1# SPDX-License-Identifier: GPL-2.0 2 3# Where to place rustdoc generated documentation 4rustdoc_output := $(objtree)/Documentation/output/rust/rustdoc 5 6obj-$(CONFIG_RUST) += core.o compiler_builtins.o ffi.o 7always-$(CONFIG_RUST) += exports_core_generated.h 8 9# Missing prototypes are expected in the helpers since these are exported 10# for Rust only, thus there is no header nor prototypes. 11obj-$(CONFIG_RUST) += helpers/helpers.o 12CFLAGS_REMOVE_helpers/helpers.o = -Wmissing-prototypes -Wmissing-declarations 13 14always-$(CONFIG_RUST) += bindings/bindings_generated.rs bindings/bindings_helpers_generated.rs 15obj-$(CONFIG_RUST) += bindings.o kernel.o 16always-$(CONFIG_RUST) += exports_helpers_generated.h \ 17 exports_bindings_generated.h exports_kernel_generated.h 18 19always-$(CONFIG_RUST) += uapi/uapi_generated.rs 20obj-$(CONFIG_RUST) += uapi.o 21 22ifdef CONFIG_RUST_BUILD_ASSERT_ALLOW 23obj-$(CONFIG_RUST) += build_error.o 24else 25always-$(CONFIG_RUST) += build_error.o 26endif 27 28obj-$(CONFIG_RUST) += exports.o 29 30always-$(CONFIG_RUST_KERNEL_DOCTESTS) += doctests_kernel_generated.rs 31always-$(CONFIG_RUST_KERNEL_DOCTESTS) += doctests_kernel_generated_kunit.c 32 33obj-$(CONFIG_RUST_KERNEL_DOCTESTS) += doctests_kernel_generated.o 34obj-$(CONFIG_RUST_KERNEL_DOCTESTS) += doctests_kernel_generated_kunit.o 35 36always-$(subst y,$(CONFIG_RUST),$(CONFIG_JUMP_LABEL)) += kernel/generated_arch_static_branch_asm.rs 37 38# Avoids running `$(RUSTC)` when it may not be available. 39ifdef CONFIG_RUST 40 41libmacros_name := $(shell MAKEFLAGS= $(RUSTC) --print file-names --crate-name macros --crate-type proc-macro - </dev/null) 42libmacros_extension := $(patsubst libmacros.%,%,$(libmacros_name)) 43 44always-$(CONFIG_RUST) += $(libmacros_name) 45 46# `$(rust_flags)` is passed in case the user added `--sysroot`. 47rustc_sysroot := $(shell MAKEFLAGS= $(RUSTC) $(rust_flags) --print sysroot) 48rustc_host_target := $(shell $(RUSTC) --version --verbose | grep -F 'host: ' | cut -d' ' -f2) 49RUST_LIB_SRC ?= $(rustc_sysroot)/lib/rustlib/src/rust/library 50 51ifneq ($(quiet),) 52rust_test_quiet=-q 53rustdoc_test_quiet=--test-args -q 54rustdoc_test_kernel_quiet=>/dev/null 55endif 56 57core-cfgs = \ 58 --cfg no_fp_fmt_parse 59 60# `rustc` recognizes `--remap-path-prefix` since 1.26.0, but `rustdoc` only 61# since Rust 1.81.0. Moreover, `rustdoc` ICEs on out-of-tree builds since Rust 62# 1.82.0 (https://github.com/rust-lang/rust/issues/138520). Thus workaround both 63# issues skipping the flag. The former also applies to `RUSTDOC TK`. 64quiet_cmd_rustdoc = RUSTDOC $(if $(rustdoc_host),H, ) $< 65 cmd_rustdoc = \ 66 OBJTREE=$(abspath $(objtree)) \ 67 $(RUSTDOC) $(filter-out $(skip_flags) --remap-path-prefix=%,$(if $(rustdoc_host),$(rust_common_flags),$(rust_flags))) \ 68 $(rustc_target_flags) -L$(objtree)/$(obj) \ 69 -Zunstable-options --generate-link-to-definition \ 70 --output $(rustdoc_output) \ 71 --crate-name $(subst rustdoc-,,$@) \ 72 $(if $(rustdoc_host),,--sysroot=/dev/null) \ 73 @$(objtree)/include/generated/rustc_cfg $< 74 75# The `html_logo_url` and `html_favicon_url` forms of the `doc` attribute 76# can be used to specify a custom logo. However: 77# - The given value is used as-is, thus it cannot be relative or a local file 78# (unlike the non-custom case) since the generated docs have subfolders. 79# - It requires adding it to every crate. 80# - It requires changing `core` which comes from the sysroot. 81# 82# Using `-Zcrate-attr` would solve the last two points, but not the first. 83# The https://github.com/rust-lang/rfcs/pull/3226 RFC suggests two new 84# command-like flags to solve the issue. Meanwhile, we use the non-custom case 85# and then retouch the generated files. 86rustdoc: rustdoc-core rustdoc-macros rustdoc-compiler_builtins \ 87 rustdoc-kernel 88 $(Q)cp $(srctree)/Documentation/images/logo.svg $(rustdoc_output)/static.files/ 89 $(Q)cp $(srctree)/Documentation/images/COPYING-logo $(rustdoc_output)/static.files/ 90 $(Q)find $(rustdoc_output) -name '*.html' -type f -print0 | xargs -0 sed -Ei \ 91 -e 's:rust-logo-[0-9a-f]+\.svg:logo.svg:g' \ 92 -e 's:favicon-[0-9a-f]+\.svg:logo.svg:g' \ 93 -e 's:<link rel="alternate icon" type="image/png" href="[/.]+/static\.files/favicon-(16x16|32x32)-[0-9a-f]+\.png">::g' \ 94 -e 's:<a href="srctree/([^"]+)">:<a href="$(realpath $(srctree))/\1">:g' 95 $(Q)for f in $(rustdoc_output)/static.files/rustdoc-*.css; do \ 96 echo ".logo-container > img { object-fit: contain; }" >> $$f; done 97 98rustdoc-macros: private rustdoc_host = yes 99rustdoc-macros: private rustc_target_flags = --crate-type proc-macro \ 100 --extern proc_macro 101rustdoc-macros: $(src)/macros/lib.rs FORCE 102 +$(call if_changed,rustdoc) 103 104# Starting with Rust 1.82.0, skipping `-Wrustdoc::unescaped_backticks` should 105# not be needed -- see https://github.com/rust-lang/rust/pull/128307. 106rustdoc-core: private skip_flags = -Wrustdoc::unescaped_backticks 107rustdoc-core: private rustc_target_flags = $(core-cfgs) 108rustdoc-core: $(RUST_LIB_SRC)/core/src/lib.rs FORCE 109 +$(call if_changed,rustdoc) 110 111rustdoc-compiler_builtins: $(src)/compiler_builtins.rs rustdoc-core FORCE 112 +$(call if_changed,rustdoc) 113 114rustdoc-ffi: $(src)/ffi.rs rustdoc-core FORCE 115 +$(call if_changed,rustdoc) 116 117rustdoc-kernel: private rustc_target_flags = --extern ffi \ 118 --extern build_error --extern macros \ 119 --extern bindings --extern uapi 120rustdoc-kernel: $(src)/kernel/lib.rs rustdoc-core rustdoc-ffi rustdoc-macros \ 121 rustdoc-compiler_builtins $(obj)/$(libmacros_name) \ 122 $(obj)/bindings.o FORCE 123 +$(call if_changed,rustdoc) 124 125quiet_cmd_rustc_test_library = $(RUSTC_OR_CLIPPY_QUIET) TL $< 126 cmd_rustc_test_library = \ 127 OBJTREE=$(abspath $(objtree)) \ 128 $(RUSTC_OR_CLIPPY) $(rust_common_flags) \ 129 @$(objtree)/include/generated/rustc_cfg $(rustc_target_flags) \ 130 --crate-type $(if $(rustc_test_library_proc),proc-macro,rlib) \ 131 --out-dir $(objtree)/$(obj)/test --cfg testlib \ 132 -L$(objtree)/$(obj)/test \ 133 --crate-name $(subst rusttest-,,$(subst rusttestlib-,,$@)) $< 134 135rusttestlib-build_error: $(src)/build_error.rs FORCE 136 +$(call if_changed,rustc_test_library) 137 138rusttestlib-ffi: $(src)/ffi.rs FORCE 139 +$(call if_changed,rustc_test_library) 140 141rusttestlib-macros: private rustc_target_flags = --extern proc_macro 142rusttestlib-macros: private rustc_test_library_proc = yes 143rusttestlib-macros: $(src)/macros/lib.rs FORCE 144 +$(call if_changed,rustc_test_library) 145 146rusttestlib-kernel: private rustc_target_flags = --extern ffi \ 147 --extern build_error --extern macros \ 148 --extern bindings --extern uapi 149rusttestlib-kernel: $(src)/kernel/lib.rs \ 150 rusttestlib-bindings rusttestlib-uapi rusttestlib-build_error \ 151 $(obj)/$(libmacros_name) $(obj)/bindings.o FORCE 152 +$(call if_changed,rustc_test_library) 153 154rusttestlib-bindings: private rustc_target_flags = --extern ffi 155rusttestlib-bindings: $(src)/bindings/lib.rs rusttestlib-ffi FORCE 156 +$(call if_changed,rustc_test_library) 157 158rusttestlib-uapi: private rustc_target_flags = --extern ffi 159rusttestlib-uapi: $(src)/uapi/lib.rs rusttestlib-ffi FORCE 160 +$(call if_changed,rustc_test_library) 161 162quiet_cmd_rustdoc_test = RUSTDOC T $< 163 cmd_rustdoc_test = \ 164 RUST_MODFILE=test.rs \ 165 OBJTREE=$(abspath $(objtree)) \ 166 $(RUSTDOC) --test $(rust_common_flags) \ 167 @$(objtree)/include/generated/rustc_cfg \ 168 $(rustc_target_flags) $(rustdoc_test_target_flags) \ 169 $(rustdoc_test_quiet) \ 170 -L$(objtree)/$(obj)/test --output $(rustdoc_output) \ 171 --crate-name $(subst rusttest-,,$@) $< 172 173quiet_cmd_rustdoc_test_kernel = RUSTDOC TK $< 174 cmd_rustdoc_test_kernel = \ 175 rm -rf $(objtree)/$(obj)/test/doctests/kernel; \ 176 mkdir -p $(objtree)/$(obj)/test/doctests/kernel; \ 177 OBJTREE=$(abspath $(objtree)) \ 178 $(RUSTDOC) --test $(filter-out --remap-path-prefix=%,$(rust_flags)) \ 179 -L$(objtree)/$(obj) --extern ffi --extern kernel \ 180 --extern build_error --extern macros \ 181 --extern bindings --extern uapi \ 182 --no-run --crate-name kernel -Zunstable-options \ 183 --sysroot=/dev/null \ 184 --test-builder $(objtree)/scripts/rustdoc_test_builder \ 185 $< $(rustdoc_test_kernel_quiet); \ 186 $(objtree)/scripts/rustdoc_test_gen 187 188%/doctests_kernel_generated.rs %/doctests_kernel_generated_kunit.c: \ 189 $(src)/kernel/lib.rs $(obj)/kernel.o \ 190 $(objtree)/scripts/rustdoc_test_builder \ 191 $(objtree)/scripts/rustdoc_test_gen FORCE 192 +$(call if_changed,rustdoc_test_kernel) 193 194# We cannot use `-Zpanic-abort-tests` because some tests are dynamic, 195# so for the moment we skip `-Cpanic=abort`. 196quiet_cmd_rustc_test = $(RUSTC_OR_CLIPPY_QUIET) T $< 197 cmd_rustc_test = \ 198 OBJTREE=$(abspath $(objtree)) \ 199 $(RUSTC_OR_CLIPPY) --test $(rust_common_flags) \ 200 @$(objtree)/include/generated/rustc_cfg \ 201 $(rustc_target_flags) --out-dir $(objtree)/$(obj)/test \ 202 -L$(objtree)/$(obj)/test \ 203 --crate-name $(subst rusttest-,,$@) $<; \ 204 $(objtree)/$(obj)/test/$(subst rusttest-,,$@) $(rust_test_quiet) \ 205 $(rustc_test_run_flags) 206 207rusttest: rusttest-macros rusttest-kernel 208 209rusttest-macros: private rustc_target_flags = --extern proc_macro \ 210 --extern macros --extern kernel 211rusttest-macros: private rustdoc_test_target_flags = --crate-type proc-macro 212rusttest-macros: $(src)/macros/lib.rs \ 213 rusttestlib-macros rusttestlib-kernel FORCE 214 +$(call if_changed,rustc_test) 215 +$(call if_changed,rustdoc_test) 216 217rusttest-kernel: private rustc_target_flags = --extern ffi \ 218 --extern build_error --extern macros --extern bindings --extern uapi 219rusttest-kernel: $(src)/kernel/lib.rs rusttestlib-ffi rusttestlib-kernel \ 220 rusttestlib-build_error rusttestlib-macros rusttestlib-bindings \ 221 rusttestlib-uapi FORCE 222 +$(call if_changed,rustc_test) 223 224ifdef CONFIG_CC_IS_CLANG 225bindgen_c_flags = $(c_flags) 226else 227# bindgen relies on libclang to parse C. Ideally, bindgen would support a GCC 228# plugin backend and/or the Clang driver would be perfectly compatible with GCC. 229# 230# For the moment, here we are tweaking the flags on the fly. This is a hack, 231# and some kernel configurations may not work (e.g. `GCC_PLUGIN_RANDSTRUCT` 232# if we end up using one of those structs). 233bindgen_skip_c_flags := -mno-fp-ret-in-387 -mpreferred-stack-boundary=% \ 234 -mskip-rax-setup -mgeneral-regs-only -msign-return-address=% \ 235 -mindirect-branch=thunk-extern -mindirect-branch-register \ 236 -mfunction-return=thunk-extern -mrecord-mcount -mabi=lp64 \ 237 -mindirect-branch-cs-prefix -mstack-protector-guard% -mtraceback=no \ 238 -mno-pointers-to-nested-functions -mno-string \ 239 -mno-strict-align -mstrict-align \ 240 -fconserve-stack -falign-jumps=% -falign-loops=% \ 241 -femit-struct-debug-baseonly -fno-ipa-cp-clone -fno-ipa-sra \ 242 -fno-partial-inlining -fplugin-arg-arm_ssp_per_task_plugin-% \ 243 -fno-reorder-blocks -fno-allow-store-data-races -fasan-shadow-offset=% \ 244 -fzero-call-used-regs=% -fno-stack-clash-protection \ 245 -fno-inline-functions-called-once -fsanitize=bounds-strict \ 246 -fstrict-flex-arrays=% -fmin-function-alignment=% \ 247 -fzero-init-padding-bits=% \ 248 --param=% --param asan-% 249 250# Derived from `scripts/Makefile.clang`. 251BINDGEN_TARGET_x86 := x86_64-linux-gnu 252BINDGEN_TARGET_arm64 := aarch64-linux-gnu 253BINDGEN_TARGET := $(BINDGEN_TARGET_$(SRCARCH)) 254 255# All warnings are inhibited since GCC builds are very experimental, 256# many GCC warnings are not supported by Clang, they may only appear in 257# some configurations, with new GCC versions, etc. 258bindgen_extra_c_flags = -w --target=$(BINDGEN_TARGET) 259 260# Auto variable zero-initialization requires an additional special option with 261# clang that is going to be removed sometime in the future (likely in 262# clang-18), so make sure to pass this option only if clang supports it 263# (libclang major version < 16). 264# 265# https://github.com/llvm/llvm-project/issues/44842 266# https://github.com/llvm/llvm-project/blob/llvmorg-16.0.0-rc2/clang/docs/ReleaseNotes.rst#deprecated-compiler-flags 267ifdef CONFIG_INIT_STACK_ALL_ZERO 268libclang_maj_ver=$(shell $(BINDGEN) $(srctree)/scripts/rust_is_available_bindgen_libclang.h 2>&1 | sed -ne 's/.*clang version \([0-9]*\).*/\1/p') 269ifeq ($(shell expr $(libclang_maj_ver) \< 16), 1) 270bindgen_extra_c_flags += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang 271endif 272endif 273 274bindgen_c_flags = $(filter-out $(bindgen_skip_c_flags), $(c_flags)) \ 275 $(bindgen_extra_c_flags) 276endif 277 278ifdef CONFIG_LTO 279bindgen_c_flags_lto = $(filter-out $(CC_FLAGS_LTO), $(bindgen_c_flags)) 280else 281bindgen_c_flags_lto = $(bindgen_c_flags) 282endif 283 284# `-fno-builtin` is passed to avoid `bindgen` from using `clang` builtin 285# prototypes for functions like `memcpy` -- if this flag is not passed, 286# `bindgen`-generated prototypes use `c_ulong` or `c_uint` depending on 287# architecture instead of generating `usize`. 288bindgen_c_flags_final = $(bindgen_c_flags_lto) -fno-builtin -D__BINDGEN__ 289 290# Each `bindgen` release may upgrade the list of Rust target versions. By 291# default, the highest stable release in their list is used. Thus we need to set 292# a `--rust-target` to avoid future `bindgen` releases emitting code that 293# `rustc` may not understand. On top of that, `bindgen` does not support passing 294# an unknown Rust target version. 295# 296# Therefore, the Rust target for `bindgen` can be only as high as the minimum 297# Rust version the kernel supports and only as high as the greatest stable Rust 298# target supported by the minimum `bindgen` version the kernel supports (that 299# is, if we do not test the actual `rustc`/`bindgen` versions running). 300# 301# Starting with `bindgen` 0.71.0, we will be able to set any future Rust version 302# instead, i.e. we will be able to set here our minimum supported Rust version. 303quiet_cmd_bindgen = BINDGEN $@ 304 cmd_bindgen = \ 305 $(BINDGEN) $< $(bindgen_target_flags) --rust-target 1.68 \ 306 --use-core --with-derive-default --ctypes-prefix ffi --no-layout-tests \ 307 --no-debug '.*' --enable-function-attribute-detection \ 308 -o $@ -- $(bindgen_c_flags_final) -DMODULE \ 309 $(bindgen_target_cflags) $(bindgen_target_extra) 310 311$(obj)/bindings/bindings_generated.rs: private bindgen_target_flags = \ 312 $(shell grep -Ev '^#|^$$' $(src)/bindgen_parameters) 313$(obj)/bindings/bindings_generated.rs: private bindgen_target_extra = ; \ 314 sed -Ei 's/pub const RUST_CONST_HELPER_([a-zA-Z0-9_]*)/pub const \1/g' $@ 315$(obj)/bindings/bindings_generated.rs: $(src)/bindings/bindings_helper.h \ 316 $(src)/bindgen_parameters FORCE 317 $(call if_changed_dep,bindgen) 318 319$(obj)/uapi/uapi_generated.rs: private bindgen_target_flags = \ 320 $(shell grep -Ev '^#|^$$' $(src)/bindgen_parameters) 321$(obj)/uapi/uapi_generated.rs: $(src)/uapi/uapi_helper.h \ 322 $(src)/bindgen_parameters FORCE 323 $(call if_changed_dep,bindgen) 324 325# See `CFLAGS_REMOVE_helpers.o` above. In addition, Clang on C does not warn 326# with `-Wmissing-declarations` (unlike GCC), so it is not strictly needed here 327# given it is `libclang`; but for consistency, future Clang changes and/or 328# a potential future GCC backend for `bindgen`, we disable it too. 329$(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_flags = \ 330 --blocklist-type '.*' --allowlist-var '' \ 331 --allowlist-function 'rust_helper_.*' 332$(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_cflags = \ 333 -I$(objtree)/$(obj) -Wno-missing-prototypes -Wno-missing-declarations 334$(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_extra = ; \ 335 sed -Ei 's/pub fn rust_helper_([a-zA-Z0-9_]*)/#[link_name="rust_helper_\1"]\n pub fn \1/g' $@ 336$(obj)/bindings/bindings_helpers_generated.rs: $(src)/helpers/helpers.c FORCE 337 $(call if_changed_dep,bindgen) 338 339rust_exports = $(NM) -p --defined-only $(1) | awk '$$2~/(T|R|D|B)/ && $$3!~/__cfi/ && $$3!~/__odr_asan/ { printf $(2),$$3 }' 340 341quiet_cmd_exports = EXPORTS $@ 342 cmd_exports = \ 343 $(call rust_exports,$<,"EXPORT_SYMBOL_RUST_GPL(%s);\n") > $@ 344 345$(obj)/exports_core_generated.h: $(obj)/core.o FORCE 346 $(call if_changed,exports) 347 348# Even though Rust kernel modules should never use the bindings directly, 349# symbols from the `bindings` crate and the C helpers need to be exported 350# because Rust generics and inlined functions may not get their code generated 351# in the crate where they are defined. Other helpers, called from non-inline 352# functions, may not be exported, in principle. However, in general, the Rust 353# compiler does not guarantee codegen will be performed for a non-inline 354# function either. Therefore, we export all symbols from helpers and bindings. 355# In the future, this may be revisited to reduce the number of exports after 356# the compiler is informed about the places codegen is required. 357$(obj)/exports_helpers_generated.h: $(obj)/helpers/helpers.o FORCE 358 $(call if_changed,exports) 359 360$(obj)/exports_bindings_generated.h: $(obj)/bindings.o FORCE 361 $(call if_changed,exports) 362 363$(obj)/exports_kernel_generated.h: $(obj)/kernel.o FORCE 364 $(call if_changed,exports) 365 366quiet_cmd_rustc_procmacro = $(RUSTC_OR_CLIPPY_QUIET) P $@ 367 cmd_rustc_procmacro = \ 368 $(RUSTC_OR_CLIPPY) $(rust_common_flags) \ 369 -Clinker-flavor=gcc -Clinker=$(HOSTCC) \ 370 -Clink-args='$(call escsq,$(KBUILD_PROCMACROLDFLAGS))' \ 371 --emit=dep-info=$(depfile) --emit=link=$@ --extern proc_macro \ 372 --crate-type proc-macro \ 373 --crate-name $(patsubst lib%.$(libmacros_extension),%,$(notdir $@)) $< 374 375# Procedural macros can only be used with the `rustc` that compiled it. 376$(obj)/$(libmacros_name): $(src)/macros/lib.rs FORCE 377 +$(call if_changed_dep,rustc_procmacro) 378 379quiet_cmd_rustc_library = $(if $(skip_clippy),RUSTC,$(RUSTC_OR_CLIPPY_QUIET)) L $@ 380 cmd_rustc_library = \ 381 OBJTREE=$(abspath $(objtree)) \ 382 $(if $(skip_clippy),$(RUSTC),$(RUSTC_OR_CLIPPY)) \ 383 $(filter-out $(skip_flags),$(rust_flags) $(rustc_target_flags)) \ 384 --emit=dep-info=$(depfile) --emit=obj=$@ \ 385 --emit=metadata=$(dir $@)$(patsubst %.o,lib%.rmeta,$(notdir $@)) \ 386 --crate-type rlib -L$(objtree)/$(obj) \ 387 --crate-name $(patsubst %.o,%,$(notdir $@)) $< \ 388 --sysroot=/dev/null \ 389 $(if $(rustc_objcopy),;$(OBJCOPY) $(rustc_objcopy) $@) \ 390 $(cmd_objtool) 391 392rust-analyzer: 393 $(Q)MAKEFLAGS= $(srctree)/scripts/generate_rust_analyzer.py \ 394 --cfgs='core=$(core-cfgs)' \ 395 $(realpath $(srctree)) $(realpath $(objtree)) \ 396 $(rustc_sysroot) $(RUST_LIB_SRC) $(if $(KBUILD_EXTMOD),$(srcroot)) \ 397 > rust-project.json 398 399redirect-intrinsics = \ 400 __addsf3 __eqsf2 __extendsfdf2 __gesf2 __lesf2 __ltsf2 __mulsf3 __nesf2 __truncdfsf2 __unordsf2 \ 401 __adddf3 __eqdf2 __ledf2 __ltdf2 __muldf3 __unorddf2 \ 402 __muloti4 __multi3 \ 403 __udivmodti4 __udivti3 __umodti3 404 405ifneq ($(or $(CONFIG_ARM64),$(and $(CONFIG_RISCV),$(CONFIG_64BIT))),) 406 # These intrinsics are defined for ARM64 and RISCV64 407 redirect-intrinsics += \ 408 __ashrti3 \ 409 __ashlti3 __lshrti3 410endif 411 412ifdef CONFIG_MODVERSIONS 413cmd_gendwarfksyms = $(if $(skip_gendwarfksyms),, \ 414 $(call rust_exports,$@,"%s\n") | \ 415 scripts/gendwarfksyms/gendwarfksyms \ 416 $(if $(KBUILD_GENDWARFKSYMS_STABLE), --stable) \ 417 $(if $(KBUILD_SYMTYPES), --symtypes $(@:.o=.symtypes),) \ 418 $@ >> $(dot-target).cmd) 419endif 420 421define rule_rustc_library 422 $(call cmd_and_fixdep,rustc_library) 423 $(call cmd,gen_objtooldep) 424 $(call cmd,gendwarfksyms) 425endef 426 427define rule_rust_cc_library 428 $(call if_changed_rule,cc_o_c) 429 $(call cmd,force_checksrc) 430 $(call cmd,gendwarfksyms) 431endef 432 433# helpers.o uses the same export mechanism as Rust libraries, so ensure symbol 434# versions are calculated for the helpers too. 435$(obj)/helpers/helpers.o: $(src)/helpers/helpers.c $(recordmcount_source) FORCE 436 +$(call if_changed_rule,rust_cc_library) 437 438# Disable symbol versioning for exports.o to avoid conflicts with the actual 439# symbol versions generated from Rust objects. 440$(obj)/exports.o: private skip_gendwarfksyms = 1 441 442$(obj)/core.o: private skip_clippy = 1 443$(obj)/core.o: private skip_flags = -Wunreachable_pub 444$(obj)/core.o: private rustc_objcopy = $(foreach sym,$(redirect-intrinsics),--redefine-sym $(sym)=__rust$(sym)) 445$(obj)/core.o: private rustc_target_flags = $(core-cfgs) 446$(obj)/core.o: $(RUST_LIB_SRC)/core/src/lib.rs \ 447 $(wildcard $(objtree)/include/config/RUSTC_VERSION_TEXT) FORCE 448 +$(call if_changed_rule,rustc_library) 449ifneq ($(or $(CONFIG_X86_64),$(CONFIG_X86_32)),) 450$(obj)/core.o: scripts/target.json 451endif 452 453$(obj)/compiler_builtins.o: private skip_gendwarfksyms = 1 454$(obj)/compiler_builtins.o: private rustc_objcopy = -w -W '__*' 455$(obj)/compiler_builtins.o: $(src)/compiler_builtins.rs $(obj)/core.o FORCE 456 +$(call if_changed_rule,rustc_library) 457 458$(obj)/build_error.o: private skip_gendwarfksyms = 1 459$(obj)/build_error.o: $(src)/build_error.rs $(obj)/compiler_builtins.o FORCE 460 +$(call if_changed_rule,rustc_library) 461 462$(obj)/ffi.o: private skip_gendwarfksyms = 1 463$(obj)/ffi.o: $(src)/ffi.rs $(obj)/compiler_builtins.o FORCE 464 +$(call if_changed_rule,rustc_library) 465 466$(obj)/bindings.o: private rustc_target_flags = --extern ffi 467$(obj)/bindings.o: $(src)/bindings/lib.rs \ 468 $(obj)/ffi.o \ 469 $(obj)/bindings/bindings_generated.rs \ 470 $(obj)/bindings/bindings_helpers_generated.rs FORCE 471 +$(call if_changed_rule,rustc_library) 472 473$(obj)/uapi.o: private rustc_target_flags = --extern ffi 474$(obj)/uapi.o: private skip_gendwarfksyms = 1 475$(obj)/uapi.o: $(src)/uapi/lib.rs \ 476 $(obj)/ffi.o \ 477 $(obj)/uapi/uapi_generated.rs FORCE 478 +$(call if_changed_rule,rustc_library) 479 480$(obj)/kernel.o: private rustc_target_flags = --extern ffi \ 481 --extern build_error --extern macros --extern bindings --extern uapi 482$(obj)/kernel.o: $(src)/kernel/lib.rs $(obj)/build_error.o \ 483 $(obj)/$(libmacros_name) $(obj)/bindings.o $(obj)/uapi.o FORCE 484 +$(call if_changed_rule,rustc_library) 485 486ifdef CONFIG_JUMP_LABEL 487$(obj)/kernel.o: $(obj)/kernel/generated_arch_static_branch_asm.rs 488endif 489 490endif # CONFIG_RUST 491
