1# SPDX-License-Identifier: GPL-2.0 2# 3# Makefile for some libs needed in the kernel. 4# 5 6ccflags-remove-$(CONFIG_FUNCTION_TRACER) += $(CC_FLAGS_FTRACE) 7 8# These files are disabled because they produce lots of non-interesting and/or 9# flaky coverage that is not a function of syscall inputs. For example, 10# rbtree can be global and individual rotations don't correlate with inputs. 11KCOV_INSTRUMENT_string.o := n 12KCOV_INSTRUMENT_rbtree.o := n 13KCOV_INSTRUMENT_list_debug.o := n 14KCOV_INSTRUMENT_debugobjects.o := n 15KCOV_INSTRUMENT_dynamic_debug.o := n 16KCOV_INSTRUMENT_fault-inject.o := n 17 18# string.o implements standard library functions like memset/memcpy etc. 19# Use -ffreestanding to ensure that the compiler does not try to "optimize" 20# them into calls to themselves. 21CFLAGS_string.o := -ffreestanding 22 23# Early boot use of cmdline, don't instrument it 24ifdef CONFIG_AMD_MEM_ENCRYPT 25KASAN_SANITIZE_string.o := n 26 27CFLAGS_string.o += -fno-stack-protector 28endif 29 30lib-y := ctype.o string.o vsprintf.o cmdline.o \ 31 rbtree.o radix-tree.o timerqueue.o xarray.o \ 32 idr.o extable.o irq_regs.o argv_split.o \ 33 flex_proportions.o ratelimit.o show_mem.o \ 34 is_single_threaded.o plist.o decompress.o kobject_uevent.o \ 35 earlycpio.o seq_buf.o siphash.o dec_and_lock.o \ 36 nmi_backtrace.o win_minmax.o memcat_p.o \ 37 buildid.o 38 39lib-$(CONFIG_PRINTK) += dump_stack.o 40lib-$(CONFIG_SMP) += cpumask.o 41 42lib-y += kobject.o klist.o 43obj-y += lockref.o 44 45obj-y += bcd.o sort.o parser.o debug_locks.o random32.o \ 46 bust_spinlocks.o kasprintf.o bitmap.o scatterlist.o \ 47 list_sort.o uuid.o iov_iter.o clz_ctz.o \ 48 bsearch.o find_bit.o llist.o memweight.o kfifo.o \ 49 percpu-refcount.o rhashtable.o base64.o \ 50 once.o refcount.o usercopy.o errseq.o bucket_locks.o \ 51 generic-radix-tree.o 52obj-$(CONFIG_STRING_SELFTEST) += test_string.o 53obj-y += string_helpers.o 54obj-$(CONFIG_TEST_STRING_HELPERS) += test-string_helpers.o 55obj-y += hexdump.o 56obj-$(CONFIG_TEST_HEXDUMP) += test_hexdump.o 57obj-y += kstrtox.o 58obj-$(CONFIG_FIND_BIT_BENCHMARK) += find_bit_benchmark.o 59obj-$(CONFIG_TEST_BPF) += test_bpf.o 60obj-$(CONFIG_TEST_FIRMWARE) += test_firmware.o 61obj-$(CONFIG_TEST_BITOPS) += test_bitops.o 62CFLAGS_test_bitops.o += -Werror 63obj-$(CONFIG_CPUMASK_KUNIT_TEST) += cpumask_kunit.o 64obj-$(CONFIG_TEST_SYSCTL) += test_sysctl.o 65obj-$(CONFIG_TEST_SIPHASH) += test_siphash.o 66obj-$(CONFIG_HASH_KUNIT_TEST) += test_hash.o 67obj-$(CONFIG_TEST_IDA) += test_ida.o 68obj-$(CONFIG_KASAN_KUNIT_TEST) += test_kasan.o 69CFLAGS_test_kasan.o += -fno-builtin 70CFLAGS_test_kasan.o += $(call cc-disable-warning, vla) 71obj-$(CONFIG_KASAN_MODULE_TEST) += test_kasan_module.o 72CFLAGS_test_kasan_module.o += -fno-builtin 73obj-$(CONFIG_TEST_UBSAN) += test_ubsan.o 74CFLAGS_test_ubsan.o += $(call cc-disable-warning, vla) 75UBSAN_SANITIZE_test_ubsan.o := y 76obj-$(CONFIG_TEST_KSTRTOX) += test-kstrtox.o 77obj-$(CONFIG_TEST_LIST_SORT) += test_list_sort.o 78obj-$(CONFIG_TEST_MIN_HEAP) += test_min_heap.o 79obj-$(CONFIG_TEST_LKM) += test_module.o 80obj-$(CONFIG_TEST_VMALLOC) += test_vmalloc.o 81obj-$(CONFIG_TEST_RHASHTABLE) += test_rhashtable.o 82obj-$(CONFIG_TEST_SORT) += test_sort.o 83obj-$(CONFIG_TEST_USER_COPY) += test_user_copy.o 84obj-$(CONFIG_TEST_STATIC_KEYS) += test_static_keys.o 85obj-$(CONFIG_TEST_STATIC_KEYS) += test_static_key_base.o 86obj-$(CONFIG_TEST_PRINTF) += test_printf.o 87obj-$(CONFIG_TEST_SCANF) += test_scanf.o 88obj-$(CONFIG_TEST_BITMAP) += test_bitmap.o 89obj-$(CONFIG_TEST_STRSCPY) += test_strscpy.o 90obj-$(CONFIG_TEST_UUID) += test_uuid.o 91obj-$(CONFIG_TEST_XARRAY) += test_xarray.o 92obj-$(CONFIG_TEST_PARMAN) += test_parman.o 93obj-$(CONFIG_TEST_KMOD) += test_kmod.o 94obj-$(CONFIG_TEST_DEBUG_VIRTUAL) += test_debug_virtual.o 95obj-$(CONFIG_TEST_MEMCAT_P) += test_memcat_p.o 96obj-$(CONFIG_TEST_OBJAGG) += test_objagg.o 97obj-$(CONFIG_TEST_BLACKHOLE_DEV) += test_blackhole_dev.o 98obj-$(CONFIG_TEST_MEMINIT) += test_meminit.o 99obj-$(CONFIG_TEST_LOCKUP) += test_lockup.o 100obj-$(CONFIG_TEST_HMM) += test_hmm.o 101obj-$(CONFIG_TEST_FREE_PAGES) += test_free_pages.o 102obj-$(CONFIG_KPROBES_SANITY_TEST) += test_kprobes.o 103obj-$(CONFIG_TEST_REF_TRACKER) += test_ref_tracker.o 104CFLAGS_test_fprobe.o += $(CC_FLAGS_FTRACE) 105obj-$(CONFIG_FPROBE_SANITY_TEST) += test_fprobe.o 106# 107# CFLAGS for compiling floating point code inside the kernel. x86/Makefile turns 108# off the generation of FPU/SSE* instructions for kernel proper but FPU_FLAGS 109# get appended last to CFLAGS and thus override those previous compiler options. 110# 111FPU_CFLAGS := -msse -msse2 112ifdef CONFIG_CC_IS_GCC 113# Stack alignment mismatch, proceed with caution. 114# GCC < 7.1 cannot compile code using `double` and -mpreferred-stack-boundary=3 115# (8B stack alignment). 116# See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53383 117# 118# The "-msse" in the first argument is there so that the 119# -mpreferred-stack-boundary=3 build error: 120# 121# -mpreferred-stack-boundary=3 is not between 4 and 12 122# 123# can be triggered. Otherwise gcc doesn't complain. 124FPU_CFLAGS += -mhard-float 125FPU_CFLAGS += $(call cc-option,-msse -mpreferred-stack-boundary=3,-mpreferred-stack-boundary=4) 126endif 127 128obj-$(CONFIG_TEST_FPU) += test_fpu.o 129CFLAGS_test_fpu.o += $(FPU_CFLAGS) 130 131obj-$(CONFIG_TEST_LIVEPATCH) += livepatch/ 132 133obj-$(CONFIG_KUNIT) += kunit/ 134 135ifeq ($(CONFIG_DEBUG_KOBJECT),y) 136CFLAGS_kobject.o += -DDEBUG 137CFLAGS_kobject_uevent.o += -DDEBUG 138endif 139 140obj-$(CONFIG_DEBUG_INFO_REDUCED) += debug_info.o 141CFLAGS_debug_info.o += $(call cc-option, -femit-struct-debug-detailed=any) 142 143obj-y += math/ crypto/ 144 145obj-$(CONFIG_GENERIC_IOMAP) += iomap.o 146obj-$(CONFIG_GENERIC_PCI_IOMAP) += pci_iomap.o 147obj-$(CONFIG_HAS_IOMEM) += iomap_copy.o devres.o 148obj-$(CONFIG_CHECK_SIGNATURE) += check_signature.o 149obj-$(CONFIG_DEBUG_LOCKING_API_SELFTESTS) += locking-selftest.o 150 151lib-y += logic_pio.o 152 153lib-$(CONFIG_INDIRECT_IOMEM) += logic_iomem.o 154 155obj-$(CONFIG_TRACE_MMIO_ACCESS) += trace_readwrite.o 156 157obj-$(CONFIG_GENERIC_HWEIGHT) += hweight.o 158 159obj-$(CONFIG_BTREE) += btree.o 160obj-$(CONFIG_INTERVAL_TREE) += interval_tree.o 161obj-$(CONFIG_ASSOCIATIVE_ARRAY) += assoc_array.o 162obj-$(CONFIG_DEBUG_PREEMPT) += smp_processor_id.o 163obj-$(CONFIG_DEBUG_LIST) += list_debug.o 164obj-$(CONFIG_DEBUG_OBJECTS) += debugobjects.o 165 166obj-$(CONFIG_BITREVERSE) += bitrev.o 167obj-$(CONFIG_LINEAR_RANGES) += linear_ranges.o 168obj-$(CONFIG_PACKING) += packing.o 169obj-$(CONFIG_CRC_CCITT) += crc-ccitt.o 170obj-$(CONFIG_CRC16) += crc16.o 171obj-$(CONFIG_CRC_T10DIF)+= crc-t10dif.o 172obj-$(CONFIG_CRC_ITU_T) += crc-itu-t.o 173obj-$(CONFIG_CRC32) += crc32.o 174obj-$(CONFIG_CRC64) += crc64.o 175obj-$(CONFIG_CRC32_SELFTEST) += crc32test.o 176obj-$(CONFIG_CRC4) += crc4.o 177obj-$(CONFIG_CRC7) += crc7.o 178obj-$(CONFIG_LIBCRC32C) += libcrc32c.o 179obj-$(CONFIG_CRC8) += crc8.o 180obj-$(CONFIG_CRC64_ROCKSOFT) += crc64-rocksoft.o 181obj-$(CONFIG_XXHASH) += xxhash.o 182obj-$(CONFIG_GENERIC_ALLOCATOR) += genalloc.o 183 184obj-$(CONFIG_842_COMPRESS) += 842/ 185obj-$(CONFIG_842_DECOMPRESS) += 842/ 186obj-$(CONFIG_ZLIB_INFLATE) += zlib_inflate/ 187obj-$(CONFIG_ZLIB_DEFLATE) += zlib_deflate/ 188obj-$(CONFIG_ZLIB_DFLTCC) += zlib_dfltcc/ 189obj-$(CONFIG_REED_SOLOMON) += reed_solomon/ 190obj-$(CONFIG_BCH) += bch.o 191obj-$(CONFIG_LZO_COMPRESS) += lzo/ 192obj-$(CONFIG_LZO_DECOMPRESS) += lzo/ 193obj-$(CONFIG_LZ4_COMPRESS) += lz4/ 194obj-$(CONFIG_LZ4HC_COMPRESS) += lz4/ 195obj-$(CONFIG_LZ4_DECOMPRESS) += lz4/ 196obj-$(CONFIG_ZSTD_COMPRESS) += zstd/ 197obj-$(CONFIG_ZSTD_DECOMPRESS) += zstd/ 198obj-$(CONFIG_XZ_DEC) += xz/ 199obj-$(CONFIG_RAID6_PQ) += raid6/ 200 201lib-$(CONFIG_DECOMPRESS_GZIP) += decompress_inflate.o 202lib-$(CONFIG_DECOMPRESS_BZIP2) += decompress_bunzip2.o 203lib-$(CONFIG_DECOMPRESS_LZMA) += decompress_unlzma.o 204lib-$(CONFIG_DECOMPRESS_XZ) += decompress_unxz.o 205lib-$(CONFIG_DECOMPRESS_LZO) += decompress_unlzo.o 206lib-$(CONFIG_DECOMPRESS_LZ4) += decompress_unlz4.o 207lib-$(CONFIG_DECOMPRESS_ZSTD) += decompress_unzstd.o 208 209obj-$(CONFIG_TEXTSEARCH) += textsearch.o 210obj-$(CONFIG_TEXTSEARCH_KMP) += ts_kmp.o 211obj-$(CONFIG_TEXTSEARCH_BM) += ts_bm.o 212obj-$(CONFIG_TEXTSEARCH_FSM) += ts_fsm.o 213obj-$(CONFIG_SMP) += percpu_counter.o 214obj-$(CONFIG_AUDIT_GENERIC) += audit.o 215obj-$(CONFIG_AUDIT_COMPAT_GENERIC) += compat_audit.o 216 217obj-$(CONFIG_IOMMU_HELPER) += iommu-helper.o 218obj-$(CONFIG_FAULT_INJECTION) += fault-inject.o 219obj-$(CONFIG_FAULT_INJECTION_USERCOPY) += fault-inject-usercopy.o 220obj-$(CONFIG_NOTIFIER_ERROR_INJECTION) += notifier-error-inject.o 221obj-$(CONFIG_PM_NOTIFIER_ERROR_INJECT) += pm-notifier-error-inject.o 222obj-$(CONFIG_NETDEV_NOTIFIER_ERROR_INJECT) += netdev-notifier-error-inject.o 223obj-$(CONFIG_MEMORY_NOTIFIER_ERROR_INJECT) += memory-notifier-error-inject.o 224obj-$(CONFIG_OF_RECONFIG_NOTIFIER_ERROR_INJECT) += \ 225 of-reconfig-notifier-error-inject.o 226obj-$(CONFIG_FUNCTION_ERROR_INJECTION) += error-inject.o 227 228lib-$(CONFIG_GENERIC_BUG) += bug.o 229 230obj-$(CONFIG_HAVE_ARCH_TRACEHOOK) += syscall.o 231 232obj-$(CONFIG_DYNAMIC_DEBUG_CORE) += dynamic_debug.o 233obj-$(CONFIG_SYMBOLIC_ERRNAME) += errname.o 234 235obj-$(CONFIG_NLATTR) += nlattr.o 236 237obj-$(CONFIG_LRU_CACHE) += lru_cache.o 238 239obj-$(CONFIG_GENERIC_CSUM) += checksum.o 240 241obj-$(CONFIG_GENERIC_ATOMIC64) += atomic64.o 242 243obj-$(CONFIG_ATOMIC64_SELFTEST) += atomic64_test.o 244 245obj-$(CONFIG_CPU_RMAP) += cpu_rmap.o 246 247obj-$(CONFIG_DQL) += dynamic_queue_limits.o 248 249obj-$(CONFIG_GLOB) += glob.o 250obj-$(CONFIG_GLOB_SELFTEST) += globtest.o 251 252obj-$(CONFIG_MPILIB) += mpi/ 253obj-$(CONFIG_DIMLIB) += dim/ 254obj-$(CONFIG_SIGNATURE) += digsig.o 255 256lib-$(CONFIG_CLZ_TAB) += clz_tab.o 257lib-$(CONFIG_LIB_MEMNEQ) += memneq.o 258 259obj-$(CONFIG_GENERIC_STRNCPY_FROM_USER) += strncpy_from_user.o 260obj-$(CONFIG_GENERIC_STRNLEN_USER) += strnlen_user.o 261 262obj-$(CONFIG_GENERIC_NET_UTILS) += net_utils.o 263 264obj-$(CONFIG_SG_SPLIT) += sg_split.o 265obj-$(CONFIG_SG_POOL) += sg_pool.o 266obj-$(CONFIG_MEMREGION) += memregion.o 267obj-$(CONFIG_STMP_DEVICE) += stmp_device.o 268obj-$(CONFIG_IRQ_POLL) += irq_poll.o 269 270obj-$(CONFIG_POLYNOMIAL) += polynomial.o 271 272# stackdepot.c should not be instrumented or call instrumented functions. 273# Prevent the compiler from calling builtins like memcmp() or bcmp() from this 274# file. 275CFLAGS_stackdepot.o += -fno-builtin 276obj-$(CONFIG_STACKDEPOT) += stackdepot.o 277KASAN_SANITIZE_stackdepot.o := n 278KCOV_INSTRUMENT_stackdepot.o := n 279 280obj-$(CONFIG_REF_TRACKER) += ref_tracker.o 281 282libfdt_files = fdt.o fdt_ro.o fdt_wip.o fdt_rw.o fdt_sw.o fdt_strerror.o \ 283 fdt_empty_tree.o fdt_addresses.o 284$(foreach file, $(libfdt_files), \ 285 $(eval CFLAGS_$(file) = -I $(srctree)/scripts/dtc/libfdt)) 286lib-$(CONFIG_LIBFDT) += $(libfdt_files) 287 288obj-$(CONFIG_BOOT_CONFIG) += bootconfig.o 289obj-$(CONFIG_BOOT_CONFIG_EMBED) += bootconfig-data.o 290 291$(obj)/bootconfig-data.o: $(obj)/default.bconf 292 293targets += default.bconf 294filechk_defbconf = cat $(or $(real-prereqs), /dev/null) 295$(obj)/default.bconf: $(CONFIG_BOOT_CONFIG_EMBED_FILE) FORCE 296 $(call filechk,defbconf) 297 298obj-$(CONFIG_RBTREE_TEST) += rbtree_test.o 299obj-$(CONFIG_INTERVAL_TREE_TEST) += interval_tree_test.o 300 301obj-$(CONFIG_PERCPU_TEST) += percpu_test.o 302 303obj-$(CONFIG_ASN1) += asn1_decoder.o 304obj-$(CONFIG_ASN1_ENCODER) += asn1_encoder.o 305 306obj-$(CONFIG_FONT_SUPPORT) += fonts/ 307 308hostprogs := gen_crc32table 309hostprogs += gen_crc64table 310clean-files := crc32table.h 311clean-files += crc64table.h 312 313$(obj)/crc32.o: $(obj)/crc32table.h 314 315quiet_cmd_crc32 = GEN $@ 316 cmd_crc32 = $< > $@ 317 318$(obj)/crc32table.h: $(obj)/gen_crc32table 319 $(call cmd,crc32) 320 321$(obj)/crc64.o: $(obj)/crc64table.h 322 323quiet_cmd_crc64 = GEN $@ 324 cmd_crc64 = $< > $@ 325 326$(obj)/crc64table.h: $(obj)/gen_crc64table 327 $(call cmd,crc64) 328 329# 330# Build a fast OID lookip registry from include/linux/oid_registry.h 331# 332obj-$(CONFIG_OID_REGISTRY) += oid_registry.o 333 334$(obj)/oid_registry.o: $(obj)/oid_registry_data.c 335 336$(obj)/oid_registry_data.c: $(srctree)/include/linux/oid_registry.h \ 337 $(src)/build_OID_registry 338 $(call cmd,build_OID_registry) 339 340quiet_cmd_build_OID_registry = GEN $@ 341 cmd_build_OID_registry = perl $(srctree)/$(src)/build_OID_registry $< $@ 342 343clean-files += oid_registry_data.c 344 345obj-$(CONFIG_UCS2_STRING) += ucs2_string.o 346ifneq ($(CONFIG_UBSAN_TRAP),y) 347obj-$(CONFIG_UBSAN) += ubsan.o 348endif 349 350UBSAN_SANITIZE_ubsan.o := n 351KASAN_SANITIZE_ubsan.o := n 352KCSAN_SANITIZE_ubsan.o := n 353CFLAGS_ubsan.o := -fno-stack-protector $(DISABLE_STACKLEAK_PLUGIN) 354 355obj-$(CONFIG_SBITMAP) += sbitmap.o 356 357obj-$(CONFIG_PARMAN) += parman.o 358 359# GCC library routines 360obj-$(CONFIG_GENERIC_LIB_ASHLDI3) += ashldi3.o 361obj-$(CONFIG_GENERIC_LIB_ASHRDI3) += ashrdi3.o 362obj-$(CONFIG_GENERIC_LIB_LSHRDI3) += lshrdi3.o 363obj-$(CONFIG_GENERIC_LIB_MULDI3) += muldi3.o 364obj-$(CONFIG_GENERIC_LIB_CMPDI2) += cmpdi2.o 365obj-$(CONFIG_GENERIC_LIB_UCMPDI2) += ucmpdi2.o 366obj-$(CONFIG_OBJAGG) += objagg.o 367 368# pldmfw library 369obj-$(CONFIG_PLDMFW) += pldmfw/ 370 371# KUnit tests 372CFLAGS_bitfield_kunit.o := $(DISABLE_STRUCTLEAK_PLUGIN) 373obj-$(CONFIG_BITFIELD_KUNIT) += bitfield_kunit.o 374obj-$(CONFIG_LIST_KUNIT_TEST) += list-test.o 375obj-$(CONFIG_LINEAR_RANGES_TEST) += test_linear_ranges.o 376obj-$(CONFIG_BITS_TEST) += test_bits.o 377obj-$(CONFIG_CMDLINE_KUNIT_TEST) += cmdline_kunit.o 378obj-$(CONFIG_SLUB_KUNIT_TEST) += slub_kunit.o 379obj-$(CONFIG_MEMCPY_KUNIT_TEST) += memcpy_kunit.o 380obj-$(CONFIG_IS_SIGNED_TYPE_KUNIT_TEST) += is_signed_type_kunit.o 381obj-$(CONFIG_OVERFLOW_KUNIT_TEST) += overflow_kunit.o 382CFLAGS_stackinit_kunit.o += $(call cc-disable-warning, switch-unreachable) 383obj-$(CONFIG_STACKINIT_KUNIT_TEST) += stackinit_kunit.o 384obj-$(CONFIG_FORTIFY_KUNIT_TEST) += fortify_kunit.o 385 386obj-$(CONFIG_GENERIC_LIB_DEVMEM_IS_ALLOWED) += devmem_is_allowed.o 387 388# FORTIFY_SOURCE compile-time behavior tests 389TEST_FORTIFY_SRCS = $(wildcard $(srctree)/$(src)/test_fortify/*-*.c) 390TEST_FORTIFY_LOGS = $(patsubst $(srctree)/$(src)/%.c, %.log, $(TEST_FORTIFY_SRCS)) 391TEST_FORTIFY_LOG = test_fortify.log 392 393quiet_cmd_test_fortify = TEST $@ 394 cmd_test_fortify = $(CONFIG_SHELL) $(srctree)/scripts/test_fortify.sh \ 395 $< $@ "$(NM)" $(CC) $(c_flags) \ 396 $(call cc-disable-warning,fortify-source) \ 397 -DKBUILD_EXTRA_WARN1 398 399targets += $(TEST_FORTIFY_LOGS) 400clean-files += $(TEST_FORTIFY_LOGS) 401clean-files += $(addsuffix .o, $(TEST_FORTIFY_LOGS)) 402$(obj)/test_fortify/%.log: $(src)/test_fortify/%.c \ 403 $(src)/test_fortify/test_fortify.h \ 404 $(srctree)/include/linux/fortify-string.h \ 405 $(srctree)/scripts/test_fortify.sh \ 406 FORCE 407 $(call if_changed,test_fortify) 408 409quiet_cmd_gen_fortify_log = GEN $@ 410 cmd_gen_fortify_log = cat </dev/null $(filter-out FORCE,$^) 2>/dev/null > $@ || true 411 412targets += $(TEST_FORTIFY_LOG) 413clean-files += $(TEST_FORTIFY_LOG) 414$(obj)/$(TEST_FORTIFY_LOG): $(addprefix $(obj)/, $(TEST_FORTIFY_LOGS)) FORCE 415 $(call if_changed,gen_fortify_log) 416 417# Fake dependency to trigger the fortify tests. 418ifeq ($(CONFIG_FORTIFY_SOURCE),y) 419$(obj)/string.o: $(obj)/$(TEST_FORTIFY_LOG) 420endif 421