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1# SPDX-License-Identifier: GPL-2.0
2#
3# Makefile for some libs needed in the kernel.
4#
5
6ccflags-remove-$(CONFIG_FUNCTION_TRACER) += $(CC_FLAGS_FTRACE)
7
8# These files are disabled because they produce lots of non-interesting and/or
9# flaky coverage that is not a function of syscall inputs. For example,
10# rbtree can be global and individual rotations don't correlate with inputs.
11KCOV_INSTRUMENT_string.o := n
12KCOV_INSTRUMENT_rbtree.o := n
13KCOV_INSTRUMENT_list_debug.o := n
14KCOV_INSTRUMENT_debugobjects.o := n
15KCOV_INSTRUMENT_dynamic_debug.o := n
16KCOV_INSTRUMENT_fault-inject.o := n
17
18# string.o implements standard library functions like memset/memcpy etc.
19# Use -ffreestanding to ensure that the compiler does not try to "optimize"
20# them into calls to themselves.
21CFLAGS_string.o := -ffreestanding
22
23# Early boot use of cmdline, don't instrument it
24ifdef CONFIG_AMD_MEM_ENCRYPT
25KASAN_SANITIZE_string.o := n
26
27CFLAGS_string.o += -fno-stack-protector
28endif
29
30lib-y := ctype.o string.o vsprintf.o cmdline.o \
31	 rbtree.o radix-tree.o timerqueue.o xarray.o \
32	 idr.o extable.o sha1.o irq_regs.o argv_split.o \
33	 flex_proportions.o ratelimit.o show_mem.o \
34	 is_single_threaded.o plist.o decompress.o kobject_uevent.o \
35	 earlycpio.o seq_buf.o siphash.o dec_and_lock.o \
36	 nmi_backtrace.o nodemask.o win_minmax.o memcat_p.o \
37	 buildid.o
38
39lib-$(CONFIG_PRINTK) += dump_stack.o
40lib-$(CONFIG_SMP) += cpumask.o
41
42lib-y	+= kobject.o klist.o
43obj-y	+= lockref.o
44
45obj-y += bcd.o sort.o parser.o debug_locks.o random32.o \
46	 bust_spinlocks.o kasprintf.o bitmap.o scatterlist.o \
47	 list_sort.o uuid.o iov_iter.o clz_ctz.o \
48	 bsearch.o find_bit.o llist.o memweight.o kfifo.o \
49	 percpu-refcount.o rhashtable.o \
50	 once.o refcount.o usercopy.o errseq.o bucket_locks.o \
51	 generic-radix-tree.o
52obj-$(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-$(CONFIG_TEST_SYSCTL) += test_sysctl.o
64obj-$(CONFIG_TEST_HASH) += test_hash.o test_siphash.o
65obj-$(CONFIG_TEST_IDA) += test_ida.o
66obj-$(CONFIG_KASAN_KUNIT_TEST) += test_kasan.o
67CFLAGS_test_kasan.o += -fno-builtin
68CFLAGS_test_kasan.o += $(call cc-disable-warning, vla)
69obj-$(CONFIG_KASAN_MODULE_TEST) += test_kasan_module.o
70CFLAGS_test_kasan_module.o += -fno-builtin
71obj-$(CONFIG_TEST_UBSAN) += test_ubsan.o
72CFLAGS_test_ubsan.o += $(call cc-disable-warning, vla)
73UBSAN_SANITIZE_test_ubsan.o := y
74obj-$(CONFIG_TEST_KSTRTOX) += test-kstrtox.o
75obj-$(CONFIG_TEST_LIST_SORT) += test_list_sort.o
76obj-$(CONFIG_TEST_MIN_HEAP) += test_min_heap.o
77obj-$(CONFIG_TEST_LKM) += test_module.o
78obj-$(CONFIG_TEST_VMALLOC) += test_vmalloc.o
79obj-$(CONFIG_TEST_OVERFLOW) += test_overflow.o
80obj-$(CONFIG_TEST_RHASHTABLE) += test_rhashtable.o
81obj-$(CONFIG_TEST_SORT) += test_sort.o
82obj-$(CONFIG_TEST_USER_COPY) += test_user_copy.o
83obj-$(CONFIG_TEST_STATIC_KEYS) += test_static_keys.o
84obj-$(CONFIG_TEST_STATIC_KEYS) += test_static_key_base.o
85obj-$(CONFIG_TEST_PRINTF) += test_printf.o
86obj-$(CONFIG_TEST_SCANF) += test_scanf.o
87obj-$(CONFIG_TEST_BITMAP) += test_bitmap.o
88obj-$(CONFIG_TEST_STRSCPY) += test_strscpy.o
89obj-$(CONFIG_TEST_UUID) += test_uuid.o
90obj-$(CONFIG_TEST_XARRAY) += test_xarray.o
91obj-$(CONFIG_TEST_PARMAN) += test_parman.o
92obj-$(CONFIG_TEST_KMOD) += test_kmod.o
93obj-$(CONFIG_TEST_DEBUG_VIRTUAL) += test_debug_virtual.o
94obj-$(CONFIG_TEST_MEMCAT_P) += test_memcat_p.o
95obj-$(CONFIG_TEST_OBJAGG) += test_objagg.o
96CFLAGS_test_stackinit.o += $(call cc-disable-warning, switch-unreachable)
97obj-$(CONFIG_TEST_STACKINIT) += test_stackinit.o
98obj-$(CONFIG_TEST_BLACKHOLE_DEV) += test_blackhole_dev.o
99obj-$(CONFIG_TEST_MEMINIT) += test_meminit.o
100obj-$(CONFIG_TEST_LOCKUP) += test_lockup.o
101obj-$(CONFIG_TEST_HMM) += test_hmm.o
102obj-$(CONFIG_TEST_FREE_PAGES) += test_free_pages.o
103
104#
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.
108#
109FPU_CFLAGS := -msse -msse2
110ifdef 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
115#
116# The "-msse" in the first argument is there so that the
117# -mpreferred-stack-boundary=3 build error:
118#
119#  -mpreferred-stack-boundary=3 is not between 4 and 12
120#
121# can be triggered. Otherwise gcc doesn't complain.
122FPU_CFLAGS += -mhard-float
123FPU_CFLAGS += $(call cc-option,-msse -mpreferred-stack-boundary=3,-mpreferred-stack-boundary=4)
124endif
125
126obj-$(CONFIG_TEST_FPU) += test_fpu.o
127CFLAGS_test_fpu.o += $(FPU_CFLAGS)
128
129obj-$(CONFIG_TEST_LIVEPATCH) += livepatch/
130
131obj-$(CONFIG_KUNIT) += kunit/
132
133ifeq ($(CONFIG_DEBUG_KOBJECT),y)
134CFLAGS_kobject.o += -DDEBUG
135CFLAGS_kobject_uevent.o += -DDEBUG
136endif
137
138obj-$(CONFIG_DEBUG_INFO_REDUCED) += debug_info.o
139CFLAGS_debug_info.o += $(call cc-option, -femit-struct-debug-detailed=any)
140
141obj-y += math/ crypto/
142
143obj-$(CONFIG_GENERIC_IOMAP) += iomap.o
144obj-$(CONFIG_GENERIC_PCI_IOMAP) += pci_iomap.o
145obj-$(CONFIG_HAS_IOMEM) += iomap_copy.o devres.o
146obj-$(CONFIG_CHECK_SIGNATURE) += check_signature.o
147obj-$(CONFIG_DEBUG_LOCKING_API_SELFTESTS) += locking-selftest.o
148
149lib-y += logic_pio.o
150
151lib-$(CONFIG_INDIRECT_IOMEM) += logic_iomem.o
152
153obj-$(CONFIG_TRACE_MMIO_ACCESS) += trace_readwrite.o
154
155obj-$(CONFIG_GENERIC_HWEIGHT) += hweight.o
156
157obj-$(CONFIG_BTREE) += btree.o
158obj-$(CONFIG_INTERVAL_TREE) += interval_tree.o
159obj-$(CONFIG_ASSOCIATIVE_ARRAY) += assoc_array.o
160obj-$(CONFIG_DEBUG_PREEMPT) += smp_processor_id.o
161obj-$(CONFIG_DEBUG_LIST) += list_debug.o
162obj-$(CONFIG_DEBUG_OBJECTS) += debugobjects.o
163
164obj-$(CONFIG_BITREVERSE) += bitrev.o
165obj-$(CONFIG_LINEAR_RANGES) += linear_ranges.o
166obj-$(CONFIG_PACKING)	+= packing.o
167obj-$(CONFIG_CRC_CCITT)	+= crc-ccitt.o
168obj-$(CONFIG_CRC16)	+= crc16.o
169obj-$(CONFIG_CRC_T10DIF)+= crc-t10dif.o
170obj-$(CONFIG_CRC_ITU_T)	+= crc-itu-t.o
171obj-$(CONFIG_CRC32)	+= crc32.o
172obj-$(CONFIG_CRC64)     += crc64.o
173obj-$(CONFIG_CRC32_SELFTEST)	+= crc32test.o
174obj-$(CONFIG_CRC4)	+= crc4.o
175obj-$(CONFIG_CRC7)	+= crc7.o
176obj-$(CONFIG_LIBCRC32C)	+= libcrc32c.o
177obj-$(CONFIG_CRC8)	+= crc8.o
178obj-$(CONFIG_XXHASH)	+= xxhash.o
179obj-$(CONFIG_GENERIC_ALLOCATOR) += genalloc.o
180
181obj-$(CONFIG_842_COMPRESS) += 842/
182obj-$(CONFIG_842_DECOMPRESS) += 842/
183obj-$(CONFIG_ZLIB_INFLATE) += zlib_inflate/
184obj-$(CONFIG_ZLIB_DEFLATE) += zlib_deflate/
185obj-$(CONFIG_ZLIB_DFLTCC) += zlib_dfltcc/
186obj-$(CONFIG_REED_SOLOMON) += reed_solomon/
187obj-$(CONFIG_BCH) += bch.o
188obj-$(CONFIG_LZO_COMPRESS) += lzo/
189obj-$(CONFIG_LZO_DECOMPRESS) += lzo/
190obj-$(CONFIG_LZ4_COMPRESS) += lz4/
191obj-$(CONFIG_LZ4HC_COMPRESS) += lz4/
192obj-$(CONFIG_LZ4_DECOMPRESS) += lz4/
193obj-$(CONFIG_ZSTD_COMPRESS) += zstd/
194obj-$(CONFIG_ZSTD_DECOMPRESS) += zstd/
195obj-$(CONFIG_XZ_DEC) += xz/
196obj-$(CONFIG_RAID6_PQ) += raid6/
197
198lib-$(CONFIG_DECOMPRESS_GZIP) += decompress_inflate.o
199lib-$(CONFIG_DECOMPRESS_BZIP2) += decompress_bunzip2.o
200lib-$(CONFIG_DECOMPRESS_LZMA) += decompress_unlzma.o
201lib-$(CONFIG_DECOMPRESS_XZ) += decompress_unxz.o
202lib-$(CONFIG_DECOMPRESS_LZO) += decompress_unlzo.o
203lib-$(CONFIG_DECOMPRESS_LZ4) += decompress_unlz4.o
204lib-$(CONFIG_DECOMPRESS_ZSTD) += decompress_unzstd.o
205
206obj-$(CONFIG_TEXTSEARCH) += textsearch.o
207obj-$(CONFIG_TEXTSEARCH_KMP) += ts_kmp.o
208obj-$(CONFIG_TEXTSEARCH_BM) += ts_bm.o
209obj-$(CONFIG_TEXTSEARCH_FSM) += ts_fsm.o
210obj-$(CONFIG_SMP) += percpu_counter.o
211obj-$(CONFIG_AUDIT_GENERIC) += audit.o
212obj-$(CONFIG_AUDIT_COMPAT_GENERIC) += compat_audit.o
213
214obj-$(CONFIG_IOMMU_HELPER) += iommu-helper.o
215obj-$(CONFIG_FAULT_INJECTION) += fault-inject.o
216obj-$(CONFIG_FAULT_INJECTION_USERCOPY) += fault-inject-usercopy.o
217obj-$(CONFIG_NOTIFIER_ERROR_INJECTION) += notifier-error-inject.o
218obj-$(CONFIG_PM_NOTIFIER_ERROR_INJECT) += pm-notifier-error-inject.o
219obj-$(CONFIG_NETDEV_NOTIFIER_ERROR_INJECT) += netdev-notifier-error-inject.o
220obj-$(CONFIG_MEMORY_NOTIFIER_ERROR_INJECT) += memory-notifier-error-inject.o
221obj-$(CONFIG_OF_RECONFIG_NOTIFIER_ERROR_INJECT) += \
222	of-reconfig-notifier-error-inject.o
223obj-$(CONFIG_FUNCTION_ERROR_INJECTION) += error-inject.o
224
225lib-$(CONFIG_GENERIC_BUG) += bug.o
226
227obj-$(CONFIG_HAVE_ARCH_TRACEHOOK) += syscall.o
228
229obj-$(CONFIG_DYNAMIC_DEBUG_CORE) += dynamic_debug.o
230obj-$(CONFIG_SYMBOLIC_ERRNAME) += errname.o
231
232obj-$(CONFIG_NLATTR) += nlattr.o
233
234obj-$(CONFIG_LRU_CACHE) += lru_cache.o
235
236obj-$(CONFIG_GENERIC_CSUM) += checksum.o
237
238obj-$(CONFIG_GENERIC_ATOMIC64) += atomic64.o
239
240obj-$(CONFIG_ATOMIC64_SELFTEST) += atomic64_test.o
241
242obj-$(CONFIG_CPU_RMAP) += cpu_rmap.o
243
244obj-$(CONFIG_DQL) += dynamic_queue_limits.o
245
246obj-$(CONFIG_GLOB) += glob.o
247obj-$(CONFIG_GLOB_SELFTEST) += globtest.o
248
249obj-$(CONFIG_MPILIB) += mpi/
250obj-$(CONFIG_DIMLIB) += dim/
251obj-$(CONFIG_SIGNATURE) += digsig.o
252
253lib-$(CONFIG_CLZ_TAB) += clz_tab.o
254lib-$(CONFIG_LIB_MEMNEQ) += memneq.o
255
256obj-$(CONFIG_GENERIC_STRNCPY_FROM_USER) += strncpy_from_user.o
257obj-$(CONFIG_GENERIC_STRNLEN_USER) += strnlen_user.o
258
259obj-$(CONFIG_GENERIC_NET_UTILS) += net_utils.o
260
261obj-$(CONFIG_SG_SPLIT) += sg_split.o
262obj-$(CONFIG_SG_POOL) += sg_pool.o
263obj-$(CONFIG_MEMREGION) += memregion.o
264obj-$(CONFIG_STMP_DEVICE) += stmp_device.o
265obj-$(CONFIG_IRQ_POLL) += irq_poll.o
266
267# stackdepot.c should not be instrumented or call instrumented functions.
268# Prevent the compiler from calling builtins like memcmp() or bcmp() from this
269# file.
270CFLAGS_stackdepot.o += -fno-builtin
271obj-$(CONFIG_STACKDEPOT) += stackdepot.o
272KASAN_SANITIZE_stackdepot.o := n
273KCOV_INSTRUMENT_stackdepot.o := n
274
275libfdt_files = fdt.o fdt_ro.o fdt_wip.o fdt_rw.o fdt_sw.o fdt_strerror.o \
276	       fdt_empty_tree.o fdt_addresses.o
277$(foreach file, $(libfdt_files), \
278	$(eval CFLAGS_$(file) = -I $(srctree)/scripts/dtc/libfdt))
279lib-$(CONFIG_LIBFDT) += $(libfdt_files)
280
281obj-$(CONFIG_BOOT_CONFIG) += bootconfig.o
282
283obj-$(CONFIG_RBTREE_TEST) += rbtree_test.o
284obj-$(CONFIG_INTERVAL_TREE_TEST) += interval_tree_test.o
285
286obj-$(CONFIG_PERCPU_TEST) += percpu_test.o
287
288obj-$(CONFIG_ASN1) += asn1_decoder.o
289obj-$(CONFIG_ASN1_ENCODER) += asn1_encoder.o
290
291obj-$(CONFIG_FONT_SUPPORT) += fonts/
292
293hostprogs	:= gen_crc32table
294hostprogs	+= gen_crc64table
295clean-files	:= crc32table.h
296clean-files	+= crc64table.h
297
298$(obj)/crc32.o: $(obj)/crc32table.h
299
300quiet_cmd_crc32 = GEN     $@
301      cmd_crc32 = $< > $@
302
303$(obj)/crc32table.h: $(obj)/gen_crc32table
304	$(call cmd,crc32)
305
306$(obj)/crc64.o: $(obj)/crc64table.h
307
308quiet_cmd_crc64 = GEN     $@
309      cmd_crc64 = $< > $@
310
311$(obj)/crc64table.h: $(obj)/gen_crc64table
312	$(call cmd,crc64)
313
314#
315# Build a fast OID lookip registry from include/linux/oid_registry.h
316#
317obj-$(CONFIG_OID_REGISTRY) += oid_registry.o
318
319$(obj)/oid_registry.o: $(obj)/oid_registry_data.c
320
321$(obj)/oid_registry_data.c: $(srctree)/include/linux/oid_registry.h \
322			    $(src)/build_OID_registry
323	$(call cmd,build_OID_registry)
324
325quiet_cmd_build_OID_registry = GEN     $@
326      cmd_build_OID_registry = perl $(srctree)/$(src)/build_OID_registry $< $@
327
328clean-files	+= oid_registry_data.c
329
330obj-$(CONFIG_UCS2_STRING) += ucs2_string.o
331ifneq ($(CONFIG_UBSAN_TRAP),y)
332obj-$(CONFIG_UBSAN) += ubsan.o
333endif
334
335UBSAN_SANITIZE_ubsan.o := n
336KASAN_SANITIZE_ubsan.o := n
337KCSAN_SANITIZE_ubsan.o := n
338CFLAGS_ubsan.o := -fno-stack-protector $(DISABLE_STACKLEAK_PLUGIN)
339
340obj-$(CONFIG_SBITMAP) += sbitmap.o
341
342obj-$(CONFIG_PARMAN) += parman.o
343
344# GCC library routines
345obj-$(CONFIG_GENERIC_LIB_ASHLDI3) += ashldi3.o
346obj-$(CONFIG_GENERIC_LIB_ASHRDI3) += ashrdi3.o
347obj-$(CONFIG_GENERIC_LIB_LSHRDI3) += lshrdi3.o
348obj-$(CONFIG_GENERIC_LIB_MULDI3) += muldi3.o
349obj-$(CONFIG_GENERIC_LIB_CMPDI2) += cmpdi2.o
350obj-$(CONFIG_GENERIC_LIB_UCMPDI2) += ucmpdi2.o
351obj-$(CONFIG_OBJAGG) += objagg.o
352
353# pldmfw library
354obj-$(CONFIG_PLDMFW) += pldmfw/
355
356# KUnit tests
357CFLAGS_bitfield_kunit.o := $(DISABLE_STRUCTLEAK_PLUGIN)
358obj-$(CONFIG_BITFIELD_KUNIT) += bitfield_kunit.o
359obj-$(CONFIG_LIST_KUNIT_TEST) += list-test.o
360obj-$(CONFIG_LINEAR_RANGES_TEST) += test_linear_ranges.o
361obj-$(CONFIG_BITS_TEST) += test_bits.o
362obj-$(CONFIG_CMDLINE_KUNIT_TEST) += cmdline_kunit.o
363obj-$(CONFIG_SLUB_KUNIT_TEST) += slub_kunit.o
364
365obj-$(CONFIG_GENERIC_LIB_DEVMEM_IS_ALLOWED) += devmem_is_allowed.o
366