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381 lines
16 KiB
381 lines
16 KiB
# SPDX-License-Identifier: GPL-2.0 |
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always-$(CONFIG_RUST) += target.json |
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no-clean-files += target.json |
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obj-$(CONFIG_RUST) += core.o compiler_builtins.o |
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always-$(CONFIG_RUST) += exports_core_generated.h |
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# Missing prototypes are expected in the helpers since these are exported |
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# for Rust only, thus there is no header nor prototypes. |
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obj-$(CONFIG_RUST) += helpers.o |
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CFLAGS_REMOVE_helpers.o = -Wmissing-prototypes -Wmissing-declarations |
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always-$(CONFIG_RUST) += libmacros.so |
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no-clean-files += libmacros.so |
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always-$(CONFIG_RUST) += bindings/bindings_generated.rs bindings/bindings_helpers_generated.rs |
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obj-$(CONFIG_RUST) += alloc.o bindings.o kernel.o |
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always-$(CONFIG_RUST) += exports_alloc_generated.h exports_bindings_generated.h \ |
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exports_kernel_generated.h |
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obj-$(CONFIG_RUST) += exports.o |
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# Avoids running `$(RUSTC)` for the sysroot when it may not be available. |
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ifdef CONFIG_RUST |
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# `$(rust_flags)` is passed in case the user added `--sysroot`. |
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rustc_sysroot := $(shell $(RUSTC) $(rust_flags) --print sysroot) |
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rustc_host_target := $(shell $(RUSTC) --version --verbose | grep -F 'host: ' | cut -d' ' -f2) |
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RUST_LIB_SRC ?= $(rustc_sysroot)/lib/rustlib/src/rust/library |
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ifeq ($(quiet),silent_) |
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cargo_quiet=-q |
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rust_test_quiet=-q |
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rustdoc_test_quiet=--test-args -q |
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else ifeq ($(quiet),quiet_) |
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rust_test_quiet=-q |
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rustdoc_test_quiet=--test-args -q |
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else |
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cargo_quiet=--verbose |
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endif |
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core-cfgs = \ |
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--cfg no_fp_fmt_parse |
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alloc-cfgs = \ |
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--cfg no_fmt \ |
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--cfg no_global_oom_handling \ |
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--cfg no_macros \ |
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--cfg no_rc \ |
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--cfg no_str \ |
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--cfg no_string \ |
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--cfg no_sync \ |
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--cfg no_thin |
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quiet_cmd_rustdoc = RUSTDOC $(if $(rustdoc_host),H, ) $< |
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cmd_rustdoc = \ |
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OBJTREE=$(abspath $(objtree)) \ |
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$(RUSTDOC) $(if $(rustdoc_host),$(rust_common_flags),$(rust_flags)) \ |
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$(rustc_target_flags) -L$(objtree)/$(obj) \ |
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--output $(objtree)/$(obj)/doc \ |
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--crate-name $(subst rustdoc-,,$@) \ |
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@$(objtree)/include/generated/rustc_cfg $< |
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# The `html_logo_url` and `html_favicon_url` forms of the `doc` attribute |
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# can be used to specify a custom logo. However: |
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# - The given value is used as-is, thus it cannot be relative or a local file |
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# (unlike the non-custom case) since the generated docs have subfolders. |
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# - It requires adding it to every crate. |
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# - It requires changing `core` which comes from the sysroot. |
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# |
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# Using `-Zcrate-attr` would solve the last two points, but not the first. |
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# The https://github.com/rust-lang/rfcs/pull/3226 RFC suggests two new |
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# command-like flags to solve the issue. Meanwhile, we use the non-custom case |
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# and then retouch the generated files. |
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rustdoc: rustdoc-core rustdoc-macros rustdoc-compiler_builtins \ |
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rustdoc-alloc rustdoc-kernel |
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$(Q)cp $(srctree)/Documentation/images/logo.svg $(objtree)/$(obj)/doc |
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$(Q)cp $(srctree)/Documentation/images/COPYING-logo $(objtree)/$(obj)/doc |
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$(Q)find $(objtree)/$(obj)/doc -name '*.html' -type f -print0 | xargs -0 sed -Ei \ |
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-e 's:rust-logo\.svg:logo.svg:g' \ |
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-e 's:rust-logo\.png:logo.svg:g' \ |
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-e 's:favicon\.svg:logo.svg:g' \ |
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-e 's:<link rel="alternate icon" type="image/png" href="[./]*favicon-(16x16|32x32)\.png">::g' |
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$(Q)echo '.logo-container > img { object-fit: contain; }' \ |
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>> $(objtree)/$(obj)/doc/rustdoc.css |
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rustdoc-macros: private rustdoc_host = yes |
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rustdoc-macros: private rustc_target_flags = --crate-type proc-macro \ |
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--extern proc_macro |
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rustdoc-macros: $(src)/macros/lib.rs FORCE |
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$(call if_changed,rustdoc) |
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rustdoc-core: private rustc_target_flags = $(core-cfgs) |
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rustdoc-core: $(RUST_LIB_SRC)/core/src/lib.rs FORCE |
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$(call if_changed,rustdoc) |
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rustdoc-compiler_builtins: $(src)/compiler_builtins.rs rustdoc-core FORCE |
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$(call if_changed,rustdoc) |
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# We need to allow `rustdoc::broken_intra_doc_links` because some |
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# `no_global_oom_handling` functions refer to non-`no_global_oom_handling` |
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# functions. Ideally `rustdoc` would have a way to distinguish broken links |
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# due to things that are "configured out" vs. entirely non-existing ones. |
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rustdoc-alloc: private rustc_target_flags = $(alloc-cfgs) \ |
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-Arustdoc::broken_intra_doc_links |
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rustdoc-alloc: $(src)/alloc/lib.rs rustdoc-core rustdoc-compiler_builtins FORCE |
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$(call if_changed,rustdoc) |
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rustdoc-kernel: private rustc_target_flags = --extern alloc \ |
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--extern macros=$(objtree)/$(obj)/libmacros.so \ |
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--extern bindings |
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rustdoc-kernel: $(src)/kernel/lib.rs rustdoc-core rustdoc-macros \ |
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rustdoc-compiler_builtins rustdoc-alloc $(obj)/libmacros.so \ |
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$(obj)/bindings.o FORCE |
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$(call if_changed,rustdoc) |
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quiet_cmd_rustc_test_library = RUSTC TL $< |
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cmd_rustc_test_library = \ |
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OBJTREE=$(abspath $(objtree)) \ |
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$(RUSTC) $(rust_common_flags) \ |
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@$(objtree)/include/generated/rustc_cfg $(rustc_target_flags) \ |
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--crate-type $(if $(rustc_test_library_proc),proc-macro,rlib) \ |
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--out-dir $(objtree)/$(obj)/test --cfg testlib \ |
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--sysroot $(objtree)/$(obj)/test/sysroot \ |
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-L$(objtree)/$(obj)/test \ |
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--crate-name $(subst rusttest-,,$(subst rusttestlib-,,$@)) $< |
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rusttestlib-macros: private rustc_target_flags = --extern proc_macro |
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rusttestlib-macros: private rustc_test_library_proc = yes |
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rusttestlib-macros: $(src)/macros/lib.rs rusttest-prepare FORCE |
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$(call if_changed,rustc_test_library) |
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rusttestlib-bindings: $(src)/bindings/lib.rs rusttest-prepare FORCE |
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$(call if_changed,rustc_test_library) |
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quiet_cmd_rustdoc_test = RUSTDOC T $< |
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cmd_rustdoc_test = \ |
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OBJTREE=$(abspath $(objtree)) \ |
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$(RUSTDOC) --test $(rust_common_flags) \ |
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@$(objtree)/include/generated/rustc_cfg \ |
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$(rustc_target_flags) $(rustdoc_test_target_flags) \ |
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--sysroot $(objtree)/$(obj)/test/sysroot $(rustdoc_test_quiet) \ |
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-L$(objtree)/$(obj)/test --output $(objtree)/$(obj)/doc \ |
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--crate-name $(subst rusttest-,,$@) $< |
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# We cannot use `-Zpanic-abort-tests` because some tests are dynamic, |
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# so for the moment we skip `-Cpanic=abort`. |
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quiet_cmd_rustc_test = RUSTC T $< |
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cmd_rustc_test = \ |
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OBJTREE=$(abspath $(objtree)) \ |
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$(RUSTC) --test $(rust_common_flags) \ |
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@$(objtree)/include/generated/rustc_cfg \ |
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$(rustc_target_flags) --out-dir $(objtree)/$(obj)/test \ |
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--sysroot $(objtree)/$(obj)/test/sysroot \ |
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-L$(objtree)/$(obj)/test \ |
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--crate-name $(subst rusttest-,,$@) $<; \ |
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$(objtree)/$(obj)/test/$(subst rusttest-,,$@) $(rust_test_quiet) \ |
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$(rustc_test_run_flags) |
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rusttest: rusttest-macros rusttest-kernel |
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# This prepares a custom sysroot with our custom `alloc` instead of |
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# the standard one. |
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# |
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# This requires several hacks: |
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# - Unlike `core` and `alloc`, `std` depends on more than a dozen crates, |
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# including third-party crates that need to be downloaded, plus custom |
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# `build.rs` steps. Thus hardcoding things here is not maintainable. |
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# - `cargo` knows how to build the standard library, but it is an unstable |
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# feature so far (`-Zbuild-std`). |
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# - `cargo` only considers the use case of building the standard library |
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# to use it in a given package. Thus we need to create a dummy package |
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# and pick the generated libraries from there. |
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# - Since we only keep a subset of upstream `alloc` in-tree, we need |
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# to recreate it on the fly by putting our sources on top. |
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# - The usual ways of modifying the dependency graph in `cargo` do not seem |
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# to apply for the `-Zbuild-std` steps, thus we have to mislead it |
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# by modifying the sources in the sysroot. |
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# - To avoid messing with the user's Rust installation, we create a clone |
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# of the sysroot. However, `cargo` ignores `RUSTFLAGS` in the `-Zbuild-std` |
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# steps, thus we use a wrapper binary passed via `RUSTC` to pass the flag. |
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# |
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# In the future, we hope to avoid the whole ordeal by either: |
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# - Making the `test` crate not depend on `std` (either improving upstream |
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# or having our own custom crate). |
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# - Making the tests run in kernel space (requires the previous point). |
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# - Making `std` and friends be more like a "normal" crate, so that |
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# `-Zbuild-std` and related hacks are not needed. |
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quiet_cmd_rustsysroot = RUSTSYSROOT |
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cmd_rustsysroot = \ |
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rm -rf $(objtree)/$(obj)/test; \ |
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mkdir -p $(objtree)/$(obj)/test; \ |
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cp -a $(rustc_sysroot) $(objtree)/$(obj)/test/sysroot; \ |
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cp -r $(srctree)/$(src)/alloc/* \ |
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$(objtree)/$(obj)/test/sysroot/lib/rustlib/src/rust/library/alloc/src; \ |
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echo '\#!/bin/sh' > $(objtree)/$(obj)/test/rustc_sysroot; \ |
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echo "$(RUSTC) --sysroot=$(abspath $(objtree)/$(obj)/test/sysroot) \"\$$@\"" \ |
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>> $(objtree)/$(obj)/test/rustc_sysroot; \ |
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chmod u+x $(objtree)/$(obj)/test/rustc_sysroot; \ |
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$(CARGO) -q new $(objtree)/$(obj)/test/dummy; \ |
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RUSTC=$(objtree)/$(obj)/test/rustc_sysroot $(CARGO) $(cargo_quiet) \ |
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test -Zbuild-std --target $(rustc_host_target) \ |
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--manifest-path $(objtree)/$(obj)/test/dummy/Cargo.toml; \ |
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rm $(objtree)/$(obj)/test/sysroot/lib/rustlib/$(rustc_host_target)/lib/*; \ |
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cp $(objtree)/$(obj)/test/dummy/target/$(rustc_host_target)/debug/deps/* \ |
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$(objtree)/$(obj)/test/sysroot/lib/rustlib/$(rustc_host_target)/lib |
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rusttest-prepare: FORCE |
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$(call if_changed,rustsysroot) |
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rusttest-macros: private rustc_target_flags = --extern proc_macro |
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rusttest-macros: private rustdoc_test_target_flags = --crate-type proc-macro |
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rusttest-macros: $(src)/macros/lib.rs rusttest-prepare FORCE |
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$(call if_changed,rustc_test) |
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$(call if_changed,rustdoc_test) |
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rusttest-kernel: private rustc_target_flags = --extern alloc \ |
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--extern macros --extern bindings |
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rusttest-kernel: $(src)/kernel/lib.rs rusttest-prepare \ |
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rusttestlib-macros rusttestlib-bindings FORCE |
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$(call if_changed,rustc_test) |
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$(call if_changed,rustc_test_library) |
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filechk_rust_target = $(objtree)/scripts/generate_rust_target < $< |
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$(obj)/target.json: $(objtree)/include/config/auto.conf FORCE |
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$(call filechk,rust_target) |
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ifdef CONFIG_CC_IS_CLANG |
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bindgen_c_flags = $(c_flags) |
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else |
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# bindgen relies on libclang to parse C. Ideally, bindgen would support a GCC |
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# plugin backend and/or the Clang driver would be perfectly compatible with GCC. |
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# |
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# For the moment, here we are tweaking the flags on the fly. This is a hack, |
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# and some kernel configurations may not work (e.g. `GCC_PLUGIN_RANDSTRUCT` |
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# if we end up using one of those structs). |
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bindgen_skip_c_flags := -mno-fp-ret-in-387 -mpreferred-stack-boundary=% \ |
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-mskip-rax-setup -mgeneral-regs-only -msign-return-address=% \ |
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-mindirect-branch=thunk-extern -mindirect-branch-register \ |
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-mfunction-return=thunk-extern -mrecord-mcount -mabi=lp64 \ |
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-mindirect-branch-cs-prefix -mstack-protector-guard% -mtraceback=no \ |
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-mno-pointers-to-nested-functions -mno-string \ |
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-mno-strict-align -mstrict-align \ |
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-fconserve-stack -falign-jumps=% -falign-loops=% \ |
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-femit-struct-debug-baseonly -fno-ipa-cp-clone -fno-ipa-sra \ |
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-fno-partial-inlining -fplugin-arg-arm_ssp_per_task_plugin-% \ |
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-fno-reorder-blocks -fno-allow-store-data-races -fasan-shadow-offset=% \ |
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-fzero-call-used-regs=% -fno-stack-clash-protection \ |
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-fno-inline-functions-called-once \ |
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--param=% --param asan-% |
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# Derived from `scripts/Makefile.clang`. |
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BINDGEN_TARGET_x86 := x86_64-linux-gnu |
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BINDGEN_TARGET := $(BINDGEN_TARGET_$(SRCARCH)) |
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# All warnings are inhibited since GCC builds are very experimental, |
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# many GCC warnings are not supported by Clang, they may only appear in |
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# some configurations, with new GCC versions, etc. |
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bindgen_extra_c_flags = -w --target=$(BINDGEN_TARGET) |
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bindgen_c_flags = $(filter-out $(bindgen_skip_c_flags), $(c_flags)) \ |
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$(bindgen_extra_c_flags) |
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endif |
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ifdef CONFIG_LTO |
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bindgen_c_flags_lto = $(filter-out $(CC_FLAGS_LTO), $(bindgen_c_flags)) |
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else |
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bindgen_c_flags_lto = $(bindgen_c_flags) |
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endif |
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bindgen_c_flags_final = $(bindgen_c_flags_lto) -D__BINDGEN__ |
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quiet_cmd_bindgen = BINDGEN $@ |
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cmd_bindgen = \ |
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$(BINDGEN) $< $(bindgen_target_flags) \ |
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--use-core --with-derive-default --ctypes-prefix core::ffi --no-layout-tests \ |
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--no-debug '.*' \ |
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--size_t-is-usize -o $@ -- $(bindgen_c_flags_final) -DMODULE \ |
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$(bindgen_target_cflags) $(bindgen_target_extra) |
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$(obj)/bindings/bindings_generated.rs: private bindgen_target_flags = \ |
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$(shell grep -v '^\#\|^$$' $(srctree)/$(src)/bindgen_parameters) |
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$(obj)/bindings/bindings_generated.rs: $(src)/bindings/bindings_helper.h \ |
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$(src)/bindgen_parameters FORCE |
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$(call if_changed_dep,bindgen) |
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# See `CFLAGS_REMOVE_helpers.o` above. In addition, Clang on C does not warn |
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# with `-Wmissing-declarations` (unlike GCC), so it is not strictly needed here |
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# given it is `libclang`; but for consistency, future Clang changes and/or |
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# a potential future GCC backend for `bindgen`, we disable it too. |
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$(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_flags = \ |
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--blacklist-type '.*' --whitelist-var '' \ |
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--whitelist-function 'rust_helper_.*' |
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$(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_cflags = \ |
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-I$(objtree)/$(obj) -Wno-missing-prototypes -Wno-missing-declarations |
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$(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_extra = ; \ |
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sed -Ei 's/pub fn rust_helper_([a-zA-Z0-9_]*)/#[link_name="rust_helper_\1"]\n pub fn \1/g' $@ |
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$(obj)/bindings/bindings_helpers_generated.rs: $(src)/helpers.c FORCE |
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$(call if_changed_dep,bindgen) |
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quiet_cmd_exports = EXPORTS $@ |
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cmd_exports = \ |
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$(NM) -p --defined-only $< \ |
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| grep -E ' (T|R|D) ' | cut -d ' ' -f 3 \ |
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| xargs -Isymbol \ |
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echo 'EXPORT_SYMBOL_RUST_GPL(symbol);' > $@ |
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$(obj)/exports_core_generated.h: $(obj)/core.o FORCE |
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$(call if_changed,exports) |
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$(obj)/exports_alloc_generated.h: $(obj)/alloc.o FORCE |
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$(call if_changed,exports) |
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$(obj)/exports_bindings_generated.h: $(obj)/bindings.o FORCE |
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$(call if_changed,exports) |
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$(obj)/exports_kernel_generated.h: $(obj)/kernel.o FORCE |
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$(call if_changed,exports) |
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quiet_cmd_rustc_procmacro = $(RUSTC_OR_CLIPPY_QUIET) P $@ |
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cmd_rustc_procmacro = \ |
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$(RUSTC_OR_CLIPPY) $(rust_common_flags) \ |
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--emit=dep-info,link --extern proc_macro \ |
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--crate-type proc-macro --out-dir $(objtree)/$(obj) \ |
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--crate-name $(patsubst lib%.so,%,$(notdir $@)) $<; \ |
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mv $(objtree)/$(obj)/$(patsubst lib%.so,%,$(notdir $@)).d $(depfile); \ |
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sed -i '/^\#/d' $(depfile) |
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# Procedural macros can only be used with the `rustc` that compiled it. |
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# Therefore, to get `libmacros.so` automatically recompiled when the compiler |
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# version changes, we add `core.o` as a dependency (even if it is not needed). |
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$(obj)/libmacros.so: $(src)/macros/lib.rs $(obj)/core.o FORCE |
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$(call if_changed_dep,rustc_procmacro) |
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quiet_cmd_rustc_library = $(if $(skip_clippy),RUSTC,$(RUSTC_OR_CLIPPY_QUIET)) L $@ |
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cmd_rustc_library = \ |
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OBJTREE=$(abspath $(objtree)) \ |
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$(if $(skip_clippy),$(RUSTC),$(RUSTC_OR_CLIPPY)) \ |
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$(filter-out $(skip_flags),$(rust_flags) $(rustc_target_flags)) \ |
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--emit=dep-info,obj,metadata --crate-type rlib \ |
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--out-dir $(objtree)/$(obj) -L$(objtree)/$(obj) \ |
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--crate-name $(patsubst %.o,%,$(notdir $@)) $<; \ |
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mv $(objtree)/$(obj)/$(patsubst %.o,%,$(notdir $@)).d $(depfile); \ |
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sed -i '/^\#/d' $(depfile) \ |
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$(if $(rustc_objcopy),;$(OBJCOPY) $(rustc_objcopy) $@) |
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rust-analyzer: |
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$(Q)$(srctree)/scripts/generate_rust_analyzer.py $(srctree) $(objtree) \ |
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$(RUST_LIB_SRC) > $(objtree)/rust-project.json |
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$(obj)/core.o: private skip_clippy = 1 |
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$(obj)/core.o: private skip_flags = -Dunreachable_pub |
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$(obj)/core.o: private rustc_target_flags = $(core-cfgs) |
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$(obj)/core.o: $(RUST_LIB_SRC)/core/src/lib.rs $(obj)/target.json FORCE |
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$(call if_changed_dep,rustc_library) |
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$(obj)/compiler_builtins.o: private rustc_objcopy = -w -W '__*' |
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$(obj)/compiler_builtins.o: $(src)/compiler_builtins.rs $(obj)/core.o FORCE |
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$(call if_changed_dep,rustc_library) |
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$(obj)/alloc.o: private skip_clippy = 1 |
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$(obj)/alloc.o: private skip_flags = -Dunreachable_pub |
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$(obj)/alloc.o: private rustc_target_flags = $(alloc-cfgs) |
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$(obj)/alloc.o: $(src)/alloc/lib.rs $(obj)/compiler_builtins.o FORCE |
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$(call if_changed_dep,rustc_library) |
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$(obj)/bindings.o: $(src)/bindings/lib.rs \ |
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$(obj)/compiler_builtins.o \ |
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$(obj)/bindings/bindings_generated.rs \ |
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$(obj)/bindings/bindings_helpers_generated.rs FORCE |
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$(call if_changed_dep,rustc_library) |
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$(obj)/kernel.o: private rustc_target_flags = --extern alloc \ |
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--extern macros --extern bindings |
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$(obj)/kernel.o: $(src)/kernel/lib.rs $(obj)/alloc.o \ |
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$(obj)/libmacros.so $(obj)/bindings.o FORCE |
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$(call if_changed_dep,rustc_library) |
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endif # CONFIG_RUST
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