On Wed, Apr 14, 2021 at 08:45:55PM +0200, ojeda@xxxxxxxxxx wrote: > diff --git a/scripts/Makefile.build b/scripts/Makefile.build > index 1b6094a13034..3665c49c4dcf 100644 > --- a/scripts/Makefile.build > +++ b/scripts/Makefile.build > @@ -26,6 +26,7 @@ EXTRA_CPPFLAGS := > EXTRA_LDFLAGS := > asflags-y := > ccflags-y := > +rustcflags-y := > cppflags-y := > ldflags-y := > > @@ -287,6 +288,24 @@ quiet_cmd_cc_lst_c = MKLST $@ > $(obj)/%.lst: $(src)/%.c FORCE > $(call if_changed_dep,cc_lst_c) > > +# Compile Rust sources (.rs) > +# --------------------------------------------------------------------------- > + > +rustc_cross_flags := --target=$(srctree)/arch/$(SRCARCH)/rust/target.json > + > +quiet_cmd_rustc_o_rs = $(RUSTC_OR_CLIPPY_QUIET) $(quiet_modtag) $@ > + cmd_rustc_o_rs = \ > + RUST_MODFILE=$(modfile) \ > + $(RUSTC_OR_CLIPPY) $(rustc_flags) $(rustc_cross_flags) \ > + --extern alloc --extern kernel \ > + --crate-type rlib --out-dir $(obj) -L $(objtree)/rust/ \ > + --crate-name $(patsubst %.o,%,$(notdir $@)) $<; \ > + mv $(obj)/$(subst .o,,$(notdir $@)).d $(depfile); \ > + sed -i '/^\#/d' $(depfile) > + > +$(obj)/%.o: $(src)/%.rs FORCE > + $(call if_changed_dep,rustc_o_rs) > + > # Compile assembler sources (.S) > # --------------------------------------------------------------------------- > So if I read all this right, rust compiles to .o and, like any other .o file is then fed into objtool (for x86_64). Did you have any problems with objtool? Does it generate correct ORC unwind information? AFAICT rust has try/throw/catch exception handling (like C++/Java/others) which is typically implemented with stack unwinding of its own. Does all that interact sanely?
