Gary Guo cb7d9defda rust: compiler_builtins: make stubs non-global ... Currently we define a number of stubs for compiler-builtin intrinsics that compiled libcore generates. The defined stubs are weak so they will not conflict with genuine implementation of these intrinsics, but their effect is global and will cause non-libcore code that accidently generate these intrinsics calls compile and bug on runtime. Instead of defining a stub that can affect all code, this patch uses objcopy's `--redefine-sym` flag to redirect these calls (from libcore only) to a prefixed version (e.g. redirect `__multi3` to `__rust_multi3`), so we can define panciking stubs that are only visible to libcore. This patch was previously discussed on GitHub [1]. This approach was also independently proposed by Nick Desaulniers in [2]. Link: https://github.com/Rust-for-Linux/linux/pull/779 [1] Link: https://lore.kernel.org/lkml/CAKwvOdkc0Qhwu=gfe1+H23TnAa6jnO6A3ZCO687dH6mSrATmDA@mail.gmail.com/ Suggested-by: Nick Desaulniers <ndesaulniers@google.com> Acked-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Gary Guo <gary@garyguo.net> Reviewed-by: Wei Liu <wei.liu@kernel.org> Signed-off-by: Miguel Ojeda <ojeda@kernel.org>		2023-01-16 21:04:34 +01:00
..
alloc	rust: alloc: remove the borrow module (ToOwned, Cow)	2023-01-16 21:03:49 +01:00
bindings	rust: add bindings crate	2022-09-28 08:58:00 +02:00
kernel	rust: types: add Opaque type	2022-12-04 01:59:16 +01:00
macros	rust: macros: take string literals in module!	2022-12-04 01:59:15 +01:00
.gitignore	Kbuild: add Rust support	2022-09-28 09:02:20 +02:00
bindgen_parameters	Kbuild: add Rust support	2022-09-28 09:02:20 +02:00
build_error.rs	rust: add build_error crate	2022-12-04 01:59:16 +01:00
compiler_builtins.rs	rust: compiler_builtins: make stubs non-global	2023-01-16 21:04:34 +01:00
exports.c	rust: add build_error crate	2022-12-04 01:59:16 +01:00
helpers.c	rust: add C helpers	2022-09-28 08:56:43 +02:00
Makefile	rust: compiler_builtins: make stubs non-global	2023-01-16 21:04:34 +01:00