PROGS and TEST_PROGS will be run by common run_tests
95 # and install targets. Common clean doesn't to 95 # and install targets. Common clean doesn't touch them.
96 TEST_GEN_PROGS := $(patsubst %,$(OUTPUT)/%,$(T 96 TEST_GEN_PROGS := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_PROGS))
97 TEST_GEN_PROGS_EXTENDED := $(patsubst %,$(OUTP 97 TEST_GEN_PROGS_EXTENDED := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_PROGS_EXTENDED))
98 TEST_GEN_FILES := $(patsubst %,$(OUTPUT)/%,$(T 98 TEST_GEN_FILES := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_FILES))
99 99
100 all: $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTEND 100 all: $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES) \
101 $(if $(TEST_GEN_MODS_DIR),gen_mods_dir 101 $(if $(TEST_GEN_MODS_DIR),gen_mods_dir)
102 102
103 define RUN_TESTS 103 define RUN_TESTS
104 BASE_DIR="$(selfdir)"; 104 BASE_DIR="$(selfdir)"; \
105 . $(selfdir)/kselftest/runner.sh; 105 . $(selfdir)/kselftest/runner.sh; \
106 if [ "X$(summary)" != "X" ]; then 106 if [ "X$(summary)" != "X" ]; then \
107 per_test_logging=1; 107 per_test_logging=1; \
108 fi; 108 fi; \
109 run_many $(1) 109 run_many $(1)
110 endef 110 endef
111 111
112 define INSTALL_INCLUDES 112 define INSTALL_INCLUDES
113 $(if $(TEST_INCLUDES), \ 113 $(if $(TEST_INCLUDES), \
114 relative_files=""; \ 114 relative_files=""; \
115 for entry in $(TEST_INCLUDES); 115 for entry in $(TEST_INCLUDES); do \
116 entry_dir=$$(readlink 116 entry_dir=$$(readlink -e "$$(dirname "$$entry")"); \
117 entry_name=$$(basename 117 entry_name=$$(basename "$$entry"); \
118 relative_dir=$${entry_ 118 relative_dir=$${entry_dir#"$$SRC_PATH"/}; \
119 if [ "$$relative_dir" 119 if [ "$$relative_dir" = "$$entry_dir" ]; then \
120 echo "Error: T 120 echo "Error: TEST_INCLUDES entry \"$$entry\" not located inside selftests directory ($$SRC_PATH)" >&2; \
121 exit 1; \ 121 exit 1; \
122 fi; \ 122 fi; \
123 relative_files="$$rela 123 relative_files="$$relative_files $$relative_dir/$$entry_name"; \
124 done; \ 124 done; \
125 cd $(SRC_PATH) && rsync -aR $$ 125 cd $(SRC_PATH) && rsync -aR $$relative_files $(OBJ_PATH)/ \
126 ) 126 )
127 endef 127 endef
128 128
129 run_tests: all 129 run_tests: all
130 ifdef building_out_of_srctree 130 ifdef building_out_of_srctree
131 @if [ "X$(TEST_PROGS)$(TEST_PROGS_EXTE 131 @if [ "X$(TEST_PROGS)$(TEST_PROGS_EXTENDED)$(TEST_FILES)$(TEST_GEN_MODS_DIR)" != "X" ]; then \
132 rsync -aq --copy-unsafe-links 132 rsync -aq --copy-unsafe-links $(TEST_PROGS) $(TEST_PROGS_EXTENDED) $(TEST_FILES) $(TEST_GEN_MODS_DIR) $(OUTPUT); \
133 fi 133 fi
134 @$(INSTALL_INCLUDES) 134 @$(INSTALL_INCLUDES)
135 @if [ "X$(TEST_PROGS)" != "X" ]; then 135 @if [ "X$(TEST_PROGS)" != "X" ]; then \
136 $(call RUN_TESTS, $(TEST_GEN_P 136 $(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS) \
137 $(addprefix 137 $(addprefix $(OUTPUT)/,$(TEST_PROGS))) ; \
138 else \ 138 else \
139 $(call RUN_TESTS, $(TEST_GEN_P 139 $(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS)); \
140 fi 140 fi
141 else 141 else
142 @$(call RUN_TESTS, $(TEST_GEN_PROGS) $ 142 @$(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS) $(TEST_PROGS))
143 endif 143 endif
144 144
145 gen_mods_dir: 145 gen_mods_dir:
146 $(Q)$(MAKE) -C $(TEST_GEN_MODS_DIR) 146 $(Q)$(MAKE) -C $(TEST_GEN_MODS_DIR)
147 147
148 clean_mods_dir: 148 clean_mods_dir:
149 $(Q)$(MAKE) -C $(TEST_GEN_MODS_DIR) cl 149 $(Q)$(MAKE) -C $(TEST_GEN_MODS_DIR) clean
150 150
151 define INSTALL_SINGLE_RULE 151 define INSTALL_SINGLE_RULE
152 $(if $(INSTALL_LIST),@mkdir -p $(INSTA 152 $(if $(INSTALL_LIST),@mkdir -p $(INSTALL_PATH))
153 $(if $(INSTALL_LIST),rsync -a --copy-u 153 $(if $(INSTALL_LIST),rsync -a --copy-unsafe-links $(INSTALL_LIST) $(INSTALL_PATH)/)
154 endef 154 endef
155 155
156 define INSTALL_MODS_RULE 156 define INSTALL_MODS_RULE
157 $(if $(INSTALL_LIST),@mkdir -p $(INSTA 157 $(if $(INSTALL_LIST),@mkdir -p $(INSTALL_PATH)/$(INSTALL_LIST))
158 $(if $(INSTALL_LIST),rsync -a --copy-u 158 $(if $(INSTALL_LIST),rsync -a --copy-unsafe-links $(INSTALL_LIST)/*.ko $(INSTALL_PATH)/$(INSTALL_LIST))
159 endef 159 endef
160 160
161 define INSTALL_RULE 161 define INSTALL_RULE
162 $(eval INSTALL_LIST = $(TEST_PROGS)) $ 162 $(eval INSTALL_LIST = $(TEST_PROGS)) $(INSTALL_SINGLE_RULE)
163 $(eval INSTALL_LIST = $(TEST_PROGS_EXT 163 $(eval INSTALL_LIST = $(TEST_PROGS_EXTENDED)) $(INSTALL_SINGLE_RULE)
164 $(eval INSTALL_LIST = $(TEST_FILES)) $ 164 $(eval INSTALL_LIST = $(TEST_FILES)) $(INSTALL_SINGLE_RULE)
165 $(eval INSTALL_LIST = $(TEST_GEN_PROGS 165 $(eval INSTALL_LIST = $(TEST_GEN_PROGS)) $(INSTALL_SINGLE_RULE)
166 $(eval INSTALL_LIST = $(TEST_CUSTOM_PR 166 $(eval INSTALL_LIST = $(TEST_CUSTOM_PROGS)) $(INSTALL_SINGLE_RULE)
167 $(eval INSTALL_LIST = $(TEST_GEN_PROGS 167 $(eval INSTALL_LIST = $(TEST_GEN_PROGS_EXTENDED)) $(INSTALL_SINGLE_RULE)
168 $(eval INSTALL_LIST = $(TEST_GEN_FILES 168 $(eval INSTALL_LIST = $(TEST_GEN_FILES)) $(INSTALL_SINGLE_RULE)
169 $(eval INSTALL_LIST = $(notdir $(TEST_ 169 $(eval INSTALL_LIST = $(notdir $(TEST_GEN_MODS_DIR))) $(INSTALL_MODS_RULE)
170 $(eval INSTALL_LIST = $(wildcard confi 170 $(eval INSTALL_LIST = $(wildcard config settings)) $(INSTALL_SINGLE_RULE)
171 endef 171 endef
172 172
173 install: all 173 install: all
174 ifdef INSTALL_PATH 174 ifdef INSTALL_PATH
175 $(INSTALL_RULE) 175 $(INSTALL_RULE)
176 $(INSTALL_INCLUDES) 176 $(INSTALL_INCLUDES)
177 else 177 else
178 $(error Error: set INSTALL_PATH to use 178 $(error Error: set INSTALL_PATH to use install)
179 endif 179 endif
180 180
181 emit_tests: 181 emit_tests:
182 for TEST in $(TEST_GEN_PROGS) $(TEST_C 182 for TEST in $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS) $(TEST_PROGS); do \
183 BASENAME_TEST=`basename $$TEST 183 BASENAME_TEST=`basename $$TEST`; \
184 echo "$(COLLECTION):$$BASENAME 184 echo "$(COLLECTION):$$BASENAME_TEST"; \
185 done 185 done
186 186
187 # define if isn't already. It is undefined in 187 # define if isn't already. It is undefined in make O= case.
188 ifeq ($(RM),) 188 ifeq ($(RM),)
189 RM := rm -f 189 RM := rm -f
190 endif 190 endif
191 191
192 define CLEAN 192 define CLEAN
193 $(RM) -r $(TEST_GEN_PROGS) $(TEST_GEN_ 193 $(RM) -r $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES) $(EXTRA_CLEAN)
194 endef 194 endef
195 195
196 clean: $(if $(TEST_GEN_MODS_DIR),clean_mods_di 196 clean: $(if $(TEST_GEN_MODS_DIR),clean_mods_dir)
197 $(CLEAN) 197 $(CLEAN)
198 198
199 # Build with _GNU_SOURCE by default 199 # Build with _GNU_SOURCE by default
200 CFLAGS += -D_GNU_SOURCE= 200 CFLAGS += -D_GNU_SOURCE=
201 201
202 # Enables to extend CFLAGS and LDFLAGS from co 202 # Enables to extend CFLAGS and LDFLAGS from command line, e.g.
203 # make USERCFLAGS=-Werror USERLDFLAGS=-static 203 # make USERCFLAGS=-Werror USERLDFLAGS=-static
204 CFLAGS += $(USERCFLAGS) 204 CFLAGS += $(USERCFLAGS)
205 LDFLAGS += $(USERLDFLAGS) 205 LDFLAGS += $(USERLDFLAGS)
206 206
207 # When make O= with kselftest target from main 207 # When make O= with kselftest target from main level
208 # the following aren't defined. 208 # the following aren't defined.
209 # 209 #
210 ifdef building_out_of_srctree 210 ifdef building_out_of_srctree
211 LINK.c = $(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS 211 LINK.c = $(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) $(TARGET_ARCH)
212 COMPILE.S = $(CC) $(ASFLAGS) $(CPPFLAGS) $(TAR 212 COMPILE.S = $(CC) $(ASFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c
213 LINK.S = $(CC) $(ASFLAGS) $(CPPFLAGS) $(LDFLAG 213 LINK.S = $(CC) $(ASFLAGS) $(CPPFLAGS) $(LDFLAGS) $(TARGET_ARCH)
214 endif 214 endif
215 215
216 # Selftest makefiles can override those target 216 # Selftest makefiles can override those targets by setting
217 # OVERRIDE_TARGETS = 1. 217 # OVERRIDE_TARGETS = 1.
218 ifeq ($(OVERRIDE_TARGETS),) 218 ifeq ($(OVERRIDE_TARGETS),)
219 LOCAL_HDRS += $(selfdir)/kselftest_harness.h $ 219 LOCAL_HDRS += $(selfdir)/kselftest_harness.h $(selfdir)/kselftest.h
220 $(OUTPUT)/%:%.c $(LOCAL_HDRS) 220 $(OUTPUT)/%:%.c $(LOCAL_HDRS)
221 $(call msg,CC,,$@) 221 $(call msg,CC,,$@)
222 $(Q)$(LINK.c) $(filter-out $(LOCAL_HDR 222 $(Q)$(LINK.c) $(filter-out $(LOCAL_HDRS),$^) $(LDLIBS) -o $@
223 223
224 $(OUTPUT)/%.o:%.S 224 $(OUTPUT)/%.o:%.S
225 $(COMPILE.S) $^ -o $@ 225 $(COMPILE.S) $^ -o $@
226 226
227 $(OUTPUT)/%:%.S 227 $(OUTPUT)/%:%.S
228 $(LINK.S) $^ $(LDLIBS) -o $@ 228 $(LINK.S) $^ $(LDLIBS) -o $@
229 endif 229 endif
230 230
231 .PHONY: run_tests all clean install emit_tests 231 .PHONY: run_tests all clean install emit_tests gen_mods_dir clean_mods_dir
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