projects/linux·blob v6.14 · refs

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