1 # SPDX-License-Identifier: GPL-2.0
3 # Makefile for some libs needed in the kernel.
6 ccflags-remove-$(CONFIG_FUNCTION_TRACER) += $(CC_FLAGS_FTRACE)
8 # These files are disabled because they produce lots of non-interesting and/or
9 # flaky coverage that is not a function of syscall inputs. For example,
10 # rbtree can be global and individual rotations don't correlate with inputs.
11 KCOV_INSTRUMENT_string.o := n
12 KCOV_INSTRUMENT_rbtree.o := n
13 KCOV_INSTRUMENT_list_debug.o := n
14 KCOV_INSTRUMENT_debugobjects.o := n
15 KCOV_INSTRUMENT_dynamic_debug.o := n
16 KCOV_INSTRUMENT_fault-inject.o := n
18 # string.o implements standard library functions like memset/memcpy etc.
19 # Use -ffreestanding to ensure that the compiler does not try to "optimize"
20 # them into calls to themselves.
21 CFLAGS_string.o := -ffreestanding
23 # Early boot use of cmdline, don't instrument it
24 ifdef CONFIG_AMD_MEM_ENCRYPT
25 KASAN_SANITIZE_string.o := n
27 CFLAGS_string.o += -fno-stack-protector
30 lib-y := ctype.o string.o vsprintf.o cmdline.o \
31 rbtree.o radix-tree.o timerqueue.o xarray.o \
32 idr.o extable.o sha1.o irq_regs.o argv_split.o \
33 flex_proportions.o ratelimit.o show_mem.o \
34 is_single_threaded.o plist.o decompress.o kobject_uevent.o \
35 earlycpio.o seq_buf.o siphash.o dec_and_lock.o \
36 nmi_backtrace.o nodemask.o win_minmax.o memcat_p.o \
39 lib-$(CONFIG_PRINTK) += dump_stack.o
40 lib-$(CONFIG_SMP) += cpumask.o
42 lib-y += kobject.o klist.o
45 obj-y += bcd.o sort.o parser.o debug_locks.o random32.o \
46 bust_spinlocks.o kasprintf.o bitmap.o scatterlist.o \
47 list_sort.o uuid.o iov_iter.o clz_ctz.o \
48 bsearch.o find_bit.o llist.o memweight.o kfifo.o \
49 percpu-refcount.o rhashtable.o \
50 once.o refcount.o usercopy.o errseq.o bucket_locks.o \
52 obj-$(CONFIG_STRING_SELFTEST) += test_string.o
53 obj-y += string_helpers.o
54 obj-$(CONFIG_TEST_STRING_HELPERS) += test-string_helpers.o
56 obj-$(CONFIG_TEST_HEXDUMP) += test_hexdump.o
58 obj-$(CONFIG_FIND_BIT_BENCHMARK) += find_bit_benchmark.o
59 obj-$(CONFIG_TEST_BPF) += test_bpf.o
60 obj-$(CONFIG_TEST_FIRMWARE) += test_firmware.o
61 obj-$(CONFIG_TEST_BITOPS) += test_bitops.o
62 CFLAGS_test_bitops.o += -Werror
63 obj-$(CONFIG_TEST_SYSCTL) += test_sysctl.o
64 obj-$(CONFIG_TEST_SIPHASH) += test_siphash.o
65 obj-$(CONFIG_HASH_KUNIT_TEST) += test_hash.o
66 obj-$(CONFIG_TEST_IDA) += test_ida.o
67 obj-$(CONFIG_KASAN_KUNIT_TEST) += test_kasan.o
68 CFLAGS_test_kasan.o += -fno-builtin
69 CFLAGS_test_kasan.o += $(call cc-disable-warning, vla)
70 obj-$(CONFIG_KASAN_MODULE_TEST) += test_kasan_module.o
71 CFLAGS_test_kasan_module.o += -fno-builtin
72 obj-$(CONFIG_TEST_UBSAN) += test_ubsan.o
73 CFLAGS_test_ubsan.o += $(call cc-disable-warning, vla)
74 UBSAN_SANITIZE_test_ubsan.o := y
75 obj-$(CONFIG_TEST_KSTRTOX) += test-kstrtox.o
76 obj-$(CONFIG_TEST_LIST_SORT) += test_list_sort.o
77 obj-$(CONFIG_TEST_MIN_HEAP) += test_min_heap.o
78 obj-$(CONFIG_TEST_LKM) += test_module.o
79 obj-$(CONFIG_TEST_VMALLOC) += test_vmalloc.o
80 obj-$(CONFIG_TEST_RHASHTABLE) += test_rhashtable.o
81 obj-$(CONFIG_TEST_SORT) += test_sort.o
82 obj-$(CONFIG_TEST_USER_COPY) += test_user_copy.o
83 obj-$(CONFIG_TEST_STATIC_KEYS) += test_static_keys.o
84 obj-$(CONFIG_TEST_STATIC_KEYS) += test_static_key_base.o
85 obj-$(CONFIG_TEST_PRINTF) += test_printf.o
86 obj-$(CONFIG_TEST_SCANF) += test_scanf.o
87 obj-$(CONFIG_TEST_BITMAP) += test_bitmap.o
88 obj-$(CONFIG_TEST_STRSCPY) += test_strscpy.o
89 obj-$(CONFIG_TEST_UUID) += test_uuid.o
90 obj-$(CONFIG_TEST_XARRAY) += test_xarray.o
91 obj-$(CONFIG_TEST_PARMAN) += test_parman.o
92 obj-$(CONFIG_TEST_KMOD) += test_kmod.o
93 obj-$(CONFIG_TEST_DEBUG_VIRTUAL) += test_debug_virtual.o
94 obj-$(CONFIG_TEST_MEMCAT_P) += test_memcat_p.o
95 obj-$(CONFIG_TEST_OBJAGG) += test_objagg.o
96 obj-$(CONFIG_TEST_BLACKHOLE_DEV) += test_blackhole_dev.o
97 obj-$(CONFIG_TEST_MEMINIT) += test_meminit.o
98 obj-$(CONFIG_TEST_LOCKUP) += test_lockup.o
99 obj-$(CONFIG_TEST_HMM) += test_hmm.o
100 obj-$(CONFIG_TEST_FREE_PAGES) += test_free_pages.o
101 obj-$(CONFIG_KPROBES_SANITY_TEST) += test_kprobes.o
102 obj-$(CONFIG_TEST_REF_TRACKER) += test_ref_tracker.o
103 CFLAGS_test_fprobe.o += $(CC_FLAGS_FTRACE)
104 obj-$(CONFIG_FPROBE_SANITY_TEST) += test_fprobe.o
106 # CFLAGS for compiling floating point code inside the kernel. x86/Makefile turns
107 # off the generation of FPU/SSE* instructions for kernel proper but FPU_FLAGS
108 # get appended last to CFLAGS and thus override those previous compiler options.
110 FPU_CFLAGS := -msse -msse2
111 ifdef CONFIG_CC_IS_GCC
112 # Stack alignment mismatch, proceed with caution.
113 # GCC < 7.1 cannot compile code using `double` and -mpreferred-stack-boundary=3
114 # (8B stack alignment).
115 # See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53383
117 # The "-msse" in the first argument is there so that the
118 # -mpreferred-stack-boundary=3 build error:
120 # -mpreferred-stack-boundary=3 is not between 4 and 12
122 # can be triggered. Otherwise gcc doesn't complain.
123 FPU_CFLAGS += -mhard-float
124 FPU_CFLAGS += $(call cc-option,-msse -mpreferred-stack-boundary=3,-mpreferred-stack-boundary=4)
127 obj-$(CONFIG_TEST_FPU) += test_fpu.o
128 CFLAGS_test_fpu.o += $(FPU_CFLAGS)
130 obj-$(CONFIG_TEST_LIVEPATCH) += livepatch/
132 obj-$(CONFIG_KUNIT) += kunit/
134 ifeq ($(CONFIG_DEBUG_KOBJECT),y)
135 CFLAGS_kobject.o += -DDEBUG
136 CFLAGS_kobject_uevent.o += -DDEBUG
139 obj-$(CONFIG_DEBUG_INFO_REDUCED) += debug_info.o
140 CFLAGS_debug_info.o += $(call cc-option, -femit-struct-debug-detailed=any)
142 obj-y += math/ crypto/
144 obj-$(CONFIG_GENERIC_IOMAP) += iomap.o
145 obj-$(CONFIG_GENERIC_PCI_IOMAP) += pci_iomap.o
146 obj-$(CONFIG_HAS_IOMEM) += iomap_copy.o devres.o
147 obj-$(CONFIG_CHECK_SIGNATURE) += check_signature.o
148 obj-$(CONFIG_DEBUG_LOCKING_API_SELFTESTS) += locking-selftest.o
152 lib-$(CONFIG_INDIRECT_IOMEM) += logic_iomem.o
154 obj-$(CONFIG_GENERIC_HWEIGHT) += hweight.o
156 obj-$(CONFIG_BTREE) += btree.o
157 obj-$(CONFIG_INTERVAL_TREE) += interval_tree.o
158 obj-$(CONFIG_ASSOCIATIVE_ARRAY) += assoc_array.o
159 obj-$(CONFIG_DEBUG_PREEMPT) += smp_processor_id.o
160 obj-$(CONFIG_DEBUG_LIST) += list_debug.o
161 obj-$(CONFIG_DEBUG_OBJECTS) += debugobjects.o
163 obj-$(CONFIG_BITREVERSE) += bitrev.o
164 obj-$(CONFIG_LINEAR_RANGES) += linear_ranges.o
165 obj-$(CONFIG_PACKING) += packing.o
166 obj-$(CONFIG_CRC_CCITT) += crc-ccitt.o
167 obj-$(CONFIG_CRC16) += crc16.o
168 obj-$(CONFIG_CRC_T10DIF)+= crc-t10dif.o
169 obj-$(CONFIG_CRC_ITU_T) += crc-itu-t.o
170 obj-$(CONFIG_CRC32) += crc32.o
171 obj-$(CONFIG_CRC64) += crc64.o
172 obj-$(CONFIG_CRC32_SELFTEST) += crc32test.o
173 obj-$(CONFIG_CRC4) += crc4.o
174 obj-$(CONFIG_CRC7) += crc7.o
175 obj-$(CONFIG_LIBCRC32C) += libcrc32c.o
176 obj-$(CONFIG_CRC8) += crc8.o
177 obj-$(CONFIG_CRC64_ROCKSOFT) += crc64-rocksoft.o
178 obj-$(CONFIG_XXHASH) += xxhash.o
179 obj-$(CONFIG_GENERIC_ALLOCATOR) += genalloc.o
181 obj-$(CONFIG_842_COMPRESS) += 842/
182 obj-$(CONFIG_842_DECOMPRESS) += 842/
183 obj-$(CONFIG_ZLIB_INFLATE) += zlib_inflate/
184 obj-$(CONFIG_ZLIB_DEFLATE) += zlib_deflate/
185 obj-$(CONFIG_ZLIB_DFLTCC) += zlib_dfltcc/
186 obj-$(CONFIG_REED_SOLOMON) += reed_solomon/
187 obj-$(CONFIG_BCH) += bch.o
188 obj-$(CONFIG_LZO_COMPRESS) += lzo/
189 obj-$(CONFIG_LZO_DECOMPRESS) += lzo/
190 obj-$(CONFIG_LZ4_COMPRESS) += lz4/
191 obj-$(CONFIG_LZ4HC_COMPRESS) += lz4/
192 obj-$(CONFIG_LZ4_DECOMPRESS) += lz4/
193 obj-$(CONFIG_ZSTD_COMPRESS) += zstd/
194 obj-$(CONFIG_ZSTD_DECOMPRESS) += zstd/
195 obj-$(CONFIG_XZ_DEC) += xz/
196 obj-$(CONFIG_RAID6_PQ) += raid6/
198 lib-$(CONFIG_DECOMPRESS_GZIP) += decompress_inflate.o
199 lib-$(CONFIG_DECOMPRESS_BZIP2) += decompress_bunzip2.o
200 lib-$(CONFIG_DECOMPRESS_LZMA) += decompress_unlzma.o
201 lib-$(CONFIG_DECOMPRESS_XZ) += decompress_unxz.o
202 lib-$(CONFIG_DECOMPRESS_LZO) += decompress_unlzo.o
203 lib-$(CONFIG_DECOMPRESS_LZ4) += decompress_unlz4.o
204 lib-$(CONFIG_DECOMPRESS_ZSTD) += decompress_unzstd.o
206 obj-$(CONFIG_TEXTSEARCH) += textsearch.o
207 obj-$(CONFIG_TEXTSEARCH_KMP) += ts_kmp.o
208 obj-$(CONFIG_TEXTSEARCH_BM) += ts_bm.o
209 obj-$(CONFIG_TEXTSEARCH_FSM) += ts_fsm.o
210 obj-$(CONFIG_SMP) += percpu_counter.o
211 obj-$(CONFIG_AUDIT_GENERIC) += audit.o
212 obj-$(CONFIG_AUDIT_COMPAT_GENERIC) += compat_audit.o
214 obj-$(CONFIG_IOMMU_HELPER) += iommu-helper.o
215 obj-$(CONFIG_FAULT_INJECTION) += fault-inject.o
216 obj-$(CONFIG_FAULT_INJECTION_USERCOPY) += fault-inject-usercopy.o
217 obj-$(CONFIG_NOTIFIER_ERROR_INJECTION) += notifier-error-inject.o
218 obj-$(CONFIG_PM_NOTIFIER_ERROR_INJECT) += pm-notifier-error-inject.o
219 obj-$(CONFIG_NETDEV_NOTIFIER_ERROR_INJECT) += netdev-notifier-error-inject.o
220 obj-$(CONFIG_MEMORY_NOTIFIER_ERROR_INJECT) += memory-notifier-error-inject.o
221 obj-$(CONFIG_OF_RECONFIG_NOTIFIER_ERROR_INJECT) += \
222 of-reconfig-notifier-error-inject.o
223 obj-$(CONFIG_FUNCTION_ERROR_INJECTION) += error-inject.o
225 lib-$(CONFIG_GENERIC_BUG) += bug.o
227 obj-$(CONFIG_HAVE_ARCH_TRACEHOOK) += syscall.o
229 obj-$(CONFIG_DYNAMIC_DEBUG_CORE) += dynamic_debug.o
230 obj-$(CONFIG_SYMBOLIC_ERRNAME) += errname.o
232 obj-$(CONFIG_NLATTR) += nlattr.o
234 obj-$(CONFIG_LRU_CACHE) += lru_cache.o
236 obj-$(CONFIG_GENERIC_CSUM) += checksum.o
238 obj-$(CONFIG_GENERIC_ATOMIC64) += atomic64.o
240 obj-$(CONFIG_ATOMIC64_SELFTEST) += atomic64_test.o
242 obj-$(CONFIG_CPU_RMAP) += cpu_rmap.o
244 obj-$(CONFIG_DQL) += dynamic_queue_limits.o
246 obj-$(CONFIG_GLOB) += glob.o
247 obj-$(CONFIG_GLOB_SELFTEST) += globtest.o
249 obj-$(CONFIG_MPILIB) += mpi/
250 obj-$(CONFIG_DIMLIB) += dim/
251 obj-$(CONFIG_SIGNATURE) += digsig.o
253 lib-$(CONFIG_CLZ_TAB) += clz_tab.o
254 lib-$(CONFIG_LIB_MEMNEQ) += memneq.o
256 obj-$(CONFIG_GENERIC_STRNCPY_FROM_USER) += strncpy_from_user.o
257 obj-$(CONFIG_GENERIC_STRNLEN_USER) += strnlen_user.o
259 obj-$(CONFIG_GENERIC_NET_UTILS) += net_utils.o
261 obj-$(CONFIG_SG_SPLIT) += sg_split.o
262 obj-$(CONFIG_SG_POOL) += sg_pool.o
263 obj-$(CONFIG_MEMREGION) += memregion.o
264 obj-$(CONFIG_STMP_DEVICE) += stmp_device.o
265 obj-$(CONFIG_IRQ_POLL) += irq_poll.o
267 obj-$(CONFIG_POLYNOMIAL) += polynomial.o
269 # stackdepot.c should not be instrumented or call instrumented functions.
270 # Prevent the compiler from calling builtins like memcmp() or bcmp() from this
272 CFLAGS_stackdepot.o += -fno-builtin
273 obj-$(CONFIG_STACKDEPOT) += stackdepot.o
274 KASAN_SANITIZE_stackdepot.o := n
275 KCOV_INSTRUMENT_stackdepot.o := n
277 obj-$(CONFIG_REF_TRACKER) += ref_tracker.o
279 libfdt_files = fdt.o fdt_ro.o fdt_wip.o fdt_rw.o fdt_sw.o fdt_strerror.o \
280 fdt_empty_tree.o fdt_addresses.o
281 $(foreach file, $(libfdt_files), \
282 $(eval CFLAGS_$(file) = -I $(srctree)/scripts/dtc/libfdt))
283 lib-$(CONFIG_LIBFDT) += $(libfdt_files)
285 obj-$(CONFIG_BOOT_CONFIG) += bootconfig.o
286 obj-$(CONFIG_BOOT_CONFIG_EMBED) += bootconfig-data.o
288 $(obj)/bootconfig-data.o: $(obj)/default.bconf
290 targets += default.bconf
291 filechk_defbconf = cat $(or $(real-prereqs), /dev/null)
292 $(obj)/default.bconf: $(CONFIG_BOOT_CONFIG_EMBED_FILE) FORCE
293 $(call filechk,defbconf)
295 obj-$(CONFIG_RBTREE_TEST) += rbtree_test.o
296 obj-$(CONFIG_INTERVAL_TREE_TEST) += interval_tree_test.o
298 obj-$(CONFIG_PERCPU_TEST) += percpu_test.o
300 obj-$(CONFIG_ASN1) += asn1_decoder.o
301 obj-$(CONFIG_ASN1_ENCODER) += asn1_encoder.o
303 obj-$(CONFIG_FONT_SUPPORT) += fonts/
305 hostprogs := gen_crc32table
306 hostprogs += gen_crc64table
307 clean-files := crc32table.h
308 clean-files += crc64table.h
310 $(obj)/crc32.o: $(obj)/crc32table.h
312 quiet_cmd_crc32 = GEN $@
315 $(obj)/crc32table.h: $(obj)/gen_crc32table
318 $(obj)/crc64.o: $(obj)/crc64table.h
320 quiet_cmd_crc64 = GEN $@
323 $(obj)/crc64table.h: $(obj)/gen_crc64table
327 # Build a fast OID lookip registry from include/linux/oid_registry.h
329 obj-$(CONFIG_OID_REGISTRY) += oid_registry.o
331 $(obj)/oid_registry.o: $(obj)/oid_registry_data.c
333 $(obj)/oid_registry_data.c: $(srctree)/include/linux/oid_registry.h \
334 $(src)/build_OID_registry
335 $(call cmd,build_OID_registry)
337 quiet_cmd_build_OID_registry = GEN $@
338 cmd_build_OID_registry = perl $(srctree)/$(src)/build_OID_registry $< $@
340 clean-files += oid_registry_data.c
342 obj-$(CONFIG_UCS2_STRING) += ucs2_string.o
343 ifneq ($(CONFIG_UBSAN_TRAP),y)
344 obj-$(CONFIG_UBSAN) += ubsan.o
347 UBSAN_SANITIZE_ubsan.o := n
348 KASAN_SANITIZE_ubsan.o := n
349 KCSAN_SANITIZE_ubsan.o := n
350 CFLAGS_ubsan.o := -fno-stack-protector $(DISABLE_STACKLEAK_PLUGIN)
352 obj-$(CONFIG_SBITMAP) += sbitmap.o
354 obj-$(CONFIG_PARMAN) += parman.o
356 # GCC library routines
357 obj-$(CONFIG_GENERIC_LIB_ASHLDI3) += ashldi3.o
358 obj-$(CONFIG_GENERIC_LIB_ASHRDI3) += ashrdi3.o
359 obj-$(CONFIG_GENERIC_LIB_LSHRDI3) += lshrdi3.o
360 obj-$(CONFIG_GENERIC_LIB_MULDI3) += muldi3.o
361 obj-$(CONFIG_GENERIC_LIB_CMPDI2) += cmpdi2.o
362 obj-$(CONFIG_GENERIC_LIB_UCMPDI2) += ucmpdi2.o
363 obj-$(CONFIG_OBJAGG) += objagg.o
366 obj-$(CONFIG_PLDMFW) += pldmfw/
369 CFLAGS_bitfield_kunit.o := $(DISABLE_STRUCTLEAK_PLUGIN)
370 obj-$(CONFIG_BITFIELD_KUNIT) += bitfield_kunit.o
371 obj-$(CONFIG_LIST_KUNIT_TEST) += list-test.o
372 obj-$(CONFIG_LINEAR_RANGES_TEST) += test_linear_ranges.o
373 obj-$(CONFIG_BITS_TEST) += test_bits.o
374 obj-$(CONFIG_CMDLINE_KUNIT_TEST) += cmdline_kunit.o
375 obj-$(CONFIG_SLUB_KUNIT_TEST) += slub_kunit.o
376 obj-$(CONFIG_MEMCPY_KUNIT_TEST) += memcpy_kunit.o
377 obj-$(CONFIG_OVERFLOW_KUNIT_TEST) += overflow_kunit.o
378 CFLAGS_stackinit_kunit.o += $(call cc-disable-warning, switch-unreachable)
379 obj-$(CONFIG_STACKINIT_KUNIT_TEST) += stackinit_kunit.o
381 obj-$(CONFIG_GENERIC_LIB_DEVMEM_IS_ALLOWED) += devmem_is_allowed.o
383 # FORTIFY_SOURCE compile-time behavior tests
384 TEST_FORTIFY_SRCS = $(wildcard $(srctree)/$(src)/test_fortify/*-*.c)
385 TEST_FORTIFY_LOGS = $(patsubst $(srctree)/$(src)/%.c, %.log, $(TEST_FORTIFY_SRCS))
386 TEST_FORTIFY_LOG = test_fortify.log
388 quiet_cmd_test_fortify = TEST $@
389 cmd_test_fortify = $(CONFIG_SHELL) $(srctree)/scripts/test_fortify.sh \
390 $< $@ "$(NM)" $(CC) $(c_flags) \
391 $(call cc-disable-warning,fortify-source) \
394 targets += $(TEST_FORTIFY_LOGS)
395 clean-files += $(TEST_FORTIFY_LOGS)
396 clean-files += $(addsuffix .o, $(TEST_FORTIFY_LOGS))
397 $(obj)/test_fortify/%.log: $(src)/test_fortify/%.c \
398 $(src)/test_fortify/test_fortify.h \
399 $(srctree)/include/linux/fortify-string.h \
400 $(srctree)/scripts/test_fortify.sh \
402 $(call if_changed,test_fortify)
404 quiet_cmd_gen_fortify_log = GEN $@
405 cmd_gen_fortify_log = cat </dev/null $(filter-out FORCE,$^) 2>/dev/null > $@ || true
407 targets += $(TEST_FORTIFY_LOG)
408 clean-files += $(TEST_FORTIFY_LOG)
409 $(obj)/$(TEST_FORTIFY_LOG): $(addprefix $(obj)/, $(TEST_FORTIFY_LOGS)) FORCE
410 $(call if_changed,gen_fortify_log)
412 # Fake dependency to trigger the fortify tests.
413 ifeq ($(CONFIG_FORTIFY_SOURCE),y)
414 $(obj)/string.o: $(obj)/$(TEST_FORTIFY_LOG)