| # SPDX-License-Identifier: GPL-2.0 |
| |
| obj-$(CONFIG_RUST) += core.o compiler_builtins.o helpers.o |
| extra-$(CONFIG_RUST) += exports_core_generated.h |
| |
| extra-$(CONFIG_RUST) += libmodule.so |
| |
| extra-$(CONFIG_RUST) += bindings_generated.rs |
| obj-$(CONFIG_RUST) += alloc.o kernel.o |
| extra-$(CONFIG_RUST) += exports_alloc_generated.h exports_kernel_generated.h |
| |
| obj-$(CONFIG_RUST) += exports.o |
| |
| RUSTDOC = rustdoc |
| |
| quiet_cmd_rustdoc = RUSTDOC $< |
| cmd_rustdoc = \ |
| RUST_BINDINGS_FILE=$(abspath $(objtree)/rust/bindings_generated.rs) \ |
| $(RUSTDOC) $(filter-out --emit=%, $(rustc_flags)) \ |
| $(rustdoc_target_flags) -L $(objtree)/rust/ \ |
| --output $(objtree)/rust/doc --crate-name $(subst rustdoc-,,$@) \ |
| -Fmissing-docs @$(objtree)/include/generated/rustc_cfg $< |
| |
| rustdoc: rustdoc-module rustdoc-compiler_builtins rustdoc-kernel |
| |
| rustdoc-module: private rustdoc_target_flags = --crate-type proc-macro \ |
| --extern proc_macro |
| rustdoc-module: $(srctree)/rust/module.rs FORCE |
| $(call if_changed,rustdoc) |
| |
| rustdoc-compiler_builtins: $(srctree)/rust/compiler_builtins.rs FORCE |
| $(call if_changed,rustdoc) |
| |
| rustdoc-kernel: private rustdoc_target_flags = --extern alloc \ |
| --extern module=$(objtree)/rust/libmodule.so |
| rustdoc-kernel: $(srctree)/rust/kernel/lib.rs rustdoc-module \ |
| $(objtree)/rust/libmodule.so $(objtree)/rust/bindings_generated.rs FORCE |
| $(call if_changed,rustdoc) |
| |
| 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. Some config |
| # options may not work (e.g. `GCC_PLUGIN_RANDSTRUCT` if we end up using one |
| # of those structs). We might want to redo how Clang flags are kept track of |
| # in the general `Makefile` even for GCC builds, similar to what we did with |
| # `TENTATIVE_CLANG_FLAGS`. |
| 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 -mrecord-mcount \ |
| -mabi=lp64 -mstack-protector-guard% -fconserve-stack -falign-jumps=% \ |
| -falign-loops=% -fno-ipa-cp-clone -fno-partial-inlining \ |
| -fno-reorder-blocks -fno-allow-store-data-races -fasan-shadow-offset=% \ |
| -Wno-packed-not-aligned -Wno-format-truncation -Wno-format-overflow \ |
| -Wno-stringop-truncation -Wno-unused-but-set-variable \ |
| -Wno-stringop-overflow -Wno-restrict -Wno-maybe-uninitialized \ |
| -Werror=designated-init -Wno-zero-length-bounds \ |
| --param=% --param asan-% |
| |
| # PowerPC |
| bindgen_skip_c_flags += -mtraceback=no -mno-pointers-to-nested-functions \ |
| -mno-string -mno-strict-align |
| |
| bindgen_extra_c_flags = $(TENTATIVE_CLANG_FLAGS) -Wno-address-of-packed-member |
| bindgen_c_flags = $(filter-out $(bindgen_skip_c_flags), $(c_flags)) \ |
| $(bindgen_extra_c_flags) |
| endif |
| |
| bindgen_opaque_types := xregs_state desc_struct arch_lbr_state |
| |
| # To avoid several recompilations in PowerPC, which inserts `-D_TASK_CPU` |
| bindgen_c_flags_final = $(filter-out -D_TASK_CPU=%, $(bindgen_c_flags)) |
| |
| quiet_cmd_bindgen = BINDGEN $@ |
| cmd_bindgen = \ |
| $(BINDGEN) $< $(addprefix --opaque-type , $(bindgen_opaque_types)) \ |
| --use-core --with-derive-default --ctypes-prefix c_types \ |
| --size_t-is-usize -o $@ -- $(bindgen_c_flags_final) -DMODULE |
| |
| $(objtree)/rust/bindings_generated.rs: $(srctree)/rust/kernel/bindings_helper.h 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 | grep -E '^(__rust_|_R)' \ |
| | xargs -Isymbol \ |
| echo 'EXPORT_SYMBOL_RUST_GPL(symbol);' > $@ |
| |
| $(objtree)/rust/exports_core_generated.h: $(objtree)/rust/core.o FORCE |
| $(call if_changed,exports) |
| |
| $(objtree)/rust/exports_alloc_generated.h: $(objtree)/rust/alloc.o FORCE |
| $(call if_changed,exports) |
| |
| $(objtree)/rust/exports_kernel_generated.h: $(objtree)/rust/kernel.o FORCE |
| $(call if_changed,exports) |
| |
| # `-Cpanic=unwind -Cforce-unwind-tables=y` overrides `rustc_flags` in order to |
| # avoid the https://github.com/rust-lang/rust/issues/82320 rustc crash. |
| quiet_cmd_rustc_procmacro = $(RUSTC_OR_CLIPPY_QUIET) P $@ |
| cmd_rustc_procmacro = \ |
| $(RUSTC_OR_CLIPPY) $(rustc_flags) \ |
| --emit=dep-info,link --extern proc_macro \ |
| -Cpanic=unwind -Cforce-unwind-tables=y \ |
| --crate-type proc-macro --out-dir $(objtree)/rust/ \ |
| --crate-name $(patsubst lib%.so,%,$(notdir $@)) $<; \ |
| mv $(objtree)/rust/$(patsubst lib%.so,%,$(notdir $@)).d $(depfile); \ |
| sed -i '/^\#/d' $(depfile) |
| |
| $(objtree)/rust/libmodule.so: $(srctree)/rust/module.rs FORCE |
| $(call if_changed_dep,rustc_procmacro) |
| |
| quiet_cmd_rustc_library = $(if $(skip_clippy),RUSTC,$(RUSTC_OR_CLIPPY_QUIET)) L $@ |
| cmd_rustc_library = \ |
| RUST_BINDINGS_FILE=$(abspath $(objtree)/rust/bindings_generated.rs) \ |
| $(if $(skip_clippy),$(RUSTC),$(RUSTC_OR_CLIPPY)) \ |
| $(rustc_flags) $(rustc_cross_flags) $(rustc_target_flags) \ |
| --crate-type rlib --out-dir $(objtree)/rust/ -L $(objtree)/rust/ \ |
| --crate-name $(patsubst %.o,%,$(notdir $@)) $<; \ |
| mv $(objtree)/rust/$(patsubst %.o,%,$(notdir $@)).d $(depfile); \ |
| sed -i '/^\#/d' $(depfile) \ |
| $(if $(rustc_objcopy),;$(OBJCOPY) $(rustc_objcopy) $@) |
| |
| # `$(rustc_flags)` is passed in case the user added `--sysroot`. |
| rustc_sysroot = $(shell $(RUSTC) $(rustc_flags) --print sysroot) |
| rustc_src = $(rustc_sysroot)/lib/rustlib/src/rust |
| |
| .SECONDEXPANSION: |
| $(objtree)/rust/core.o: private skip_clippy = 1 |
| $(objtree)/rust/core.o: $$(rustc_src)/library/core/src/lib.rs FORCE |
| $(call if_changed_dep,rustc_library) |
| |
| $(objtree)/rust/compiler_builtins.o: private rustc_objcopy = -w -W '__*' |
| $(objtree)/rust/compiler_builtins.o: $(srctree)/rust/compiler_builtins.rs \ |
| $(objtree)/rust/core.o FORCE |
| $(call if_changed_dep,rustc_library) |
| |
| $(objtree)/rust/alloc.o: private skip_clippy = 1 |
| $(objtree)/rust/alloc.o: $$(rustc_src)/library/alloc/src/lib.rs \ |
| $(objtree)/rust/compiler_builtins.o FORCE |
| $(call if_changed_dep,rustc_library) |
| |
| # ICE on `--extern module`: https://github.com/rust-lang/rust/issues/56935 |
| $(objtree)/rust/kernel.o: private rustc_target_flags = --extern alloc \ |
| --extern module=$(objtree)/rust/libmodule.so |
| $(objtree)/rust/kernel.o: $(srctree)/rust/kernel/lib.rs $(objtree)/rust/alloc.o \ |
| $(objtree)/rust/libmodule.so $(objtree)/rust/bindings_generated.rs FORCE |
| $(call if_changed_dep,rustc_library) |
