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 pin_init.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 44libpin_init_internal_name := $(shell MAKEFLAGS= $(RUSTC) --print file-names --crate-name pin_init_internal --crate-type proc-macro - </dev/null) 45libpin_init_internal_extension := $(patsubst libpin_init_internal.%,%,$(libpin_init_internal_name)) 46 47always-$(CONFIG_RUST) += $(libmacros_name) $(libpin_init_internal_name) 48 49# `$(rust_flags)` is passed in case the user added `--sysroot`. 50rustc_sysroot := $(shell MAKEFLAGS= $(RUSTC) $(rust_flags) --print sysroot) 51rustc_host_target := $(shell $(RUSTC) --version --verbose | grep -F 'host: ' | cut -d' ' -f2) 52RUST_LIB_SRC ?= $(rustc_sysroot)/lib/rustlib/src/rust/library 53 54ifneq ($(quiet),) 55rust_test_quiet=-q 56rustdoc_test_quiet=--test-args -q 57rustdoc_test_kernel_quiet=>/dev/null 58endif 59 60core-cfgs = \ 61 --cfg no_fp_fmt_parse 62 63quiet_cmd_rustdoc = RUSTDOC $(if $(rustdoc_host),H, ) $< 64 cmd_rustdoc = \ 65 OBJTREE=$(abspath $(objtree)) \ 66 $(RUSTDOC) $(filter-out $(skip_flags),$(if $(rustdoc_host),$(rust_common_flags),$(rust_flags))) \ 67 $(rustc_target_flags) -L$(objtree)/$(obj) \ 68 -Zunstable-options --generate-link-to-definition \ 69 --output $(rustdoc_output) \ 70 --crate-name $(subst rustdoc-,,$@) \ 71 $(if $(rustdoc_host),,--sysroot=/dev/null) \ 72 @$(objtree)/include/generated/rustc_cfg $< 73 74# The `html_logo_url` and `html_favicon_url` forms of the `doc` attribute 75# can be used to specify a custom logo. However: 76# - The given value is used as-is, thus it cannot be relative or a local file 77# (unlike the non-custom case) since the generated docs have subfolders. 78# - It requires adding it to every crate. 79# - It requires changing `core` which comes from the sysroot. 80# 81# Using `-Zcrate-attr` would solve the last two points, but not the first. 82# The https://github.com/rust-lang/rfcs/pull/3226 RFC suggests two new 83# command-like flags to solve the issue. Meanwhile, we use the non-custom case 84# and then retouch the generated files. 85rustdoc: rustdoc-core rustdoc-macros rustdoc-compiler_builtins \ 86 rustdoc-kernel rustdoc-pin_init 87 $(Q)cp $(srctree)/Documentation/images/logo.svg $(rustdoc_output)/static.files/ 88 $(Q)cp $(srctree)/Documentation/images/COPYING-logo $(rustdoc_output)/static.files/ 89 $(Q)find $(rustdoc_output) -name '*.html' -type f -print0 | xargs -0 sed -Ei \ 90 -e 's:rust-logo-[0-9a-f]+\.svg:logo.svg:g' \ 91 -e 's:favicon-[0-9a-f]+\.svg:logo.svg:g' \ 92 -e 's:<link rel="alternate icon" type="image/png" href="[/.]+/static\.files/favicon-(16x16|32x32)-[0-9a-f]+\.png">::g' \ 93 -e 's:<a href="srctree/([^"]+)">:<a href="$(realpath $(srctree))/\1">:g' 94 $(Q)for f in $(rustdoc_output)/static.files/rustdoc-*.css; do \ 95 echo ".logo-container > img { object-fit: contain; }" >> $$f; done 96 97rustdoc-macros: private rustdoc_host = yes 98rustdoc-macros: private rustc_target_flags = --crate-type proc-macro \ 99 --extern proc_macro 100rustdoc-macros: $(src)/macros/lib.rs FORCE 101 +$(call if_changed,rustdoc) 102 103# Starting with Rust 1.82.0, skipping `-Wrustdoc::unescaped_backticks` should 104# not be needed -- see https://github.com/rust-lang/rust/pull/128307. 105rustdoc-core: private skip_flags = -Wrustdoc::unescaped_backticks 106rustdoc-core: private rustc_target_flags = $(core-cfgs) 107rustdoc-core: $(RUST_LIB_SRC)/core/src/lib.rs FORCE 108 +$(call if_changed,rustdoc) 109 110rustdoc-compiler_builtins: $(src)/compiler_builtins.rs rustdoc-core FORCE 111 +$(call if_changed,rustdoc) 112 113rustdoc-ffi: $(src)/ffi.rs rustdoc-core FORCE 114 +$(call if_changed,rustdoc) 115 116rustdoc-pin_init_internal: private rustdoc_host = yes 117rustdoc-pin_init_internal: private rustc_target_flags = --cfg kernel \ 118 --extern proc_macro --crate-type proc-macro 119rustdoc-pin_init_internal: $(src)/pin-init/internal/src/lib.rs FORCE 120 +$(call if_changed,rustdoc) 121 122rustdoc-pin_init: private rustdoc_host = yes 123rustdoc-pin_init: private rustc_target_flags = --extern pin_init_internal \ 124 --extern macros --extern alloc --cfg kernel --cfg feature=\"alloc\" 125rustdoc-pin_init: $(src)/pin-init/src/lib.rs rustdoc-pin_init_internal \ 126 rustdoc-macros FORCE 127 +$(call if_changed,rustdoc) 128 129rustdoc-kernel: private rustc_target_flags = --extern ffi --extern pin_init \ 130 --extern build_error --extern macros \ 131 --extern bindings --extern uapi 132rustdoc-kernel: $(src)/kernel/lib.rs rustdoc-core rustdoc-ffi rustdoc-macros \ 133 rustdoc-pin_init rustdoc-compiler_builtins $(obj)/$(libmacros_name) \ 134 $(obj)/bindings.o FORCE 135 +$(call if_changed,rustdoc) 136 137quiet_cmd_rustc_test_library = $(RUSTC_OR_CLIPPY_QUIET) TL $< 138 cmd_rustc_test_library = \ 139 OBJTREE=$(abspath $(objtree)) \ 140 $(RUSTC_OR_CLIPPY) $(rust_common_flags) \ 141 @$(objtree)/include/generated/rustc_cfg $(rustc_target_flags) \ 142 --crate-type $(if $(rustc_test_library_proc),proc-macro,rlib) \ 143 --out-dir $(objtree)/$(obj)/test --cfg testlib \ 144 -L$(objtree)/$(obj)/test \ 145 --crate-name $(subst rusttest-,,$(subst rusttestlib-,,$@)) $< 146 147rusttestlib-build_error: $(src)/build_error.rs FORCE 148 +$(call if_changed,rustc_test_library) 149 150rusttestlib-ffi: $(src)/ffi.rs FORCE 151 +$(call if_changed,rustc_test_library) 152 153rusttestlib-macros: private rustc_target_flags = --extern proc_macro 154rusttestlib-macros: private rustc_test_library_proc = yes 155rusttestlib-macros: $(src)/macros/lib.rs FORCE 156 +$(call if_changed,rustc_test_library) 157 158rusttestlib-pin_init_internal: private rustc_target_flags = --cfg kernel \ 159 --extern proc_macro 160rusttestlib-pin_init_internal: private rustc_test_library_proc = yes 161rusttestlib-pin_init_internal: $(src)/pin-init/internal/src/lib.rs FORCE 162 +$(call if_changed,rustc_test_library) 163 164rusttestlib-pin_init: private rustc_target_flags = --extern pin_init_internal \ 165 --extern macros --cfg kernel 166rusttestlib-pin_init: $(src)/pin-init/src/lib.rs rusttestlib-macros \ 167 rusttestlib-pin_init_internal $(obj)/$(libpin_init_internal_name) FORCE 168 +$(call if_changed,rustc_test_library) 169 170rusttestlib-kernel: private rustc_target_flags = --extern ffi \ 171 --extern build_error --extern macros --extern pin_init \ 172 --extern bindings --extern uapi 173rusttestlib-kernel: $(src)/kernel/lib.rs rusttestlib-bindings rusttestlib-uapi \ 174 rusttestlib-build_error rusttestlib-pin_init $(obj)/$(libmacros_name) \ 175 $(obj)/bindings.o FORCE 176 +$(call if_changed,rustc_test_library) 177 178rusttestlib-bindings: private rustc_target_flags = --extern ffi 179rusttestlib-bindings: $(src)/bindings/lib.rs rusttestlib-ffi FORCE 180 +$(call if_changed,rustc_test_library) 181 182rusttestlib-uapi: private rustc_target_flags = --extern ffi 183rusttestlib-uapi: $(src)/uapi/lib.rs rusttestlib-ffi FORCE 184 +$(call if_changed,rustc_test_library) 185 186quiet_cmd_rustdoc_test = RUSTDOC T $< 187 cmd_rustdoc_test = \ 188 RUST_MODFILE=test.rs \ 189 OBJTREE=$(abspath $(objtree)) \ 190 $(RUSTDOC) --test $(rust_common_flags) \ 191 @$(objtree)/include/generated/rustc_cfg \ 192 $(rustc_target_flags) $(rustdoc_test_target_flags) \ 193 $(rustdoc_test_quiet) \ 194 -L$(objtree)/$(obj)/test --output $(rustdoc_output) \ 195 --crate-name $(subst rusttest-,,$@) $< 196 197quiet_cmd_rustdoc_test_kernel = RUSTDOC TK $< 198 cmd_rustdoc_test_kernel = \ 199 rm -rf $(objtree)/$(obj)/test/doctests/kernel; \ 200 mkdir -p $(objtree)/$(obj)/test/doctests/kernel; \ 201 OBJTREE=$(abspath $(objtree)) \ 202 $(RUSTDOC) --test $(rust_flags) \ 203 -L$(objtree)/$(obj) --extern ffi --extern pin_init \ 204 --extern kernel --extern build_error --extern macros \ 205 --extern bindings --extern uapi \ 206 --no-run --crate-name kernel -Zunstable-options \ 207 --sysroot=/dev/null \ 208 --test-builder $(objtree)/scripts/rustdoc_test_builder \ 209 $< $(rustdoc_test_kernel_quiet); \ 210 $(objtree)/scripts/rustdoc_test_gen 211 212%/doctests_kernel_generated.rs %/doctests_kernel_generated_kunit.c: \ 213 $(src)/kernel/lib.rs $(obj)/kernel.o \ 214 $(objtree)/scripts/rustdoc_test_builder \ 215 $(objtree)/scripts/rustdoc_test_gen FORCE 216 +$(call if_changed,rustdoc_test_kernel) 217 218# We cannot use `-Zpanic-abort-tests` because some tests are dynamic, 219# so for the moment we skip `-Cpanic=abort`. 220quiet_cmd_rustc_test = $(RUSTC_OR_CLIPPY_QUIET) T $< 221 cmd_rustc_test = \ 222 OBJTREE=$(abspath $(objtree)) \ 223 $(RUSTC_OR_CLIPPY) --test $(rust_common_flags) \ 224 @$(objtree)/include/generated/rustc_cfg \ 225 $(rustc_target_flags) --out-dir $(objtree)/$(obj)/test \ 226 -L$(objtree)/$(obj)/test \ 227 --crate-name $(subst rusttest-,,$@) $<; \ 228 $(objtree)/$(obj)/test/$(subst rusttest-,,$@) $(rust_test_quiet) \ 229 $(rustc_test_run_flags) 230 231rusttest: rusttest-macros rusttest-kernel 232 233rusttest-macros: private rustc_target_flags = --extern proc_macro \ 234 --extern macros --extern kernel --extern pin_init 235rusttest-macros: private rustdoc_test_target_flags = --crate-type proc-macro 236rusttest-macros: $(src)/macros/lib.rs \ 237 rusttestlib-macros rusttestlib-kernel rusttestlib-pin_init FORCE 238 +$(call if_changed,rustc_test) 239 +$(call if_changed,rustdoc_test) 240 241rusttest-kernel: private rustc_target_flags = --extern ffi --extern pin_init \ 242 --extern build_error --extern macros --extern bindings --extern uapi 243rusttest-kernel: $(src)/kernel/lib.rs rusttestlib-ffi rusttestlib-kernel \ 244 rusttestlib-build_error rusttestlib-macros rusttestlib-bindings \ 245 rusttestlib-uapi rusttestlib-pin_init FORCE 246 +$(call if_changed,rustc_test) 247 248ifdef CONFIG_CC_IS_CLANG 249bindgen_c_flags = $(c_flags) 250else 251# bindgen relies on libclang to parse C. Ideally, bindgen would support a GCC 252# plugin backend and/or the Clang driver would be perfectly compatible with GCC. 253# 254# For the moment, here we are tweaking the flags on the fly. This is a hack, 255# and some kernel configurations may not work (e.g. `GCC_PLUGIN_RANDSTRUCT` 256# if we end up using one of those structs). 257bindgen_skip_c_flags := -mno-fp-ret-in-387 -mpreferred-stack-boundary=% \ 258 -mskip-rax-setup -mgeneral-regs-only -msign-return-address=% \ 259 -mindirect-branch=thunk-extern -mindirect-branch-register \ 260 -mfunction-return=thunk-extern -mrecord-mcount -mabi=lp64 \ 261 -mindirect-branch-cs-prefix -mstack-protector-guard% -mtraceback=no \ 262 -mno-pointers-to-nested-functions -mno-string \ 263 -mno-strict-align -mstrict-align -mdirect-extern-access \ 264 -mexplicit-relocs -mno-check-zero-division \ 265 -fconserve-stack -falign-jumps=% -falign-loops=% \ 266 -femit-struct-debug-baseonly -fno-ipa-cp-clone -fno-ipa-sra \ 267 -fno-partial-inlining -fplugin-arg-arm_ssp_per_task_plugin-% \ 268 -fno-reorder-blocks -fno-allow-store-data-races -fasan-shadow-offset=% \ 269 -fzero-call-used-regs=% -fno-stack-clash-protection \ 270 -fno-inline-functions-called-once -fsanitize=bounds-strict \ 271 -fstrict-flex-arrays=% -fmin-function-alignment=% \ 272 -fzero-init-padding-bits=% \ 273 --param=% --param asan-% 274 275# Derived from `scripts/Makefile.clang`. 276BINDGEN_TARGET_x86 := x86_64-linux-gnu 277BINDGEN_TARGET_arm64 := aarch64-linux-gnu 278BINDGEN_TARGET_loongarch := loongarch64-linux-gnusf 279BINDGEN_TARGET_um := $(BINDGEN_TARGET_$(SUBARCH)) 280BINDGEN_TARGET := $(BINDGEN_TARGET_$(SRCARCH)) 281 282# All warnings are inhibited since GCC builds are very experimental, 283# many GCC warnings are not supported by Clang, they may only appear in 284# some configurations, with new GCC versions, etc. 285bindgen_extra_c_flags = -w --target=$(BINDGEN_TARGET) 286 287# Auto variable zero-initialization requires an additional special option with 288# clang that is going to be removed sometime in the future (likely in 289# clang-18), so make sure to pass this option only if clang supports it 290# (libclang major version < 16). 291# 292# https://github.com/llvm/llvm-project/issues/44842 293# https://github.com/llvm/llvm-project/blob/llvmorg-16.0.0-rc2/clang/docs/ReleaseNotes.rst#deprecated-compiler-flags 294ifdef CONFIG_INIT_STACK_ALL_ZERO 295libclang_maj_ver=$(shell $(BINDGEN) $(srctree)/scripts/rust_is_available_bindgen_libclang.h 2>&1 | sed -ne 's/.*clang version \([0-9]*\).*/\1/p') 296ifeq ($(shell expr $(libclang_maj_ver) \< 16), 1) 297bindgen_extra_c_flags += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang 298endif 299endif 300 301bindgen_c_flags = $(filter-out $(bindgen_skip_c_flags), $(c_flags)) \ 302 $(bindgen_extra_c_flags) 303endif 304 305ifdef CONFIG_LTO 306bindgen_c_flags_lto = $(filter-out $(CC_FLAGS_LTO), $(bindgen_c_flags)) 307else 308bindgen_c_flags_lto = $(bindgen_c_flags) 309endif 310 311# `-fno-builtin` is passed to avoid `bindgen` from using `clang` builtin 312# prototypes for functions like `memcpy` -- if this flag is not passed, 313# `bindgen`-generated prototypes use `c_ulong` or `c_uint` depending on 314# architecture instead of generating `usize`. 315bindgen_c_flags_final = $(bindgen_c_flags_lto) -fno-builtin -D__BINDGEN__ 316 317# Each `bindgen` release may upgrade the list of Rust target versions. By 318# default, the highest stable release in their list is used. Thus we need to set 319# a `--rust-target` to avoid future `bindgen` releases emitting code that 320# `rustc` may not understand. On top of that, `bindgen` does not support passing 321# an unknown Rust target version. 322# 323# Therefore, the Rust target for `bindgen` can be only as high as the minimum 324# Rust version the kernel supports and only as high as the greatest stable Rust 325# target supported by the minimum `bindgen` version the kernel supports (that 326# is, if we do not test the actual `rustc`/`bindgen` versions running). 327# 328# Starting with `bindgen` 0.71.0, we will be able to set any future Rust version 329# instead, i.e. we will be able to set here our minimum supported Rust version. 330quiet_cmd_bindgen = BINDGEN $@ 331 cmd_bindgen = \ 332 $(BINDGEN) $< $(bindgen_target_flags) --rust-target 1.68 \ 333 --use-core --with-derive-default --ctypes-prefix ffi --no-layout-tests \ 334 --no-debug '.*' --enable-function-attribute-detection \ 335 -o $@ -- $(bindgen_c_flags_final) -DMODULE \ 336 $(bindgen_target_cflags) $(bindgen_target_extra) 337 338$(obj)/bindings/bindings_generated.rs: private bindgen_target_flags = \ 339 $(shell grep -Ev '^#|^$$' $(src)/bindgen_parameters) 340$(obj)/bindings/bindings_generated.rs: private bindgen_target_extra = ; \ 341 sed -Ei 's/pub const RUST_CONST_HELPER_([a-zA-Z0-9_]*)/pub const \1/g' $@ 342$(obj)/bindings/bindings_generated.rs: $(src)/bindings/bindings_helper.h \ 343 $(src)/bindgen_parameters FORCE 344 $(call if_changed_dep,bindgen) 345 346$(obj)/uapi/uapi_generated.rs: private bindgen_target_flags = \ 347 $(shell grep -Ev '^#|^$$' $(src)/bindgen_parameters) 348$(obj)/uapi/uapi_generated.rs: $(src)/uapi/uapi_helper.h \ 349 $(src)/bindgen_parameters FORCE 350 $(call if_changed_dep,bindgen) 351 352# See `CFLAGS_REMOVE_helpers.o` above. In addition, Clang on C does not warn 353# with `-Wmissing-declarations` (unlike GCC), so it is not strictly needed here 354# given it is `libclang`; but for consistency, future Clang changes and/or 355# a potential future GCC backend for `bindgen`, we disable it too. 356$(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_flags = \ 357 --blocklist-type '.*' --allowlist-var '' \ 358 --allowlist-function 'rust_helper_.*' 359$(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_cflags = \ 360 -I$(objtree)/$(obj) -Wno-missing-prototypes -Wno-missing-declarations 361$(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_extra = ; \ 362 sed -Ei 's/pub fn rust_helper_([a-zA-Z0-9_]*)/#[link_name="rust_helper_\1"]\n pub fn \1/g' $@ 363$(obj)/bindings/bindings_helpers_generated.rs: $(src)/helpers/helpers.c FORCE 364 $(call if_changed_dep,bindgen) 365 366rust_exports = $(NM) -p --defined-only $(1) | awk '$$2~/(T|R|D|B)/ && $$3!~/__cfi/ && $$3!~/__odr_asan/ { printf $(2),$$3 }' 367 368quiet_cmd_exports = EXPORTS $@ 369 cmd_exports = \ 370 $(call rust_exports,$<,"EXPORT_SYMBOL_RUST_GPL(%s);\n") > $@ 371 372$(obj)/exports_core_generated.h: $(obj)/core.o FORCE 373 $(call if_changed,exports) 374 375# Even though Rust kernel modules should never use the bindings directly, 376# symbols from the `bindings` crate and the C helpers need to be exported 377# because Rust generics and inlined functions may not get their code generated 378# in the crate where they are defined. Other helpers, called from non-inline 379# functions, may not be exported, in principle. However, in general, the Rust 380# compiler does not guarantee codegen will be performed for a non-inline 381# function either. Therefore, we export all symbols from helpers and bindings. 382# In the future, this may be revisited to reduce the number of exports after 383# the compiler is informed about the places codegen is required. 384$(obj)/exports_helpers_generated.h: $(obj)/helpers/helpers.o FORCE 385 $(call if_changed,exports) 386 387$(obj)/exports_bindings_generated.h: $(obj)/bindings.o FORCE 388 $(call if_changed,exports) 389 390$(obj)/exports_kernel_generated.h: $(obj)/kernel.o FORCE 391 $(call if_changed,exports) 392 393quiet_cmd_rustc_procmacro = $(RUSTC_OR_CLIPPY_QUIET) P $@ 394 cmd_rustc_procmacro = \ 395 $(RUSTC_OR_CLIPPY) $(rust_common_flags) $(rustc_target_flags) \ 396 -Clinker-flavor=gcc -Clinker=$(HOSTCC) \ 397 -Clink-args='$(call escsq,$(KBUILD_PROCMACROLDFLAGS))' \ 398 --emit=dep-info=$(depfile) --emit=link=$@ --extern proc_macro \ 399 --crate-type proc-macro \ 400 --crate-name $(patsubst lib%.$(libmacros_extension),%,$(notdir $@)) $< 401 402# Procedural macros can only be used with the `rustc` that compiled it. 403$(obj)/$(libmacros_name): $(src)/macros/lib.rs FORCE 404 +$(call if_changed_dep,rustc_procmacro) 405 406$(obj)/$(libpin_init_internal_name): private rustc_target_flags = --cfg kernel 407$(obj)/$(libpin_init_internal_name): $(src)/pin-init/internal/src/lib.rs FORCE 408 +$(call if_changed_dep,rustc_procmacro) 409 410quiet_cmd_rustc_library = $(if $(skip_clippy),RUSTC,$(RUSTC_OR_CLIPPY_QUIET)) L $@ 411 cmd_rustc_library = \ 412 OBJTREE=$(abspath $(objtree)) \ 413 $(if $(skip_clippy),$(RUSTC),$(RUSTC_OR_CLIPPY)) \ 414 $(filter-out $(skip_flags),$(rust_flags) $(rustc_target_flags)) \ 415 --emit=dep-info=$(depfile) --emit=obj=$@ \ 416 --emit=metadata=$(dir $@)$(patsubst %.o,lib%.rmeta,$(notdir $@)) \ 417 --crate-type rlib -L$(objtree)/$(obj) \ 418 --crate-name $(patsubst %.o,%,$(notdir $@)) $< \ 419 --sysroot=/dev/null \ 420 $(if $(rustc_objcopy),;$(OBJCOPY) $(rustc_objcopy) $@) \ 421 $(cmd_objtool) 422 423rust-analyzer: 424 $(Q)MAKEFLAGS= $(srctree)/scripts/generate_rust_analyzer.py \ 425 --cfgs='core=$(core-cfgs)' \ 426 $(realpath $(srctree)) $(realpath $(objtree)) \ 427 $(rustc_sysroot) $(RUST_LIB_SRC) $(if $(KBUILD_EXTMOD),$(srcroot)) \ 428 > rust-project.json 429 430redirect-intrinsics = \ 431 __addsf3 __eqsf2 __extendsfdf2 __gesf2 __lesf2 __ltsf2 __mulsf3 __nesf2 __truncdfsf2 __unordsf2 \ 432 __adddf3 __eqdf2 __ledf2 __ltdf2 __muldf3 __unorddf2 \ 433 __muloti4 __multi3 \ 434 __udivmodti4 __udivti3 __umodti3 435 436ifneq ($(or $(CONFIG_ARM64),$(and $(CONFIG_RISCV),$(CONFIG_64BIT))),) 437 # These intrinsics are defined for ARM64 and RISCV64 438 redirect-intrinsics += \ 439 __ashrti3 \ 440 __ashlti3 __lshrti3 441endif 442 443ifdef CONFIG_MODVERSIONS 444cmd_gendwarfksyms = $(if $(skip_gendwarfksyms),, \ 445 $(call rust_exports,$@,"%s\n") | \ 446 scripts/gendwarfksyms/gendwarfksyms \ 447 $(if $(KBUILD_GENDWARFKSYMS_STABLE), --stable) \ 448 $(if $(KBUILD_SYMTYPES), --symtypes $(@:.o=.symtypes),) \ 449 $@ >> $(dot-target).cmd) 450endif 451 452define rule_rustc_library 453 $(call cmd_and_fixdep,rustc_library) 454 $(call cmd,gen_objtooldep) 455 $(call cmd,gendwarfksyms) 456endef 457 458define rule_rust_cc_library 459 $(call if_changed_rule,cc_o_c) 460 $(call cmd,force_checksrc) 461 $(call cmd,gendwarfksyms) 462endef 463 464# helpers.o uses the same export mechanism as Rust libraries, so ensure symbol 465# versions are calculated for the helpers too. 466$(obj)/helpers/helpers.o: $(src)/helpers/helpers.c $(recordmcount_source) FORCE 467 +$(call if_changed_rule,rust_cc_library) 468 469# Disable symbol versioning for exports.o to avoid conflicts with the actual 470# symbol versions generated from Rust objects. 471$(obj)/exports.o: private skip_gendwarfksyms = 1 472 473$(obj)/core.o: private skip_clippy = 1 474$(obj)/core.o: private skip_flags = -Wunreachable_pub 475$(obj)/core.o: private rustc_objcopy = $(foreach sym,$(redirect-intrinsics),--redefine-sym $(sym)=__rust$(sym)) 476$(obj)/core.o: private rustc_target_flags = $(core-cfgs) 477$(obj)/core.o: $(RUST_LIB_SRC)/core/src/lib.rs \ 478 $(wildcard $(objtree)/include/config/RUSTC_VERSION_TEXT) FORCE 479 +$(call if_changed_rule,rustc_library) 480ifneq ($(or $(CONFIG_X86_64),$(CONFIG_X86_32)),) 481$(obj)/core.o: scripts/target.json 482endif 483 484$(obj)/compiler_builtins.o: private skip_gendwarfksyms = 1 485$(obj)/compiler_builtins.o: private rustc_objcopy = -w -W '__*' 486$(obj)/compiler_builtins.o: $(src)/compiler_builtins.rs $(obj)/core.o FORCE 487 +$(call if_changed_rule,rustc_library) 488 489$(obj)/pin_init.o: private skip_gendwarfksyms = 1 490$(obj)/pin_init.o: private rustc_target_flags = --extern pin_init_internal \ 491 --extern macros --cfg kernel 492$(obj)/pin_init.o: $(src)/pin-init/src/lib.rs $(obj)/compiler_builtins.o \ 493 $(obj)/$(libpin_init_internal_name) $(obj)/$(libmacros_name) FORCE 494 +$(call if_changed_rule,rustc_library) 495 496$(obj)/build_error.o: private skip_gendwarfksyms = 1 497$(obj)/build_error.o: $(src)/build_error.rs $(obj)/compiler_builtins.o FORCE 498 +$(call if_changed_rule,rustc_library) 499 500$(obj)/ffi.o: private skip_gendwarfksyms = 1 501$(obj)/ffi.o: $(src)/ffi.rs $(obj)/compiler_builtins.o FORCE 502 +$(call if_changed_rule,rustc_library) 503 504$(obj)/bindings.o: private rustc_target_flags = --extern ffi 505$(obj)/bindings.o: $(src)/bindings/lib.rs \ 506 $(obj)/ffi.o \ 507 $(obj)/bindings/bindings_generated.rs \ 508 $(obj)/bindings/bindings_helpers_generated.rs FORCE 509 +$(call if_changed_rule,rustc_library) 510 511$(obj)/uapi.o: private rustc_target_flags = --extern ffi 512$(obj)/uapi.o: private skip_gendwarfksyms = 1 513$(obj)/uapi.o: $(src)/uapi/lib.rs \ 514 $(obj)/ffi.o \ 515 $(obj)/uapi/uapi_generated.rs FORCE 516 +$(call if_changed_rule,rustc_library) 517 518$(obj)/kernel.o: private rustc_target_flags = --extern ffi --extern pin_init \ 519 --extern build_error --extern macros --extern bindings --extern uapi 520$(obj)/kernel.o: $(src)/kernel/lib.rs $(obj)/build_error.o $(obj)/pin_init.o \ 521 $(obj)/$(libmacros_name) $(obj)/bindings.o $(obj)/uapi.o FORCE 522 +$(call if_changed_rule,rustc_library) 523 524ifdef CONFIG_JUMP_LABEL 525$(obj)/kernel.o: $(obj)/kernel/generated_arch_static_branch_asm.rs 526endif 527 528endif # CONFIG_RUST 529
