cb7d9defda
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> |
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| .. | ||
| alloc | ||
| bindings | ||
| kernel | ||
| macros | ||
| .gitignore | ||
| Makefile | ||
| bindgen_parameters | ||
| build_error.rs | ||
| compiler_builtins.rs | ||
| exports.c | ||
| helpers.c | ||