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 63# `rustc` recognizes `--remap-path-prefix` since 1.26.0, but `rustdoc` only 64# since Rust 1.81.0. Moreover, `rustdoc` ICEs on out-of-tree builds since Rust 65# 1.82.0 (https://github.com/rust-lang/rust/issues/138520). Thus workaround both 66# issues skipping the flag. The former also applies to `RUSTDOC TK`. 67quiet_cmd_rustdoc = RUSTDOC $(if $(rustdoc_host),H, ) $< 68 cmd_rustdoc = \ 69 OBJTREE=$(abspath $(objtree)) \ 70 $(RUSTDOC) $(filter-out $(skip_flags) --remap-path-prefix=%,$(if $(rustdoc_host),$(rust_common_flags),$(rust_flags))) \ 71 $(rustc_target_flags) -L$(objtree)/$(obj) \ 72 -Zunstable-options --generate-link-to-definition \ 73 --output $(rustdoc_output) \ 74 --crate-name $(subst rustdoc-,,$@) \ 75 $(if $(rustdoc_host),,--sysroot=/dev/null) \ 76 @$(objtree)/include/generated/rustc_cfg $< 77 78# The `html_logo_url` and `html_favicon_url` forms of the `doc` attribute 79# can be used to specify a custom logo. However: 80# - The given value is used as-is, thus it cannot be relative or a local file 81# (unlike the non-custom case) since the generated docs have subfolders. 82# - It requires adding it to every crate. 83# - It requires changing `core` which comes from the sysroot. 84# 85# Using `-Zcrate-attr` would solve the last two points, but not the first. 86# The https://github.com/rust-lang/rfcs/pull/3226 RFC suggests two new 87# command-like flags to solve the issue. Meanwhile, we use the non-custom case 88# and then retouch the generated files. 89rustdoc: rustdoc-core rustdoc-macros rustdoc-compiler_builtins \ 90 rustdoc-kernel rustdoc-pin_init 91 $(Q)cp $(srctree)/Documentation/images/logo.svg $(rustdoc_output)/static.files/ 92 $(Q)cp $(srctree)/Documentation/images/COPYING-logo $(rustdoc_output)/static.files/ 93 $(Q)find $(rustdoc_output) -name '*.html' -type f -print0 | xargs -0 sed -Ei \ 94 -e 's:rust-logo-[0-9a-f]+\.svg:logo.svg:g' \ 95 -e 's:favicon-[0-9a-f]+\.svg:logo.svg:g' \ 96 -e 's:<link rel="alternate icon" type="image/png" href="[/.]+/static\.files/favicon-(16x16|32x32)-[0-9a-f]+\.png">::g' \ 97 -e 's:<a href="srctree/([^"]+)">:<a href="$(realpath $(srctree))/\1">:g' 98 $(Q)for f in $(rustdoc_output)/static.files/rustdoc-*.css; do \ 99 echo ".logo-container > img { object-fit: contain; }" >> $$f; done 100 101rustdoc-macros: private rustdoc_host = yes 102rustdoc-macros: private rustc_target_flags = --crate-type proc-macro \ 103 --extern proc_macro 104rustdoc-macros: $(src)/macros/lib.rs FORCE 105 +$(call if_changed,rustdoc) 106 107# Starting with Rust 1.82.0, skipping `-Wrustdoc::unescaped_backticks` should 108# not be needed -- see https://github.com/rust-lang/rust/pull/128307. 109rustdoc-core: private skip_flags = -Wrustdoc::unescaped_backticks 110rustdoc-core: private rustc_target_flags = $(core-cfgs) 111rustdoc-core: $(RUST_LIB_SRC)/core/src/lib.rs FORCE 112 +$(call if_changed,rustdoc) 113 114rustdoc-compiler_builtins: $(src)/compiler_builtins.rs rustdoc-core FORCE 115 +$(call if_changed,rustdoc) 116 117rustdoc-ffi: $(src)/ffi.rs rustdoc-core FORCE 118 +$(call if_changed,rustdoc) 119 120rustdoc-pin_init_internal: private rustdoc_host = yes 121rustdoc-pin_init_internal: private rustc_target_flags = --cfg kernel \ 122 --extern proc_macro --crate-type proc-macro 123rustdoc-pin_init_internal: $(src)/pin-init/internal/src/lib.rs FORCE 124 +$(call if_changed,rustdoc) 125 126rustdoc-pin_init: private rustdoc_host = yes 127rustdoc-pin_init: private rustc_target_flags = --extern pin_init_internal \ 128 --extern macros --extern alloc --cfg kernel --cfg feature=\"alloc\" 129rustdoc-pin_init: $(src)/pin-init/src/lib.rs rustdoc-pin_init_internal \ 130 rustdoc-macros FORCE 131 +$(call if_changed,rustdoc) 132 133rustdoc-kernel: private rustc_target_flags = --extern ffi --extern pin_init \ 134 --extern build_error --extern macros \ 135 --extern bindings --extern uapi 136rustdoc-kernel: $(src)/kernel/lib.rs rustdoc-core rustdoc-ffi rustdoc-macros \ 137 rustdoc-pin_init rustdoc-compiler_builtins $(obj)/$(libmacros_name) \ 138 $(obj)/bindings.o FORCE 139 +$(call if_changed,rustdoc) 140 141quiet_cmd_rustc_test_library = $(RUSTC_OR_CLIPPY_QUIET) TL $< 142 cmd_rustc_test_library = \ 143 OBJTREE=$(abspath $(objtree)) \ 144 $(RUSTC_OR_CLIPPY) $(rust_common_flags) \ 145 @$(objtree)/include/generated/rustc_cfg $(rustc_target_flags) \ 146 --crate-type $(if $(rustc_test_library_proc),proc-macro,rlib) \ 147 --out-dir $(objtree)/$(obj)/test --cfg testlib \ 148 -L$(objtree)/$(obj)/test \ 149 --crate-name $(subst rusttest-,,$(subst rusttestlib-,,$@)) $< 150 151rusttestlib-build_error: $(src)/build_error.rs FORCE 152 +$(call if_changed,rustc_test_library) 153 154rusttestlib-ffi: $(src)/ffi.rs FORCE 155 +$(call if_changed,rustc_test_library) 156 157rusttestlib-macros: private rustc_target_flags = --extern proc_macro 158rusttestlib-macros: private rustc_test_library_proc = yes 159rusttestlib-macros: $(src)/macros/lib.rs FORCE 160 +$(call if_changed,rustc_test_library) 161 162rusttestlib-pin_init_internal: private rustc_target_flags = --cfg kernel \ 163 --extern proc_macro 164rusttestlib-pin_init_internal: private rustc_test_library_proc = yes 165rusttestlib-pin_init_internal: $(src)/pin-init/internal/src/lib.rs FORCE 166 +$(call if_changed,rustc_test_library) 167 168rusttestlib-pin_init: private rustc_target_flags = --extern pin_init_internal \ 169 --extern macros --cfg kernel 170rusttestlib-pin_init: $(src)/pin-init/src/lib.rs rusttestlib-macros \ 171 rusttestlib-pin_init_internal $(obj)/$(libpin_init_internal_name) FORCE 172 +$(call if_changed,rustc_test_library) 173 174rusttestlib-kernel: private rustc_target_flags = --extern ffi \ 175 --extern build_error --extern macros --extern pin_init \ 176 --extern bindings --extern uapi 177rusttestlib-kernel: $(src)/kernel/lib.rs rusttestlib-bindings rusttestlib-uapi \ 178 rusttestlib-build_error rusttestlib-pin_init $(obj)/$(libmacros_name) \ 179 $(obj)/bindings.o FORCE 180 +$(call if_changed,rustc_test_library) 181 182rusttestlib-bindings: private rustc_target_flags = --extern ffi 183rusttestlib-bindings: $(src)/bindings/lib.rs rusttestlib-ffi FORCE 184 +$(call if_changed,rustc_test_library) 185 186rusttestlib-uapi: private rustc_target_flags = --extern ffi 187rusttestlib-uapi: $(src)/uapi/lib.rs rusttestlib-ffi FORCE 188 +$(call if_changed,rustc_test_library) 189 190quiet_cmd_rustdoc_test = RUSTDOC T $< 191 cmd_rustdoc_test = \ 192 RUST_MODFILE=test.rs \ 193 OBJTREE=$(abspath $(objtree)) \ 194 $(RUSTDOC) --test $(rust_common_flags) \ 195 @$(objtree)/include/generated/rustc_cfg \ 196 $(rustc_target_flags) $(rustdoc_test_target_flags) \ 197 $(rustdoc_test_quiet) \ 198 -L$(objtree)/$(obj)/test --output $(rustdoc_output) \ 199 --crate-name $(subst rusttest-,,$@) $< 200 201quiet_cmd_rustdoc_test_kernel = RUSTDOC TK $< 202 cmd_rustdoc_test_kernel = \ 203 rm -rf $(objtree)/$(obj)/test/doctests/kernel; \ 204 mkdir -p $(objtree)/$(obj)/test/doctests/kernel; \ 205 OBJTREE=$(abspath $(objtree)) \ 206 $(RUSTDOC) --test $(filter-out --remap-path-prefix=%,$(rust_flags)) \ 207 -L$(objtree)/$(obj) --extern ffi --extern pin_init \ 208 --extern kernel --extern build_error --extern macros \ 209 --extern bindings --extern uapi \ 210 --no-run --crate-name kernel -Zunstable-options \ 211 --sysroot=/dev/null \ 212 --test-builder $(objtree)/scripts/rustdoc_test_builder \ 213 $< $(rustdoc_test_kernel_quiet); \ 214 $(objtree)/scripts/rustdoc_test_gen 215 216%/doctests_kernel_generated.rs %/doctests_kernel_generated_kunit.c: \ 217 $(src)/kernel/lib.rs $(obj)/kernel.o \ 218 $(objtree)/scripts/rustdoc_test_builder \ 219 $(objtree)/scripts/rustdoc_test_gen FORCE 220 +$(call if_changed,rustdoc_test_kernel) 221 222# We cannot use `-Zpanic-abort-tests` because some tests are dynamic, 223# so for the moment we skip `-Cpanic=abort`. 224quiet_cmd_rustc_test = $(RUSTC_OR_CLIPPY_QUIET) T $< 225 cmd_rustc_test = \ 226 OBJTREE=$(abspath $(objtree)) \ 227 $(RUSTC_OR_CLIPPY) --test $(rust_common_flags) \ 228 @$(objtree)/include/generated/rustc_cfg \ 229 $(rustc_target_flags) --out-dir $(objtree)/$(obj)/test \ 230 -L$(objtree)/$(obj)/test \ 231 --crate-name $(subst rusttest-,,$@) $<; \ 232 $(objtree)/$(obj)/test/$(subst rusttest-,,$@) $(rust_test_quiet) \ 233 $(rustc_test_run_flags) 234 235rusttest: rusttest-macros rusttest-kernel 236 237rusttest-macros: private rustc_target_flags = --extern proc_macro \ 238 --extern macros --extern kernel --extern pin_init 239rusttest-macros: private rustdoc_test_target_flags = --crate-type proc-macro 240rusttest-macros: $(src)/macros/lib.rs \ 241 rusttestlib-macros rusttestlib-kernel rusttestlib-pin_init FORCE 242 +$(call if_changed,rustc_test) 243 +$(call if_changed,rustdoc_test) 244 245rusttest-kernel: private rustc_target_flags = --extern ffi --extern pin_init \ 246 --extern build_error --extern macros --extern bindings --extern uapi 247rusttest-kernel: $(src)/kernel/lib.rs rusttestlib-ffi rusttestlib-kernel \ 248 rusttestlib-build_error rusttestlib-macros rusttestlib-bindings \ 249 rusttestlib-uapi rusttestlib-pin_init FORCE 250 +$(call if_changed,rustc_test) 251 252ifdef CONFIG_CC_IS_CLANG 253bindgen_c_flags = $(c_flags) 254else 255# bindgen relies on libclang to parse C. Ideally, bindgen would support a GCC 256# plugin backend and/or the Clang driver would be perfectly compatible with GCC. 257# 258# For the moment, here we are tweaking the flags on the fly. This is a hack, 259# and some kernel configurations may not work (e.g. `GCC_PLUGIN_RANDSTRUCT` 260# if we end up using one of those structs). 261bindgen_skip_c_flags := -mno-fp-ret-in-387 -mpreferred-stack-boundary=% \ 262 -mskip-rax-setup -mgeneral-regs-only -msign-return-address=% \ 263 -mindirect-branch=thunk-extern -mindirect-branch-register \ 264 -mfunction-return=thunk-extern -mrecord-mcount -mabi=lp64 \ 265 -mindirect-branch-cs-prefix -mstack-protector-guard% -mtraceback=no \ 266 -mno-pointers-to-nested-functions -mno-string \ 267 -mno-strict-align -mstrict-align -mdirect-extern-access \ 268 -mexplicit-relocs -mno-check-zero-division \ 269 -fconserve-stack -falign-jumps=% -falign-loops=% \ 270 -femit-struct-debug-baseonly -fno-ipa-cp-clone -fno-ipa-sra \ 271 -fno-partial-inlining -fplugin-arg-arm_ssp_per_task_plugin-% \ 272 -fno-reorder-blocks -fno-allow-store-data-races -fasan-shadow-offset=% \ 273 -fzero-call-used-regs=% -fno-stack-clash-protection \ 274 -fno-inline-functions-called-once -fsanitize=bounds-strict \ 275 -fstrict-flex-arrays=% -fmin-function-alignment=% \ 276 -fzero-init-padding-bits=% \ 277 --param=% --param asan-% 278 279# Derived from `scripts/Makefile.clang`. 280BINDGEN_TARGET_x86 := x86_64-linux-gnu 281BINDGEN_TARGET_arm64 := aarch64-linux-gnu 282BINDGEN_TARGET_arm := arm-linux-gnueabi 283BINDGEN_TARGET_loongarch := loongarch64-linux-gnusf 284BINDGEN_TARGET_um := $(BINDGEN_TARGET_$(SUBARCH)) 285BINDGEN_TARGET := $(BINDGEN_TARGET_$(SRCARCH)) 286 287# All warnings are inhibited since GCC builds are very experimental, 288# many GCC warnings are not supported by Clang, they may only appear in 289# some configurations, with new GCC versions, etc. 290bindgen_extra_c_flags = -w --target=$(BINDGEN_TARGET) 291 292# Auto variable zero-initialization requires an additional special option with 293# clang that is going to be removed sometime in the future (likely in 294# clang-18), so make sure to pass this option only if clang supports it 295# (libclang major version < 16). 296# 297# https://github.com/llvm/llvm-project/issues/44842 298# https://github.com/llvm/llvm-project/blob/llvmorg-16.0.0-rc2/clang/docs/ReleaseNotes.rst#deprecated-compiler-flags 299ifdef CONFIG_INIT_STACK_ALL_ZERO 300libclang_maj_ver=$(shell $(BINDGEN) $(srctree)/scripts/rust_is_available_bindgen_libclang.h 2>&1 | sed -ne 's/.*clang version \([0-9]*\).*/\1/p') 301ifeq ($(shell expr $(libclang_maj_ver) \< 16), 1) 302bindgen_extra_c_flags += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang 303endif 304endif 305 306bindgen_c_flags = $(filter-out $(bindgen_skip_c_flags), $(c_flags)) \ 307 $(bindgen_extra_c_flags) 308endif 309 310ifdef CONFIG_LTO 311bindgen_c_flags_lto = $(filter-out $(CC_FLAGS_LTO), $(bindgen_c_flags)) 312else 313bindgen_c_flags_lto = $(bindgen_c_flags) 314endif 315 316# `-fno-builtin` is passed to avoid `bindgen` from using `clang` builtin 317# prototypes for functions like `memcpy` -- if this flag is not passed, 318# `bindgen`-generated prototypes use `c_ulong` or `c_uint` depending on 319# architecture instead of generating `usize`. 320bindgen_c_flags_final = $(bindgen_c_flags_lto) -fno-builtin -D__BINDGEN__ 321 322# Each `bindgen` release may upgrade the list of Rust target versions. By 323# default, the highest stable release in their list is used. Thus we need to set 324# a `--rust-target` to avoid future `bindgen` releases emitting code that 325# `rustc` may not understand. On top of that, `bindgen` does not support passing 326# an unknown Rust target version. 327# 328# Therefore, the Rust target for `bindgen` can be only as high as the minimum 329# Rust version the kernel supports and only as high as the greatest stable Rust 330# target supported by the minimum `bindgen` version the kernel supports (that 331# is, if we do not test the actual `rustc`/`bindgen` versions running). 332# 333# Starting with `bindgen` 0.71.0, we will be able to set any future Rust version 334# instead, i.e. we will be able to set here our minimum supported Rust version. 335quiet_cmd_bindgen = BINDGEN $@ 336 cmd_bindgen = \ 337 $(BINDGEN) $< $(bindgen_target_flags) --rust-target 1.68 \ 338 --use-core --with-derive-default --ctypes-prefix ffi --no-layout-tests \ 339 --no-debug '.*' --enable-function-attribute-detection \ 340 -o $@ -- $(bindgen_c_flags_final) -DMODULE \ 341 $(bindgen_target_cflags) $(bindgen_target_extra) 342 343$(obj)/bindings/bindings_generated.rs: private bindgen_target_flags = \ 344 $(shell grep -Ev '^#|^$$' $(src)/bindgen_parameters) 345$(obj)/bindings/bindings_generated.rs: private bindgen_target_extra = ; \ 346 sed -Ei 's/pub const RUST_CONST_HELPER_([a-zA-Z0-9_]*)/pub const \1/g' $@ 347$(obj)/bindings/bindings_generated.rs: $(src)/bindings/bindings_helper.h \ 348 $(src)/bindgen_parameters FORCE 349 $(call if_changed_dep,bindgen) 350 351$(obj)/uapi/uapi_generated.rs: private bindgen_target_flags = \ 352 $(shell grep -Ev '^#|^$$' $(src)/bindgen_parameters) 353$(obj)/uapi/uapi_generated.rs: $(src)/uapi/uapi_helper.h \ 354 $(src)/bindgen_parameters FORCE 355 $(call if_changed_dep,bindgen) 356 357# See `CFLAGS_REMOVE_helpers.o` above. In addition, Clang on C does not warn 358# with `-Wmissing-declarations` (unlike GCC), so it is not strictly needed here 359# given it is `libclang`; but for consistency, future Clang changes and/or 360# a potential future GCC backend for `bindgen`, we disable it too. 361$(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_flags = \ 362 --blocklist-type '.*' --allowlist-var '' \ 363 --allowlist-function 'rust_helper_.*' 364$(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_cflags = \ 365 -I$(objtree)/$(obj) -Wno-missing-prototypes -Wno-missing-declarations 366$(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_extra = ; \ 367 sed -Ei 's/pub fn rust_helper_([a-zA-Z0-9_]*)/#[link_name="rust_helper_\1"]\n pub fn \1/g' $@ 368$(obj)/bindings/bindings_helpers_generated.rs: $(src)/helpers/helpers.c FORCE 369 $(call if_changed_dep,bindgen) 370 371rust_exports = $(NM) -p --defined-only $(1) | awk '$$2~/(T|R|D|B)/ && $$3!~/__cfi/ && $$3!~/__odr_asan/ { printf $(2),$$3 }' 372 373quiet_cmd_exports = EXPORTS $@ 374 cmd_exports = \ 375 $(call rust_exports,$<,"EXPORT_SYMBOL_RUST_GPL(%s);\n") > $@ 376 377$(obj)/exports_core_generated.h: $(obj)/core.o FORCE 378 $(call if_changed,exports) 379 380# Even though Rust kernel modules should never use the bindings directly, 381# symbols from the `bindings` crate and the C helpers need to be exported 382# because Rust generics and inlined functions may not get their code generated 383# in the crate where they are defined. Other helpers, called from non-inline 384# functions, may not be exported, in principle. However, in general, the Rust 385# compiler does not guarantee codegen will be performed for a non-inline 386# function either. Therefore, we export all symbols from helpers and bindings. 387# In the future, this may be revisited to reduce the number of exports after 388# the compiler is informed about the places codegen is required. 389$(obj)/exports_helpers_generated.h: $(obj)/helpers/helpers.o FORCE 390 $(call if_changed,exports) 391 392$(obj)/exports_bindings_generated.h: $(obj)/bindings.o FORCE 393 $(call if_changed,exports) 394 395$(obj)/exports_kernel_generated.h: $(obj)/kernel.o FORCE 396 $(call if_changed,exports) 397 398quiet_cmd_rustc_procmacro = $(RUSTC_OR_CLIPPY_QUIET) P $@ 399 cmd_rustc_procmacro = \ 400 $(RUSTC_OR_CLIPPY) $(rust_common_flags) $(rustc_target_flags) \ 401 -Clinker-flavor=gcc -Clinker=$(HOSTCC) \ 402 -Clink-args='$(call escsq,$(KBUILD_PROCMACROLDFLAGS))' \ 403 --emit=dep-info=$(depfile) --emit=link=$@ --extern proc_macro \ 404 --crate-type proc-macro \ 405 --crate-name $(patsubst lib%.$(libmacros_extension),%,$(notdir $@)) $< 406 407# Procedural macros can only be used with the `rustc` that compiled it. 408$(obj)/$(libmacros_name): $(src)/macros/lib.rs FORCE 409 +$(call if_changed_dep,rustc_procmacro) 410 411$(obj)/$(libpin_init_internal_name): private rustc_target_flags = --cfg kernel 412$(obj)/$(libpin_init_internal_name): $(src)/pin-init/internal/src/lib.rs FORCE 413 +$(call if_changed_dep,rustc_procmacro) 414 415quiet_cmd_rustc_library = $(if $(skip_clippy),RUSTC,$(RUSTC_OR_CLIPPY_QUIET)) L $@ 416 cmd_rustc_library = \ 417 OBJTREE=$(abspath $(objtree)) \ 418 $(if $(skip_clippy),$(RUSTC),$(RUSTC_OR_CLIPPY)) \ 419 $(filter-out $(skip_flags),$(rust_flags) $(rustc_target_flags)) \ 420 --emit=dep-info=$(depfile) --emit=obj=$@ \ 421 --emit=metadata=$(dir $@)$(patsubst %.o,lib%.rmeta,$(notdir $@)) \ 422 --crate-type rlib -L$(objtree)/$(obj) \ 423 --crate-name $(patsubst %.o,%,$(notdir $@)) $< \ 424 --sysroot=/dev/null \ 425 $(if $(rustc_objcopy),;$(OBJCOPY) $(rustc_objcopy) $@) \ 426 $(cmd_objtool) 427 428rust-analyzer: 429 $(Q)MAKEFLAGS= $(srctree)/scripts/generate_rust_analyzer.py \ 430 --cfgs='core=$(core-cfgs)' \ 431 $(realpath $(srctree)) $(realpath $(objtree)) \ 432 $(rustc_sysroot) $(RUST_LIB_SRC) $(if $(KBUILD_EXTMOD),$(srcroot)) \ 433 > rust-project.json 434 435redirect-intrinsics = \ 436 __addsf3 __eqsf2 __extendsfdf2 __gesf2 __lesf2 __ltsf2 __mulsf3 __nesf2 __truncdfsf2 __unordsf2 \ 437 __adddf3 __eqdf2 __ledf2 __ltdf2 __muldf3 __unorddf2 \ 438 __muloti4 __multi3 \ 439 __udivmodti4 __udivti3 __umodti3 440 441ifdef CONFIG_ARM 442 # Add eabi initrinsics for ARM 32-bit 443 redirect-intrinsics += \ 444 __aeabi_fadd __aeabi_fmul __aeabi_fcmpeq __aeabi_fcmple __aeabi_fcmplt __aeabi_fcmpun \ 445 __aeabi_dadd __aeabi_dmul __aeabi_dcmple __aeabi_dcmplt __aeabi_dcmpun \ 446 __aeabi_uldivmod 447endif 448ifneq ($(or $(CONFIG_ARM64),$(and $(CONFIG_RISCV),$(CONFIG_64BIT))),) 449 # These intrinsics are defined for ARM64 and RISCV64 450 redirect-intrinsics += \ 451 __ashrti3 \ 452 __ashlti3 __lshrti3 453endif 454 455ifdef CONFIG_MODVERSIONS 456cmd_gendwarfksyms = $(if $(skip_gendwarfksyms),, \ 457 $(call rust_exports,$@,"%s\n") | \ 458 scripts/gendwarfksyms/gendwarfksyms \ 459 $(if $(KBUILD_GENDWARFKSYMS_STABLE), --stable) \ 460 $(if $(KBUILD_SYMTYPES), --symtypes $(@:.o=.symtypes),) \ 461 $@ >> $(dot-target).cmd) 462endif 463 464define rule_rustc_library 465 $(call cmd_and_fixdep,rustc_library) 466 $(call cmd,gen_objtooldep) 467 $(call cmd,gendwarfksyms) 468endef 469 470define rule_rust_cc_library 471 $(call if_changed_rule,cc_o_c) 472 $(call cmd,force_checksrc) 473 $(call cmd,gendwarfksyms) 474endef 475 476# helpers.o uses the same export mechanism as Rust libraries, so ensure symbol 477# versions are calculated for the helpers too. 478$(obj)/helpers/helpers.o: $(src)/helpers/helpers.c $(recordmcount_source) FORCE 479 +$(call if_changed_rule,rust_cc_library) 480 481# Disable symbol versioning for exports.o to avoid conflicts with the actual 482# symbol versions generated from Rust objects. 483$(obj)/exports.o: private skip_gendwarfksyms = 1 484 485$(obj)/core.o: private skip_clippy = 1 486$(obj)/core.o: private skip_flags = -Wunreachable_pub 487$(obj)/core.o: private rustc_objcopy = $(foreach sym,$(redirect-intrinsics),--redefine-sym $(sym)=__rust$(sym)) 488$(obj)/core.o: private rustc_target_flags = $(core-cfgs) 489$(obj)/core.o: $(RUST_LIB_SRC)/core/src/lib.rs \ 490 $(wildcard $(objtree)/include/config/RUSTC_VERSION_TEXT) FORCE 491 +$(call if_changed_rule,rustc_library) 492ifneq ($(or $(CONFIG_X86_64),$(CONFIG_X86_32)),) 493$(obj)/core.o: scripts/target.json 494endif 495 496$(obj)/compiler_builtins.o: private skip_gendwarfksyms = 1 497$(obj)/compiler_builtins.o: private rustc_objcopy = -w -W '__*' 498$(obj)/compiler_builtins.o: $(src)/compiler_builtins.rs $(obj)/core.o FORCE 499 +$(call if_changed_rule,rustc_library) 500 501$(obj)/pin_init.o: private skip_gendwarfksyms = 1 502$(obj)/pin_init.o: private rustc_target_flags = --extern pin_init_internal \ 503 --extern macros --cfg kernel 504$(obj)/pin_init.o: $(src)/pin-init/src/lib.rs $(obj)/compiler_builtins.o \ 505 $(obj)/$(libpin_init_internal_name) $(obj)/$(libmacros_name) FORCE 506 +$(call if_changed_rule,rustc_library) 507 508$(obj)/build_error.o: private skip_gendwarfksyms = 1 509$(obj)/build_error.o: $(src)/build_error.rs $(obj)/compiler_builtins.o FORCE 510 +$(call if_changed_rule,rustc_library) 511 512$(obj)/ffi.o: private skip_gendwarfksyms = 1 513$(obj)/ffi.o: $(src)/ffi.rs $(obj)/compiler_builtins.o FORCE 514 +$(call if_changed_rule,rustc_library) 515 516$(obj)/bindings.o: private rustc_target_flags = --extern ffi 517$(obj)/bindings.o: $(src)/bindings/lib.rs \ 518 $(obj)/ffi.o \ 519 $(obj)/bindings/bindings_generated.rs \ 520 $(obj)/bindings/bindings_helpers_generated.rs FORCE 521 +$(call if_changed_rule,rustc_library) 522 523$(obj)/uapi.o: private rustc_target_flags = --extern ffi 524$(obj)/uapi.o: private skip_gendwarfksyms = 1 525$(obj)/uapi.o: $(src)/uapi/lib.rs \ 526 $(obj)/ffi.o \ 527 $(obj)/uapi/uapi_generated.rs FORCE 528 +$(call if_changed_rule,rustc_library) 529 530$(obj)/kernel.o: private rustc_target_flags = --extern ffi --extern pin_init \ 531 --extern build_error --extern macros --extern bindings --extern uapi 532$(obj)/kernel.o: $(src)/kernel/lib.rs $(obj)/build_error.o $(obj)/pin_init.o \ 533 $(obj)/$(libmacros_name) $(obj)/bindings.o $(obj)/uapi.o FORCE 534 +$(call if_changed_rule,rustc_library) 535 536ifdef CONFIG_JUMP_LABEL 537$(obj)/kernel.o: $(obj)/kernel/generated_arch_static_branch_asm.rs 538endif 539 540endif # CONFIG_RUST 541
