x86/kprobes: Fix crash when probing CS CALL instructionsgrafted

When using eBPF to probe CS CALL instructions within a function,
a crash can be triggered.

The eBPF tool probes offset 257 of the __hrtimer_run_queues()
function:

<__hrtimer_run_queues+249>:  nopl   0x0(%rax,%rax,1)
<__hrtimer_run_queues+254>:  mov    %r14,%rdi
<__hrtimer_run_queues+257>:  cs call <__x86_indirect_thunk_r12>
<__hrtimer_run_queues+263>:  mov    %eax,%r12d
<__hrtimer_run_queues+266>:  xchg   %ax,%ax
<__hrtimer_run_queues+268>:  mov    %r13,%rdi

Which triggers this crash:

  BUG: unable to handle page fault for address: 00000000000f41c9
  #PF: supervisor write access in kernel mode
  #PF: error_code(0x0002) - not-present page
  PGD 0 P4D 0
  Oops: 0002 [#1] SMP NOPTI
  CPU: 1 PID: 0 Comm: swapper/1 Kdump: loaded Tainted: P
  RIP: 0010:__hrtimer_run_queues+0x106/0x230

Note that __hrtimer_run_queues+0x106 is __hrtimer_run_queues+262, which is
at the 6th byte of the above CS CALL instruction. Since the CS CALL
instruction occupies 6 bytes, the exception occurred in the middle of that
call instruction.

The root cause is that when using eBPF tools to probe in the middle of a
function, a kprobe with INT3 is used as the underlying implementation.

During single-step emulation of the original CALL instruction,
int3_emulate_call() assumes that the probed CALL instruction is 5 bytes
long. However, the actual CS-prefixed CALL instruction occupies 6 bytes,
so it constructs an incorrect exception return address. When the CPU
returns from the kprobe handler, the next instruction to be executed is at
the address of the last byte of that CS CALL instruction. Coincidentally,
starting from that address, the CPU fetches and decodes a completely
different instruction, which ultimately triggers a kernel crash.

Fix the issue by using the actual instruction length obtained from
the instruction decoder when constructing the exception return
address, rather than relying on the hardcoded CALL_INSN_SIZE macro.

[ mingo: Refined the changelog ]

Fixes: 6256e668b7af ("x86/kprobes: Use int3 instead of debug trap for single-step")
Suggested-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Jinke Han <jinkehan@didiglobal.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Acked-by: Yafang Shao <laoar.shao@gmail.com>
Acked-by: Borislav Petkov <bp@alien8.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://patch.msgid.link/20260908073742.GA10517@didi-ThinkCentre-M920t-N000

1 files changed, 815 insertions, 0 deletions

diff --git a/rust/Makefile b/rust/Makefile
new file mode 100644
index 000000000..da1a7409d
--- /dev/null
+++ b/rust/Makefile
@@ -0,0 +1,815 @@
+# SPDX-License-Identifier: GPL-2.0
+
+# Where to place rustdoc generated documentation
+rustdoc_output := $(objtree)/Documentation/output/rust/rustdoc
+
+# Clean generated host directory
+clean-files := host/
+
+obj-$(CONFIG_RUST) += core.o compiler_builtins.o ffi.o
+always-$(CONFIG_RUST) += exports_core_generated.h
+
+obj-$(CONFIG_RUST) += zerocopy.o
+
+ifdef CONFIG_RUST_INLINE_HELPERS
+always-$(CONFIG_RUST) += helpers/helpers.bc helpers/helpers_module.bc
+else
+obj-$(CONFIG_RUST) += helpers/helpers.o
+always-$(CONFIG_RUST) += exports_helpers_generated.h
+endif
+# Missing prototypes are expected in the helpers since these are exported
+# for Rust only, thus there is no header nor prototypes.
+CFLAGS_REMOVE_helpers/helpers.o = -Wmissing-prototypes -Wmissing-declarations
+
+always-$(CONFIG_RUST) += bindings/bindings_generated.rs bindings/bindings_helpers_generated.rs
+obj-$(CONFIG_RUST) += bindings.o pin_init.o kernel.o
+always-$(CONFIG_RUST) += exports_bindings_generated.h exports_kernel_generated.h
+
+always-$(CONFIG_RUST) += uapi/uapi_generated.rs
+obj-$(CONFIG_RUST) += uapi.o
+
+ifdef CONFIG_RUST_BUILD_ASSERT_ALLOW
+obj-$(CONFIG_RUST) += build_error.o
+else
+always-$(CONFIG_RUST) += build_error.o
+endif
+
+obj-$(CONFIG_RUST) += exports.o
+
+always-$(CONFIG_RUST) += host/libproc_macro2.rlib host/libquote.rlib host/libsyn.rlib
+
+always-$(CONFIG_RUST_KERNEL_DOCTESTS) += doctests_kernel_generated.rs
+always-$(CONFIG_RUST_KERNEL_DOCTESTS) += doctests_kernel_generated_kunit.c
+
+obj-$(CONFIG_RUST_KERNEL_DOCTESTS) += doctests_kernel_generated.o
+obj-$(CONFIG_RUST_KERNEL_DOCTESTS) += doctests_kernel_generated_kunit.o
+
+always-$(subst y,$(CONFIG_RUST),$(CONFIG_JUMP_LABEL)) += kernel/generated_arch_static_branch_asm.rs
+ifndef CONFIG_UML
+always-$(subst y,$(CONFIG_RUST),$(CONFIG_BUG)) += kernel/generated_arch_warn_asm.rs kernel/generated_arch_reachable_asm.rs
+endif
+
+# Avoids running `$(RUSTC)` when it may not be available.
+ifdef CONFIG_RUST
+
+procmacro-name = $(shell MAKEFLAGS= $(RUSTC) --print file-names --crate-name $(1) --crate-type proc-macro - </dev/null)
+procmacro-extension := $(patsubst libname.%,%,$(call procmacro-name,name))
+
+libzerocopy_derive_name := $(call procmacro-name,zerocopy_derive)
+libmacros_name := $(call procmacro-name,macros)
+libpin_init_internal_name := $(call procmacro-name,pin_init_internal)
+
+always-$(CONFIG_RUST) += $(libzerocopy_derive_name) $(libmacros_name) $(libpin_init_internal_name)
+
+# `$(rust_flags)` is passed in case the user added `--sysroot`.
+rustc_sysroot := $(shell MAKEFLAGS= $(RUSTC) $(rust_flags) --print sysroot)
+rustc_host_target := $(shell $(RUSTC) --version --verbose | grep -F 'host: ' | cut -d' ' -f2)
+RUST_LIB_SRC ?= $(rustc_sysroot)/lib/rustlib/src/rust/library
+
+ifneq ($(quiet),)
+rust_test_quiet=-q
+rustdoc_test_quiet=--test-args -q
+rustdoc_test_kernel_quiet=>/dev/null
+endif
+
+cfgs-to-flags = $(patsubst %,--cfg='%',$1)
+
+core-cfgs := \
+    no_fp_fmt_parse
+
+core-edition := $(if $(call rustc-min-version,108700),2024,2021)
+
+core-skip_flags := \
+    --edition=2021 \
+    -Wunreachable_pub
+
+core-flags := \
+    --edition=$(core-edition) \
+    $(call cfgs-to-flags,$(core-cfgs))
+
+zerocopy-cfgs := \
+    no_fp_fmt_parse
+
+zerocopy-flags := \
+    --cap-lints=allow \
+    $(call cfgs-to-flags,$(zerocopy-cfgs))
+
+zerocopy-envs := \
+    CARGO_PKG_VERSION=0.8.54
+
+proc_macro2-cfgs := \
+    feature="proc-macro" \
+    wrap_proc_macro \
+    $(if $(call rustc-min-version,108800),proc_macro_span_file proc_macro_span_location)
+
+proc_macro2-flags := \
+    --cap-lints=allow \
+    $(call cfgs-to-flags,$(proc_macro2-cfgs))
+
+quote-cfgs := \
+    feature="proc-macro"
+
+quote-skip_flags := \
+    --edition=2021
+
+quote-flags := \
+    --edition=2018 \
+    --cap-lints=allow \
+    --extern proc_macro2 \
+    $(call cfgs-to-flags,$(quote-cfgs))
+
+# `extra-traits`, `fold` and `visit` may be enabled if needed.
+syn-cfgs := \
+    feature="clone-impls" \
+    feature="derive" \
+    feature="full" \
+    feature="parsing" \
+    feature="printing" \
+    feature="proc-macro" \
+    feature="visit" \
+    feature="visit-mut"
+
+syn-flags := \
+    --cap-lints=allow \
+    --extern proc_macro2 \
+    --extern quote \
+    $(call cfgs-to-flags,$(syn-cfgs))
+
+zerocopy_derive-cfgs := \
+    zerocopy_unstable_linux
+
+zerocopy_derive-flags := \
+    --cap-lints=allow \
+    --extern proc_macro2 \
+    --extern quote \
+    --extern syn \
+    $(call cfgs-to-flags,$(zerocopy_derive-cfgs))
+
+pin_init_internal-cfgs := \
+    kernel USE_RUSTC_FEATURES
+
+pin_init_internal-flags := \
+    --extern proc_macro2 \
+    --extern quote \
+    --extern syn \
+    $(call cfgs-to-flags,$(pin_init_internal-cfgs))
+
+pin_init-cfgs := \
+    kernel USE_RUSTC_FEATURES
+
+pin_init-flags := \
+    --extern pin_init_internal \
+    --extern macros \
+    $(call cfgs-to-flags,$(pin_init-cfgs))
+
+# `rustdoc` did not save the target modifiers, thus workaround for
+# the time being (https://github.com/rust-lang/rust/issues/144521).
+rustdoc_modifiers_workaround := $(if $(call rustc-min-version,108800),-Cunsafe-allow-abi-mismatch=fixed-x18)
+
+# Similarly, for doctests (https://github.com/rust-lang/rust/issues/146465).
+doctests_modifiers_workaround := $(rustdoc_modifiers_workaround)$(if $(call rustc-min-version,109100),$(comma)sanitizer)
+
+quiet_cmd_rustdoc = RUSTDOC $(if $(rustdoc_host),H, ) $<
+      cmd_rustdoc = \
+	$(rustc_target_envs) \
+	OBJTREE=$(abspath $(objtree)) \
+	$(RUSTDOC) $(filter-out $(skip_flags) --remap-path-scope=%,$(if $(rustdoc_host),$(rust_common_flags),$(rust_flags))) \
+		$(rustc_target_flags) -L$(objtree)/$(obj)$(if $(rustdoc_host),/host) \
+		-Zunstable-options --generate-link-to-definition \
+		--output $(rustdoc_output) \
+		--crate-name $(subst rustdoc-,,$@) \
+		$(rustdoc_modifiers_workaround) \
+		$(if $(rustdoc_host),,--sysroot=/dev/null) \
+		@$(objtree)/include/generated/rustc_cfg $<
+
+# The `html_logo_url` and `html_favicon_url` forms of the `doc` attribute
+# can be used to specify a custom logo. However:
+#   - The given value is used as-is, thus it cannot be relative or a local file
+#     (unlike the non-custom case) since the generated docs have subfolders.
+#   - It requires adding it to every crate.
+#   - It requires changing `core` which comes from the sysroot.
+#
+# Using `-Zcrate-attr` would solve the last two points, but not the first.
+# The https://github.com/rust-lang/rfcs/pull/3226 RFC suggests two new
+# command-like flags to solve the issue. Meanwhile, we use the non-custom case
+# and then retouch the generated files.
+rustdoc: rustdoc-core rustdoc-macros rustdoc-compiler_builtins \
+    rustdoc-kernel rustdoc-pin_init rustdoc-zerocopy rustdoc-zerocopy_derive
+	$(Q)grep -Ehro '<a href="srctree/([^"]+)"' $(rustdoc_output) | \
+		cut -d'"' -f2 | cut -d/ -f2- | while read f; do \
+			if [ ! -e "$(srctree)/$$f" ]; then \
+				echo "warning: srctree/ link to $$f does not exist"; \
+			fi \
+		done
+	$(Q)cp $(srctree)/Documentation/images/logo.svg $(rustdoc_output)/static.files/
+	$(Q)cp $(srctree)/Documentation/images/COPYING-logo $(rustdoc_output)/static.files/
+	$(Q)find $(rustdoc_output) -name '*.html' -type f -print0 | xargs -0 sed -Ei \
+		-e 's:rust-logo-[0-9a-f]+\.svg:logo.svg:g' \
+		-e 's:favicon-[0-9a-f]+\.svg:logo.svg:g' \
+		-e 's:<link rel="alternate icon" type="image/png" href="[/.]+/static\.files/favicon-(16x16|32x32)-[0-9a-f]+\.png">::g' \
+		-e 's:<a href="srctree/([^"]+)">:<a href="$(realpath $(srctree))/\1">:g'
+	$(Q)for f in $(rustdoc_output)/static.files/rustdoc-*.css; do \
+		echo ".logo-container > img { object-fit: contain; }" >> $$f; done
+
+rustdoc-proc_macro2: private rustdoc_host = yes
+rustdoc-proc_macro2: private rustc_target_flags = $(proc_macro2-flags)
+rustdoc-proc_macro2: $(src)/proc-macro2/lib.rs rustdoc-clean FORCE
+	+$(call if_changed,rustdoc)
+
+rustdoc-quote: private rustdoc_host = yes
+rustdoc-quote: private rustc_target_flags = $(quote-flags)
+rustdoc-quote: private skip_flags = $(quote-skip_flags)
+rustdoc-quote: $(src)/quote/lib.rs rustdoc-clean rustdoc-proc_macro2 FORCE
+	+$(call if_changed,rustdoc)
+
+rustdoc-syn: private rustdoc_host = yes
+rustdoc-syn: private rustc_target_flags = $(syn-flags)
+rustdoc-syn: $(src)/syn/lib.rs rustdoc-clean rustdoc-quote FORCE
+	+$(call if_changed,rustdoc)
+
+rustdoc-zerocopy_derive: private rustdoc_host = yes
+rustdoc-zerocopy_derive: private rustc_target_flags = $(zerocopy_derive-flags) \
+    --extern proc_macro --crate-type proc-macro
+rustdoc-zerocopy_derive: $(src)/zerocopy-derive/lib.rs rustdoc-clean rustdoc-syn FORCE
+	+$(call if_changed,rustdoc)
+
+rustdoc-macros: private rustdoc_host = yes
+rustdoc-macros: private rustc_target_flags = --crate-type proc-macro \
+    --extern proc_macro --extern proc_macro2 --extern quote --extern syn
+rustdoc-macros: $(src)/macros/lib.rs rustdoc-clean rustdoc-proc_macro2 \
+    rustdoc-quote rustdoc-syn FORCE
+	+$(call if_changed,rustdoc)
+
+rustdoc-core: private skip_flags = $(core-skip_flags)
+rustdoc-core: private rustc_target_flags = $(core-flags)
+rustdoc-core: $(RUST_LIB_SRC)/core/src/lib.rs rustdoc-clean FORCE
+	+$(call if_changed,rustdoc)
+
+# Even if `rustdoc` targets are not kernel objects, they should still be
+# treated as such so that we pass the same flags. Otherwise, for instance,
+# `rustdoc` will complain about missing sanitizer flags causing an ABI mismatch.
+rustdoc-compiler_builtins: private is-kernel-object := y
+rustdoc-compiler_builtins: $(src)/compiler_builtins.rs rustdoc-core FORCE
+	+$(call if_changed,rustdoc)
+
+rustdoc-zerocopy: private rustc_target_envs := $(zerocopy-envs)
+rustdoc-zerocopy: private is-kernel-object := y
+rustdoc-zerocopy: private rustc_target_flags = $(zerocopy-flags) \
+    --extend-css $(src)/zerocopy/rustdoc/style.css
+rustdoc-zerocopy: $(src)/zerocopy/src/lib.rs rustdoc-clean rustdoc-core FORCE
+	+$(call if_changed,rustdoc)
+
+rustdoc-ffi: private is-kernel-object := y
+rustdoc-ffi: $(src)/ffi.rs rustdoc-core FORCE
+	+$(call if_changed,rustdoc)
+
+rustdoc-pin_init_internal: private rustdoc_host = yes
+rustdoc-pin_init_internal: private rustc_target_flags = $(pin_init_internal-flags) \
+    --extern proc_macro --crate-type proc-macro
+rustdoc-pin_init_internal: $(src)/pin-init/internal/src/lib.rs \
+    rustdoc-clean rustdoc-proc_macro2 rustdoc-quote rustdoc-syn FORCE
+	+$(call if_changed,rustdoc)
+
+rustdoc-pin_init: private rustdoc_host = yes
+rustdoc-pin_init: private rustc_target_flags = $(pin_init-flags) \
+    --extern pin_init_internal=$(objtree)/$(obj)/$(libpin_init_internal_name) \
+    --extern alloc --cfg feature=\"alloc\"
+rustdoc-pin_init: $(src)/pin-init/src/lib.rs rustdoc-pin_init_internal \
+    rustdoc-macros FORCE
+	+$(call if_changed,rustdoc)
+
+rustdoc-kernel: private is-kernel-object := y
+rustdoc-kernel: private rustc_target_flags = --extern ffi --extern pin_init \
+    --extern build_error --extern macros \
+    --extern bindings --extern uapi \
+    --extern zerocopy --extern zerocopy_derive
+rustdoc-kernel: $(src)/kernel/lib.rs rustdoc-core rustdoc-ffi rustdoc-macros \
+    rustdoc-pin_init rustdoc-compiler_builtins $(obj)/$(libmacros_name) \
+    $(obj)/bindings.o FORCE
+	+$(call if_changed,rustdoc)
+
+rustdoc-clean: FORCE
+	$(Q)rm -rf $(rustdoc_output)
+
+quiet_cmd_rustc_test_library = $(RUSTC_OR_CLIPPY_QUIET) TL $<
+      cmd_rustc_test_library = \
+	$(rustc_target_envs) \
+	OBJTREE=$(abspath $(objtree)) \
+	$(RUSTC_OR_CLIPPY) $(filter-out $(skip_flags),$(rust_common_flags) $(rustc_target_flags)) \
+		@$(objtree)/include/generated/rustc_cfg \
+		--crate-type $(if $(rustc_test_library_proc),proc-macro,rlib) \
+		--out-dir $(objtree)/$(obj)/test --cfg testlib \
+		-L$(objtree)/$(obj)/test \
+		--crate-name $(subst rusttest-,,$(subst rusttestlib-,,$@)) $<
+
+rusttestlib-zerocopy: private rustc_target_envs := $(zerocopy-envs)
+rusttestlib-zerocopy: private rustc_target_flags = $(zerocopy-flags)
+rusttestlib-zerocopy: $(src)/zerocopy/src/lib.rs FORCE
+	+$(call if_changed,rustc_test_library)
+
+rusttestlib-build_error: $(src)/build_error.rs FORCE
+	+$(call if_changed,rustc_test_library)
+
+rusttestlib-ffi: $(src)/ffi.rs FORCE
+	+$(call if_changed,rustc_test_library)
+
+rusttestlib-proc_macro2: private rustc_target_flags = $(proc_macro2-flags)
+rusttestlib-proc_macro2: $(src)/proc-macro2/lib.rs FORCE
+	+$(call if_changed,rustc_test_library)
+
+rusttestlib-quote: private skip_flags = $(quote-skip_flags)
+rusttestlib-quote: private rustc_target_flags = $(quote-flags)
+rusttestlib-quote: $(src)/quote/lib.rs rusttestlib-proc_macro2 FORCE
+	+$(call if_changed,rustc_test_library)
+
+rusttestlib-syn: private rustc_target_flags = $(syn-flags)
+rusttestlib-syn: $(src)/syn/lib.rs rusttestlib-quote FORCE
+	+$(call if_changed,rustc_test_library)
+
+rusttestlib-zerocopy_derive: private rustc_target_flags = $(zerocopy_derive-flags) \
+    --extern proc_macro
+rusttestlib-zerocopy_derive: private rustc_test_library_proc = yes
+rusttestlib-zerocopy_derive: $(src)/zerocopy-derive/lib.rs rusttestlib-syn FORCE
+	+$(call if_changed,rustc_test_library)
+
+rusttestlib-macros: private rustc_target_flags = --extern proc_macro \
+    --extern proc_macro2 --extern quote --extern syn
+rusttestlib-macros: private rustc_test_library_proc = yes
+rusttestlib-macros: $(src)/macros/lib.rs \
+    rusttestlib-proc_macro2 rusttestlib-quote rusttestlib-syn FORCE
+	+$(call if_changed,rustc_test_library)
+
+rusttestlib-pin_init_internal: private rustc_target_flags = $(pin_init_internal-flags) \
+    --extern proc_macro
+rusttestlib-pin_init_internal: private rustc_test_library_proc = yes
+rusttestlib-pin_init_internal: $(src)/pin-init/internal/src/lib.rs \
+    rusttestlib-proc_macro2 rusttestlib-quote rusttestlib-syn FORCE
+	+$(call if_changed,rustc_test_library)
+
+rusttestlib-pin_init: private rustc_target_flags = $(pin_init-flags)
+rusttestlib-pin_init: $(src)/pin-init/src/lib.rs rusttestlib-macros \
+    rusttestlib-pin_init_internal $(obj)/$(libpin_init_internal_name) FORCE
+	+$(call if_changed,rustc_test_library)
+
+rusttestlib-kernel: private rustc_target_flags = --extern ffi \
+    --extern build_error --extern macros --extern pin_init \
+    --extern bindings --extern uapi \
+    --extern zerocopy=$(objtree)/$(obj)/test/libzerocopy.rlib \
+    --extern zerocopy_derive=$(objtree)/$(obj)/test/$(libzerocopy_derive_name)
+rusttestlib-kernel: $(src)/kernel/lib.rs rusttestlib-bindings rusttestlib-uapi \
+    rusttestlib-build_error rusttestlib-pin_init $(obj)/$(libmacros_name) \
+    $(obj)/bindings.o rusttestlib-zerocopy rusttestlib-zerocopy_derive FORCE
+	+$(call if_changed,rustc_test_library)
+
+rusttestlib-bindings: private rustc_target_flags = --extern ffi --extern pin_init
+rusttestlib-bindings: $(src)/bindings/lib.rs rusttestlib-ffi rusttestlib-pin_init FORCE
+	+$(call if_changed,rustc_test_library)
+
+rusttestlib-uapi: private rustc_target_flags = --extern ffi --extern pin_init
+rusttestlib-uapi: $(src)/uapi/lib.rs rusttestlib-ffi rusttestlib-pin_init FORCE
+	+$(call if_changed,rustc_test_library)
+
+quiet_cmd_rustdoc_test = RUSTDOC T $<
+      cmd_rustdoc_test = \
+	$(rustc_target_envs) \
+	RUST_MODFILE=test.rs \
+	OBJTREE=$(abspath $(objtree)) \
+	$(RUSTDOC) --test $(rust_common_flags) \
+		-Zcrate-attr='feature(used_with_arg)' \
+		@$(objtree)/include/generated/rustc_cfg \
+		$(rustc_target_flags) $(rustdoc_test_target_flags) \
+		$(rustdoc_test_quiet) \
+		-L$(objtree)/$(obj)/test --output $(rustdoc_output) \
+		--crate-name $(subst rusttest-,,$@) $<
+
+quiet_cmd_rustdoc_test_kernel = RUSTDOC TK $<
+      cmd_rustdoc_test_kernel = \
+	rm -rf $(objtree)/$(obj)/test/doctests/kernel; \
+	mkdir -p $(objtree)/$(obj)/test/doctests/kernel; \
+	$(rustc_target_envs) \
+	OBJTREE=$(abspath $(objtree)) \
+	$(RUSTDOC) --test $(filter-out --remap-path-scope=%,$(rust_flags)) \
+		-L$(objtree)/$(obj) --extern ffi --extern pin_init \
+		--extern kernel --extern build_error --extern macros \
+		--extern bindings --extern uapi \
+		--extern zerocopy --extern zerocopy_derive \
+		--no-run --crate-name kernel -Zunstable-options \
+		--sysroot=/dev/null \
+		$(doctests_modifiers_workaround) \
+		--test-builder $(objtree)/scripts/rustdoc_test_builder \
+		$< $(rustdoc_test_kernel_quiet); \
+	$(objtree)/scripts/rustdoc_test_gen
+
+%/doctests_kernel_generated.rs %/doctests_kernel_generated_kunit.c: \
+    $(src)/kernel/lib.rs $(obj)/kernel.o \
+    $(objtree)/scripts/rustdoc_test_builder \
+    $(objtree)/scripts/rustdoc_test_gen FORCE
+	+$(call if_changed,rustdoc_test_kernel)
+
+# We cannot use `-Zpanic-abort-tests` because some tests are dynamic,
+# so for the moment we skip `-Cpanic=abort`.
+quiet_cmd_rustc_test = $(RUSTC_OR_CLIPPY_QUIET) T  $<
+      cmd_rustc_test = \
+	$(rustc_target_envs) \
+	OBJTREE=$(abspath $(objtree)) \
+	$(RUSTC_OR_CLIPPY) --test $(rust_common_flags) \
+		@$(objtree)/include/generated/rustc_cfg \
+		$(rustc_target_flags) --out-dir $(objtree)/$(obj)/test \
+		-L$(objtree)/$(obj)/test \
+		--crate-name $(subst rusttest-,,$@) $<; \
+	$(objtree)/$(obj)/test/$(subst rusttest-,,$@) $(rust_test_quiet) \
+		$(rustc_test_run_flags)
+
+rusttest: rusttest-macros
+
+rusttest-macros: private rustc_target_flags = --extern proc_macro \
+    --extern macros --extern kernel --extern pin_init \
+    --extern proc_macro2 --extern quote --extern syn
+rusttest-macros: private rustdoc_test_target_flags = --crate-type proc-macro
+rusttest-macros: $(src)/macros/lib.rs \
+    rusttestlib-macros rusttestlib-kernel rusttestlib-pin_init FORCE
+	+$(call if_changed,rustc_test)
+	+$(call if_changed,rustdoc_test)
+
+ifdef CONFIG_CC_IS_CLANG
+bindgen_c_flags = $(c_flags)
+else
+# bindgen relies on libclang to parse C. Ideally, bindgen would support a GCC
+# plugin backend and/or the Clang driver would be perfectly compatible with GCC.
+#
+# For the moment, here we are tweaking the flags on the fly. This is a hack,
+# and some kernel configurations may not work (e.g. `GCC_PLUGIN_RANDSTRUCT`
+# if we end up using one of those structs).
+bindgen_skip_c_flags := -mno-fp-ret-in-387 -mpreferred-stack-boundary=% \
+	-mskip-rax-setup -mgeneral-regs-only -msign-return-address=% \
+	-mindirect-branch=thunk-extern -mindirect-branch-register \
+	-mfunction-return=thunk-extern -mrecord-mcount -mabi=lp64 \
+	-mindirect-branch-cs-prefix -mstack-protector-guard% -mtraceback=no \
+	-mno-pointers-to-nested-functions -mno-string \
+	-mno-strict-align -mstrict-align -mdirect-extern-access \
+	-mexplicit-relocs -mno-check-zero-division \
+	-fconserve-stack -falign-jumps=% -falign-loops=% \
+	-femit-struct-debug-baseonly -fno-ipa-cp-clone -fno-ipa-sra \
+	-fno-partial-inlining -fplugin-arg-arm_ssp_per_task_plugin-% \
+	-fno-reorder-blocks -fno-allow-store-data-races -fasan-shadow-offset=% \
+	-fzero-call-used-regs=% -fno-stack-clash-protection \
+	-fno-inline-functions-called-once -fsanitize=bounds-strict \
+	-fstrict-flex-arrays=% -fmin-function-alignment=% \
+	-fzero-init-padding-bits=% -mno-fdpic \
+	-fdiagnostics-show-context -fdiagnostics-show-context=% \
+	--param=% --param asan-% -fno-isolate-erroneous-paths-dereference \
+	-ffixed-r2 -mmultiple -mno-readonly-in-sdata
+
+# Derived from `scripts/Makefile.clang`.
+BINDGEN_TARGET_x86	:= x86_64-linux-gnu
+BINDGEN_TARGET_arm64	:= aarch64-linux-gnu
+BINDGEN_TARGET_arm	:= arm-linux-gnueabi
+BINDGEN_TARGET_loongarch	:= loongarch64-linux-gnusf
+BINDGEN_TARGET_s390	:= s390x-linux-gnu
+# This is only for i386 UM builds, which need the 32-bit target not -m32
+BINDGEN_TARGET_i386	:= i386-linux-gnu
+
+ifdef CONFIG_PPC64
+BINDGEN_TARGET_powerpc	:= powerpc64le-linux-gnu
+else
+BINDGEN_TARGET_powerpc	:= powerpc-linux-gnu
+endif
+
+BINDGEN_TARGET_um	:= $(BINDGEN_TARGET_$(SUBARCH))
+BINDGEN_TARGET		:= $(BINDGEN_TARGET_$(SRCARCH))
+
+# All warnings are inhibited since GCC builds are very experimental,
+# many GCC warnings are not supported by Clang, they may only appear in
+# some configurations, with new GCC versions, etc.
+bindgen_extra_c_flags = -w --target=$(BINDGEN_TARGET)
+
+# Auto variable zero-initialization requires an additional special option with
+# clang that is going to be removed sometime in the future (likely in
+# clang-18), so make sure to pass this option only if clang supports it
+# (libclang major version < 16).
+#
+# https://github.com/llvm/llvm-project/issues/44842
+# https://github.com/llvm/llvm-project/blob/llvmorg-16.0.0-rc2/clang/docs/ReleaseNotes.rst#deprecated-compiler-flags
+ifdef CONFIG_INIT_STACK_ALL_ZERO
+libclang_maj_ver=$(shell $(BINDGEN) $(srctree)/scripts/rust_is_available_bindgen_libclang.h 2>&1 | sed -ne 's/.*clang version \([0-9]*\).*/\1/p')
+ifeq ($(shell expr $(libclang_maj_ver) \< 16), 1)
+bindgen_extra_c_flags += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang
+endif
+endif
+
+bindgen_c_flags = $(filter-out $(bindgen_skip_c_flags), $(c_flags)) \
+	$(bindgen_extra_c_flags)
+endif
+
+ifdef CONFIG_LTO
+bindgen_c_flags_lto = $(filter-out $(CC_FLAGS_LTO), $(bindgen_c_flags))
+else
+bindgen_c_flags_lto = $(bindgen_c_flags)
+endif
+
+# `-fno-builtin` is passed to avoid `bindgen` from using `clang` builtin
+# prototypes for functions like `memcpy` -- if this flag is not passed,
+# `bindgen`-generated prototypes use `c_ulong` or `c_uint` depending on
+# architecture instead of generating `usize`.
+bindgen_c_flags_final = $(bindgen_c_flags_lto) -fno-builtin -D__BINDGEN__
+
+# `--rust-target` points to our minimum supported Rust version.
+quiet_cmd_bindgen = BINDGEN $@
+      cmd_bindgen = \
+	$(BINDGEN) $< $(bindgen_target_flags) --rust-target 1.85 \
+		--use-core --with-derive-default --ctypes-prefix ffi --no-layout-tests \
+		--no-debug '.*' --enable-function-attribute-detection \
+		-o $@ -- $(bindgen_c_flags_final) -DMODULE \
+		$(bindgen_target_cflags) $(bindgen_target_extra)
+
+$(obj)/bindings/bindings_generated.rs: private bindgen_target_flags = \
+    $(shell grep -Ev '^#|^$$' $(src)/bindgen_parameters)
+$(obj)/bindings/bindings_generated.rs: private bindgen_target_extra = ; \
+    sed -Ei 's/pub const RUST_CONST_HELPER_([a-zA-Z0-9_]*)/pub const \1/g' $@
+$(obj)/bindings/bindings_generated.rs: $(src)/bindings/bindings_helper.h \
+    $(src)/bindgen_parameters FORCE
+	$(call if_changed_dep,bindgen)
+
+$(obj)/uapi/uapi_generated.rs: private bindgen_target_flags = \
+    $(shell grep -Ev '^#|^$$' $(src)/bindgen_parameters)
+$(obj)/uapi/uapi_generated.rs: $(src)/uapi/uapi_helper.h \
+    $(src)/bindgen_parameters FORCE
+	$(call if_changed_dep,bindgen)
+
+# See `CFLAGS_REMOVE_helpers.o` above. In addition, Clang on C does not warn
+# with `-Wmissing-declarations` (unlike GCC), so it is not strictly needed here
+# given it is `libclang`; but for consistency, future Clang changes and/or
+# a potential future GCC backend for `bindgen`, we disable it too.
+$(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_flags = \
+    --blocklist-type '.*' --allowlist-var '' \
+    --allowlist-function 'rust_helper_.*'
+$(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_cflags = \
+    -I$(objtree)/$(obj) -Wno-missing-prototypes -Wno-missing-declarations
+$(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_extra = ; \
+    sed -Ei 's/pub fn rust_helper_([a-zA-Z0-9_]*)/#[link_name="rust_helper_\1"]\n    pub fn \1/g' $@
+$(obj)/bindings/bindings_helpers_generated.rs: $(src)/helpers/helpers.c FORCE
+	$(call if_changed_dep,bindgen)
+
+quiet_cmd_rust_helper = HELPER  $@
+      cmd_rust_helper = \
+	$(CC) $(filter-out $(CFLAGS_REMOVE_helpers/helpers.o), $(c_flags)) \
+		-c -g0 $< -emit-llvm -o $@
+
+$(obj)/helpers/helpers.bc: private part-of-builtin := y
+$(obj)/helpers/helpers_module.bc: private part-of-module := y
+$(obj)/helpers/helpers.bc $(obj)/helpers/helpers_module.bc: $(src)/helpers/helpers.c FORCE
+	+$(call if_changed_dep,rust_helper)
+
+rust_exports = $(NM) -p --defined-only $(1) | awk '$$2~/(T|R|D|B)/ && $$3!~/__(pfx|cfi|odr_asan)/ { printf $(2),$$3 }'
+
+quiet_cmd_exports = EXPORTS $@
+      cmd_exports = \
+	$(call rust_exports,$<,"EXPORT_SYMBOL_RUST_GPL(%s);\n") > $@
+
+$(obj)/exports_core_generated.h: $(obj)/core.o FORCE
+	$(call if_changed,exports)
+
+# Even though Rust kernel modules should never use the bindings directly,
+# symbols from the `bindings` crate and the C helpers need to be exported
+# because Rust generics and inlined functions may not get their code generated
+# in the crate where they are defined. Other helpers, called from non-inline
+# functions, may not be exported, in principle. However, in general, the Rust
+# compiler does not guarantee codegen will be performed for a non-inline
+# function either. Therefore, we export all symbols from helpers and bindings.
+# In the future, this may be revisited to reduce the number of exports after
+# the compiler is informed about the places codegen is required.
+$(obj)/exports_helpers_generated.h: $(obj)/helpers/helpers.o FORCE
+	$(call if_changed,exports)
+
+$(obj)/exports_bindings_generated.h: $(obj)/bindings.o FORCE
+	$(call if_changed,exports)
+
+$(obj)/exports_kernel_generated.h: $(obj)/kernel.o FORCE
+	$(call if_changed,exports)
+
+quiet_cmd_rustc_procmacrolibrary = $(if $(skip_clippy),RUSTC,$(RUSTC_OR_CLIPPY_QUIET)) PL $@
+      cmd_rustc_procmacrolibrary = \
+	$(rustc_target_envs) \
+	$(if $(skip_clippy),$(RUSTC),$(RUSTC_OR_CLIPPY)) \
+		$(filter-out $(skip_flags),$(rust_common_flags) $(rustc_target_flags)) \
+		--emit=dep-info=$(depfile) --emit=link=$@ --crate-type rlib -O \
+		--out-dir $(objtree)/$(obj)/host -L$(objtree)/$(obj)/host \
+		--crate-name $(patsubst lib%.rlib,%,$(notdir $@)) $<
+
+$(obj)/host/libproc_macro2.rlib: private skip_clippy = 1
+$(obj)/host/libproc_macro2.rlib: private rustc_target_flags = $(proc_macro2-flags)
+$(obj)/host/libproc_macro2.rlib: $(src)/proc-macro2/lib.rs FORCE
+	+$(call if_changed_dep,rustc_procmacrolibrary)
+
+$(obj)/host/libquote.rlib: private skip_clippy = 1
+$(obj)/host/libquote.rlib: private skip_flags = $(quote-skip_flags)
+$(obj)/host/libquote.rlib: private rustc_target_flags = $(quote-flags)
+$(obj)/host/libquote.rlib: $(src)/quote/lib.rs $(obj)/host/libproc_macro2.rlib FORCE
+	+$(call if_changed_dep,rustc_procmacrolibrary)
+
+$(obj)/host/libsyn.rlib: private skip_clippy = 1
+$(obj)/host/libsyn.rlib: private rustc_target_flags = $(syn-flags)
+$(obj)/host/libsyn.rlib: $(src)/syn/lib.rs $(obj)/host/libquote.rlib FORCE
+	+$(call if_changed_dep,rustc_procmacrolibrary)
+
+quiet_cmd_rustc_procmacro = $(if $(skip_clippy),RUSTC,$(RUSTC_OR_CLIPPY_QUIET)) P $@
+      cmd_rustc_procmacro = \
+	$(rustc_target_envs) \
+	$(if $(skip_clippy),$(RUSTC),$(RUSTC_OR_CLIPPY)) $(rust_common_flags) $(rustc_target_flags) \
+		-Clinker-flavor=gcc -Clinker=$(HOSTCC) \
+		-Clink-args='$(call escsq,$(KBUILD_PROCMACROLDFLAGS))' \
+		--emit=dep-info=$(depfile) --emit=link=$@ --extern proc_macro \
+		--crate-type proc-macro -L$(objtree)/$(obj)/host \
+		--crate-name $(patsubst lib%.$(procmacro-extension),%,$(notdir $@)) \
+		@$(objtree)/include/generated/rustc_cfg $<
+
+# Procedural macros can only be used with the `rustc` that compiled it.
+$(obj)/$(libzerocopy_derive_name): private skip_clippy = 1
+$(obj)/$(libzerocopy_derive_name): private rustc_target_flags = $(zerocopy_derive-flags)
+$(obj)/$(libzerocopy_derive_name): $(src)/zerocopy-derive/lib.rs $(obj)/host/libproc_macro2.rlib \
+    $(obj)/host/libquote.rlib $(obj)/host/libsyn.rlib FORCE
+	+$(call if_changed_dep,rustc_procmacro)
+
+$(obj)/$(libmacros_name): private rustc_target_flags = \
+    --extern proc_macro2 --extern quote --extern syn
+$(obj)/$(libmacros_name): $(src)/macros/lib.rs $(obj)/host/libproc_macro2.rlib \
+    $(obj)/host/libquote.rlib $(obj)/host/libsyn.rlib FORCE
+	+$(call if_changed_dep,rustc_procmacro)
+
+$(obj)/$(libpin_init_internal_name): private rustc_target_flags = $(pin_init_internal-flags)
+$(obj)/$(libpin_init_internal_name): $(src)/pin-init/internal/src/lib.rs \
+    $(obj)/host/libproc_macro2.rlib $(obj)/host/libquote.rlib $(obj)/host/libsyn.rlib FORCE
+	+$(call if_changed_dep,rustc_procmacro)
+
+# `rustc` requires `-Zunstable-options` to use custom target specifications
+# since Rust 1.95.0 (https://github.com/rust-lang/rust/pull/151534).
+quiet_cmd_rustc_library = $(if $(skip_clippy),RUSTC,$(RUSTC_OR_CLIPPY_QUIET)) L $@
+      cmd_rustc_library = \
+	$(rustc_target_envs) \
+	OBJTREE=$(abspath $(objtree)) \
+	$(if $(skip_clippy),$(RUSTC),$(RUSTC_OR_CLIPPY)) \
+		$(filter-out $(skip_flags),$(rust_flags)) $(rustc_target_flags) \
+		--emit=dep-info=$(depfile) --emit=$(if $(link_helper),llvm-bc=$(patsubst %.o,%.bc,$@),obj=$@) \
+		--emit=metadata=$(dir $@)$(patsubst %.o,lib%.rmeta,$(notdir $@)) \
+		--crate-type rlib -L$(objtree)/$(obj) \
+		--crate-name $(patsubst %.o,%,$(notdir $@)) $< \
+		--sysroot=/dev/null \
+		-Zunstable-options \
+	$(if $(link_helper),;$(LLVM_LINK) --internalize --suppress-warnings $(patsubst %.o,%.bc,$@) \
+		$(obj)/helpers/helpers$(if $(part-of-module),_module).bc -o $(patsubst %.o,%.m.bc,$@); \
+		$(CC) $(CLANG_FLAGS) $(filter-out $(CC_FLAGS_LTO),$(KBUILD_CFLAGS)) \
+		$(CC_FLAGS_RUST_INLINE_HELPERS) -Wno-override-module -c $(patsubst %.o,%.m.bc,$@) -o $@ \
+		$(cmd_ld_single)) \
+	$(if $(rustc_objcopy),;$(OBJCOPY) $(rustc_objcopy) $@) \
+	$(cmd_objtool)
+
+rust-analyzer:
+	$(Q)MAKEFLAGS= $(srctree)/scripts/generate_rust_analyzer.py \
+		--cfgs='core=$(core-cfgs)' $(core-edition) \
+		--cfgs='zerocopy=$(zerocopy-cfgs)' \
+		--cfgs='proc_macro2=$(proc_macro2-cfgs)' \
+		--cfgs='quote=$(quote-cfgs)' \
+		--cfgs='syn=$(syn-cfgs)' \
+		--cfgs='zerocopy_derive=$(zerocopy_derive-cfgs)' \
+		--cfgs='pin_init_internal=$(pin_init_internal-cfgs)' \
+		--cfgs='pin_init=$(pin_init-cfgs)' \
+		--envs='zerocopy=$(zerocopy-envs)' \
+		$(realpath $(srctree)) $(realpath $(objtree)) \
+		$(rustc_sysroot) $(RUST_LIB_SRC) $(if $(KBUILD_EXTMOD),$(srcroot)) \
+		> rust-project.json
+
+redirect-intrinsics = \
+	__addsf3 __eqsf2 __extendsfdf2 __gesf2 __lesf2 __ltsf2 __mulsf3 __nesf2 __truncdfsf2 __unordsf2 \
+	__adddf3 __eqdf2 __ledf2 __ltdf2 __muldf3 __unorddf2 \
+	__muloti4 __multi3 \
+	__udivmodti4 __udivti3 __umodti3
+
+ifdef CONFIG_ARM
+	# Add eabi initrinsics for ARM 32-bit
+	redirect-intrinsics += \
+		__aeabi_fadd __aeabi_fmul __aeabi_fcmpeq __aeabi_fcmple __aeabi_fcmplt __aeabi_fcmpun \
+		__aeabi_dadd __aeabi_dmul __aeabi_dcmple __aeabi_dcmplt __aeabi_dcmpun \
+		__aeabi_uldivmod
+endif
+ifneq ($(or $(CONFIG_ARM64),$(and $(CONFIG_RISCV),$(CONFIG_64BIT))),)
+	# These intrinsics are defined for ARM64 and RISCV64
+	redirect-intrinsics += \
+		__ashrti3 \
+		__ashlti3 __lshrti3
+endif
+ifdef CONFIG_PPC32
+	redirect-intrinsics += \
+		__udivdi3 __umoddi3
+endif
+
+ifdef CONFIG_MODVERSIONS
+cmd_gendwarfksyms = $(if $(skip_gendwarfksyms),, \
+	$(call rust_exports,$@,"%s\n") | \
+	scripts/gendwarfksyms/gendwarfksyms \
+		$(if $(KBUILD_GENDWARFKSYMS_STABLE), --stable) \
+		$(if $(KBUILD_SYMTYPES), --symtypes $(@:.o=.symtypes),) \
+		$@ >> $(dot-target).cmd)
+endif
+
+define rule_rustc_library
+	$(call cmd_and_fixdep,rustc_library)
+	$(call cmd,gen_objtooldep)
+	$(call cmd,gendwarfksyms)
+endef
+
+define rule_rust_cc_library
+	$(call if_changed_rule,cc_o_c)
+	$(call cmd,force_checksrc)
+	$(call cmd,gendwarfksyms)
+endef
+
+# helpers.o uses the same export mechanism as Rust libraries, so ensure symbol
+# versions are calculated for the helpers too.
+$(obj)/helpers/helpers.o: $(src)/helpers/helpers.c $(recordmcount_source) FORCE
+	+$(call if_changed_rule,rust_cc_library)
+
+# Disable symbol versioning for exports.o to avoid conflicts with the actual
+# symbol versions generated from Rust objects.
+$(obj)/exports.o: private skip_gendwarfksyms = 1
+
+$(obj)/core.o: private skip_clippy = 1
+$(obj)/core.o: private skip_flags = $(core-skip_flags)
+$(obj)/core.o: private rustc_objcopy = $(foreach sym,$(redirect-intrinsics),--redefine-sym $(sym)=__rust$(sym))
+$(obj)/core.o: private rustc_target_flags = $(core-flags)
+$(obj)/core.o: $(RUST_LIB_SRC)/core/src/lib.rs \
+    $(wildcard $(objtree)/include/config/RUSTC_VERSION_TEXT) FORCE
+	+$(call if_changed_rule,rustc_library)
+ifneq ($(or $(CONFIG_X86_64),$(CONFIG_X86_32)),)
+$(obj)/core.o: scripts/target.json
+endif
+KCOV_INSTRUMENT_core.o := n
+
+$(obj)/compiler_builtins.o: private skip_gendwarfksyms = 1
+$(obj)/compiler_builtins.o: private rustc_objcopy = -w -W '__*'
+$(obj)/compiler_builtins.o: $(src)/compiler_builtins.rs $(obj)/core.o FORCE
+	+$(call if_changed_rule,rustc_library)
+
+$(obj)/zerocopy.o: private skip_clippy = 1
+$(obj)/zerocopy.o: private skip_gendwarfksyms = 1
+$(obj)/zerocopy.o: private rustc_target_envs := $(zerocopy-envs)
+$(obj)/zerocopy.o: private rustc_target_flags = $(zerocopy-flags)
+$(obj)/zerocopy.o: $(src)/zerocopy/src/lib.rs $(obj)/compiler_builtins.o FORCE
+	+$(call if_changed_rule,rustc_library)
+
+$(obj)/pin_init.o: private skip_gendwarfksyms = 1
+$(obj)/pin_init.o: private rustc_target_flags = $(pin_init-flags)
+$(obj)/pin_init.o: $(src)/pin-init/src/lib.rs $(obj)/compiler_builtins.o \
+    $(obj)/$(libpin_init_internal_name) $(obj)/$(libmacros_name) FORCE
+	+$(call if_changed_rule,rustc_library)
+
+# Even if normally `build_error` is not a kernel object, it should still be
+# treated as such so that we pass the same flags. Otherwise, for instance,
+# `rustc` will complain about missing sanitizer flags causing an ABI mismatch.
+$(obj)/build_error.o: private is-kernel-object := y
+$(obj)/build_error.o: private skip_gendwarfksyms = 1
+$(obj)/build_error.o: $(src)/build_error.rs $(obj)/compiler_builtins.o FORCE
+	+$(call if_changed_rule,rustc_library)
+
+$(obj)/ffi.o: private skip_gendwarfksyms = 1
+$(obj)/ffi.o: $(src)/ffi.rs $(obj)/compiler_builtins.o FORCE
+	+$(call if_changed_rule,rustc_library)
+
+$(obj)/bindings.o: private rustc_target_flags = --extern ffi --extern pin_init
+$(obj)/bindings.o: $(src)/bindings/lib.rs \
+    $(obj)/ffi.o \
+    $(obj)/pin_init.o \
+    $(obj)/bindings/bindings_generated.rs \
+    $(obj)/bindings/bindings_helpers_generated.rs FORCE
+	+$(call if_changed_rule,rustc_library)
+
+$(obj)/uapi.o: private rustc_target_flags = --extern ffi --extern pin_init
+$(obj)/uapi.o: private skip_gendwarfksyms = 1
+$(obj)/uapi.o: $(src)/uapi/lib.rs \
+    $(obj)/ffi.o \
+    $(obj)/pin_init.o \
+    $(obj)/uapi/uapi_generated.rs FORCE
+	+$(call if_changed_rule,rustc_library)
+
+$(obj)/kernel.o: private rustc_target_flags = --extern ffi --extern pin_init \
+    --extern build_error --extern macros --extern bindings --extern uapi \
+    --extern zerocopy --extern zerocopy_derive
+$(obj)/kernel.o: $(src)/kernel/lib.rs $(obj)/build_error.o $(obj)/pin_init.o \
+    $(obj)/$(libmacros_name) $(obj)/bindings.o $(obj)/uapi.o \
+    $(obj)/zerocopy.o $(obj)/$(libzerocopy_derive_name) FORCE
+	+$(call if_changed_rule,rustc_library)
+
+ifdef CONFIG_JUMP_LABEL
+$(obj)/kernel.o: $(obj)/kernel/generated_arch_static_branch_asm.rs
+endif
+ifndef CONFIG_UML
+ifdef CONFIG_BUG
+$(obj)/kernel.o: $(obj)/kernel/generated_arch_warn_asm.rs $(obj)/kernel/generated_arch_reachable_asm.rs
+endif
+endif
+
+ifdef CONFIG_RUST_INLINE_HELPERS
+$(obj)/kernel.o: private link_helper = 1
+$(obj)/kernel.o: $(obj)/helpers/helpers.bc
+endif
+
+endif # CONFIG_RUST