forked from torvalds/linux
-
Notifications
You must be signed in to change notification settings - Fork 434
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Merge pull request #80 from Rust-for-Linux/compiler_builtins
Integrate `compiler_builtins`
- Loading branch information
Showing
6 changed files
with
135 additions
and
27 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,128 @@ | ||
| // SPDX-License-Identifier: GPL-2.0 | ||
|
|
||
| //! Our `compiler_builtins`. | ||
| //! | ||
| //! Rust provides `compiler_builtins` as a port of LLVM's `compiler-rt`. | ||
| //! Since we don't need the vast majority of them, we avoid the dependency | ||
| //! by providing this file. | ||
| //! | ||
| //! At the moment, some builtins are required that shouldn't be. For instance, | ||
| //! `core` has floating-point functionality which we shouldn't be compiling in. | ||
| //! For the moment, we define them to `panic!` at runtime for simplicity. | ||
| //! These are actually a superset of the ones we actually need to define, | ||
| //! but it seems simpler to ban entire categories at once. In the future, | ||
| //! we might be able to remove all this by providing our own custom `core` etc., | ||
| //! or perhaps `core` itself might provide `cfg` options to disable enough | ||
| //! functionality to avoid requiring some of these. | ||
| //! | ||
| //! In any case, all these symbols are weakened to ensure we don't override | ||
| //! those that may be provided by the rest of the kernel. | ||
| #![feature(compiler_builtins)] | ||
| #![compiler_builtins] | ||
|
|
||
| #![no_builtins] | ||
| #![no_std] | ||
|
|
||
| macro_rules! define_panicking_intrinsics( | ||
| ($reason: tt, { $($ident: ident, )* }) => { | ||
| $( | ||
| #[no_mangle] | ||
| pub extern "C" fn $ident() { | ||
| panic!($reason); | ||
| } | ||
| )* | ||
| } | ||
| ); | ||
|
|
||
| define_panicking_intrinsics!("non-inline stack probes should not be used", { | ||
| __rust_probestack, | ||
| }); | ||
|
|
||
| define_panicking_intrinsics!("`f32` should not be used", { | ||
| __addsf3, | ||
| __addsf3vfp, | ||
| __divsf3, | ||
| __divsf3vfp, | ||
| __eqsf2, | ||
| __eqsf2vfp, | ||
| __fixsfdi, | ||
| __fixsfsi, | ||
| __fixsfti, | ||
| __fixunssfdi, | ||
| __fixunssfsi, | ||
| __fixunssfti, | ||
| __floatdisf, | ||
| __floatsisf, | ||
| __floattisf, | ||
| __floatundisf, | ||
| __floatunsisf, | ||
| __floatuntisf, | ||
| __gesf2, | ||
| __gesf2vfp, | ||
| __gtsf2, | ||
| __gtsf2vfp, | ||
| __lesf2, | ||
| __lesf2vfp, | ||
| __ltsf2, | ||
| __ltsf2vfp, | ||
| __mulsf3, | ||
| __mulsf3vfp, | ||
| __nesf2, | ||
| __nesf2vfp, | ||
| __powisf2, | ||
| __subsf3, | ||
| __subsf3vfp, | ||
| __unordsf2, | ||
| }); | ||
|
|
||
| define_panicking_intrinsics!("`f64` should not be used", { | ||
| __adddf3, | ||
| __adddf3vfp, | ||
| __divdf3, | ||
| __divdf3vfp, | ||
| __eqdf2, | ||
| __eqdf2vfp, | ||
| __fixdfdi, | ||
| __fixdfsi, | ||
| __fixdfti, | ||
| __fixunsdfdi, | ||
| __fixunsdfsi, | ||
| __fixunsdfti, | ||
| __floatdidf, | ||
| __floatsidf, | ||
| __floattidf, | ||
| __floatundidf, | ||
| __floatunsidf, | ||
| __floatuntidf, | ||
| __gedf2, | ||
| __gedf2vfp, | ||
| __gtdf2, | ||
| __gtdf2vfp, | ||
| __ledf2, | ||
| __ledf2vfp, | ||
| __ltdf2, | ||
| __ltdf2vfp, | ||
| __muldf3, | ||
| __muldf3vfp, | ||
| __nedf2, | ||
| __nedf2vfp, | ||
| __powidf2, | ||
| __subdf3, | ||
| __subdf3vfp, | ||
| __unorddf2, | ||
| }); | ||
|
|
||
| define_panicking_intrinsics!("`i128` should not be used", { | ||
| __ashrti3, | ||
| __muloti4, | ||
| __multi3, | ||
| }); | ||
|
|
||
| define_panicking_intrinsics!("`u128` should not be used", { | ||
| __ashlti3, | ||
| __lshrti3, | ||
| __udivmodti4, | ||
| __udivti3, | ||
| __umodti3, | ||
| }); |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters