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_HASH) += test_hash.o test_siphash.o
65 obj-$(CONFIG_TEST_IDA) += test_ida.o
66 obj-$(CONFIG_KASAN_KUNIT_TEST) += test_kasan.o
67 CFLAGS_test_kasan.o += -fno-builtin
68 CFLAGS_test_kasan.o += $(call cc-disable-warning, vla)
69 obj-$(CONFIG_KASAN_MODULE_TEST) += test_kasan_module.o
70 CFLAGS_test_kasan_module.o += -fno-builtin
71 obj-$(CONFIG_TEST_UBSAN) += test_ubsan.o
72 CFLAGS_test_ubsan.o += $(call cc-disable-warning, vla)
73 UBSAN_SANITIZE_test_ubsan.o := y
74 obj-$(CONFIG_TEST_KSTRTOX) += test-kstrtox.o
75 obj-$(CONFIG_TEST_LIST_SORT) += test_list_sort.o
76 obj-$(CONFIG_TEST_MIN_HEAP) += test_min_heap.o
77 obj-$(CONFIG_TEST_LKM) += test_module.o
78 obj-$(CONFIG_TEST_VMALLOC) += test_vmalloc.o
79 obj-$(CONFIG_TEST_OVERFLOW) += test_overflow.o
80 obj-$(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 CFLAGS_test_stackinit.o += $(call cc-disable-warning, switch-unreachable)
97 obj-$(CONFIG_TEST_STACKINIT) += test_stackinit.o
98 obj-$(CONFIG_TEST_BLACKHOLE_DEV) += test_blackhole_dev.o
99 obj-$(CONFIG_TEST_MEMINIT) += test_meminit.o
100 obj-$(CONFIG_TEST_LOCKUP) += test_lockup.o
101 obj-$(CONFIG_TEST_HMM) += test_hmm.o
102 obj-$(CONFIG_TEST_FREE_PAGES) += test_free_pages.o
105 # CFLAGS for compiling floating point code inside the kernel. x86/Makefile turns
106 # off the generation of FPU/SSE* instructions for kernel proper but FPU_FLAGS
107 # get appended last to CFLAGS and thus override those previous compiler options.
109 FPU_CFLAGS := -msse -msse2
110 ifdef CONFIG_CC_IS_GCC
111 # Stack alignment mismatch, proceed with caution.
112 # GCC < 7.1 cannot compile code using `double` and -mpreferred-stack-boundary=3
113 # (8B stack alignment).
114 # See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53383
116 # The "-msse" in the first argument is there so that the
117 # -mpreferred-stack-boundary=3 build error:
119 # -mpreferred-stack-boundary=3 is not between 4 and 12
121 # can be triggered. Otherwise gcc doesn't complain.
122 FPU_CFLAGS += -mhard-float
123 FPU_CFLAGS += $(call cc-option,-msse -mpreferred-stack-boundary=3,-mpreferred-stack-boundary=4)
126 obj-$(CONFIG_TEST_FPU) += test_fpu.o
127 CFLAGS_test_fpu.o += $(FPU_CFLAGS)
129 obj-$(CONFIG_TEST_LIVEPATCH) += livepatch/
131 obj-$(CONFIG_KUNIT) += kunit/
133 ifeq ($(CONFIG_DEBUG_KOBJECT),y)
134 CFLAGS_kobject.o += -DDEBUG
135 CFLAGS_kobject_uevent.o += -DDEBUG
138 obj-$(CONFIG_DEBUG_INFO_REDUCED) += debug_info.o
139 CFLAGS_debug_info.o += $(call cc-option, -femit-struct-debug-detailed=any)
141 obj-y += math/ crypto/
143 obj-$(CONFIG_GENERIC_IOMAP) += iomap.o
144 obj-$(CONFIG_GENERIC_PCI_IOMAP) += pci_iomap.o
145 obj-$(CONFIG_HAS_IOMEM) += iomap_copy.o devres.o
146 obj-$(CONFIG_CHECK_SIGNATURE) += check_signature.o
147 obj-$(CONFIG_DEBUG_LOCKING_API_SELFTESTS) += locking-selftest.o
151 lib-$(CONFIG_INDIRECT_IOMEM) += logic_iomem.o
153 obj-$(CONFIG_GENERIC_HWEIGHT) += hweight.o
155 obj-$(CONFIG_BTREE) += btree.o
156 obj-$(CONFIG_INTERVAL_TREE) += interval_tree.o
157 obj-$(CONFIG_ASSOCIATIVE_ARRAY) += assoc_array.o
158 obj-$(CONFIG_DEBUG_PREEMPT) += smp_processor_id.o
159 obj-$(CONFIG_DEBUG_LIST) += list_debug.o
160 obj-$(CONFIG_DEBUG_OBJECTS) += debugobjects.o
162 obj-$(CONFIG_BITREVERSE) += bitrev.o
163 obj-$(CONFIG_LINEAR_RANGES) += linear_ranges.o
164 obj-$(CONFIG_PACKING) += packing.o
165 obj-$(CONFIG_CRC_CCITT) += crc-ccitt.o
166 obj-$(CONFIG_CRC16) += crc16.o
167 obj-$(CONFIG_CRC_T10DIF)+= crc-t10dif.o
168 obj-$(CONFIG_CRC_ITU_T) += crc-itu-t.o
169 obj-$(CONFIG_CRC32) += crc32.o
170 obj-$(CONFIG_CRC64) += crc64.o
171 obj-$(CONFIG_CRC32_SELFTEST) += crc32test.o
172 obj-$(CONFIG_CRC4) += crc4.o
173 obj-$(CONFIG_CRC7) += crc7.o
174 obj-$(CONFIG_LIBCRC32C) += libcrc32c.o
175 obj-$(CONFIG_CRC8) += crc8.o
176 obj-$(CONFIG_XXHASH) += xxhash.o
177 obj-$(CONFIG_GENERIC_ALLOCATOR) += genalloc.o
179 obj-$(CONFIG_842_COMPRESS) += 842/
180 obj-$(CONFIG_842_DECOMPRESS) += 842/
181 obj-$(CONFIG_ZLIB_INFLATE) += zlib_inflate/
182 obj-$(CONFIG_ZLIB_DEFLATE) += zlib_deflate/
183 obj-$(CONFIG_ZLIB_DFLTCC) += zlib_dfltcc/
184 obj-$(CONFIG_REED_SOLOMON) += reed_solomon/
185 obj-$(CONFIG_BCH) += bch.o
186 obj-$(CONFIG_LZO_COMPRESS) += lzo/
187 obj-$(CONFIG_LZO_DECOMPRESS) += lzo/
188 obj-$(CONFIG_LZ4_COMPRESS) += lz4/
189 obj-$(CONFIG_LZ4HC_COMPRESS) += lz4/
190 obj-$(CONFIG_LZ4_DECOMPRESS) += lz4/
191 obj-$(CONFIG_ZSTD_COMPRESS) += zstd/
192 obj-$(CONFIG_ZSTD_DECOMPRESS) += zstd/
193 obj-$(CONFIG_XZ_DEC) += xz/
194 obj-$(CONFIG_RAID6_PQ) += raid6/
196 lib-$(CONFIG_DECOMPRESS_GZIP) += decompress_inflate.o
197 lib-$(CONFIG_DECOMPRESS_BZIP2) += decompress_bunzip2.o
198 lib-$(CONFIG_DECOMPRESS_LZMA) += decompress_unlzma.o
199 lib-$(CONFIG_DECOMPRESS_XZ) += decompress_unxz.o
200 lib-$(CONFIG_DECOMPRESS_LZO) += decompress_unlzo.o
201 lib-$(CONFIG_DECOMPRESS_LZ4) += decompress_unlz4.o
202 lib-$(CONFIG_DECOMPRESS_ZSTD) += decompress_unzstd.o
204 obj-$(CONFIG_TEXTSEARCH) += textsearch.o
205 obj-$(CONFIG_TEXTSEARCH_KMP) += ts_kmp.o
206 obj-$(CONFIG_TEXTSEARCH_BM) += ts_bm.o
207 obj-$(CONFIG_TEXTSEARCH_FSM) += ts_fsm.o
208 obj-$(CONFIG_SMP) += percpu_counter.o
209 obj-$(CONFIG_AUDIT_GENERIC) += audit.o
210 obj-$(CONFIG_AUDIT_COMPAT_GENERIC) += compat_audit.o
212 obj-$(CONFIG_IOMMU_HELPER) += iommu-helper.o
213 obj-$(CONFIG_FAULT_INJECTION) += fault-inject.o
214 obj-$(CONFIG_FAULT_INJECTION_USERCOPY) += fault-inject-usercopy.o
215 obj-$(CONFIG_NOTIFIER_ERROR_INJECTION) += notifier-error-inject.o
216 obj-$(CONFIG_PM_NOTIFIER_ERROR_INJECT) += pm-notifier-error-inject.o
217 obj-$(CONFIG_NETDEV_NOTIFIER_ERROR_INJECT) += netdev-notifier-error-inject.o
218 obj-$(CONFIG_MEMORY_NOTIFIER_ERROR_INJECT) += memory-notifier-error-inject.o
219 obj-$(CONFIG_OF_RECONFIG_NOTIFIER_ERROR_INJECT) += \
220 of-reconfig-notifier-error-inject.o
221 obj-$(CONFIG_FUNCTION_ERROR_INJECTION) += error-inject.o
223 lib-$(CONFIG_GENERIC_BUG) += bug.o
225 obj-$(CONFIG_HAVE_ARCH_TRACEHOOK) += syscall.o
227 obj-$(CONFIG_DYNAMIC_DEBUG_CORE) += dynamic_debug.o
228 obj-$(CONFIG_SYMBOLIC_ERRNAME) += errname.o
230 obj-$(CONFIG_NLATTR) += nlattr.o
232 obj-$(CONFIG_LRU_CACHE) += lru_cache.o
234 obj-$(CONFIG_GENERIC_CSUM) += checksum.o
236 obj-$(CONFIG_GENERIC_ATOMIC64) += atomic64.o
238 obj-$(CONFIG_ATOMIC64_SELFTEST) += atomic64_test.o
240 obj-$(CONFIG_CPU_RMAP) += cpu_rmap.o
242 obj-$(CONFIG_DQL) += dynamic_queue_limits.o
244 obj-$(CONFIG_GLOB) += glob.o
245 obj-$(CONFIG_GLOB_SELFTEST) += globtest.o
247 obj-$(CONFIG_MPILIB) += mpi/
248 obj-$(CONFIG_DIMLIB) += dim/
249 obj-$(CONFIG_SIGNATURE) += digsig.o
251 lib-$(CONFIG_CLZ_TAB) += clz_tab.o
253 obj-$(CONFIG_GENERIC_STRNCPY_FROM_USER) += strncpy_from_user.o
254 obj-$(CONFIG_GENERIC_STRNLEN_USER) += strnlen_user.o
256 obj-$(CONFIG_GENERIC_NET_UTILS) += net_utils.o
258 obj-$(CONFIG_SG_SPLIT) += sg_split.o
259 obj-$(CONFIG_SG_POOL) += sg_pool.o
260 obj-$(CONFIG_MEMREGION) += memregion.o
261 obj-$(CONFIG_STMP_DEVICE) += stmp_device.o
262 obj-$(CONFIG_IRQ_POLL) += irq_poll.o
264 # stackdepot.c should not be instrumented or call instrumented functions.
265 # Prevent the compiler from calling builtins like memcmp() or bcmp() from this
267 CFLAGS_stackdepot.o += -fno-builtin
268 obj-$(CONFIG_STACKDEPOT) += stackdepot.o
269 KASAN_SANITIZE_stackdepot.o := n
270 KCOV_INSTRUMENT_stackdepot.o := n
272 libfdt_files = fdt.o fdt_ro.o fdt_wip.o fdt_rw.o fdt_sw.o fdt_strerror.o \
273 fdt_empty_tree.o fdt_addresses.o
274 $(foreach file, $(libfdt_files), \
275 $(eval CFLAGS_$(file) = -I $(srctree)/scripts/dtc/libfdt))
276 lib-$(CONFIG_LIBFDT) += $(libfdt_files)
278 lib-$(CONFIG_BOOT_CONFIG) += bootconfig.o
280 obj-$(CONFIG_RBTREE_TEST) += rbtree_test.o
281 obj-$(CONFIG_INTERVAL_TREE_TEST) += interval_tree_test.o
283 obj-$(CONFIG_PERCPU_TEST) += percpu_test.o
285 obj-$(CONFIG_ASN1) += asn1_decoder.o
286 obj-$(CONFIG_ASN1_ENCODER) += asn1_encoder.o
288 obj-$(CONFIG_FONT_SUPPORT) += fonts/
290 hostprogs := gen_crc32table
291 hostprogs += gen_crc64table
292 clean-files := crc32table.h
293 clean-files += crc64table.h
295 $(obj)/crc32.o: $(obj)/crc32table.h
297 quiet_cmd_crc32 = GEN $@
300 $(obj)/crc32table.h: $(obj)/gen_crc32table
303 $(obj)/crc64.o: $(obj)/crc64table.h
305 quiet_cmd_crc64 = GEN $@
308 $(obj)/crc64table.h: $(obj)/gen_crc64table
312 # Build a fast OID lookip registry from include/linux/oid_registry.h
314 obj-$(CONFIG_OID_REGISTRY) += oid_registry.o
316 $(obj)/oid_registry.o: $(obj)/oid_registry_data.c
318 $(obj)/oid_registry_data.c: $(srctree)/include/linux/oid_registry.h \
319 $(src)/build_OID_registry
320 $(call cmd,build_OID_registry)
322 quiet_cmd_build_OID_registry = GEN $@
323 cmd_build_OID_registry = perl $(srctree)/$(src)/build_OID_registry $< $@
325 clean-files += oid_registry_data.c
327 obj-$(CONFIG_UCS2_STRING) += ucs2_string.o
328 ifneq ($(CONFIG_UBSAN_TRAP),y)
329 obj-$(CONFIG_UBSAN) += ubsan.o
332 UBSAN_SANITIZE_ubsan.o := n
333 KASAN_SANITIZE_ubsan.o := n
334 KCSAN_SANITIZE_ubsan.o := n
335 CFLAGS_ubsan.o := -fno-stack-protector $(DISABLE_STACKLEAK_PLUGIN)
337 obj-$(CONFIG_SBITMAP) += sbitmap.o
339 obj-$(CONFIG_PARMAN) += parman.o
341 # GCC library routines
342 obj-$(CONFIG_GENERIC_LIB_ASHLDI3) += ashldi3.o
343 obj-$(CONFIG_GENERIC_LIB_ASHRDI3) += ashrdi3.o
344 obj-$(CONFIG_GENERIC_LIB_LSHRDI3) += lshrdi3.o
345 obj-$(CONFIG_GENERIC_LIB_MULDI3) += muldi3.o
346 obj-$(CONFIG_GENERIC_LIB_CMPDI2) += cmpdi2.o
347 obj-$(CONFIG_GENERIC_LIB_UCMPDI2) += ucmpdi2.o
348 obj-$(CONFIG_OBJAGG) += objagg.o
351 obj-$(CONFIG_PLDMFW) += pldmfw/
354 CFLAGS_bitfield_kunit.o := $(DISABLE_STRUCTLEAK_PLUGIN)
355 obj-$(CONFIG_BITFIELD_KUNIT) += bitfield_kunit.o
356 obj-$(CONFIG_LIST_KUNIT_TEST) += list-test.o
357 obj-$(CONFIG_LINEAR_RANGES_TEST) += test_linear_ranges.o
358 obj-$(CONFIG_BITS_TEST) += test_bits.o
359 obj-$(CONFIG_CMDLINE_KUNIT_TEST) += cmdline_kunit.o
360 obj-$(CONFIG_SLUB_KUNIT_TEST) += slub_kunit.o
362 obj-$(CONFIG_GENERIC_LIB_DEVMEM_IS_ALLOWED) += devmem_is_allowed.o