mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-12-28 16:56:26 +00:00
Kbuild: add Rust support
Having most of the new files in place, we now enable Rust support in the build system, including `Kconfig` entries related to Rust, the Rust configuration printer and a few other bits. Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Tested-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Co-developed-by: Alex Gaynor <alex.gaynor@gmail.com> Signed-off-by: Alex Gaynor <alex.gaynor@gmail.com> Co-developed-by: Finn Behrens <me@kloenk.de> Signed-off-by: Finn Behrens <me@kloenk.de> Co-developed-by: Adam Bratschi-Kaye <ark.email@gmail.com> Signed-off-by: Adam Bratschi-Kaye <ark.email@gmail.com> Co-developed-by: Wedson Almeida Filho <wedsonaf@google.com> Signed-off-by: Wedson Almeida Filho <wedsonaf@google.com> Co-developed-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Co-developed-by: Sven Van Asbroeck <thesven73@gmail.com> Signed-off-by: Sven Van Asbroeck <thesven73@gmail.com> Co-developed-by: Gary Guo <gary@garyguo.net> Signed-off-by: Gary Guo <gary@garyguo.net> Co-developed-by: Boris-Chengbiao Zhou <bobo1239@web.de> Signed-off-by: Boris-Chengbiao Zhou <bobo1239@web.de> Co-developed-by: Boqun Feng <boqun.feng@gmail.com> Signed-off-by: Boqun Feng <boqun.feng@gmail.com> Co-developed-by: Douglas Su <d0u9.su@outlook.com> Signed-off-by: Douglas Su <d0u9.su@outlook.com> Co-developed-by: Dariusz Sosnowski <dsosnowski@dsosnowski.pl> Signed-off-by: Dariusz Sosnowski <dsosnowski@dsosnowski.pl> Co-developed-by: Antonio Terceiro <antonio.terceiro@linaro.org> Signed-off-by: Antonio Terceiro <antonio.terceiro@linaro.org> Co-developed-by: Daniel Xu <dxu@dxuuu.xyz> Signed-off-by: Daniel Xu <dxu@dxuuu.xyz> Co-developed-by: Björn Roy Baron <bjorn3_gh@protonmail.com> Signed-off-by: Björn Roy Baron <bjorn3_gh@protonmail.com> Co-developed-by: Martin Rodriguez Reboredo <yakoyoku@gmail.com> Signed-off-by: Martin Rodriguez Reboredo <yakoyoku@gmail.com> Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
This commit is contained in:
Miguel Ojeda
parent
80db40bac8
commit
2f7ab1267d
2
.gitignore
vendored
2
.gitignore
vendored
@ -37,6 +37,8 @@
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*.o
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*.o.*
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*.patch
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*.rmeta
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*.rsi
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*.s
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*.so
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*.so.dbg
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172
Makefile
172
Makefile
@ -120,6 +120,15 @@ endif
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export KBUILD_CHECKSRC
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# Enable "clippy" (a linter) as part of the Rust compilation.
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#
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# Use 'make CLIPPY=1' to enable it.
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ifeq ("$(origin CLIPPY)", "command line")
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KBUILD_CLIPPY := $(CLIPPY)
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endif
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export KBUILD_CLIPPY
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# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
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# directory of external module to build. Setting M= takes precedence.
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ifeq ("$(origin M)", "command line")
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@ -270,14 +279,14 @@ no-dot-config-targets := $(clean-targets) \
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cscope gtags TAGS tags help% %docs check% coccicheck \
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$(version_h) headers headers_% archheaders archscripts \
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%asm-generic kernelversion %src-pkg dt_binding_check \
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outputmakefile
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outputmakefile rustavailable rustfmt rustfmtcheck
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# Installation targets should not require compiler. Unfortunately, vdso_install
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# is an exception where build artifacts may be updated. This must be fixed.
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no-compiler-targets := $(no-dot-config-targets) install dtbs_install \
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headers_install modules_install kernelrelease image_name
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no-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \
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image_name
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single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
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single-targets := %.a %.i %.rsi %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
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config-build :=
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mixed-build :=
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@ -439,6 +448,7 @@ else
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HOSTCC = gcc
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HOSTCXX = g++
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endif
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HOSTRUSTC = rustc
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HOSTPKG_CONFIG = pkg-config
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KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \
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@ -447,8 +457,26 @@ KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \
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KBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(USERCFLAGS)
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KBUILD_USERLDFLAGS := $(USERLDFLAGS)
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# These flags apply to all Rust code in the tree, including the kernel and
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# host programs.
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export rust_common_flags := --edition=2021 \
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-Zbinary_dep_depinfo=y \
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-Dunsafe_op_in_unsafe_fn -Drust_2018_idioms \
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-Dunreachable_pub -Dnon_ascii_idents \
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-Wmissing_docs \
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-Drustdoc::missing_crate_level_docs \
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-Dclippy::correctness -Dclippy::style \
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-Dclippy::suspicious -Dclippy::complexity \
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-Dclippy::perf \
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-Dclippy::let_unit_value -Dclippy::mut_mut \
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-Dclippy::needless_bitwise_bool \
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-Dclippy::needless_continue \
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-Wclippy::dbg_macro
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KBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS)
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KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
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KBUILD_HOSTRUSTFLAGS := $(rust_common_flags) -O -Cstrip=debuginfo \
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-Zallow-features= $(HOSTRUSTFLAGS)
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KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
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KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
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@ -473,6 +501,12 @@ OBJDUMP = $(CROSS_COMPILE)objdump
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READELF = $(CROSS_COMPILE)readelf
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STRIP = $(CROSS_COMPILE)strip
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endif
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RUSTC = rustc
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RUSTDOC = rustdoc
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RUSTFMT = rustfmt
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CLIPPY_DRIVER = clippy-driver
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BINDGEN = bindgen
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CARGO = cargo
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PAHOLE = pahole
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RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids
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LEX = flex
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@ -498,9 +532,11 @@ CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
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-Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
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NOSTDINC_FLAGS :=
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CFLAGS_MODULE =
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RUSTFLAGS_MODULE =
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AFLAGS_MODULE =
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LDFLAGS_MODULE =
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CFLAGS_KERNEL =
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RUSTFLAGS_KERNEL =
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AFLAGS_KERNEL =
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LDFLAGS_vmlinux =
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@ -529,15 +565,43 @@ KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
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-Werror=return-type -Wno-format-security \
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-std=gnu11
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KBUILD_CPPFLAGS := -D__KERNEL__
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KBUILD_RUSTFLAGS := $(rust_common_flags) \
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--target=$(objtree)/rust/target.json \
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-Cpanic=abort -Cembed-bitcode=n -Clto=n \
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-Cforce-unwind-tables=n -Ccodegen-units=1 \
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-Csymbol-mangling-version=v0 \
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-Crelocation-model=static \
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-Zfunction-sections=n \
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-Dclippy::float_arithmetic
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KBUILD_AFLAGS_KERNEL :=
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KBUILD_CFLAGS_KERNEL :=
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KBUILD_RUSTFLAGS_KERNEL :=
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KBUILD_AFLAGS_MODULE := -DMODULE
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KBUILD_CFLAGS_MODULE := -DMODULE
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KBUILD_RUSTFLAGS_MODULE := --cfg MODULE
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KBUILD_LDFLAGS_MODULE :=
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KBUILD_LDFLAGS :=
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CLANG_FLAGS :=
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ifeq ($(KBUILD_CLIPPY),1)
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RUSTC_OR_CLIPPY_QUIET := CLIPPY
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RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER)
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else
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RUSTC_OR_CLIPPY_QUIET := RUSTC
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RUSTC_OR_CLIPPY = $(RUSTC)
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endif
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ifdef RUST_LIB_SRC
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export RUST_LIB_SRC
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endif
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# Allows the usage of unstable features in stable compilers.
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export RUSTC_BOOTSTRAP := 1
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export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC HOSTPKG_CONFIG
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export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_QUIET RUSTC_OR_CLIPPY BINDGEN CARGO
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export HOSTRUSTC KBUILD_HOSTRUSTFLAGS
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export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL
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export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
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export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD
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@ -546,9 +610,10 @@ export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS
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export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
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export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
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export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTFLAGS_MODULE
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export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
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export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
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export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
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export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_RUSTFLAGS_MODULE KBUILD_LDFLAGS_MODULE
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export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL KBUILD_RUSTFLAGS_KERNEL
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export PAHOLE_FLAGS
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# Files to ignore in find ... statements
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@ -729,7 +794,7 @@ $(KCONFIG_CONFIG):
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#
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# Do not use $(call cmd,...) here. That would suppress prompts from syncconfig,
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# so you cannot notice that Kconfig is waiting for the user input.
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%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG)
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%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h %/generated/rustc_cfg: $(KCONFIG_CONFIG)
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$(Q)$(kecho) " SYNC $@"
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$(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
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else # !may-sync-config
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@ -758,10 +823,17 @@ KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
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ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
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KBUILD_CFLAGS += -O2
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KBUILD_RUSTFLAGS += -Copt-level=2
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else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
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KBUILD_CFLAGS += -Os
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KBUILD_RUSTFLAGS += -Copt-level=s
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endif
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# Always set `debug-assertions` and `overflow-checks` because their default
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# depends on `opt-level` and `debug-assertions`, respectively.
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KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $(CONFIG_RUST_DEBUG_ASSERTIONS),y,n)
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KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(CONFIG_RUST_OVERFLOW_CHECKS),y,n)
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# Tell gcc to never replace conditional load with a non-conditional one
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ifdef CONFIG_CC_IS_GCC
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# gcc-10 renamed --param=allow-store-data-races=0 to
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@ -792,6 +864,9 @@ KBUILD_CFLAGS-$(CONFIG_WERROR) += -Werror
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KBUILD_CFLAGS-$(CONFIG_CC_NO_ARRAY_BOUNDS) += -Wno-array-bounds
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KBUILD_CFLAGS += $(KBUILD_CFLAGS-y) $(CONFIG_CC_IMPLICIT_FALLTHROUGH)
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KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarnings
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KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y)
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ifdef CONFIG_CC_IS_CLANG
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KBUILD_CPPFLAGS += -Qunused-arguments
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# The kernel builds with '-std=gnu11' so use of GNU extensions is acceptable.
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@ -812,12 +887,15 @@ KBUILD_CFLAGS += $(call cc-disable-warning, dangling-pointer)
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ifdef CONFIG_FRAME_POINTER
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KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
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KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y
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else
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# Some targets (ARM with Thumb2, for example), can't be built with frame
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# pointers. For those, we don't have FUNCTION_TRACER automatically
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# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
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# incompatible with -fomit-frame-pointer with current GCC, so we don't use
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# -fomit-frame-pointer with FUNCTION_TRACER.
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# In the Rust target specification, "frame-pointer" is set explicitly
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# to "may-omit".
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ifndef CONFIG_FUNCTION_TRACER
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KBUILD_CFLAGS += -fomit-frame-pointer
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endif
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@ -882,8 +960,10 @@ ifdef CONFIG_DEBUG_SECTION_MISMATCH
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KBUILD_CFLAGS += -fno-inline-functions-called-once
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endif
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# `rustc`'s `-Zfunction-sections` applies to data too (as of 1.59.0).
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ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
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KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
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KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections=y
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LDFLAGS_vmlinux += --gc-sections
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endif
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@ -1026,10 +1106,11 @@ include $(addprefix $(srctree)/, $(include-y))
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# Do not add $(call cc-option,...) below this line. When you build the kernel
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# from the clean source tree, the GCC plugins do not exist at this point.
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# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
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# Add user supplied CPPFLAGS, AFLAGS, CFLAGS and RUSTFLAGS as the last assignments
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KBUILD_CPPFLAGS += $(KCPPFLAGS)
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KBUILD_AFLAGS += $(KAFLAGS)
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KBUILD_CFLAGS += $(KCFLAGS)
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KBUILD_RUSTFLAGS += $(KRUSTFLAGS)
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KBUILD_LDFLAGS_MODULE += --build-id=sha1
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LDFLAGS_vmlinux += --build-id=sha1
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@ -1104,6 +1185,7 @@ ifeq ($(KBUILD_EXTMOD),)
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core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/
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core-$(CONFIG_BLOCK) += block/
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core-$(CONFIG_IO_URING) += io_uring/
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core-$(CONFIG_RUST) += rust/
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vmlinux-dirs := $(patsubst %/,%,$(filter %/, \
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$(core-y) $(core-m) $(drivers-y) $(drivers-m) \
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@ -1206,6 +1288,10 @@ prepare0: archprepare
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# All the preparing..
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prepare: prepare0
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ifdef CONFIG_RUST
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$(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh -v
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$(Q)$(MAKE) $(build)=rust
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endif
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PHONY += remove-stale-files
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remove-stale-files:
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@ -1499,7 +1585,7 @@ endif # CONFIG_MODULES
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# Directories & files removed with 'make clean'
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CLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \
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modules.builtin modules.builtin.modinfo modules.nsdeps \
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compile_commands.json .thinlto-cache
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compile_commands.json .thinlto-cache rust/test rust/doc
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# Directories & files removed with 'make mrproper'
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MRPROPER_FILES += include/config include/generated \
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@ -1510,7 +1596,8 @@ MRPROPER_FILES += include/config include/generated \
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certs/signing_key.pem \
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certs/x509.genkey \
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vmlinux-gdb.py \
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*.spec
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*.spec \
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rust/target.json rust/libmacros.so
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# clean - Delete most, but leave enough to build external modules
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#
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@ -1535,6 +1622,9 @@ $(mrproper-dirs):
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mrproper: clean $(mrproper-dirs)
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$(call cmd,rmfiles)
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@find . $(RCS_FIND_IGNORE) \
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\( -name '*.rmeta' \) \
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-type f -print | xargs rm -f
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# distclean
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#
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@ -1622,6 +1712,24 @@ help:
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@echo ' kselftest-merge - Merge all the config dependencies of'
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@echo ' kselftest to existing .config.'
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@echo ''
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@echo 'Rust targets:'
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@echo ' rustavailable - Checks whether the Rust toolchain is'
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@echo ' available and, if not, explains why.'
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@echo ' rustfmt - Reformat all the Rust code in the kernel'
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@echo ' rustfmtcheck - Checks if all the Rust code in the kernel'
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@echo ' is formatted, printing a diff otherwise.'
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@echo ' rustdoc - Generate Rust documentation'
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@echo ' (requires kernel .config)'
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@echo ' rusttest - Runs the Rust tests'
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@echo ' (requires kernel .config; downloads external repos)'
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@echo ' rust-analyzer - Generate rust-project.json rust-analyzer support file'
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@echo ' (requires kernel .config)'
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@echo ' dir/file.[os] - Build specified target only'
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@echo ' dir/file.rsi - Build macro expanded source, similar to C preprocessing.'
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@echo ' Run with RUSTFMT=n to skip reformatting if needed.'
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@echo ' The output is not intended to be compilable.'
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@echo ' dir/file.ll - Build the LLVM assembly file'
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@echo ''
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@$(if $(dtstree), \
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echo 'Devicetree:'; \
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echo '* dtbs - Build device tree blobs for enabled boards'; \
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@ -1694,6 +1802,52 @@ PHONY += $(DOC_TARGETS)
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$(DOC_TARGETS):
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$(Q)$(MAKE) $(build)=Documentation $@
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# Rust targets
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# ---------------------------------------------------------------------------
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# "Is Rust available?" target
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PHONY += rustavailable
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rustavailable:
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$(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh -v && echo "Rust is available!"
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# Documentation target
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#
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# Using the singular to avoid running afoul of `no-dot-config-targets`.
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PHONY += rustdoc
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rustdoc: prepare
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$(Q)$(MAKE) $(build)=rust $@
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# Testing target
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PHONY += rusttest
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rusttest: prepare
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$(Q)$(MAKE) $(build)=rust $@
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# Formatting targets
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PHONY += rustfmt rustfmtcheck
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# We skip `rust/alloc` since we want to minimize the diff w.r.t. upstream.
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#
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# We match using absolute paths since `find` does not resolve them
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# when matching, which is a problem when e.g. `srctree` is `..`.
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# We `grep` afterwards in order to remove the directory entry itself.
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rustfmt:
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$(Q)find $(abs_srctree) -type f -name '*.rs' \
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-o -path $(abs_srctree)/rust/alloc -prune \
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-o -path $(abs_objtree)/rust/test -prune \
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| grep -Fv $(abs_srctree)/rust/alloc \
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| grep -Fv $(abs_objtree)/rust/test \
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| grep -Fv generated \
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| xargs $(RUSTFMT) $(rustfmt_flags)
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rustfmtcheck: rustfmt_flags = --check
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rustfmtcheck: rustfmt
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# IDE support targets
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PHONY += rust-analyzer
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rust-analyzer:
|
||||
$(Q)$(MAKE) $(build)=rust $@
|
||||
|
||||
# Misc
|
||||
# ---------------------------------------------------------------------------
|
||||
|
||||
@ -1861,7 +2015,7 @@ $(clean-dirs):
|
||||
clean: $(clean-dirs)
|
||||
$(call cmd,rmfiles)
|
||||
@find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
|
||||
\( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
|
||||
\( -name '*.[aios]' -o -name '*.rsi' -o -name '*.ko' -o -name '.*.cmd' \
|
||||
-o -name '*.ko.*' \
|
||||
-o -name '*.dtb' -o -name '*.dtbo' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
|
||||
-o -name '*.dwo' -o -name '*.lst' \
|
||||
|
||||
@ -355,6 +355,12 @@ config HAVE_RSEQ
|
||||
This symbol should be selected by an architecture if it
|
||||
supports an implementation of restartable sequences.
|
||||
|
||||
config HAVE_RUST
|
||||
bool
|
||||
help
|
||||
This symbol should be selected by an architecture if it
|
||||
supports Rust.
|
||||
|
||||
config HAVE_FUNCTION_ARG_ACCESS_API
|
||||
bool
|
||||
help
|
||||
|
||||
@ -4,8 +4,12 @@
|
||||
|
||||
#ifndef __ASSEMBLY__
|
||||
|
||||
/*
|
||||
* Skipped when running bindgen due to a libclang issue;
|
||||
* see https://github.com/rust-lang/rust-bindgen/issues/2244.
|
||||
*/
|
||||
#if defined(CONFIG_DEBUG_INFO_BTF) && defined(CONFIG_PAHOLE_HAS_BTF_TAG) && \
|
||||
__has_attribute(btf_type_tag)
|
||||
__has_attribute(btf_type_tag) && !defined(__BINDGEN__)
|
||||
# define BTF_TYPE_TAG(value) __attribute__((btf_type_tag(#value)))
|
||||
#else
|
||||
# define BTF_TYPE_TAG(value) /* nothing */
|
||||
|
||||
46
init/Kconfig
46
init/Kconfig
@ -60,6 +60,17 @@ config LLD_VERSION
|
||||
default $(ld-version) if LD_IS_LLD
|
||||
default 0
|
||||
|
||||
config RUST_IS_AVAILABLE
|
||||
def_bool $(success,$(srctree)/scripts/rust_is_available.sh)
|
||||
help
|
||||
This shows whether a suitable Rust toolchain is available (found).
|
||||
|
||||
Please see Documentation/rust/quick-start.rst for instructions on how
|
||||
to satify the build requirements of Rust support.
|
||||
|
||||
In particular, the Makefile target 'rustavailable' is useful to check
|
||||
why the Rust toolchain is not being detected.
|
||||
|
||||
config CC_CAN_LINK
|
||||
bool
|
||||
default $(success,$(srctree)/scripts/cc-can-link.sh $(CC) $(CLANG_FLAGS) $(USERCFLAGS) $(USERLDFLAGS) $(m64-flag)) if 64BIT
|
||||
@ -147,7 +158,8 @@ config WERROR
|
||||
default COMPILE_TEST
|
||||
help
|
||||
A kernel build should not cause any compiler warnings, and this
|
||||
enables the '-Werror' flag to enforce that rule by default.
|
||||
enables the '-Werror' (for C) and '-Dwarnings' (for Rust) flags
|
||||
to enforce that rule by default.
|
||||
|
||||
However, if you have a new (or very old) compiler with odd and
|
||||
unusual warnings, or you have some architecture with problems,
|
||||
@ -1899,6 +1911,38 @@ config PROFILING
|
||||
Say Y here to enable the extended profiling support mechanisms used
|
||||
by profilers.
|
||||
|
||||
config RUST
|
||||
bool "Rust support"
|
||||
depends on HAVE_RUST
|
||||
depends on RUST_IS_AVAILABLE
|
||||
depends on !MODVERSIONS
|
||||
depends on !GCC_PLUGINS
|
||||
depends on !RANDSTRUCT
|
||||
depends on !DEBUG_INFO_BTF
|
||||
select CONSTRUCTORS
|
||||
help
|
||||
Enables Rust support in the kernel.
|
||||
|
||||
This allows other Rust-related options, like drivers written in Rust,
|
||||
to be selected.
|
||||
|
||||
It is also required to be able to load external kernel modules
|
||||
written in Rust.
|
||||
|
||||
See Documentation/rust/ for more information.
|
||||
|
||||
If unsure, say N.
|
||||
|
||||
config RUSTC_VERSION_TEXT
|
||||
string
|
||||
depends on RUST
|
||||
default $(shell,command -v $(RUSTC) >/dev/null 2>&1 && $(RUSTC) --version || echo n)
|
||||
|
||||
config BINDGEN_VERSION_TEXT
|
||||
string
|
||||
depends on RUST
|
||||
default $(shell,command -v $(BINDGEN) >/dev/null 2>&1 && $(BINDGEN) --version || echo n)
|
||||
|
||||
#
|
||||
# Place an empty function call at each tracepoint site. Can be
|
||||
# dynamically changed for a probe function.
|
||||
|
||||
1
kernel/configs/rust.config
Normal file
1
kernel/configs/rust.config
Normal file
@ -0,0 +1 @@
|
||||
CONFIG_RUST=y
|
||||
@ -2710,6 +2710,40 @@ config HYPERV_TESTING
|
||||
|
||||
endmenu # "Kernel Testing and Coverage"
|
||||
|
||||
menu "Rust hacking"
|
||||
|
||||
config RUST_DEBUG_ASSERTIONS
|
||||
bool "Debug assertions"
|
||||
depends on RUST
|
||||
help
|
||||
Enables rustc's `-Cdebug-assertions` codegen option.
|
||||
|
||||
This flag lets you turn `cfg(debug_assertions)` conditional
|
||||
compilation on or off. This can be used to enable extra debugging
|
||||
code in development but not in production. For example, it controls
|
||||
the behavior of the standard library's `debug_assert!` macro.
|
||||
|
||||
Note that this will apply to all Rust code, including `core`.
|
||||
|
||||
If unsure, say N.
|
||||
|
||||
config RUST_OVERFLOW_CHECKS
|
||||
bool "Overflow checks"
|
||||
default y
|
||||
depends on RUST
|
||||
help
|
||||
Enables rustc's `-Coverflow-checks` codegen option.
|
||||
|
||||
This flag allows you to control the behavior of runtime integer
|
||||
overflow. When overflow-checks are enabled, a Rust panic will occur
|
||||
on overflow.
|
||||
|
||||
Note that this will apply to all Rust code, including `core`.
|
||||
|
||||
If unsure, say Y.
|
||||
|
||||
endmenu # "Rust"
|
||||
|
||||
source "Documentation/Kconfig"
|
||||
|
||||
endmenu # Kernel hacking
|
||||
|
||||
8
rust/.gitignore
vendored
Normal file
8
rust/.gitignore
vendored
Normal file
@ -0,0 +1,8 @@
|
||||
# SPDX-License-Identifier: GPL-2.0
|
||||
|
||||
target.json
|
||||
bindings_generated.rs
|
||||
bindings_helpers_generated.rs
|
||||
exports_*_generated.h
|
||||
doc/
|
||||
test/
|
||||
381
rust/Makefile
Normal file
381
rust/Makefile
Normal file
@ -0,0 +1,381 @@
|
||||
# SPDX-License-Identifier: GPL-2.0
|
||||
|
||||
always-$(CONFIG_RUST) += target.json
|
||||
no-clean-files += target.json
|
||||
|
||||
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-$(CONFIG_RUST) += exports_alloc_generated.h exports_bindings_generated.h \
|
||||
exports_kernel_generated.h
|
||||
|
||||
obj-$(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_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
|
||||
$(call if_changed,rustdoc)
|
||||
|
||||
rustdoc-kernel: private rustc_target_flags = --extern alloc \
|
||||
--extern macros=$(objtree)/$(obj)/libmacros.so \
|
||||
--extern bindings
|
||||
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-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)
|
||||
|
||||
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 macros --extern bindings
|
||||
rusttest-kernel: $(src)/kernel/lib.rs rusttest-prepare \
|
||||
rusttestlib-macros rusttestlib-bindings FORCE
|
||||
$(call if_changed,rustc_test)
|
||||
$(call if_changed,rustc_test_library)
|
||||
|
||||
filechk_rust_target = $(objtree)/scripts/generate_rust_target < $<
|
||||
|
||||
$(obj)/target.json: $(objtree)/include/config/auto.conf FORCE
|
||||
$(call filechk,rust_target)
|
||||
|
||||
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)
|
||||
|
||||
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)
|
||||
|
||||
# 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,link --extern proc_macro \
|
||||
--crate-type proc-macro --out-dir $(objtree)/$(obj) \
|
||||
--crate-name $(patsubst lib%.so,%,$(notdir $@)) $<; \
|
||||
mv $(objtree)/$(obj)/$(patsubst lib%.so,%,$(notdir $@)).d $(depfile); \
|
||||
sed -i '/^\#/d' $(depfile)
|
||||
|
||||
# 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,obj,metadata --crate-type rlib \
|
||||
--out-dir $(objtree)/$(obj) -L$(objtree)/$(obj) \
|
||||
--crate-name $(patsubst %.o,%,$(notdir $@)) $<; \
|
||||
mv $(objtree)/$(obj)/$(patsubst %.o,%,$(notdir $@)).d $(depfile); \
|
||||
sed -i '/^\#/d' $(depfile) \
|
||||
$(if $(rustc_objcopy),;$(OBJCOPY) $(rustc_objcopy) $@)
|
||||
|
||||
rust-analyzer:
|
||||
$(Q)$(srctree)/scripts/generate_rust_analyzer.py $(srctree) $(objtree) \
|
||||
$(RUST_LIB_SRC) > $(objtree)/rust-project.json
|
||||
|
||||
$(obj)/core.o: private skip_clippy = 1
|
||||
$(obj)/core.o: private skip_flags = -Dunreachable_pub
|
||||
$(obj)/core.o: private rustc_target_flags = $(core-cfgs)
|
||||
$(obj)/core.o: $(RUST_LIB_SRC)/core/src/lib.rs $(obj)/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)/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)/kernel.o: private rustc_target_flags = --extern alloc \
|
||||
--extern macros --extern bindings
|
||||
$(obj)/kernel.o: $(src)/kernel/lib.rs $(obj)/alloc.o \
|
||||
$(obj)/libmacros.so $(obj)/bindings.o FORCE
|
||||
$(call if_changed_dep,rustc_library)
|
||||
|
||||
endif # CONFIG_RUST
|
||||
21
rust/bindgen_parameters
Normal file
21
rust/bindgen_parameters
Normal file
@ -0,0 +1,21 @@
|
||||
# SPDX-License-Identifier: GPL-2.0
|
||||
|
||||
--opaque-type xregs_state
|
||||
--opaque-type desc_struct
|
||||
--opaque-type arch_lbr_state
|
||||
--opaque-type local_apic
|
||||
|
||||
# Packed type cannot transitively contain a `#[repr(align)]` type.
|
||||
--opaque-type x86_msi_data
|
||||
--opaque-type x86_msi_addr_lo
|
||||
|
||||
# `try` is a reserved keyword since Rust 2018; solved in `bindgen` v0.59.2,
|
||||
# commit 2aed6b021680 ("context: Escape the try keyword properly").
|
||||
--opaque-type kunit_try_catch
|
||||
|
||||
# If SMP is disabled, `arch_spinlock_t` is defined as a ZST which triggers a Rust
|
||||
# warning. We don't need to peek into it anyway.
|
||||
--opaque-type spinlock
|
||||
|
||||
# `seccomp`'s comment gets understood as a doctest
|
||||
--no-doc-comments
|
||||
@ -36,12 +36,12 @@ ld-option = $(success,$(LD) -v $(1))
|
||||
as-instr = $(success,printf "%b\n" "$(1)" | $(CC) $(CLANG_FLAGS) -c -x assembler -o /dev/null -)
|
||||
|
||||
# check if $(CC) and $(LD) exist
|
||||
$(error-if,$(failure,command -v $(CC)),compiler '$(CC)' not found)
|
||||
$(error-if,$(failure,command -v $(CC)),C compiler '$(CC)' not found)
|
||||
$(error-if,$(failure,command -v $(LD)),linker '$(LD)' not found)
|
||||
|
||||
# Get the compiler name, version, and error out if it is not supported.
|
||||
# Get the C compiler name, version, and error out if it is not supported.
|
||||
cc-info := $(shell,$(srctree)/scripts/cc-version.sh $(CC))
|
||||
$(error-if,$(success,test -z "$(cc-info)"),Sorry$(comma) this compiler is not supported.)
|
||||
$(error-if,$(success,test -z "$(cc-info)"),Sorry$(comma) this C compiler is not supported.)
|
||||
cc-name := $(shell,set -- $(cc-info) && echo $1)
|
||||
cc-version := $(shell,set -- $(cc-info) && echo $2)
|
||||
|
||||
|
||||
@ -10,6 +10,9 @@ hostprogs-always-$(CONFIG_BUILDTIME_TABLE_SORT) += sorttable
|
||||
hostprogs-always-$(CONFIG_ASN1) += asn1_compiler
|
||||
hostprogs-always-$(CONFIG_MODULE_SIG_FORMAT) += sign-file
|
||||
hostprogs-always-$(CONFIG_SYSTEM_EXTRA_CERTIFICATE) += insert-sys-cert
|
||||
hostprogs-always-$(CONFIG_RUST) += generate_rust_target
|
||||
|
||||
generate_rust_target-rust := y
|
||||
|
||||
HOSTCFLAGS_sorttable.o = -I$(srctree)/tools/include
|
||||
HOSTLDLIBS_sorttable = -lpthread
|
||||
|
||||
@ -26,6 +26,7 @@ EXTRA_CPPFLAGS :=
|
||||
EXTRA_LDFLAGS :=
|
||||
asflags-y :=
|
||||
ccflags-y :=
|
||||
rustflags-y :=
|
||||
cppflags-y :=
|
||||
ldflags-y :=
|
||||
|
||||
@ -271,6 +272,65 @@ quiet_cmd_cc_lst_c = MKLST $@
|
||||
$(obj)/%.lst: $(src)/%.c FORCE
|
||||
$(call if_changed_dep,cc_lst_c)
|
||||
|
||||
# Compile Rust sources (.rs)
|
||||
# ---------------------------------------------------------------------------
|
||||
|
||||
rust_allowed_features := core_ffi_c
|
||||
|
||||
rust_common_cmd = \
|
||||
RUST_MODFILE=$(modfile) $(RUSTC_OR_CLIPPY) $(rust_flags) \
|
||||
-Zallow-features=$(rust_allowed_features) \
|
||||
-Zcrate-attr=no_std \
|
||||
-Zcrate-attr='feature($(rust_allowed_features))' \
|
||||
--extern alloc --extern kernel \
|
||||
--crate-type rlib --out-dir $(obj) -L $(objtree)/rust/ \
|
||||
--crate-name $(basename $(notdir $@))
|
||||
|
||||
rust_handle_depfile = \
|
||||
mv $(obj)/$(basename $(notdir $@)).d $(depfile); \
|
||||
sed -i '/^\#/d' $(depfile)
|
||||
|
||||
# `--emit=obj`, `--emit=asm` and `--emit=llvm-ir` imply a single codegen unit
|
||||
# will be used. We explicitly request `-Ccodegen-units=1` in any case, and
|
||||
# the compiler shows a warning if it is not 1. However, if we ever stop
|
||||
# requesting it explicitly and we start using some other `--emit` that does not
|
||||
# imply it (and for which codegen is performed), then we would be out of sync,
|
||||
# i.e. the outputs we would get for the different single targets (e.g. `.ll`)
|
||||
# would not match each other.
|
||||
|
||||
quiet_cmd_rustc_o_rs = $(RUSTC_OR_CLIPPY_QUIET) $(quiet_modtag) $@
|
||||
cmd_rustc_o_rs = \
|
||||
$(rust_common_cmd) --emit=dep-info,obj $<; \
|
||||
$(rust_handle_depfile)
|
||||
|
||||
$(obj)/%.o: $(src)/%.rs FORCE
|
||||
$(call if_changed_dep,rustc_o_rs)
|
||||
|
||||
quiet_cmd_rustc_rsi_rs = $(RUSTC_OR_CLIPPY_QUIET) $(quiet_modtag) $@
|
||||
cmd_rustc_rsi_rs = \
|
||||
$(rust_common_cmd) --emit=dep-info -Zunpretty=expanded $< >$@; \
|
||||
command -v $(RUSTFMT) >/dev/null && $(RUSTFMT) $@; \
|
||||
$(rust_handle_depfile)
|
||||
|
||||
$(obj)/%.rsi: $(src)/%.rs FORCE
|
||||
$(call if_changed_dep,rustc_rsi_rs)
|
||||
|
||||
quiet_cmd_rustc_s_rs = $(RUSTC_OR_CLIPPY_QUIET) $(quiet_modtag) $@
|
||||
cmd_rustc_s_rs = \
|
||||
$(rust_common_cmd) --emit=dep-info,asm $<; \
|
||||
$(rust_handle_depfile)
|
||||
|
||||
$(obj)/%.s: $(src)/%.rs FORCE
|
||||
$(call if_changed_dep,rustc_s_rs)
|
||||
|
||||
quiet_cmd_rustc_ll_rs = $(RUSTC_OR_CLIPPY_QUIET) $(quiet_modtag) $@
|
||||
cmd_rustc_ll_rs = \
|
||||
$(rust_common_cmd) --emit=dep-info,llvm-ir $<; \
|
||||
$(rust_handle_depfile)
|
||||
|
||||
$(obj)/%.ll: $(src)/%.rs FORCE
|
||||
$(call if_changed_dep,rustc_ll_rs)
|
||||
|
||||
# Compile assembler sources (.S)
|
||||
# ---------------------------------------------------------------------------
|
||||
|
||||
|
||||
@ -1,4 +1,6 @@
|
||||
DEBUG_CFLAGS :=
|
||||
DEBUG_RUSTFLAGS :=
|
||||
|
||||
debug-flags-y := -g
|
||||
|
||||
ifdef CONFIG_DEBUG_INFO_SPLIT
|
||||
@ -17,9 +19,12 @@ KBUILD_AFLAGS += $(debug-flags-y)
|
||||
|
||||
ifdef CONFIG_DEBUG_INFO_REDUCED
|
||||
DEBUG_CFLAGS += -fno-var-tracking
|
||||
DEBUG_RUSTFLAGS += -Cdebuginfo=1
|
||||
ifdef CONFIG_CC_IS_GCC
|
||||
DEBUG_CFLAGS += -femit-struct-debug-baseonly
|
||||
endif
|
||||
else
|
||||
DEBUG_RUSTFLAGS += -Cdebuginfo=2
|
||||
endif
|
||||
|
||||
ifdef CONFIG_DEBUG_INFO_COMPRESSED
|
||||
@ -30,3 +35,6 @@ endif
|
||||
|
||||
KBUILD_CFLAGS += $(DEBUG_CFLAGS)
|
||||
export DEBUG_CFLAGS
|
||||
|
||||
KBUILD_RUSTFLAGS += $(DEBUG_RUSTFLAGS)
|
||||
export DEBUG_RUSTFLAGS
|
||||
|
||||
@ -22,6 +22,8 @@ $(obj)/%.tab.c $(obj)/%.tab.h: $(src)/%.y FORCE
|
||||
# to preprocess a data file.
|
||||
#
|
||||
# Both C and C++ are supported, but preferred language is C for such utilities.
|
||||
# Rust is also supported, but it may only be used in scenarios where a Rust
|
||||
# toolchain is required to be available (e.g. when `CONFIG_RUST` is enabled).
|
||||
#
|
||||
# Sample syntax (see Documentation/kbuild/makefiles.rst for reference)
|
||||
# hostprogs := bin2hex
|
||||
@ -37,15 +39,20 @@ $(obj)/%.tab.c $(obj)/%.tab.h: $(src)/%.y FORCE
|
||||
# qconf-objs := menu.o
|
||||
# Will compile qconf as a C++ program, and menu as a C program.
|
||||
# They are linked as C++ code to the executable qconf
|
||||
#
|
||||
# hostprogs := target
|
||||
# target-rust := y
|
||||
# Will compile `target` as a Rust program, using `target.rs` as the crate root.
|
||||
# The crate may consist of several source files.
|
||||
|
||||
# C code
|
||||
# Executables compiled from a single .c file
|
||||
host-csingle := $(foreach m,$(hostprogs), \
|
||||
$(if $($(m)-objs)$($(m)-cxxobjs),,$(m)))
|
||||
$(if $($(m)-objs)$($(m)-cxxobjs)$($(m)-rust),,$(m)))
|
||||
|
||||
# C executables linked based on several .o files
|
||||
host-cmulti := $(foreach m,$(hostprogs),\
|
||||
$(if $($(m)-cxxobjs),,$(if $($(m)-objs),$(m))))
|
||||
$(if $($(m)-cxxobjs)$($(m)-rust),,$(if $($(m)-objs),$(m))))
|
||||
|
||||
# Object (.o) files compiled from .c files
|
||||
host-cobjs := $(sort $(foreach m,$(hostprogs),$($(m)-objs)))
|
||||
@ -58,11 +65,17 @@ host-cxxmulti := $(foreach m,$(hostprogs),$(if $($(m)-cxxobjs),$(m)))
|
||||
# C++ Object (.o) files compiled from .cc files
|
||||
host-cxxobjs := $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs)))
|
||||
|
||||
# Rust code
|
||||
# Executables compiled from a single Rust crate (which may consist of
|
||||
# one or more .rs files)
|
||||
host-rust := $(foreach m,$(hostprogs),$(if $($(m)-rust),$(m)))
|
||||
|
||||
host-csingle := $(addprefix $(obj)/,$(host-csingle))
|
||||
host-cmulti := $(addprefix $(obj)/,$(host-cmulti))
|
||||
host-cobjs := $(addprefix $(obj)/,$(host-cobjs))
|
||||
host-cxxmulti := $(addprefix $(obj)/,$(host-cxxmulti))
|
||||
host-cxxobjs := $(addprefix $(obj)/,$(host-cxxobjs))
|
||||
host-rust := $(addprefix $(obj)/,$(host-rust))
|
||||
|
||||
#####
|
||||
# Handle options to gcc. Support building with separate output directory
|
||||
@ -71,6 +84,8 @@ _hostc_flags = $(KBUILD_HOSTCFLAGS) $(HOST_EXTRACFLAGS) \
|
||||
$(HOSTCFLAGS_$(target-stem).o)
|
||||
_hostcxx_flags = $(KBUILD_HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \
|
||||
$(HOSTCXXFLAGS_$(target-stem).o)
|
||||
_hostrust_flags = $(KBUILD_HOSTRUSTFLAGS) $(HOST_EXTRARUSTFLAGS) \
|
||||
$(HOSTRUSTFLAGS_$(target-stem))
|
||||
|
||||
# $(objtree)/$(obj) for including generated headers from checkin source files
|
||||
ifeq ($(KBUILD_EXTMOD),)
|
||||
@ -82,6 +97,7 @@ endif
|
||||
|
||||
hostc_flags = -Wp,-MMD,$(depfile) $(_hostc_flags)
|
||||
hostcxx_flags = -Wp,-MMD,$(depfile) $(_hostcxx_flags)
|
||||
hostrust_flags = $(_hostrust_flags)
|
||||
|
||||
#####
|
||||
# Compile programs on the host
|
||||
@ -128,5 +144,17 @@ quiet_cmd_host-cxxobjs = HOSTCXX $@
|
||||
$(host-cxxobjs): $(obj)/%.o: $(src)/%.cc FORCE
|
||||
$(call if_changed_dep,host-cxxobjs)
|
||||
|
||||
# Create executable from a single Rust crate (which may consist of
|
||||
# one or more `.rs` files)
|
||||
# host-rust -> Executable
|
||||
quiet_cmd_host-rust = HOSTRUSTC $@
|
||||
cmd_host-rust = \
|
||||
$(HOSTRUSTC) $(hostrust_flags) --emit=dep-info,link \
|
||||
--out-dir=$(obj)/ $<; \
|
||||
mv $(obj)/$(target-stem).d $(depfile); \
|
||||
sed -i '/^\#/d' $(depfile)
|
||||
$(host-rust): $(obj)/%: $(src)/%.rs FORCE
|
||||
$(call if_changed_dep,host-rust)
|
||||
|
||||
targets += $(host-csingle) $(host-cmulti) $(host-cobjs) \
|
||||
$(host-cxxmulti) $(host-cxxobjs)
|
||||
$(host-cxxmulti) $(host-cxxobjs) $(host-rust)
|
||||
|
||||
@ -8,6 +8,7 @@ ldflags-y += $(EXTRA_LDFLAGS)
|
||||
# flags that take effect in current and sub directories
|
||||
KBUILD_AFLAGS += $(subdir-asflags-y)
|
||||
KBUILD_CFLAGS += $(subdir-ccflags-y)
|
||||
KBUILD_RUSTFLAGS += $(subdir-rustflags-y)
|
||||
|
||||
# Figure out what we need to build from the various variables
|
||||
# ===========================================================================
|
||||
@ -128,6 +129,10 @@ _c_flags = $(filter-out $(CFLAGS_REMOVE_$(target-stem).o), \
|
||||
$(filter-out $(ccflags-remove-y), \
|
||||
$(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(ccflags-y)) \
|
||||
$(CFLAGS_$(target-stem).o))
|
||||
_rust_flags = $(filter-out $(RUSTFLAGS_REMOVE_$(target-stem).o), \
|
||||
$(filter-out $(rustflags-remove-y), \
|
||||
$(KBUILD_RUSTFLAGS) $(rustflags-y)) \
|
||||
$(RUSTFLAGS_$(target-stem).o))
|
||||
_a_flags = $(filter-out $(AFLAGS_REMOVE_$(target-stem).o), \
|
||||
$(filter-out $(asflags-remove-y), \
|
||||
$(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(asflags-y)) \
|
||||
@ -202,6 +207,11 @@ modkern_cflags = \
|
||||
$(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \
|
||||
$(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL) $(modfile_flags))
|
||||
|
||||
modkern_rustflags = \
|
||||
$(if $(part-of-module), \
|
||||
$(KBUILD_RUSTFLAGS_MODULE) $(RUSTFLAGS_MODULE), \
|
||||
$(KBUILD_RUSTFLAGS_KERNEL) $(RUSTFLAGS_KERNEL))
|
||||
|
||||
modkern_aflags = $(if $(part-of-module), \
|
||||
$(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE), \
|
||||
$(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL))
|
||||
@ -211,6 +221,8 @@ c_flags = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
|
||||
$(_c_flags) $(modkern_cflags) \
|
||||
$(basename_flags) $(modname_flags)
|
||||
|
||||
rust_flags = $(_rust_flags) $(modkern_rustflags) @$(objtree)/include/generated/rustc_cfg
|
||||
|
||||
a_flags = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
|
||||
$(_a_flags) $(modkern_aflags)
|
||||
|
||||
|
||||
@ -39,11 +39,13 @@ quiet_cmd_ld_ko_o = LD [M] $@
|
||||
|
||||
quiet_cmd_btf_ko = BTF [M] $@
|
||||
cmd_btf_ko = \
|
||||
if [ -f vmlinux ]; then \
|
||||
if [ ! -f vmlinux ]; then \
|
||||
printf "Skipping BTF generation for %s due to unavailability of vmlinux\n" $@ 1>&2; \
|
||||
elif [ -n "$(CONFIG_RUST)" ] && $(srctree)/scripts/is_rust_module.sh $@; then \
|
||||
printf "Skipping BTF generation for %s because it's a Rust module\n" $@ 1>&2; \
|
||||
else \
|
||||
LLVM_OBJCOPY="$(OBJCOPY)" $(PAHOLE) -J $(PAHOLE_FLAGS) --btf_base vmlinux $@; \
|
||||
$(RESOLVE_BTFIDS) -b vmlinux $@; \
|
||||
else \
|
||||
printf "Skipping BTF generation for %s due to unavailability of vmlinux\n" $@ 1>&2; \
|
||||
fi;
|
||||
|
||||
# Same as newer-prereqs, but allows to exclude specified extra dependencies
|
||||
|
||||
@ -1,13 +1,13 @@
|
||||
#!/bin/sh
|
||||
# SPDX-License-Identifier: GPL-2.0
|
||||
#
|
||||
# Print the compiler name and its version in a 5 or 6-digit form.
|
||||
# Print the C compiler name and its version in a 5 or 6-digit form.
|
||||
# Also, perform the minimum version check.
|
||||
|
||||
set -e
|
||||
|
||||
# Print the compiler name and some version components.
|
||||
get_compiler_info()
|
||||
# Print the C compiler name and some version components.
|
||||
get_c_compiler_info()
|
||||
{
|
||||
cat <<- EOF | "$@" -E -P -x c - 2>/dev/null
|
||||
#if defined(__clang__)
|
||||
@ -32,7 +32,7 @@ get_canonical_version()
|
||||
|
||||
# $@ instead of $1 because multiple words might be given, e.g. CC="ccache gcc".
|
||||
orig_args="$@"
|
||||
set -- $(get_compiler_info "$@")
|
||||
set -- $(get_c_compiler_info "$@")
|
||||
|
||||
name=$1
|
||||
|
||||
@ -52,7 +52,7 @@ ICC)
|
||||
min_version=$($min_tool_version icc)
|
||||
;;
|
||||
*)
|
||||
echo "$orig_args: unknown compiler" >&2
|
||||
echo "$orig_args: unknown C compiler" >&2
|
||||
exit 1
|
||||
;;
|
||||
esac
|
||||
@ -62,7 +62,7 @@ min_cversion=$(get_canonical_version $min_version)
|
||||
|
||||
if [ "$cversion" -lt "$min_cversion" ]; then
|
||||
echo >&2 "***"
|
||||
echo >&2 "*** Compiler is too old."
|
||||
echo >&2 "*** C compiler is too old."
|
||||
echo >&2 "*** Your $name version: $version"
|
||||
echo >&2 "*** Minimum $name version: $min_version"
|
||||
echo >&2 "***"
|
||||
|
||||
@ -216,6 +216,13 @@ static const char *conf_get_autoheader_name(void)
|
||||
return name ? name : "include/generated/autoconf.h";
|
||||
}
|
||||
|
||||
static const char *conf_get_rustccfg_name(void)
|
||||
{
|
||||
char *name = getenv("KCONFIG_RUSTCCFG");
|
||||
|
||||
return name ? name : "include/generated/rustc_cfg";
|
||||
}
|
||||
|
||||
static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
|
||||
{
|
||||
char *p2;
|
||||
@ -605,6 +612,9 @@ static const struct comment_style comment_style_c = {
|
||||
|
||||
static void conf_write_heading(FILE *fp, const struct comment_style *cs)
|
||||
{
|
||||
if (!cs)
|
||||
return;
|
||||
|
||||
fprintf(fp, "%s\n", cs->prefix);
|
||||
|
||||
fprintf(fp, "%s Automatically generated file; DO NOT EDIT.\n",
|
||||
@ -745,6 +755,65 @@ static void print_symbol_for_c(FILE *fp, struct symbol *sym)
|
||||
free(escaped);
|
||||
}
|
||||
|
||||
static void print_symbol_for_rustccfg(FILE *fp, struct symbol *sym)
|
||||
{
|
||||
const char *val;
|
||||
const char *val_prefix = "";
|
||||
char *val_prefixed = NULL;
|
||||
size_t val_prefixed_len;
|
||||
char *escaped = NULL;
|
||||
|
||||
if (sym->type == S_UNKNOWN)
|
||||
return;
|
||||
|
||||
val = sym_get_string_value(sym);
|
||||
|
||||
switch (sym->type) {
|
||||
case S_BOOLEAN:
|
||||
case S_TRISTATE:
|
||||
/*
|
||||
* We do not care about disabled ones, i.e. no need for
|
||||
* what otherwise are "comments" in other printers.
|
||||
*/
|
||||
if (*val == 'n')
|
||||
return;
|
||||
|
||||
/*
|
||||
* To have similar functionality to the C macro `IS_ENABLED()`
|
||||
* we provide an empty `--cfg CONFIG_X` here in both `y`
|
||||
* and `m` cases.
|
||||
*
|
||||
* Then, the common `fprintf()` below will also give us
|
||||
* a `--cfg CONFIG_X="y"` or `--cfg CONFIG_X="m"`, which can
|
||||
* be used as the equivalent of `IS_BUILTIN()`/`IS_MODULE()`.
|
||||
*/
|
||||
fprintf(fp, "--cfg=%s%s\n", CONFIG_, sym->name);
|
||||
break;
|
||||
case S_HEX:
|
||||
if (val[0] != '0' || (val[1] != 'x' && val[1] != 'X'))
|
||||
val_prefix = "0x";
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
if (strlen(val_prefix) > 0) {
|
||||
val_prefixed_len = strlen(val) + strlen(val_prefix) + 1;
|
||||
val_prefixed = xmalloc(val_prefixed_len);
|
||||
snprintf(val_prefixed, val_prefixed_len, "%s%s", val_prefix, val);
|
||||
val = val_prefixed;
|
||||
}
|
||||
|
||||
/* All values get escaped: the `--cfg` option only takes strings */
|
||||
escaped = escape_string_value(val);
|
||||
val = escaped;
|
||||
|
||||
fprintf(fp, "--cfg=%s%s=%s\n", CONFIG_, sym->name, val);
|
||||
|
||||
free(escaped);
|
||||
free(val_prefixed);
|
||||
}
|
||||
|
||||
/*
|
||||
* Write out a minimal config.
|
||||
* All values that has default values are skipped as this is redundant.
|
||||
@ -1132,6 +1201,12 @@ int conf_write_autoconf(int overwrite)
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
ret = __conf_write_autoconf(conf_get_rustccfg_name(),
|
||||
print_symbol_for_rustccfg,
|
||||
NULL);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
/*
|
||||
* Create include/config/auto.conf. This must be the last step because
|
||||
* Kbuild has a dependency on auto.conf and this marks the successful
|
||||
|
||||
Loading…
Reference in New Issue
Block a user