mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-29 04:09:39 +00:00
310897659c
More additions to the Rust core. Importantly, this adds the pin-init
API, which will be used by other abstractions, such as the
synchronization ones added here too:
- pin-init API: a solution for the safe pinned initialization problem.
This allows to reduce the need for 'unsafe' code in the kernel when
dealing with data structures that require a stable address. Commit
90e53c5e70 ("rust: add pin-init API core") contains a nice
introduction -- here is an example of how it looks like:
#[pin_data]
struct Example {
#[pin]
value: Mutex<u32>,
#[pin]
value_changed: CondVar,
}
impl Example {
fn new() -> impl PinInit<Self> {
pin_init!(Self {
value <- new_mutex!(0),
value_changed <- new_condvar!(),
})
}
}
// In a `Box`.
let b = Box::pin_init(Example::new())?;
// In the stack.
stack_pin_init!(let s = Example::new());
- 'sync' module: new types 'LockClassKey' ('struct lock_class_key'),
'Lock', 'Guard', 'Mutex' ('struct mutex'), 'SpinLock'
('spinlock_t'), 'LockedBy' and 'CondVar' (uses 'wait_queue_head_t'),
plus macros such as 'static_lock_class!' and 'new_spinlock!'.
In particular, 'Lock' and 'Guard' are generic implementations that
contain code that is common to all locks. Then, different backends
(the new 'Backend' trait) are implemented and used to define types
like 'Mutex':
type Mutex<T> = Lock<T, MutexBackend>;
In addition, new methods 'assume_init()', 'init_with()' and
'pin_init_with()' for 'UniqueArc<MaybeUninit<T>>' and 'downcast()'
for 'Arc<dyn Any + Send + Sync>'; as well as 'Debug' and 'Display'
implementations for 'Arc' and 'UniqueArc'. Reduced stack usage of
'UniqueArc::try_new_uninit()', too.
- 'types' module: new trait 'AlwaysRefCounted' and new type 'ARef'
(an owned reference to an always-reference-counted object, meant to
be used in wrappers for C types that have their own ref counting
functions).
Moreover, new associated functions 'raw_get()' and 'ffi_init()'
for 'Opaque'.
- New 'task' module with a new type 'Task' ('struct task_struct'), and
a new macro 'current!' to safely get a reference to the current one.
- New 'ioctl' module with new '_IOC*' const functions (equivalent to
the C macros).
- New 'uapi' crate, intended to be accessible by drivers directly.
- 'macros' crate: new 'quote!' macro (similar to the one provided in
userspace by the 'quote' crate); and the 'module!' macro now allows
specifying multiple module aliases.
- 'error' module: new associated functions for the 'Error' type,
such as 'from_errno()' and new functions such as 'to_result()'.
- 'alloc' crate: more fallible 'Vec' methods: 'try_resize` and
'try_extend_from_slice' and the infrastructure (imported from
the Rust standard library) they need.
-----BEGIN PGP SIGNATURE-----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=1I2N
-----END PGP SIGNATURE-----
Merge tag 'rust-6.4' of https://github.com/Rust-for-Linux/linux
Pull rust updates from Miguel Ojeda
"More additions to the Rust core. Importantly, this adds the pin-init
API, which will be used by other abstractions, such as the
synchronization ones added here too:
- pin-init API: a solution for the safe pinned initialization
problem.
This allows to reduce the need for 'unsafe' code in the kernel when
dealing with data structures that require a stable address. Commit
90e53c5e70 ("rust: add pin-init API core") contains a nice
introduction -- here is an example of how it looks like:
#[pin_data]
struct Example {
#[pin]
value: Mutex<u32>,
#[pin]
value_changed: CondVar,
}
impl Example {
fn new() -> impl PinInit<Self> {
pin_init!(Self {
value <- new_mutex!(0),
value_changed <- new_condvar!(),
})
}
}
// In a `Box`.
let b = Box::pin_init(Example::new())?;
// In the stack.
stack_pin_init!(let s = Example::new());
- 'sync' module:
New types 'LockClassKey' ('struct lock_class_key'), 'Lock',
'Guard', 'Mutex' ('struct mutex'), 'SpinLock' ('spinlock_t'),
'LockedBy' and 'CondVar' (uses 'wait_queue_head_t'), plus macros
such as 'static_lock_class!' and 'new_spinlock!'.
In particular, 'Lock' and 'Guard' are generic implementations that
contain code that is common to all locks. Then, different backends
(the new 'Backend' trait) are implemented and used to define types
like 'Mutex':
type Mutex<T> = Lock<T, MutexBackend>;
In addition, new methods 'assume_init()', 'init_with()' and
'pin_init_with()' for 'UniqueArc<MaybeUninit<T>>' and 'downcast()'
for 'Arc<dyn Any + Send + Sync>'; as well as 'Debug' and 'Display'
implementations for 'Arc' and 'UniqueArc'. Reduced stack usage of
'UniqueArc::try_new_uninit()', too.
- 'types' module:
New trait 'AlwaysRefCounted' and new type 'ARef' (an owned
reference to an always-reference-counted object, meant to be used
in wrappers for C types that have their own ref counting
functions).
Moreover, new associated functions 'raw_get()' and 'ffi_init()' for
'Opaque'.
- New 'task' module with a new type 'Task' ('struct task_struct'),
and a new macro 'current!' to safely get a reference to the current
one.
- New 'ioctl' module with new '_IOC*' const functions (equivalent to
the C macros).
- New 'uapi' crate, intended to be accessible by drivers directly.
- 'macros' crate: new 'quote!' macro (similar to the one provided in
userspace by the 'quote' crate); and the 'module!' macro now allows
specifying multiple module aliases.
- 'error' module:
New associated functions for the 'Error' type, such as
'from_errno()' and new functions such as 'to_result()'.
- 'alloc' crate:
More fallible 'Vec' methods: 'try_resize` and
'try_extend_from_slice' and the infrastructure (imported from the
Rust standard library) they need"
* tag 'rust-6.4' of https://github.com/Rust-for-Linux/linux: (44 commits)
rust: ioctl: Add ioctl number manipulation functions
rust: uapi: Add UAPI crate
rust: sync: introduce `CondVar`
rust: lock: add `Guard::do_unlocked`
rust: sync: introduce `LockedBy`
rust: introduce `current`
rust: add basic `Task`
rust: introduce `ARef`
rust: lock: introduce `SpinLock`
rust: lock: introduce `Mutex`
rust: sync: introduce `Lock` and `Guard`
rust: sync: introduce `LockClassKey`
MAINTAINERS: add Benno Lossin as Rust reviewer
rust: init: broaden the blanket impl of `Init`
rust: sync: add functions for initializing `UniqueArc<MaybeUninit<T>>`
rust: sync: reduce stack usage of `UniqueArc::try_new_uninit`
rust: types: add `Opaque::ffi_init`
rust: prelude: add `pin-init` API items to prelude
rust: init: add `Zeroable` trait and `init::zeroed` function
rust: init: add `stack_pin_init!` macro
...
429 lines
18 KiB
Makefile
429 lines
18 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
|
|
|
|
obj-$(CONFIG_RUST) += core.o compiler_builtins.o
|
|
always-$(CONFIG_RUST) += exports_core_generated.h
|
|
|
|
# Missing prototypes are expected in the helpers since these are exported
|
|
# for Rust only, thus there is no header nor prototypes.
|
|
obj-$(CONFIG_RUST) += helpers.o
|
|
CFLAGS_REMOVE_helpers.o = -Wmissing-prototypes -Wmissing-declarations
|
|
|
|
always-$(CONFIG_RUST) += libmacros.so
|
|
no-clean-files += libmacros.so
|
|
|
|
always-$(CONFIG_RUST) += bindings/bindings_generated.rs bindings/bindings_helpers_generated.rs
|
|
obj-$(CONFIG_RUST) += alloc.o bindings.o kernel.o
|
|
always-$(CONFIG_RUST) += exports_alloc_generated.h exports_bindings_generated.h \
|
|
exports_kernel_generated.h
|
|
|
|
always-$(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
|
|
|
|
# Avoids running `$(RUSTC)` for the sysroot when it may not be available.
|
|
ifdef CONFIG_RUST
|
|
|
|
# `$(rust_flags)` is passed in case the user added `--sysroot`.
|
|
rustc_sysroot := $(shell $(RUSTC) $(rust_flags) --print sysroot)
|
|
rustc_host_target := $(shell $(RUSTC) --version --verbose | grep -F 'host: ' | cut -d' ' -f2)
|
|
RUST_LIB_SRC ?= $(rustc_sysroot)/lib/rustlib/src/rust/library
|
|
|
|
ifeq ($(quiet),silent_)
|
|
cargo_quiet=-q
|
|
rust_test_quiet=-q
|
|
rustdoc_test_quiet=--test-args -q
|
|
else ifeq ($(quiet),quiet_)
|
|
rust_test_quiet=-q
|
|
rustdoc_test_quiet=--test-args -q
|
|
else
|
|
cargo_quiet=--verbose
|
|
endif
|
|
|
|
core-cfgs = \
|
|
--cfg no_fp_fmt_parse
|
|
|
|
alloc-cfgs = \
|
|
--cfg no_borrow \
|
|
--cfg no_fmt \
|
|
--cfg no_global_oom_handling \
|
|
--cfg no_macros \
|
|
--cfg no_rc \
|
|
--cfg no_str \
|
|
--cfg no_string \
|
|
--cfg no_sync \
|
|
--cfg no_thin
|
|
|
|
quiet_cmd_rustdoc = RUSTDOC $(if $(rustdoc_host),H, ) $<
|
|
cmd_rustdoc = \
|
|
OBJTREE=$(abspath $(objtree)) \
|
|
$(RUSTDOC) $(if $(rustdoc_host),$(rust_common_flags),$(rust_flags)) \
|
|
$(rustc_target_flags) -L$(objtree)/$(obj) \
|
|
--output $(objtree)/$(obj)/doc \
|
|
--crate-name $(subst rustdoc-,,$@) \
|
|
@$(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-alloc rustdoc-kernel
|
|
$(Q)cp $(srctree)/Documentation/images/logo.svg $(objtree)/$(obj)/doc
|
|
$(Q)cp $(srctree)/Documentation/images/COPYING-logo $(objtree)/$(obj)/doc
|
|
$(Q)find $(objtree)/$(obj)/doc -name '*.html' -type f -print0 | xargs -0 sed -Ei \
|
|
-e 's:rust-logo\.svg:logo.svg:g' \
|
|
-e 's:rust-logo\.png:logo.svg:g' \
|
|
-e 's:favicon\.svg:logo.svg:g' \
|
|
-e 's:<link rel="alternate icon" type="image/png" href="[./]*favicon-(16x16|32x32)\.png">::g'
|
|
$(Q)echo '.logo-container > img { object-fit: contain; }' \
|
|
>> $(objtree)/$(obj)/doc/rustdoc.css
|
|
|
|
rustdoc-macros: private rustdoc_host = yes
|
|
rustdoc-macros: private rustc_target_flags = --crate-type proc-macro \
|
|
--extern proc_macro
|
|
rustdoc-macros: $(src)/macros/lib.rs FORCE
|
|
$(call if_changed,rustdoc)
|
|
|
|
rustdoc-core: private rustc_target_flags = $(core-cfgs)
|
|
rustdoc-core: $(RUST_LIB_SRC)/core/src/lib.rs FORCE
|
|
$(call if_changed,rustdoc)
|
|
|
|
rustdoc-compiler_builtins: $(src)/compiler_builtins.rs rustdoc-core FORCE
|
|
$(call if_changed,rustdoc)
|
|
|
|
# We need to allow `rustdoc::broken_intra_doc_links` because some
|
|
# `no_global_oom_handling` functions refer to non-`no_global_oom_handling`
|
|
# functions. Ideally `rustdoc` would have a way to distinguish broken links
|
|
# due to things that are "configured out" vs. entirely non-existing ones.
|
|
rustdoc-alloc: private rustc_target_flags = $(alloc-cfgs) \
|
|
-Arustdoc::broken_intra_doc_links
|
|
rustdoc-alloc: $(src)/alloc/lib.rs rustdoc-core rustdoc-compiler_builtins FORCE
|
|
$(call if_changed,rustdoc)
|
|
|
|
rustdoc-kernel: private rustc_target_flags = --extern alloc \
|
|
--extern build_error --extern macros=$(objtree)/$(obj)/libmacros.so \
|
|
--extern bindings --extern uapi
|
|
rustdoc-kernel: $(src)/kernel/lib.rs rustdoc-core rustdoc-macros \
|
|
rustdoc-compiler_builtins rustdoc-alloc $(obj)/libmacros.so \
|
|
$(obj)/bindings.o FORCE
|
|
$(call if_changed,rustdoc)
|
|
|
|
quiet_cmd_rustc_test_library = RUSTC TL $<
|
|
cmd_rustc_test_library = \
|
|
OBJTREE=$(abspath $(objtree)) \
|
|
$(RUSTC) $(rust_common_flags) \
|
|
@$(objtree)/include/generated/rustc_cfg $(rustc_target_flags) \
|
|
--crate-type $(if $(rustc_test_library_proc),proc-macro,rlib) \
|
|
--out-dir $(objtree)/$(obj)/test --cfg testlib \
|
|
--sysroot $(objtree)/$(obj)/test/sysroot \
|
|
-L$(objtree)/$(obj)/test \
|
|
--crate-name $(subst rusttest-,,$(subst rusttestlib-,,$@)) $<
|
|
|
|
rusttestlib-build_error: $(src)/build_error.rs rusttest-prepare FORCE
|
|
$(call if_changed,rustc_test_library)
|
|
|
|
rusttestlib-macros: private rustc_target_flags = --extern proc_macro
|
|
rusttestlib-macros: private rustc_test_library_proc = yes
|
|
rusttestlib-macros: $(src)/macros/lib.rs rusttest-prepare FORCE
|
|
$(call if_changed,rustc_test_library)
|
|
|
|
rusttestlib-bindings: $(src)/bindings/lib.rs rusttest-prepare FORCE
|
|
$(call if_changed,rustc_test_library)
|
|
|
|
rusttestlib-uapi: $(src)/uapi/lib.rs rusttest-prepare FORCE
|
|
$(call if_changed,rustc_test_library)
|
|
|
|
quiet_cmd_rustdoc_test = RUSTDOC T $<
|
|
cmd_rustdoc_test = \
|
|
OBJTREE=$(abspath $(objtree)) \
|
|
$(RUSTDOC) --test $(rust_common_flags) \
|
|
@$(objtree)/include/generated/rustc_cfg \
|
|
$(rustc_target_flags) $(rustdoc_test_target_flags) \
|
|
--sysroot $(objtree)/$(obj)/test/sysroot $(rustdoc_test_quiet) \
|
|
-L$(objtree)/$(obj)/test --output $(objtree)/$(obj)/doc \
|
|
--crate-name $(subst rusttest-,,$@) $<
|
|
|
|
# We cannot use `-Zpanic-abort-tests` because some tests are dynamic,
|
|
# so for the moment we skip `-Cpanic=abort`.
|
|
quiet_cmd_rustc_test = RUSTC T $<
|
|
cmd_rustc_test = \
|
|
OBJTREE=$(abspath $(objtree)) \
|
|
$(RUSTC) --test $(rust_common_flags) \
|
|
@$(objtree)/include/generated/rustc_cfg \
|
|
$(rustc_target_flags) --out-dir $(objtree)/$(obj)/test \
|
|
--sysroot $(objtree)/$(obj)/test/sysroot \
|
|
-L$(objtree)/$(obj)/test \
|
|
--crate-name $(subst rusttest-,,$@) $<; \
|
|
$(objtree)/$(obj)/test/$(subst rusttest-,,$@) $(rust_test_quiet) \
|
|
$(rustc_test_run_flags)
|
|
|
|
rusttest: rusttest-macros rusttest-kernel
|
|
|
|
# This prepares a custom sysroot with our custom `alloc` instead of
|
|
# the standard one.
|
|
#
|
|
# This requires several hacks:
|
|
# - Unlike `core` and `alloc`, `std` depends on more than a dozen crates,
|
|
# including third-party crates that need to be downloaded, plus custom
|
|
# `build.rs` steps. Thus hardcoding things here is not maintainable.
|
|
# - `cargo` knows how to build the standard library, but it is an unstable
|
|
# feature so far (`-Zbuild-std`).
|
|
# - `cargo` only considers the use case of building the standard library
|
|
# to use it in a given package. Thus we need to create a dummy package
|
|
# and pick the generated libraries from there.
|
|
# - Since we only keep a subset of upstream `alloc` in-tree, we need
|
|
# to recreate it on the fly by putting our sources on top.
|
|
# - The usual ways of modifying the dependency graph in `cargo` do not seem
|
|
# to apply for the `-Zbuild-std` steps, thus we have to mislead it
|
|
# by modifying the sources in the sysroot.
|
|
# - To avoid messing with the user's Rust installation, we create a clone
|
|
# of the sysroot. However, `cargo` ignores `RUSTFLAGS` in the `-Zbuild-std`
|
|
# steps, thus we use a wrapper binary passed via `RUSTC` to pass the flag.
|
|
#
|
|
# In the future, we hope to avoid the whole ordeal by either:
|
|
# - Making the `test` crate not depend on `std` (either improving upstream
|
|
# or having our own custom crate).
|
|
# - Making the tests run in kernel space (requires the previous point).
|
|
# - Making `std` and friends be more like a "normal" crate, so that
|
|
# `-Zbuild-std` and related hacks are not needed.
|
|
quiet_cmd_rustsysroot = RUSTSYSROOT
|
|
cmd_rustsysroot = \
|
|
rm -rf $(objtree)/$(obj)/test; \
|
|
mkdir -p $(objtree)/$(obj)/test; \
|
|
cp -a $(rustc_sysroot) $(objtree)/$(obj)/test/sysroot; \
|
|
cp -r $(srctree)/$(src)/alloc/* \
|
|
$(objtree)/$(obj)/test/sysroot/lib/rustlib/src/rust/library/alloc/src; \
|
|
echo '\#!/bin/sh' > $(objtree)/$(obj)/test/rustc_sysroot; \
|
|
echo "$(RUSTC) --sysroot=$(abspath $(objtree)/$(obj)/test/sysroot) \"\$$@\"" \
|
|
>> $(objtree)/$(obj)/test/rustc_sysroot; \
|
|
chmod u+x $(objtree)/$(obj)/test/rustc_sysroot; \
|
|
$(CARGO) -q new $(objtree)/$(obj)/test/dummy; \
|
|
RUSTC=$(objtree)/$(obj)/test/rustc_sysroot $(CARGO) $(cargo_quiet) \
|
|
test -Zbuild-std --target $(rustc_host_target) \
|
|
--manifest-path $(objtree)/$(obj)/test/dummy/Cargo.toml; \
|
|
rm $(objtree)/$(obj)/test/sysroot/lib/rustlib/$(rustc_host_target)/lib/*; \
|
|
cp $(objtree)/$(obj)/test/dummy/target/$(rustc_host_target)/debug/deps/* \
|
|
$(objtree)/$(obj)/test/sysroot/lib/rustlib/$(rustc_host_target)/lib
|
|
|
|
rusttest-prepare: FORCE
|
|
$(call if_changed,rustsysroot)
|
|
|
|
rusttest-macros: private rustc_target_flags = --extern proc_macro
|
|
rusttest-macros: private rustdoc_test_target_flags = --crate-type proc-macro
|
|
rusttest-macros: $(src)/macros/lib.rs rusttest-prepare FORCE
|
|
$(call if_changed,rustc_test)
|
|
$(call if_changed,rustdoc_test)
|
|
|
|
rusttest-kernel: private rustc_target_flags = --extern alloc \
|
|
--extern build_error --extern macros --extern bindings --extern uapi
|
|
rusttest-kernel: $(src)/kernel/lib.rs rusttest-prepare \
|
|
rusttestlib-build_error rusttestlib-macros rusttestlib-bindings \
|
|
rusttestlib-uapi FORCE
|
|
$(call if_changed,rustc_test)
|
|
$(call if_changed,rustc_test_library)
|
|
|
|
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 \
|
|
-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 \
|
|
--param=% --param asan-%
|
|
|
|
# Derived from `scripts/Makefile.clang`.
|
|
BINDGEN_TARGET_x86 := x86_64-linux-gnu
|
|
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
|
|
|
|
bindgen_c_flags_final = $(bindgen_c_flags_lto) -D__BINDGEN__
|
|
|
|
quiet_cmd_bindgen = BINDGEN $@
|
|
cmd_bindgen = \
|
|
$(BINDGEN) $< $(bindgen_target_flags) \
|
|
--use-core --with-derive-default --ctypes-prefix core::ffi --no-layout-tests \
|
|
--no-debug '.*' \
|
|
--size_t-is-usize -o $@ -- $(bindgen_c_flags_final) -DMODULE \
|
|
$(bindgen_target_cflags) $(bindgen_target_extra)
|
|
|
|
$(obj)/bindings/bindings_generated.rs: private bindgen_target_flags = \
|
|
$(shell grep -v '^#\|^$$' $(srctree)/$(src)/bindgen_parameters)
|
|
$(obj)/bindings/bindings_generated.rs: $(src)/bindings/bindings_helper.h \
|
|
$(src)/bindgen_parameters FORCE
|
|
$(call if_changed_dep,bindgen)
|
|
|
|
$(obj)/uapi/uapi_generated.rs: private bindgen_target_flags = \
|
|
$(shell grep -v '^#\|^$$' $(srctree)/$(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 = \
|
|
--blacklist-type '.*' --whitelist-var '' \
|
|
--whitelist-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.c FORCE
|
|
$(call if_changed_dep,bindgen)
|
|
|
|
quiet_cmd_exports = EXPORTS $@
|
|
cmd_exports = \
|
|
$(NM) -p --defined-only $< \
|
|
| grep -E ' (T|R|D) ' | cut -d ' ' -f 3 \
|
|
| xargs -Isymbol \
|
|
echo 'EXPORT_SYMBOL_RUST_GPL(symbol);' > $@
|
|
|
|
$(obj)/exports_core_generated.h: $(obj)/core.o FORCE
|
|
$(call if_changed,exports)
|
|
|
|
$(obj)/exports_alloc_generated.h: $(obj)/alloc.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_procmacro = $(RUSTC_OR_CLIPPY_QUIET) P $@
|
|
cmd_rustc_procmacro = \
|
|
$(RUSTC_OR_CLIPPY) $(rust_common_flags) \
|
|
--emit=dep-info=$(depfile) --emit=link=$@ --extern proc_macro \
|
|
--crate-type proc-macro \
|
|
--crate-name $(patsubst lib%.so,%,$(notdir $@)) $<
|
|
|
|
# Procedural macros can only be used with the `rustc` that compiled it.
|
|
# Therefore, to get `libmacros.so` automatically recompiled when the compiler
|
|
# version changes, we add `core.o` as a dependency (even if it is not needed).
|
|
$(obj)/libmacros.so: $(src)/macros/lib.rs $(obj)/core.o FORCE
|
|
$(call if_changed_dep,rustc_procmacro)
|
|
|
|
quiet_cmd_rustc_library = $(if $(skip_clippy),RUSTC,$(RUSTC_OR_CLIPPY_QUIET)) L $@
|
|
cmd_rustc_library = \
|
|
OBJTREE=$(abspath $(objtree)) \
|
|
$(if $(skip_clippy),$(RUSTC),$(RUSTC_OR_CLIPPY)) \
|
|
$(filter-out $(skip_flags),$(rust_flags) $(rustc_target_flags)) \
|
|
--emit=dep-info=$(depfile) --emit=obj=$@ \
|
|
--emit=metadata=$(dir $@)$(patsubst %.o,lib%.rmeta,$(notdir $@)) \
|
|
--crate-type rlib -L$(objtree)/$(obj) \
|
|
--crate-name $(patsubst %.o,%,$(notdir $@)) $< \
|
|
$(if $(rustc_objcopy),;$(OBJCOPY) $(rustc_objcopy) $@)
|
|
|
|
rust-analyzer:
|
|
$(Q)$(srctree)/scripts/generate_rust_analyzer.py $(srctree) $(objtree) \
|
|
$(RUST_LIB_SRC) > $(objtree)/rust-project.json
|
|
|
|
redirect-intrinsics = \
|
|
__eqsf2 __gesf2 __lesf2 __nesf2 __unordsf2 \
|
|
__unorddf2 \
|
|
__muloti4 __multi3 \
|
|
__udivmodti4 __udivti3 __umodti3
|
|
|
|
ifneq ($(or $(CONFIG_ARM64),$(and $(CONFIG_RISCV),$(CONFIG_64BIT))),)
|
|
# These intrinsics are defined for ARM64 and RISCV64
|
|
redirect-intrinsics += \
|
|
__ashrti3 \
|
|
__ashlti3 __lshrti3
|
|
endif
|
|
|
|
$(obj)/core.o: private skip_clippy = 1
|
|
$(obj)/core.o: private skip_flags = -Dunreachable_pub
|
|
$(obj)/core.o: private rustc_objcopy = $(foreach sym,$(redirect-intrinsics),--redefine-sym $(sym)=__rust$(sym))
|
|
$(obj)/core.o: private rustc_target_flags = $(core-cfgs)
|
|
$(obj)/core.o: $(RUST_LIB_SRC)/core/src/lib.rs scripts/target.json FORCE
|
|
$(call if_changed_dep,rustc_library)
|
|
|
|
$(obj)/compiler_builtins.o: private rustc_objcopy = -w -W '__*'
|
|
$(obj)/compiler_builtins.o: $(src)/compiler_builtins.rs $(obj)/core.o FORCE
|
|
$(call if_changed_dep,rustc_library)
|
|
|
|
$(obj)/alloc.o: private skip_clippy = 1
|
|
$(obj)/alloc.o: private skip_flags = -Dunreachable_pub
|
|
$(obj)/alloc.o: private rustc_target_flags = $(alloc-cfgs)
|
|
$(obj)/alloc.o: $(src)/alloc/lib.rs $(obj)/compiler_builtins.o FORCE
|
|
$(call if_changed_dep,rustc_library)
|
|
|
|
$(obj)/build_error.o: $(src)/build_error.rs $(obj)/compiler_builtins.o FORCE
|
|
$(call if_changed_dep,rustc_library)
|
|
|
|
$(obj)/bindings.o: $(src)/bindings/lib.rs \
|
|
$(obj)/compiler_builtins.o \
|
|
$(obj)/bindings/bindings_generated.rs \
|
|
$(obj)/bindings/bindings_helpers_generated.rs FORCE
|
|
$(call if_changed_dep,rustc_library)
|
|
|
|
$(obj)/uapi.o: $(src)/uapi/lib.rs \
|
|
$(obj)/compiler_builtins.o \
|
|
$(obj)/uapi/uapi_generated.rs FORCE
|
|
$(call if_changed_dep,rustc_library)
|
|
|
|
$(obj)/kernel.o: private rustc_target_flags = --extern alloc \
|
|
--extern build_error --extern macros --extern bindings --extern uapi
|
|
$(obj)/kernel.o: $(src)/kernel/lib.rs $(obj)/alloc.o $(obj)/build_error.o \
|
|
$(obj)/libmacros.so $(obj)/bindings.o $(obj)/uapi.o FORCE
|
|
$(call if_changed_dep,rustc_library)
|
|
|
|
endif # CONFIG_RUST
|