Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
63core-edition := $(if $(call rustc-min-version,108700),2024,2021)
64
65# `rustc` recognizes `--remap-path-prefix` since 1.26.0, but `rustdoc` only
66# since Rust 1.81.0. Moreover, `rustdoc` ICEs on out-of-tree builds since Rust
67# 1.82.0 (https://github.com/rust-lang/rust/issues/138520). Thus workaround both
68# issues skipping the flag. The former also applies to `RUSTDOC TK`.
69quiet_cmd_rustdoc = RUSTDOC $(if $(rustdoc_host),H, ) $<
70 cmd_rustdoc = \
71 OBJTREE=$(abspath $(objtree)) \
72 $(RUSTDOC) $(filter-out $(skip_flags) --remap-path-prefix=%,$(if $(rustdoc_host),$(rust_common_flags),$(rust_flags))) \
73 $(rustc_target_flags) -L$(objtree)/$(obj) \
74 -Zunstable-options --generate-link-to-definition \
75 --output $(rustdoc_output) \
76 --crate-name $(subst rustdoc-,,$@) \
77 $(if $(rustdoc_host),,--sysroot=/dev/null) \
78 @$(objtree)/include/generated/rustc_cfg $<
79
80# The `html_logo_url` and `html_favicon_url` forms of the `doc` attribute
81# can be used to specify a custom logo. However:
82# - The given value is used as-is, thus it cannot be relative or a local file
83# (unlike the non-custom case) since the generated docs have subfolders.
84# - It requires adding it to every crate.
85# - It requires changing `core` which comes from the sysroot.
86#
87# Using `-Zcrate-attr` would solve the last two points, but not the first.
88# The https://github.com/rust-lang/rfcs/pull/3226 RFC suggests two new
89# command-like flags to solve the issue. Meanwhile, we use the non-custom case
90# and then retouch the generated files.
91rustdoc: rustdoc-core rustdoc-macros rustdoc-compiler_builtins \
92 rustdoc-kernel rustdoc-pin_init
93 $(Q)cp $(srctree)/Documentation/images/logo.svg $(rustdoc_output)/static.files/
94 $(Q)cp $(srctree)/Documentation/images/COPYING-logo $(rustdoc_output)/static.files/
95 $(Q)find $(rustdoc_output) -name '*.html' -type f -print0 | xargs -0 sed -Ei \
96 -e 's:rust-logo-[0-9a-f]+\.svg:logo.svg:g' \
97 -e 's:favicon-[0-9a-f]+\.svg:logo.svg:g' \
98 -e 's:<link rel="alternate icon" type="image/png" href="[/.]+/static\.files/favicon-(16x16|32x32)-[0-9a-f]+\.png">::g' \
99 -e 's:<a href="srctree/([^"]+)">:<a href="$(realpath $(srctree))/\1">:g'
100 $(Q)for f in $(rustdoc_output)/static.files/rustdoc-*.css; do \
101 echo ".logo-container > img { object-fit: contain; }" >> $$f; done
102
103rustdoc-macros: private rustdoc_host = yes
104rustdoc-macros: private rustc_target_flags = --crate-type proc-macro \
105 --extern proc_macro
106rustdoc-macros: $(src)/macros/lib.rs FORCE
107 +$(call if_changed,rustdoc)
108
109# Starting with Rust 1.82.0, skipping `-Wrustdoc::unescaped_backticks` should
110# not be needed -- see https://github.com/rust-lang/rust/pull/128307.
111rustdoc-core: private skip_flags = --edition=2021 -Wrustdoc::unescaped_backticks
112rustdoc-core: private rustc_target_flags = --edition=$(core-edition) $(core-cfgs)
113rustdoc-core: $(RUST_LIB_SRC)/core/src/lib.rs FORCE
114 +$(call if_changed,rustdoc)
115
116rustdoc-compiler_builtins: $(src)/compiler_builtins.rs rustdoc-core FORCE
117 +$(call if_changed,rustdoc)
118
119rustdoc-ffi: $(src)/ffi.rs rustdoc-core FORCE
120 +$(call if_changed,rustdoc)
121
122rustdoc-pin_init_internal: private rustdoc_host = yes
123rustdoc-pin_init_internal: private rustc_target_flags = --cfg kernel \
124 --extern proc_macro --crate-type proc-macro
125rustdoc-pin_init_internal: $(src)/pin-init/internal/src/lib.rs FORCE
126 +$(call if_changed,rustdoc)
127
128rustdoc-pin_init: private rustdoc_host = yes
129rustdoc-pin_init: private rustc_target_flags = --extern pin_init_internal \
130 --extern macros --extern alloc --cfg kernel --cfg feature=\"alloc\"
131rustdoc-pin_init: $(src)/pin-init/src/lib.rs rustdoc-pin_init_internal \
132 rustdoc-macros FORCE
133 +$(call if_changed,rustdoc)
134
135rustdoc-kernel: private rustc_target_flags = --extern ffi --extern pin_init \
136 --extern build_error --extern macros \
137 --extern bindings --extern uapi
138rustdoc-kernel: $(src)/kernel/lib.rs rustdoc-core rustdoc-ffi rustdoc-macros \
139 rustdoc-pin_init rustdoc-compiler_builtins $(obj)/$(libmacros_name) \
140 $(obj)/bindings.o FORCE
141 +$(call if_changed,rustdoc)
142
143quiet_cmd_rustc_test_library = $(RUSTC_OR_CLIPPY_QUIET) TL $<
144 cmd_rustc_test_library = \
145 OBJTREE=$(abspath $(objtree)) \
146 $(RUSTC_OR_CLIPPY) $(rust_common_flags) \
147 @$(objtree)/include/generated/rustc_cfg $(rustc_target_flags) \
148 --crate-type $(if $(rustc_test_library_proc),proc-macro,rlib) \
149 --out-dir $(objtree)/$(obj)/test --cfg testlib \
150 -L$(objtree)/$(obj)/test \
151 --crate-name $(subst rusttest-,,$(subst rusttestlib-,,$@)) $<
152
153rusttestlib-build_error: $(src)/build_error.rs FORCE
154 +$(call if_changed,rustc_test_library)
155
156rusttestlib-ffi: $(src)/ffi.rs FORCE
157 +$(call if_changed,rustc_test_library)
158
159rusttestlib-macros: private rustc_target_flags = --extern proc_macro
160rusttestlib-macros: private rustc_test_library_proc = yes
161rusttestlib-macros: $(src)/macros/lib.rs FORCE
162 +$(call if_changed,rustc_test_library)
163
164rusttestlib-pin_init_internal: private rustc_target_flags = --cfg kernel \
165 --extern proc_macro
166rusttestlib-pin_init_internal: private rustc_test_library_proc = yes
167rusttestlib-pin_init_internal: $(src)/pin-init/internal/src/lib.rs FORCE
168 +$(call if_changed,rustc_test_library)
169
170rusttestlib-pin_init: private rustc_target_flags = --extern pin_init_internal \
171 --extern macros --cfg kernel
172rusttestlib-pin_init: $(src)/pin-init/src/lib.rs rusttestlib-macros \
173 rusttestlib-pin_init_internal $(obj)/$(libpin_init_internal_name) FORCE
174 +$(call if_changed,rustc_test_library)
175
176rusttestlib-kernel: private rustc_target_flags = --extern ffi \
177 --extern build_error --extern macros --extern pin_init \
178 --extern bindings --extern uapi
179rusttestlib-kernel: $(src)/kernel/lib.rs rusttestlib-bindings rusttestlib-uapi \
180 rusttestlib-build_error rusttestlib-pin_init $(obj)/$(libmacros_name) \
181 $(obj)/bindings.o FORCE
182 +$(call if_changed,rustc_test_library)
183
184rusttestlib-bindings: private rustc_target_flags = --extern ffi
185rusttestlib-bindings: $(src)/bindings/lib.rs rusttestlib-ffi FORCE
186 +$(call if_changed,rustc_test_library)
187
188rusttestlib-uapi: private rustc_target_flags = --extern ffi
189rusttestlib-uapi: $(src)/uapi/lib.rs rusttestlib-ffi FORCE
190 +$(call if_changed,rustc_test_library)
191
192quiet_cmd_rustdoc_test = RUSTDOC T $<
193 cmd_rustdoc_test = \
194 RUST_MODFILE=test.rs \
195 OBJTREE=$(abspath $(objtree)) \
196 $(RUSTDOC) --test $(rust_common_flags) \
197 @$(objtree)/include/generated/rustc_cfg \
198 $(rustc_target_flags) $(rustdoc_test_target_flags) \
199 $(rustdoc_test_quiet) \
200 -L$(objtree)/$(obj)/test --output $(rustdoc_output) \
201 --crate-name $(subst rusttest-,,$@) $<
202
203quiet_cmd_rustdoc_test_kernel = RUSTDOC TK $<
204 cmd_rustdoc_test_kernel = \
205 rm -rf $(objtree)/$(obj)/test/doctests/kernel; \
206 mkdir -p $(objtree)/$(obj)/test/doctests/kernel; \
207 OBJTREE=$(abspath $(objtree)) \
208 $(RUSTDOC) --test $(filter-out --remap-path-prefix=%,$(rust_flags)) \
209 -L$(objtree)/$(obj) --extern ffi --extern pin_init \
210 --extern kernel --extern build_error --extern macros \
211 --extern bindings --extern uapi \
212 --no-run --crate-name kernel -Zunstable-options \
213 --sysroot=/dev/null \
214 --test-builder $(objtree)/scripts/rustdoc_test_builder \
215 $< $(rustdoc_test_kernel_quiet); \
216 $(objtree)/scripts/rustdoc_test_gen
217
218%/doctests_kernel_generated.rs %/doctests_kernel_generated_kunit.c: \
219 $(src)/kernel/lib.rs $(obj)/kernel.o \
220 $(objtree)/scripts/rustdoc_test_builder \
221 $(objtree)/scripts/rustdoc_test_gen FORCE
222 +$(call if_changed,rustdoc_test_kernel)
223
224# We cannot use `-Zpanic-abort-tests` because some tests are dynamic,
225# so for the moment we skip `-Cpanic=abort`.
226quiet_cmd_rustc_test = $(RUSTC_OR_CLIPPY_QUIET) T $<
227 cmd_rustc_test = \
228 OBJTREE=$(abspath $(objtree)) \
229 $(RUSTC_OR_CLIPPY) --test $(rust_common_flags) \
230 @$(objtree)/include/generated/rustc_cfg \
231 $(rustc_target_flags) --out-dir $(objtree)/$(obj)/test \
232 -L$(objtree)/$(obj)/test \
233 --crate-name $(subst rusttest-,,$@) $<; \
234 $(objtree)/$(obj)/test/$(subst rusttest-,,$@) $(rust_test_quiet) \
235 $(rustc_test_run_flags)
236
237rusttest: rusttest-macros rusttest-kernel
238
239rusttest-macros: private rustc_target_flags = --extern proc_macro \
240 --extern macros --extern kernel --extern pin_init
241rusttest-macros: private rustdoc_test_target_flags = --crate-type proc-macro
242rusttest-macros: $(src)/macros/lib.rs \
243 rusttestlib-macros rusttestlib-kernel rusttestlib-pin_init FORCE
244 +$(call if_changed,rustc_test)
245 +$(call if_changed,rustdoc_test)
246
247rusttest-kernel: private rustc_target_flags = --extern ffi --extern pin_init \
248 --extern build_error --extern macros --extern bindings --extern uapi
249rusttest-kernel: $(src)/kernel/lib.rs rusttestlib-ffi rusttestlib-kernel \
250 rusttestlib-build_error rusttestlib-macros rusttestlib-bindings \
251 rusttestlib-uapi rusttestlib-pin_init FORCE
252 +$(call if_changed,rustc_test)
253
254ifdef CONFIG_CC_IS_CLANG
255bindgen_c_flags = $(c_flags)
256else
257# bindgen relies on libclang to parse C. Ideally, bindgen would support a GCC
258# plugin backend and/or the Clang driver would be perfectly compatible with GCC.
259#
260# For the moment, here we are tweaking the flags on the fly. This is a hack,
261# and some kernel configurations may not work (e.g. `GCC_PLUGIN_RANDSTRUCT`
262# if we end up using one of those structs).
263bindgen_skip_c_flags := -mno-fp-ret-in-387 -mpreferred-stack-boundary=% \
264 -mskip-rax-setup -mgeneral-regs-only -msign-return-address=% \
265 -mindirect-branch=thunk-extern -mindirect-branch-register \
266 -mfunction-return=thunk-extern -mrecord-mcount -mabi=lp64 \
267 -mindirect-branch-cs-prefix -mstack-protector-guard% -mtraceback=no \
268 -mno-pointers-to-nested-functions -mno-string \
269 -mno-strict-align -mstrict-align -mdirect-extern-access \
270 -mexplicit-relocs -mno-check-zero-division \
271 -fconserve-stack -falign-jumps=% -falign-loops=% \
272 -femit-struct-debug-baseonly -fno-ipa-cp-clone -fno-ipa-sra \
273 -fno-partial-inlining -fplugin-arg-arm_ssp_per_task_plugin-% \
274 -fno-reorder-blocks -fno-allow-store-data-races -fasan-shadow-offset=% \
275 -fzero-call-used-regs=% -fno-stack-clash-protection \
276 -fno-inline-functions-called-once -fsanitize=bounds-strict \
277 -fstrict-flex-arrays=% -fmin-function-alignment=% \
278 -fzero-init-padding-bits=% -mno-fdpic \
279 --param=% --param asan-%
280
281# Derived from `scripts/Makefile.clang`.
282BINDGEN_TARGET_x86 := x86_64-linux-gnu
283BINDGEN_TARGET_arm64 := aarch64-linux-gnu
284BINDGEN_TARGET_arm := arm-linux-gnueabi
285BINDGEN_TARGET_loongarch := loongarch64-linux-gnusf
286BINDGEN_TARGET_um := $(BINDGEN_TARGET_$(SUBARCH))
287BINDGEN_TARGET := $(BINDGEN_TARGET_$(SRCARCH))
288
289# All warnings are inhibited since GCC builds are very experimental,
290# many GCC warnings are not supported by Clang, they may only appear in
291# some configurations, with new GCC versions, etc.
292bindgen_extra_c_flags = -w --target=$(BINDGEN_TARGET)
293
294# Auto variable zero-initialization requires an additional special option with
295# clang that is going to be removed sometime in the future (likely in
296# clang-18), so make sure to pass this option only if clang supports it
297# (libclang major version < 16).
298#
299# https://github.com/llvm/llvm-project/issues/44842
300# https://github.com/llvm/llvm-project/blob/llvmorg-16.0.0-rc2/clang/docs/ReleaseNotes.rst#deprecated-compiler-flags
301ifdef CONFIG_INIT_STACK_ALL_ZERO
302libclang_maj_ver=$(shell $(BINDGEN) $(srctree)/scripts/rust_is_available_bindgen_libclang.h 2>&1 | sed -ne 's/.*clang version \([0-9]*\).*/\1/p')
303ifeq ($(shell expr $(libclang_maj_ver) \< 16), 1)
304bindgen_extra_c_flags += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang
305endif
306endif
307
308bindgen_c_flags = $(filter-out $(bindgen_skip_c_flags), $(c_flags)) \
309 $(bindgen_extra_c_flags)
310endif
311
312ifdef CONFIG_LTO
313bindgen_c_flags_lto = $(filter-out $(CC_FLAGS_LTO), $(bindgen_c_flags))
314else
315bindgen_c_flags_lto = $(bindgen_c_flags)
316endif
317
318# `-fno-builtin` is passed to avoid `bindgen` from using `clang` builtin
319# prototypes for functions like `memcpy` -- if this flag is not passed,
320# `bindgen`-generated prototypes use `c_ulong` or `c_uint` depending on
321# architecture instead of generating `usize`.
322bindgen_c_flags_final = $(bindgen_c_flags_lto) -fno-builtin -D__BINDGEN__
323
324# Each `bindgen` release may upgrade the list of Rust target versions. By
325# default, the highest stable release in their list is used. Thus we need to set
326# a `--rust-target` to avoid future `bindgen` releases emitting code that
327# `rustc` may not understand. On top of that, `bindgen` does not support passing
328# an unknown Rust target version.
329#
330# Therefore, the Rust target for `bindgen` can be only as high as the minimum
331# Rust version the kernel supports and only as high as the greatest stable Rust
332# target supported by the minimum `bindgen` version the kernel supports (that
333# is, if we do not test the actual `rustc`/`bindgen` versions running).
334#
335# Starting with `bindgen` 0.71.0, we will be able to set any future Rust version
336# instead, i.e. we will be able to set here our minimum supported Rust version.
337quiet_cmd_bindgen = BINDGEN $@
338 cmd_bindgen = \
339 $(BINDGEN) $< $(bindgen_target_flags) --rust-target 1.68 \
340 --use-core --with-derive-default --ctypes-prefix ffi --no-layout-tests \
341 --no-debug '.*' --enable-function-attribute-detection \
342 -o $@ -- $(bindgen_c_flags_final) -DMODULE \
343 $(bindgen_target_cflags) $(bindgen_target_extra)
344
345$(obj)/bindings/bindings_generated.rs: private bindgen_target_flags = \
346 $(shell grep -Ev '^#|^$$' $(src)/bindgen_parameters)
347$(obj)/bindings/bindings_generated.rs: private bindgen_target_extra = ; \
348 sed -Ei 's/pub const RUST_CONST_HELPER_([a-zA-Z0-9_]*)/pub const \1/g' $@
349$(obj)/bindings/bindings_generated.rs: $(src)/bindings/bindings_helper.h \
350 $(src)/bindgen_parameters FORCE
351 $(call if_changed_dep,bindgen)
352
353$(obj)/uapi/uapi_generated.rs: private bindgen_target_flags = \
354 $(shell grep -Ev '^#|^$$' $(src)/bindgen_parameters)
355$(obj)/uapi/uapi_generated.rs: $(src)/uapi/uapi_helper.h \
356 $(src)/bindgen_parameters FORCE
357 $(call if_changed_dep,bindgen)
358
359# See `CFLAGS_REMOVE_helpers.o` above. In addition, Clang on C does not warn
360# with `-Wmissing-declarations` (unlike GCC), so it is not strictly needed here
361# given it is `libclang`; but for consistency, future Clang changes and/or
362# a potential future GCC backend for `bindgen`, we disable it too.
363$(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_flags = \
364 --blocklist-type '.*' --allowlist-var '' \
365 --allowlist-function 'rust_helper_.*'
366$(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_cflags = \
367 -I$(objtree)/$(obj) -Wno-missing-prototypes -Wno-missing-declarations
368$(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_extra = ; \
369 sed -Ei 's/pub fn rust_helper_([a-zA-Z0-9_]*)/#[link_name="rust_helper_\1"]\n pub fn \1/g' $@
370$(obj)/bindings/bindings_helpers_generated.rs: $(src)/helpers/helpers.c FORCE
371 $(call if_changed_dep,bindgen)
372
373rust_exports = $(NM) -p --defined-only $(1) | awk '$$2~/(T|R|D|B)/ && $$3!~/__(pfx|cfi|odr_asan)/ { printf $(2),$$3 }'
374
375quiet_cmd_exports = EXPORTS $@
376 cmd_exports = \
377 $(call rust_exports,$<,"EXPORT_SYMBOL_RUST_GPL(%s);\n") > $@
378
379$(obj)/exports_core_generated.h: $(obj)/core.o FORCE
380 $(call if_changed,exports)
381
382# Even though Rust kernel modules should never use the bindings directly,
383# symbols from the `bindings` crate and the C helpers need to be exported
384# because Rust generics and inlined functions may not get their code generated
385# in the crate where they are defined. Other helpers, called from non-inline
386# functions, may not be exported, in principle. However, in general, the Rust
387# compiler does not guarantee codegen will be performed for a non-inline
388# function either. Therefore, we export all symbols from helpers and bindings.
389# In the future, this may be revisited to reduce the number of exports after
390# the compiler is informed about the places codegen is required.
391$(obj)/exports_helpers_generated.h: $(obj)/helpers/helpers.o FORCE
392 $(call if_changed,exports)
393
394$(obj)/exports_bindings_generated.h: $(obj)/bindings.o FORCE
395 $(call if_changed,exports)
396
397$(obj)/exports_kernel_generated.h: $(obj)/kernel.o FORCE
398 $(call if_changed,exports)
399
400quiet_cmd_rustc_procmacro = $(RUSTC_OR_CLIPPY_QUIET) P $@
401 cmd_rustc_procmacro = \
402 $(RUSTC_OR_CLIPPY) $(rust_common_flags) $(rustc_target_flags) \
403 -Clinker-flavor=gcc -Clinker=$(HOSTCC) \
404 -Clink-args='$(call escsq,$(KBUILD_PROCMACROLDFLAGS))' \
405 --emit=dep-info=$(depfile) --emit=link=$@ --extern proc_macro \
406 --crate-type proc-macro \
407 --crate-name $(patsubst lib%.$(libmacros_extension),%,$(notdir $@)) \
408 @$(objtree)/include/generated/rustc_cfg $<
409
410# Procedural macros can only be used with the `rustc` that compiled it.
411$(obj)/$(libmacros_name): $(src)/macros/lib.rs FORCE
412 +$(call if_changed_dep,rustc_procmacro)
413
414$(obj)/$(libpin_init_internal_name): private rustc_target_flags = --cfg kernel
415$(obj)/$(libpin_init_internal_name): $(src)/pin-init/internal/src/lib.rs FORCE
416 +$(call if_changed_dep,rustc_procmacro)
417
418quiet_cmd_rustc_library = $(if $(skip_clippy),RUSTC,$(RUSTC_OR_CLIPPY_QUIET)) L $@
419 cmd_rustc_library = \
420 OBJTREE=$(abspath $(objtree)) \
421 $(if $(skip_clippy),$(RUSTC),$(RUSTC_OR_CLIPPY)) \
422 $(filter-out $(skip_flags),$(rust_flags)) $(rustc_target_flags) \
423 --emit=dep-info=$(depfile) --emit=obj=$@ \
424 --emit=metadata=$(dir $@)$(patsubst %.o,lib%.rmeta,$(notdir $@)) \
425 --crate-type rlib -L$(objtree)/$(obj) \
426 --crate-name $(patsubst %.o,%,$(notdir $@)) $< \
427 --sysroot=/dev/null \
428 $(if $(rustc_objcopy),;$(OBJCOPY) $(rustc_objcopy) $@) \
429 $(cmd_objtool)
430
431rust-analyzer:
432 $(Q)MAKEFLAGS= $(srctree)/scripts/generate_rust_analyzer.py \
433 --cfgs='core=$(core-cfgs)' $(core-edition) \
434 $(realpath $(srctree)) $(realpath $(objtree)) \
435 $(rustc_sysroot) $(RUST_LIB_SRC) $(if $(KBUILD_EXTMOD),$(srcroot)) \
436 > rust-project.json
437
438redirect-intrinsics = \
439 __addsf3 __eqsf2 __extendsfdf2 __gesf2 __lesf2 __ltsf2 __mulsf3 __nesf2 __truncdfsf2 __unordsf2 \
440 __adddf3 __eqdf2 __ledf2 __ltdf2 __muldf3 __unorddf2 \
441 __muloti4 __multi3 \
442 __udivmodti4 __udivti3 __umodti3
443
444ifdef CONFIG_ARM
445 # Add eabi initrinsics for ARM 32-bit
446 redirect-intrinsics += \
447 __aeabi_fadd __aeabi_fmul __aeabi_fcmpeq __aeabi_fcmple __aeabi_fcmplt __aeabi_fcmpun \
448 __aeabi_dadd __aeabi_dmul __aeabi_dcmple __aeabi_dcmplt __aeabi_dcmpun \
449 __aeabi_uldivmod
450endif
451ifneq ($(or $(CONFIG_ARM64),$(and $(CONFIG_RISCV),$(CONFIG_64BIT))),)
452 # These intrinsics are defined for ARM64 and RISCV64
453 redirect-intrinsics += \
454 __ashrti3 \
455 __ashlti3 __lshrti3
456endif
457
458ifdef CONFIG_MODVERSIONS
459cmd_gendwarfksyms = $(if $(skip_gendwarfksyms),, \
460 $(call rust_exports,$@,"%s\n") | \
461 scripts/gendwarfksyms/gendwarfksyms \
462 $(if $(KBUILD_GENDWARFKSYMS_STABLE), --stable) \
463 $(if $(KBUILD_SYMTYPES), --symtypes $(@:.o=.symtypes),) \
464 $@ >> $(dot-target).cmd)
465endif
466
467define rule_rustc_library
468 $(call cmd_and_fixdep,rustc_library)
469 $(call cmd,gen_objtooldep)
470 $(call cmd,gendwarfksyms)
471endef
472
473define rule_rust_cc_library
474 $(call if_changed_rule,cc_o_c)
475 $(call cmd,force_checksrc)
476 $(call cmd,gendwarfksyms)
477endef
478
479# helpers.o uses the same export mechanism as Rust libraries, so ensure symbol
480# versions are calculated for the helpers too.
481$(obj)/helpers/helpers.o: $(src)/helpers/helpers.c $(recordmcount_source) FORCE
482 +$(call if_changed_rule,rust_cc_library)
483
484# Disable symbol versioning for exports.o to avoid conflicts with the actual
485# symbol versions generated from Rust objects.
486$(obj)/exports.o: private skip_gendwarfksyms = 1
487
488$(obj)/core.o: private skip_clippy = 1
489$(obj)/core.o: private skip_flags = --edition=2021 -Wunreachable_pub
490$(obj)/core.o: private rustc_objcopy = $(foreach sym,$(redirect-intrinsics),--redefine-sym $(sym)=__rust$(sym))
491$(obj)/core.o: private rustc_target_flags = --edition=$(core-edition) $(core-cfgs)
492$(obj)/core.o: $(RUST_LIB_SRC)/core/src/lib.rs \
493 $(wildcard $(objtree)/include/config/RUSTC_VERSION_TEXT) FORCE
494 +$(call if_changed_rule,rustc_library)
495ifneq ($(or $(CONFIG_X86_64),$(CONFIG_X86_32)),)
496$(obj)/core.o: scripts/target.json
497endif
498KCOV_INSTRUMENT_core.o := n
499
500$(obj)/compiler_builtins.o: private skip_gendwarfksyms = 1
501$(obj)/compiler_builtins.o: private rustc_objcopy = -w -W '__*'
502$(obj)/compiler_builtins.o: $(src)/compiler_builtins.rs $(obj)/core.o FORCE
503 +$(call if_changed_rule,rustc_library)
504
505$(obj)/pin_init.o: private skip_gendwarfksyms = 1
506$(obj)/pin_init.o: private rustc_target_flags = --extern pin_init_internal \
507 --extern macros --cfg kernel
508$(obj)/pin_init.o: $(src)/pin-init/src/lib.rs $(obj)/compiler_builtins.o \
509 $(obj)/$(libpin_init_internal_name) $(obj)/$(libmacros_name) FORCE
510 +$(call if_changed_rule,rustc_library)
511
512$(obj)/build_error.o: private skip_gendwarfksyms = 1
513$(obj)/build_error.o: $(src)/build_error.rs $(obj)/compiler_builtins.o FORCE
514 +$(call if_changed_rule,rustc_library)
515
516$(obj)/ffi.o: private skip_gendwarfksyms = 1
517$(obj)/ffi.o: $(src)/ffi.rs $(obj)/compiler_builtins.o FORCE
518 +$(call if_changed_rule,rustc_library)
519
520$(obj)/bindings.o: private rustc_target_flags = --extern ffi
521$(obj)/bindings.o: $(src)/bindings/lib.rs \
522 $(obj)/ffi.o \
523 $(obj)/bindings/bindings_generated.rs \
524 $(obj)/bindings/bindings_helpers_generated.rs FORCE
525 +$(call if_changed_rule,rustc_library)
526
527$(obj)/uapi.o: private rustc_target_flags = --extern ffi
528$(obj)/uapi.o: private skip_gendwarfksyms = 1
529$(obj)/uapi.o: $(src)/uapi/lib.rs \
530 $(obj)/ffi.o \
531 $(obj)/uapi/uapi_generated.rs FORCE
532 +$(call if_changed_rule,rustc_library)
533
534$(obj)/kernel.o: private rustc_target_flags = --extern ffi --extern pin_init \
535 --extern build_error --extern macros --extern bindings --extern uapi
536$(obj)/kernel.o: $(src)/kernel/lib.rs $(obj)/build_error.o $(obj)/pin_init.o \
537 $(obj)/$(libmacros_name) $(obj)/bindings.o $(obj)/uapi.o FORCE
538 +$(call if_changed_rule,rustc_library)
539
540ifdef CONFIG_JUMP_LABEL
541$(obj)/kernel.o: $(obj)/kernel/generated_arch_static_branch_asm.rs
542endif
543
544endif # CONFIG_RUST